linux_signal.c revision 1.50.2.1
1 /* $NetBSD: linux_signal.c,v 1.50.2.1 2006/10/22 06:05:24 yamt 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 1.50.2.1 2006/10/22 06:05:24 yamt 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 } 222 return bsf; 223 } 224 225 /* 226 * Convert between Linux and BSD sigaction structures. 227 */ 228 void 229 linux_old_to_native_sigaction(bsa, lsa) 230 struct sigaction *bsa; 231 const struct linux_old_sigaction *lsa; 232 { 233 bsa->sa_handler = lsa->linux_sa_handler; 234 linux_old_to_native_sigset(&bsa->sa_mask, &lsa->linux_sa_mask); 235 bsa->sa_flags = linux_to_native_sigflags(lsa->linux_sa_flags); 236 } 237 238 void 239 native_to_linux_old_sigaction(lsa, bsa) 240 struct linux_old_sigaction *lsa; 241 const struct sigaction *bsa; 242 { 243 lsa->linux_sa_handler = bsa->sa_handler; 244 native_to_linux_old_sigset(&lsa->linux_sa_mask, &bsa->sa_mask); 245 lsa->linux_sa_flags = native_to_linux_sigflags(bsa->sa_flags); 246 #ifndef __alpha__ 247 lsa->linux_sa_restorer = NULL; 248 #endif 249 } 250 251 /* ...and the new sigaction conversion funcs. */ 252 void 253 linux_to_native_sigaction(bsa, lsa) 254 struct sigaction *bsa; 255 const struct linux_sigaction *lsa; 256 { 257 bsa->sa_handler = lsa->linux_sa_handler; 258 linux_to_native_sigset(&bsa->sa_mask, &lsa->linux_sa_mask); 259 bsa->sa_flags = linux_to_native_sigflags(lsa->linux_sa_flags); 260 } 261 262 void 263 native_to_linux_sigaction(lsa, bsa) 264 struct linux_sigaction *lsa; 265 const struct sigaction *bsa; 266 { 267 lsa->linux_sa_handler = bsa->sa_handler; 268 native_to_linux_sigset(&lsa->linux_sa_mask, &bsa->sa_mask); 269 lsa->linux_sa_flags = native_to_linux_sigflags(bsa->sa_flags); 270 #ifndef __alpha__ 271 lsa->linux_sa_restorer = NULL; 272 #endif 273 } 274 275 /* ----------------------------------------------------------------------- */ 276 277 /* 278 * The Linux sigaction() system call. Do the usual conversions, 279 * and just call sigaction(). Some flags and values are silently 280 * ignored (see above). 281 */ 282 int 283 linux_sys_rt_sigaction(struct lwp *l, void *v, register_t *retval __unused) 284 { 285 struct linux_sys_rt_sigaction_args /* { 286 syscallarg(int) signum; 287 syscallarg(const struct linux_sigaction *) nsa; 288 syscallarg(struct linux_sigaction *) osa; 289 syscallarg(size_t) sigsetsize; 290 } */ *uap = v; 291 struct proc *p = l->l_proc; 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 = p->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(p, 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(p, how, set, oset) 353 struct proc *p; 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(p, 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 __unused) 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 struct proc *p = l->l_proc; 405 linux_sigset_t nlss, olss, *oset; 406 const linux_sigset_t *set; 407 sigset_t nbss, obss; 408 int error, how; 409 410 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 411 return (EINVAL); 412 413 switch (SCARG(uap, how)) { 414 case LINUX_SIG_BLOCK: 415 how = SIG_BLOCK; 416 break; 417 case LINUX_SIG_UNBLOCK: 418 how = SIG_UNBLOCK; 419 break; 420 case LINUX_SIG_SETMASK: 421 how = SIG_SETMASK; 422 break; 423 default: 424 return (EINVAL); 425 } 426 427 set = SCARG(uap, set); 428 oset = SCARG(uap, oset); 429 430 if (set) { 431 error = copyin(set, &nlss, sizeof(nlss)); 432 if (error) 433 return (error); 434 linux_to_native_sigset(&nbss, &nlss); 435 } 436 error = sigprocmask1(p, how, 437 set ? &nbss : NULL, oset ? &obss : NULL); 438 if (!error && oset) { 439 native_to_linux_sigset(&olss, &obss); 440 error = copyout(&olss, oset, sizeof(olss)); 441 } 442 return (error); 443 } 444 445 int 446 linux_sys_rt_sigpending(struct lwp *l, void *v, register_t *retval __unused) 447 { 448 struct linux_sys_rt_sigpending_args /* { 449 syscallarg(linux_sigset_t *) set; 450 syscallarg(size_t) sigsetsize; 451 } */ *uap = v; 452 struct proc *p = l->l_proc; 453 sigset_t bss; 454 linux_sigset_t lss; 455 456 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 457 return (EINVAL); 458 459 sigpending1(p, &bss); 460 native_to_linux_sigset(&lss, &bss); 461 return copyout(&lss, SCARG(uap, set), sizeof(lss)); 462 } 463 464 #ifndef __amd64__ 465 int 466 linux_sys_sigpending(struct lwp *l, void *v, register_t *retval __unused) 467 { 468 struct linux_sys_sigpending_args /* { 469 syscallarg(linux_old_sigset_t *) mask; 470 } */ *uap = v; 471 struct proc *p = l->l_proc; 472 sigset_t bss; 473 linux_old_sigset_t lss; 474 475 sigpending1(p, &bss); 476 native_to_linux_old_sigset(&lss, &bss); 477 return copyout(&lss, SCARG(uap, set), sizeof(lss)); 478 } 479 480 int 481 linux_sys_sigsuspend(struct lwp *l, void *v, register_t *retval __unused) 482 { 483 struct linux_sys_sigsuspend_args /* { 484 syscallarg(caddr_t) restart; 485 syscallarg(int) oldmask; 486 syscallarg(int) mask; 487 } */ *uap = v; 488 struct proc *p = l->l_proc; 489 linux_old_sigset_t lss; 490 sigset_t bss; 491 492 lss = SCARG(uap, mask); 493 linux_old_to_native_sigset(&bss, &lss); 494 return (sigsuspend1(p, &bss)); 495 } 496 #endif /* __amd64__ */ 497 498 int 499 linux_sys_rt_sigsuspend(struct lwp *l, void *v, register_t *retval __unused) 500 { 501 struct linux_sys_rt_sigsuspend_args /* { 502 syscallarg(linux_sigset_t *) unewset; 503 syscallarg(size_t) sigsetsize; 504 } */ *uap = v; 505 struct proc *p = l->l_proc; 506 linux_sigset_t lss; 507 sigset_t bss; 508 int error; 509 510 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 511 return (EINVAL); 512 513 error = copyin(SCARG(uap, unewset), &lss, sizeof(linux_sigset_t)); 514 if (error) 515 return (error); 516 517 linux_to_native_sigset(&bss, &lss); 518 519 return (sigsuspend1(p, &bss)); 520 } 521 522 /* 523 * Once more: only a signal conversion is needed. 524 * Note: also used as sys_rt_queueinfo. The info field is ignored. 525 */ 526 int 527 linux_sys_rt_queueinfo(l, v, retval) 528 struct lwp *l; 529 void *v; 530 register_t *retval; 531 { 532 /* XXX XAX This isn't this really int, int, siginfo_t *, is it? */ 533 #if 0 534 struct linux_sys_rt_queueinfo_args /* { 535 syscallarg(int) pid; 536 syscallarg(int) signum; 537 syscallarg(siginfo_t *) uinfo; 538 } */ *uap = v; 539 #endif 540 541 /* XXX To really implement this we need to */ 542 /* XXX keep a list of queued signals somewhere. */ 543 return (linux_sys_kill(l, v, retval)); 544 } 545 546 int 547 linux_sys_kill(l, v, retval) 548 struct lwp *l; 549 void *v; 550 register_t *retval; 551 { 552 struct linux_sys_kill_args /* { 553 syscallarg(int) pid; 554 syscallarg(int) signum; 555 } */ *uap = v; 556 557 struct sys_kill_args ka; 558 int sig; 559 560 SCARG(&ka, pid) = SCARG(uap, pid); 561 sig = SCARG(uap, signum); 562 if (sig < 0 || sig >= LINUX__NSIG) 563 return (EINVAL); 564 SCARG(&ka, signum) = linux_to_native_signo[sig]; 565 return sys_kill(l, &ka, retval); 566 } 567 568 #ifdef LINUX_SS_ONSTACK 569 static void linux_to_native_sigaltstack __P((struct sigaltstack *, 570 const struct linux_sigaltstack *)); 571 572 static void 573 linux_to_native_sigaltstack(bss, lss) 574 struct sigaltstack *bss; 575 const struct linux_sigaltstack *lss; 576 { 577 bss->ss_sp = lss->ss_sp; 578 bss->ss_size = lss->ss_size; 579 if (lss->ss_flags & LINUX_SS_ONSTACK) 580 bss->ss_flags = SS_ONSTACK; 581 else if (lss->ss_flags & LINUX_SS_DISABLE) 582 bss->ss_flags = SS_DISABLE; 583 else 584 bss->ss_flags = 0; 585 } 586 587 void 588 native_to_linux_sigaltstack(lss, bss) 589 struct linux_sigaltstack *lss; 590 const struct sigaltstack *bss; 591 { 592 lss->ss_sp = bss->ss_sp; 593 lss->ss_size = bss->ss_size; 594 if (bss->ss_flags & SS_ONSTACK) 595 lss->ss_flags = LINUX_SS_ONSTACK; 596 else if (bss->ss_flags & SS_DISABLE) 597 lss->ss_flags = LINUX_SS_DISABLE; 598 else 599 lss->ss_flags = 0; 600 } 601 602 int 603 linux_sys_sigaltstack(struct lwp *l, void *v, register_t *retval __unused) 604 { 605 struct linux_sys_sigaltstack_args /* { 606 syscallarg(const struct linux_sigaltstack *) ss; 607 syscallarg(struct linux_sigaltstack *) oss; 608 } */ *uap = v; 609 struct proc *p = l->l_proc; 610 struct linux_sigaltstack ss; 611 struct sigaltstack nss; 612 int error; 613 614 if (SCARG(uap, oss)) { 615 native_to_linux_sigaltstack(&ss, &p->p_sigctx.ps_sigstk); 616 if ((error = copyout(&ss, SCARG(uap, oss), sizeof(ss))) != 0) 617 return error; 618 } 619 620 if (SCARG(uap, ss) != NULL) { 621 if ((error = copyin(SCARG(uap, ss), &ss, sizeof(ss))) != 0) 622 return error; 623 linux_to_native_sigaltstack(&nss, &ss); 624 625 if (nss.ss_flags & ~SS_ALLBITS) 626 return EINVAL; 627 628 if (nss.ss_flags & SS_DISABLE) { 629 if (p->p_sigctx.ps_sigstk.ss_flags & SS_ONSTACK) 630 return EINVAL; 631 } else { 632 if (nss.ss_size < LINUX_MINSIGSTKSZ) 633 return ENOMEM; 634 } 635 p->p_sigctx.ps_sigstk = nss; 636 } 637 638 return 0; 639 } 640 #endif /* LINUX_SS_ONSTACK */ 641 642 #ifdef LINUX_NPTL 643 int 644 linux_sys_tkill(l, v, retval) 645 struct lwp *l; 646 void *v; 647 register_t *retval; 648 { 649 struct linux_sys_tkill_args /* { 650 syscallarg(int) tid; 651 syscallarg(int) sig; 652 } */ *uap = v; 653 struct linux_sys_kill_args cup; 654 655 /* We use the PID as the TID ... */ 656 SCARG(&cup, pid) = SCARG(uap, tid); 657 SCARG(&cup, signum) = SCARG(uap, sig); 658 659 return linux_sys_kill(l, &cup, retval); 660 } 661 662 int 663 linux_sys_tgkill(l, v, retval) 664 struct lwp *l; 665 void *v; 666 register_t *retval; 667 { 668 struct linux_sys_tgkill_args /* { 669 syscallarg(int) tgid; 670 syscallarg(int) tid; 671 syscallarg(int) sig; 672 } */ *uap = v; 673 struct linux_sys_kill_args cup; 674 struct linux_emuldata *led; 675 struct proc *p; 676 677 SCARG(&cup, pid) = SCARG(uap, tid); 678 SCARG(&cup, signum) = SCARG(uap, sig); 679 680 if (SCARG(uap, tgid) == -1) 681 return linux_sys_kill(l, &cup, retval); 682 683 /* We use the PID as the TID, but make sure the group ID is right */ 684 if ((p = pfind(SCARG(uap, tid))) == NULL) 685 return ESRCH; 686 687 if (p->p_emul != &emul_linux) 688 return ESRCH; 689 690 led = p->p_emuldata; 691 692 if (led->s->group_pid != SCARG(uap, tgid)) 693 return ESRCH; 694 695 return linux_sys_kill(l, &cup, retval); 696 } 697 #endif /* LINUX_NPTL */ 698
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