linux_signal.c revision 1.50
1 /* $NetBSD: linux_signal.c,v 1.50 2006/09/13 00:52:07 christos 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 2006/09/13 00:52:07 christos 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(l, v, retval) 284 struct lwp *l; 285 void *v; 286 register_t *retval; 287 { 288 struct linux_sys_rt_sigaction_args /* { 289 syscallarg(int) signum; 290 syscallarg(const struct linux_sigaction *) nsa; 291 syscallarg(struct linux_sigaction *) osa; 292 syscallarg(size_t) sigsetsize; 293 } */ *uap = v; 294 struct proc *p = l->l_proc; 295 struct linux_sigaction nlsa, olsa; 296 struct sigaction nbsa, obsa; 297 int error, sig; 298 void *tramp = NULL; 299 int vers = 0; 300 #if defined __amd64__ 301 struct sigacts *ps = p->p_sigacts; 302 #endif 303 304 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 305 return (EINVAL); 306 307 if (SCARG(uap, nsa)) { 308 error = copyin(SCARG(uap, nsa), &nlsa, sizeof(nlsa)); 309 if (error) 310 return (error); 311 linux_to_native_sigaction(&nbsa, &nlsa); 312 } 313 314 sig = SCARG(uap, signum); 315 if (sig < 0 || sig >= LINUX__NSIG) 316 return (EINVAL); 317 if (sig > 0 && !linux_to_native_signo[sig]) { 318 /* Pretend that we did something useful for unknown signals. */ 319 obsa.sa_handler = SIG_IGN; 320 sigemptyset(&obsa.sa_mask); 321 obsa.sa_flags = 0; 322 } else { 323 #if defined __amd64__ 324 if (nlsa.linux_sa_flags & LINUX_SA_RESTORER) { 325 if ((tramp = nlsa.linux_sa_restorer) != NULL) 326 vers = 2; /* XXX arch dependant */ 327 } 328 #endif 329 330 error = sigaction1(p, linux_to_native_signo[sig], 331 SCARG(uap, nsa) ? &nbsa : NULL, 332 SCARG(uap, osa) ? &obsa : NULL, 333 tramp, vers); 334 if (error) 335 return (error); 336 } 337 if (SCARG(uap, osa)) { 338 native_to_linux_sigaction(&olsa, &obsa); 339 340 #if defined __amd64__ 341 if (ps->sa_sigdesc[sig].sd_vers != 0) { 342 olsa.linux_sa_restorer = ps->sa_sigdesc[sig].sd_tramp; 343 olsa.linux_sa_flags |= LINUX_SA_RESTORER; 344 } 345 #endif 346 347 error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa)); 348 if (error) 349 return (error); 350 } 351 return (0); 352 } 353 354 int 355 linux_sigprocmask1(p, how, set, oset) 356 struct proc *p; 357 int how; 358 const linux_old_sigset_t *set; 359 linux_old_sigset_t *oset; 360 { 361 linux_old_sigset_t nlss, olss; 362 sigset_t nbss, obss; 363 int error; 364 365 switch (how) { 366 case LINUX_SIG_BLOCK: 367 how = SIG_BLOCK; 368 break; 369 case LINUX_SIG_UNBLOCK: 370 how = SIG_UNBLOCK; 371 break; 372 case LINUX_SIG_SETMASK: 373 how = SIG_SETMASK; 374 break; 375 default: 376 return (EINVAL); 377 } 378 379 if (set) { 380 error = copyin(set, &nlss, sizeof(nlss)); 381 if (error) 382 return (error); 383 linux_old_to_native_sigset(&nbss, &nlss); 384 } 385 error = sigprocmask1(p, how, 386 set ? &nbss : NULL, oset ? &obss : NULL); 387 if (error) 388 return (error); 389 if (oset) { 390 native_to_linux_old_sigset(&olss, &obss); 391 error = copyout(&olss, oset, sizeof(olss)); 392 if (error) 393 return (error); 394 } 395 return (error); 396 } 397 398 int 399 linux_sys_rt_sigprocmask(l, v, retval) 400 struct lwp *l; 401 void *v; 402 register_t *retval; 403 { 404 struct linux_sys_rt_sigprocmask_args /* { 405 syscallarg(int) how; 406 syscallarg(const linux_sigset_t *) set; 407 syscallarg(linux_sigset_t *) oset; 408 syscallarg(size_t) sigsetsize; 409 } */ *uap = v; 410 struct proc *p = l->l_proc; 411 linux_sigset_t nlss, olss, *oset; 412 const linux_sigset_t *set; 413 sigset_t nbss, obss; 414 int error, how; 415 416 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 417 return (EINVAL); 418 419 switch (SCARG(uap, how)) { 420 case LINUX_SIG_BLOCK: 421 how = SIG_BLOCK; 422 break; 423 case LINUX_SIG_UNBLOCK: 424 how = SIG_UNBLOCK; 425 break; 426 case LINUX_SIG_SETMASK: 427 how = SIG_SETMASK; 428 break; 429 default: 430 return (EINVAL); 431 } 432 433 set = SCARG(uap, set); 434 oset = SCARG(uap, oset); 435 436 if (set) { 437 error = copyin(set, &nlss, sizeof(nlss)); 438 if (error) 439 return (error); 440 linux_to_native_sigset(&nbss, &nlss); 441 } 442 error = sigprocmask1(p, how, 443 set ? &nbss : NULL, oset ? &obss : NULL); 444 if (!error && oset) { 445 native_to_linux_sigset(&olss, &obss); 446 error = copyout(&olss, oset, sizeof(olss)); 447 } 448 return (error); 449 } 450 451 int 452 linux_sys_rt_sigpending(l, v, retval) 453 struct lwp *l; 454 void *v; 455 register_t *retval; 456 { 457 struct linux_sys_rt_sigpending_args /* { 458 syscallarg(linux_sigset_t *) set; 459 syscallarg(size_t) sigsetsize; 460 } */ *uap = v; 461 struct proc *p = l->l_proc; 462 sigset_t bss; 463 linux_sigset_t lss; 464 465 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 466 return (EINVAL); 467 468 sigpending1(p, &bss); 469 native_to_linux_sigset(&lss, &bss); 470 return copyout(&lss, SCARG(uap, set), sizeof(lss)); 471 } 472 473 #ifndef __amd64__ 474 int 475 linux_sys_sigpending(l, v, retval) 476 struct lwp *l; 477 void *v; 478 register_t *retval; 479 { 480 struct linux_sys_sigpending_args /* { 481 syscallarg(linux_old_sigset_t *) mask; 482 } */ *uap = v; 483 struct proc *p = l->l_proc; 484 sigset_t bss; 485 linux_old_sigset_t lss; 486 487 sigpending1(p, &bss); 488 native_to_linux_old_sigset(&lss, &bss); 489 return copyout(&lss, SCARG(uap, set), sizeof(lss)); 490 } 491 492 int 493 linux_sys_sigsuspend(l, v, retval) 494 struct lwp *l; 495 void *v; 496 register_t *retval; 497 { 498 struct linux_sys_sigsuspend_args /* { 499 syscallarg(caddr_t) restart; 500 syscallarg(int) oldmask; 501 syscallarg(int) mask; 502 } */ *uap = v; 503 struct proc *p = l->l_proc; 504 linux_old_sigset_t lss; 505 sigset_t bss; 506 507 lss = SCARG(uap, mask); 508 linux_old_to_native_sigset(&bss, &lss); 509 return (sigsuspend1(p, &bss)); 510 } 511 #endif /* __amd64__ */ 512 513 int 514 linux_sys_rt_sigsuspend(l, v, retval) 515 struct lwp *l; 516 void *v; 517 register_t *retval; 518 { 519 struct linux_sys_rt_sigsuspend_args /* { 520 syscallarg(linux_sigset_t *) unewset; 521 syscallarg(size_t) sigsetsize; 522 } */ *uap = v; 523 struct proc *p = l->l_proc; 524 linux_sigset_t lss; 525 sigset_t bss; 526 int error; 527 528 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 529 return (EINVAL); 530 531 error = copyin(SCARG(uap, unewset), &lss, sizeof(linux_sigset_t)); 532 if (error) 533 return (error); 534 535 linux_to_native_sigset(&bss, &lss); 536 537 return (sigsuspend1(p, &bss)); 538 } 539 540 /* 541 * Once more: only a signal conversion is needed. 542 * Note: also used as sys_rt_queueinfo. The info field is ignored. 543 */ 544 int 545 linux_sys_rt_queueinfo(l, v, retval) 546 struct lwp *l; 547 void *v; 548 register_t *retval; 549 { 550 /* XXX XAX This isn't this really int, int, siginfo_t *, is it? */ 551 #if 0 552 struct linux_sys_rt_queueinfo_args /* { 553 syscallarg(int) pid; 554 syscallarg(int) signum; 555 syscallarg(siginfo_t *) uinfo; 556 } */ *uap = v; 557 #endif 558 559 /* XXX To really implement this we need to */ 560 /* XXX keep a list of queued signals somewhere. */ 561 return (linux_sys_kill(l, v, retval)); 562 } 563 564 int 565 linux_sys_kill(l, v, retval) 566 struct lwp *l; 567 void *v; 568 register_t *retval; 569 { 570 struct linux_sys_kill_args /* { 571 syscallarg(int) pid; 572 syscallarg(int) signum; 573 } */ *uap = v; 574 575 struct sys_kill_args ka; 576 int sig; 577 578 SCARG(&ka, pid) = SCARG(uap, pid); 579 sig = SCARG(uap, signum); 580 if (sig < 0 || sig >= LINUX__NSIG) 581 return (EINVAL); 582 SCARG(&ka, signum) = linux_to_native_signo[sig]; 583 return sys_kill(l, &ka, retval); 584 } 585 586 #ifdef LINUX_SS_ONSTACK 587 static void linux_to_native_sigaltstack __P((struct sigaltstack *, 588 const struct linux_sigaltstack *)); 589 590 static void 591 linux_to_native_sigaltstack(bss, lss) 592 struct sigaltstack *bss; 593 const struct linux_sigaltstack *lss; 594 { 595 bss->ss_sp = lss->ss_sp; 596 bss->ss_size = lss->ss_size; 597 if (lss->ss_flags & LINUX_SS_ONSTACK) 598 bss->ss_flags = SS_ONSTACK; 599 else if (lss->ss_flags & LINUX_SS_DISABLE) 600 bss->ss_flags = SS_DISABLE; 601 else 602 bss->ss_flags = 0; 603 } 604 605 void 606 native_to_linux_sigaltstack(lss, bss) 607 struct linux_sigaltstack *lss; 608 const struct sigaltstack *bss; 609 { 610 lss->ss_sp = bss->ss_sp; 611 lss->ss_size = bss->ss_size; 612 if (bss->ss_flags & SS_ONSTACK) 613 lss->ss_flags = LINUX_SS_ONSTACK; 614 else if (bss->ss_flags & SS_DISABLE) 615 lss->ss_flags = LINUX_SS_DISABLE; 616 else 617 lss->ss_flags = 0; 618 } 619 620 int 621 linux_sys_sigaltstack(l, v, retval) 622 struct lwp *l; 623 void *v; 624 register_t *retval; 625 { 626 struct linux_sys_sigaltstack_args /* { 627 syscallarg(const struct linux_sigaltstack *) ss; 628 syscallarg(struct linux_sigaltstack *) oss; 629 } */ *uap = v; 630 struct proc *p = l->l_proc; 631 struct linux_sigaltstack ss; 632 struct sigaltstack nss; 633 int error; 634 635 if (SCARG(uap, oss)) { 636 native_to_linux_sigaltstack(&ss, &p->p_sigctx.ps_sigstk); 637 if ((error = copyout(&ss, SCARG(uap, oss), sizeof(ss))) != 0) 638 return error; 639 } 640 641 if (SCARG(uap, ss) != NULL) { 642 if ((error = copyin(SCARG(uap, ss), &ss, sizeof(ss))) != 0) 643 return error; 644 linux_to_native_sigaltstack(&nss, &ss); 645 646 if (nss.ss_flags & ~SS_ALLBITS) 647 return EINVAL; 648 649 if (nss.ss_flags & SS_DISABLE) { 650 if (p->p_sigctx.ps_sigstk.ss_flags & SS_ONSTACK) 651 return EINVAL; 652 } else { 653 if (nss.ss_size < LINUX_MINSIGSTKSZ) 654 return ENOMEM; 655 } 656 p->p_sigctx.ps_sigstk = nss; 657 } 658 659 return 0; 660 } 661 #endif /* LINUX_SS_ONSTACK */ 662 663 #ifdef LINUX_NPTL 664 int 665 linux_sys_tkill(l, v, retval) 666 struct lwp *l; 667 void *v; 668 register_t *retval; 669 { 670 struct linux_sys_tkill_args /* { 671 syscallarg(int) tid; 672 syscallarg(int) sig; 673 } */ *uap = v; 674 struct linux_sys_kill_args cup; 675 676 /* We use the PID as the TID ... */ 677 SCARG(&cup, pid) = SCARG(uap, tid); 678 SCARG(&cup, signum) = SCARG(uap, sig); 679 680 return linux_sys_kill(l, &cup, retval); 681 } 682 683 int 684 linux_sys_tgkill(l, v, retval) 685 struct lwp *l; 686 void *v; 687 register_t *retval; 688 { 689 struct linux_sys_tgkill_args /* { 690 syscallarg(int) tgid; 691 syscallarg(int) tid; 692 syscallarg(int) sig; 693 } */ *uap = v; 694 struct linux_sys_kill_args cup; 695 struct linux_emuldata *led; 696 struct proc *p; 697 698 SCARG(&cup, pid) = SCARG(uap, tid); 699 SCARG(&cup, signum) = SCARG(uap, sig); 700 701 if (SCARG(uap, tgid) == -1) 702 return linux_sys_kill(l, &cup, retval); 703 704 /* We use the PID as the TID, but make sure the group ID is right */ 705 if ((p = pfind(SCARG(uap, tid))) == NULL) 706 return ESRCH; 707 708 if (p->p_emul != &emul_linux) 709 return ESRCH; 710 711 led = p->p_emuldata; 712 713 if (led->s->group_pid != SCARG(uap, tgid)) 714 return ESRCH; 715 716 return linux_sys_kill(l, &cup, retval); 717 } 718 #endif /* LINUX_NPTL */ 719
Indexes created Sun Sep 21 20:09:37 GMT 2025