linux_signal.c revision 1.54.14.1
1 /* $NetBSD: linux_signal.c,v 1.54.14.1 2007/10/26 15:43:59 joerg 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 1.54.14.1 2007/10/26 15:43:59 joerg 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/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 #include <compat/linux/common/linux_ipc.h> 85 #include <compat/linux/common/linux_sem.h> 86 87 #include <compat/linux/linux_syscallargs.h> 88 89 /* Locally used defines (in bsd<->linux conversion functions): */ 90 #define linux_sigemptyset(s) memset((s), 0, sizeof(*(s))) 91 #define linux_sigismember(s, n) ((s)->sig[((n) - 1) / LINUX__NSIG_BPW] \ 92 & (1 << ((n) - 1) % LINUX__NSIG_BPW)) 93 #define linux_sigaddset(s, n) ((s)->sig[((n) - 1) / LINUX__NSIG_BPW] \ 94 |= (1 << ((n) - 1) % LINUX__NSIG_BPW)) 95 96 #ifdef DEBUG_LINUX 97 #define DPRINTF(a) uprintf a 98 #else 99 #define DPRINTF(a) 100 #endif 101 102 extern const int native_to_linux_signo[]; 103 extern const int linux_to_native_signo[]; 104 105 /* 106 * Convert between Linux and BSD signal sets. 107 */ 108 #if LINUX__NSIG_WORDS > 1 109 void 110 linux_old_extra_to_native_sigset(bss, lss, extra) 111 sigset_t *bss; 112 const linux_old_sigset_t *lss; 113 const unsigned long *extra; 114 { 115 linux_sigset_t lsnew; 116 117 /* convert old sigset to new sigset */ 118 linux_sigemptyset(&lsnew); 119 lsnew.sig[0] = *lss; 120 if (extra) 121 memcpy(&lsnew.sig[1], extra, 122 sizeof(linux_sigset_t) - sizeof(linux_old_sigset_t)); 123 124 linux_to_native_sigset(bss, &lsnew); 125 } 126 127 void 128 native_to_linux_old_extra_sigset(lss, extra, bss) 129 linux_old_sigset_t *lss; 130 unsigned long *extra; 131 const sigset_t *bss; 132 { 133 linux_sigset_t lsnew; 134 135 native_to_linux_sigset(&lsnew, bss); 136 137 /* convert new sigset to old sigset */ 138 *lss = lsnew.sig[0]; 139 if (extra) 140 memcpy(extra, &lsnew.sig[1], 141 sizeof(linux_sigset_t) - sizeof(linux_old_sigset_t)); 142 } 143 #endif /* LINUX__NSIG_WORDS > 1 */ 144 145 void 146 linux_to_native_sigset(bss, lss) 147 sigset_t *bss; 148 const linux_sigset_t *lss; 149 { 150 int i, newsig; 151 152 sigemptyset(bss); 153 for (i = 1; i < LINUX__NSIG; i++) { 154 if (linux_sigismember(lss, i)) { 155 newsig = linux_to_native_signo[i]; 156 if (newsig) 157 sigaddset(bss, newsig); 158 } 159 } 160 } 161 162 void 163 native_to_linux_sigset(lss, bss) 164 linux_sigset_t *lss; 165 const sigset_t *bss; 166 { 167 int i, newsig; 168 169 linux_sigemptyset(lss); 170 for (i = 1; i < NSIG; i++) { 171 if (sigismember(bss, i)) { 172 newsig = native_to_linux_signo[i]; 173 if (newsig) 174 linux_sigaddset(lss, newsig); 175 } 176 } 177 } 178 179 unsigned int 180 native_to_linux_sigflags(bsf) 181 const int bsf; 182 { 183 unsigned int lsf = 0; 184 if ((bsf & SA_NOCLDSTOP) != 0) 185 lsf |= LINUX_SA_NOCLDSTOP; 186 if ((bsf & SA_NOCLDWAIT) != 0) 187 lsf |= LINUX_SA_NOCLDWAIT; 188 if ((bsf & SA_ONSTACK) != 0) 189 lsf |= LINUX_SA_ONSTACK; 190 if ((bsf & SA_RESTART) != 0) 191 lsf |= LINUX_SA_RESTART; 192 if ((bsf & SA_NODEFER) != 0) 193 lsf |= LINUX_SA_NOMASK; 194 if ((bsf & SA_RESETHAND) != 0) 195 lsf |= LINUX_SA_ONESHOT; 196 if ((bsf & SA_SIGINFO) != 0) 197 lsf |= LINUX_SA_SIGINFO; 198 return lsf; 199 } 200 201 int 202 linux_to_native_sigflags(lsf) 203 const unsigned long lsf; 204 { 205 int bsf = 0; 206 if ((lsf & LINUX_SA_NOCLDSTOP) != 0) 207 bsf |= SA_NOCLDSTOP; 208 if ((lsf & LINUX_SA_NOCLDWAIT) != 0) 209 bsf |= SA_NOCLDWAIT; 210 if ((lsf & LINUX_SA_ONSTACK) != 0) 211 bsf |= SA_ONSTACK; 212 if ((lsf & LINUX_SA_RESTART) != 0) 213 bsf |= SA_RESTART; 214 if ((lsf & LINUX_SA_ONESHOT) != 0) 215 bsf |= SA_RESETHAND; 216 if ((lsf & LINUX_SA_NOMASK) != 0) 217 bsf |= SA_NODEFER; 218 if ((lsf & LINUX_SA_SIGINFO) != 0) 219 bsf |= SA_SIGINFO; 220 if ((lsf & ~LINUX_SA_ALLBITS) != 0) { 221 DPRINTF(("linux_old_to_native_sigflags: " 222 "%lx extra bits ignored\n", lsf)); 223 } 224 return bsf; 225 } 226 227 /* 228 * Convert between Linux and BSD sigaction structures. 229 */ 230 void 231 linux_old_to_native_sigaction(bsa, lsa) 232 struct sigaction *bsa; 233 const struct linux_old_sigaction *lsa; 234 { 235 bsa->sa_handler = lsa->linux_sa_handler; 236 linux_old_to_native_sigset(&bsa->sa_mask, &lsa->linux_sa_mask); 237 bsa->sa_flags = linux_to_native_sigflags(lsa->linux_sa_flags); 238 } 239 240 void 241 native_to_linux_old_sigaction(lsa, bsa) 242 struct linux_old_sigaction *lsa; 243 const struct sigaction *bsa; 244 { 245 lsa->linux_sa_handler = bsa->sa_handler; 246 native_to_linux_old_sigset(&lsa->linux_sa_mask, &bsa->sa_mask); 247 lsa->linux_sa_flags = native_to_linux_sigflags(bsa->sa_flags); 248 #ifndef __alpha__ 249 lsa->linux_sa_restorer = NULL; 250 #endif 251 } 252 253 /* ...and the new sigaction conversion funcs. */ 254 void 255 linux_to_native_sigaction(bsa, lsa) 256 struct sigaction *bsa; 257 const struct linux_sigaction *lsa; 258 { 259 bsa->sa_handler = lsa->linux_sa_handler; 260 linux_to_native_sigset(&bsa->sa_mask, &lsa->linux_sa_mask); 261 bsa->sa_flags = linux_to_native_sigflags(lsa->linux_sa_flags); 262 } 263 264 void 265 native_to_linux_sigaction(lsa, bsa) 266 struct linux_sigaction *lsa; 267 const struct sigaction *bsa; 268 { 269 lsa->linux_sa_handler = bsa->sa_handler; 270 native_to_linux_sigset(&lsa->linux_sa_mask, &bsa->sa_mask); 271 lsa->linux_sa_flags = native_to_linux_sigflags(bsa->sa_flags); 272 #ifndef __alpha__ 273 lsa->linux_sa_restorer = NULL; 274 #endif 275 } 276 277 /* ----------------------------------------------------------------------- */ 278 279 /* 280 * The Linux sigaction() system call. Do the usual conversions, 281 * and just call sigaction(). Some flags and values are silently 282 * ignored (see above). 283 */ 284 int 285 linux_sys_rt_sigaction(struct lwp *l, void *v, 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 struct proc *p = l->l_proc; 360 linux_old_sigset_t nlss, olss; 361 sigset_t nbss, obss; 362 int error; 363 364 switch (how) { 365 case LINUX_SIG_BLOCK: 366 how = SIG_BLOCK; 367 break; 368 case LINUX_SIG_UNBLOCK: 369 how = SIG_UNBLOCK; 370 break; 371 case LINUX_SIG_SETMASK: 372 how = SIG_SETMASK; 373 break; 374 default: 375 return (EINVAL); 376 } 377 378 if (set) { 379 error = copyin(set, &nlss, sizeof(nlss)); 380 if (error) 381 return (error); 382 linux_old_to_native_sigset(&nbss, &nlss); 383 } 384 mutex_enter(&p->p_smutex); 385 error = sigprocmask1(l, how, 386 set ? &nbss : NULL, oset ? &obss : NULL); 387 mutex_exit(&p->p_smutex); 388 if (error) 389 return (error); 390 if (oset) { 391 native_to_linux_old_sigset(&olss, &obss); 392 error = copyout(&olss, oset, sizeof(olss)); 393 if (error) 394 return (error); 395 } 396 return (error); 397 } 398 399 int 400 linux_sys_rt_sigprocmask(struct lwp *l, void *v, 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 struct proc *p = l->l_proc; 411 sigset_t nbss, obss; 412 int error, how; 413 414 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 415 return (EINVAL); 416 417 switch (SCARG(uap, how)) { 418 case LINUX_SIG_BLOCK: 419 how = SIG_BLOCK; 420 break; 421 case LINUX_SIG_UNBLOCK: 422 how = SIG_UNBLOCK; 423 break; 424 case LINUX_SIG_SETMASK: 425 how = SIG_SETMASK; 426 break; 427 default: 428 return (EINVAL); 429 } 430 431 set = SCARG(uap, set); 432 oset = SCARG(uap, oset); 433 434 if (set) { 435 error = copyin(set, &nlss, sizeof(nlss)); 436 if (error) 437 return (error); 438 linux_to_native_sigset(&nbss, &nlss); 439 } 440 mutex_enter(&p->p_smutex); 441 error = sigprocmask1(l, how, 442 set ? &nbss : NULL, oset ? &obss : NULL); 443 mutex_exit(&p->p_smutex); 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(struct lwp *l, void *v, 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(struct lwp *l, void *v, register_t *retval) 472 { 473 struct linux_sys_sigpending_args /* { 474 syscallarg(linux_old_sigset_t *) mask; 475 } */ *uap = v; 476 sigset_t bss; 477 linux_old_sigset_t lss; 478 479 sigpending1(l, &bss); 480 native_to_linux_old_sigset(&lss, &bss); 481 return copyout(&lss, SCARG(uap, set), sizeof(lss)); 482 } 483 484 int 485 linux_sys_sigsuspend(struct lwp *l, void *v, register_t *retval) 486 { 487 struct linux_sys_sigsuspend_args /* { 488 syscallarg(void *) restart; 489 syscallarg(int) oldmask; 490 syscallarg(int) mask; 491 } */ *uap = v; 492 linux_old_sigset_t lss; 493 sigset_t bss; 494 495 lss = SCARG(uap, mask); 496 linux_old_to_native_sigset(&bss, &lss); 497 return (sigsuspend1(l, &bss)); 498 } 499 #endif /* __amd64__ */ 500 501 int 502 linux_sys_rt_sigsuspend(struct lwp *l, void *v, register_t *retval) 503 { 504 struct linux_sys_rt_sigsuspend_args /* { 505 syscallarg(linux_sigset_t *) unewset; 506 syscallarg(size_t) sigsetsize; 507 } */ *uap = v; 508 linux_sigset_t lss; 509 sigset_t bss; 510 int error; 511 512 if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t)) 513 return (EINVAL); 514 515 error = copyin(SCARG(uap, unewset), &lss, sizeof(linux_sigset_t)); 516 if (error) 517 return (error); 518 519 linux_to_native_sigset(&bss, &lss); 520 521 return (sigsuspend1(l, &bss)); 522 } 523 524 /* 525 * Once more: only a signal conversion is needed. 526 * Note: also used as sys_rt_queueinfo. The info field is ignored. 527 */ 528 int 529 linux_sys_rt_queueinfo(l, v, retval) 530 struct lwp *l; 531 void *v; 532 register_t *retval; 533 { 534 /* XXX XAX This isn't this really int, int, siginfo_t *, is it? */ 535 #if 0 536 struct linux_sys_rt_queueinfo_args /* { 537 syscallarg(int) pid; 538 syscallarg(int) signum; 539 syscallarg(siginfo_t *) uinfo; 540 } */ *uap = v; 541 #endif 542 543 /* XXX To really implement this we need to */ 544 /* XXX keep a list of queued signals somewhere. */ 545 return (linux_sys_kill(l, v, retval)); 546 } 547 548 int 549 linux_sys_kill(l, v, retval) 550 struct lwp *l; 551 void *v; 552 register_t *retval; 553 { 554 struct linux_sys_kill_args /* { 555 syscallarg(int) pid; 556 syscallarg(int) signum; 557 } */ *uap = v; 558 559 struct sys_kill_args ka; 560 int sig; 561 562 SCARG(&ka, pid) = SCARG(uap, pid); 563 sig = SCARG(uap, signum); 564 if (sig < 0 || sig >= LINUX__NSIG) 565 return (EINVAL); 566 SCARG(&ka, signum) = linux_to_native_signo[sig]; 567 return sys_kill(l, &ka, retval); 568 } 569 570 #ifdef LINUX_SS_ONSTACK 571 static void linux_to_native_sigaltstack __P((struct sigaltstack *, 572 const struct linux_sigaltstack *)); 573 574 static void 575 linux_to_native_sigaltstack(bss, lss) 576 struct sigaltstack *bss; 577 const struct linux_sigaltstack *lss; 578 { 579 bss->ss_sp = lss->ss_sp; 580 bss->ss_size = lss->ss_size; 581 if (lss->ss_flags & LINUX_SS_ONSTACK) 582 bss->ss_flags = SS_ONSTACK; 583 else if (lss->ss_flags & LINUX_SS_DISABLE) 584 bss->ss_flags = SS_DISABLE; 585 else 586 bss->ss_flags = 0; 587 } 588 589 void 590 native_to_linux_sigaltstack(lss, bss) 591 struct linux_sigaltstack *lss; 592 const struct sigaltstack *bss; 593 { 594 lss->ss_sp = bss->ss_sp; 595 lss->ss_size = bss->ss_size; 596 if (bss->ss_flags & SS_ONSTACK) 597 lss->ss_flags = LINUX_SS_ONSTACK; 598 else if (bss->ss_flags & SS_DISABLE) 599 lss->ss_flags = LINUX_SS_DISABLE; 600 else 601 lss->ss_flags = 0; 602 } 603 604 int 605 linux_sys_sigaltstack(struct lwp *l, void *v, register_t *retval) 606 { 607 struct linux_sys_sigaltstack_args /* { 608 syscallarg(const struct linux_sigaltstack *) ss; 609 syscallarg(struct linux_sigaltstack *) oss; 610 } */ *uap = v; 611 struct linux_sigaltstack ss; 612 struct sigaltstack nss; 613 struct proc *p = l->l_proc; 614 int error = 0; 615 616 if (SCARG(uap, oss)) { 617 native_to_linux_sigaltstack(&ss, &l->l_sigstk); 618 if ((error = copyout(&ss, SCARG(uap, oss), sizeof(ss))) != 0) 619 return error; 620 } 621 622 if (SCARG(uap, ss) != NULL) { 623 if ((error = copyin(SCARG(uap, ss), &ss, sizeof(ss))) != 0) 624 return error; 625 linux_to_native_sigaltstack(&nss, &ss); 626 627 mutex_enter(&p->p_smutex); 628 629 if (nss.ss_flags & ~SS_ALLBITS) 630 error = EINVAL; 631 else if (nss.ss_flags & SS_DISABLE) { 632 if (l->l_sigstk.ss_flags & SS_ONSTACK) 633 error = EINVAL; 634 } else if (nss.ss_size < LINUX_MINSIGSTKSZ) 635 error = ENOMEM; 636 637 if (error == 0) 638 l->l_sigstk = nss; 639 640 mutex_exit(&p->p_smutex); 641 } 642 643 return error; 644 } 645 #endif /* LINUX_SS_ONSTACK */ 646 647 #ifdef LINUX_NPTL 648 int 649 linux_sys_tkill(l, v, retval) 650 struct lwp *l; 651 void *v; 652 register_t *retval; 653 { 654 struct linux_sys_tkill_args /* { 655 syscallarg(int) tid; 656 syscallarg(int) sig; 657 } */ *uap = v; 658 struct linux_sys_kill_args cup; 659 660 /* We use the PID as the TID ... */ 661 SCARG(&cup, pid) = SCARG(uap, tid); 662 SCARG(&cup, signum) = SCARG(uap, sig); 663 664 return linux_sys_kill(l, &cup, retval); 665 } 666 667 int 668 linux_sys_tgkill(l, v, retval) 669 struct lwp *l; 670 void *v; 671 register_t *retval; 672 { 673 struct linux_sys_tgkill_args /* { 674 syscallarg(int) tgid; 675 syscallarg(int) tid; 676 syscallarg(int) sig; 677 } */ *uap = v; 678 struct linux_sys_kill_args cup; 679 struct linux_emuldata *led; 680 struct proc *p; 681 682 SCARG(&cup, pid) = SCARG(uap, tid); 683 SCARG(&cup, signum) = SCARG(uap, sig); 684 685 if (SCARG(uap, tgid) == -1) 686 return linux_sys_kill(l, &cup, retval); 687 688 /* We use the PID as the TID, but make sure the group ID is right */ 689 if ((p = pfind(SCARG(uap, tid))) == NULL) 690 return ESRCH; 691 692 if (p->p_emul != &emul_linux) 693 return ESRCH; 694 695 led = p->p_emuldata; 696 697 if (led->s->group_pid != SCARG(uap, tgid)) 698 return ESRCH; 699 700 return linux_sys_kill(l, &cup, retval); 701 } 702 #endif /* LINUX_NPTL */ 703
Indexes created Sun Sep 21 16:09:51 GMT 2025