ibcs2_signal.c revision 76166
1/* 2 * Copyright (c) 1995 Scott Bartram 3 * Copyright (c) 1995 Steven Wallace 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: head/sys/i386/ibcs2/ibcs2_signal.c 76166 2001-05-01 08:13:21Z markm $ 29 */ 30 31#include <sys/param.h> 32#include <sys/systm.h> 33#include <sys/lock.h> 34#include <sys/mutex.h> 35#include <sys/signalvar.h> 36#include <sys/sysproto.h> 37 38#include <i386/ibcs2/ibcs2_types.h> 39#include <i386/ibcs2/ibcs2_signal.h> 40#include <i386/ibcs2/ibcs2_proto.h> 41#include <i386/ibcs2/ibcs2_xenix.h> 42#include <i386/ibcs2/ibcs2_util.h> 43 44#define sigemptyset(s) SIGEMPTYSET(*(s)) 45#define sigismember(s, n) SIGISMEMBER(*(s), n) 46#define sigaddset(s, n) SIGADDSET(*(s), n) 47 48#define ibcs2_sigmask(n) (1 << ((n) - 1)) 49#define ibcs2_sigemptyset(s) bzero((s), sizeof(*(s))) 50#define ibcs2_sigismember(s, n) (*(s) & ibcs2_sigmask(n)) 51#define ibcs2_sigaddset(s, n) (*(s) |= ibcs2_sigmask(n)) 52 53static void ibcs2_to_bsd_sigset __P((const ibcs2_sigset_t *, sigset_t *)); 54static void bsd_to_ibcs2_sigset __P((const sigset_t *, ibcs2_sigset_t *)); 55static void ibcs2_to_bsd_sigaction __P((struct ibcs2_sigaction *, 56 struct sigaction *)); 57static void bsd_to_ibcs2_sigaction __P((struct sigaction *, 58 struct ibcs2_sigaction *)); 59 60int bsd_to_ibcs2_sig[IBCS2_SIGTBLSZ] = { 61 IBCS2_SIGHUP, /* 1 */ 62 IBCS2_SIGINT, /* 2 */ 63 IBCS2_SIGQUIT, /* 3 */ 64 IBCS2_SIGILL, /* 4 */ 65 IBCS2_SIGTRAP, /* 5 */ 66 IBCS2_SIGABRT, /* 6 */ 67 IBCS2_SIGEMT, /* 7 */ 68 IBCS2_SIGFPE, /* 8 */ 69 IBCS2_SIGKILL, /* 9 */ 70 IBCS2_SIGBUS, /* 10 */ 71 IBCS2_SIGSEGV, /* 11 */ 72 IBCS2_SIGSYS, /* 12 */ 73 IBCS2_SIGPIPE, /* 13 */ 74 IBCS2_SIGALRM, /* 14 */ 75 IBCS2_SIGTERM, /* 15 */ 76 0, /* 16 - SIGURG */ 77 IBCS2_SIGSTOP, /* 17 */ 78 IBCS2_SIGTSTP, /* 18 */ 79 IBCS2_SIGCONT, /* 19 */ 80 IBCS2_SIGCLD, /* 20 */ 81 IBCS2_SIGTTIN, /* 21 */ 82 IBCS2_SIGTTOU, /* 22 */ 83 IBCS2_SIGPOLL, /* 23 */ 84 0, /* 24 - SIGXCPU */ 85 0, /* 25 - SIGXFSZ */ 86 IBCS2_SIGVTALRM, /* 26 */ 87 IBCS2_SIGPROF, /* 27 */ 88 IBCS2_SIGWINCH, /* 28 */ 89 0, /* 29 */ 90 IBCS2_SIGUSR1, /* 30 */ 91 IBCS2_SIGUSR2, /* 31 */ 92 0 /* 32 */ 93}; 94 95static int ibcs2_to_bsd_sig[IBCS2_SIGTBLSZ] = { 96 SIGHUP, /* 1 */ 97 SIGINT, /* 2 */ 98 SIGQUIT, /* 3 */ 99 SIGILL, /* 4 */ 100 SIGTRAP, /* 5 */ 101 SIGABRT, /* 6 */ 102 SIGEMT, /* 7 */ 103 SIGFPE, /* 8 */ 104 SIGKILL, /* 9 */ 105 SIGBUS, /* 10 */ 106 SIGSEGV, /* 11 */ 107 SIGSYS, /* 12 */ 108 SIGPIPE, /* 13 */ 109 SIGALRM, /* 14 */ 110 SIGTERM, /* 15 */ 111 SIGUSR1, /* 16 */ 112 SIGUSR2, /* 17 */ 113 SIGCHLD, /* 18 */ 114 0, /* 19 - SIGPWR */ 115 SIGWINCH, /* 20 */ 116 0, /* 21 */ 117 SIGIO, /* 22 */ 118 SIGSTOP, /* 23 */ 119 SIGTSTP, /* 24 */ 120 SIGCONT, /* 25 */ 121 SIGTTIN, /* 26 */ 122 SIGTTOU, /* 27 */ 123 SIGVTALRM, /* 28 */ 124 SIGPROF, /* 29 */ 125 0, /* 30 */ 126 0, /* 31 */ 127 0 /* 32 */ 128}; 129 130void 131ibcs2_to_bsd_sigset(iss, bss) 132 const ibcs2_sigset_t *iss; 133 sigset_t *bss; 134{ 135 int i, newsig; 136 137 sigemptyset(bss); 138 for (i = 1; i <= IBCS2_SIGTBLSZ; i++) { 139 if (ibcs2_sigismember(iss, i)) { 140 newsig = ibcs2_to_bsd_sig[_SIG_IDX(i)]; 141 if (newsig) 142 sigaddset(bss, newsig); 143 } 144 } 145} 146 147static void 148bsd_to_ibcs2_sigset(bss, iss) 149 const sigset_t *bss; 150 ibcs2_sigset_t *iss; 151{ 152 int i, newsig; 153 154 ibcs2_sigemptyset(iss); 155 for (i = 1; i <= IBCS2_SIGTBLSZ; i++) { 156 if (sigismember(bss, i)) { 157 newsig = bsd_to_ibcs2_sig[_SIG_IDX(i)]; 158 if (newsig) 159 ibcs2_sigaddset(iss, newsig); 160 } 161 } 162} 163 164static void 165ibcs2_to_bsd_sigaction(isa, bsa) 166 struct ibcs2_sigaction *isa; 167 struct sigaction *bsa; 168{ 169 170 bsa->sa_handler = isa->isa_handler; 171 ibcs2_to_bsd_sigset(&isa->isa_mask, &bsa->sa_mask); 172 bsa->sa_flags = 0; /* ??? SA_NODEFER */ 173 if ((isa->isa_flags & IBCS2_SA_NOCLDSTOP) != 0) 174 bsa->sa_flags |= SA_NOCLDSTOP; 175} 176 177static void 178bsd_to_ibcs2_sigaction(bsa, isa) 179 struct sigaction *bsa; 180 struct ibcs2_sigaction *isa; 181{ 182 183 isa->isa_handler = bsa->sa_handler; 184 bsd_to_ibcs2_sigset(&bsa->sa_mask, &isa->isa_mask); 185 isa->isa_flags = 0; 186 if ((bsa->sa_flags & SA_NOCLDSTOP) != 0) 187 isa->isa_flags |= IBCS2_SA_NOCLDSTOP; 188} 189 190int 191ibcs2_sigaction(p, uap) 192 register struct proc *p; 193 struct ibcs2_sigaction_args *uap; 194{ 195 struct ibcs2_sigaction *nisa, *oisa, tmpisa; 196 struct sigaction *nbsa, *obsa, tmpbsa; 197 struct sigaction_args sa; 198 caddr_t sg; 199 int error; 200 201 sg = stackgap_init(); 202 nisa = SCARG(uap, act); 203 oisa = SCARG(uap, oact); 204 205 if (oisa != NULL) 206 obsa = stackgap_alloc(&sg, sizeof(struct sigaction)); 207 else 208 obsa = NULL; 209 210 if (nisa != NULL) { 211 nbsa = stackgap_alloc(&sg, sizeof(struct sigaction)); 212 if ((error = copyin(nisa, &tmpisa, sizeof(tmpisa))) != 0) 213 return error; 214 ibcs2_to_bsd_sigaction(&tmpisa, &tmpbsa); 215 if ((error = copyout(&tmpbsa, nbsa, sizeof(tmpbsa))) != 0) 216 return error; 217 } else 218 nbsa = NULL; 219 220 SCARG(&sa, sig) = ibcs2_to_bsd_sig[_SIG_IDX(SCARG(uap, sig))]; 221 SCARG(&sa, act) = nbsa; 222 SCARG(&sa, oact) = obsa; 223 224 if ((error = sigaction(p, &sa)) != 0) 225 return error; 226 227 if (oisa != NULL) { 228 if ((error = copyin(obsa, &tmpbsa, sizeof(tmpbsa))) != 0) 229 return error; 230 bsd_to_ibcs2_sigaction(&tmpbsa, &tmpisa); 231 if ((error = copyout(&tmpisa, oisa, sizeof(tmpisa))) != 0) 232 return error; 233 } 234 235 return 0; 236} 237 238int 239ibcs2_sigsys(p, uap) 240 register struct proc *p; 241 struct ibcs2_sigsys_args *uap; 242{ 243 struct sigaction sa; 244 int signum = ibcs2_to_bsd_sig[_SIG_IDX(IBCS2_SIGNO(SCARG(uap, sig)))]; 245 int error; 246 caddr_t sg = stackgap_init(); 247 248 if (signum <= 0 || signum >= IBCS2_NSIG) { 249 if (IBCS2_SIGCALL(SCARG(uap, sig)) == IBCS2_SIGNAL_MASK || 250 IBCS2_SIGCALL(SCARG(uap, sig)) == IBCS2_SIGSET_MASK) 251 p->p_retval[0] = (int)IBCS2_SIG_ERR; 252 return EINVAL; 253 } 254 255 switch (IBCS2_SIGCALL(SCARG(uap, sig))) { 256 case IBCS2_SIGSET_MASK: 257 /* 258 * Check for SIG_HOLD action. 259 * Otherwise, perform signal() except with different sa_flags. 260 */ 261 if (SCARG(uap, fp) != IBCS2_SIG_HOLD) { 262 /* add sig to mask before exececuting signal handler */ 263 sa.sa_flags = 0; 264 goto ibcs2_sigset; 265 } 266 /* else fallthrough to sighold */ 267 268 case IBCS2_SIGHOLD_MASK: 269 { 270 sigset_t mask; 271 struct sigprocmask_args sa; 272 273 SIGEMPTYSET(mask); 274 SIGADDSET(mask, signum); 275 SCARG(&sa, how) = SIG_BLOCK; 276 SCARG(&sa, set) = &mask; 277 SCARG(&sa, oset) = NULL; 278 return sigprocmask(p, &sa); 279 } 280 281 case IBCS2_SIGNAL_MASK: 282 { 283 struct sigaction_args sa_args; 284 struct sigaction *nbsa, *obsa; 285 286 /* do not automatically block signal */ 287 sa.sa_flags = SA_NODEFER; 288#ifdef SA_RESETHAND 289 if((signum != IBCS2_SIGILL) && 290 (signum != IBCS2_SIGTRAP) && 291 (signum != IBCS2_SIGPWR)) 292 /* set to SIG_DFL before executing handler */ 293 sa.sa_flags |= SA_RESETHAND; 294#endif 295 ibcs2_sigset: 296 nbsa = stackgap_alloc(&sg, sizeof(struct sigaction)); 297 obsa = stackgap_alloc(&sg, sizeof(struct sigaction)); 298 SCARG(&sa_args, sig) = signum; 299 SCARG(&sa_args, act) = nbsa; 300 SCARG(&sa_args, oact) = obsa; 301 302 sa.sa_handler = SCARG(uap, fp); 303 sigemptyset(&sa.sa_mask); 304#if 0 305 if (signum != SIGALRM) 306 sa.sa_flags |= SA_RESTART; 307#endif 308 p->p_retval[0] = (int)IBCS2_SIG_ERR; /* init error return */ 309 310 /* perform native sigaction() */ 311 if ((error = copyout(&sa, nbsa, sizeof(sa))) != 0) 312 return error; 313 if ((error = sigaction(p, &sa_args)) != 0) { 314 DPRINTF(("signal: sigaction failed: %d\n", 315 error)); 316 return error; 317 } 318 if ((error = copyin(obsa, &sa, sizeof(sa))) != 0) 319 return error; 320 p->p_retval[0] = (int)sa.sa_handler; 321 322 /* special sigset() check */ 323 if(IBCS2_SIGCALL(SCARG(uap, sig)) == IBCS2_SIGSET_MASK) { 324 PROC_LOCK(p); 325 /* check to make sure signal is not blocked */ 326 if(sigismember(&p->p_sigmask, signum)) { 327 /* return SIG_HOLD and unblock signal*/ 328 p->p_retval[0] = (int)IBCS2_SIG_HOLD; 329 SIGDELSET(p->p_sigmask, signum); 330 } 331 PROC_UNLOCK(p); 332 } 333 334 return 0; 335 } 336 337 case IBCS2_SIGRELSE_MASK: 338 { 339 sigset_t mask; 340 struct sigprocmask_args sa; 341 342 SIGEMPTYSET(mask); 343 SIGADDSET(mask, signum); 344 SCARG(&sa, how) = SIG_UNBLOCK; 345 SCARG(&sa, set) = &mask; 346 SCARG(&sa, oset) = NULL; 347 return sigprocmask(p, &sa); 348 } 349 350 case IBCS2_SIGIGNORE_MASK: 351 { 352 struct sigaction_args sa_args; 353 struct sigaction *bsa; 354 355 bsa = stackgap_alloc(&sg, sizeof(struct sigaction)); 356 SCARG(&sa_args, sig) = signum; 357 SCARG(&sa_args, act) = bsa; 358 SCARG(&sa_args, oact) = NULL; 359 360 sa.sa_handler = SIG_IGN; 361 sigemptyset(&sa.sa_mask); 362 sa.sa_flags = 0; 363 if ((error = copyout(&sa, bsa, sizeof(sa))) != 0) 364 return error; 365 if ((error = sigaction(p, &sa_args)) != 0) { 366 DPRINTF(("sigignore: sigaction failed\n")); 367 return error; 368 } 369 return 0; 370 } 371 372 case IBCS2_SIGPAUSE_MASK: 373 { 374 sigset_t mask; 375 struct sigsuspend_args sa; 376 377 PROC_LOCK(p); 378 mask = p->p_sigmask; 379 PROC_UNLOCK(p); 380 SIGDELSET(mask, signum); 381 SCARG(&sa, sigmask) = &mask; 382 return sigsuspend(p, &sa); 383 } 384 385 default: 386 return ENOSYS; 387 } 388} 389 390int 391ibcs2_sigprocmask(p, uap) 392 register struct proc *p; 393 struct ibcs2_sigprocmask_args *uap; 394{ 395 ibcs2_sigset_t iss; 396 sigset_t bss; 397 int error = 0; 398 399 if (SCARG(uap, oset) != NULL) { 400 /* Fix the return value first if needed */ 401 PROC_LOCK(p); 402 bsd_to_ibcs2_sigset(&p->p_sigmask, &iss); 403 PROC_UNLOCK(p); 404 if ((error = copyout(&iss, SCARG(uap, oset), sizeof(iss))) != 0) 405 return error; 406 } 407 408 if (SCARG(uap, set) == NULL) 409 /* Just examine */ 410 return 0; 411 412 if ((error = copyin(SCARG(uap, set), &iss, sizeof(iss))) != 0) 413 return error; 414 415 ibcs2_to_bsd_sigset(&iss, &bss); 416 417 PROC_LOCK(p); 418 419 switch (SCARG(uap, how)) { 420 case IBCS2_SIG_BLOCK: 421 SIGSETOR(p->p_sigmask, bss); 422 SIG_CANTMASK(p->p_sigmask); 423 break; 424 425 case IBCS2_SIG_UNBLOCK: 426 SIGSETNAND(p->p_sigmask, bss); 427 break; 428 429 case IBCS2_SIG_SETMASK: 430 p->p_sigmask = bss; 431 SIG_CANTMASK(p->p_sigmask); 432 break; 433 434 default: 435 error = EINVAL; 436 break; 437 } 438 439 PROC_UNLOCK(p); 440 441 return error; 442} 443 444int 445ibcs2_sigpending(p, uap) 446 register struct proc *p; 447 struct ibcs2_sigpending_args *uap; 448{ 449 sigset_t bss; 450 ibcs2_sigset_t iss; 451 452 PROC_LOCK(p); 453 bss = p->p_siglist; 454 SIGSETAND(bss, p->p_sigmask); 455 PROC_UNLOCK(p); 456 bsd_to_ibcs2_sigset(&bss, &iss); 457 458 return copyout(&iss, SCARG(uap, mask), sizeof(iss)); 459} 460 461int 462ibcs2_sigsuspend(p, uap) 463 register struct proc *p; 464 struct ibcs2_sigsuspend_args *uap; 465{ 466 ibcs2_sigset_t sss; 467 sigset_t bss; 468 struct sigsuspend_args sa; 469 int error; 470 471 if ((error = copyin(SCARG(uap, mask), &sss, sizeof(sss))) != 0) 472 return error; 473 474 ibcs2_to_bsd_sigset(&sss, &bss); 475 SCARG(&sa, sigmask) = &bss; 476 return sigsuspend(p, &sa); 477} 478 479int 480ibcs2_pause(p, uap) 481 register struct proc *p; 482 struct ibcs2_pause_args *uap; 483{ 484 sigset_t mask; 485 struct sigsuspend_args sa; 486 487 PROC_LOCK(p); 488 mask = p->p_sigmask; 489 PROC_UNLOCK(p); 490 SCARG(&sa, sigmask) = &mask; 491 return sigsuspend(p, &sa); 492} 493 494int 495ibcs2_kill(p, uap) 496 register struct proc *p; 497 struct ibcs2_kill_args *uap; 498{ 499 struct kill_args ka; 500 501 SCARG(&ka, pid) = SCARG(uap, pid); 502 SCARG(&ka, signum) = ibcs2_to_bsd_sig[_SIG_IDX(SCARG(uap, signo))]; 503 return kill(p, &ka); 504} 505