1 /* 2 * Emulation of Linux signals 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 #include <stdlib.h> 20 #include <stdio.h> 21 #include <string.h> 22 #include <stdarg.h> 23 #include <unistd.h> 24 #include <errno.h> 25 #include <assert.h> 26 #include <sys/ucontext.h> 27 #include <sys/resource.h> 28 29 #include "qemu.h" 30 #include "qemu-common.h" 31 #include "target_signal.h" 32 33 //#define DEBUG_SIGNAL 34 35 static struct target_sigaltstack target_sigaltstack_used = { 36 .ss_sp = 0, 37 .ss_size = 0, 38 .ss_flags = TARGET_SS_DISABLE, 39 }; 40 41 static struct target_sigaction sigact_table[TARGET_NSIG]; 42 43 static void host_signal_handler(int host_signum, siginfo_t *info, 44 void *puc); 45 46 static uint8_t host_to_target_signal_table[_NSIG] = { 47 [SIGHUP] = TARGET_SIGHUP, 48 [SIGINT] = TARGET_SIGINT, 49 [SIGQUIT] = TARGET_SIGQUIT, 50 [SIGILL] = TARGET_SIGILL, 51 [SIGTRAP] = TARGET_SIGTRAP, 52 [SIGABRT] = TARGET_SIGABRT, 53 /* [SIGIOT] = TARGET_SIGIOT,*/ 54 [SIGBUS] = TARGET_SIGBUS, 55 [SIGFPE] = TARGET_SIGFPE, 56 [SIGKILL] = TARGET_SIGKILL, 57 [SIGUSR1] = TARGET_SIGUSR1, 58 [SIGSEGV] = TARGET_SIGSEGV, 59 [SIGUSR2] = TARGET_SIGUSR2, 60 [SIGPIPE] = TARGET_SIGPIPE, 61 [SIGALRM] = TARGET_SIGALRM, 62 [SIGTERM] = TARGET_SIGTERM, 63 #ifdef SIGSTKFLT 64 [SIGSTKFLT] = TARGET_SIGSTKFLT, 65 #endif 66 [SIGCHLD] = TARGET_SIGCHLD, 67 [SIGCONT] = TARGET_SIGCONT, 68 [SIGSTOP] = TARGET_SIGSTOP, 69 [SIGTSTP] = TARGET_SIGTSTP, 70 [SIGTTIN] = TARGET_SIGTTIN, 71 [SIGTTOU] = TARGET_SIGTTOU, 72 [SIGURG] = TARGET_SIGURG, 73 [SIGXCPU] = TARGET_SIGXCPU, 74 [SIGXFSZ] = TARGET_SIGXFSZ, 75 [SIGVTALRM] = TARGET_SIGVTALRM, 76 [SIGPROF] = TARGET_SIGPROF, 77 [SIGWINCH] = TARGET_SIGWINCH, 78 [SIGIO] = TARGET_SIGIO, 79 [SIGPWR] = TARGET_SIGPWR, 80 [SIGSYS] = TARGET_SIGSYS, 81 /* next signals stay the same */ 82 /* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with 83 host libpthread signals. This assumes no one actually uses SIGRTMAX :-/ 84 To fix this properly we need to do manual signal delivery multiplexed 85 over a single host signal. */ 86 [__SIGRTMIN] = __SIGRTMAX, 87 [__SIGRTMAX] = __SIGRTMIN, 88 }; 89 static uint8_t target_to_host_signal_table[_NSIG]; 90 91 static inline int on_sig_stack(unsigned long sp) 92 { 93 return (sp - target_sigaltstack_used.ss_sp 94 < target_sigaltstack_used.ss_size); 95 } 96 97 static inline int sas_ss_flags(unsigned long sp) 98 { 99 return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE 100 : on_sig_stack(sp) ? SS_ONSTACK : 0); 101 } 102 103 int host_to_target_signal(int sig) 104 { 105 if (sig >= _NSIG) 106 return sig; 107 return host_to_target_signal_table[sig]; 108 } 109 110 int target_to_host_signal(int sig) 111 { 112 if (sig >= _NSIG) 113 return sig; 114 return target_to_host_signal_table[sig]; 115 } 116 117 static inline void target_sigemptyset(target_sigset_t *set) 118 { 119 memset(set, 0, sizeof(*set)); 120 } 121 122 static inline void target_sigaddset(target_sigset_t *set, int signum) 123 { 124 signum--; 125 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW); 126 set->sig[signum / TARGET_NSIG_BPW] |= mask; 127 } 128 129 static inline int target_sigismember(const target_sigset_t *set, int signum) 130 { 131 signum--; 132 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW); 133 return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0); 134 } 135 136 static void host_to_target_sigset_internal(target_sigset_t *d, 137 const sigset_t *s) 138 { 139 int i; 140 target_sigemptyset(d); 141 for (i = 1; i <= TARGET_NSIG; i++) { 142 if (sigismember(s, i)) { 143 target_sigaddset(d, host_to_target_signal(i)); 144 } 145 } 146 } 147 148 void host_to_target_sigset(target_sigset_t *d, const sigset_t *s) 149 { 150 target_sigset_t d1; 151 int i; 152 153 host_to_target_sigset_internal(&d1, s); 154 for(i = 0;i < TARGET_NSIG_WORDS; i++) 155 d->sig[i] = tswapal(d1.sig[i]); 156 } 157 158 static void target_to_host_sigset_internal(sigset_t *d, 159 const target_sigset_t *s) 160 { 161 int i; 162 sigemptyset(d); 163 for (i = 1; i <= TARGET_NSIG; i++) { 164 if (target_sigismember(s, i)) { 165 sigaddset(d, target_to_host_signal(i)); 166 } 167 } 168 } 169 170 void target_to_host_sigset(sigset_t *d, const target_sigset_t *s) 171 { 172 target_sigset_t s1; 173 int i; 174 175 for(i = 0;i < TARGET_NSIG_WORDS; i++) 176 s1.sig[i] = tswapal(s->sig[i]); 177 target_to_host_sigset_internal(d, &s1); 178 } 179 180 void host_to_target_old_sigset(abi_ulong *old_sigset, 181 const sigset_t *sigset) 182 { 183 target_sigset_t d; 184 host_to_target_sigset(&d, sigset); 185 *old_sigset = d.sig[0]; 186 } 187 188 void target_to_host_old_sigset(sigset_t *sigset, 189 const abi_ulong *old_sigset) 190 { 191 target_sigset_t d; 192 int i; 193 194 d.sig[0] = *old_sigset; 195 for(i = 1;i < TARGET_NSIG_WORDS; i++) 196 d.sig[i] = 0; 197 target_to_host_sigset(sigset, &d); 198 } 199 200 /* siginfo conversion */ 201 202 static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo, 203 const siginfo_t *info) 204 { 205 int sig; 206 sig = host_to_target_signal(info->si_signo); 207 tinfo->si_signo = sig; 208 tinfo->si_errno = 0; 209 tinfo->si_code = info->si_code; 210 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV || 211 sig == SIGBUS || sig == SIGTRAP) { 212 /* should never come here, but who knows. The information for 213 the target is irrelevant */ 214 tinfo->_sifields._sigfault._addr = 0; 215 } else if (sig == SIGIO) { 216 tinfo->_sifields._sigpoll._fd = info->si_fd; 217 } else if (sig >= TARGET_SIGRTMIN) { 218 tinfo->_sifields._rt._pid = info->si_pid; 219 tinfo->_sifields._rt._uid = info->si_uid; 220 /* XXX: potential problem if 64 bit */ 221 tinfo->_sifields._rt._sigval.sival_ptr = 222 (abi_ulong)(unsigned long)info->si_value.sival_ptr; 223 } 224 } 225 226 static void tswap_siginfo(target_siginfo_t *tinfo, 227 const target_siginfo_t *info) 228 { 229 int sig; 230 sig = info->si_signo; 231 tinfo->si_signo = tswap32(sig); 232 tinfo->si_errno = tswap32(info->si_errno); 233 tinfo->si_code = tswap32(info->si_code); 234 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV || 235 sig == SIGBUS || sig == SIGTRAP) { 236 tinfo->_sifields._sigfault._addr = 237 tswapal(info->_sifields._sigfault._addr); 238 } else if (sig == SIGIO) { 239 tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd); 240 } else if (sig >= TARGET_SIGRTMIN) { 241 tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid); 242 tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid); 243 tinfo->_sifields._rt._sigval.sival_ptr = 244 tswapal(info->_sifields._rt._sigval.sival_ptr); 245 } 246 } 247 248 249 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info) 250 { 251 host_to_target_siginfo_noswap(tinfo, info); 252 tswap_siginfo(tinfo, tinfo); 253 } 254 255 /* XXX: we support only POSIX RT signals are used. */ 256 /* XXX: find a solution for 64 bit (additional malloced data is needed) */ 257 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo) 258 { 259 info->si_signo = tswap32(tinfo->si_signo); 260 info->si_errno = tswap32(tinfo->si_errno); 261 info->si_code = tswap32(tinfo->si_code); 262 info->si_pid = tswap32(tinfo->_sifields._rt._pid); 263 info->si_uid = tswap32(tinfo->_sifields._rt._uid); 264 info->si_value.sival_ptr = 265 (void *)(long)tswapal(tinfo->_sifields._rt._sigval.sival_ptr); 266 } 267 268 static int fatal_signal (int sig) 269 { 270 switch (sig) { 271 case TARGET_SIGCHLD: 272 case TARGET_SIGURG: 273 case TARGET_SIGWINCH: 274 /* Ignored by default. */ 275 return 0; 276 case TARGET_SIGCONT: 277 case TARGET_SIGSTOP: 278 case TARGET_SIGTSTP: 279 case TARGET_SIGTTIN: 280 case TARGET_SIGTTOU: 281 /* Job control signals. */ 282 return 0; 283 default: 284 return 1; 285 } 286 } 287 288 /* returns 1 if given signal should dump core if not handled */ 289 static int core_dump_signal(int sig) 290 { 291 switch (sig) { 292 case TARGET_SIGABRT: 293 case TARGET_SIGFPE: 294 case TARGET_SIGILL: 295 case TARGET_SIGQUIT: 296 case TARGET_SIGSEGV: 297 case TARGET_SIGTRAP: 298 case TARGET_SIGBUS: 299 return (1); 300 default: 301 return (0); 302 } 303 } 304 305 void signal_init(void) 306 { 307 struct sigaction act; 308 struct sigaction oact; 309 int i, j; 310 int host_sig; 311 312 /* generate signal conversion tables */ 313 for(i = 1; i < _NSIG; i++) { 314 if (host_to_target_signal_table[i] == 0) 315 host_to_target_signal_table[i] = i; 316 } 317 for(i = 1; i < _NSIG; i++) { 318 j = host_to_target_signal_table[i]; 319 target_to_host_signal_table[j] = i; 320 } 321 322 /* set all host signal handlers. ALL signals are blocked during 323 the handlers to serialize them. */ 324 memset(sigact_table, 0, sizeof(sigact_table)); 325 326 sigfillset(&act.sa_mask); 327 act.sa_flags = SA_SIGINFO; 328 act.sa_sigaction = host_signal_handler; 329 for(i = 1; i <= TARGET_NSIG; i++) { 330 host_sig = target_to_host_signal(i); 331 sigaction(host_sig, NULL, &oact); 332 if (oact.sa_sigaction == (void *)SIG_IGN) { 333 sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN; 334 } else if (oact.sa_sigaction == (void *)SIG_DFL) { 335 sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL; 336 } 337 /* If there's already a handler installed then something has 338 gone horribly wrong, so don't even try to handle that case. */ 339 /* Install some handlers for our own use. We need at least 340 SIGSEGV and SIGBUS, to detect exceptions. We can not just 341 trap all signals because it affects syscall interrupt 342 behavior. But do trap all default-fatal signals. */ 343 if (fatal_signal (i)) 344 sigaction(host_sig, &act, NULL); 345 } 346 } 347 348 /* signal queue handling */ 349 350 static inline struct sigqueue *alloc_sigqueue(CPUState *env) 351 { 352 TaskState *ts = env->opaque; 353 struct sigqueue *q = ts->first_free; 354 if (!q) 355 return NULL; 356 ts->first_free = q->next; 357 return q; 358 } 359 360 static inline void free_sigqueue(CPUState *env, struct sigqueue *q) 361 { 362 TaskState *ts = env->opaque; 363 q->next = ts->first_free; 364 ts->first_free = q; 365 } 366 367 /* abort execution with signal */ 368 static void QEMU_NORETURN force_sig(int target_sig) 369 { 370 TaskState *ts = (TaskState *)thread_env->opaque; 371 int host_sig, core_dumped = 0; 372 struct sigaction act; 373 host_sig = target_to_host_signal(target_sig); 374 gdb_signalled(thread_env, target_sig); 375 376 /* dump core if supported by target binary format */ 377 if (core_dump_signal(target_sig) && (ts->bprm->core_dump != NULL)) { 378 stop_all_tasks(); 379 core_dumped = 380 ((*ts->bprm->core_dump)(target_sig, thread_env) == 0); 381 } 382 if (core_dumped) { 383 /* we already dumped the core of target process, we don't want 384 * a coredump of qemu itself */ 385 struct rlimit nodump; 386 getrlimit(RLIMIT_CORE, &nodump); 387 nodump.rlim_cur=0; 388 setrlimit(RLIMIT_CORE, &nodump); 389 (void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n", 390 target_sig, strsignal(host_sig), "core dumped" ); 391 } 392 393 /* The proper exit code for dying from an uncaught signal is 394 * -<signal>. The kernel doesn't allow exit() or _exit() to pass 395 * a negative value. To get the proper exit code we need to 396 * actually die from an uncaught signal. Here the default signal 397 * handler is installed, we send ourself a signal and we wait for 398 * it to arrive. */ 399 sigfillset(&act.sa_mask); 400 act.sa_handler = SIG_DFL; 401 sigaction(host_sig, &act, NULL); 402 403 /* For some reason raise(host_sig) doesn't send the signal when 404 * statically linked on x86-64. */ 405 kill(getpid(), host_sig); 406 407 /* Make sure the signal isn't masked (just reuse the mask inside 408 of act) */ 409 sigdelset(&act.sa_mask, host_sig); 410 sigsuspend(&act.sa_mask); 411 412 /* unreachable */ 413 abort(); 414 } 415 416 /* queue a signal so that it will be send to the virtual CPU as soon 417 as possible */ 418 int queue_signal(CPUState *env, int sig, target_siginfo_t *info) 419 { 420 TaskState *ts = env->opaque; 421 struct emulated_sigtable *k; 422 struct sigqueue *q, **pq; 423 abi_ulong handler; 424 int queue; 425 426 #if defined(DEBUG_SIGNAL) 427 fprintf(stderr, "queue_signal: sig=%d\n", 428 sig); 429 #endif 430 k = &ts->sigtab[sig - 1]; 431 queue = gdb_queuesig (); 432 handler = sigact_table[sig - 1]._sa_handler; 433 if (!queue && handler == TARGET_SIG_DFL) { 434 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) { 435 kill(getpid(),SIGSTOP); 436 return 0; 437 } else 438 /* default handler : ignore some signal. The other are fatal */ 439 if (sig != TARGET_SIGCHLD && 440 sig != TARGET_SIGURG && 441 sig != TARGET_SIGWINCH && 442 sig != TARGET_SIGCONT) { 443 force_sig(sig); 444 } else { 445 return 0; /* indicate ignored */ 446 } 447 } else if (!queue && handler == TARGET_SIG_IGN) { 448 /* ignore signal */ 449 return 0; 450 } else if (!queue && handler == TARGET_SIG_ERR) { 451 force_sig(sig); 452 } else { 453 pq = &k->first; 454 if (sig < TARGET_SIGRTMIN) { 455 /* if non real time signal, we queue exactly one signal */ 456 if (!k->pending) 457 q = &k->info; 458 else 459 return 0; 460 } else { 461 if (!k->pending) { 462 /* first signal */ 463 q = &k->info; 464 } else { 465 q = alloc_sigqueue(env); 466 if (!q) 467 return -EAGAIN; 468 while (*pq != NULL) 469 pq = &(*pq)->next; 470 } 471 } 472 *pq = q; 473 q->info = *info; 474 q->next = NULL; 475 k->pending = 1; 476 /* signal that a new signal is pending */ 477 ts->signal_pending = 1; 478 return 1; /* indicates that the signal was queued */ 479 } 480 } 481 482 static void host_signal_handler(int host_signum, siginfo_t *info, 483 void *puc) 484 { 485 int sig; 486 target_siginfo_t tinfo; 487 488 /* the CPU emulator uses some host signals to detect exceptions, 489 we forward to it some signals */ 490 if ((host_signum == SIGSEGV || host_signum == SIGBUS) 491 && info->si_code > 0) { 492 if (cpu_signal_handler(host_signum, info, puc)) 493 return; 494 } 495 496 /* get target signal number */ 497 sig = host_to_target_signal(host_signum); 498 if (sig < 1 || sig > TARGET_NSIG) 499 return; 500 #if defined(DEBUG_SIGNAL) 501 fprintf(stderr, "qemu: got signal %d\n", sig); 502 #endif 503 host_to_target_siginfo_noswap(&tinfo, info); 504 if (queue_signal(thread_env, sig, &tinfo) == 1) { 505 /* interrupt the virtual CPU as soon as possible */ 506 cpu_exit(thread_env); 507 } 508 } 509 510 /* do_sigaltstack() returns target values and errnos. */ 511 /* compare linux/kernel/signal.c:do_sigaltstack() */ 512 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp) 513 { 514 int ret; 515 struct target_sigaltstack oss; 516 517 /* XXX: test errors */ 518 if(uoss_addr) 519 { 520 __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp); 521 __put_user(target_sigaltstack_used.ss_size, &oss.ss_size); 522 __put_user(sas_ss_flags(sp), &oss.ss_flags); 523 } 524 525 if(uss_addr) 526 { 527 struct target_sigaltstack *uss; 528 struct target_sigaltstack ss; 529 530 ret = -TARGET_EFAULT; 531 if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1) 532 || __get_user(ss.ss_sp, &uss->ss_sp) 533 || __get_user(ss.ss_size, &uss->ss_size) 534 || __get_user(ss.ss_flags, &uss->ss_flags)) 535 goto out; 536 unlock_user_struct(uss, uss_addr, 0); 537 538 ret = -TARGET_EPERM; 539 if (on_sig_stack(sp)) 540 goto out; 541 542 ret = -TARGET_EINVAL; 543 if (ss.ss_flags != TARGET_SS_DISABLE 544 && ss.ss_flags != TARGET_SS_ONSTACK 545 && ss.ss_flags != 0) 546 goto out; 547 548 if (ss.ss_flags == TARGET_SS_DISABLE) { 549 ss.ss_size = 0; 550 ss.ss_sp = 0; 551 } else { 552 ret = -TARGET_ENOMEM; 553 if (ss.ss_size < MINSIGSTKSZ) 554 goto out; 555 } 556 557 target_sigaltstack_used.ss_sp = ss.ss_sp; 558 target_sigaltstack_used.ss_size = ss.ss_size; 559 } 560 561 if (uoss_addr) { 562 ret = -TARGET_EFAULT; 563 if (copy_to_user(uoss_addr, &oss, sizeof(oss))) 564 goto out; 565 } 566 567 ret = 0; 568 out: 569 return ret; 570 } 571 572 /* do_sigaction() return host values and errnos */ 573 int do_sigaction(int sig, const struct target_sigaction *act, 574 struct target_sigaction *oact) 575 { 576 struct target_sigaction *k; 577 struct sigaction act1; 578 int host_sig; 579 int ret = 0; 580 581 if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP) 582 return -EINVAL; 583 k = &sigact_table[sig - 1]; 584 #if defined(DEBUG_SIGNAL) 585 fprintf(stderr, "sigaction sig=%d act=0x%p, oact=0x%p\n", 586 sig, act, oact); 587 #endif 588 if (oact) { 589 oact->_sa_handler = tswapal(k->_sa_handler); 590 #if defined(TARGET_MIPS) || defined (TARGET_ALPHA) 591 oact->sa_flags = bswap32(k->sa_flags); 592 #else 593 oact->sa_flags = tswapal(k->sa_flags); 594 #endif 595 #if !defined(TARGET_MIPS) 596 oact->sa_restorer = tswapal(k->sa_restorer); 597 #endif 598 oact->sa_mask = k->sa_mask; 599 } 600 if (act) { 601 /* FIXME: This is not threadsafe. */ 602 k->_sa_handler = tswapal(act->_sa_handler); 603 #if defined(TARGET_MIPS) || defined (TARGET_ALPHA) 604 k->sa_flags = bswap32(act->sa_flags); 605 #else 606 k->sa_flags = tswapal(act->sa_flags); 607 #endif 608 #if !defined(TARGET_MIPS) 609 k->sa_restorer = tswapal(act->sa_restorer); 610 #endif 611 k->sa_mask = act->sa_mask; 612 613 /* we update the host linux signal state */ 614 host_sig = target_to_host_signal(sig); 615 if (host_sig != SIGSEGV && host_sig != SIGBUS) { 616 sigfillset(&act1.sa_mask); 617 act1.sa_flags = SA_SIGINFO; 618 if (k->sa_flags & TARGET_SA_RESTART) 619 act1.sa_flags |= SA_RESTART; 620 /* NOTE: it is important to update the host kernel signal 621 ignore state to avoid getting unexpected interrupted 622 syscalls */ 623 if (k->_sa_handler == TARGET_SIG_IGN) { 624 act1.sa_sigaction = (void *)SIG_IGN; 625 } else if (k->_sa_handler == TARGET_SIG_DFL) { 626 if (fatal_signal (sig)) 627 act1.sa_sigaction = host_signal_handler; 628 else 629 act1.sa_sigaction = (void *)SIG_DFL; 630 } else { 631 act1.sa_sigaction = host_signal_handler; 632 } 633 ret = sigaction(host_sig, &act1, NULL); 634 } 635 } 636 return ret; 637 } 638 639 static inline int copy_siginfo_to_user(target_siginfo_t *tinfo, 640 const target_siginfo_t *info) 641 { 642 tswap_siginfo(tinfo, info); 643 return 0; 644 } 645 646 static inline int current_exec_domain_sig(int sig) 647 { 648 return /* current->exec_domain && current->exec_domain->signal_invmap 649 && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig; 650 } 651 652 #if defined(TARGET_I386) && TARGET_ABI_BITS == 32 653 654 /* from the Linux kernel */ 655 656 struct target_fpreg { 657 uint16_t significand[4]; 658 uint16_t exponent; 659 }; 660 661 struct target_fpxreg { 662 uint16_t significand[4]; 663 uint16_t exponent; 664 uint16_t padding[3]; 665 }; 666 667 struct target_xmmreg { 668 abi_ulong element[4]; 669 }; 670 671 struct target_fpstate { 672 /* Regular FPU environment */ 673 abi_ulong cw; 674 abi_ulong sw; 675 abi_ulong tag; 676 abi_ulong ipoff; 677 abi_ulong cssel; 678 abi_ulong dataoff; 679 abi_ulong datasel; 680 struct target_fpreg _st[8]; 681 uint16_t status; 682 uint16_t magic; /* 0xffff = regular FPU data only */ 683 684 /* FXSR FPU environment */ 685 abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */ 686 abi_ulong mxcsr; 687 abi_ulong reserved; 688 struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ 689 struct target_xmmreg _xmm[8]; 690 abi_ulong padding[56]; 691 }; 692 693 #define X86_FXSR_MAGIC 0x0000 694 695 struct target_sigcontext { 696 uint16_t gs, __gsh; 697 uint16_t fs, __fsh; 698 uint16_t es, __esh; 699 uint16_t ds, __dsh; 700 abi_ulong edi; 701 abi_ulong esi; 702 abi_ulong ebp; 703 abi_ulong esp; 704 abi_ulong ebx; 705 abi_ulong edx; 706 abi_ulong ecx; 707 abi_ulong eax; 708 abi_ulong trapno; 709 abi_ulong err; 710 abi_ulong eip; 711 uint16_t cs, __csh; 712 abi_ulong eflags; 713 abi_ulong esp_at_signal; 714 uint16_t ss, __ssh; 715 abi_ulong fpstate; /* pointer */ 716 abi_ulong oldmask; 717 abi_ulong cr2; 718 }; 719 720 struct target_ucontext { 721 abi_ulong tuc_flags; 722 abi_ulong tuc_link; 723 target_stack_t tuc_stack; 724 struct target_sigcontext tuc_mcontext; 725 target_sigset_t tuc_sigmask; /* mask last for extensibility */ 726 }; 727 728 struct sigframe 729 { 730 abi_ulong pretcode; 731 int sig; 732 struct target_sigcontext sc; 733 struct target_fpstate fpstate; 734 abi_ulong extramask[TARGET_NSIG_WORDS-1]; 735 char retcode[8]; 736 }; 737 738 struct rt_sigframe 739 { 740 abi_ulong pretcode; 741 int sig; 742 abi_ulong pinfo; 743 abi_ulong puc; 744 struct target_siginfo info; 745 struct target_ucontext uc; 746 struct target_fpstate fpstate; 747 char retcode[8]; 748 }; 749 750 /* 751 * Set up a signal frame. 752 */ 753 754 /* XXX: save x87 state */ 755 static int 756 setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate, 757 CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr) 758 { 759 int err = 0; 760 uint16_t magic; 761 762 /* already locked in setup_frame() */ 763 err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs); 764 err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs); 765 err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es); 766 err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds); 767 err |= __put_user(env->regs[R_EDI], &sc->edi); 768 err |= __put_user(env->regs[R_ESI], &sc->esi); 769 err |= __put_user(env->regs[R_EBP], &sc->ebp); 770 err |= __put_user(env->regs[R_ESP], &sc->esp); 771 err |= __put_user(env->regs[R_EBX], &sc->ebx); 772 err |= __put_user(env->regs[R_EDX], &sc->edx); 773 err |= __put_user(env->regs[R_ECX], &sc->ecx); 774 err |= __put_user(env->regs[R_EAX], &sc->eax); 775 err |= __put_user(env->exception_index, &sc->trapno); 776 err |= __put_user(env->error_code, &sc->err); 777 err |= __put_user(env->eip, &sc->eip); 778 err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); 779 err |= __put_user(env->eflags, &sc->eflags); 780 err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal); 781 err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); 782 783 cpu_x86_fsave(env, fpstate_addr, 1); 784 fpstate->status = fpstate->sw; 785 magic = 0xffff; 786 err |= __put_user(magic, &fpstate->magic); 787 err |= __put_user(fpstate_addr, &sc->fpstate); 788 789 /* non-iBCS2 extensions.. */ 790 err |= __put_user(mask, &sc->oldmask); 791 err |= __put_user(env->cr[2], &sc->cr2); 792 return err; 793 } 794 795 /* 796 * Determine which stack to use.. 797 */ 798 799 static inline abi_ulong 800 get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size) 801 { 802 unsigned long esp; 803 804 /* Default to using normal stack */ 805 esp = env->regs[R_ESP]; 806 /* This is the X/Open sanctioned signal stack switching. */ 807 if (ka->sa_flags & TARGET_SA_ONSTACK) { 808 if (sas_ss_flags(esp) == 0) 809 esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 810 } 811 812 /* This is the legacy signal stack switching. */ 813 else 814 if ((env->segs[R_SS].selector & 0xffff) != __USER_DS && 815 !(ka->sa_flags & TARGET_SA_RESTORER) && 816 ka->sa_restorer) { 817 esp = (unsigned long) ka->sa_restorer; 818 } 819 return (esp - frame_size) & -8ul; 820 } 821 822 /* compare linux/arch/i386/kernel/signal.c:setup_frame() */ 823 static void setup_frame(int sig, struct target_sigaction *ka, 824 target_sigset_t *set, CPUX86State *env) 825 { 826 abi_ulong frame_addr; 827 struct sigframe *frame; 828 int i, err = 0; 829 830 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 831 832 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 833 goto give_sigsegv; 834 835 err |= __put_user(current_exec_domain_sig(sig), 836 &frame->sig); 837 if (err) 838 goto give_sigsegv; 839 840 setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0], 841 frame_addr + offsetof(struct sigframe, fpstate)); 842 if (err) 843 goto give_sigsegv; 844 845 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 846 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 847 goto give_sigsegv; 848 } 849 850 /* Set up to return from userspace. If provided, use a stub 851 already in userspace. */ 852 if (ka->sa_flags & TARGET_SA_RESTORER) { 853 err |= __put_user(ka->sa_restorer, &frame->pretcode); 854 } else { 855 uint16_t val16; 856 abi_ulong retcode_addr; 857 retcode_addr = frame_addr + offsetof(struct sigframe, retcode); 858 err |= __put_user(retcode_addr, &frame->pretcode); 859 /* This is popl %eax ; movl $,%eax ; int $0x80 */ 860 val16 = 0xb858; 861 err |= __put_user(val16, (uint16_t *)(frame->retcode+0)); 862 err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); 863 val16 = 0x80cd; 864 err |= __put_user(val16, (uint16_t *)(frame->retcode+6)); 865 } 866 867 if (err) 868 goto give_sigsegv; 869 870 /* Set up registers for signal handler */ 871 env->regs[R_ESP] = frame_addr; 872 env->eip = ka->_sa_handler; 873 874 cpu_x86_load_seg(env, R_DS, __USER_DS); 875 cpu_x86_load_seg(env, R_ES, __USER_DS); 876 cpu_x86_load_seg(env, R_SS, __USER_DS); 877 cpu_x86_load_seg(env, R_CS, __USER_CS); 878 env->eflags &= ~TF_MASK; 879 880 unlock_user_struct(frame, frame_addr, 1); 881 882 return; 883 884 give_sigsegv: 885 unlock_user_struct(frame, frame_addr, 1); 886 if (sig == TARGET_SIGSEGV) 887 ka->_sa_handler = TARGET_SIG_DFL; 888 force_sig(TARGET_SIGSEGV /* , current */); 889 } 890 891 /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */ 892 static void setup_rt_frame(int sig, struct target_sigaction *ka, 893 target_siginfo_t *info, 894 target_sigset_t *set, CPUX86State *env) 895 { 896 abi_ulong frame_addr, addr; 897 struct rt_sigframe *frame; 898 int i, err = 0; 899 900 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 901 902 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 903 goto give_sigsegv; 904 905 err |= __put_user(current_exec_domain_sig(sig), 906 &frame->sig); 907 addr = frame_addr + offsetof(struct rt_sigframe, info); 908 err |= __put_user(addr, &frame->pinfo); 909 addr = frame_addr + offsetof(struct rt_sigframe, uc); 910 err |= __put_user(addr, &frame->puc); 911 err |= copy_siginfo_to_user(&frame->info, info); 912 if (err) 913 goto give_sigsegv; 914 915 /* Create the ucontext. */ 916 err |= __put_user(0, &frame->uc.tuc_flags); 917 err |= __put_user(0, &frame->uc.tuc_link); 918 err |= __put_user(target_sigaltstack_used.ss_sp, 919 &frame->uc.tuc_stack.ss_sp); 920 err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)), 921 &frame->uc.tuc_stack.ss_flags); 922 err |= __put_user(target_sigaltstack_used.ss_size, 923 &frame->uc.tuc_stack.ss_size); 924 err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, 925 env, set->sig[0], 926 frame_addr + offsetof(struct rt_sigframe, fpstate)); 927 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 928 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) 929 goto give_sigsegv; 930 } 931 932 /* Set up to return from userspace. If provided, use a stub 933 already in userspace. */ 934 if (ka->sa_flags & TARGET_SA_RESTORER) { 935 err |= __put_user(ka->sa_restorer, &frame->pretcode); 936 } else { 937 uint16_t val16; 938 addr = frame_addr + offsetof(struct rt_sigframe, retcode); 939 err |= __put_user(addr, &frame->pretcode); 940 /* This is movl $,%eax ; int $0x80 */ 941 err |= __put_user(0xb8, (char *)(frame->retcode+0)); 942 err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); 943 val16 = 0x80cd; 944 err |= __put_user(val16, (uint16_t *)(frame->retcode+5)); 945 } 946 947 if (err) 948 goto give_sigsegv; 949 950 /* Set up registers for signal handler */ 951 env->regs[R_ESP] = frame_addr; 952 env->eip = ka->_sa_handler; 953 954 cpu_x86_load_seg(env, R_DS, __USER_DS); 955 cpu_x86_load_seg(env, R_ES, __USER_DS); 956 cpu_x86_load_seg(env, R_SS, __USER_DS); 957 cpu_x86_load_seg(env, R_CS, __USER_CS); 958 env->eflags &= ~TF_MASK; 959 960 unlock_user_struct(frame, frame_addr, 1); 961 962 return; 963 964 give_sigsegv: 965 unlock_user_struct(frame, frame_addr, 1); 966 if (sig == TARGET_SIGSEGV) 967 ka->_sa_handler = TARGET_SIG_DFL; 968 force_sig(TARGET_SIGSEGV /* , current */); 969 } 970 971 static int 972 restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax) 973 { 974 unsigned int err = 0; 975 abi_ulong fpstate_addr; 976 unsigned int tmpflags; 977 978 cpu_x86_load_seg(env, R_GS, tswap16(sc->gs)); 979 cpu_x86_load_seg(env, R_FS, tswap16(sc->fs)); 980 cpu_x86_load_seg(env, R_ES, tswap16(sc->es)); 981 cpu_x86_load_seg(env, R_DS, tswap16(sc->ds)); 982 983 env->regs[R_EDI] = tswapl(sc->edi); 984 env->regs[R_ESI] = tswapl(sc->esi); 985 env->regs[R_EBP] = tswapl(sc->ebp); 986 env->regs[R_ESP] = tswapl(sc->esp); 987 env->regs[R_EBX] = tswapl(sc->ebx); 988 env->regs[R_EDX] = tswapl(sc->edx); 989 env->regs[R_ECX] = tswapl(sc->ecx); 990 env->eip = tswapl(sc->eip); 991 992 cpu_x86_load_seg(env, R_CS, lduw_p(&sc->cs) | 3); 993 cpu_x86_load_seg(env, R_SS, lduw_p(&sc->ss) | 3); 994 995 tmpflags = tswapl(sc->eflags); 996 env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5); 997 // regs->orig_eax = -1; /* disable syscall checks */ 998 999 fpstate_addr = tswapl(sc->fpstate); 1000 if (fpstate_addr != 0) { 1001 if (!access_ok(VERIFY_READ, fpstate_addr, 1002 sizeof(struct target_fpstate))) 1003 goto badframe; 1004 cpu_x86_frstor(env, fpstate_addr, 1); 1005 } 1006 1007 *peax = tswapl(sc->eax); 1008 return err; 1009 badframe: 1010 return 1; 1011 } 1012 1013 long do_sigreturn(CPUX86State *env) 1014 { 1015 struct sigframe *frame; 1016 abi_ulong frame_addr = env->regs[R_ESP] - 8; 1017 target_sigset_t target_set; 1018 sigset_t set; 1019 int eax, i; 1020 1021 #if defined(DEBUG_SIGNAL) 1022 fprintf(stderr, "do_sigreturn\n"); 1023 #endif 1024 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1025 goto badframe; 1026 /* set blocked signals */ 1027 if (__get_user(target_set.sig[0], &frame->sc.oldmask)) 1028 goto badframe; 1029 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 1030 if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) 1031 goto badframe; 1032 } 1033 1034 target_to_host_sigset_internal(&set, &target_set); 1035 sigprocmask(SIG_SETMASK, &set, NULL); 1036 1037 /* restore registers */ 1038 if (restore_sigcontext(env, &frame->sc, &eax)) 1039 goto badframe; 1040 unlock_user_struct(frame, frame_addr, 0); 1041 return eax; 1042 1043 badframe: 1044 unlock_user_struct(frame, frame_addr, 0); 1045 force_sig(TARGET_SIGSEGV); 1046 return 0; 1047 } 1048 1049 long do_rt_sigreturn(CPUX86State *env) 1050 { 1051 abi_ulong frame_addr; 1052 struct rt_sigframe *frame; 1053 sigset_t set; 1054 int eax; 1055 1056 frame_addr = env->regs[R_ESP] - 4; 1057 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1058 goto badframe; 1059 target_to_host_sigset(&set, &frame->uc.tuc_sigmask); 1060 sigprocmask(SIG_SETMASK, &set, NULL); 1061 1062 if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax)) 1063 goto badframe; 1064 1065 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, 1066 get_sp_from_cpustate(env)) == -EFAULT) 1067 goto badframe; 1068 1069 unlock_user_struct(frame, frame_addr, 0); 1070 return eax; 1071 1072 badframe: 1073 unlock_user_struct(frame, frame_addr, 0); 1074 force_sig(TARGET_SIGSEGV); 1075 return 0; 1076 } 1077 1078 #elif defined(TARGET_ARM) 1079 1080 struct target_sigcontext { 1081 abi_ulong trap_no; 1082 abi_ulong error_code; 1083 abi_ulong oldmask; 1084 abi_ulong arm_r0; 1085 abi_ulong arm_r1; 1086 abi_ulong arm_r2; 1087 abi_ulong arm_r3; 1088 abi_ulong arm_r4; 1089 abi_ulong arm_r5; 1090 abi_ulong arm_r6; 1091 abi_ulong arm_r7; 1092 abi_ulong arm_r8; 1093 abi_ulong arm_r9; 1094 abi_ulong arm_r10; 1095 abi_ulong arm_fp; 1096 abi_ulong arm_ip; 1097 abi_ulong arm_sp; 1098 abi_ulong arm_lr; 1099 abi_ulong arm_pc; 1100 abi_ulong arm_cpsr; 1101 abi_ulong fault_address; 1102 }; 1103 1104 struct target_ucontext_v1 { 1105 abi_ulong tuc_flags; 1106 abi_ulong tuc_link; 1107 target_stack_t tuc_stack; 1108 struct target_sigcontext tuc_mcontext; 1109 target_sigset_t tuc_sigmask; /* mask last for extensibility */ 1110 }; 1111 1112 struct target_ucontext_v2 { 1113 abi_ulong tuc_flags; 1114 abi_ulong tuc_link; 1115 target_stack_t tuc_stack; 1116 struct target_sigcontext tuc_mcontext; 1117 target_sigset_t tuc_sigmask; /* mask last for extensibility */ 1118 char __unused[128 - sizeof(target_sigset_t)]; 1119 abi_ulong tuc_regspace[128] __attribute__((__aligned__(8))); 1120 }; 1121 1122 struct target_user_vfp { 1123 uint64_t fpregs[32]; 1124 abi_ulong fpscr; 1125 }; 1126 1127 struct target_user_vfp_exc { 1128 abi_ulong fpexc; 1129 abi_ulong fpinst; 1130 abi_ulong fpinst2; 1131 }; 1132 1133 struct target_vfp_sigframe { 1134 abi_ulong magic; 1135 abi_ulong size; 1136 struct target_user_vfp ufp; 1137 struct target_user_vfp_exc ufp_exc; 1138 } __attribute__((__aligned__(8))); 1139 1140 struct target_iwmmxt_sigframe { 1141 abi_ulong magic; 1142 abi_ulong size; 1143 uint64_t regs[16]; 1144 /* Note that not all the coprocessor control registers are stored here */ 1145 uint32_t wcssf; 1146 uint32_t wcasf; 1147 uint32_t wcgr0; 1148 uint32_t wcgr1; 1149 uint32_t wcgr2; 1150 uint32_t wcgr3; 1151 } __attribute__((__aligned__(8))); 1152 1153 #define TARGET_VFP_MAGIC 0x56465001 1154 #define TARGET_IWMMXT_MAGIC 0x12ef842a 1155 1156 struct sigframe_v1 1157 { 1158 struct target_sigcontext sc; 1159 abi_ulong extramask[TARGET_NSIG_WORDS-1]; 1160 abi_ulong retcode; 1161 }; 1162 1163 struct sigframe_v2 1164 { 1165 struct target_ucontext_v2 uc; 1166 abi_ulong retcode; 1167 }; 1168 1169 struct rt_sigframe_v1 1170 { 1171 abi_ulong pinfo; 1172 abi_ulong puc; 1173 struct target_siginfo info; 1174 struct target_ucontext_v1 uc; 1175 abi_ulong retcode; 1176 }; 1177 1178 struct rt_sigframe_v2 1179 { 1180 struct target_siginfo info; 1181 struct target_ucontext_v2 uc; 1182 abi_ulong retcode; 1183 }; 1184 1185 #define TARGET_CONFIG_CPU_32 1 1186 1187 /* 1188 * For ARM syscalls, we encode the syscall number into the instruction. 1189 */ 1190 #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) 1191 #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) 1192 1193 /* 1194 * For Thumb syscalls, we pass the syscall number via r7. We therefore 1195 * need two 16-bit instructions. 1196 */ 1197 #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) 1198 #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) 1199 1200 static const abi_ulong retcodes[4] = { 1201 SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, 1202 SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN 1203 }; 1204 1205 1206 #define __get_user_error(x,p,e) __get_user(x, p) 1207 1208 static inline int valid_user_regs(CPUState *regs) 1209 { 1210 return 1; 1211 } 1212 1213 static void 1214 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ 1215 CPUState *env, abi_ulong mask) 1216 { 1217 __put_user(env->regs[0], &sc->arm_r0); 1218 __put_user(env->regs[1], &sc->arm_r1); 1219 __put_user(env->regs[2], &sc->arm_r2); 1220 __put_user(env->regs[3], &sc->arm_r3); 1221 __put_user(env->regs[4], &sc->arm_r4); 1222 __put_user(env->regs[5], &sc->arm_r5); 1223 __put_user(env->regs[6], &sc->arm_r6); 1224 __put_user(env->regs[7], &sc->arm_r7); 1225 __put_user(env->regs[8], &sc->arm_r8); 1226 __put_user(env->regs[9], &sc->arm_r9); 1227 __put_user(env->regs[10], &sc->arm_r10); 1228 __put_user(env->regs[11], &sc->arm_fp); 1229 __put_user(env->regs[12], &sc->arm_ip); 1230 __put_user(env->regs[13], &sc->arm_sp); 1231 __put_user(env->regs[14], &sc->arm_lr); 1232 __put_user(env->regs[15], &sc->arm_pc); 1233 #ifdef TARGET_CONFIG_CPU_32 1234 __put_user(cpsr_read(env), &sc->arm_cpsr); 1235 #endif 1236 1237 __put_user(/* current->thread.trap_no */ 0, &sc->trap_no); 1238 __put_user(/* current->thread.error_code */ 0, &sc->error_code); 1239 __put_user(/* current->thread.address */ 0, &sc->fault_address); 1240 __put_user(mask, &sc->oldmask); 1241 } 1242 1243 static inline abi_ulong 1244 get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize) 1245 { 1246 unsigned long sp = regs->regs[13]; 1247 1248 /* 1249 * This is the X/Open sanctioned signal stack switching. 1250 */ 1251 if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) 1252 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 1253 /* 1254 * ATPCS B01 mandates 8-byte alignment 1255 */ 1256 return (sp - framesize) & ~7; 1257 } 1258 1259 static int 1260 setup_return(CPUState *env, struct target_sigaction *ka, 1261 abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr) 1262 { 1263 abi_ulong handler = ka->_sa_handler; 1264 abi_ulong retcode; 1265 int thumb = handler & 1; 1266 uint32_t cpsr = cpsr_read(env); 1267 1268 cpsr &= ~CPSR_IT; 1269 if (thumb) { 1270 cpsr |= CPSR_T; 1271 } else { 1272 cpsr &= ~CPSR_T; 1273 } 1274 1275 if (ka->sa_flags & TARGET_SA_RESTORER) { 1276 retcode = ka->sa_restorer; 1277 } else { 1278 unsigned int idx = thumb; 1279 1280 if (ka->sa_flags & TARGET_SA_SIGINFO) 1281 idx += 2; 1282 1283 if (__put_user(retcodes[idx], rc)) 1284 return 1; 1285 1286 retcode = rc_addr + thumb; 1287 } 1288 1289 env->regs[0] = usig; 1290 env->regs[13] = frame_addr; 1291 env->regs[14] = retcode; 1292 env->regs[15] = handler & (thumb ? ~1 : ~3); 1293 cpsr_write(env, cpsr, 0xffffffff); 1294 1295 return 0; 1296 } 1297 1298 static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUState *env) 1299 { 1300 int i; 1301 struct target_vfp_sigframe *vfpframe; 1302 vfpframe = (struct target_vfp_sigframe *)regspace; 1303 __put_user(TARGET_VFP_MAGIC, &vfpframe->magic); 1304 __put_user(sizeof(*vfpframe), &vfpframe->size); 1305 for (i = 0; i < 32; i++) { 1306 __put_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]); 1307 } 1308 __put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr); 1309 __put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc); 1310 __put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst); 1311 __put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2); 1312 return (abi_ulong*)(vfpframe+1); 1313 } 1314 1315 static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace, CPUState *env) 1316 { 1317 int i; 1318 struct target_iwmmxt_sigframe *iwmmxtframe; 1319 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace; 1320 __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic); 1321 __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size); 1322 for (i = 0; i < 16; i++) { 1323 __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]); 1324 } 1325 __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf); 1326 __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf); 1327 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0); 1328 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1); 1329 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2); 1330 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3); 1331 return (abi_ulong*)(iwmmxtframe+1); 1332 } 1333 1334 static void setup_sigframe_v2(struct target_ucontext_v2 *uc, 1335 target_sigset_t *set, CPUState *env) 1336 { 1337 struct target_sigaltstack stack; 1338 int i; 1339 abi_ulong *regspace; 1340 1341 /* Clear all the bits of the ucontext we don't use. */ 1342 memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); 1343 1344 memset(&stack, 0, sizeof(stack)); 1345 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); 1346 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); 1347 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); 1348 memcpy(&uc->tuc_stack, &stack, sizeof(stack)); 1349 1350 setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]); 1351 /* Save coprocessor signal frame. */ 1352 regspace = uc->tuc_regspace; 1353 if (arm_feature(env, ARM_FEATURE_VFP)) { 1354 regspace = setup_sigframe_v2_vfp(regspace, env); 1355 } 1356 if (arm_feature(env, ARM_FEATURE_IWMMXT)) { 1357 regspace = setup_sigframe_v2_iwmmxt(regspace, env); 1358 } 1359 1360 /* Write terminating magic word */ 1361 __put_user(0, regspace); 1362 1363 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 1364 __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]); 1365 } 1366 } 1367 1368 /* compare linux/arch/arm/kernel/signal.c:setup_frame() */ 1369 static void setup_frame_v1(int usig, struct target_sigaction *ka, 1370 target_sigset_t *set, CPUState *regs) 1371 { 1372 struct sigframe_v1 *frame; 1373 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); 1374 int i; 1375 1376 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 1377 return; 1378 1379 setup_sigcontext(&frame->sc, regs, set->sig[0]); 1380 1381 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 1382 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 1383 goto end; 1384 } 1385 1386 setup_return(regs, ka, &frame->retcode, frame_addr, usig, 1387 frame_addr + offsetof(struct sigframe_v1, retcode)); 1388 1389 end: 1390 unlock_user_struct(frame, frame_addr, 1); 1391 } 1392 1393 static void setup_frame_v2(int usig, struct target_sigaction *ka, 1394 target_sigset_t *set, CPUState *regs) 1395 { 1396 struct sigframe_v2 *frame; 1397 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); 1398 1399 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 1400 return; 1401 1402 setup_sigframe_v2(&frame->uc, set, regs); 1403 1404 setup_return(regs, ka, &frame->retcode, frame_addr, usig, 1405 frame_addr + offsetof(struct sigframe_v2, retcode)); 1406 1407 unlock_user_struct(frame, frame_addr, 1); 1408 } 1409 1410 static void setup_frame(int usig, struct target_sigaction *ka, 1411 target_sigset_t *set, CPUState *regs) 1412 { 1413 if (get_osversion() >= 0x020612) { 1414 setup_frame_v2(usig, ka, set, regs); 1415 } else { 1416 setup_frame_v1(usig, ka, set, regs); 1417 } 1418 } 1419 1420 /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */ 1421 static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, 1422 target_siginfo_t *info, 1423 target_sigset_t *set, CPUState *env) 1424 { 1425 struct rt_sigframe_v1 *frame; 1426 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); 1427 struct target_sigaltstack stack; 1428 int i; 1429 abi_ulong info_addr, uc_addr; 1430 1431 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 1432 return /* 1 */; 1433 1434 info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info); 1435 __put_user(info_addr, &frame->pinfo); 1436 uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc); 1437 __put_user(uc_addr, &frame->puc); 1438 copy_siginfo_to_user(&frame->info, info); 1439 1440 /* Clear all the bits of the ucontext we don't use. */ 1441 memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext)); 1442 1443 memset(&stack, 0, sizeof(stack)); 1444 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); 1445 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); 1446 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); 1447 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack)); 1448 1449 setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]); 1450 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 1451 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) 1452 goto end; 1453 } 1454 1455 setup_return(env, ka, &frame->retcode, frame_addr, usig, 1456 frame_addr + offsetof(struct rt_sigframe_v1, retcode)); 1457 1458 env->regs[1] = info_addr; 1459 env->regs[2] = uc_addr; 1460 1461 end: 1462 unlock_user_struct(frame, frame_addr, 1); 1463 } 1464 1465 static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, 1466 target_siginfo_t *info, 1467 target_sigset_t *set, CPUState *env) 1468 { 1469 struct rt_sigframe_v2 *frame; 1470 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); 1471 abi_ulong info_addr, uc_addr; 1472 1473 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 1474 return /* 1 */; 1475 1476 info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info); 1477 uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc); 1478 copy_siginfo_to_user(&frame->info, info); 1479 1480 setup_sigframe_v2(&frame->uc, set, env); 1481 1482 setup_return(env, ka, &frame->retcode, frame_addr, usig, 1483 frame_addr + offsetof(struct rt_sigframe_v2, retcode)); 1484 1485 env->regs[1] = info_addr; 1486 env->regs[2] = uc_addr; 1487 1488 unlock_user_struct(frame, frame_addr, 1); 1489 } 1490 1491 static void setup_rt_frame(int usig, struct target_sigaction *ka, 1492 target_siginfo_t *info, 1493 target_sigset_t *set, CPUState *env) 1494 { 1495 if (get_osversion() >= 0x020612) { 1496 setup_rt_frame_v2(usig, ka, info, set, env); 1497 } else { 1498 setup_rt_frame_v1(usig, ka, info, set, env); 1499 } 1500 } 1501 1502 static int 1503 restore_sigcontext(CPUState *env, struct target_sigcontext *sc) 1504 { 1505 int err = 0; 1506 uint32_t cpsr; 1507 1508 __get_user_error(env->regs[0], &sc->arm_r0, err); 1509 __get_user_error(env->regs[1], &sc->arm_r1, err); 1510 __get_user_error(env->regs[2], &sc->arm_r2, err); 1511 __get_user_error(env->regs[3], &sc->arm_r3, err); 1512 __get_user_error(env->regs[4], &sc->arm_r4, err); 1513 __get_user_error(env->regs[5], &sc->arm_r5, err); 1514 __get_user_error(env->regs[6], &sc->arm_r6, err); 1515 __get_user_error(env->regs[7], &sc->arm_r7, err); 1516 __get_user_error(env->regs[8], &sc->arm_r8, err); 1517 __get_user_error(env->regs[9], &sc->arm_r9, err); 1518 __get_user_error(env->regs[10], &sc->arm_r10, err); 1519 __get_user_error(env->regs[11], &sc->arm_fp, err); 1520 __get_user_error(env->regs[12], &sc->arm_ip, err); 1521 __get_user_error(env->regs[13], &sc->arm_sp, err); 1522 __get_user_error(env->regs[14], &sc->arm_lr, err); 1523 __get_user_error(env->regs[15], &sc->arm_pc, err); 1524 #ifdef TARGET_CONFIG_CPU_32 1525 __get_user_error(cpsr, &sc->arm_cpsr, err); 1526 cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC); 1527 #endif 1528 1529 err |= !valid_user_regs(env); 1530 1531 return err; 1532 } 1533 1534 static long do_sigreturn_v1(CPUState *env) 1535 { 1536 abi_ulong frame_addr; 1537 struct sigframe_v1 *frame; 1538 target_sigset_t set; 1539 sigset_t host_set; 1540 int i; 1541 1542 /* 1543 * Since we stacked the signal on a 64-bit boundary, 1544 * then 'sp' should be word aligned here. If it's 1545 * not, then the user is trying to mess with us. 1546 */ 1547 if (env->regs[13] & 7) 1548 goto badframe; 1549 1550 frame_addr = env->regs[13]; 1551 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1552 goto badframe; 1553 1554 if (__get_user(set.sig[0], &frame->sc.oldmask)) 1555 goto badframe; 1556 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 1557 if (__get_user(set.sig[i], &frame->extramask[i - 1])) 1558 goto badframe; 1559 } 1560 1561 target_to_host_sigset_internal(&host_set, &set); 1562 sigprocmask(SIG_SETMASK, &host_set, NULL); 1563 1564 if (restore_sigcontext(env, &frame->sc)) 1565 goto badframe; 1566 1567 #if 0 1568 /* Send SIGTRAP if we're single-stepping */ 1569 if (ptrace_cancel_bpt(current)) 1570 send_sig(SIGTRAP, current, 1); 1571 #endif 1572 unlock_user_struct(frame, frame_addr, 0); 1573 return env->regs[0]; 1574 1575 badframe: 1576 unlock_user_struct(frame, frame_addr, 0); 1577 force_sig(TARGET_SIGSEGV /* , current */); 1578 return 0; 1579 } 1580 1581 static abi_ulong *restore_sigframe_v2_vfp(CPUState *env, abi_ulong *regspace) 1582 { 1583 int i; 1584 abi_ulong magic, sz; 1585 uint32_t fpscr, fpexc; 1586 struct target_vfp_sigframe *vfpframe; 1587 vfpframe = (struct target_vfp_sigframe *)regspace; 1588 1589 __get_user(magic, &vfpframe->magic); 1590 __get_user(sz, &vfpframe->size); 1591 if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) { 1592 return 0; 1593 } 1594 for (i = 0; i < 32; i++) { 1595 __get_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]); 1596 } 1597 __get_user(fpscr, &vfpframe->ufp.fpscr); 1598 vfp_set_fpscr(env, fpscr); 1599 __get_user(fpexc, &vfpframe->ufp_exc.fpexc); 1600 /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid 1601 * and the exception flag is cleared 1602 */ 1603 fpexc |= (1 << 30); 1604 fpexc &= ~((1 << 31) | (1 << 28)); 1605 env->vfp.xregs[ARM_VFP_FPEXC] = fpexc; 1606 __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst); 1607 __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2); 1608 return (abi_ulong*)(vfpframe + 1); 1609 } 1610 1611 static abi_ulong *restore_sigframe_v2_iwmmxt(CPUState *env, abi_ulong *regspace) 1612 { 1613 int i; 1614 abi_ulong magic, sz; 1615 struct target_iwmmxt_sigframe *iwmmxtframe; 1616 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace; 1617 1618 __get_user(magic, &iwmmxtframe->magic); 1619 __get_user(sz, &iwmmxtframe->size); 1620 if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) { 1621 return 0; 1622 } 1623 for (i = 0; i < 16; i++) { 1624 __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]); 1625 } 1626 __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf); 1627 __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf); 1628 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0); 1629 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1); 1630 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2); 1631 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3); 1632 return (abi_ulong*)(iwmmxtframe + 1); 1633 } 1634 1635 static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr, 1636 struct target_ucontext_v2 *uc) 1637 { 1638 sigset_t host_set; 1639 abi_ulong *regspace; 1640 1641 target_to_host_sigset(&host_set, &uc->tuc_sigmask); 1642 sigprocmask(SIG_SETMASK, &host_set, NULL); 1643 1644 if (restore_sigcontext(env, &uc->tuc_mcontext)) 1645 return 1; 1646 1647 /* Restore coprocessor signal frame */ 1648 regspace = uc->tuc_regspace; 1649 if (arm_feature(env, ARM_FEATURE_VFP)) { 1650 regspace = restore_sigframe_v2_vfp(env, regspace); 1651 if (!regspace) { 1652 return 1; 1653 } 1654 } 1655 if (arm_feature(env, ARM_FEATURE_IWMMXT)) { 1656 regspace = restore_sigframe_v2_iwmmxt(env, regspace); 1657 if (!regspace) { 1658 return 1; 1659 } 1660 } 1661 1662 if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) 1663 return 1; 1664 1665 #if 0 1666 /* Send SIGTRAP if we're single-stepping */ 1667 if (ptrace_cancel_bpt(current)) 1668 send_sig(SIGTRAP, current, 1); 1669 #endif 1670 1671 return 0; 1672 } 1673 1674 static long do_sigreturn_v2(CPUState *env) 1675 { 1676 abi_ulong frame_addr; 1677 struct sigframe_v2 *frame; 1678 1679 /* 1680 * Since we stacked the signal on a 64-bit boundary, 1681 * then 'sp' should be word aligned here. If it's 1682 * not, then the user is trying to mess with us. 1683 */ 1684 if (env->regs[13] & 7) 1685 goto badframe; 1686 1687 frame_addr = env->regs[13]; 1688 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1689 goto badframe; 1690 1691 if (do_sigframe_return_v2(env, frame_addr, &frame->uc)) 1692 goto badframe; 1693 1694 unlock_user_struct(frame, frame_addr, 0); 1695 return env->regs[0]; 1696 1697 badframe: 1698 unlock_user_struct(frame, frame_addr, 0); 1699 force_sig(TARGET_SIGSEGV /* , current */); 1700 return 0; 1701 } 1702 1703 long do_sigreturn(CPUState *env) 1704 { 1705 if (get_osversion() >= 0x020612) { 1706 return do_sigreturn_v2(env); 1707 } else { 1708 return do_sigreturn_v1(env); 1709 } 1710 } 1711 1712 static long do_rt_sigreturn_v1(CPUState *env) 1713 { 1714 abi_ulong frame_addr; 1715 struct rt_sigframe_v1 *frame; 1716 sigset_t host_set; 1717 1718 /* 1719 * Since we stacked the signal on a 64-bit boundary, 1720 * then 'sp' should be word aligned here. If it's 1721 * not, then the user is trying to mess with us. 1722 */ 1723 if (env->regs[13] & 7) 1724 goto badframe; 1725 1726 frame_addr = env->regs[13]; 1727 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1728 goto badframe; 1729 1730 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); 1731 sigprocmask(SIG_SETMASK, &host_set, NULL); 1732 1733 if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) 1734 goto badframe; 1735 1736 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) 1737 goto badframe; 1738 1739 #if 0 1740 /* Send SIGTRAP if we're single-stepping */ 1741 if (ptrace_cancel_bpt(current)) 1742 send_sig(SIGTRAP, current, 1); 1743 #endif 1744 unlock_user_struct(frame, frame_addr, 0); 1745 return env->regs[0]; 1746 1747 badframe: 1748 unlock_user_struct(frame, frame_addr, 0); 1749 force_sig(TARGET_SIGSEGV /* , current */); 1750 return 0; 1751 } 1752 1753 static long do_rt_sigreturn_v2(CPUState *env) 1754 { 1755 abi_ulong frame_addr; 1756 struct rt_sigframe_v2 *frame; 1757 1758 /* 1759 * Since we stacked the signal on a 64-bit boundary, 1760 * then 'sp' should be word aligned here. If it's 1761 * not, then the user is trying to mess with us. 1762 */ 1763 if (env->regs[13] & 7) 1764 goto badframe; 1765 1766 frame_addr = env->regs[13]; 1767 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1768 goto badframe; 1769 1770 if (do_sigframe_return_v2(env, frame_addr, &frame->uc)) 1771 goto badframe; 1772 1773 unlock_user_struct(frame, frame_addr, 0); 1774 return env->regs[0]; 1775 1776 badframe: 1777 unlock_user_struct(frame, frame_addr, 0); 1778 force_sig(TARGET_SIGSEGV /* , current */); 1779 return 0; 1780 } 1781 1782 long do_rt_sigreturn(CPUState *env) 1783 { 1784 if (get_osversion() >= 0x020612) { 1785 return do_rt_sigreturn_v2(env); 1786 } else { 1787 return do_rt_sigreturn_v1(env); 1788 } 1789 } 1790 1791 #elif defined(TARGET_SPARC) 1792 1793 #define __SUNOS_MAXWIN 31 1794 1795 /* This is what SunOS does, so shall I. */ 1796 struct target_sigcontext { 1797 abi_ulong sigc_onstack; /* state to restore */ 1798 1799 abi_ulong sigc_mask; /* sigmask to restore */ 1800 abi_ulong sigc_sp; /* stack pointer */ 1801 abi_ulong sigc_pc; /* program counter */ 1802 abi_ulong sigc_npc; /* next program counter */ 1803 abi_ulong sigc_psr; /* for condition codes etc */ 1804 abi_ulong sigc_g1; /* User uses these two registers */ 1805 abi_ulong sigc_o0; /* within the trampoline code. */ 1806 1807 /* Now comes information regarding the users window set 1808 * at the time of the signal. 1809 */ 1810 abi_ulong sigc_oswins; /* outstanding windows */ 1811 1812 /* stack ptrs for each regwin buf */ 1813 char *sigc_spbuf[__SUNOS_MAXWIN]; 1814 1815 /* Windows to restore after signal */ 1816 struct { 1817 abi_ulong locals[8]; 1818 abi_ulong ins[8]; 1819 } sigc_wbuf[__SUNOS_MAXWIN]; 1820 }; 1821 /* A Sparc stack frame */ 1822 struct sparc_stackf { 1823 abi_ulong locals[8]; 1824 abi_ulong ins[8]; 1825 /* It's simpler to treat fp and callers_pc as elements of ins[] 1826 * since we never need to access them ourselves. 1827 */ 1828 char *structptr; 1829 abi_ulong xargs[6]; 1830 abi_ulong xxargs[1]; 1831 }; 1832 1833 typedef struct { 1834 struct { 1835 abi_ulong psr; 1836 abi_ulong pc; 1837 abi_ulong npc; 1838 abi_ulong y; 1839 abi_ulong u_regs[16]; /* globals and ins */ 1840 } si_regs; 1841 int si_mask; 1842 } __siginfo_t; 1843 1844 typedef struct { 1845 unsigned long si_float_regs [32]; 1846 unsigned long si_fsr; 1847 unsigned long si_fpqdepth; 1848 struct { 1849 unsigned long *insn_addr; 1850 unsigned long insn; 1851 } si_fpqueue [16]; 1852 } qemu_siginfo_fpu_t; 1853 1854 1855 struct target_signal_frame { 1856 struct sparc_stackf ss; 1857 __siginfo_t info; 1858 abi_ulong fpu_save; 1859 abi_ulong insns[2] __attribute__ ((aligned (8))); 1860 abi_ulong extramask[TARGET_NSIG_WORDS - 1]; 1861 abi_ulong extra_size; /* Should be 0 */ 1862 qemu_siginfo_fpu_t fpu_state; 1863 }; 1864 struct target_rt_signal_frame { 1865 struct sparc_stackf ss; 1866 siginfo_t info; 1867 abi_ulong regs[20]; 1868 sigset_t mask; 1869 abi_ulong fpu_save; 1870 unsigned int insns[2]; 1871 stack_t stack; 1872 unsigned int extra_size; /* Should be 0 */ 1873 qemu_siginfo_fpu_t fpu_state; 1874 }; 1875 1876 #define UREG_O0 16 1877 #define UREG_O6 22 1878 #define UREG_I0 0 1879 #define UREG_I1 1 1880 #define UREG_I2 2 1881 #define UREG_I3 3 1882 #define UREG_I4 4 1883 #define UREG_I5 5 1884 #define UREG_I6 6 1885 #define UREG_I7 7 1886 #define UREG_L0 8 1887 #define UREG_FP UREG_I6 1888 #define UREG_SP UREG_O6 1889 1890 static inline abi_ulong get_sigframe(struct target_sigaction *sa, 1891 CPUState *env, unsigned long framesize) 1892 { 1893 abi_ulong sp; 1894 1895 sp = env->regwptr[UREG_FP]; 1896 1897 /* This is the X/Open sanctioned signal stack switching. */ 1898 if (sa->sa_flags & TARGET_SA_ONSTACK) { 1899 if (!on_sig_stack(sp) 1900 && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7)) 1901 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 1902 } 1903 return sp - framesize; 1904 } 1905 1906 static int 1907 setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask) 1908 { 1909 int err = 0, i; 1910 1911 err |= __put_user(env->psr, &si->si_regs.psr); 1912 err |= __put_user(env->pc, &si->si_regs.pc); 1913 err |= __put_user(env->npc, &si->si_regs.npc); 1914 err |= __put_user(env->y, &si->si_regs.y); 1915 for (i=0; i < 8; i++) { 1916 err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]); 1917 } 1918 for (i=0; i < 8; i++) { 1919 err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]); 1920 } 1921 err |= __put_user(mask, &si->si_mask); 1922 return err; 1923 } 1924 1925 #if 0 1926 static int 1927 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ 1928 CPUState *env, unsigned long mask) 1929 { 1930 int err = 0; 1931 1932 err |= __put_user(mask, &sc->sigc_mask); 1933 err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp); 1934 err |= __put_user(env->pc, &sc->sigc_pc); 1935 err |= __put_user(env->npc, &sc->sigc_npc); 1936 err |= __put_user(env->psr, &sc->sigc_psr); 1937 err |= __put_user(env->gregs[1], &sc->sigc_g1); 1938 err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0); 1939 1940 return err; 1941 } 1942 #endif 1943 #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) 1944 1945 static void setup_frame(int sig, struct target_sigaction *ka, 1946 target_sigset_t *set, CPUState *env) 1947 { 1948 abi_ulong sf_addr; 1949 struct target_signal_frame *sf; 1950 int sigframe_size, err, i; 1951 1952 /* 1. Make sure everything is clean */ 1953 //synchronize_user_stack(); 1954 1955 sigframe_size = NF_ALIGNEDSZ; 1956 sf_addr = get_sigframe(ka, env, sigframe_size); 1957 1958 sf = lock_user(VERIFY_WRITE, sf_addr, 1959 sizeof(struct target_signal_frame), 0); 1960 if (!sf) 1961 goto sigsegv; 1962 1963 //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]); 1964 #if 0 1965 if (invalid_frame_pointer(sf, sigframe_size)) 1966 goto sigill_and_return; 1967 #endif 1968 /* 2. Save the current process state */ 1969 err = setup___siginfo(&sf->info, env, set->sig[0]); 1970 err |= __put_user(0, &sf->extra_size); 1971 1972 //err |= save_fpu_state(regs, &sf->fpu_state); 1973 //err |= __put_user(&sf->fpu_state, &sf->fpu_save); 1974 1975 err |= __put_user(set->sig[0], &sf->info.si_mask); 1976 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { 1977 err |= __put_user(set->sig[i + 1], &sf->extramask[i]); 1978 } 1979 1980 for (i = 0; i < 8; i++) { 1981 err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); 1982 } 1983 for (i = 0; i < 8; i++) { 1984 err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); 1985 } 1986 if (err) 1987 goto sigsegv; 1988 1989 /* 3. signal handler back-trampoline and parameters */ 1990 env->regwptr[UREG_FP] = sf_addr; 1991 env->regwptr[UREG_I0] = sig; 1992 env->regwptr[UREG_I1] = sf_addr + 1993 offsetof(struct target_signal_frame, info); 1994 env->regwptr[UREG_I2] = sf_addr + 1995 offsetof(struct target_signal_frame, info); 1996 1997 /* 4. signal handler */ 1998 env->pc = ka->_sa_handler; 1999 env->npc = (env->pc + 4); 2000 /* 5. return to kernel instructions */ 2001 if (ka->sa_restorer) 2002 env->regwptr[UREG_I7] = ka->sa_restorer; 2003 else { 2004 uint32_t val32; 2005 2006 env->regwptr[UREG_I7] = sf_addr + 2007 offsetof(struct target_signal_frame, insns) - 2 * 4; 2008 2009 /* mov __NR_sigreturn, %g1 */ 2010 val32 = 0x821020d8; 2011 err |= __put_user(val32, &sf->insns[0]); 2012 2013 /* t 0x10 */ 2014 val32 = 0x91d02010; 2015 err |= __put_user(val32, &sf->insns[1]); 2016 if (err) 2017 goto sigsegv; 2018 2019 /* Flush instruction space. */ 2020 //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0])); 2021 // tb_flush(env); 2022 } 2023 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); 2024 return; 2025 #if 0 2026 sigill_and_return: 2027 force_sig(TARGET_SIGILL); 2028 #endif 2029 sigsegv: 2030 //fprintf(stderr, "force_sig\n"); 2031 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); 2032 force_sig(TARGET_SIGSEGV); 2033 } 2034 static inline int 2035 restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu) 2036 { 2037 int err; 2038 #if 0 2039 #ifdef CONFIG_SMP 2040 if (current->flags & PF_USEDFPU) 2041 regs->psr &= ~PSR_EF; 2042 #else 2043 if (current == last_task_used_math) { 2044 last_task_used_math = 0; 2045 regs->psr &= ~PSR_EF; 2046 } 2047 #endif 2048 current->used_math = 1; 2049 current->flags &= ~PF_USEDFPU; 2050 #endif 2051 #if 0 2052 if (verify_area (VERIFY_READ, fpu, sizeof(*fpu))) 2053 return -EFAULT; 2054 #endif 2055 2056 #if 0 2057 /* XXX: incorrect */ 2058 err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0], 2059 (sizeof(unsigned long) * 32)); 2060 #endif 2061 err |= __get_user(env->fsr, &fpu->si_fsr); 2062 #if 0 2063 err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth); 2064 if (current->thread.fpqdepth != 0) 2065 err |= __copy_from_user(¤t->thread.fpqueue[0], 2066 &fpu->si_fpqueue[0], 2067 ((sizeof(unsigned long) + 2068 (sizeof(unsigned long *)))*16)); 2069 #endif 2070 return err; 2071 } 2072 2073 2074 static void setup_rt_frame(int sig, struct target_sigaction *ka, 2075 target_siginfo_t *info, 2076 target_sigset_t *set, CPUState *env) 2077 { 2078 fprintf(stderr, "setup_rt_frame: not implemented\n"); 2079 } 2080 2081 long do_sigreturn(CPUState *env) 2082 { 2083 abi_ulong sf_addr; 2084 struct target_signal_frame *sf; 2085 uint32_t up_psr, pc, npc; 2086 target_sigset_t set; 2087 sigset_t host_set; 2088 int err, i; 2089 2090 sf_addr = env->regwptr[UREG_FP]; 2091 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) 2092 goto segv_and_exit; 2093 #if 0 2094 fprintf(stderr, "sigreturn\n"); 2095 fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]); 2096 #endif 2097 //cpu_dump_state(env, stderr, fprintf, 0); 2098 2099 /* 1. Make sure we are not getting garbage from the user */ 2100 2101 if (sf_addr & 3) 2102 goto segv_and_exit; 2103 2104 err = __get_user(pc, &sf->info.si_regs.pc); 2105 err |= __get_user(npc, &sf->info.si_regs.npc); 2106 2107 if ((pc | npc) & 3) 2108 goto segv_and_exit; 2109 2110 /* 2. Restore the state */ 2111 err |= __get_user(up_psr, &sf->info.si_regs.psr); 2112 2113 /* User can only change condition codes and FPU enabling in %psr. */ 2114 env->psr = (up_psr & (PSR_ICC /* | PSR_EF */)) 2115 | (env->psr & ~(PSR_ICC /* | PSR_EF */)); 2116 2117 env->pc = pc; 2118 env->npc = npc; 2119 err |= __get_user(env->y, &sf->info.si_regs.y); 2120 for (i=0; i < 8; i++) { 2121 err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); 2122 } 2123 for (i=0; i < 8; i++) { 2124 err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]); 2125 } 2126 2127 /* FIXME: implement FPU save/restore: 2128 * __get_user(fpu_save, &sf->fpu_save); 2129 * if (fpu_save) 2130 * err |= restore_fpu_state(env, fpu_save); 2131 */ 2132 2133 /* This is pretty much atomic, no amount locking would prevent 2134 * the races which exist anyways. 2135 */ 2136 err |= __get_user(set.sig[0], &sf->info.si_mask); 2137 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 2138 err |= (__get_user(set.sig[i], &sf->extramask[i - 1])); 2139 } 2140 2141 target_to_host_sigset_internal(&host_set, &set); 2142 sigprocmask(SIG_SETMASK, &host_set, NULL); 2143 2144 if (err) 2145 goto segv_and_exit; 2146 unlock_user_struct(sf, sf_addr, 0); 2147 return env->regwptr[0]; 2148 2149 segv_and_exit: 2150 unlock_user_struct(sf, sf_addr, 0); 2151 force_sig(TARGET_SIGSEGV); 2152 } 2153 2154 long do_rt_sigreturn(CPUState *env) 2155 { 2156 fprintf(stderr, "do_rt_sigreturn: not implemented\n"); 2157 return -TARGET_ENOSYS; 2158 } 2159 2160 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 2161 #define MC_TSTATE 0 2162 #define MC_PC 1 2163 #define MC_NPC 2 2164 #define MC_Y 3 2165 #define MC_G1 4 2166 #define MC_G2 5 2167 #define MC_G3 6 2168 #define MC_G4 7 2169 #define MC_G5 8 2170 #define MC_G6 9 2171 #define MC_G7 10 2172 #define MC_O0 11 2173 #define MC_O1 12 2174 #define MC_O2 13 2175 #define MC_O3 14 2176 #define MC_O4 15 2177 #define MC_O5 16 2178 #define MC_O6 17 2179 #define MC_O7 18 2180 #define MC_NGREG 19 2181 2182 typedef abi_ulong target_mc_greg_t; 2183 typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG]; 2184 2185 struct target_mc_fq { 2186 abi_ulong *mcfq_addr; 2187 uint32_t mcfq_insn; 2188 }; 2189 2190 struct target_mc_fpu { 2191 union { 2192 uint32_t sregs[32]; 2193 uint64_t dregs[32]; 2194 //uint128_t qregs[16]; 2195 } mcfpu_fregs; 2196 abi_ulong mcfpu_fsr; 2197 abi_ulong mcfpu_fprs; 2198 abi_ulong mcfpu_gsr; 2199 struct target_mc_fq *mcfpu_fq; 2200 unsigned char mcfpu_qcnt; 2201 unsigned char mcfpu_qentsz; 2202 unsigned char mcfpu_enab; 2203 }; 2204 typedef struct target_mc_fpu target_mc_fpu_t; 2205 2206 typedef struct { 2207 target_mc_gregset_t mc_gregs; 2208 target_mc_greg_t mc_fp; 2209 target_mc_greg_t mc_i7; 2210 target_mc_fpu_t mc_fpregs; 2211 } target_mcontext_t; 2212 2213 struct target_ucontext { 2214 struct target_ucontext *tuc_link; 2215 abi_ulong tuc_flags; 2216 target_sigset_t tuc_sigmask; 2217 target_mcontext_t tuc_mcontext; 2218 }; 2219 2220 /* A V9 register window */ 2221 struct target_reg_window { 2222 abi_ulong locals[8]; 2223 abi_ulong ins[8]; 2224 }; 2225 2226 #define TARGET_STACK_BIAS 2047 2227 2228 /* {set, get}context() needed for 64-bit SparcLinux userland. */ 2229 void sparc64_set_context(CPUSPARCState *env) 2230 { 2231 abi_ulong ucp_addr; 2232 struct target_ucontext *ucp; 2233 target_mc_gregset_t *grp; 2234 abi_ulong pc, npc, tstate; 2235 abi_ulong fp, i7, w_addr; 2236 int err; 2237 unsigned int i; 2238 2239 ucp_addr = env->regwptr[UREG_I0]; 2240 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) 2241 goto do_sigsegv; 2242 grp = &ucp->tuc_mcontext.mc_gregs; 2243 err = __get_user(pc, &((*grp)[MC_PC])); 2244 err |= __get_user(npc, &((*grp)[MC_NPC])); 2245 if (err || ((pc | npc) & 3)) 2246 goto do_sigsegv; 2247 if (env->regwptr[UREG_I1]) { 2248 target_sigset_t target_set; 2249 sigset_t set; 2250 2251 if (TARGET_NSIG_WORDS == 1) { 2252 if (__get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0])) 2253 goto do_sigsegv; 2254 } else { 2255 abi_ulong *src, *dst; 2256 src = ucp->tuc_sigmask.sig; 2257 dst = target_set.sig; 2258 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); 2259 i++, dst++, src++) 2260 err |= __get_user(*dst, src); 2261 if (err) 2262 goto do_sigsegv; 2263 } 2264 target_to_host_sigset_internal(&set, &target_set); 2265 sigprocmask(SIG_SETMASK, &set, NULL); 2266 } 2267 env->pc = pc; 2268 env->npc = npc; 2269 err |= __get_user(env->y, &((*grp)[MC_Y])); 2270 err |= __get_user(tstate, &((*grp)[MC_TSTATE])); 2271 env->asi = (tstate >> 24) & 0xff; 2272 cpu_put_ccr(env, tstate >> 32); 2273 cpu_put_cwp64(env, tstate & 0x1f); 2274 err |= __get_user(env->gregs[1], (&(*grp)[MC_G1])); 2275 err |= __get_user(env->gregs[2], (&(*grp)[MC_G2])); 2276 err |= __get_user(env->gregs[3], (&(*grp)[MC_G3])); 2277 err |= __get_user(env->gregs[4], (&(*grp)[MC_G4])); 2278 err |= __get_user(env->gregs[5], (&(*grp)[MC_G5])); 2279 err |= __get_user(env->gregs[6], (&(*grp)[MC_G6])); 2280 err |= __get_user(env->gregs[7], (&(*grp)[MC_G7])); 2281 err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0])); 2282 err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1])); 2283 err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2])); 2284 err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3])); 2285 err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4])); 2286 err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5])); 2287 err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6])); 2288 err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7])); 2289 2290 err |= __get_user(fp, &(ucp->tuc_mcontext.mc_fp)); 2291 err |= __get_user(i7, &(ucp->tuc_mcontext.mc_i7)); 2292 2293 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; 2294 if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), 2295 abi_ulong) != 0) 2296 goto do_sigsegv; 2297 if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), 2298 abi_ulong) != 0) 2299 goto do_sigsegv; 2300 /* FIXME this does not match how the kernel handles the FPU in 2301 * its sparc64_set_context implementation. In particular the FPU 2302 * is only restored if fenab is non-zero in: 2303 * __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab)); 2304 */ 2305 err |= __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs)); 2306 { 2307 uint32_t *src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs; 2308 for (i = 0; i < 64; i++, src++) { 2309 if (i & 1) { 2310 err |= __get_user(env->fpr[i/2].l.lower, src); 2311 } else { 2312 err |= __get_user(env->fpr[i/2].l.upper, src); 2313 } 2314 } 2315 } 2316 err |= __get_user(env->fsr, 2317 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr)); 2318 err |= __get_user(env->gsr, 2319 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr)); 2320 if (err) 2321 goto do_sigsegv; 2322 unlock_user_struct(ucp, ucp_addr, 0); 2323 return; 2324 do_sigsegv: 2325 unlock_user_struct(ucp, ucp_addr, 0); 2326 force_sig(TARGET_SIGSEGV); 2327 } 2328 2329 void sparc64_get_context(CPUSPARCState *env) 2330 { 2331 abi_ulong ucp_addr; 2332 struct target_ucontext *ucp; 2333 target_mc_gregset_t *grp; 2334 target_mcontext_t *mcp; 2335 abi_ulong fp, i7, w_addr; 2336 int err; 2337 unsigned int i; 2338 target_sigset_t target_set; 2339 sigset_t set; 2340 2341 ucp_addr = env->regwptr[UREG_I0]; 2342 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) 2343 goto do_sigsegv; 2344 2345 mcp = &ucp->tuc_mcontext; 2346 grp = &mcp->mc_gregs; 2347 2348 /* Skip over the trap instruction, first. */ 2349 env->pc = env->npc; 2350 env->npc += 4; 2351 2352 err = 0; 2353 2354 sigprocmask(0, NULL, &set); 2355 host_to_target_sigset_internal(&target_set, &set); 2356 if (TARGET_NSIG_WORDS == 1) { 2357 err |= __put_user(target_set.sig[0], 2358 (abi_ulong *)&ucp->tuc_sigmask); 2359 } else { 2360 abi_ulong *src, *dst; 2361 src = target_set.sig; 2362 dst = ucp->tuc_sigmask.sig; 2363 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); 2364 i++, dst++, src++) 2365 err |= __put_user(*src, dst); 2366 if (err) 2367 goto do_sigsegv; 2368 } 2369 2370 /* XXX: tstate must be saved properly */ 2371 // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE])); 2372 err |= __put_user(env->pc, &((*grp)[MC_PC])); 2373 err |= __put_user(env->npc, &((*grp)[MC_NPC])); 2374 err |= __put_user(env->y, &((*grp)[MC_Y])); 2375 err |= __put_user(env->gregs[1], &((*grp)[MC_G1])); 2376 err |= __put_user(env->gregs[2], &((*grp)[MC_G2])); 2377 err |= __put_user(env->gregs[3], &((*grp)[MC_G3])); 2378 err |= __put_user(env->gregs[4], &((*grp)[MC_G4])); 2379 err |= __put_user(env->gregs[5], &((*grp)[MC_G5])); 2380 err |= __put_user(env->gregs[6], &((*grp)[MC_G6])); 2381 err |= __put_user(env->gregs[7], &((*grp)[MC_G7])); 2382 err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0])); 2383 err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1])); 2384 err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2])); 2385 err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3])); 2386 err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4])); 2387 err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5])); 2388 err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6])); 2389 err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7])); 2390 2391 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; 2392 fp = i7 = 0; 2393 if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), 2394 abi_ulong) != 0) 2395 goto do_sigsegv; 2396 if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), 2397 abi_ulong) != 0) 2398 goto do_sigsegv; 2399 err |= __put_user(fp, &(mcp->mc_fp)); 2400 err |= __put_user(i7, &(mcp->mc_i7)); 2401 2402 { 2403 uint32_t *dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs; 2404 for (i = 0; i < 64; i++, dst++) { 2405 if (i & 1) { 2406 err |= __put_user(env->fpr[i/2].l.lower, dst); 2407 } else { 2408 err |= __put_user(env->fpr[i/2].l.upper, dst); 2409 } 2410 } 2411 } 2412 err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr)); 2413 err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr)); 2414 err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs)); 2415 2416 if (err) 2417 goto do_sigsegv; 2418 unlock_user_struct(ucp, ucp_addr, 1); 2419 return; 2420 do_sigsegv: 2421 unlock_user_struct(ucp, ucp_addr, 1); 2422 force_sig(TARGET_SIGSEGV); 2423 } 2424 #endif 2425 #elif defined(TARGET_ABI_MIPSN64) 2426 2427 # warning signal handling not implemented 2428 2429 static void setup_frame(int sig, struct target_sigaction *ka, 2430 target_sigset_t *set, CPUState *env) 2431 { 2432 fprintf(stderr, "setup_frame: not implemented\n"); 2433 } 2434 2435 static void setup_rt_frame(int sig, struct target_sigaction *ka, 2436 target_siginfo_t *info, 2437 target_sigset_t *set, CPUState *env) 2438 { 2439 fprintf(stderr, "setup_rt_frame: not implemented\n"); 2440 } 2441 2442 long do_sigreturn(CPUState *env) 2443 { 2444 fprintf(stderr, "do_sigreturn: not implemented\n"); 2445 return -TARGET_ENOSYS; 2446 } 2447 2448 long do_rt_sigreturn(CPUState *env) 2449 { 2450 fprintf(stderr, "do_rt_sigreturn: not implemented\n"); 2451 return -TARGET_ENOSYS; 2452 } 2453 2454 #elif defined(TARGET_ABI_MIPSN32) 2455 2456 # warning signal handling not implemented 2457 2458 static void setup_frame(int sig, struct target_sigaction *ka, 2459 target_sigset_t *set, CPUState *env) 2460 { 2461 fprintf(stderr, "setup_frame: not implemented\n"); 2462 } 2463 2464 static void setup_rt_frame(int sig, struct target_sigaction *ka, 2465 target_siginfo_t *info, 2466 target_sigset_t *set, CPUState *env) 2467 { 2468 fprintf(stderr, "setup_rt_frame: not implemented\n"); 2469 } 2470 2471 long do_sigreturn(CPUState *env) 2472 { 2473 fprintf(stderr, "do_sigreturn: not implemented\n"); 2474 return -TARGET_ENOSYS; 2475 } 2476 2477 long do_rt_sigreturn(CPUState *env) 2478 { 2479 fprintf(stderr, "do_rt_sigreturn: not implemented\n"); 2480 return -TARGET_ENOSYS; 2481 } 2482 2483 #elif defined(TARGET_ABI_MIPSO32) 2484 2485 struct target_sigcontext { 2486 uint32_t sc_regmask; /* Unused */ 2487 uint32_t sc_status; 2488 uint64_t sc_pc; 2489 uint64_t sc_regs[32]; 2490 uint64_t sc_fpregs[32]; 2491 uint32_t sc_ownedfp; /* Unused */ 2492 uint32_t sc_fpc_csr; 2493 uint32_t sc_fpc_eir; /* Unused */ 2494 uint32_t sc_used_math; 2495 uint32_t sc_dsp; /* dsp status, was sc_ssflags */ 2496 uint32_t pad0; 2497 uint64_t sc_mdhi; 2498 uint64_t sc_mdlo; 2499 target_ulong sc_hi1; /* Was sc_cause */ 2500 target_ulong sc_lo1; /* Was sc_badvaddr */ 2501 target_ulong sc_hi2; /* Was sc_sigset[4] */ 2502 target_ulong sc_lo2; 2503 target_ulong sc_hi3; 2504 target_ulong sc_lo3; 2505 }; 2506 2507 struct sigframe { 2508 uint32_t sf_ass[4]; /* argument save space for o32 */ 2509 uint32_t sf_code[2]; /* signal trampoline */ 2510 struct target_sigcontext sf_sc; 2511 target_sigset_t sf_mask; 2512 }; 2513 2514 struct target_ucontext { 2515 target_ulong tuc_flags; 2516 target_ulong tuc_link; 2517 target_stack_t tuc_stack; 2518 target_ulong pad0; 2519 struct target_sigcontext tuc_mcontext; 2520 target_sigset_t tuc_sigmask; 2521 }; 2522 2523 struct target_rt_sigframe { 2524 uint32_t rs_ass[4]; /* argument save space for o32 */ 2525 uint32_t rs_code[2]; /* signal trampoline */ 2526 struct target_siginfo rs_info; 2527 struct target_ucontext rs_uc; 2528 }; 2529 2530 /* Install trampoline to jump back from signal handler */ 2531 static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall) 2532 { 2533 int err; 2534 2535 /* 2536 * Set up the return code ... 2537 * 2538 * li v0, __NR__foo_sigreturn 2539 * syscall 2540 */ 2541 2542 err = __put_user(0x24020000 + syscall, tramp + 0); 2543 err |= __put_user(0x0000000c , tramp + 1); 2544 /* flush_cache_sigtramp((unsigned long) tramp); */ 2545 return err; 2546 } 2547 2548 static inline int 2549 setup_sigcontext(CPUState *regs, struct target_sigcontext *sc) 2550 { 2551 int err = 0; 2552 2553 err |= __put_user(regs->active_tc.PC, &sc->sc_pc); 2554 2555 #define save_gp_reg(i) do { \ 2556 err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ 2557 } while(0) 2558 __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2); 2559 save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6); 2560 save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10); 2561 save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14); 2562 save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18); 2563 save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22); 2564 save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26); 2565 save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30); 2566 save_gp_reg(31); 2567 #undef save_gp_reg 2568 2569 err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi); 2570 err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo); 2571 2572 /* Not used yet, but might be useful if we ever have DSP suppport */ 2573 #if 0 2574 if (cpu_has_dsp) { 2575 err |= __put_user(mfhi1(), &sc->sc_hi1); 2576 err |= __put_user(mflo1(), &sc->sc_lo1); 2577 err |= __put_user(mfhi2(), &sc->sc_hi2); 2578 err |= __put_user(mflo2(), &sc->sc_lo2); 2579 err |= __put_user(mfhi3(), &sc->sc_hi3); 2580 err |= __put_user(mflo3(), &sc->sc_lo3); 2581 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); 2582 } 2583 /* same with 64 bit */ 2584 #ifdef CONFIG_64BIT 2585 err |= __put_user(regs->hi, &sc->sc_hi[0]); 2586 err |= __put_user(regs->lo, &sc->sc_lo[0]); 2587 if (cpu_has_dsp) { 2588 err |= __put_user(mfhi1(), &sc->sc_hi[1]); 2589 err |= __put_user(mflo1(), &sc->sc_lo[1]); 2590 err |= __put_user(mfhi2(), &sc->sc_hi[2]); 2591 err |= __put_user(mflo2(), &sc->sc_lo[2]); 2592 err |= __put_user(mfhi3(), &sc->sc_hi[3]); 2593 err |= __put_user(mflo3(), &sc->sc_lo[3]); 2594 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); 2595 } 2596 #endif 2597 #endif 2598 2599 #if 0 2600 err |= __put_user(!!used_math(), &sc->sc_used_math); 2601 2602 if (!used_math()) 2603 goto out; 2604 2605 /* 2606 * Save FPU state to signal context. Signal handler will "inherit" 2607 * current FPU state. 2608 */ 2609 preempt_disable(); 2610 2611 if (!is_fpu_owner()) { 2612 own_fpu(); 2613 restore_fp(current); 2614 } 2615 err |= save_fp_context(sc); 2616 2617 preempt_enable(); 2618 out: 2619 #endif 2620 return err; 2621 } 2622 2623 static inline int 2624 restore_sigcontext(CPUState *regs, struct target_sigcontext *sc) 2625 { 2626 int err = 0; 2627 2628 err |= __get_user(regs->CP0_EPC, &sc->sc_pc); 2629 2630 err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi); 2631 err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo); 2632 2633 #define restore_gp_reg(i) do { \ 2634 err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ 2635 } while(0) 2636 restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3); 2637 restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6); 2638 restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9); 2639 restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12); 2640 restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15); 2641 restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18); 2642 restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21); 2643 restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24); 2644 restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27); 2645 restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30); 2646 restore_gp_reg(31); 2647 #undef restore_gp_reg 2648 2649 #if 0 2650 if (cpu_has_dsp) { 2651 err |= __get_user(treg, &sc->sc_hi1); mthi1(treg); 2652 err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg); 2653 err |= __get_user(treg, &sc->sc_hi2); mthi2(treg); 2654 err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg); 2655 err |= __get_user(treg, &sc->sc_hi3); mthi3(treg); 2656 err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg); 2657 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); 2658 } 2659 #ifdef CONFIG_64BIT 2660 err |= __get_user(regs->hi, &sc->sc_hi[0]); 2661 err |= __get_user(regs->lo, &sc->sc_lo[0]); 2662 if (cpu_has_dsp) { 2663 err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg); 2664 err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg); 2665 err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg); 2666 err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg); 2667 err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg); 2668 err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg); 2669 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); 2670 } 2671 #endif 2672 2673 err |= __get_user(used_math, &sc->sc_used_math); 2674 conditional_used_math(used_math); 2675 2676 preempt_disable(); 2677 2678 if (used_math()) { 2679 /* restore fpu context if we have used it before */ 2680 own_fpu(); 2681 err |= restore_fp_context(sc); 2682 } else { 2683 /* signal handler may have used FPU. Give it up. */ 2684 lose_fpu(); 2685 } 2686 2687 preempt_enable(); 2688 #endif 2689 return err; 2690 } 2691 /* 2692 * Determine which stack to use.. 2693 */ 2694 static inline abi_ulong 2695 get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size) 2696 { 2697 unsigned long sp; 2698 2699 /* Default to using normal stack */ 2700 sp = regs->active_tc.gpr[29]; 2701 2702 /* 2703 * FPU emulator may have it's own trampoline active just 2704 * above the user stack, 16-bytes before the next lowest 2705 * 16 byte boundary. Try to avoid trashing it. 2706 */ 2707 sp -= 32; 2708 2709 /* This is the X/Open sanctioned signal stack switching. */ 2710 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { 2711 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 2712 } 2713 2714 return (sp - frame_size) & ~7; 2715 } 2716 2717 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */ 2718 static void setup_frame(int sig, struct target_sigaction * ka, 2719 target_sigset_t *set, CPUState *regs) 2720 { 2721 struct sigframe *frame; 2722 abi_ulong frame_addr; 2723 int i; 2724 2725 frame_addr = get_sigframe(ka, regs, sizeof(*frame)); 2726 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 2727 goto give_sigsegv; 2728 2729 install_sigtramp(frame->sf_code, TARGET_NR_sigreturn); 2730 2731 if(setup_sigcontext(regs, &frame->sf_sc)) 2732 goto give_sigsegv; 2733 2734 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 2735 if(__put_user(set->sig[i], &frame->sf_mask.sig[i])) 2736 goto give_sigsegv; 2737 } 2738 2739 /* 2740 * Arguments to signal handler: 2741 * 2742 * a0 = signal number 2743 * a1 = 0 (should be cause) 2744 * a2 = pointer to struct sigcontext 2745 * 2746 * $25 and PC point to the signal handler, $29 points to the 2747 * struct sigframe. 2748 */ 2749 regs->active_tc.gpr[ 4] = sig; 2750 regs->active_tc.gpr[ 5] = 0; 2751 regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc); 2752 regs->active_tc.gpr[29] = frame_addr; 2753 regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code); 2754 /* The original kernel code sets CP0_EPC to the handler 2755 * since it returns to userland using eret 2756 * we cannot do this here, and we must set PC directly */ 2757 regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler; 2758 unlock_user_struct(frame, frame_addr, 1); 2759 return; 2760 2761 give_sigsegv: 2762 unlock_user_struct(frame, frame_addr, 1); 2763 force_sig(TARGET_SIGSEGV/*, current*/); 2764 return; 2765 } 2766 2767 long do_sigreturn(CPUState *regs) 2768 { 2769 struct sigframe *frame; 2770 abi_ulong frame_addr; 2771 sigset_t blocked; 2772 target_sigset_t target_set; 2773 int i; 2774 2775 #if defined(DEBUG_SIGNAL) 2776 fprintf(stderr, "do_sigreturn\n"); 2777 #endif 2778 frame_addr = regs->active_tc.gpr[29]; 2779 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 2780 goto badframe; 2781 2782 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 2783 if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i])) 2784 goto badframe; 2785 } 2786 2787 target_to_host_sigset_internal(&blocked, &target_set); 2788 sigprocmask(SIG_SETMASK, &blocked, NULL); 2789 2790 if (restore_sigcontext(regs, &frame->sf_sc)) 2791 goto badframe; 2792 2793 #if 0 2794 /* 2795 * Don't let your children do this ... 2796 */ 2797 __asm__ __volatile__( 2798 "move\t$29, %0\n\t" 2799 "j\tsyscall_exit" 2800 :/* no outputs */ 2801 :"r" (®s)); 2802 /* Unreached */ 2803 #endif 2804 2805 regs->active_tc.PC = regs->CP0_EPC; 2806 /* I am not sure this is right, but it seems to work 2807 * maybe a problem with nested signals ? */ 2808 regs->CP0_EPC = 0; 2809 return -TARGET_QEMU_ESIGRETURN; 2810 2811 badframe: 2812 force_sig(TARGET_SIGSEGV/*, current*/); 2813 return 0; 2814 } 2815 2816 static void setup_rt_frame(int sig, struct target_sigaction *ka, 2817 target_siginfo_t *info, 2818 target_sigset_t *set, CPUState *env) 2819 { 2820 struct target_rt_sigframe *frame; 2821 abi_ulong frame_addr; 2822 int i; 2823 2824 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 2825 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 2826 goto give_sigsegv; 2827 2828 install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn); 2829 2830 copy_siginfo_to_user(&frame->rs_info, info); 2831 2832 __put_user(0, &frame->rs_uc.tuc_flags); 2833 __put_user(0, &frame->rs_uc.tuc_link); 2834 __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp); 2835 __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size); 2836 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), 2837 &frame->rs_uc.tuc_stack.ss_flags); 2838 2839 setup_sigcontext(env, &frame->rs_uc.tuc_mcontext); 2840 2841 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 2842 __put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]); 2843 } 2844 2845 /* 2846 * Arguments to signal handler: 2847 * 2848 * a0 = signal number 2849 * a1 = pointer to struct siginfo 2850 * a2 = pointer to struct ucontext 2851 * 2852 * $25 and PC point to the signal handler, $29 points to the 2853 * struct sigframe. 2854 */ 2855 env->active_tc.gpr[ 4] = sig; 2856 env->active_tc.gpr[ 5] = frame_addr 2857 + offsetof(struct target_rt_sigframe, rs_info); 2858 env->active_tc.gpr[ 6] = frame_addr 2859 + offsetof(struct target_rt_sigframe, rs_uc); 2860 env->active_tc.gpr[29] = frame_addr; 2861 env->active_tc.gpr[31] = frame_addr 2862 + offsetof(struct target_rt_sigframe, rs_code); 2863 /* The original kernel code sets CP0_EPC to the handler 2864 * since it returns to userland using eret 2865 * we cannot do this here, and we must set PC directly */ 2866 env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler; 2867 unlock_user_struct(frame, frame_addr, 1); 2868 return; 2869 2870 give_sigsegv: 2871 unlock_user_struct(frame, frame_addr, 1); 2872 force_sig(TARGET_SIGSEGV/*, current*/); 2873 return; 2874 } 2875 2876 long do_rt_sigreturn(CPUState *env) 2877 { 2878 struct target_rt_sigframe *frame; 2879 abi_ulong frame_addr; 2880 sigset_t blocked; 2881 2882 #if defined(DEBUG_SIGNAL) 2883 fprintf(stderr, "do_rt_sigreturn\n"); 2884 #endif 2885 frame_addr = env->active_tc.gpr[29]; 2886 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 2887 goto badframe; 2888 2889 target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask); 2890 sigprocmask(SIG_SETMASK, &blocked, NULL); 2891 2892 if (restore_sigcontext(env, &frame->rs_uc.tuc_mcontext)) 2893 goto badframe; 2894 2895 if (do_sigaltstack(frame_addr + 2896 offsetof(struct target_rt_sigframe, rs_uc.tuc_stack), 2897 0, get_sp_from_cpustate(env)) == -EFAULT) 2898 goto badframe; 2899 2900 env->active_tc.PC = env->CP0_EPC; 2901 /* I am not sure this is right, but it seems to work 2902 * maybe a problem with nested signals ? */ 2903 env->CP0_EPC = 0; 2904 return -TARGET_QEMU_ESIGRETURN; 2905 2906 badframe: 2907 force_sig(TARGET_SIGSEGV/*, current*/); 2908 return 0; 2909 } 2910 2911 #elif defined(TARGET_SH4) 2912 2913 /* 2914 * code and data structures from linux kernel: 2915 * include/asm-sh/sigcontext.h 2916 * arch/sh/kernel/signal.c 2917 */ 2918 2919 struct target_sigcontext { 2920 target_ulong oldmask; 2921 2922 /* CPU registers */ 2923 target_ulong sc_gregs[16]; 2924 target_ulong sc_pc; 2925 target_ulong sc_pr; 2926 target_ulong sc_sr; 2927 target_ulong sc_gbr; 2928 target_ulong sc_mach; 2929 target_ulong sc_macl; 2930 2931 /* FPU registers */ 2932 target_ulong sc_fpregs[16]; 2933 target_ulong sc_xfpregs[16]; 2934 unsigned int sc_fpscr; 2935 unsigned int sc_fpul; 2936 unsigned int sc_ownedfp; 2937 }; 2938 2939 struct target_sigframe 2940 { 2941 struct target_sigcontext sc; 2942 target_ulong extramask[TARGET_NSIG_WORDS-1]; 2943 uint16_t retcode[3]; 2944 }; 2945 2946 2947 struct target_ucontext { 2948 target_ulong tuc_flags; 2949 struct target_ucontext *tuc_link; 2950 target_stack_t tuc_stack; 2951 struct target_sigcontext tuc_mcontext; 2952 target_sigset_t tuc_sigmask; /* mask last for extensibility */ 2953 }; 2954 2955 struct target_rt_sigframe 2956 { 2957 struct target_siginfo info; 2958 struct target_ucontext uc; 2959 uint16_t retcode[3]; 2960 }; 2961 2962 2963 #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */ 2964 #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */ 2965 2966 static abi_ulong get_sigframe(struct target_sigaction *ka, 2967 unsigned long sp, size_t frame_size) 2968 { 2969 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) { 2970 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 2971 } 2972 2973 return (sp - frame_size) & -8ul; 2974 } 2975 2976 static int setup_sigcontext(struct target_sigcontext *sc, 2977 CPUState *regs, unsigned long mask) 2978 { 2979 int err = 0; 2980 int i; 2981 2982 #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) 2983 COPY(gregs[0]); COPY(gregs[1]); 2984 COPY(gregs[2]); COPY(gregs[3]); 2985 COPY(gregs[4]); COPY(gregs[5]); 2986 COPY(gregs[6]); COPY(gregs[7]); 2987 COPY(gregs[8]); COPY(gregs[9]); 2988 COPY(gregs[10]); COPY(gregs[11]); 2989 COPY(gregs[12]); COPY(gregs[13]); 2990 COPY(gregs[14]); COPY(gregs[15]); 2991 COPY(gbr); COPY(mach); 2992 COPY(macl); COPY(pr); 2993 COPY(sr); COPY(pc); 2994 #undef COPY 2995 2996 for (i=0; i<16; i++) { 2997 err |= __put_user(regs->fregs[i], &sc->sc_fpregs[i]); 2998 } 2999 err |= __put_user(regs->fpscr, &sc->sc_fpscr); 3000 err |= __put_user(regs->fpul, &sc->sc_fpul); 3001 3002 /* non-iBCS2 extensions.. */ 3003 err |= __put_user(mask, &sc->oldmask); 3004 3005 return err; 3006 } 3007 3008 static int restore_sigcontext(CPUState *regs, struct target_sigcontext *sc, 3009 target_ulong *r0_p) 3010 { 3011 unsigned int err = 0; 3012 int i; 3013 3014 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) 3015 COPY(gregs[1]); 3016 COPY(gregs[2]); COPY(gregs[3]); 3017 COPY(gregs[4]); COPY(gregs[5]); 3018 COPY(gregs[6]); COPY(gregs[7]); 3019 COPY(gregs[8]); COPY(gregs[9]); 3020 COPY(gregs[10]); COPY(gregs[11]); 3021 COPY(gregs[12]); COPY(gregs[13]); 3022 COPY(gregs[14]); COPY(gregs[15]); 3023 COPY(gbr); COPY(mach); 3024 COPY(macl); COPY(pr); 3025 COPY(sr); COPY(pc); 3026 #undef COPY 3027 3028 for (i=0; i<16; i++) { 3029 err |= __get_user(regs->fregs[i], &sc->sc_fpregs[i]); 3030 } 3031 err |= __get_user(regs->fpscr, &sc->sc_fpscr); 3032 err |= __get_user(regs->fpul, &sc->sc_fpul); 3033 3034 regs->tra = -1; /* disable syscall checks */ 3035 err |= __get_user(*r0_p, &sc->sc_gregs[0]); 3036 return err; 3037 } 3038 3039 static void setup_frame(int sig, struct target_sigaction *ka, 3040 target_sigset_t *set, CPUState *regs) 3041 { 3042 struct target_sigframe *frame; 3043 abi_ulong frame_addr; 3044 int i; 3045 int err = 0; 3046 int signal; 3047 3048 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); 3049 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 3050 goto give_sigsegv; 3051 3052 signal = current_exec_domain_sig(sig); 3053 3054 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]); 3055 3056 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { 3057 err |= __put_user(set->sig[i + 1], &frame->extramask[i]); 3058 } 3059 3060 /* Set up to return from userspace. If provided, use a stub 3061 already in userspace. */ 3062 if (ka->sa_flags & TARGET_SA_RESTORER) { 3063 regs->pr = (unsigned long) ka->sa_restorer; 3064 } else { 3065 /* Generate return code (system call to sigreturn) */ 3066 err |= __put_user(MOVW(2), &frame->retcode[0]); 3067 err |= __put_user(TRAP_NOARG, &frame->retcode[1]); 3068 err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]); 3069 regs->pr = (unsigned long) frame->retcode; 3070 } 3071 3072 if (err) 3073 goto give_sigsegv; 3074 3075 /* Set up registers for signal handler */ 3076 regs->gregs[15] = frame_addr; 3077 regs->gregs[4] = signal; /* Arg for signal handler */ 3078 regs->gregs[5] = 0; 3079 regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc); 3080 regs->pc = (unsigned long) ka->_sa_handler; 3081 3082 unlock_user_struct(frame, frame_addr, 1); 3083 return; 3084 3085 give_sigsegv: 3086 unlock_user_struct(frame, frame_addr, 1); 3087 force_sig(TARGET_SIGSEGV); 3088 } 3089 3090 static void setup_rt_frame(int sig, struct target_sigaction *ka, 3091 target_siginfo_t *info, 3092 target_sigset_t *set, CPUState *regs) 3093 { 3094 struct target_rt_sigframe *frame; 3095 abi_ulong frame_addr; 3096 int i; 3097 int err = 0; 3098 int signal; 3099 3100 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); 3101 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 3102 goto give_sigsegv; 3103 3104 signal = current_exec_domain_sig(sig); 3105 3106 err |= copy_siginfo_to_user(&frame->info, info); 3107 3108 /* Create the ucontext. */ 3109 err |= __put_user(0, &frame->uc.tuc_flags); 3110 err |= __put_user(0, (unsigned long *)&frame->uc.tuc_link); 3111 err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp, 3112 &frame->uc.tuc_stack.ss_sp); 3113 err |= __put_user(sas_ss_flags(regs->gregs[15]), 3114 &frame->uc.tuc_stack.ss_flags); 3115 err |= __put_user(target_sigaltstack_used.ss_size, 3116 &frame->uc.tuc_stack.ss_size); 3117 err |= setup_sigcontext(&frame->uc.tuc_mcontext, 3118 regs, set->sig[0]); 3119 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 3120 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); 3121 } 3122 3123 /* Set up to return from userspace. If provided, use a stub 3124 already in userspace. */ 3125 if (ka->sa_flags & TARGET_SA_RESTORER) { 3126 regs->pr = (unsigned long) ka->sa_restorer; 3127 } else { 3128 /* Generate return code (system call to sigreturn) */ 3129 err |= __put_user(MOVW(2), &frame->retcode[0]); 3130 err |= __put_user(TRAP_NOARG, &frame->retcode[1]); 3131 err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]); 3132 regs->pr = (unsigned long) frame->retcode; 3133 } 3134 3135 if (err) 3136 goto give_sigsegv; 3137 3138 /* Set up registers for signal handler */ 3139 regs->gregs[15] = frame_addr; 3140 regs->gregs[4] = signal; /* Arg for signal handler */ 3141 regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info); 3142 regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc); 3143 regs->pc = (unsigned long) ka->_sa_handler; 3144 3145 unlock_user_struct(frame, frame_addr, 1); 3146 return; 3147 3148 give_sigsegv: 3149 unlock_user_struct(frame, frame_addr, 1); 3150 force_sig(TARGET_SIGSEGV); 3151 } 3152 3153 long do_sigreturn(CPUState *regs) 3154 { 3155 struct target_sigframe *frame; 3156 abi_ulong frame_addr; 3157 sigset_t blocked; 3158 target_sigset_t target_set; 3159 target_ulong r0; 3160 int i; 3161 int err = 0; 3162 3163 #if defined(DEBUG_SIGNAL) 3164 fprintf(stderr, "do_sigreturn\n"); 3165 #endif 3166 frame_addr = regs->gregs[15]; 3167 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 3168 goto badframe; 3169 3170 err |= __get_user(target_set.sig[0], &frame->sc.oldmask); 3171 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3172 err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1])); 3173 } 3174 3175 if (err) 3176 goto badframe; 3177 3178 target_to_host_sigset_internal(&blocked, &target_set); 3179 sigprocmask(SIG_SETMASK, &blocked, NULL); 3180 3181 if (restore_sigcontext(regs, &frame->sc, &r0)) 3182 goto badframe; 3183 3184 unlock_user_struct(frame, frame_addr, 0); 3185 return r0; 3186 3187 badframe: 3188 unlock_user_struct(frame, frame_addr, 0); 3189 force_sig(TARGET_SIGSEGV); 3190 return 0; 3191 } 3192 3193 long do_rt_sigreturn(CPUState *regs) 3194 { 3195 struct target_rt_sigframe *frame; 3196 abi_ulong frame_addr; 3197 sigset_t blocked; 3198 target_ulong r0; 3199 3200 #if defined(DEBUG_SIGNAL) 3201 fprintf(stderr, "do_rt_sigreturn\n"); 3202 #endif 3203 frame_addr = regs->gregs[15]; 3204 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 3205 goto badframe; 3206 3207 target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask); 3208 sigprocmask(SIG_SETMASK, &blocked, NULL); 3209 3210 if (restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0)) 3211 goto badframe; 3212 3213 if (do_sigaltstack(frame_addr + 3214 offsetof(struct target_rt_sigframe, uc.tuc_stack), 3215 0, get_sp_from_cpustate(regs)) == -EFAULT) 3216 goto badframe; 3217 3218 unlock_user_struct(frame, frame_addr, 0); 3219 return r0; 3220 3221 badframe: 3222 unlock_user_struct(frame, frame_addr, 0); 3223 force_sig(TARGET_SIGSEGV); 3224 return 0; 3225 } 3226 #elif defined(TARGET_MICROBLAZE) 3227 3228 struct target_sigcontext { 3229 struct target_pt_regs regs; /* needs to be first */ 3230 uint32_t oldmask; 3231 }; 3232 3233 struct target_stack_t { 3234 abi_ulong ss_sp; 3235 int ss_flags; 3236 unsigned int ss_size; 3237 }; 3238 3239 struct target_ucontext { 3240 abi_ulong tuc_flags; 3241 abi_ulong tuc_link; 3242 struct target_stack_t tuc_stack; 3243 struct target_sigcontext tuc_mcontext; 3244 uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1]; 3245 }; 3246 3247 /* Signal frames. */ 3248 struct target_signal_frame { 3249 struct target_ucontext uc; 3250 uint32_t extramask[TARGET_NSIG_WORDS - 1]; 3251 uint32_t tramp[2]; 3252 }; 3253 3254 struct rt_signal_frame { 3255 struct siginfo info; 3256 struct ucontext uc; 3257 uint32_t tramp[2]; 3258 }; 3259 3260 static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) 3261 { 3262 __put_user(env->regs[0], &sc->regs.r0); 3263 __put_user(env->regs[1], &sc->regs.r1); 3264 __put_user(env->regs[2], &sc->regs.r2); 3265 __put_user(env->regs[3], &sc->regs.r3); 3266 __put_user(env->regs[4], &sc->regs.r4); 3267 __put_user(env->regs[5], &sc->regs.r5); 3268 __put_user(env->regs[6], &sc->regs.r6); 3269 __put_user(env->regs[7], &sc->regs.r7); 3270 __put_user(env->regs[8], &sc->regs.r8); 3271 __put_user(env->regs[9], &sc->regs.r9); 3272 __put_user(env->regs[10], &sc->regs.r10); 3273 __put_user(env->regs[11], &sc->regs.r11); 3274 __put_user(env->regs[12], &sc->regs.r12); 3275 __put_user(env->regs[13], &sc->regs.r13); 3276 __put_user(env->regs[14], &sc->regs.r14); 3277 __put_user(env->regs[15], &sc->regs.r15); 3278 __put_user(env->regs[16], &sc->regs.r16); 3279 __put_user(env->regs[17], &sc->regs.r17); 3280 __put_user(env->regs[18], &sc->regs.r18); 3281 __put_user(env->regs[19], &sc->regs.r19); 3282 __put_user(env->regs[20], &sc->regs.r20); 3283 __put_user(env->regs[21], &sc->regs.r21); 3284 __put_user(env->regs[22], &sc->regs.r22); 3285 __put_user(env->regs[23], &sc->regs.r23); 3286 __put_user(env->regs[24], &sc->regs.r24); 3287 __put_user(env->regs[25], &sc->regs.r25); 3288 __put_user(env->regs[26], &sc->regs.r26); 3289 __put_user(env->regs[27], &sc->regs.r27); 3290 __put_user(env->regs[28], &sc->regs.r28); 3291 __put_user(env->regs[29], &sc->regs.r29); 3292 __put_user(env->regs[30], &sc->regs.r30); 3293 __put_user(env->regs[31], &sc->regs.r31); 3294 __put_user(env->sregs[SR_PC], &sc->regs.pc); 3295 } 3296 3297 static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) 3298 { 3299 __get_user(env->regs[0], &sc->regs.r0); 3300 __get_user(env->regs[1], &sc->regs.r1); 3301 __get_user(env->regs[2], &sc->regs.r2); 3302 __get_user(env->regs[3], &sc->regs.r3); 3303 __get_user(env->regs[4], &sc->regs.r4); 3304 __get_user(env->regs[5], &sc->regs.r5); 3305 __get_user(env->regs[6], &sc->regs.r6); 3306 __get_user(env->regs[7], &sc->regs.r7); 3307 __get_user(env->regs[8], &sc->regs.r8); 3308 __get_user(env->regs[9], &sc->regs.r9); 3309 __get_user(env->regs[10], &sc->regs.r10); 3310 __get_user(env->regs[11], &sc->regs.r11); 3311 __get_user(env->regs[12], &sc->regs.r12); 3312 __get_user(env->regs[13], &sc->regs.r13); 3313 __get_user(env->regs[14], &sc->regs.r14); 3314 __get_user(env->regs[15], &sc->regs.r15); 3315 __get_user(env->regs[16], &sc->regs.r16); 3316 __get_user(env->regs[17], &sc->regs.r17); 3317 __get_user(env->regs[18], &sc->regs.r18); 3318 __get_user(env->regs[19], &sc->regs.r19); 3319 __get_user(env->regs[20], &sc->regs.r20); 3320 __get_user(env->regs[21], &sc->regs.r21); 3321 __get_user(env->regs[22], &sc->regs.r22); 3322 __get_user(env->regs[23], &sc->regs.r23); 3323 __get_user(env->regs[24], &sc->regs.r24); 3324 __get_user(env->regs[25], &sc->regs.r25); 3325 __get_user(env->regs[26], &sc->regs.r26); 3326 __get_user(env->regs[27], &sc->regs.r27); 3327 __get_user(env->regs[28], &sc->regs.r28); 3328 __get_user(env->regs[29], &sc->regs.r29); 3329 __get_user(env->regs[30], &sc->regs.r30); 3330 __get_user(env->regs[31], &sc->regs.r31); 3331 __get_user(env->sregs[SR_PC], &sc->regs.pc); 3332 } 3333 3334 static abi_ulong get_sigframe(struct target_sigaction *ka, 3335 CPUState *env, int frame_size) 3336 { 3337 abi_ulong sp = env->regs[1]; 3338 3339 if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp)) 3340 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 3341 3342 return ((sp - frame_size) & -8UL); 3343 } 3344 3345 static void setup_frame(int sig, struct target_sigaction *ka, 3346 target_sigset_t *set, CPUState *env) 3347 { 3348 struct target_signal_frame *frame; 3349 abi_ulong frame_addr; 3350 int err = 0; 3351 int i; 3352 3353 frame_addr = get_sigframe(ka, env, sizeof *frame); 3354 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 3355 goto badframe; 3356 3357 /* Save the mask. */ 3358 err |= __put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask); 3359 if (err) 3360 goto badframe; 3361 3362 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3363 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 3364 goto badframe; 3365 } 3366 3367 setup_sigcontext(&frame->uc.tuc_mcontext, env); 3368 3369 /* Set up to return from userspace. If provided, use a stub 3370 already in userspace. */ 3371 /* minus 8 is offset to cater for "rtsd r15,8" offset */ 3372 if (ka->sa_flags & TARGET_SA_RESTORER) { 3373 env->regs[15] = ((unsigned long)ka->sa_restorer)-8; 3374 } else { 3375 uint32_t t; 3376 /* Note, these encodings are _big endian_! */ 3377 /* addi r12, r0, __NR_sigreturn */ 3378 t = 0x31800000UL | TARGET_NR_sigreturn; 3379 err |= __put_user(t, frame->tramp + 0); 3380 /* brki r14, 0x8 */ 3381 t = 0xb9cc0008UL; 3382 err |= __put_user(t, frame->tramp + 1); 3383 3384 /* Return from sighandler will jump to the tramp. 3385 Negative 8 offset because return is rtsd r15, 8 */ 3386 env->regs[15] = ((unsigned long)frame->tramp) - 8; 3387 } 3388 3389 if (err) 3390 goto badframe; 3391 3392 /* Set up registers for signal handler */ 3393 env->regs[1] = frame_addr; 3394 /* Signal handler args: */ 3395 env->regs[5] = sig; /* Arg 0: signum */ 3396 env->regs[6] = 0; 3397 /* arg 1: sigcontext */ 3398 env->regs[7] = frame_addr += offsetof(typeof(*frame), uc); 3399 3400 /* Offset of 4 to handle microblaze rtid r14, 0 */ 3401 env->sregs[SR_PC] = (unsigned long)ka->_sa_handler; 3402 3403 unlock_user_struct(frame, frame_addr, 1); 3404 return; 3405 badframe: 3406 unlock_user_struct(frame, frame_addr, 1); 3407 force_sig(TARGET_SIGSEGV); 3408 } 3409 3410 static void setup_rt_frame(int sig, struct target_sigaction *ka, 3411 target_siginfo_t *info, 3412 target_sigset_t *set, CPUState *env) 3413 { 3414 fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n"); 3415 } 3416 3417 long do_sigreturn(CPUState *env) 3418 { 3419 struct target_signal_frame *frame; 3420 abi_ulong frame_addr; 3421 target_sigset_t target_set; 3422 sigset_t set; 3423 int i; 3424 3425 frame_addr = env->regs[R_SP]; 3426 /* Make sure the guest isn't playing games. */ 3427 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) 3428 goto badframe; 3429 3430 /* Restore blocked signals */ 3431 if (__get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask)) 3432 goto badframe; 3433 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3434 if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) 3435 goto badframe; 3436 } 3437 target_to_host_sigset_internal(&set, &target_set); 3438 sigprocmask(SIG_SETMASK, &set, NULL); 3439 3440 restore_sigcontext(&frame->uc.tuc_mcontext, env); 3441 /* We got here through a sigreturn syscall, our path back is via an 3442 rtb insn so setup r14 for that. */ 3443 env->regs[14] = env->sregs[SR_PC]; 3444 3445 unlock_user_struct(frame, frame_addr, 0); 3446 return env->regs[10]; 3447 badframe: 3448 unlock_user_struct(frame, frame_addr, 0); 3449 force_sig(TARGET_SIGSEGV); 3450 } 3451 3452 long do_rt_sigreturn(CPUState *env) 3453 { 3454 fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n"); 3455 return -TARGET_ENOSYS; 3456 } 3457 3458 #elif defined(TARGET_CRIS) 3459 3460 struct target_sigcontext { 3461 struct target_pt_regs regs; /* needs to be first */ 3462 uint32_t oldmask; 3463 uint32_t usp; /* usp before stacking this gunk on it */ 3464 }; 3465 3466 /* Signal frames. */ 3467 struct target_signal_frame { 3468 struct target_sigcontext sc; 3469 uint32_t extramask[TARGET_NSIG_WORDS - 1]; 3470 uint8_t retcode[8]; /* Trampoline code. */ 3471 }; 3472 3473 struct rt_signal_frame { 3474 struct siginfo *pinfo; 3475 void *puc; 3476 struct siginfo info; 3477 struct ucontext uc; 3478 uint8_t retcode[8]; /* Trampoline code. */ 3479 }; 3480 3481 static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) 3482 { 3483 __put_user(env->regs[0], &sc->regs.r0); 3484 __put_user(env->regs[1], &sc->regs.r1); 3485 __put_user(env->regs[2], &sc->regs.r2); 3486 __put_user(env->regs[3], &sc->regs.r3); 3487 __put_user(env->regs[4], &sc->regs.r4); 3488 __put_user(env->regs[5], &sc->regs.r5); 3489 __put_user(env->regs[6], &sc->regs.r6); 3490 __put_user(env->regs[7], &sc->regs.r7); 3491 __put_user(env->regs[8], &sc->regs.r8); 3492 __put_user(env->regs[9], &sc->regs.r9); 3493 __put_user(env->regs[10], &sc->regs.r10); 3494 __put_user(env->regs[11], &sc->regs.r11); 3495 __put_user(env->regs[12], &sc->regs.r12); 3496 __put_user(env->regs[13], &sc->regs.r13); 3497 __put_user(env->regs[14], &sc->usp); 3498 __put_user(env->regs[15], &sc->regs.acr); 3499 __put_user(env->pregs[PR_MOF], &sc->regs.mof); 3500 __put_user(env->pregs[PR_SRP], &sc->regs.srp); 3501 __put_user(env->pc, &sc->regs.erp); 3502 } 3503 3504 static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) 3505 { 3506 __get_user(env->regs[0], &sc->regs.r0); 3507 __get_user(env->regs[1], &sc->regs.r1); 3508 __get_user(env->regs[2], &sc->regs.r2); 3509 __get_user(env->regs[3], &sc->regs.r3); 3510 __get_user(env->regs[4], &sc->regs.r4); 3511 __get_user(env->regs[5], &sc->regs.r5); 3512 __get_user(env->regs[6], &sc->regs.r6); 3513 __get_user(env->regs[7], &sc->regs.r7); 3514 __get_user(env->regs[8], &sc->regs.r8); 3515 __get_user(env->regs[9], &sc->regs.r9); 3516 __get_user(env->regs[10], &sc->regs.r10); 3517 __get_user(env->regs[11], &sc->regs.r11); 3518 __get_user(env->regs[12], &sc->regs.r12); 3519 __get_user(env->regs[13], &sc->regs.r13); 3520 __get_user(env->regs[14], &sc->usp); 3521 __get_user(env->regs[15], &sc->regs.acr); 3522 __get_user(env->pregs[PR_MOF], &sc->regs.mof); 3523 __get_user(env->pregs[PR_SRP], &sc->regs.srp); 3524 __get_user(env->pc, &sc->regs.erp); 3525 } 3526 3527 static abi_ulong get_sigframe(CPUState *env, int framesize) 3528 { 3529 abi_ulong sp; 3530 /* Align the stack downwards to 4. */ 3531 sp = (env->regs[R_SP] & ~3); 3532 return sp - framesize; 3533 } 3534 3535 static void setup_frame(int sig, struct target_sigaction *ka, 3536 target_sigset_t *set, CPUState *env) 3537 { 3538 struct target_signal_frame *frame; 3539 abi_ulong frame_addr; 3540 int err = 0; 3541 int i; 3542 3543 frame_addr = get_sigframe(env, sizeof *frame); 3544 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 3545 goto badframe; 3546 3547 /* 3548 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't 3549 * use this trampoline anymore but it sets it up for GDB. 3550 * In QEMU, using the trampoline simplifies things a bit so we use it. 3551 * 3552 * This is movu.w __NR_sigreturn, r9; break 13; 3553 */ 3554 err |= __put_user(0x9c5f, frame->retcode+0); 3555 err |= __put_user(TARGET_NR_sigreturn, 3556 frame->retcode+2); 3557 err |= __put_user(0xe93d, frame->retcode+4); 3558 3559 /* Save the mask. */ 3560 err |= __put_user(set->sig[0], &frame->sc.oldmask); 3561 if (err) 3562 goto badframe; 3563 3564 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3565 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 3566 goto badframe; 3567 } 3568 3569 setup_sigcontext(&frame->sc, env); 3570 3571 /* Move the stack and setup the arguments for the handler. */ 3572 env->regs[R_SP] = frame_addr; 3573 env->regs[10] = sig; 3574 env->pc = (unsigned long) ka->_sa_handler; 3575 /* Link SRP so the guest returns through the trampoline. */ 3576 env->pregs[PR_SRP] = frame_addr + offsetof(typeof(*frame), retcode); 3577 3578 unlock_user_struct(frame, frame_addr, 1); 3579 return; 3580 badframe: 3581 unlock_user_struct(frame, frame_addr, 1); 3582 force_sig(TARGET_SIGSEGV); 3583 } 3584 3585 static void setup_rt_frame(int sig, struct target_sigaction *ka, 3586 target_siginfo_t *info, 3587 target_sigset_t *set, CPUState *env) 3588 { 3589 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n"); 3590 } 3591 3592 long do_sigreturn(CPUState *env) 3593 { 3594 struct target_signal_frame *frame; 3595 abi_ulong frame_addr; 3596 target_sigset_t target_set; 3597 sigset_t set; 3598 int i; 3599 3600 frame_addr = env->regs[R_SP]; 3601 /* Make sure the guest isn't playing games. */ 3602 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) 3603 goto badframe; 3604 3605 /* Restore blocked signals */ 3606 if (__get_user(target_set.sig[0], &frame->sc.oldmask)) 3607 goto badframe; 3608 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3609 if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) 3610 goto badframe; 3611 } 3612 target_to_host_sigset_internal(&set, &target_set); 3613 sigprocmask(SIG_SETMASK, &set, NULL); 3614 3615 restore_sigcontext(&frame->sc, env); 3616 unlock_user_struct(frame, frame_addr, 0); 3617 return env->regs[10]; 3618 badframe: 3619 unlock_user_struct(frame, frame_addr, 0); 3620 force_sig(TARGET_SIGSEGV); 3621 } 3622 3623 long do_rt_sigreturn(CPUState *env) 3624 { 3625 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n"); 3626 return -TARGET_ENOSYS; 3627 } 3628 3629 #elif defined(TARGET_S390X) 3630 3631 #define __NUM_GPRS 16 3632 #define __NUM_FPRS 16 3633 #define __NUM_ACRS 16 3634 3635 #define S390_SYSCALL_SIZE 2 3636 #define __SIGNAL_FRAMESIZE 160 /* FIXME: 31-bit mode -> 96 */ 3637 3638 #define _SIGCONTEXT_NSIG 64 3639 #define _SIGCONTEXT_NSIG_BPW 64 /* FIXME: 31-bit mode -> 32 */ 3640 #define _SIGCONTEXT_NSIG_WORDS (_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW) 3641 #define _SIGMASK_COPY_SIZE (sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS) 3642 #define PSW_ADDR_AMODE 0x0000000000000000UL /* 0x80000000UL for 31-bit */ 3643 #define S390_SYSCALL_OPCODE ((uint16_t)0x0a00) 3644 3645 typedef struct { 3646 target_psw_t psw; 3647 target_ulong gprs[__NUM_GPRS]; 3648 unsigned int acrs[__NUM_ACRS]; 3649 } target_s390_regs_common; 3650 3651 typedef struct { 3652 unsigned int fpc; 3653 double fprs[__NUM_FPRS]; 3654 } target_s390_fp_regs; 3655 3656 typedef struct { 3657 target_s390_regs_common regs; 3658 target_s390_fp_regs fpregs; 3659 } target_sigregs; 3660 3661 struct target_sigcontext { 3662 target_ulong oldmask[_SIGCONTEXT_NSIG_WORDS]; 3663 target_sigregs *sregs; 3664 }; 3665 3666 typedef struct { 3667 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE]; 3668 struct target_sigcontext sc; 3669 target_sigregs sregs; 3670 int signo; 3671 uint8_t retcode[S390_SYSCALL_SIZE]; 3672 } sigframe; 3673 3674 struct target_ucontext { 3675 target_ulong tuc_flags; 3676 struct target_ucontext *tuc_link; 3677 target_stack_t tuc_stack; 3678 target_sigregs tuc_mcontext; 3679 target_sigset_t tuc_sigmask; /* mask last for extensibility */ 3680 }; 3681 3682 typedef struct { 3683 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE]; 3684 uint8_t retcode[S390_SYSCALL_SIZE]; 3685 struct target_siginfo info; 3686 struct target_ucontext uc; 3687 } rt_sigframe; 3688 3689 static inline abi_ulong 3690 get_sigframe(struct target_sigaction *ka, CPUState *env, size_t frame_size) 3691 { 3692 abi_ulong sp; 3693 3694 /* Default to using normal stack */ 3695 sp = env->regs[15]; 3696 3697 /* This is the X/Open sanctioned signal stack switching. */ 3698 if (ka->sa_flags & TARGET_SA_ONSTACK) { 3699 if (!sas_ss_flags(sp)) { 3700 sp = target_sigaltstack_used.ss_sp + 3701 target_sigaltstack_used.ss_size; 3702 } 3703 } 3704 3705 /* This is the legacy signal stack switching. */ 3706 else if (/* FIXME !user_mode(regs) */ 0 && 3707 !(ka->sa_flags & TARGET_SA_RESTORER) && 3708 ka->sa_restorer) { 3709 sp = (abi_ulong) ka->sa_restorer; 3710 } 3711 3712 return (sp - frame_size) & -8ul; 3713 } 3714 3715 static void save_sigregs(CPUState *env, target_sigregs *sregs) 3716 { 3717 int i; 3718 //save_access_regs(current->thread.acrs); FIXME 3719 3720 /* Copy a 'clean' PSW mask to the user to avoid leaking 3721 information about whether PER is currently on. */ 3722 __put_user(env->psw.mask, &sregs->regs.psw.mask); 3723 __put_user(env->psw.addr, &sregs->regs.psw.addr); 3724 for (i = 0; i < 16; i++) { 3725 __put_user(env->regs[i], &sregs->regs.gprs[i]); 3726 } 3727 for (i = 0; i < 16; i++) { 3728 __put_user(env->aregs[i], &sregs->regs.acrs[i]); 3729 } 3730 /* 3731 * We have to store the fp registers to current->thread.fp_regs 3732 * to merge them with the emulated registers. 3733 */ 3734 //save_fp_regs(¤t->thread.fp_regs); FIXME 3735 for (i = 0; i < 16; i++) { 3736 __put_user(env->fregs[i].ll, &sregs->fpregs.fprs[i]); 3737 } 3738 } 3739 3740 static void setup_frame(int sig, struct target_sigaction *ka, 3741 target_sigset_t *set, CPUState *env) 3742 { 3743 sigframe *frame; 3744 abi_ulong frame_addr; 3745 3746 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 3747 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, 3748 (unsigned long long)frame_addr); 3749 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { 3750 goto give_sigsegv; 3751 } 3752 3753 qemu_log("%s: 1\n", __FUNCTION__); 3754 if (__put_user(set->sig[0], &frame->sc.oldmask[0])) { 3755 goto give_sigsegv; 3756 } 3757 3758 save_sigregs(env, &frame->sregs); 3759 3760 __put_user((abi_ulong)(unsigned long)&frame->sregs, 3761 (abi_ulong *)&frame->sc.sregs); 3762 3763 /* Set up to return from userspace. If provided, use a stub 3764 already in userspace. */ 3765 if (ka->sa_flags & TARGET_SA_RESTORER) { 3766 env->regs[14] = (unsigned long) 3767 ka->sa_restorer | PSW_ADDR_AMODE; 3768 } else { 3769 env->regs[14] = (unsigned long) 3770 frame->retcode | PSW_ADDR_AMODE; 3771 if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn, 3772 (uint16_t *)(frame->retcode))) 3773 goto give_sigsegv; 3774 } 3775 3776 /* Set up backchain. */ 3777 if (__put_user(env->regs[15], (abi_ulong *) frame)) { 3778 goto give_sigsegv; 3779 } 3780 3781 /* Set up registers for signal handler */ 3782 env->regs[15] = frame_addr; 3783 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE; 3784 3785 env->regs[2] = sig; //map_signal(sig); 3786 env->regs[3] = frame_addr += offsetof(typeof(*frame), sc); 3787 3788 /* We forgot to include these in the sigcontext. 3789 To avoid breaking binary compatibility, they are passed as args. */ 3790 env->regs[4] = 0; // FIXME: no clue... current->thread.trap_no; 3791 env->regs[5] = 0; // FIXME: no clue... current->thread.prot_addr; 3792 3793 /* Place signal number on stack to allow backtrace from handler. */ 3794 if (__put_user(env->regs[2], (int *) &frame->signo)) { 3795 goto give_sigsegv; 3796 } 3797 unlock_user_struct(frame, frame_addr, 1); 3798 return; 3799 3800 give_sigsegv: 3801 qemu_log("%s: give_sigsegv\n", __FUNCTION__); 3802 unlock_user_struct(frame, frame_addr, 1); 3803 force_sig(TARGET_SIGSEGV); 3804 } 3805 3806 static void setup_rt_frame(int sig, struct target_sigaction *ka, 3807 target_siginfo_t *info, 3808 target_sigset_t *set, CPUState *env) 3809 { 3810 int i; 3811 rt_sigframe *frame; 3812 abi_ulong frame_addr; 3813 3814 frame_addr = get_sigframe(ka, env, sizeof *frame); 3815 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, 3816 (unsigned long long)frame_addr); 3817 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { 3818 goto give_sigsegv; 3819 } 3820 3821 qemu_log("%s: 1\n", __FUNCTION__); 3822 if (copy_siginfo_to_user(&frame->info, info)) { 3823 goto give_sigsegv; 3824 } 3825 3826 /* Create the ucontext. */ 3827 __put_user(0, &frame->uc.tuc_flags); 3828 __put_user((abi_ulong)0, (abi_ulong *)&frame->uc.tuc_link); 3829 __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp); 3830 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), 3831 &frame->uc.tuc_stack.ss_flags); 3832 __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size); 3833 save_sigregs(env, &frame->uc.tuc_mcontext); 3834 for (i = 0; i < TARGET_NSIG_WORDS; i++) { 3835 __put_user((abi_ulong)set->sig[i], 3836 (abi_ulong *)&frame->uc.tuc_sigmask.sig[i]); 3837 } 3838 3839 /* Set up to return from userspace. If provided, use a stub 3840 already in userspace. */ 3841 if (ka->sa_flags & TARGET_SA_RESTORER) { 3842 env->regs[14] = (unsigned long) ka->sa_restorer | PSW_ADDR_AMODE; 3843 } else { 3844 env->regs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE; 3845 if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn, 3846 (uint16_t *)(frame->retcode))) { 3847 goto give_sigsegv; 3848 } 3849 } 3850 3851 /* Set up backchain. */ 3852 if (__put_user(env->regs[15], (abi_ulong *) frame)) { 3853 goto give_sigsegv; 3854 } 3855 3856 /* Set up registers for signal handler */ 3857 env->regs[15] = frame_addr; 3858 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE; 3859 3860 env->regs[2] = sig; //map_signal(sig); 3861 env->regs[3] = frame_addr + offsetof(typeof(*frame), info); 3862 env->regs[4] = frame_addr + offsetof(typeof(*frame), uc); 3863 return; 3864 3865 give_sigsegv: 3866 qemu_log("%s: give_sigsegv\n", __FUNCTION__); 3867 unlock_user_struct(frame, frame_addr, 1); 3868 force_sig(TARGET_SIGSEGV); 3869 } 3870 3871 static int 3872 restore_sigregs(CPUState *env, target_sigregs *sc) 3873 { 3874 int err = 0; 3875 int i; 3876 3877 for (i = 0; i < 16; i++) { 3878 err |= __get_user(env->regs[i], &sc->regs.gprs[i]); 3879 } 3880 3881 err |= __get_user(env->psw.mask, &sc->regs.psw.mask); 3882 qemu_log("%s: sc->regs.psw.addr 0x%llx env->psw.addr 0x%llx\n", 3883 __FUNCTION__, (unsigned long long)sc->regs.psw.addr, 3884 (unsigned long long)env->psw.addr); 3885 err |= __get_user(env->psw.addr, &sc->regs.psw.addr); 3886 /* FIXME: 31-bit -> | PSW_ADDR_AMODE */ 3887 3888 for (i = 0; i < 16; i++) { 3889 err |= __get_user(env->aregs[i], &sc->regs.acrs[i]); 3890 } 3891 for (i = 0; i < 16; i++) { 3892 err |= __get_user(env->fregs[i].ll, &sc->fpregs.fprs[i]); 3893 } 3894 3895 return err; 3896 } 3897 3898 long do_sigreturn(CPUState *env) 3899 { 3900 sigframe *frame; 3901 abi_ulong frame_addr = env->regs[15]; 3902 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, 3903 (unsigned long long)frame_addr); 3904 target_sigset_t target_set; 3905 sigset_t set; 3906 3907 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { 3908 goto badframe; 3909 } 3910 if (__get_user(target_set.sig[0], &frame->sc.oldmask[0])) { 3911 goto badframe; 3912 } 3913 3914 target_to_host_sigset_internal(&set, &target_set); 3915 sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */ 3916 3917 if (restore_sigregs(env, &frame->sregs)) { 3918 goto badframe; 3919 } 3920 3921 unlock_user_struct(frame, frame_addr, 0); 3922 return env->regs[2]; 3923 3924 badframe: 3925 unlock_user_struct(frame, frame_addr, 0); 3926 force_sig(TARGET_SIGSEGV); 3927 return 0; 3928 } 3929 3930 long do_rt_sigreturn(CPUState *env) 3931 { 3932 rt_sigframe *frame; 3933 abi_ulong frame_addr = env->regs[15]; 3934 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, 3935 (unsigned long long)frame_addr); 3936 sigset_t set; 3937 3938 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { 3939 goto badframe; 3940 } 3941 target_to_host_sigset(&set, &frame->uc.tuc_sigmask); 3942 3943 sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */ 3944 3945 if (restore_sigregs(env, &frame->uc.tuc_mcontext)) { 3946 goto badframe; 3947 } 3948 3949 if (do_sigaltstack(frame_addr + offsetof(rt_sigframe, uc.tuc_stack), 0, 3950 get_sp_from_cpustate(env)) == -EFAULT) { 3951 goto badframe; 3952 } 3953 unlock_user_struct(frame, frame_addr, 0); 3954 return env->regs[2]; 3955 3956 badframe: 3957 unlock_user_struct(frame, frame_addr, 0); 3958 force_sig(TARGET_SIGSEGV); 3959 return 0; 3960 } 3961 3962 #elif defined(TARGET_PPC) && !defined(TARGET_PPC64) 3963 3964 /* FIXME: Many of the structures are defined for both PPC and PPC64, but 3965 the signal handling is different enough that we haven't implemented 3966 support for PPC64 yet. Hence the restriction above. 3967 3968 There are various #if'd blocks for code for TARGET_PPC64. These 3969 blocks should go away so that we can successfully run 32-bit and 3970 64-bit binaries on a QEMU configured for PPC64. */ 3971 3972 /* Size of dummy stack frame allocated when calling signal handler. 3973 See arch/powerpc/include/asm/ptrace.h. */ 3974 #if defined(TARGET_PPC64) 3975 #define SIGNAL_FRAMESIZE 128 3976 #else 3977 #define SIGNAL_FRAMESIZE 64 3978 #endif 3979 3980 /* See arch/powerpc/include/asm/sigcontext.h. */ 3981 struct target_sigcontext { 3982 target_ulong _unused[4]; 3983 int32_t signal; 3984 #if defined(TARGET_PPC64) 3985 int32_t pad0; 3986 #endif 3987 target_ulong handler; 3988 target_ulong oldmask; 3989 target_ulong regs; /* struct pt_regs __user * */ 3990 /* TODO: PPC64 includes extra bits here. */ 3991 }; 3992 3993 /* Indices for target_mcontext.mc_gregs, below. 3994 See arch/powerpc/include/asm/ptrace.h for details. */ 3995 enum { 3996 TARGET_PT_R0 = 0, 3997 TARGET_PT_R1 = 1, 3998 TARGET_PT_R2 = 2, 3999 TARGET_PT_R3 = 3, 4000 TARGET_PT_R4 = 4, 4001 TARGET_PT_R5 = 5, 4002 TARGET_PT_R6 = 6, 4003 TARGET_PT_R7 = 7, 4004 TARGET_PT_R8 = 8, 4005 TARGET_PT_R9 = 9, 4006 TARGET_PT_R10 = 10, 4007 TARGET_PT_R11 = 11, 4008 TARGET_PT_R12 = 12, 4009 TARGET_PT_R13 = 13, 4010 TARGET_PT_R14 = 14, 4011 TARGET_PT_R15 = 15, 4012 TARGET_PT_R16 = 16, 4013 TARGET_PT_R17 = 17, 4014 TARGET_PT_R18 = 18, 4015 TARGET_PT_R19 = 19, 4016 TARGET_PT_R20 = 20, 4017 TARGET_PT_R21 = 21, 4018 TARGET_PT_R22 = 22, 4019 TARGET_PT_R23 = 23, 4020 TARGET_PT_R24 = 24, 4021 TARGET_PT_R25 = 25, 4022 TARGET_PT_R26 = 26, 4023 TARGET_PT_R27 = 27, 4024 TARGET_PT_R28 = 28, 4025 TARGET_PT_R29 = 29, 4026 TARGET_PT_R30 = 30, 4027 TARGET_PT_R31 = 31, 4028 TARGET_PT_NIP = 32, 4029 TARGET_PT_MSR = 33, 4030 TARGET_PT_ORIG_R3 = 34, 4031 TARGET_PT_CTR = 35, 4032 TARGET_PT_LNK = 36, 4033 TARGET_PT_XER = 37, 4034 TARGET_PT_CCR = 38, 4035 /* Yes, there are two registers with #39. One is 64-bit only. */ 4036 TARGET_PT_MQ = 39, 4037 TARGET_PT_SOFTE = 39, 4038 TARGET_PT_TRAP = 40, 4039 TARGET_PT_DAR = 41, 4040 TARGET_PT_DSISR = 42, 4041 TARGET_PT_RESULT = 43, 4042 TARGET_PT_REGS_COUNT = 44 4043 }; 4044 4045 /* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC; 4046 on 64-bit PPC, sigcontext and mcontext are one and the same. */ 4047 struct target_mcontext { 4048 target_ulong mc_gregs[48]; 4049 /* Includes fpscr. */ 4050 uint64_t mc_fregs[33]; 4051 target_ulong mc_pad[2]; 4052 /* We need to handle Altivec and SPE at the same time, which no 4053 kernel needs to do. Fortunately, the kernel defines this bit to 4054 be Altivec-register-large all the time, rather than trying to 4055 twiddle it based on the specific platform. */ 4056 union { 4057 /* SPE vector registers. One extra for SPEFSCR. */ 4058 uint32_t spe[33]; 4059 /* Altivec vector registers. The packing of VSCR and VRSAVE 4060 varies depending on whether we're PPC64 or not: PPC64 splits 4061 them apart; PPC32 stuffs them together. */ 4062 #if defined(TARGET_PPC64) 4063 #define QEMU_NVRREG 34 4064 #else 4065 #define QEMU_NVRREG 33 4066 #endif 4067 ppc_avr_t altivec[QEMU_NVRREG]; 4068 #undef QEMU_NVRREG 4069 } mc_vregs __attribute__((__aligned__(16))); 4070 }; 4071 4072 struct target_ucontext { 4073 target_ulong tuc_flags; 4074 target_ulong tuc_link; /* struct ucontext __user * */ 4075 struct target_sigaltstack tuc_stack; 4076 #if !defined(TARGET_PPC64) 4077 int32_t tuc_pad[7]; 4078 target_ulong tuc_regs; /* struct mcontext __user * 4079 points to uc_mcontext field */ 4080 #endif 4081 target_sigset_t tuc_sigmask; 4082 #if defined(TARGET_PPC64) 4083 target_sigset_t unused[15]; /* Allow for uc_sigmask growth */ 4084 struct target_sigcontext tuc_mcontext; 4085 #else 4086 int32_t tuc_maskext[30]; 4087 int32_t tuc_pad2[3]; 4088 struct target_mcontext tuc_mcontext; 4089 #endif 4090 }; 4091 4092 /* See arch/powerpc/kernel/signal_32.c. */ 4093 struct target_sigframe { 4094 struct target_sigcontext sctx; 4095 struct target_mcontext mctx; 4096 int32_t abigap[56]; 4097 }; 4098 4099 struct target_rt_sigframe { 4100 struct target_siginfo info; 4101 struct target_ucontext uc; 4102 int32_t abigap[56]; 4103 }; 4104 4105 /* We use the mc_pad field for the signal return trampoline. */ 4106 #define tramp mc_pad 4107 4108 /* See arch/powerpc/kernel/signal.c. */ 4109 static target_ulong get_sigframe(struct target_sigaction *ka, 4110 CPUState *env, 4111 int frame_size) 4112 { 4113 target_ulong oldsp, newsp; 4114 4115 oldsp = env->gpr[1]; 4116 4117 if ((ka->sa_flags & TARGET_SA_ONSTACK) && 4118 (sas_ss_flags(oldsp))) { 4119 oldsp = (target_sigaltstack_used.ss_sp 4120 + target_sigaltstack_used.ss_size); 4121 } 4122 4123 newsp = (oldsp - frame_size) & ~0xFUL; 4124 4125 return newsp; 4126 } 4127 4128 static int save_user_regs(CPUState *env, struct target_mcontext *frame, 4129 int sigret) 4130 { 4131 target_ulong msr = env->msr; 4132 int i; 4133 target_ulong ccr = 0; 4134 4135 /* In general, the kernel attempts to be intelligent about what it 4136 needs to save for Altivec/FP/SPE registers. We don't care that 4137 much, so we just go ahead and save everything. */ 4138 4139 /* Save general registers. */ 4140 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { 4141 if (__put_user(env->gpr[i], &frame->mc_gregs[i])) { 4142 return 1; 4143 } 4144 } 4145 if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]) 4146 || __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]) 4147 || __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]) 4148 || __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER])) 4149 return 1; 4150 4151 for (i = 0; i < ARRAY_SIZE(env->crf); i++) { 4152 ccr |= env->crf[i] << (32 - ((i + 1) * 4)); 4153 } 4154 if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR])) 4155 return 1; 4156 4157 /* Save Altivec registers if necessary. */ 4158 if (env->insns_flags & PPC_ALTIVEC) { 4159 for (i = 0; i < ARRAY_SIZE(env->avr); i++) { 4160 ppc_avr_t *avr = &env->avr[i]; 4161 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; 4162 4163 if (__put_user(avr->u64[0], &vreg->u64[0]) || 4164 __put_user(avr->u64[1], &vreg->u64[1])) { 4165 return 1; 4166 } 4167 } 4168 /* Set MSR_VR in the saved MSR value to indicate that 4169 frame->mc_vregs contains valid data. */ 4170 msr |= MSR_VR; 4171 if (__put_user((uint32_t)env->spr[SPR_VRSAVE], 4172 &frame->mc_vregs.altivec[32].u32[3])) 4173 return 1; 4174 } 4175 4176 /* Save floating point registers. */ 4177 if (env->insns_flags & PPC_FLOAT) { 4178 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { 4179 if (__put_user(env->fpr[i], &frame->mc_fregs[i])) { 4180 return 1; 4181 } 4182 } 4183 if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32])) 4184 return 1; 4185 } 4186 4187 /* Save SPE registers. The kernel only saves the high half. */ 4188 if (env->insns_flags & PPC_SPE) { 4189 #if defined(TARGET_PPC64) 4190 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { 4191 if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) { 4192 return 1; 4193 } 4194 } 4195 #else 4196 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { 4197 if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) { 4198 return 1; 4199 } 4200 } 4201 #endif 4202 /* Set MSR_SPE in the saved MSR value to indicate that 4203 frame->mc_vregs contains valid data. */ 4204 msr |= MSR_SPE; 4205 if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32])) 4206 return 1; 4207 } 4208 4209 /* Store MSR. */ 4210 if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR])) 4211 return 1; 4212 4213 /* Set up the sigreturn trampoline: li r0,sigret; sc. */ 4214 if (sigret) { 4215 if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) || 4216 __put_user(0x44000002UL, &frame->tramp[1])) { 4217 return 1; 4218 } 4219 } 4220 4221 return 0; 4222 } 4223 4224 static int restore_user_regs(CPUState *env, 4225 struct target_mcontext *frame, int sig) 4226 { 4227 target_ulong save_r2 = 0; 4228 target_ulong msr; 4229 target_ulong ccr; 4230 4231 int i; 4232 4233 if (!sig) { 4234 save_r2 = env->gpr[2]; 4235 } 4236 4237 /* Restore general registers. */ 4238 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { 4239 if (__get_user(env->gpr[i], &frame->mc_gregs[i])) { 4240 return 1; 4241 } 4242 } 4243 if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]) 4244 || __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]) 4245 || __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]) 4246 || __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER])) 4247 return 1; 4248 if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR])) 4249 return 1; 4250 4251 for (i = 0; i < ARRAY_SIZE(env->crf); i++) { 4252 env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf; 4253 } 4254 4255 if (!sig) { 4256 env->gpr[2] = save_r2; 4257 } 4258 /* Restore MSR. */ 4259 if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR])) 4260 return 1; 4261 4262 /* If doing signal return, restore the previous little-endian mode. */ 4263 if (sig) 4264 env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE); 4265 4266 /* Restore Altivec registers if necessary. */ 4267 if (env->insns_flags & PPC_ALTIVEC) { 4268 for (i = 0; i < ARRAY_SIZE(env->avr); i++) { 4269 ppc_avr_t *avr = &env->avr[i]; 4270 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; 4271 4272 if (__get_user(avr->u64[0], &vreg->u64[0]) || 4273 __get_user(avr->u64[1], &vreg->u64[1])) { 4274 return 1; 4275 } 4276 } 4277 /* Set MSR_VEC in the saved MSR value to indicate that 4278 frame->mc_vregs contains valid data. */ 4279 if (__get_user(env->spr[SPR_VRSAVE], 4280 (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3]))) 4281 return 1; 4282 } 4283 4284 /* Restore floating point registers. */ 4285 if (env->insns_flags & PPC_FLOAT) { 4286 uint64_t fpscr; 4287 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { 4288 if (__get_user(env->fpr[i], &frame->mc_fregs[i])) { 4289 return 1; 4290 } 4291 } 4292 if (__get_user(fpscr, &frame->mc_fregs[32])) 4293 return 1; 4294 env->fpscr = (uint32_t) fpscr; 4295 } 4296 4297 /* Save SPE registers. The kernel only saves the high half. */ 4298 if (env->insns_flags & PPC_SPE) { 4299 #if defined(TARGET_PPC64) 4300 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { 4301 uint32_t hi; 4302 4303 if (__get_user(hi, &frame->mc_vregs.spe[i])) { 4304 return 1; 4305 } 4306 env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]); 4307 } 4308 #else 4309 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { 4310 if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) { 4311 return 1; 4312 } 4313 } 4314 #endif 4315 if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32])) 4316 return 1; 4317 } 4318 4319 return 0; 4320 } 4321 4322 static void setup_frame(int sig, struct target_sigaction *ka, 4323 target_sigset_t *set, CPUState *env) 4324 { 4325 struct target_sigframe *frame; 4326 struct target_sigcontext *sc; 4327 target_ulong frame_addr, newsp; 4328 int err = 0; 4329 int signal; 4330 4331 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 4332 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) 4333 goto sigsegv; 4334 sc = &frame->sctx; 4335 4336 signal = current_exec_domain_sig(sig); 4337 4338 err |= __put_user(h2g(ka->_sa_handler), &sc->handler); 4339 err |= __put_user(set->sig[0], &sc->oldmask); 4340 #if defined(TARGET_PPC64) 4341 err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]); 4342 #else 4343 err |= __put_user(set->sig[1], &sc->_unused[3]); 4344 #endif 4345 err |= __put_user(h2g(&frame->mctx), &sc->regs); 4346 err |= __put_user(sig, &sc->signal); 4347 4348 /* Save user regs. */ 4349 err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn); 4350 4351 /* The kernel checks for the presence of a VDSO here. We don't 4352 emulate a vdso, so use a sigreturn system call. */ 4353 env->lr = (target_ulong) h2g(frame->mctx.tramp); 4354 4355 /* Turn off all fp exceptions. */ 4356 env->fpscr = 0; 4357 4358 /* Create a stack frame for the caller of the handler. */ 4359 newsp = frame_addr - SIGNAL_FRAMESIZE; 4360 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp); 4361 4362 if (err) 4363 goto sigsegv; 4364 4365 /* Set up registers for signal handler. */ 4366 env->gpr[1] = newsp; 4367 env->gpr[3] = signal; 4368 env->gpr[4] = (target_ulong) h2g(sc); 4369 env->nip = (target_ulong) ka->_sa_handler; 4370 /* Signal handlers are entered in big-endian mode. */ 4371 env->msr &= ~MSR_LE; 4372 4373 unlock_user_struct(frame, frame_addr, 1); 4374 return; 4375 4376 sigsegv: 4377 unlock_user_struct(frame, frame_addr, 1); 4378 if (logfile) 4379 fprintf (logfile, "segfaulting from setup_frame\n"); 4380 force_sig(TARGET_SIGSEGV); 4381 } 4382 4383 static void setup_rt_frame(int sig, struct target_sigaction *ka, 4384 target_siginfo_t *info, 4385 target_sigset_t *set, CPUState *env) 4386 { 4387 struct target_rt_sigframe *rt_sf; 4388 struct target_mcontext *frame; 4389 target_ulong rt_sf_addr, newsp = 0; 4390 int i, err = 0; 4391 int signal; 4392 4393 rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf)); 4394 if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1)) 4395 goto sigsegv; 4396 4397 signal = current_exec_domain_sig(sig); 4398 4399 err |= copy_siginfo_to_user(&rt_sf->info, info); 4400 4401 err |= __put_user(0, &rt_sf->uc.tuc_flags); 4402 err |= __put_user(0, &rt_sf->uc.tuc_link); 4403 err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp, 4404 &rt_sf->uc.tuc_stack.ss_sp); 4405 err |= __put_user(sas_ss_flags(env->gpr[1]), 4406 &rt_sf->uc.tuc_stack.ss_flags); 4407 err |= __put_user(target_sigaltstack_used.ss_size, 4408 &rt_sf->uc.tuc_stack.ss_size); 4409 err |= __put_user(h2g (&rt_sf->uc.tuc_mcontext), 4410 &rt_sf->uc.tuc_regs); 4411 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 4412 err |= __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]); 4413 } 4414 4415 frame = &rt_sf->uc.tuc_mcontext; 4416 err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn); 4417 4418 /* The kernel checks for the presence of a VDSO here. We don't 4419 emulate a vdso, so use a sigreturn system call. */ 4420 env->lr = (target_ulong) h2g(frame->tramp); 4421 4422 /* Turn off all fp exceptions. */ 4423 env->fpscr = 0; 4424 4425 /* Create a stack frame for the caller of the handler. */ 4426 newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16); 4427 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp); 4428 4429 if (err) 4430 goto sigsegv; 4431 4432 /* Set up registers for signal handler. */ 4433 env->gpr[1] = newsp; 4434 env->gpr[3] = (target_ulong) signal; 4435 env->gpr[4] = (target_ulong) h2g(&rt_sf->info); 4436 env->gpr[5] = (target_ulong) h2g(&rt_sf->uc); 4437 env->gpr[6] = (target_ulong) h2g(rt_sf); 4438 env->nip = (target_ulong) ka->_sa_handler; 4439 /* Signal handlers are entered in big-endian mode. */ 4440 env->msr &= ~MSR_LE; 4441 4442 unlock_user_struct(rt_sf, rt_sf_addr, 1); 4443 return; 4444 4445 sigsegv: 4446 unlock_user_struct(rt_sf, rt_sf_addr, 1); 4447 if (logfile) 4448 fprintf (logfile, "segfaulting from setup_rt_frame\n"); 4449 force_sig(TARGET_SIGSEGV); 4450 4451 } 4452 4453 long do_sigreturn(CPUState *env) 4454 { 4455 struct target_sigcontext *sc = NULL; 4456 struct target_mcontext *sr = NULL; 4457 target_ulong sr_addr, sc_addr; 4458 sigset_t blocked; 4459 target_sigset_t set; 4460 4461 sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE; 4462 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) 4463 goto sigsegv; 4464 4465 #if defined(TARGET_PPC64) 4466 set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32); 4467 #else 4468 if(__get_user(set.sig[0], &sc->oldmask) || 4469 __get_user(set.sig[1], &sc->_unused[3])) 4470 goto sigsegv; 4471 #endif 4472 target_to_host_sigset_internal(&blocked, &set); 4473 sigprocmask(SIG_SETMASK, &blocked, NULL); 4474 4475 if (__get_user(sr_addr, &sc->regs)) 4476 goto sigsegv; 4477 if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1)) 4478 goto sigsegv; 4479 if (restore_user_regs(env, sr, 1)) 4480 goto sigsegv; 4481 4482 unlock_user_struct(sr, sr_addr, 1); 4483 unlock_user_struct(sc, sc_addr, 1); 4484 return -TARGET_QEMU_ESIGRETURN; 4485 4486 sigsegv: 4487 unlock_user_struct(sr, sr_addr, 1); 4488 unlock_user_struct(sc, sc_addr, 1); 4489 if (logfile) 4490 fprintf (logfile, "segfaulting from do_sigreturn\n"); 4491 force_sig(TARGET_SIGSEGV); 4492 return 0; 4493 } 4494 4495 /* See arch/powerpc/kernel/signal_32.c. */ 4496 static int do_setcontext(struct target_ucontext *ucp, CPUState *env, int sig) 4497 { 4498 struct target_mcontext *mcp; 4499 target_ulong mcp_addr; 4500 sigset_t blocked; 4501 target_sigset_t set; 4502 4503 if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask), 4504 sizeof (set))) 4505 return 1; 4506 4507 #if defined(TARGET_PPC64) 4508 fprintf (stderr, "do_setcontext: not implemented\n"); 4509 return 0; 4510 #else 4511 if (__get_user(mcp_addr, &ucp->tuc_regs)) 4512 return 1; 4513 4514 if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1)) 4515 return 1; 4516 4517 target_to_host_sigset_internal(&blocked, &set); 4518 sigprocmask(SIG_SETMASK, &blocked, NULL); 4519 if (restore_user_regs(env, mcp, sig)) 4520 goto sigsegv; 4521 4522 unlock_user_struct(mcp, mcp_addr, 1); 4523 return 0; 4524 4525 sigsegv: 4526 unlock_user_struct(mcp, mcp_addr, 1); 4527 return 1; 4528 #endif 4529 } 4530 4531 long do_rt_sigreturn(CPUState *env) 4532 { 4533 struct target_rt_sigframe *rt_sf = NULL; 4534 target_ulong rt_sf_addr; 4535 4536 rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16; 4537 if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1)) 4538 goto sigsegv; 4539 4540 if (do_setcontext(&rt_sf->uc, env, 1)) 4541 goto sigsegv; 4542 4543 do_sigaltstack(rt_sf_addr 4544 + offsetof(struct target_rt_sigframe, uc.tuc_stack), 4545 0, env->gpr[1]); 4546 4547 unlock_user_struct(rt_sf, rt_sf_addr, 1); 4548 return -TARGET_QEMU_ESIGRETURN; 4549 4550 sigsegv: 4551 unlock_user_struct(rt_sf, rt_sf_addr, 1); 4552 if (logfile) 4553 fprintf (logfile, "segfaulting from do_rt_sigreturn\n"); 4554 force_sig(TARGET_SIGSEGV); 4555 return 0; 4556 } 4557 4558 #elif defined(TARGET_M68K) 4559 4560 struct target_sigcontext { 4561 abi_ulong sc_mask; 4562 abi_ulong sc_usp; 4563 abi_ulong sc_d0; 4564 abi_ulong sc_d1; 4565 abi_ulong sc_a0; 4566 abi_ulong sc_a1; 4567 unsigned short sc_sr; 4568 abi_ulong sc_pc; 4569 }; 4570 4571 struct target_sigframe 4572 { 4573 abi_ulong pretcode; 4574 int sig; 4575 int code; 4576 abi_ulong psc; 4577 char retcode[8]; 4578 abi_ulong extramask[TARGET_NSIG_WORDS-1]; 4579 struct target_sigcontext sc; 4580 }; 4581 4582 typedef int target_greg_t; 4583 #define TARGET_NGREG 18 4584 typedef target_greg_t target_gregset_t[TARGET_NGREG]; 4585 4586 typedef struct target_fpregset { 4587 int f_fpcntl[3]; 4588 int f_fpregs[8*3]; 4589 } target_fpregset_t; 4590 4591 struct target_mcontext { 4592 int version; 4593 target_gregset_t gregs; 4594 target_fpregset_t fpregs; 4595 }; 4596 4597 #define TARGET_MCONTEXT_VERSION 2 4598 4599 struct target_ucontext { 4600 abi_ulong tuc_flags; 4601 abi_ulong tuc_link; 4602 target_stack_t tuc_stack; 4603 struct target_mcontext tuc_mcontext; 4604 abi_long tuc_filler[80]; 4605 target_sigset_t tuc_sigmask; 4606 }; 4607 4608 struct target_rt_sigframe 4609 { 4610 abi_ulong pretcode; 4611 int sig; 4612 abi_ulong pinfo; 4613 abi_ulong puc; 4614 char retcode[8]; 4615 struct target_siginfo info; 4616 struct target_ucontext uc; 4617 }; 4618 4619 static int 4620 setup_sigcontext(struct target_sigcontext *sc, CPUState *env, abi_ulong mask) 4621 { 4622 int err = 0; 4623 4624 err |= __put_user(mask, &sc->sc_mask); 4625 err |= __put_user(env->aregs[7], &sc->sc_usp); 4626 err |= __put_user(env->dregs[0], &sc->sc_d0); 4627 err |= __put_user(env->dregs[1], &sc->sc_d1); 4628 err |= __put_user(env->aregs[0], &sc->sc_a0); 4629 err |= __put_user(env->aregs[1], &sc->sc_a1); 4630 err |= __put_user(env->sr, &sc->sc_sr); 4631 err |= __put_user(env->pc, &sc->sc_pc); 4632 4633 return err; 4634 } 4635 4636 static int 4637 restore_sigcontext(CPUState *env, struct target_sigcontext *sc, int *pd0) 4638 { 4639 int err = 0; 4640 int temp; 4641 4642 err |= __get_user(env->aregs[7], &sc->sc_usp); 4643 err |= __get_user(env->dregs[1], &sc->sc_d1); 4644 err |= __get_user(env->aregs[0], &sc->sc_a0); 4645 err |= __get_user(env->aregs[1], &sc->sc_a1); 4646 err |= __get_user(env->pc, &sc->sc_pc); 4647 err |= __get_user(temp, &sc->sc_sr); 4648 env->sr = (env->sr & 0xff00) | (temp & 0xff); 4649 4650 *pd0 = tswapl(sc->sc_d0); 4651 4652 return err; 4653 } 4654 4655 /* 4656 * Determine which stack to use.. 4657 */ 4658 static inline abi_ulong 4659 get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size) 4660 { 4661 unsigned long sp; 4662 4663 sp = regs->aregs[7]; 4664 4665 /* This is the X/Open sanctioned signal stack switching. */ 4666 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { 4667 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 4668 } 4669 4670 return ((sp - frame_size) & -8UL); 4671 } 4672 4673 static void setup_frame(int sig, struct target_sigaction *ka, 4674 target_sigset_t *set, CPUState *env) 4675 { 4676 struct target_sigframe *frame; 4677 abi_ulong frame_addr; 4678 abi_ulong retcode_addr; 4679 abi_ulong sc_addr; 4680 int err = 0; 4681 int i; 4682 4683 frame_addr = get_sigframe(ka, env, sizeof *frame); 4684 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 4685 goto give_sigsegv; 4686 4687 err |= __put_user(sig, &frame->sig); 4688 4689 sc_addr = frame_addr + offsetof(struct target_sigframe, sc); 4690 err |= __put_user(sc_addr, &frame->psc); 4691 4692 err |= setup_sigcontext(&frame->sc, env, set->sig[0]); 4693 if (err) 4694 goto give_sigsegv; 4695 4696 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 4697 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 4698 goto give_sigsegv; 4699 } 4700 4701 /* Set up to return from userspace. */ 4702 4703 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode); 4704 err |= __put_user(retcode_addr, &frame->pretcode); 4705 4706 /* moveq #,d0; trap #0 */ 4707 4708 err |= __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16), 4709 (long *)(frame->retcode)); 4710 4711 if (err) 4712 goto give_sigsegv; 4713 4714 /* Set up to return from userspace */ 4715 4716 env->aregs[7] = frame_addr; 4717 env->pc = ka->_sa_handler; 4718 4719 unlock_user_struct(frame, frame_addr, 1); 4720 return; 4721 4722 give_sigsegv: 4723 unlock_user_struct(frame, frame_addr, 1); 4724 force_sig(TARGET_SIGSEGV); 4725 } 4726 4727 static inline int target_rt_setup_ucontext(struct target_ucontext *uc, 4728 CPUState *env) 4729 { 4730 target_greg_t *gregs = uc->tuc_mcontext.gregs; 4731 int err; 4732 4733 err = __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version); 4734 err |= __put_user(env->dregs[0], &gregs[0]); 4735 err |= __put_user(env->dregs[1], &gregs[1]); 4736 err |= __put_user(env->dregs[2], &gregs[2]); 4737 err |= __put_user(env->dregs[3], &gregs[3]); 4738 err |= __put_user(env->dregs[4], &gregs[4]); 4739 err |= __put_user(env->dregs[5], &gregs[5]); 4740 err |= __put_user(env->dregs[6], &gregs[6]); 4741 err |= __put_user(env->dregs[7], &gregs[7]); 4742 err |= __put_user(env->aregs[0], &gregs[8]); 4743 err |= __put_user(env->aregs[1], &gregs[9]); 4744 err |= __put_user(env->aregs[2], &gregs[10]); 4745 err |= __put_user(env->aregs[3], &gregs[11]); 4746 err |= __put_user(env->aregs[4], &gregs[12]); 4747 err |= __put_user(env->aregs[5], &gregs[13]); 4748 err |= __put_user(env->aregs[6], &gregs[14]); 4749 err |= __put_user(env->aregs[7], &gregs[15]); 4750 err |= __put_user(env->pc, &gregs[16]); 4751 err |= __put_user(env->sr, &gregs[17]); 4752 4753 return err; 4754 } 4755 4756 static inline int target_rt_restore_ucontext(CPUState *env, 4757 struct target_ucontext *uc, 4758 int *pd0) 4759 { 4760 int temp; 4761 int err; 4762 target_greg_t *gregs = uc->tuc_mcontext.gregs; 4763 4764 err = __get_user(temp, &uc->tuc_mcontext.version); 4765 if (temp != TARGET_MCONTEXT_VERSION) 4766 goto badframe; 4767 4768 /* restore passed registers */ 4769 err |= __get_user(env->dregs[0], &gregs[0]); 4770 err |= __get_user(env->dregs[1], &gregs[1]); 4771 err |= __get_user(env->dregs[2], &gregs[2]); 4772 err |= __get_user(env->dregs[3], &gregs[3]); 4773 err |= __get_user(env->dregs[4], &gregs[4]); 4774 err |= __get_user(env->dregs[5], &gregs[5]); 4775 err |= __get_user(env->dregs[6], &gregs[6]); 4776 err |= __get_user(env->dregs[7], &gregs[7]); 4777 err |= __get_user(env->aregs[0], &gregs[8]); 4778 err |= __get_user(env->aregs[1], &gregs[9]); 4779 err |= __get_user(env->aregs[2], &gregs[10]); 4780 err |= __get_user(env->aregs[3], &gregs[11]); 4781 err |= __get_user(env->aregs[4], &gregs[12]); 4782 err |= __get_user(env->aregs[5], &gregs[13]); 4783 err |= __get_user(env->aregs[6], &gregs[14]); 4784 err |= __get_user(env->aregs[7], &gregs[15]); 4785 err |= __get_user(env->pc, &gregs[16]); 4786 err |= __get_user(temp, &gregs[17]); 4787 env->sr = (env->sr & 0xff00) | (temp & 0xff); 4788 4789 *pd0 = env->dregs[0]; 4790 return err; 4791 4792 badframe: 4793 return 1; 4794 } 4795 4796 static void setup_rt_frame(int sig, struct target_sigaction *ka, 4797 target_siginfo_t *info, 4798 target_sigset_t *set, CPUState *env) 4799 { 4800 struct target_rt_sigframe *frame; 4801 abi_ulong frame_addr; 4802 abi_ulong retcode_addr; 4803 abi_ulong info_addr; 4804 abi_ulong uc_addr; 4805 int err = 0; 4806 int i; 4807 4808 frame_addr = get_sigframe(ka, env, sizeof *frame); 4809 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 4810 goto give_sigsegv; 4811 4812 err |= __put_user(sig, &frame->sig); 4813 4814 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info); 4815 err |= __put_user(info_addr, &frame->pinfo); 4816 4817 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc); 4818 err |= __put_user(uc_addr, &frame->puc); 4819 4820 err |= copy_siginfo_to_user(&frame->info, info); 4821 4822 /* Create the ucontext */ 4823 4824 err |= __put_user(0, &frame->uc.tuc_flags); 4825 err |= __put_user(0, &frame->uc.tuc_link); 4826 err |= __put_user(target_sigaltstack_used.ss_sp, 4827 &frame->uc.tuc_stack.ss_sp); 4828 err |= __put_user(sas_ss_flags(env->aregs[7]), 4829 &frame->uc.tuc_stack.ss_flags); 4830 err |= __put_user(target_sigaltstack_used.ss_size, 4831 &frame->uc.tuc_stack.ss_size); 4832 err |= target_rt_setup_ucontext(&frame->uc, env); 4833 4834 if (err) 4835 goto give_sigsegv; 4836 4837 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 4838 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) 4839 goto give_sigsegv; 4840 } 4841 4842 /* Set up to return from userspace. */ 4843 4844 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode); 4845 err |= __put_user(retcode_addr, &frame->pretcode); 4846 4847 /* moveq #,d0; notb d0; trap #0 */ 4848 4849 err |= __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16), 4850 (long *)(frame->retcode + 0)); 4851 err |= __put_user(0x4e40, (short *)(frame->retcode + 4)); 4852 4853 if (err) 4854 goto give_sigsegv; 4855 4856 /* Set up to return from userspace */ 4857 4858 env->aregs[7] = frame_addr; 4859 env->pc = ka->_sa_handler; 4860 4861 unlock_user_struct(frame, frame_addr, 1); 4862 return; 4863 4864 give_sigsegv: 4865 unlock_user_struct(frame, frame_addr, 1); 4866 force_sig(TARGET_SIGSEGV); 4867 } 4868 4869 long do_sigreturn(CPUState *env) 4870 { 4871 struct target_sigframe *frame; 4872 abi_ulong frame_addr = env->aregs[7] - 4; 4873 target_sigset_t target_set; 4874 sigset_t set; 4875 int d0, i; 4876 4877 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 4878 goto badframe; 4879 4880 /* set blocked signals */ 4881 4882 if (__get_user(target_set.sig[0], &frame->sc.sc_mask)) 4883 goto badframe; 4884 4885 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 4886 if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) 4887 goto badframe; 4888 } 4889 4890 target_to_host_sigset_internal(&set, &target_set); 4891 sigprocmask(SIG_SETMASK, &set, NULL); 4892 4893 /* restore registers */ 4894 4895 if (restore_sigcontext(env, &frame->sc, &d0)) 4896 goto badframe; 4897 4898 unlock_user_struct(frame, frame_addr, 0); 4899 return d0; 4900 4901 badframe: 4902 unlock_user_struct(frame, frame_addr, 0); 4903 force_sig(TARGET_SIGSEGV); 4904 return 0; 4905 } 4906 4907 long do_rt_sigreturn(CPUState *env) 4908 { 4909 struct target_rt_sigframe *frame; 4910 abi_ulong frame_addr = env->aregs[7] - 4; 4911 target_sigset_t target_set; 4912 sigset_t set; 4913 int d0; 4914 4915 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 4916 goto badframe; 4917 4918 target_to_host_sigset_internal(&set, &target_set); 4919 sigprocmask(SIG_SETMASK, &set, NULL); 4920 4921 /* restore registers */ 4922 4923 if (target_rt_restore_ucontext(env, &frame->uc, &d0)) 4924 goto badframe; 4925 4926 if (do_sigaltstack(frame_addr + 4927 offsetof(struct target_rt_sigframe, uc.tuc_stack), 4928 0, get_sp_from_cpustate(env)) == -EFAULT) 4929 goto badframe; 4930 4931 unlock_user_struct(frame, frame_addr, 0); 4932 return d0; 4933 4934 badframe: 4935 unlock_user_struct(frame, frame_addr, 0); 4936 force_sig(TARGET_SIGSEGV); 4937 return 0; 4938 } 4939 4940 #elif defined(TARGET_ALPHA) 4941 4942 struct target_sigcontext { 4943 abi_long sc_onstack; 4944 abi_long sc_mask; 4945 abi_long sc_pc; 4946 abi_long sc_ps; 4947 abi_long sc_regs[32]; 4948 abi_long sc_ownedfp; 4949 abi_long sc_fpregs[32]; 4950 abi_ulong sc_fpcr; 4951 abi_ulong sc_fp_control; 4952 abi_ulong sc_reserved1; 4953 abi_ulong sc_reserved2; 4954 abi_ulong sc_ssize; 4955 abi_ulong sc_sbase; 4956 abi_ulong sc_traparg_a0; 4957 abi_ulong sc_traparg_a1; 4958 abi_ulong sc_traparg_a2; 4959 abi_ulong sc_fp_trap_pc; 4960 abi_ulong sc_fp_trigger_sum; 4961 abi_ulong sc_fp_trigger_inst; 4962 }; 4963 4964 struct target_ucontext { 4965 abi_ulong tuc_flags; 4966 abi_ulong tuc_link; 4967 abi_ulong tuc_osf_sigmask; 4968 target_stack_t tuc_stack; 4969 struct target_sigcontext tuc_mcontext; 4970 target_sigset_t tuc_sigmask; 4971 }; 4972 4973 struct target_sigframe { 4974 struct target_sigcontext sc; 4975 unsigned int retcode[3]; 4976 }; 4977 4978 struct target_rt_sigframe { 4979 target_siginfo_t info; 4980 struct target_ucontext uc; 4981 unsigned int retcode[3]; 4982 }; 4983 4984 #define INSN_MOV_R30_R16 0x47fe0410 4985 #define INSN_LDI_R0 0x201f0000 4986 #define INSN_CALLSYS 0x00000083 4987 4988 static int setup_sigcontext(struct target_sigcontext *sc, CPUState *env, 4989 abi_ulong frame_addr, target_sigset_t *set) 4990 { 4991 int i, err = 0; 4992 4993 err |= __put_user(on_sig_stack(frame_addr), &sc->sc_onstack); 4994 err |= __put_user(set->sig[0], &sc->sc_mask); 4995 err |= __put_user(env->pc, &sc->sc_pc); 4996 err |= __put_user(8, &sc->sc_ps); 4997 4998 for (i = 0; i < 31; ++i) { 4999 err |= __put_user(env->ir[i], &sc->sc_regs[i]); 5000 } 5001 err |= __put_user(0, &sc->sc_regs[31]); 5002 5003 for (i = 0; i < 31; ++i) { 5004 err |= __put_user(env->fir[i], &sc->sc_fpregs[i]); 5005 } 5006 err |= __put_user(0, &sc->sc_fpregs[31]); 5007 err |= __put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr); 5008 5009 err |= __put_user(0, &sc->sc_traparg_a0); /* FIXME */ 5010 err |= __put_user(0, &sc->sc_traparg_a1); /* FIXME */ 5011 err |= __put_user(0, &sc->sc_traparg_a2); /* FIXME */ 5012 5013 return err; 5014 } 5015 5016 static int restore_sigcontext(CPUState *env, struct target_sigcontext *sc) 5017 { 5018 uint64_t fpcr; 5019 int i, err = 0; 5020 5021 err |= __get_user(env->pc, &sc->sc_pc); 5022 5023 for (i = 0; i < 31; ++i) { 5024 err |= __get_user(env->ir[i], &sc->sc_regs[i]); 5025 } 5026 for (i = 0; i < 31; ++i) { 5027 err |= __get_user(env->fir[i], &sc->sc_fpregs[i]); 5028 } 5029 5030 err |= __get_user(fpcr, &sc->sc_fpcr); 5031 cpu_alpha_store_fpcr(env, fpcr); 5032 5033 return err; 5034 } 5035 5036 static inline abi_ulong get_sigframe(struct target_sigaction *sa, 5037 CPUState *env, unsigned long framesize) 5038 { 5039 abi_ulong sp = env->ir[IR_SP]; 5040 5041 /* This is the X/Open sanctioned signal stack switching. */ 5042 if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) { 5043 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 5044 } 5045 return (sp - framesize) & -32; 5046 } 5047 5048 static void setup_frame(int sig, struct target_sigaction *ka, 5049 target_sigset_t *set, CPUState *env) 5050 { 5051 abi_ulong frame_addr, r26; 5052 struct target_sigframe *frame; 5053 int err = 0; 5054 5055 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 5056 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { 5057 goto give_sigsegv; 5058 } 5059 5060 err |= setup_sigcontext(&frame->sc, env, frame_addr, set); 5061 5062 if (ka->sa_restorer) { 5063 r26 = ka->sa_restorer; 5064 } else { 5065 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]); 5066 err |= __put_user(INSN_LDI_R0 + TARGET_NR_sigreturn, 5067 &frame->retcode[1]); 5068 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]); 5069 /* imb() */ 5070 r26 = frame_addr; 5071 } 5072 5073 unlock_user_struct(frame, frame_addr, 1); 5074 5075 if (err) { 5076 give_sigsegv: 5077 if (sig == TARGET_SIGSEGV) { 5078 ka->_sa_handler = TARGET_SIG_DFL; 5079 } 5080 force_sig(TARGET_SIGSEGV); 5081 } 5082 5083 env->ir[IR_RA] = r26; 5084 env->ir[IR_PV] = env->pc = ka->_sa_handler; 5085 env->ir[IR_A0] = sig; 5086 env->ir[IR_A1] = 0; 5087 env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc); 5088 env->ir[IR_SP] = frame_addr; 5089 } 5090 5091 static void setup_rt_frame(int sig, struct target_sigaction *ka, 5092 target_siginfo_t *info, 5093 target_sigset_t *set, CPUState *env) 5094 { 5095 abi_ulong frame_addr, r26; 5096 struct target_rt_sigframe *frame; 5097 int i, err = 0; 5098 5099 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 5100 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { 5101 goto give_sigsegv; 5102 } 5103 5104 err |= copy_siginfo_to_user(&frame->info, info); 5105 5106 err |= __put_user(0, &frame->uc.tuc_flags); 5107 err |= __put_user(0, &frame->uc.tuc_link); 5108 err |= __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask); 5109 err |= __put_user(target_sigaltstack_used.ss_sp, 5110 &frame->uc.tuc_stack.ss_sp); 5111 err |= __put_user(sas_ss_flags(env->ir[IR_SP]), 5112 &frame->uc.tuc_stack.ss_flags); 5113 err |= __put_user(target_sigaltstack_used.ss_size, 5114 &frame->uc.tuc_stack.ss_size); 5115 err |= setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set); 5116 for (i = 0; i < TARGET_NSIG_WORDS; ++i) { 5117 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); 5118 } 5119 5120 if (ka->sa_restorer) { 5121 r26 = ka->sa_restorer; 5122 } else { 5123 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]); 5124 err |= __put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn, 5125 &frame->retcode[1]); 5126 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]); 5127 /* imb(); */ 5128 r26 = frame_addr; 5129 } 5130 5131 if (err) { 5132 give_sigsegv: 5133 if (sig == TARGET_SIGSEGV) { 5134 ka->_sa_handler = TARGET_SIG_DFL; 5135 } 5136 force_sig(TARGET_SIGSEGV); 5137 } 5138 5139 env->ir[IR_RA] = r26; 5140 env->ir[IR_PV] = env->pc = ka->_sa_handler; 5141 env->ir[IR_A0] = sig; 5142 env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info); 5143 env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc); 5144 env->ir[IR_SP] = frame_addr; 5145 } 5146 5147 long do_sigreturn(CPUState *env) 5148 { 5149 struct target_sigcontext *sc; 5150 abi_ulong sc_addr = env->ir[IR_A0]; 5151 target_sigset_t target_set; 5152 sigset_t set; 5153 5154 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) { 5155 goto badframe; 5156 } 5157 5158 target_sigemptyset(&target_set); 5159 if (__get_user(target_set.sig[0], &sc->sc_mask)) { 5160 goto badframe; 5161 } 5162 5163 target_to_host_sigset_internal(&set, &target_set); 5164 sigprocmask(SIG_SETMASK, &set, NULL); 5165 5166 if (restore_sigcontext(env, sc)) { 5167 goto badframe; 5168 } 5169 unlock_user_struct(sc, sc_addr, 0); 5170 return env->ir[IR_V0]; 5171 5172 badframe: 5173 unlock_user_struct(sc, sc_addr, 0); 5174 force_sig(TARGET_SIGSEGV); 5175 } 5176 5177 long do_rt_sigreturn(CPUState *env) 5178 { 5179 abi_ulong frame_addr = env->ir[IR_A0]; 5180 struct target_rt_sigframe *frame; 5181 sigset_t set; 5182 5183 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { 5184 goto badframe; 5185 } 5186 target_to_host_sigset(&set, &frame->uc.tuc_sigmask); 5187 sigprocmask(SIG_SETMASK, &set, NULL); 5188 5189 if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) { 5190 goto badframe; 5191 } 5192 if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, 5193 uc.tuc_stack), 5194 0, env->ir[IR_SP]) == -EFAULT) { 5195 goto badframe; 5196 } 5197 5198 unlock_user_struct(frame, frame_addr, 0); 5199 return env->ir[IR_V0]; 5200 5201 5202 badframe: 5203 unlock_user_struct(frame, frame_addr, 0); 5204 force_sig(TARGET_SIGSEGV); 5205 } 5206 5207 #else 5208 5209 static void setup_frame(int sig, struct target_sigaction *ka, 5210 target_sigset_t *set, CPUState *env) 5211 { 5212 fprintf(stderr, "setup_frame: not implemented\n"); 5213 } 5214 5215 static void setup_rt_frame(int sig, struct target_sigaction *ka, 5216 target_siginfo_t *info, 5217 target_sigset_t *set, CPUState *env) 5218 { 5219 fprintf(stderr, "setup_rt_frame: not implemented\n"); 5220 } 5221 5222 long do_sigreturn(CPUState *env) 5223 { 5224 fprintf(stderr, "do_sigreturn: not implemented\n"); 5225 return -TARGET_ENOSYS; 5226 } 5227 5228 long do_rt_sigreturn(CPUState *env) 5229 { 5230 fprintf(stderr, "do_rt_sigreturn: not implemented\n"); 5231 return -TARGET_ENOSYS; 5232 } 5233 5234 #endif 5235 5236 void process_pending_signals(CPUState *cpu_env) 5237 { 5238 int sig; 5239 abi_ulong handler; 5240 sigset_t set, old_set; 5241 target_sigset_t target_old_set; 5242 struct emulated_sigtable *k; 5243 struct target_sigaction *sa; 5244 struct sigqueue *q; 5245 TaskState *ts = cpu_env->opaque; 5246 5247 if (!ts->signal_pending) 5248 return; 5249 5250 /* FIXME: This is not threadsafe. */ 5251 k = ts->sigtab; 5252 for(sig = 1; sig <= TARGET_NSIG; sig++) { 5253 if (k->pending) 5254 goto handle_signal; 5255 k++; 5256 } 5257 /* if no signal is pending, just return */ 5258 ts->signal_pending = 0; 5259 return; 5260 5261 handle_signal: 5262 #ifdef DEBUG_SIGNAL 5263 fprintf(stderr, "qemu: process signal %d\n", sig); 5264 #endif 5265 /* dequeue signal */ 5266 q = k->first; 5267 k->first = q->next; 5268 if (!k->first) 5269 k->pending = 0; 5270 5271 sig = gdb_handlesig (cpu_env, sig); 5272 if (!sig) { 5273 sa = NULL; 5274 handler = TARGET_SIG_IGN; 5275 } else { 5276 sa = &sigact_table[sig - 1]; 5277 handler = sa->_sa_handler; 5278 } 5279 5280 if (handler == TARGET_SIG_DFL) { 5281 /* default handler : ignore some signal. The other are job control or fatal */ 5282 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) { 5283 kill(getpid(),SIGSTOP); 5284 } else if (sig != TARGET_SIGCHLD && 5285 sig != TARGET_SIGURG && 5286 sig != TARGET_SIGWINCH && 5287 sig != TARGET_SIGCONT) { 5288 force_sig(sig); 5289 } 5290 } else if (handler == TARGET_SIG_IGN) { 5291 /* ignore sig */ 5292 } else if (handler == TARGET_SIG_ERR) { 5293 force_sig(sig); 5294 } else { 5295 /* compute the blocked signals during the handler execution */ 5296 target_to_host_sigset(&set, &sa->sa_mask); 5297 /* SA_NODEFER indicates that the current signal should not be 5298 blocked during the handler */ 5299 if (!(sa->sa_flags & TARGET_SA_NODEFER)) 5300 sigaddset(&set, target_to_host_signal(sig)); 5301 5302 /* block signals in the handler using Linux */ 5303 sigprocmask(SIG_BLOCK, &set, &old_set); 5304 /* save the previous blocked signal state to restore it at the 5305 end of the signal execution (see do_sigreturn) */ 5306 host_to_target_sigset_internal(&target_old_set, &old_set); 5307 5308 /* if the CPU is in VM86 mode, we restore the 32 bit values */ 5309 #if defined(TARGET_I386) && !defined(TARGET_X86_64) 5310 { 5311 CPUX86State *env = cpu_env; 5312 if (env->eflags & VM_MASK) 5313 save_v86_state(env); 5314 } 5315 #endif 5316 /* prepare the stack frame of the virtual CPU */ 5317 if (sa->sa_flags & TARGET_SA_SIGINFO) 5318 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env); 5319 else 5320 setup_frame(sig, sa, &target_old_set, cpu_env); 5321 if (sa->sa_flags & TARGET_SA_RESETHAND) 5322 sa->_sa_handler = TARGET_SIG_DFL; 5323 } 5324 if (q != &k->info) 5325 free_sigqueue(cpu_env, q); 5326 } 5327