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(CPUArchState *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(CPUArchState *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(CPUArchState *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(CPUARMState *regs) 1209 { 1210 return 1; 1211 } 1212 1213 static void 1214 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ 1215 CPUARMState *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, CPUARMState *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(CPUARMState *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, CPUARMState *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, 1316 CPUARMState *env) 1317 { 1318 int i; 1319 struct target_iwmmxt_sigframe *iwmmxtframe; 1320 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace; 1321 __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic); 1322 __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size); 1323 for (i = 0; i < 16; i++) { 1324 __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]); 1325 } 1326 __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf); 1327 __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf); 1328 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0); 1329 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1); 1330 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2); 1331 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3); 1332 return (abi_ulong*)(iwmmxtframe+1); 1333 } 1334 1335 static void setup_sigframe_v2(struct target_ucontext_v2 *uc, 1336 target_sigset_t *set, CPUARMState *env) 1337 { 1338 struct target_sigaltstack stack; 1339 int i; 1340 abi_ulong *regspace; 1341 1342 /* Clear all the bits of the ucontext we don't use. */ 1343 memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); 1344 1345 memset(&stack, 0, sizeof(stack)); 1346 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); 1347 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); 1348 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); 1349 memcpy(&uc->tuc_stack, &stack, sizeof(stack)); 1350 1351 setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]); 1352 /* Save coprocessor signal frame. */ 1353 regspace = uc->tuc_regspace; 1354 if (arm_feature(env, ARM_FEATURE_VFP)) { 1355 regspace = setup_sigframe_v2_vfp(regspace, env); 1356 } 1357 if (arm_feature(env, ARM_FEATURE_IWMMXT)) { 1358 regspace = setup_sigframe_v2_iwmmxt(regspace, env); 1359 } 1360 1361 /* Write terminating magic word */ 1362 __put_user(0, regspace); 1363 1364 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 1365 __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]); 1366 } 1367 } 1368 1369 /* compare linux/arch/arm/kernel/signal.c:setup_frame() */ 1370 static void setup_frame_v1(int usig, struct target_sigaction *ka, 1371 target_sigset_t *set, CPUARMState *regs) 1372 { 1373 struct sigframe_v1 *frame; 1374 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); 1375 int i; 1376 1377 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 1378 return; 1379 1380 setup_sigcontext(&frame->sc, regs, set->sig[0]); 1381 1382 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 1383 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 1384 goto end; 1385 } 1386 1387 setup_return(regs, ka, &frame->retcode, frame_addr, usig, 1388 frame_addr + offsetof(struct sigframe_v1, retcode)); 1389 1390 end: 1391 unlock_user_struct(frame, frame_addr, 1); 1392 } 1393 1394 static void setup_frame_v2(int usig, struct target_sigaction *ka, 1395 target_sigset_t *set, CPUARMState *regs) 1396 { 1397 struct sigframe_v2 *frame; 1398 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); 1399 1400 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 1401 return; 1402 1403 setup_sigframe_v2(&frame->uc, set, regs); 1404 1405 setup_return(regs, ka, &frame->retcode, frame_addr, usig, 1406 frame_addr + offsetof(struct sigframe_v2, retcode)); 1407 1408 unlock_user_struct(frame, frame_addr, 1); 1409 } 1410 1411 static void setup_frame(int usig, struct target_sigaction *ka, 1412 target_sigset_t *set, CPUARMState *regs) 1413 { 1414 if (get_osversion() >= 0x020612) { 1415 setup_frame_v2(usig, ka, set, regs); 1416 } else { 1417 setup_frame_v1(usig, ka, set, regs); 1418 } 1419 } 1420 1421 /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */ 1422 static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, 1423 target_siginfo_t *info, 1424 target_sigset_t *set, CPUARMState *env) 1425 { 1426 struct rt_sigframe_v1 *frame; 1427 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); 1428 struct target_sigaltstack stack; 1429 int i; 1430 abi_ulong info_addr, uc_addr; 1431 1432 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 1433 return /* 1 */; 1434 1435 info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info); 1436 __put_user(info_addr, &frame->pinfo); 1437 uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc); 1438 __put_user(uc_addr, &frame->puc); 1439 copy_siginfo_to_user(&frame->info, info); 1440 1441 /* Clear all the bits of the ucontext we don't use. */ 1442 memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext)); 1443 1444 memset(&stack, 0, sizeof(stack)); 1445 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); 1446 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); 1447 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); 1448 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack)); 1449 1450 setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]); 1451 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 1452 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) 1453 goto end; 1454 } 1455 1456 setup_return(env, ka, &frame->retcode, frame_addr, usig, 1457 frame_addr + offsetof(struct rt_sigframe_v1, retcode)); 1458 1459 env->regs[1] = info_addr; 1460 env->regs[2] = uc_addr; 1461 1462 end: 1463 unlock_user_struct(frame, frame_addr, 1); 1464 } 1465 1466 static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, 1467 target_siginfo_t *info, 1468 target_sigset_t *set, CPUARMState *env) 1469 { 1470 struct rt_sigframe_v2 *frame; 1471 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); 1472 abi_ulong info_addr, uc_addr; 1473 1474 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 1475 return /* 1 */; 1476 1477 info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info); 1478 uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc); 1479 copy_siginfo_to_user(&frame->info, info); 1480 1481 setup_sigframe_v2(&frame->uc, set, env); 1482 1483 setup_return(env, ka, &frame->retcode, frame_addr, usig, 1484 frame_addr + offsetof(struct rt_sigframe_v2, retcode)); 1485 1486 env->regs[1] = info_addr; 1487 env->regs[2] = uc_addr; 1488 1489 unlock_user_struct(frame, frame_addr, 1); 1490 } 1491 1492 static void setup_rt_frame(int usig, struct target_sigaction *ka, 1493 target_siginfo_t *info, 1494 target_sigset_t *set, CPUARMState *env) 1495 { 1496 if (get_osversion() >= 0x020612) { 1497 setup_rt_frame_v2(usig, ka, info, set, env); 1498 } else { 1499 setup_rt_frame_v1(usig, ka, info, set, env); 1500 } 1501 } 1502 1503 static int 1504 restore_sigcontext(CPUARMState *env, struct target_sigcontext *sc) 1505 { 1506 int err = 0; 1507 uint32_t cpsr; 1508 1509 __get_user_error(env->regs[0], &sc->arm_r0, err); 1510 __get_user_error(env->regs[1], &sc->arm_r1, err); 1511 __get_user_error(env->regs[2], &sc->arm_r2, err); 1512 __get_user_error(env->regs[3], &sc->arm_r3, err); 1513 __get_user_error(env->regs[4], &sc->arm_r4, err); 1514 __get_user_error(env->regs[5], &sc->arm_r5, err); 1515 __get_user_error(env->regs[6], &sc->arm_r6, err); 1516 __get_user_error(env->regs[7], &sc->arm_r7, err); 1517 __get_user_error(env->regs[8], &sc->arm_r8, err); 1518 __get_user_error(env->regs[9], &sc->arm_r9, err); 1519 __get_user_error(env->regs[10], &sc->arm_r10, err); 1520 __get_user_error(env->regs[11], &sc->arm_fp, err); 1521 __get_user_error(env->regs[12], &sc->arm_ip, err); 1522 __get_user_error(env->regs[13], &sc->arm_sp, err); 1523 __get_user_error(env->regs[14], &sc->arm_lr, err); 1524 __get_user_error(env->regs[15], &sc->arm_pc, err); 1525 #ifdef TARGET_CONFIG_CPU_32 1526 __get_user_error(cpsr, &sc->arm_cpsr, err); 1527 cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC); 1528 #endif 1529 1530 err |= !valid_user_regs(env); 1531 1532 return err; 1533 } 1534 1535 static long do_sigreturn_v1(CPUARMState *env) 1536 { 1537 abi_ulong frame_addr; 1538 struct sigframe_v1 *frame; 1539 target_sigset_t set; 1540 sigset_t host_set; 1541 int i; 1542 1543 /* 1544 * Since we stacked the signal on a 64-bit boundary, 1545 * then 'sp' should be word aligned here. If it's 1546 * not, then the user is trying to mess with us. 1547 */ 1548 if (env->regs[13] & 7) 1549 goto badframe; 1550 1551 frame_addr = env->regs[13]; 1552 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1553 goto badframe; 1554 1555 if (__get_user(set.sig[0], &frame->sc.oldmask)) 1556 goto badframe; 1557 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 1558 if (__get_user(set.sig[i], &frame->extramask[i - 1])) 1559 goto badframe; 1560 } 1561 1562 target_to_host_sigset_internal(&host_set, &set); 1563 sigprocmask(SIG_SETMASK, &host_set, NULL); 1564 1565 if (restore_sigcontext(env, &frame->sc)) 1566 goto badframe; 1567 1568 #if 0 1569 /* Send SIGTRAP if we're single-stepping */ 1570 if (ptrace_cancel_bpt(current)) 1571 send_sig(SIGTRAP, current, 1); 1572 #endif 1573 unlock_user_struct(frame, frame_addr, 0); 1574 return env->regs[0]; 1575 1576 badframe: 1577 unlock_user_struct(frame, frame_addr, 0); 1578 force_sig(TARGET_SIGSEGV /* , current */); 1579 return 0; 1580 } 1581 1582 static abi_ulong *restore_sigframe_v2_vfp(CPUARMState *env, abi_ulong *regspace) 1583 { 1584 int i; 1585 abi_ulong magic, sz; 1586 uint32_t fpscr, fpexc; 1587 struct target_vfp_sigframe *vfpframe; 1588 vfpframe = (struct target_vfp_sigframe *)regspace; 1589 1590 __get_user(magic, &vfpframe->magic); 1591 __get_user(sz, &vfpframe->size); 1592 if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) { 1593 return 0; 1594 } 1595 for (i = 0; i < 32; i++) { 1596 __get_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]); 1597 } 1598 __get_user(fpscr, &vfpframe->ufp.fpscr); 1599 vfp_set_fpscr(env, fpscr); 1600 __get_user(fpexc, &vfpframe->ufp_exc.fpexc); 1601 /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid 1602 * and the exception flag is cleared 1603 */ 1604 fpexc |= (1 << 30); 1605 fpexc &= ~((1 << 31) | (1 << 28)); 1606 env->vfp.xregs[ARM_VFP_FPEXC] = fpexc; 1607 __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst); 1608 __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2); 1609 return (abi_ulong*)(vfpframe + 1); 1610 } 1611 1612 static abi_ulong *restore_sigframe_v2_iwmmxt(CPUARMState *env, 1613 abi_ulong *regspace) 1614 { 1615 int i; 1616 abi_ulong magic, sz; 1617 struct target_iwmmxt_sigframe *iwmmxtframe; 1618 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace; 1619 1620 __get_user(magic, &iwmmxtframe->magic); 1621 __get_user(sz, &iwmmxtframe->size); 1622 if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) { 1623 return 0; 1624 } 1625 for (i = 0; i < 16; i++) { 1626 __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]); 1627 } 1628 __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf); 1629 __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf); 1630 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0); 1631 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1); 1632 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2); 1633 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3); 1634 return (abi_ulong*)(iwmmxtframe + 1); 1635 } 1636 1637 static int do_sigframe_return_v2(CPUARMState *env, target_ulong frame_addr, 1638 struct target_ucontext_v2 *uc) 1639 { 1640 sigset_t host_set; 1641 abi_ulong *regspace; 1642 1643 target_to_host_sigset(&host_set, &uc->tuc_sigmask); 1644 sigprocmask(SIG_SETMASK, &host_set, NULL); 1645 1646 if (restore_sigcontext(env, &uc->tuc_mcontext)) 1647 return 1; 1648 1649 /* Restore coprocessor signal frame */ 1650 regspace = uc->tuc_regspace; 1651 if (arm_feature(env, ARM_FEATURE_VFP)) { 1652 regspace = restore_sigframe_v2_vfp(env, regspace); 1653 if (!regspace) { 1654 return 1; 1655 } 1656 } 1657 if (arm_feature(env, ARM_FEATURE_IWMMXT)) { 1658 regspace = restore_sigframe_v2_iwmmxt(env, regspace); 1659 if (!regspace) { 1660 return 1; 1661 } 1662 } 1663 1664 if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) 1665 return 1; 1666 1667 #if 0 1668 /* Send SIGTRAP if we're single-stepping */ 1669 if (ptrace_cancel_bpt(current)) 1670 send_sig(SIGTRAP, current, 1); 1671 #endif 1672 1673 return 0; 1674 } 1675 1676 static long do_sigreturn_v2(CPUARMState *env) 1677 { 1678 abi_ulong frame_addr; 1679 struct sigframe_v2 *frame; 1680 1681 /* 1682 * Since we stacked the signal on a 64-bit boundary, 1683 * then 'sp' should be word aligned here. If it's 1684 * not, then the user is trying to mess with us. 1685 */ 1686 if (env->regs[13] & 7) 1687 goto badframe; 1688 1689 frame_addr = env->regs[13]; 1690 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1691 goto badframe; 1692 1693 if (do_sigframe_return_v2(env, frame_addr, &frame->uc)) 1694 goto badframe; 1695 1696 unlock_user_struct(frame, frame_addr, 0); 1697 return env->regs[0]; 1698 1699 badframe: 1700 unlock_user_struct(frame, frame_addr, 0); 1701 force_sig(TARGET_SIGSEGV /* , current */); 1702 return 0; 1703 } 1704 1705 long do_sigreturn(CPUARMState *env) 1706 { 1707 if (get_osversion() >= 0x020612) { 1708 return do_sigreturn_v2(env); 1709 } else { 1710 return do_sigreturn_v1(env); 1711 } 1712 } 1713 1714 static long do_rt_sigreturn_v1(CPUARMState *env) 1715 { 1716 abi_ulong frame_addr; 1717 struct rt_sigframe_v1 *frame; 1718 sigset_t host_set; 1719 1720 /* 1721 * Since we stacked the signal on a 64-bit boundary, 1722 * then 'sp' should be word aligned here. If it's 1723 * not, then the user is trying to mess with us. 1724 */ 1725 if (env->regs[13] & 7) 1726 goto badframe; 1727 1728 frame_addr = env->regs[13]; 1729 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1730 goto badframe; 1731 1732 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); 1733 sigprocmask(SIG_SETMASK, &host_set, NULL); 1734 1735 if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) 1736 goto badframe; 1737 1738 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) 1739 goto badframe; 1740 1741 #if 0 1742 /* Send SIGTRAP if we're single-stepping */ 1743 if (ptrace_cancel_bpt(current)) 1744 send_sig(SIGTRAP, current, 1); 1745 #endif 1746 unlock_user_struct(frame, frame_addr, 0); 1747 return env->regs[0]; 1748 1749 badframe: 1750 unlock_user_struct(frame, frame_addr, 0); 1751 force_sig(TARGET_SIGSEGV /* , current */); 1752 return 0; 1753 } 1754 1755 static long do_rt_sigreturn_v2(CPUARMState *env) 1756 { 1757 abi_ulong frame_addr; 1758 struct rt_sigframe_v2 *frame; 1759 1760 /* 1761 * Since we stacked the signal on a 64-bit boundary, 1762 * then 'sp' should be word aligned here. If it's 1763 * not, then the user is trying to mess with us. 1764 */ 1765 if (env->regs[13] & 7) 1766 goto badframe; 1767 1768 frame_addr = env->regs[13]; 1769 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1770 goto badframe; 1771 1772 if (do_sigframe_return_v2(env, frame_addr, &frame->uc)) 1773 goto badframe; 1774 1775 unlock_user_struct(frame, frame_addr, 0); 1776 return env->regs[0]; 1777 1778 badframe: 1779 unlock_user_struct(frame, frame_addr, 0); 1780 force_sig(TARGET_SIGSEGV /* , current */); 1781 return 0; 1782 } 1783 1784 long do_rt_sigreturn(CPUARMState *env) 1785 { 1786 if (get_osversion() >= 0x020612) { 1787 return do_rt_sigreturn_v2(env); 1788 } else { 1789 return do_rt_sigreturn_v1(env); 1790 } 1791 } 1792 1793 #elif defined(TARGET_SPARC) 1794 1795 #define __SUNOS_MAXWIN 31 1796 1797 /* This is what SunOS does, so shall I. */ 1798 struct target_sigcontext { 1799 abi_ulong sigc_onstack; /* state to restore */ 1800 1801 abi_ulong sigc_mask; /* sigmask to restore */ 1802 abi_ulong sigc_sp; /* stack pointer */ 1803 abi_ulong sigc_pc; /* program counter */ 1804 abi_ulong sigc_npc; /* next program counter */ 1805 abi_ulong sigc_psr; /* for condition codes etc */ 1806 abi_ulong sigc_g1; /* User uses these two registers */ 1807 abi_ulong sigc_o0; /* within the trampoline code. */ 1808 1809 /* Now comes information regarding the users window set 1810 * at the time of the signal. 1811 */ 1812 abi_ulong sigc_oswins; /* outstanding windows */ 1813 1814 /* stack ptrs for each regwin buf */ 1815 char *sigc_spbuf[__SUNOS_MAXWIN]; 1816 1817 /* Windows to restore after signal */ 1818 struct { 1819 abi_ulong locals[8]; 1820 abi_ulong ins[8]; 1821 } sigc_wbuf[__SUNOS_MAXWIN]; 1822 }; 1823 /* A Sparc stack frame */ 1824 struct sparc_stackf { 1825 abi_ulong locals[8]; 1826 abi_ulong ins[8]; 1827 /* It's simpler to treat fp and callers_pc as elements of ins[] 1828 * since we never need to access them ourselves. 1829 */ 1830 char *structptr; 1831 abi_ulong xargs[6]; 1832 abi_ulong xxargs[1]; 1833 }; 1834 1835 typedef struct { 1836 struct { 1837 abi_ulong psr; 1838 abi_ulong pc; 1839 abi_ulong npc; 1840 abi_ulong y; 1841 abi_ulong u_regs[16]; /* globals and ins */ 1842 } si_regs; 1843 int si_mask; 1844 } __siginfo_t; 1845 1846 typedef struct { 1847 unsigned long si_float_regs [32]; 1848 unsigned long si_fsr; 1849 unsigned long si_fpqdepth; 1850 struct { 1851 unsigned long *insn_addr; 1852 unsigned long insn; 1853 } si_fpqueue [16]; 1854 } qemu_siginfo_fpu_t; 1855 1856 1857 struct target_signal_frame { 1858 struct sparc_stackf ss; 1859 __siginfo_t info; 1860 abi_ulong fpu_save; 1861 abi_ulong insns[2] __attribute__ ((aligned (8))); 1862 abi_ulong extramask[TARGET_NSIG_WORDS - 1]; 1863 abi_ulong extra_size; /* Should be 0 */ 1864 qemu_siginfo_fpu_t fpu_state; 1865 }; 1866 struct target_rt_signal_frame { 1867 struct sparc_stackf ss; 1868 siginfo_t info; 1869 abi_ulong regs[20]; 1870 sigset_t mask; 1871 abi_ulong fpu_save; 1872 unsigned int insns[2]; 1873 stack_t stack; 1874 unsigned int extra_size; /* Should be 0 */ 1875 qemu_siginfo_fpu_t fpu_state; 1876 }; 1877 1878 #define UREG_O0 16 1879 #define UREG_O6 22 1880 #define UREG_I0 0 1881 #define UREG_I1 1 1882 #define UREG_I2 2 1883 #define UREG_I3 3 1884 #define UREG_I4 4 1885 #define UREG_I5 5 1886 #define UREG_I6 6 1887 #define UREG_I7 7 1888 #define UREG_L0 8 1889 #define UREG_FP UREG_I6 1890 #define UREG_SP UREG_O6 1891 1892 static inline abi_ulong get_sigframe(struct target_sigaction *sa, 1893 CPUSPARCState *env, 1894 unsigned long framesize) 1895 { 1896 abi_ulong sp; 1897 1898 sp = env->regwptr[UREG_FP]; 1899 1900 /* This is the X/Open sanctioned signal stack switching. */ 1901 if (sa->sa_flags & TARGET_SA_ONSTACK) { 1902 if (!on_sig_stack(sp) 1903 && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7)) 1904 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 1905 } 1906 return sp - framesize; 1907 } 1908 1909 static int 1910 setup___siginfo(__siginfo_t *si, CPUSPARCState *env, abi_ulong mask) 1911 { 1912 int err = 0, i; 1913 1914 err |= __put_user(env->psr, &si->si_regs.psr); 1915 err |= __put_user(env->pc, &si->si_regs.pc); 1916 err |= __put_user(env->npc, &si->si_regs.npc); 1917 err |= __put_user(env->y, &si->si_regs.y); 1918 for (i=0; i < 8; i++) { 1919 err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]); 1920 } 1921 for (i=0; i < 8; i++) { 1922 err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]); 1923 } 1924 err |= __put_user(mask, &si->si_mask); 1925 return err; 1926 } 1927 1928 #if 0 1929 static int 1930 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ 1931 CPUSPARCState *env, unsigned long mask) 1932 { 1933 int err = 0; 1934 1935 err |= __put_user(mask, &sc->sigc_mask); 1936 err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp); 1937 err |= __put_user(env->pc, &sc->sigc_pc); 1938 err |= __put_user(env->npc, &sc->sigc_npc); 1939 err |= __put_user(env->psr, &sc->sigc_psr); 1940 err |= __put_user(env->gregs[1], &sc->sigc_g1); 1941 err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0); 1942 1943 return err; 1944 } 1945 #endif 1946 #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) 1947 1948 static void setup_frame(int sig, struct target_sigaction *ka, 1949 target_sigset_t *set, CPUSPARCState *env) 1950 { 1951 abi_ulong sf_addr; 1952 struct target_signal_frame *sf; 1953 int sigframe_size, err, i; 1954 1955 /* 1. Make sure everything is clean */ 1956 //synchronize_user_stack(); 1957 1958 sigframe_size = NF_ALIGNEDSZ; 1959 sf_addr = get_sigframe(ka, env, sigframe_size); 1960 1961 sf = lock_user(VERIFY_WRITE, sf_addr, 1962 sizeof(struct target_signal_frame), 0); 1963 if (!sf) 1964 goto sigsegv; 1965 1966 //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]); 1967 #if 0 1968 if (invalid_frame_pointer(sf, sigframe_size)) 1969 goto sigill_and_return; 1970 #endif 1971 /* 2. Save the current process state */ 1972 err = setup___siginfo(&sf->info, env, set->sig[0]); 1973 err |= __put_user(0, &sf->extra_size); 1974 1975 //err |= save_fpu_state(regs, &sf->fpu_state); 1976 //err |= __put_user(&sf->fpu_state, &sf->fpu_save); 1977 1978 err |= __put_user(set->sig[0], &sf->info.si_mask); 1979 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { 1980 err |= __put_user(set->sig[i + 1], &sf->extramask[i]); 1981 } 1982 1983 for (i = 0; i < 8; i++) { 1984 err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); 1985 } 1986 for (i = 0; i < 8; i++) { 1987 err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); 1988 } 1989 if (err) 1990 goto sigsegv; 1991 1992 /* 3. signal handler back-trampoline and parameters */ 1993 env->regwptr[UREG_FP] = sf_addr; 1994 env->regwptr[UREG_I0] = sig; 1995 env->regwptr[UREG_I1] = sf_addr + 1996 offsetof(struct target_signal_frame, info); 1997 env->regwptr[UREG_I2] = sf_addr + 1998 offsetof(struct target_signal_frame, info); 1999 2000 /* 4. signal handler */ 2001 env->pc = ka->_sa_handler; 2002 env->npc = (env->pc + 4); 2003 /* 5. return to kernel instructions */ 2004 if (ka->sa_restorer) 2005 env->regwptr[UREG_I7] = ka->sa_restorer; 2006 else { 2007 uint32_t val32; 2008 2009 env->regwptr[UREG_I7] = sf_addr + 2010 offsetof(struct target_signal_frame, insns) - 2 * 4; 2011 2012 /* mov __NR_sigreturn, %g1 */ 2013 val32 = 0x821020d8; 2014 err |= __put_user(val32, &sf->insns[0]); 2015 2016 /* t 0x10 */ 2017 val32 = 0x91d02010; 2018 err |= __put_user(val32, &sf->insns[1]); 2019 if (err) 2020 goto sigsegv; 2021 2022 /* Flush instruction space. */ 2023 //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0])); 2024 // tb_flush(env); 2025 } 2026 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); 2027 return; 2028 #if 0 2029 sigill_and_return: 2030 force_sig(TARGET_SIGILL); 2031 #endif 2032 sigsegv: 2033 //fprintf(stderr, "force_sig\n"); 2034 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); 2035 force_sig(TARGET_SIGSEGV); 2036 } 2037 static inline int 2038 restore_fpu_state(CPUSPARCState *env, qemu_siginfo_fpu_t *fpu) 2039 { 2040 int err; 2041 #if 0 2042 #ifdef CONFIG_SMP 2043 if (current->flags & PF_USEDFPU) 2044 regs->psr &= ~PSR_EF; 2045 #else 2046 if (current == last_task_used_math) { 2047 last_task_used_math = 0; 2048 regs->psr &= ~PSR_EF; 2049 } 2050 #endif 2051 current->used_math = 1; 2052 current->flags &= ~PF_USEDFPU; 2053 #endif 2054 #if 0 2055 if (verify_area (VERIFY_READ, fpu, sizeof(*fpu))) 2056 return -EFAULT; 2057 #endif 2058 2059 #if 0 2060 /* XXX: incorrect */ 2061 err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0], 2062 (sizeof(unsigned long) * 32)); 2063 #endif 2064 err |= __get_user(env->fsr, &fpu->si_fsr); 2065 #if 0 2066 err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth); 2067 if (current->thread.fpqdepth != 0) 2068 err |= __copy_from_user(¤t->thread.fpqueue[0], 2069 &fpu->si_fpqueue[0], 2070 ((sizeof(unsigned long) + 2071 (sizeof(unsigned long *)))*16)); 2072 #endif 2073 return err; 2074 } 2075 2076 2077 static void setup_rt_frame(int sig, struct target_sigaction *ka, 2078 target_siginfo_t *info, 2079 target_sigset_t *set, CPUSPARCState *env) 2080 { 2081 fprintf(stderr, "setup_rt_frame: not implemented\n"); 2082 } 2083 2084 long do_sigreturn(CPUSPARCState *env) 2085 { 2086 abi_ulong sf_addr; 2087 struct target_signal_frame *sf; 2088 uint32_t up_psr, pc, npc; 2089 target_sigset_t set; 2090 sigset_t host_set; 2091 int err, i; 2092 2093 sf_addr = env->regwptr[UREG_FP]; 2094 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) 2095 goto segv_and_exit; 2096 #if 0 2097 fprintf(stderr, "sigreturn\n"); 2098 fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]); 2099 #endif 2100 //cpu_dump_state(env, stderr, fprintf, 0); 2101 2102 /* 1. Make sure we are not getting garbage from the user */ 2103 2104 if (sf_addr & 3) 2105 goto segv_and_exit; 2106 2107 err = __get_user(pc, &sf->info.si_regs.pc); 2108 err |= __get_user(npc, &sf->info.si_regs.npc); 2109 2110 if ((pc | npc) & 3) 2111 goto segv_and_exit; 2112 2113 /* 2. Restore the state */ 2114 err |= __get_user(up_psr, &sf->info.si_regs.psr); 2115 2116 /* User can only change condition codes and FPU enabling in %psr. */ 2117 env->psr = (up_psr & (PSR_ICC /* | PSR_EF */)) 2118 | (env->psr & ~(PSR_ICC /* | PSR_EF */)); 2119 2120 env->pc = pc; 2121 env->npc = npc; 2122 err |= __get_user(env->y, &sf->info.si_regs.y); 2123 for (i=0; i < 8; i++) { 2124 err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); 2125 } 2126 for (i=0; i < 8; i++) { 2127 err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]); 2128 } 2129 2130 /* FIXME: implement FPU save/restore: 2131 * __get_user(fpu_save, &sf->fpu_save); 2132 * if (fpu_save) 2133 * err |= restore_fpu_state(env, fpu_save); 2134 */ 2135 2136 /* This is pretty much atomic, no amount locking would prevent 2137 * the races which exist anyways. 2138 */ 2139 err |= __get_user(set.sig[0], &sf->info.si_mask); 2140 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 2141 err |= (__get_user(set.sig[i], &sf->extramask[i - 1])); 2142 } 2143 2144 target_to_host_sigset_internal(&host_set, &set); 2145 sigprocmask(SIG_SETMASK, &host_set, NULL); 2146 2147 if (err) 2148 goto segv_and_exit; 2149 unlock_user_struct(sf, sf_addr, 0); 2150 return env->regwptr[0]; 2151 2152 segv_and_exit: 2153 unlock_user_struct(sf, sf_addr, 0); 2154 force_sig(TARGET_SIGSEGV); 2155 } 2156 2157 long do_rt_sigreturn(CPUSPARCState *env) 2158 { 2159 fprintf(stderr, "do_rt_sigreturn: not implemented\n"); 2160 return -TARGET_ENOSYS; 2161 } 2162 2163 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 2164 #define MC_TSTATE 0 2165 #define MC_PC 1 2166 #define MC_NPC 2 2167 #define MC_Y 3 2168 #define MC_G1 4 2169 #define MC_G2 5 2170 #define MC_G3 6 2171 #define MC_G4 7 2172 #define MC_G5 8 2173 #define MC_G6 9 2174 #define MC_G7 10 2175 #define MC_O0 11 2176 #define MC_O1 12 2177 #define MC_O2 13 2178 #define MC_O3 14 2179 #define MC_O4 15 2180 #define MC_O5 16 2181 #define MC_O6 17 2182 #define MC_O7 18 2183 #define MC_NGREG 19 2184 2185 typedef abi_ulong target_mc_greg_t; 2186 typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG]; 2187 2188 struct target_mc_fq { 2189 abi_ulong *mcfq_addr; 2190 uint32_t mcfq_insn; 2191 }; 2192 2193 struct target_mc_fpu { 2194 union { 2195 uint32_t sregs[32]; 2196 uint64_t dregs[32]; 2197 //uint128_t qregs[16]; 2198 } mcfpu_fregs; 2199 abi_ulong mcfpu_fsr; 2200 abi_ulong mcfpu_fprs; 2201 abi_ulong mcfpu_gsr; 2202 struct target_mc_fq *mcfpu_fq; 2203 unsigned char mcfpu_qcnt; 2204 unsigned char mcfpu_qentsz; 2205 unsigned char mcfpu_enab; 2206 }; 2207 typedef struct target_mc_fpu target_mc_fpu_t; 2208 2209 typedef struct { 2210 target_mc_gregset_t mc_gregs; 2211 target_mc_greg_t mc_fp; 2212 target_mc_greg_t mc_i7; 2213 target_mc_fpu_t mc_fpregs; 2214 } target_mcontext_t; 2215 2216 struct target_ucontext { 2217 struct target_ucontext *tuc_link; 2218 abi_ulong tuc_flags; 2219 target_sigset_t tuc_sigmask; 2220 target_mcontext_t tuc_mcontext; 2221 }; 2222 2223 /* A V9 register window */ 2224 struct target_reg_window { 2225 abi_ulong locals[8]; 2226 abi_ulong ins[8]; 2227 }; 2228 2229 #define TARGET_STACK_BIAS 2047 2230 2231 /* {set, get}context() needed for 64-bit SparcLinux userland. */ 2232 void sparc64_set_context(CPUSPARCState *env) 2233 { 2234 abi_ulong ucp_addr; 2235 struct target_ucontext *ucp; 2236 target_mc_gregset_t *grp; 2237 abi_ulong pc, npc, tstate; 2238 abi_ulong fp, i7, w_addr; 2239 int err; 2240 unsigned int i; 2241 2242 ucp_addr = env->regwptr[UREG_I0]; 2243 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) 2244 goto do_sigsegv; 2245 grp = &ucp->tuc_mcontext.mc_gregs; 2246 err = __get_user(pc, &((*grp)[MC_PC])); 2247 err |= __get_user(npc, &((*grp)[MC_NPC])); 2248 if (err || ((pc | npc) & 3)) 2249 goto do_sigsegv; 2250 if (env->regwptr[UREG_I1]) { 2251 target_sigset_t target_set; 2252 sigset_t set; 2253 2254 if (TARGET_NSIG_WORDS == 1) { 2255 if (__get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0])) 2256 goto do_sigsegv; 2257 } else { 2258 abi_ulong *src, *dst; 2259 src = ucp->tuc_sigmask.sig; 2260 dst = target_set.sig; 2261 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); 2262 i++, dst++, src++) 2263 err |= __get_user(*dst, src); 2264 if (err) 2265 goto do_sigsegv; 2266 } 2267 target_to_host_sigset_internal(&set, &target_set); 2268 sigprocmask(SIG_SETMASK, &set, NULL); 2269 } 2270 env->pc = pc; 2271 env->npc = npc; 2272 err |= __get_user(env->y, &((*grp)[MC_Y])); 2273 err |= __get_user(tstate, &((*grp)[MC_TSTATE])); 2274 env->asi = (tstate >> 24) & 0xff; 2275 cpu_put_ccr(env, tstate >> 32); 2276 cpu_put_cwp64(env, tstate & 0x1f); 2277 err |= __get_user(env->gregs[1], (&(*grp)[MC_G1])); 2278 err |= __get_user(env->gregs[2], (&(*grp)[MC_G2])); 2279 err |= __get_user(env->gregs[3], (&(*grp)[MC_G3])); 2280 err |= __get_user(env->gregs[4], (&(*grp)[MC_G4])); 2281 err |= __get_user(env->gregs[5], (&(*grp)[MC_G5])); 2282 err |= __get_user(env->gregs[6], (&(*grp)[MC_G6])); 2283 err |= __get_user(env->gregs[7], (&(*grp)[MC_G7])); 2284 err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0])); 2285 err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1])); 2286 err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2])); 2287 err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3])); 2288 err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4])); 2289 err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5])); 2290 err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6])); 2291 err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7])); 2292 2293 err |= __get_user(fp, &(ucp->tuc_mcontext.mc_fp)); 2294 err |= __get_user(i7, &(ucp->tuc_mcontext.mc_i7)); 2295 2296 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; 2297 if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), 2298 abi_ulong) != 0) 2299 goto do_sigsegv; 2300 if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), 2301 abi_ulong) != 0) 2302 goto do_sigsegv; 2303 /* FIXME this does not match how the kernel handles the FPU in 2304 * its sparc64_set_context implementation. In particular the FPU 2305 * is only restored if fenab is non-zero in: 2306 * __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab)); 2307 */ 2308 err |= __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs)); 2309 { 2310 uint32_t *src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs; 2311 for (i = 0; i < 64; i++, src++) { 2312 if (i & 1) { 2313 err |= __get_user(env->fpr[i/2].l.lower, src); 2314 } else { 2315 err |= __get_user(env->fpr[i/2].l.upper, src); 2316 } 2317 } 2318 } 2319 err |= __get_user(env->fsr, 2320 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr)); 2321 err |= __get_user(env->gsr, 2322 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr)); 2323 if (err) 2324 goto do_sigsegv; 2325 unlock_user_struct(ucp, ucp_addr, 0); 2326 return; 2327 do_sigsegv: 2328 unlock_user_struct(ucp, ucp_addr, 0); 2329 force_sig(TARGET_SIGSEGV); 2330 } 2331 2332 void sparc64_get_context(CPUSPARCState *env) 2333 { 2334 abi_ulong ucp_addr; 2335 struct target_ucontext *ucp; 2336 target_mc_gregset_t *grp; 2337 target_mcontext_t *mcp; 2338 abi_ulong fp, i7, w_addr; 2339 int err; 2340 unsigned int i; 2341 target_sigset_t target_set; 2342 sigset_t set; 2343 2344 ucp_addr = env->regwptr[UREG_I0]; 2345 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) 2346 goto do_sigsegv; 2347 2348 mcp = &ucp->tuc_mcontext; 2349 grp = &mcp->mc_gregs; 2350 2351 /* Skip over the trap instruction, first. */ 2352 env->pc = env->npc; 2353 env->npc += 4; 2354 2355 err = 0; 2356 2357 sigprocmask(0, NULL, &set); 2358 host_to_target_sigset_internal(&target_set, &set); 2359 if (TARGET_NSIG_WORDS == 1) { 2360 err |= __put_user(target_set.sig[0], 2361 (abi_ulong *)&ucp->tuc_sigmask); 2362 } else { 2363 abi_ulong *src, *dst; 2364 src = target_set.sig; 2365 dst = ucp->tuc_sigmask.sig; 2366 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); 2367 i++, dst++, src++) 2368 err |= __put_user(*src, dst); 2369 if (err) 2370 goto do_sigsegv; 2371 } 2372 2373 /* XXX: tstate must be saved properly */ 2374 // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE])); 2375 err |= __put_user(env->pc, &((*grp)[MC_PC])); 2376 err |= __put_user(env->npc, &((*grp)[MC_NPC])); 2377 err |= __put_user(env->y, &((*grp)[MC_Y])); 2378 err |= __put_user(env->gregs[1], &((*grp)[MC_G1])); 2379 err |= __put_user(env->gregs[2], &((*grp)[MC_G2])); 2380 err |= __put_user(env->gregs[3], &((*grp)[MC_G3])); 2381 err |= __put_user(env->gregs[4], &((*grp)[MC_G4])); 2382 err |= __put_user(env->gregs[5], &((*grp)[MC_G5])); 2383 err |= __put_user(env->gregs[6], &((*grp)[MC_G6])); 2384 err |= __put_user(env->gregs[7], &((*grp)[MC_G7])); 2385 err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0])); 2386 err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1])); 2387 err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2])); 2388 err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3])); 2389 err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4])); 2390 err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5])); 2391 err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6])); 2392 err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7])); 2393 2394 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; 2395 fp = i7 = 0; 2396 if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), 2397 abi_ulong) != 0) 2398 goto do_sigsegv; 2399 if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), 2400 abi_ulong) != 0) 2401 goto do_sigsegv; 2402 err |= __put_user(fp, &(mcp->mc_fp)); 2403 err |= __put_user(i7, &(mcp->mc_i7)); 2404 2405 { 2406 uint32_t *dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs; 2407 for (i = 0; i < 64; i++, dst++) { 2408 if (i & 1) { 2409 err |= __put_user(env->fpr[i/2].l.lower, dst); 2410 } else { 2411 err |= __put_user(env->fpr[i/2].l.upper, dst); 2412 } 2413 } 2414 } 2415 err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr)); 2416 err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr)); 2417 err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs)); 2418 2419 if (err) 2420 goto do_sigsegv; 2421 unlock_user_struct(ucp, ucp_addr, 1); 2422 return; 2423 do_sigsegv: 2424 unlock_user_struct(ucp, ucp_addr, 1); 2425 force_sig(TARGET_SIGSEGV); 2426 } 2427 #endif 2428 #elif defined(TARGET_ABI_MIPSN64) 2429 2430 # warning signal handling not implemented 2431 2432 static void setup_frame(int sig, struct target_sigaction *ka, 2433 target_sigset_t *set, CPUMIPSState *env) 2434 { 2435 fprintf(stderr, "setup_frame: not implemented\n"); 2436 } 2437 2438 static void setup_rt_frame(int sig, struct target_sigaction *ka, 2439 target_siginfo_t *info, 2440 target_sigset_t *set, CPUMIPSState *env) 2441 { 2442 fprintf(stderr, "setup_rt_frame: not implemented\n"); 2443 } 2444 2445 long do_sigreturn(CPUMIPSState *env) 2446 { 2447 fprintf(stderr, "do_sigreturn: not implemented\n"); 2448 return -TARGET_ENOSYS; 2449 } 2450 2451 long do_rt_sigreturn(CPUMIPSState *env) 2452 { 2453 fprintf(stderr, "do_rt_sigreturn: not implemented\n"); 2454 return -TARGET_ENOSYS; 2455 } 2456 2457 #elif defined(TARGET_ABI_MIPSN32) 2458 2459 # warning signal handling not implemented 2460 2461 static void setup_frame(int sig, struct target_sigaction *ka, 2462 target_sigset_t *set, CPUMIPSState *env) 2463 { 2464 fprintf(stderr, "setup_frame: not implemented\n"); 2465 } 2466 2467 static void setup_rt_frame(int sig, struct target_sigaction *ka, 2468 target_siginfo_t *info, 2469 target_sigset_t *set, CPUMIPSState *env) 2470 { 2471 fprintf(stderr, "setup_rt_frame: not implemented\n"); 2472 } 2473 2474 long do_sigreturn(CPUMIPSState *env) 2475 { 2476 fprintf(stderr, "do_sigreturn: not implemented\n"); 2477 return -TARGET_ENOSYS; 2478 } 2479 2480 long do_rt_sigreturn(CPUMIPSState *env) 2481 { 2482 fprintf(stderr, "do_rt_sigreturn: not implemented\n"); 2483 return -TARGET_ENOSYS; 2484 } 2485 2486 #elif defined(TARGET_ABI_MIPSO32) 2487 2488 struct target_sigcontext { 2489 uint32_t sc_regmask; /* Unused */ 2490 uint32_t sc_status; 2491 uint64_t sc_pc; 2492 uint64_t sc_regs[32]; 2493 uint64_t sc_fpregs[32]; 2494 uint32_t sc_ownedfp; /* Unused */ 2495 uint32_t sc_fpc_csr; 2496 uint32_t sc_fpc_eir; /* Unused */ 2497 uint32_t sc_used_math; 2498 uint32_t sc_dsp; /* dsp status, was sc_ssflags */ 2499 uint32_t pad0; 2500 uint64_t sc_mdhi; 2501 uint64_t sc_mdlo; 2502 target_ulong sc_hi1; /* Was sc_cause */ 2503 target_ulong sc_lo1; /* Was sc_badvaddr */ 2504 target_ulong sc_hi2; /* Was sc_sigset[4] */ 2505 target_ulong sc_lo2; 2506 target_ulong sc_hi3; 2507 target_ulong sc_lo3; 2508 }; 2509 2510 struct sigframe { 2511 uint32_t sf_ass[4]; /* argument save space for o32 */ 2512 uint32_t sf_code[2]; /* signal trampoline */ 2513 struct target_sigcontext sf_sc; 2514 target_sigset_t sf_mask; 2515 }; 2516 2517 struct target_ucontext { 2518 target_ulong tuc_flags; 2519 target_ulong tuc_link; 2520 target_stack_t tuc_stack; 2521 target_ulong pad0; 2522 struct target_sigcontext tuc_mcontext; 2523 target_sigset_t tuc_sigmask; 2524 }; 2525 2526 struct target_rt_sigframe { 2527 uint32_t rs_ass[4]; /* argument save space for o32 */ 2528 uint32_t rs_code[2]; /* signal trampoline */ 2529 struct target_siginfo rs_info; 2530 struct target_ucontext rs_uc; 2531 }; 2532 2533 /* Install trampoline to jump back from signal handler */ 2534 static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall) 2535 { 2536 int err; 2537 2538 /* 2539 * Set up the return code ... 2540 * 2541 * li v0, __NR__foo_sigreturn 2542 * syscall 2543 */ 2544 2545 err = __put_user(0x24020000 + syscall, tramp + 0); 2546 err |= __put_user(0x0000000c , tramp + 1); 2547 /* flush_cache_sigtramp((unsigned long) tramp); */ 2548 return err; 2549 } 2550 2551 static inline int 2552 setup_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc) 2553 { 2554 int err = 0; 2555 2556 err |= __put_user(regs->active_tc.PC, &sc->sc_pc); 2557 2558 #define save_gp_reg(i) do { \ 2559 err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ 2560 } while(0) 2561 __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2); 2562 save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6); 2563 save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10); 2564 save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14); 2565 save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18); 2566 save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22); 2567 save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26); 2568 save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30); 2569 save_gp_reg(31); 2570 #undef save_gp_reg 2571 2572 err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi); 2573 err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo); 2574 2575 /* Not used yet, but might be useful if we ever have DSP suppport */ 2576 #if 0 2577 if (cpu_has_dsp) { 2578 err |= __put_user(mfhi1(), &sc->sc_hi1); 2579 err |= __put_user(mflo1(), &sc->sc_lo1); 2580 err |= __put_user(mfhi2(), &sc->sc_hi2); 2581 err |= __put_user(mflo2(), &sc->sc_lo2); 2582 err |= __put_user(mfhi3(), &sc->sc_hi3); 2583 err |= __put_user(mflo3(), &sc->sc_lo3); 2584 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); 2585 } 2586 /* same with 64 bit */ 2587 #ifdef CONFIG_64BIT 2588 err |= __put_user(regs->hi, &sc->sc_hi[0]); 2589 err |= __put_user(regs->lo, &sc->sc_lo[0]); 2590 if (cpu_has_dsp) { 2591 err |= __put_user(mfhi1(), &sc->sc_hi[1]); 2592 err |= __put_user(mflo1(), &sc->sc_lo[1]); 2593 err |= __put_user(mfhi2(), &sc->sc_hi[2]); 2594 err |= __put_user(mflo2(), &sc->sc_lo[2]); 2595 err |= __put_user(mfhi3(), &sc->sc_hi[3]); 2596 err |= __put_user(mflo3(), &sc->sc_lo[3]); 2597 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); 2598 } 2599 #endif 2600 #endif 2601 2602 #if 0 2603 err |= __put_user(!!used_math(), &sc->sc_used_math); 2604 2605 if (!used_math()) 2606 goto out; 2607 2608 /* 2609 * Save FPU state to signal context. Signal handler will "inherit" 2610 * current FPU state. 2611 */ 2612 preempt_disable(); 2613 2614 if (!is_fpu_owner()) { 2615 own_fpu(); 2616 restore_fp(current); 2617 } 2618 err |= save_fp_context(sc); 2619 2620 preempt_enable(); 2621 out: 2622 #endif 2623 return err; 2624 } 2625 2626 static inline int 2627 restore_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc) 2628 { 2629 int err = 0; 2630 2631 err |= __get_user(regs->CP0_EPC, &sc->sc_pc); 2632 2633 err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi); 2634 err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo); 2635 2636 #define restore_gp_reg(i) do { \ 2637 err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ 2638 } while(0) 2639 restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3); 2640 restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6); 2641 restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9); 2642 restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12); 2643 restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15); 2644 restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18); 2645 restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21); 2646 restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24); 2647 restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27); 2648 restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30); 2649 restore_gp_reg(31); 2650 #undef restore_gp_reg 2651 2652 #if 0 2653 if (cpu_has_dsp) { 2654 err |= __get_user(treg, &sc->sc_hi1); mthi1(treg); 2655 err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg); 2656 err |= __get_user(treg, &sc->sc_hi2); mthi2(treg); 2657 err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg); 2658 err |= __get_user(treg, &sc->sc_hi3); mthi3(treg); 2659 err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg); 2660 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); 2661 } 2662 #ifdef CONFIG_64BIT 2663 err |= __get_user(regs->hi, &sc->sc_hi[0]); 2664 err |= __get_user(regs->lo, &sc->sc_lo[0]); 2665 if (cpu_has_dsp) { 2666 err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg); 2667 err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg); 2668 err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg); 2669 err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg); 2670 err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg); 2671 err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg); 2672 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); 2673 } 2674 #endif 2675 2676 err |= __get_user(used_math, &sc->sc_used_math); 2677 conditional_used_math(used_math); 2678 2679 preempt_disable(); 2680 2681 if (used_math()) { 2682 /* restore fpu context if we have used it before */ 2683 own_fpu(); 2684 err |= restore_fp_context(sc); 2685 } else { 2686 /* signal handler may have used FPU. Give it up. */ 2687 lose_fpu(); 2688 } 2689 2690 preempt_enable(); 2691 #endif 2692 return err; 2693 } 2694 /* 2695 * Determine which stack to use.. 2696 */ 2697 static inline abi_ulong 2698 get_sigframe(struct target_sigaction *ka, CPUMIPSState *regs, size_t frame_size) 2699 { 2700 unsigned long sp; 2701 2702 /* Default to using normal stack */ 2703 sp = regs->active_tc.gpr[29]; 2704 2705 /* 2706 * FPU emulator may have its own trampoline active just 2707 * above the user stack, 16-bytes before the next lowest 2708 * 16 byte boundary. Try to avoid trashing it. 2709 */ 2710 sp -= 32; 2711 2712 /* This is the X/Open sanctioned signal stack switching. */ 2713 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { 2714 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 2715 } 2716 2717 return (sp - frame_size) & ~7; 2718 } 2719 2720 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */ 2721 static void setup_frame(int sig, struct target_sigaction * ka, 2722 target_sigset_t *set, CPUMIPSState *regs) 2723 { 2724 struct sigframe *frame; 2725 abi_ulong frame_addr; 2726 int i; 2727 2728 frame_addr = get_sigframe(ka, regs, sizeof(*frame)); 2729 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 2730 goto give_sigsegv; 2731 2732 install_sigtramp(frame->sf_code, TARGET_NR_sigreturn); 2733 2734 if(setup_sigcontext(regs, &frame->sf_sc)) 2735 goto give_sigsegv; 2736 2737 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 2738 if(__put_user(set->sig[i], &frame->sf_mask.sig[i])) 2739 goto give_sigsegv; 2740 } 2741 2742 /* 2743 * Arguments to signal handler: 2744 * 2745 * a0 = signal number 2746 * a1 = 0 (should be cause) 2747 * a2 = pointer to struct sigcontext 2748 * 2749 * $25 and PC point to the signal handler, $29 points to the 2750 * struct sigframe. 2751 */ 2752 regs->active_tc.gpr[ 4] = sig; 2753 regs->active_tc.gpr[ 5] = 0; 2754 regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc); 2755 regs->active_tc.gpr[29] = frame_addr; 2756 regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code); 2757 /* The original kernel code sets CP0_EPC to the handler 2758 * since it returns to userland using eret 2759 * we cannot do this here, and we must set PC directly */ 2760 regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler; 2761 unlock_user_struct(frame, frame_addr, 1); 2762 return; 2763 2764 give_sigsegv: 2765 unlock_user_struct(frame, frame_addr, 1); 2766 force_sig(TARGET_SIGSEGV/*, current*/); 2767 return; 2768 } 2769 2770 long do_sigreturn(CPUMIPSState *regs) 2771 { 2772 struct sigframe *frame; 2773 abi_ulong frame_addr; 2774 sigset_t blocked; 2775 target_sigset_t target_set; 2776 int i; 2777 2778 #if defined(DEBUG_SIGNAL) 2779 fprintf(stderr, "do_sigreturn\n"); 2780 #endif 2781 frame_addr = regs->active_tc.gpr[29]; 2782 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 2783 goto badframe; 2784 2785 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 2786 if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i])) 2787 goto badframe; 2788 } 2789 2790 target_to_host_sigset_internal(&blocked, &target_set); 2791 sigprocmask(SIG_SETMASK, &blocked, NULL); 2792 2793 if (restore_sigcontext(regs, &frame->sf_sc)) 2794 goto badframe; 2795 2796 #if 0 2797 /* 2798 * Don't let your children do this ... 2799 */ 2800 __asm__ __volatile__( 2801 "move\t$29, %0\n\t" 2802 "j\tsyscall_exit" 2803 :/* no outputs */ 2804 :"r" (®s)); 2805 /* Unreached */ 2806 #endif 2807 2808 regs->active_tc.PC = regs->CP0_EPC; 2809 /* I am not sure this is right, but it seems to work 2810 * maybe a problem with nested signals ? */ 2811 regs->CP0_EPC = 0; 2812 return -TARGET_QEMU_ESIGRETURN; 2813 2814 badframe: 2815 force_sig(TARGET_SIGSEGV/*, current*/); 2816 return 0; 2817 } 2818 2819 static void setup_rt_frame(int sig, struct target_sigaction *ka, 2820 target_siginfo_t *info, 2821 target_sigset_t *set, CPUMIPSState *env) 2822 { 2823 struct target_rt_sigframe *frame; 2824 abi_ulong frame_addr; 2825 int i; 2826 2827 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 2828 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 2829 goto give_sigsegv; 2830 2831 install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn); 2832 2833 copy_siginfo_to_user(&frame->rs_info, info); 2834 2835 __put_user(0, &frame->rs_uc.tuc_flags); 2836 __put_user(0, &frame->rs_uc.tuc_link); 2837 __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp); 2838 __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size); 2839 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), 2840 &frame->rs_uc.tuc_stack.ss_flags); 2841 2842 setup_sigcontext(env, &frame->rs_uc.tuc_mcontext); 2843 2844 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 2845 __put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]); 2846 } 2847 2848 /* 2849 * Arguments to signal handler: 2850 * 2851 * a0 = signal number 2852 * a1 = pointer to struct siginfo 2853 * a2 = pointer to struct ucontext 2854 * 2855 * $25 and PC point to the signal handler, $29 points to the 2856 * struct sigframe. 2857 */ 2858 env->active_tc.gpr[ 4] = sig; 2859 env->active_tc.gpr[ 5] = frame_addr 2860 + offsetof(struct target_rt_sigframe, rs_info); 2861 env->active_tc.gpr[ 6] = frame_addr 2862 + offsetof(struct target_rt_sigframe, rs_uc); 2863 env->active_tc.gpr[29] = frame_addr; 2864 env->active_tc.gpr[31] = frame_addr 2865 + offsetof(struct target_rt_sigframe, rs_code); 2866 /* The original kernel code sets CP0_EPC to the handler 2867 * since it returns to userland using eret 2868 * we cannot do this here, and we must set PC directly */ 2869 env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler; 2870 unlock_user_struct(frame, frame_addr, 1); 2871 return; 2872 2873 give_sigsegv: 2874 unlock_user_struct(frame, frame_addr, 1); 2875 force_sig(TARGET_SIGSEGV/*, current*/); 2876 return; 2877 } 2878 2879 long do_rt_sigreturn(CPUMIPSState *env) 2880 { 2881 struct target_rt_sigframe *frame; 2882 abi_ulong frame_addr; 2883 sigset_t blocked; 2884 2885 #if defined(DEBUG_SIGNAL) 2886 fprintf(stderr, "do_rt_sigreturn\n"); 2887 #endif 2888 frame_addr = env->active_tc.gpr[29]; 2889 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 2890 goto badframe; 2891 2892 target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask); 2893 sigprocmask(SIG_SETMASK, &blocked, NULL); 2894 2895 if (restore_sigcontext(env, &frame->rs_uc.tuc_mcontext)) 2896 goto badframe; 2897 2898 if (do_sigaltstack(frame_addr + 2899 offsetof(struct target_rt_sigframe, rs_uc.tuc_stack), 2900 0, get_sp_from_cpustate(env)) == -EFAULT) 2901 goto badframe; 2902 2903 env->active_tc.PC = env->CP0_EPC; 2904 /* I am not sure this is right, but it seems to work 2905 * maybe a problem with nested signals ? */ 2906 env->CP0_EPC = 0; 2907 return -TARGET_QEMU_ESIGRETURN; 2908 2909 badframe: 2910 force_sig(TARGET_SIGSEGV/*, current*/); 2911 return 0; 2912 } 2913 2914 #elif defined(TARGET_SH4) 2915 2916 /* 2917 * code and data structures from linux kernel: 2918 * include/asm-sh/sigcontext.h 2919 * arch/sh/kernel/signal.c 2920 */ 2921 2922 struct target_sigcontext { 2923 target_ulong oldmask; 2924 2925 /* CPU registers */ 2926 target_ulong sc_gregs[16]; 2927 target_ulong sc_pc; 2928 target_ulong sc_pr; 2929 target_ulong sc_sr; 2930 target_ulong sc_gbr; 2931 target_ulong sc_mach; 2932 target_ulong sc_macl; 2933 2934 /* FPU registers */ 2935 target_ulong sc_fpregs[16]; 2936 target_ulong sc_xfpregs[16]; 2937 unsigned int sc_fpscr; 2938 unsigned int sc_fpul; 2939 unsigned int sc_ownedfp; 2940 }; 2941 2942 struct target_sigframe 2943 { 2944 struct target_sigcontext sc; 2945 target_ulong extramask[TARGET_NSIG_WORDS-1]; 2946 uint16_t retcode[3]; 2947 }; 2948 2949 2950 struct target_ucontext { 2951 target_ulong tuc_flags; 2952 struct target_ucontext *tuc_link; 2953 target_stack_t tuc_stack; 2954 struct target_sigcontext tuc_mcontext; 2955 target_sigset_t tuc_sigmask; /* mask last for extensibility */ 2956 }; 2957 2958 struct target_rt_sigframe 2959 { 2960 struct target_siginfo info; 2961 struct target_ucontext uc; 2962 uint16_t retcode[3]; 2963 }; 2964 2965 2966 #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */ 2967 #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */ 2968 2969 static abi_ulong get_sigframe(struct target_sigaction *ka, 2970 unsigned long sp, size_t frame_size) 2971 { 2972 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) { 2973 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 2974 } 2975 2976 return (sp - frame_size) & -8ul; 2977 } 2978 2979 static int setup_sigcontext(struct target_sigcontext *sc, 2980 CPUSH4State *regs, unsigned long mask) 2981 { 2982 int err = 0; 2983 int i; 2984 2985 #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) 2986 COPY(gregs[0]); COPY(gregs[1]); 2987 COPY(gregs[2]); COPY(gregs[3]); 2988 COPY(gregs[4]); COPY(gregs[5]); 2989 COPY(gregs[6]); COPY(gregs[7]); 2990 COPY(gregs[8]); COPY(gregs[9]); 2991 COPY(gregs[10]); COPY(gregs[11]); 2992 COPY(gregs[12]); COPY(gregs[13]); 2993 COPY(gregs[14]); COPY(gregs[15]); 2994 COPY(gbr); COPY(mach); 2995 COPY(macl); COPY(pr); 2996 COPY(sr); COPY(pc); 2997 #undef COPY 2998 2999 for (i=0; i<16; i++) { 3000 err |= __put_user(regs->fregs[i], &sc->sc_fpregs[i]); 3001 } 3002 err |= __put_user(regs->fpscr, &sc->sc_fpscr); 3003 err |= __put_user(regs->fpul, &sc->sc_fpul); 3004 3005 /* non-iBCS2 extensions.. */ 3006 err |= __put_user(mask, &sc->oldmask); 3007 3008 return err; 3009 } 3010 3011 static int restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc, 3012 target_ulong *r0_p) 3013 { 3014 unsigned int err = 0; 3015 int i; 3016 3017 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) 3018 COPY(gregs[1]); 3019 COPY(gregs[2]); COPY(gregs[3]); 3020 COPY(gregs[4]); COPY(gregs[5]); 3021 COPY(gregs[6]); COPY(gregs[7]); 3022 COPY(gregs[8]); COPY(gregs[9]); 3023 COPY(gregs[10]); COPY(gregs[11]); 3024 COPY(gregs[12]); COPY(gregs[13]); 3025 COPY(gregs[14]); COPY(gregs[15]); 3026 COPY(gbr); COPY(mach); 3027 COPY(macl); COPY(pr); 3028 COPY(sr); COPY(pc); 3029 #undef COPY 3030 3031 for (i=0; i<16; i++) { 3032 err |= __get_user(regs->fregs[i], &sc->sc_fpregs[i]); 3033 } 3034 err |= __get_user(regs->fpscr, &sc->sc_fpscr); 3035 err |= __get_user(regs->fpul, &sc->sc_fpul); 3036 3037 regs->tra = -1; /* disable syscall checks */ 3038 err |= __get_user(*r0_p, &sc->sc_gregs[0]); 3039 return err; 3040 } 3041 3042 static void setup_frame(int sig, struct target_sigaction *ka, 3043 target_sigset_t *set, CPUSH4State *regs) 3044 { 3045 struct target_sigframe *frame; 3046 abi_ulong frame_addr; 3047 int i; 3048 int err = 0; 3049 int signal; 3050 3051 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); 3052 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 3053 goto give_sigsegv; 3054 3055 signal = current_exec_domain_sig(sig); 3056 3057 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]); 3058 3059 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { 3060 err |= __put_user(set->sig[i + 1], &frame->extramask[i]); 3061 } 3062 3063 /* Set up to return from userspace. If provided, use a stub 3064 already in userspace. */ 3065 if (ka->sa_flags & TARGET_SA_RESTORER) { 3066 regs->pr = (unsigned long) ka->sa_restorer; 3067 } else { 3068 /* Generate return code (system call to sigreturn) */ 3069 err |= __put_user(MOVW(2), &frame->retcode[0]); 3070 err |= __put_user(TRAP_NOARG, &frame->retcode[1]); 3071 err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]); 3072 regs->pr = (unsigned long) frame->retcode; 3073 } 3074 3075 if (err) 3076 goto give_sigsegv; 3077 3078 /* Set up registers for signal handler */ 3079 regs->gregs[15] = frame_addr; 3080 regs->gregs[4] = signal; /* Arg for signal handler */ 3081 regs->gregs[5] = 0; 3082 regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc); 3083 regs->pc = (unsigned long) ka->_sa_handler; 3084 3085 unlock_user_struct(frame, frame_addr, 1); 3086 return; 3087 3088 give_sigsegv: 3089 unlock_user_struct(frame, frame_addr, 1); 3090 force_sig(TARGET_SIGSEGV); 3091 } 3092 3093 static void setup_rt_frame(int sig, struct target_sigaction *ka, 3094 target_siginfo_t *info, 3095 target_sigset_t *set, CPUSH4State *regs) 3096 { 3097 struct target_rt_sigframe *frame; 3098 abi_ulong frame_addr; 3099 int i; 3100 int err = 0; 3101 int signal; 3102 3103 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); 3104 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 3105 goto give_sigsegv; 3106 3107 signal = current_exec_domain_sig(sig); 3108 3109 err |= copy_siginfo_to_user(&frame->info, info); 3110 3111 /* Create the ucontext. */ 3112 err |= __put_user(0, &frame->uc.tuc_flags); 3113 err |= __put_user(0, (unsigned long *)&frame->uc.tuc_link); 3114 err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp, 3115 &frame->uc.tuc_stack.ss_sp); 3116 err |= __put_user(sas_ss_flags(regs->gregs[15]), 3117 &frame->uc.tuc_stack.ss_flags); 3118 err |= __put_user(target_sigaltstack_used.ss_size, 3119 &frame->uc.tuc_stack.ss_size); 3120 err |= setup_sigcontext(&frame->uc.tuc_mcontext, 3121 regs, set->sig[0]); 3122 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 3123 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); 3124 } 3125 3126 /* Set up to return from userspace. If provided, use a stub 3127 already in userspace. */ 3128 if (ka->sa_flags & TARGET_SA_RESTORER) { 3129 regs->pr = (unsigned long) ka->sa_restorer; 3130 } else { 3131 /* Generate return code (system call to sigreturn) */ 3132 err |= __put_user(MOVW(2), &frame->retcode[0]); 3133 err |= __put_user(TRAP_NOARG, &frame->retcode[1]); 3134 err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]); 3135 regs->pr = (unsigned long) frame->retcode; 3136 } 3137 3138 if (err) 3139 goto give_sigsegv; 3140 3141 /* Set up registers for signal handler */ 3142 regs->gregs[15] = frame_addr; 3143 regs->gregs[4] = signal; /* Arg for signal handler */ 3144 regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info); 3145 regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc); 3146 regs->pc = (unsigned long) ka->_sa_handler; 3147 3148 unlock_user_struct(frame, frame_addr, 1); 3149 return; 3150 3151 give_sigsegv: 3152 unlock_user_struct(frame, frame_addr, 1); 3153 force_sig(TARGET_SIGSEGV); 3154 } 3155 3156 long do_sigreturn(CPUSH4State *regs) 3157 { 3158 struct target_sigframe *frame; 3159 abi_ulong frame_addr; 3160 sigset_t blocked; 3161 target_sigset_t target_set; 3162 target_ulong r0; 3163 int i; 3164 int err = 0; 3165 3166 #if defined(DEBUG_SIGNAL) 3167 fprintf(stderr, "do_sigreturn\n"); 3168 #endif 3169 frame_addr = regs->gregs[15]; 3170 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 3171 goto badframe; 3172 3173 err |= __get_user(target_set.sig[0], &frame->sc.oldmask); 3174 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3175 err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1])); 3176 } 3177 3178 if (err) 3179 goto badframe; 3180 3181 target_to_host_sigset_internal(&blocked, &target_set); 3182 sigprocmask(SIG_SETMASK, &blocked, NULL); 3183 3184 if (restore_sigcontext(regs, &frame->sc, &r0)) 3185 goto badframe; 3186 3187 unlock_user_struct(frame, frame_addr, 0); 3188 return r0; 3189 3190 badframe: 3191 unlock_user_struct(frame, frame_addr, 0); 3192 force_sig(TARGET_SIGSEGV); 3193 return 0; 3194 } 3195 3196 long do_rt_sigreturn(CPUSH4State *regs) 3197 { 3198 struct target_rt_sigframe *frame; 3199 abi_ulong frame_addr; 3200 sigset_t blocked; 3201 target_ulong r0; 3202 3203 #if defined(DEBUG_SIGNAL) 3204 fprintf(stderr, "do_rt_sigreturn\n"); 3205 #endif 3206 frame_addr = regs->gregs[15]; 3207 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 3208 goto badframe; 3209 3210 target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask); 3211 sigprocmask(SIG_SETMASK, &blocked, NULL); 3212 3213 if (restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0)) 3214 goto badframe; 3215 3216 if (do_sigaltstack(frame_addr + 3217 offsetof(struct target_rt_sigframe, uc.tuc_stack), 3218 0, get_sp_from_cpustate(regs)) == -EFAULT) 3219 goto badframe; 3220 3221 unlock_user_struct(frame, frame_addr, 0); 3222 return r0; 3223 3224 badframe: 3225 unlock_user_struct(frame, frame_addr, 0); 3226 force_sig(TARGET_SIGSEGV); 3227 return 0; 3228 } 3229 #elif defined(TARGET_MICROBLAZE) 3230 3231 struct target_sigcontext { 3232 struct target_pt_regs regs; /* needs to be first */ 3233 uint32_t oldmask; 3234 }; 3235 3236 struct target_stack_t { 3237 abi_ulong ss_sp; 3238 int ss_flags; 3239 unsigned int ss_size; 3240 }; 3241 3242 struct target_ucontext { 3243 abi_ulong tuc_flags; 3244 abi_ulong tuc_link; 3245 struct target_stack_t tuc_stack; 3246 struct target_sigcontext tuc_mcontext; 3247 uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1]; 3248 }; 3249 3250 /* Signal frames. */ 3251 struct target_signal_frame { 3252 struct target_ucontext uc; 3253 uint32_t extramask[TARGET_NSIG_WORDS - 1]; 3254 uint32_t tramp[2]; 3255 }; 3256 3257 struct rt_signal_frame { 3258 struct siginfo info; 3259 struct ucontext uc; 3260 uint32_t tramp[2]; 3261 }; 3262 3263 static void setup_sigcontext(struct target_sigcontext *sc, CPUMBState *env) 3264 { 3265 __put_user(env->regs[0], &sc->regs.r0); 3266 __put_user(env->regs[1], &sc->regs.r1); 3267 __put_user(env->regs[2], &sc->regs.r2); 3268 __put_user(env->regs[3], &sc->regs.r3); 3269 __put_user(env->regs[4], &sc->regs.r4); 3270 __put_user(env->regs[5], &sc->regs.r5); 3271 __put_user(env->regs[6], &sc->regs.r6); 3272 __put_user(env->regs[7], &sc->regs.r7); 3273 __put_user(env->regs[8], &sc->regs.r8); 3274 __put_user(env->regs[9], &sc->regs.r9); 3275 __put_user(env->regs[10], &sc->regs.r10); 3276 __put_user(env->regs[11], &sc->regs.r11); 3277 __put_user(env->regs[12], &sc->regs.r12); 3278 __put_user(env->regs[13], &sc->regs.r13); 3279 __put_user(env->regs[14], &sc->regs.r14); 3280 __put_user(env->regs[15], &sc->regs.r15); 3281 __put_user(env->regs[16], &sc->regs.r16); 3282 __put_user(env->regs[17], &sc->regs.r17); 3283 __put_user(env->regs[18], &sc->regs.r18); 3284 __put_user(env->regs[19], &sc->regs.r19); 3285 __put_user(env->regs[20], &sc->regs.r20); 3286 __put_user(env->regs[21], &sc->regs.r21); 3287 __put_user(env->regs[22], &sc->regs.r22); 3288 __put_user(env->regs[23], &sc->regs.r23); 3289 __put_user(env->regs[24], &sc->regs.r24); 3290 __put_user(env->regs[25], &sc->regs.r25); 3291 __put_user(env->regs[26], &sc->regs.r26); 3292 __put_user(env->regs[27], &sc->regs.r27); 3293 __put_user(env->regs[28], &sc->regs.r28); 3294 __put_user(env->regs[29], &sc->regs.r29); 3295 __put_user(env->regs[30], &sc->regs.r30); 3296 __put_user(env->regs[31], &sc->regs.r31); 3297 __put_user(env->sregs[SR_PC], &sc->regs.pc); 3298 } 3299 3300 static void restore_sigcontext(struct target_sigcontext *sc, CPUMBState *env) 3301 { 3302 __get_user(env->regs[0], &sc->regs.r0); 3303 __get_user(env->regs[1], &sc->regs.r1); 3304 __get_user(env->regs[2], &sc->regs.r2); 3305 __get_user(env->regs[3], &sc->regs.r3); 3306 __get_user(env->regs[4], &sc->regs.r4); 3307 __get_user(env->regs[5], &sc->regs.r5); 3308 __get_user(env->regs[6], &sc->regs.r6); 3309 __get_user(env->regs[7], &sc->regs.r7); 3310 __get_user(env->regs[8], &sc->regs.r8); 3311 __get_user(env->regs[9], &sc->regs.r9); 3312 __get_user(env->regs[10], &sc->regs.r10); 3313 __get_user(env->regs[11], &sc->regs.r11); 3314 __get_user(env->regs[12], &sc->regs.r12); 3315 __get_user(env->regs[13], &sc->regs.r13); 3316 __get_user(env->regs[14], &sc->regs.r14); 3317 __get_user(env->regs[15], &sc->regs.r15); 3318 __get_user(env->regs[16], &sc->regs.r16); 3319 __get_user(env->regs[17], &sc->regs.r17); 3320 __get_user(env->regs[18], &sc->regs.r18); 3321 __get_user(env->regs[19], &sc->regs.r19); 3322 __get_user(env->regs[20], &sc->regs.r20); 3323 __get_user(env->regs[21], &sc->regs.r21); 3324 __get_user(env->regs[22], &sc->regs.r22); 3325 __get_user(env->regs[23], &sc->regs.r23); 3326 __get_user(env->regs[24], &sc->regs.r24); 3327 __get_user(env->regs[25], &sc->regs.r25); 3328 __get_user(env->regs[26], &sc->regs.r26); 3329 __get_user(env->regs[27], &sc->regs.r27); 3330 __get_user(env->regs[28], &sc->regs.r28); 3331 __get_user(env->regs[29], &sc->regs.r29); 3332 __get_user(env->regs[30], &sc->regs.r30); 3333 __get_user(env->regs[31], &sc->regs.r31); 3334 __get_user(env->sregs[SR_PC], &sc->regs.pc); 3335 } 3336 3337 static abi_ulong get_sigframe(struct target_sigaction *ka, 3338 CPUMBState *env, int frame_size) 3339 { 3340 abi_ulong sp = env->regs[1]; 3341 3342 if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp)) 3343 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 3344 3345 return ((sp - frame_size) & -8UL); 3346 } 3347 3348 static void setup_frame(int sig, struct target_sigaction *ka, 3349 target_sigset_t *set, CPUMBState *env) 3350 { 3351 struct target_signal_frame *frame; 3352 abi_ulong frame_addr; 3353 int err = 0; 3354 int i; 3355 3356 frame_addr = get_sigframe(ka, env, sizeof *frame); 3357 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 3358 goto badframe; 3359 3360 /* Save the mask. */ 3361 err |= __put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask); 3362 if (err) 3363 goto badframe; 3364 3365 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3366 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 3367 goto badframe; 3368 } 3369 3370 setup_sigcontext(&frame->uc.tuc_mcontext, env); 3371 3372 /* Set up to return from userspace. If provided, use a stub 3373 already in userspace. */ 3374 /* minus 8 is offset to cater for "rtsd r15,8" offset */ 3375 if (ka->sa_flags & TARGET_SA_RESTORER) { 3376 env->regs[15] = ((unsigned long)ka->sa_restorer)-8; 3377 } else { 3378 uint32_t t; 3379 /* Note, these encodings are _big endian_! */ 3380 /* addi r12, r0, __NR_sigreturn */ 3381 t = 0x31800000UL | TARGET_NR_sigreturn; 3382 err |= __put_user(t, frame->tramp + 0); 3383 /* brki r14, 0x8 */ 3384 t = 0xb9cc0008UL; 3385 err |= __put_user(t, frame->tramp + 1); 3386 3387 /* Return from sighandler will jump to the tramp. 3388 Negative 8 offset because return is rtsd r15, 8 */ 3389 env->regs[15] = ((unsigned long)frame->tramp) - 8; 3390 } 3391 3392 if (err) 3393 goto badframe; 3394 3395 /* Set up registers for signal handler */ 3396 env->regs[1] = frame_addr; 3397 /* Signal handler args: */ 3398 env->regs[5] = sig; /* Arg 0: signum */ 3399 env->regs[6] = 0; 3400 /* arg 1: sigcontext */ 3401 env->regs[7] = frame_addr += offsetof(typeof(*frame), uc); 3402 3403 /* Offset of 4 to handle microblaze rtid r14, 0 */ 3404 env->sregs[SR_PC] = (unsigned long)ka->_sa_handler; 3405 3406 unlock_user_struct(frame, frame_addr, 1); 3407 return; 3408 badframe: 3409 unlock_user_struct(frame, frame_addr, 1); 3410 force_sig(TARGET_SIGSEGV); 3411 } 3412 3413 static void setup_rt_frame(int sig, struct target_sigaction *ka, 3414 target_siginfo_t *info, 3415 target_sigset_t *set, CPUMBState *env) 3416 { 3417 fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n"); 3418 } 3419 3420 long do_sigreturn(CPUMBState *env) 3421 { 3422 struct target_signal_frame *frame; 3423 abi_ulong frame_addr; 3424 target_sigset_t target_set; 3425 sigset_t set; 3426 int i; 3427 3428 frame_addr = env->regs[R_SP]; 3429 /* Make sure the guest isn't playing games. */ 3430 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) 3431 goto badframe; 3432 3433 /* Restore blocked signals */ 3434 if (__get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask)) 3435 goto badframe; 3436 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3437 if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) 3438 goto badframe; 3439 } 3440 target_to_host_sigset_internal(&set, &target_set); 3441 sigprocmask(SIG_SETMASK, &set, NULL); 3442 3443 restore_sigcontext(&frame->uc.tuc_mcontext, env); 3444 /* We got here through a sigreturn syscall, our path back is via an 3445 rtb insn so setup r14 for that. */ 3446 env->regs[14] = env->sregs[SR_PC]; 3447 3448 unlock_user_struct(frame, frame_addr, 0); 3449 return env->regs[10]; 3450 badframe: 3451 unlock_user_struct(frame, frame_addr, 0); 3452 force_sig(TARGET_SIGSEGV); 3453 } 3454 3455 long do_rt_sigreturn(CPUMBState *env) 3456 { 3457 fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n"); 3458 return -TARGET_ENOSYS; 3459 } 3460 3461 #elif defined(TARGET_CRIS) 3462 3463 struct target_sigcontext { 3464 struct target_pt_regs regs; /* needs to be first */ 3465 uint32_t oldmask; 3466 uint32_t usp; /* usp before stacking this gunk on it */ 3467 }; 3468 3469 /* Signal frames. */ 3470 struct target_signal_frame { 3471 struct target_sigcontext sc; 3472 uint32_t extramask[TARGET_NSIG_WORDS - 1]; 3473 uint8_t retcode[8]; /* Trampoline code. */ 3474 }; 3475 3476 struct rt_signal_frame { 3477 struct siginfo *pinfo; 3478 void *puc; 3479 struct siginfo info; 3480 struct ucontext uc; 3481 uint8_t retcode[8]; /* Trampoline code. */ 3482 }; 3483 3484 static void setup_sigcontext(struct target_sigcontext *sc, CPUCRISState *env) 3485 { 3486 __put_user(env->regs[0], &sc->regs.r0); 3487 __put_user(env->regs[1], &sc->regs.r1); 3488 __put_user(env->regs[2], &sc->regs.r2); 3489 __put_user(env->regs[3], &sc->regs.r3); 3490 __put_user(env->regs[4], &sc->regs.r4); 3491 __put_user(env->regs[5], &sc->regs.r5); 3492 __put_user(env->regs[6], &sc->regs.r6); 3493 __put_user(env->regs[7], &sc->regs.r7); 3494 __put_user(env->regs[8], &sc->regs.r8); 3495 __put_user(env->regs[9], &sc->regs.r9); 3496 __put_user(env->regs[10], &sc->regs.r10); 3497 __put_user(env->regs[11], &sc->regs.r11); 3498 __put_user(env->regs[12], &sc->regs.r12); 3499 __put_user(env->regs[13], &sc->regs.r13); 3500 __put_user(env->regs[14], &sc->usp); 3501 __put_user(env->regs[15], &sc->regs.acr); 3502 __put_user(env->pregs[PR_MOF], &sc->regs.mof); 3503 __put_user(env->pregs[PR_SRP], &sc->regs.srp); 3504 __put_user(env->pc, &sc->regs.erp); 3505 } 3506 3507 static void restore_sigcontext(struct target_sigcontext *sc, CPUCRISState *env) 3508 { 3509 __get_user(env->regs[0], &sc->regs.r0); 3510 __get_user(env->regs[1], &sc->regs.r1); 3511 __get_user(env->regs[2], &sc->regs.r2); 3512 __get_user(env->regs[3], &sc->regs.r3); 3513 __get_user(env->regs[4], &sc->regs.r4); 3514 __get_user(env->regs[5], &sc->regs.r5); 3515 __get_user(env->regs[6], &sc->regs.r6); 3516 __get_user(env->regs[7], &sc->regs.r7); 3517 __get_user(env->regs[8], &sc->regs.r8); 3518 __get_user(env->regs[9], &sc->regs.r9); 3519 __get_user(env->regs[10], &sc->regs.r10); 3520 __get_user(env->regs[11], &sc->regs.r11); 3521 __get_user(env->regs[12], &sc->regs.r12); 3522 __get_user(env->regs[13], &sc->regs.r13); 3523 __get_user(env->regs[14], &sc->usp); 3524 __get_user(env->regs[15], &sc->regs.acr); 3525 __get_user(env->pregs[PR_MOF], &sc->regs.mof); 3526 __get_user(env->pregs[PR_SRP], &sc->regs.srp); 3527 __get_user(env->pc, &sc->regs.erp); 3528 } 3529 3530 static abi_ulong get_sigframe(CPUCRISState *env, int framesize) 3531 { 3532 abi_ulong sp; 3533 /* Align the stack downwards to 4. */ 3534 sp = (env->regs[R_SP] & ~3); 3535 return sp - framesize; 3536 } 3537 3538 static void setup_frame(int sig, struct target_sigaction *ka, 3539 target_sigset_t *set, CPUCRISState *env) 3540 { 3541 struct target_signal_frame *frame; 3542 abi_ulong frame_addr; 3543 int err = 0; 3544 int i; 3545 3546 frame_addr = get_sigframe(env, sizeof *frame); 3547 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 3548 goto badframe; 3549 3550 /* 3551 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't 3552 * use this trampoline anymore but it sets it up for GDB. 3553 * In QEMU, using the trampoline simplifies things a bit so we use it. 3554 * 3555 * This is movu.w __NR_sigreturn, r9; break 13; 3556 */ 3557 err |= __put_user(0x9c5f, frame->retcode+0); 3558 err |= __put_user(TARGET_NR_sigreturn, 3559 frame->retcode+2); 3560 err |= __put_user(0xe93d, frame->retcode+4); 3561 3562 /* Save the mask. */ 3563 err |= __put_user(set->sig[0], &frame->sc.oldmask); 3564 if (err) 3565 goto badframe; 3566 3567 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3568 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 3569 goto badframe; 3570 } 3571 3572 setup_sigcontext(&frame->sc, env); 3573 3574 /* Move the stack and setup the arguments for the handler. */ 3575 env->regs[R_SP] = frame_addr; 3576 env->regs[10] = sig; 3577 env->pc = (unsigned long) ka->_sa_handler; 3578 /* Link SRP so the guest returns through the trampoline. */ 3579 env->pregs[PR_SRP] = frame_addr + offsetof(typeof(*frame), retcode); 3580 3581 unlock_user_struct(frame, frame_addr, 1); 3582 return; 3583 badframe: 3584 unlock_user_struct(frame, frame_addr, 1); 3585 force_sig(TARGET_SIGSEGV); 3586 } 3587 3588 static void setup_rt_frame(int sig, struct target_sigaction *ka, 3589 target_siginfo_t *info, 3590 target_sigset_t *set, CPUCRISState *env) 3591 { 3592 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n"); 3593 } 3594 3595 long do_sigreturn(CPUCRISState *env) 3596 { 3597 struct target_signal_frame *frame; 3598 abi_ulong frame_addr; 3599 target_sigset_t target_set; 3600 sigset_t set; 3601 int i; 3602 3603 frame_addr = env->regs[R_SP]; 3604 /* Make sure the guest isn't playing games. */ 3605 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) 3606 goto badframe; 3607 3608 /* Restore blocked signals */ 3609 if (__get_user(target_set.sig[0], &frame->sc.oldmask)) 3610 goto badframe; 3611 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3612 if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) 3613 goto badframe; 3614 } 3615 target_to_host_sigset_internal(&set, &target_set); 3616 sigprocmask(SIG_SETMASK, &set, NULL); 3617 3618 restore_sigcontext(&frame->sc, env); 3619 unlock_user_struct(frame, frame_addr, 0); 3620 return env->regs[10]; 3621 badframe: 3622 unlock_user_struct(frame, frame_addr, 0); 3623 force_sig(TARGET_SIGSEGV); 3624 } 3625 3626 long do_rt_sigreturn(CPUCRISState *env) 3627 { 3628 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n"); 3629 return -TARGET_ENOSYS; 3630 } 3631 3632 #elif defined(TARGET_S390X) 3633 3634 #define __NUM_GPRS 16 3635 #define __NUM_FPRS 16 3636 #define __NUM_ACRS 16 3637 3638 #define S390_SYSCALL_SIZE 2 3639 #define __SIGNAL_FRAMESIZE 160 /* FIXME: 31-bit mode -> 96 */ 3640 3641 #define _SIGCONTEXT_NSIG 64 3642 #define _SIGCONTEXT_NSIG_BPW 64 /* FIXME: 31-bit mode -> 32 */ 3643 #define _SIGCONTEXT_NSIG_WORDS (_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW) 3644 #define _SIGMASK_COPY_SIZE (sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS) 3645 #define PSW_ADDR_AMODE 0x0000000000000000UL /* 0x80000000UL for 31-bit */ 3646 #define S390_SYSCALL_OPCODE ((uint16_t)0x0a00) 3647 3648 typedef struct { 3649 target_psw_t psw; 3650 target_ulong gprs[__NUM_GPRS]; 3651 unsigned int acrs[__NUM_ACRS]; 3652 } target_s390_regs_common; 3653 3654 typedef struct { 3655 unsigned int fpc; 3656 double fprs[__NUM_FPRS]; 3657 } target_s390_fp_regs; 3658 3659 typedef struct { 3660 target_s390_regs_common regs; 3661 target_s390_fp_regs fpregs; 3662 } target_sigregs; 3663 3664 struct target_sigcontext { 3665 target_ulong oldmask[_SIGCONTEXT_NSIG_WORDS]; 3666 target_sigregs *sregs; 3667 }; 3668 3669 typedef struct { 3670 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE]; 3671 struct target_sigcontext sc; 3672 target_sigregs sregs; 3673 int signo; 3674 uint8_t retcode[S390_SYSCALL_SIZE]; 3675 } sigframe; 3676 3677 struct target_ucontext { 3678 target_ulong tuc_flags; 3679 struct target_ucontext *tuc_link; 3680 target_stack_t tuc_stack; 3681 target_sigregs tuc_mcontext; 3682 target_sigset_t tuc_sigmask; /* mask last for extensibility */ 3683 }; 3684 3685 typedef struct { 3686 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE]; 3687 uint8_t retcode[S390_SYSCALL_SIZE]; 3688 struct target_siginfo info; 3689 struct target_ucontext uc; 3690 } rt_sigframe; 3691 3692 static inline abi_ulong 3693 get_sigframe(struct target_sigaction *ka, CPUS390XState *env, size_t frame_size) 3694 { 3695 abi_ulong sp; 3696 3697 /* Default to using normal stack */ 3698 sp = env->regs[15]; 3699 3700 /* This is the X/Open sanctioned signal stack switching. */ 3701 if (ka->sa_flags & TARGET_SA_ONSTACK) { 3702 if (!sas_ss_flags(sp)) { 3703 sp = target_sigaltstack_used.ss_sp + 3704 target_sigaltstack_used.ss_size; 3705 } 3706 } 3707 3708 /* This is the legacy signal stack switching. */ 3709 else if (/* FIXME !user_mode(regs) */ 0 && 3710 !(ka->sa_flags & TARGET_SA_RESTORER) && 3711 ka->sa_restorer) { 3712 sp = (abi_ulong) ka->sa_restorer; 3713 } 3714 3715 return (sp - frame_size) & -8ul; 3716 } 3717 3718 static void save_sigregs(CPUS390XState *env, target_sigregs *sregs) 3719 { 3720 int i; 3721 //save_access_regs(current->thread.acrs); FIXME 3722 3723 /* Copy a 'clean' PSW mask to the user to avoid leaking 3724 information about whether PER is currently on. */ 3725 __put_user(env->psw.mask, &sregs->regs.psw.mask); 3726 __put_user(env->psw.addr, &sregs->regs.psw.addr); 3727 for (i = 0; i < 16; i++) { 3728 __put_user(env->regs[i], &sregs->regs.gprs[i]); 3729 } 3730 for (i = 0; i < 16; i++) { 3731 __put_user(env->aregs[i], &sregs->regs.acrs[i]); 3732 } 3733 /* 3734 * We have to store the fp registers to current->thread.fp_regs 3735 * to merge them with the emulated registers. 3736 */ 3737 //save_fp_regs(¤t->thread.fp_regs); FIXME 3738 for (i = 0; i < 16; i++) { 3739 __put_user(env->fregs[i].ll, &sregs->fpregs.fprs[i]); 3740 } 3741 } 3742 3743 static void setup_frame(int sig, struct target_sigaction *ka, 3744 target_sigset_t *set, CPUS390XState *env) 3745 { 3746 sigframe *frame; 3747 abi_ulong frame_addr; 3748 3749 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 3750 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, 3751 (unsigned long long)frame_addr); 3752 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { 3753 goto give_sigsegv; 3754 } 3755 3756 qemu_log("%s: 1\n", __FUNCTION__); 3757 if (__put_user(set->sig[0], &frame->sc.oldmask[0])) { 3758 goto give_sigsegv; 3759 } 3760 3761 save_sigregs(env, &frame->sregs); 3762 3763 __put_user((abi_ulong)(unsigned long)&frame->sregs, 3764 (abi_ulong *)&frame->sc.sregs); 3765 3766 /* Set up to return from userspace. If provided, use a stub 3767 already in userspace. */ 3768 if (ka->sa_flags & TARGET_SA_RESTORER) { 3769 env->regs[14] = (unsigned long) 3770 ka->sa_restorer | PSW_ADDR_AMODE; 3771 } else { 3772 env->regs[14] = (unsigned long) 3773 frame->retcode | PSW_ADDR_AMODE; 3774 if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn, 3775 (uint16_t *)(frame->retcode))) 3776 goto give_sigsegv; 3777 } 3778 3779 /* Set up backchain. */ 3780 if (__put_user(env->regs[15], (abi_ulong *) frame)) { 3781 goto give_sigsegv; 3782 } 3783 3784 /* Set up registers for signal handler */ 3785 env->regs[15] = frame_addr; 3786 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE; 3787 3788 env->regs[2] = sig; //map_signal(sig); 3789 env->regs[3] = frame_addr += offsetof(typeof(*frame), sc); 3790 3791 /* We forgot to include these in the sigcontext. 3792 To avoid breaking binary compatibility, they are passed as args. */ 3793 env->regs[4] = 0; // FIXME: no clue... current->thread.trap_no; 3794 env->regs[5] = 0; // FIXME: no clue... current->thread.prot_addr; 3795 3796 /* Place signal number on stack to allow backtrace from handler. */ 3797 if (__put_user(env->regs[2], (int *) &frame->signo)) { 3798 goto give_sigsegv; 3799 } 3800 unlock_user_struct(frame, frame_addr, 1); 3801 return; 3802 3803 give_sigsegv: 3804 qemu_log("%s: give_sigsegv\n", __FUNCTION__); 3805 unlock_user_struct(frame, frame_addr, 1); 3806 force_sig(TARGET_SIGSEGV); 3807 } 3808 3809 static void setup_rt_frame(int sig, struct target_sigaction *ka, 3810 target_siginfo_t *info, 3811 target_sigset_t *set, CPUS390XState *env) 3812 { 3813 int i; 3814 rt_sigframe *frame; 3815 abi_ulong frame_addr; 3816 3817 frame_addr = get_sigframe(ka, env, sizeof *frame); 3818 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, 3819 (unsigned long long)frame_addr); 3820 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { 3821 goto give_sigsegv; 3822 } 3823 3824 qemu_log("%s: 1\n", __FUNCTION__); 3825 if (copy_siginfo_to_user(&frame->info, info)) { 3826 goto give_sigsegv; 3827 } 3828 3829 /* Create the ucontext. */ 3830 __put_user(0, &frame->uc.tuc_flags); 3831 __put_user((abi_ulong)0, (abi_ulong *)&frame->uc.tuc_link); 3832 __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp); 3833 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), 3834 &frame->uc.tuc_stack.ss_flags); 3835 __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size); 3836 save_sigregs(env, &frame->uc.tuc_mcontext); 3837 for (i = 0; i < TARGET_NSIG_WORDS; i++) { 3838 __put_user((abi_ulong)set->sig[i], 3839 (abi_ulong *)&frame->uc.tuc_sigmask.sig[i]); 3840 } 3841 3842 /* Set up to return from userspace. If provided, use a stub 3843 already in userspace. */ 3844 if (ka->sa_flags & TARGET_SA_RESTORER) { 3845 env->regs[14] = (unsigned long) ka->sa_restorer | PSW_ADDR_AMODE; 3846 } else { 3847 env->regs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE; 3848 if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn, 3849 (uint16_t *)(frame->retcode))) { 3850 goto give_sigsegv; 3851 } 3852 } 3853 3854 /* Set up backchain. */ 3855 if (__put_user(env->regs[15], (abi_ulong *) frame)) { 3856 goto give_sigsegv; 3857 } 3858 3859 /* Set up registers for signal handler */ 3860 env->regs[15] = frame_addr; 3861 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE; 3862 3863 env->regs[2] = sig; //map_signal(sig); 3864 env->regs[3] = frame_addr + offsetof(typeof(*frame), info); 3865 env->regs[4] = frame_addr + offsetof(typeof(*frame), uc); 3866 return; 3867 3868 give_sigsegv: 3869 qemu_log("%s: give_sigsegv\n", __FUNCTION__); 3870 unlock_user_struct(frame, frame_addr, 1); 3871 force_sig(TARGET_SIGSEGV); 3872 } 3873 3874 static int 3875 restore_sigregs(CPUS390XState *env, target_sigregs *sc) 3876 { 3877 int err = 0; 3878 int i; 3879 3880 for (i = 0; i < 16; i++) { 3881 err |= __get_user(env->regs[i], &sc->regs.gprs[i]); 3882 } 3883 3884 err |= __get_user(env->psw.mask, &sc->regs.psw.mask); 3885 qemu_log("%s: sc->regs.psw.addr 0x%llx env->psw.addr 0x%llx\n", 3886 __FUNCTION__, (unsigned long long)sc->regs.psw.addr, 3887 (unsigned long long)env->psw.addr); 3888 err |= __get_user(env->psw.addr, &sc->regs.psw.addr); 3889 /* FIXME: 31-bit -> | PSW_ADDR_AMODE */ 3890 3891 for (i = 0; i < 16; i++) { 3892 err |= __get_user(env->aregs[i], &sc->regs.acrs[i]); 3893 } 3894 for (i = 0; i < 16; i++) { 3895 err |= __get_user(env->fregs[i].ll, &sc->fpregs.fprs[i]); 3896 } 3897 3898 return err; 3899 } 3900 3901 long do_sigreturn(CPUS390XState *env) 3902 { 3903 sigframe *frame; 3904 abi_ulong frame_addr = env->regs[15]; 3905 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, 3906 (unsigned long long)frame_addr); 3907 target_sigset_t target_set; 3908 sigset_t set; 3909 3910 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { 3911 goto badframe; 3912 } 3913 if (__get_user(target_set.sig[0], &frame->sc.oldmask[0])) { 3914 goto badframe; 3915 } 3916 3917 target_to_host_sigset_internal(&set, &target_set); 3918 sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */ 3919 3920 if (restore_sigregs(env, &frame->sregs)) { 3921 goto badframe; 3922 } 3923 3924 unlock_user_struct(frame, frame_addr, 0); 3925 return env->regs[2]; 3926 3927 badframe: 3928 unlock_user_struct(frame, frame_addr, 0); 3929 force_sig(TARGET_SIGSEGV); 3930 return 0; 3931 } 3932 3933 long do_rt_sigreturn(CPUS390XState *env) 3934 { 3935 rt_sigframe *frame; 3936 abi_ulong frame_addr = env->regs[15]; 3937 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, 3938 (unsigned long long)frame_addr); 3939 sigset_t set; 3940 3941 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { 3942 goto badframe; 3943 } 3944 target_to_host_sigset(&set, &frame->uc.tuc_sigmask); 3945 3946 sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */ 3947 3948 if (restore_sigregs(env, &frame->uc.tuc_mcontext)) { 3949 goto badframe; 3950 } 3951 3952 if (do_sigaltstack(frame_addr + offsetof(rt_sigframe, uc.tuc_stack), 0, 3953 get_sp_from_cpustate(env)) == -EFAULT) { 3954 goto badframe; 3955 } 3956 unlock_user_struct(frame, frame_addr, 0); 3957 return env->regs[2]; 3958 3959 badframe: 3960 unlock_user_struct(frame, frame_addr, 0); 3961 force_sig(TARGET_SIGSEGV); 3962 return 0; 3963 } 3964 3965 #elif defined(TARGET_PPC) && !defined(TARGET_PPC64) 3966 3967 /* FIXME: Many of the structures are defined for both PPC and PPC64, but 3968 the signal handling is different enough that we haven't implemented 3969 support for PPC64 yet. Hence the restriction above. 3970 3971 There are various #if'd blocks for code for TARGET_PPC64. These 3972 blocks should go away so that we can successfully run 32-bit and 3973 64-bit binaries on a QEMU configured for PPC64. */ 3974 3975 /* Size of dummy stack frame allocated when calling signal handler. 3976 See arch/powerpc/include/asm/ptrace.h. */ 3977 #if defined(TARGET_PPC64) 3978 #define SIGNAL_FRAMESIZE 128 3979 #else 3980 #define SIGNAL_FRAMESIZE 64 3981 #endif 3982 3983 /* See arch/powerpc/include/asm/sigcontext.h. */ 3984 struct target_sigcontext { 3985 target_ulong _unused[4]; 3986 int32_t signal; 3987 #if defined(TARGET_PPC64) 3988 int32_t pad0; 3989 #endif 3990 target_ulong handler; 3991 target_ulong oldmask; 3992 target_ulong regs; /* struct pt_regs __user * */ 3993 /* TODO: PPC64 includes extra bits here. */ 3994 }; 3995 3996 /* Indices for target_mcontext.mc_gregs, below. 3997 See arch/powerpc/include/asm/ptrace.h for details. */ 3998 enum { 3999 TARGET_PT_R0 = 0, 4000 TARGET_PT_R1 = 1, 4001 TARGET_PT_R2 = 2, 4002 TARGET_PT_R3 = 3, 4003 TARGET_PT_R4 = 4, 4004 TARGET_PT_R5 = 5, 4005 TARGET_PT_R6 = 6, 4006 TARGET_PT_R7 = 7, 4007 TARGET_PT_R8 = 8, 4008 TARGET_PT_R9 = 9, 4009 TARGET_PT_R10 = 10, 4010 TARGET_PT_R11 = 11, 4011 TARGET_PT_R12 = 12, 4012 TARGET_PT_R13 = 13, 4013 TARGET_PT_R14 = 14, 4014 TARGET_PT_R15 = 15, 4015 TARGET_PT_R16 = 16, 4016 TARGET_PT_R17 = 17, 4017 TARGET_PT_R18 = 18, 4018 TARGET_PT_R19 = 19, 4019 TARGET_PT_R20 = 20, 4020 TARGET_PT_R21 = 21, 4021 TARGET_PT_R22 = 22, 4022 TARGET_PT_R23 = 23, 4023 TARGET_PT_R24 = 24, 4024 TARGET_PT_R25 = 25, 4025 TARGET_PT_R26 = 26, 4026 TARGET_PT_R27 = 27, 4027 TARGET_PT_R28 = 28, 4028 TARGET_PT_R29 = 29, 4029 TARGET_PT_R30 = 30, 4030 TARGET_PT_R31 = 31, 4031 TARGET_PT_NIP = 32, 4032 TARGET_PT_MSR = 33, 4033 TARGET_PT_ORIG_R3 = 34, 4034 TARGET_PT_CTR = 35, 4035 TARGET_PT_LNK = 36, 4036 TARGET_PT_XER = 37, 4037 TARGET_PT_CCR = 38, 4038 /* Yes, there are two registers with #39. One is 64-bit only. */ 4039 TARGET_PT_MQ = 39, 4040 TARGET_PT_SOFTE = 39, 4041 TARGET_PT_TRAP = 40, 4042 TARGET_PT_DAR = 41, 4043 TARGET_PT_DSISR = 42, 4044 TARGET_PT_RESULT = 43, 4045 TARGET_PT_REGS_COUNT = 44 4046 }; 4047 4048 /* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC; 4049 on 64-bit PPC, sigcontext and mcontext are one and the same. */ 4050 struct target_mcontext { 4051 target_ulong mc_gregs[48]; 4052 /* Includes fpscr. */ 4053 uint64_t mc_fregs[33]; 4054 target_ulong mc_pad[2]; 4055 /* We need to handle Altivec and SPE at the same time, which no 4056 kernel needs to do. Fortunately, the kernel defines this bit to 4057 be Altivec-register-large all the time, rather than trying to 4058 twiddle it based on the specific platform. */ 4059 union { 4060 /* SPE vector registers. One extra for SPEFSCR. */ 4061 uint32_t spe[33]; 4062 /* Altivec vector registers. The packing of VSCR and VRSAVE 4063 varies depending on whether we're PPC64 or not: PPC64 splits 4064 them apart; PPC32 stuffs them together. */ 4065 #if defined(TARGET_PPC64) 4066 #define QEMU_NVRREG 34 4067 #else 4068 #define QEMU_NVRREG 33 4069 #endif 4070 ppc_avr_t altivec[QEMU_NVRREG]; 4071 #undef QEMU_NVRREG 4072 } mc_vregs __attribute__((__aligned__(16))); 4073 }; 4074 4075 struct target_ucontext { 4076 target_ulong tuc_flags; 4077 target_ulong tuc_link; /* struct ucontext __user * */ 4078 struct target_sigaltstack tuc_stack; 4079 #if !defined(TARGET_PPC64) 4080 int32_t tuc_pad[7]; 4081 target_ulong tuc_regs; /* struct mcontext __user * 4082 points to uc_mcontext field */ 4083 #endif 4084 target_sigset_t tuc_sigmask; 4085 #if defined(TARGET_PPC64) 4086 target_sigset_t unused[15]; /* Allow for uc_sigmask growth */ 4087 struct target_sigcontext tuc_mcontext; 4088 #else 4089 int32_t tuc_maskext[30]; 4090 int32_t tuc_pad2[3]; 4091 struct target_mcontext tuc_mcontext; 4092 #endif 4093 }; 4094 4095 /* See arch/powerpc/kernel/signal_32.c. */ 4096 struct target_sigframe { 4097 struct target_sigcontext sctx; 4098 struct target_mcontext mctx; 4099 int32_t abigap[56]; 4100 }; 4101 4102 struct target_rt_sigframe { 4103 struct target_siginfo info; 4104 struct target_ucontext uc; 4105 int32_t abigap[56]; 4106 }; 4107 4108 /* We use the mc_pad field for the signal return trampoline. */ 4109 #define tramp mc_pad 4110 4111 /* See arch/powerpc/kernel/signal.c. */ 4112 static target_ulong get_sigframe(struct target_sigaction *ka, 4113 CPUPPCState *env, 4114 int frame_size) 4115 { 4116 target_ulong oldsp, newsp; 4117 4118 oldsp = env->gpr[1]; 4119 4120 if ((ka->sa_flags & TARGET_SA_ONSTACK) && 4121 (sas_ss_flags(oldsp) == 0)) { 4122 oldsp = (target_sigaltstack_used.ss_sp 4123 + target_sigaltstack_used.ss_size); 4124 } 4125 4126 newsp = (oldsp - frame_size) & ~0xFUL; 4127 4128 return newsp; 4129 } 4130 4131 static int save_user_regs(CPUPPCState *env, struct target_mcontext *frame, 4132 int sigret) 4133 { 4134 target_ulong msr = env->msr; 4135 int i; 4136 target_ulong ccr = 0; 4137 4138 /* In general, the kernel attempts to be intelligent about what it 4139 needs to save for Altivec/FP/SPE registers. We don't care that 4140 much, so we just go ahead and save everything. */ 4141 4142 /* Save general registers. */ 4143 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { 4144 if (__put_user(env->gpr[i], &frame->mc_gregs[i])) { 4145 return 1; 4146 } 4147 } 4148 if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]) 4149 || __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]) 4150 || __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]) 4151 || __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER])) 4152 return 1; 4153 4154 for (i = 0; i < ARRAY_SIZE(env->crf); i++) { 4155 ccr |= env->crf[i] << (32 - ((i + 1) * 4)); 4156 } 4157 if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR])) 4158 return 1; 4159 4160 /* Save Altivec registers if necessary. */ 4161 if (env->insns_flags & PPC_ALTIVEC) { 4162 for (i = 0; i < ARRAY_SIZE(env->avr); i++) { 4163 ppc_avr_t *avr = &env->avr[i]; 4164 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; 4165 4166 if (__put_user(avr->u64[0], &vreg->u64[0]) || 4167 __put_user(avr->u64[1], &vreg->u64[1])) { 4168 return 1; 4169 } 4170 } 4171 /* Set MSR_VR in the saved MSR value to indicate that 4172 frame->mc_vregs contains valid data. */ 4173 msr |= MSR_VR; 4174 if (__put_user((uint32_t)env->spr[SPR_VRSAVE], 4175 &frame->mc_vregs.altivec[32].u32[3])) 4176 return 1; 4177 } 4178 4179 /* Save floating point registers. */ 4180 if (env->insns_flags & PPC_FLOAT) { 4181 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { 4182 if (__put_user(env->fpr[i], &frame->mc_fregs[i])) { 4183 return 1; 4184 } 4185 } 4186 if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32])) 4187 return 1; 4188 } 4189 4190 /* Save SPE registers. The kernel only saves the high half. */ 4191 if (env->insns_flags & PPC_SPE) { 4192 #if defined(TARGET_PPC64) 4193 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { 4194 if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) { 4195 return 1; 4196 } 4197 } 4198 #else 4199 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { 4200 if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) { 4201 return 1; 4202 } 4203 } 4204 #endif 4205 /* Set MSR_SPE in the saved MSR value to indicate that 4206 frame->mc_vregs contains valid data. */ 4207 msr |= MSR_SPE; 4208 if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32])) 4209 return 1; 4210 } 4211 4212 /* Store MSR. */ 4213 if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR])) 4214 return 1; 4215 4216 /* Set up the sigreturn trampoline: li r0,sigret; sc. */ 4217 if (sigret) { 4218 if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) || 4219 __put_user(0x44000002UL, &frame->tramp[1])) { 4220 return 1; 4221 } 4222 } 4223 4224 return 0; 4225 } 4226 4227 static int restore_user_regs(CPUPPCState *env, 4228 struct target_mcontext *frame, int sig) 4229 { 4230 target_ulong save_r2 = 0; 4231 target_ulong msr; 4232 target_ulong ccr; 4233 4234 int i; 4235 4236 if (!sig) { 4237 save_r2 = env->gpr[2]; 4238 } 4239 4240 /* Restore general registers. */ 4241 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { 4242 if (__get_user(env->gpr[i], &frame->mc_gregs[i])) { 4243 return 1; 4244 } 4245 } 4246 if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]) 4247 || __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]) 4248 || __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]) 4249 || __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER])) 4250 return 1; 4251 if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR])) 4252 return 1; 4253 4254 for (i = 0; i < ARRAY_SIZE(env->crf); i++) { 4255 env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf; 4256 } 4257 4258 if (!sig) { 4259 env->gpr[2] = save_r2; 4260 } 4261 /* Restore MSR. */ 4262 if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR])) 4263 return 1; 4264 4265 /* If doing signal return, restore the previous little-endian mode. */ 4266 if (sig) 4267 env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE); 4268 4269 /* Restore Altivec registers if necessary. */ 4270 if (env->insns_flags & PPC_ALTIVEC) { 4271 for (i = 0; i < ARRAY_SIZE(env->avr); i++) { 4272 ppc_avr_t *avr = &env->avr[i]; 4273 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; 4274 4275 if (__get_user(avr->u64[0], &vreg->u64[0]) || 4276 __get_user(avr->u64[1], &vreg->u64[1])) { 4277 return 1; 4278 } 4279 } 4280 /* Set MSR_VEC in the saved MSR value to indicate that 4281 frame->mc_vregs contains valid data. */ 4282 if (__get_user(env->spr[SPR_VRSAVE], 4283 (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3]))) 4284 return 1; 4285 } 4286 4287 /* Restore floating point registers. */ 4288 if (env->insns_flags & PPC_FLOAT) { 4289 uint64_t fpscr; 4290 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { 4291 if (__get_user(env->fpr[i], &frame->mc_fregs[i])) { 4292 return 1; 4293 } 4294 } 4295 if (__get_user(fpscr, &frame->mc_fregs[32])) 4296 return 1; 4297 env->fpscr = (uint32_t) fpscr; 4298 } 4299 4300 /* Save SPE registers. The kernel only saves the high half. */ 4301 if (env->insns_flags & PPC_SPE) { 4302 #if defined(TARGET_PPC64) 4303 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { 4304 uint32_t hi; 4305 4306 if (__get_user(hi, &frame->mc_vregs.spe[i])) { 4307 return 1; 4308 } 4309 env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]); 4310 } 4311 #else 4312 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { 4313 if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) { 4314 return 1; 4315 } 4316 } 4317 #endif 4318 if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32])) 4319 return 1; 4320 } 4321 4322 return 0; 4323 } 4324 4325 static void setup_frame(int sig, struct target_sigaction *ka, 4326 target_sigset_t *set, CPUPPCState *env) 4327 { 4328 struct target_sigframe *frame; 4329 struct target_sigcontext *sc; 4330 target_ulong frame_addr, newsp; 4331 int err = 0; 4332 int signal; 4333 4334 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 4335 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) 4336 goto sigsegv; 4337 sc = &frame->sctx; 4338 4339 signal = current_exec_domain_sig(sig); 4340 4341 err |= __put_user(h2g(ka->_sa_handler), &sc->handler); 4342 err |= __put_user(set->sig[0], &sc->oldmask); 4343 #if defined(TARGET_PPC64) 4344 err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]); 4345 #else 4346 err |= __put_user(set->sig[1], &sc->_unused[3]); 4347 #endif 4348 err |= __put_user(h2g(&frame->mctx), &sc->regs); 4349 err |= __put_user(sig, &sc->signal); 4350 4351 /* Save user regs. */ 4352 err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn); 4353 4354 /* The kernel checks for the presence of a VDSO here. We don't 4355 emulate a vdso, so use a sigreturn system call. */ 4356 env->lr = (target_ulong) h2g(frame->mctx.tramp); 4357 4358 /* Turn off all fp exceptions. */ 4359 env->fpscr = 0; 4360 4361 /* Create a stack frame for the caller of the handler. */ 4362 newsp = frame_addr - SIGNAL_FRAMESIZE; 4363 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp); 4364 4365 if (err) 4366 goto sigsegv; 4367 4368 /* Set up registers for signal handler. */ 4369 env->gpr[1] = newsp; 4370 env->gpr[3] = signal; 4371 env->gpr[4] = (target_ulong) h2g(sc); 4372 env->nip = (target_ulong) ka->_sa_handler; 4373 /* Signal handlers are entered in big-endian mode. */ 4374 env->msr &= ~MSR_LE; 4375 4376 unlock_user_struct(frame, frame_addr, 1); 4377 return; 4378 4379 sigsegv: 4380 unlock_user_struct(frame, frame_addr, 1); 4381 if (logfile) 4382 fprintf (logfile, "segfaulting from setup_frame\n"); 4383 force_sig(TARGET_SIGSEGV); 4384 } 4385 4386 static void setup_rt_frame(int sig, struct target_sigaction *ka, 4387 target_siginfo_t *info, 4388 target_sigset_t *set, CPUPPCState *env) 4389 { 4390 struct target_rt_sigframe *rt_sf; 4391 struct target_mcontext *frame; 4392 target_ulong rt_sf_addr, newsp = 0; 4393 int i, err = 0; 4394 int signal; 4395 4396 rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf)); 4397 if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1)) 4398 goto sigsegv; 4399 4400 signal = current_exec_domain_sig(sig); 4401 4402 err |= copy_siginfo_to_user(&rt_sf->info, info); 4403 4404 err |= __put_user(0, &rt_sf->uc.tuc_flags); 4405 err |= __put_user(0, &rt_sf->uc.tuc_link); 4406 err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp, 4407 &rt_sf->uc.tuc_stack.ss_sp); 4408 err |= __put_user(sas_ss_flags(env->gpr[1]), 4409 &rt_sf->uc.tuc_stack.ss_flags); 4410 err |= __put_user(target_sigaltstack_used.ss_size, 4411 &rt_sf->uc.tuc_stack.ss_size); 4412 err |= __put_user(h2g (&rt_sf->uc.tuc_mcontext), 4413 &rt_sf->uc.tuc_regs); 4414 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 4415 err |= __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]); 4416 } 4417 4418 frame = &rt_sf->uc.tuc_mcontext; 4419 err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn); 4420 4421 /* The kernel checks for the presence of a VDSO here. We don't 4422 emulate a vdso, so use a sigreturn system call. */ 4423 env->lr = (target_ulong) h2g(frame->tramp); 4424 4425 /* Turn off all fp exceptions. */ 4426 env->fpscr = 0; 4427 4428 /* Create a stack frame for the caller of the handler. */ 4429 newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16); 4430 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp); 4431 4432 if (err) 4433 goto sigsegv; 4434 4435 /* Set up registers for signal handler. */ 4436 env->gpr[1] = newsp; 4437 env->gpr[3] = (target_ulong) signal; 4438 env->gpr[4] = (target_ulong) h2g(&rt_sf->info); 4439 env->gpr[5] = (target_ulong) h2g(&rt_sf->uc); 4440 env->gpr[6] = (target_ulong) h2g(rt_sf); 4441 env->nip = (target_ulong) ka->_sa_handler; 4442 /* Signal handlers are entered in big-endian mode. */ 4443 env->msr &= ~MSR_LE; 4444 4445 unlock_user_struct(rt_sf, rt_sf_addr, 1); 4446 return; 4447 4448 sigsegv: 4449 unlock_user_struct(rt_sf, rt_sf_addr, 1); 4450 if (logfile) 4451 fprintf (logfile, "segfaulting from setup_rt_frame\n"); 4452 force_sig(TARGET_SIGSEGV); 4453 4454 } 4455 4456 long do_sigreturn(CPUPPCState *env) 4457 { 4458 struct target_sigcontext *sc = NULL; 4459 struct target_mcontext *sr = NULL; 4460 target_ulong sr_addr, sc_addr; 4461 sigset_t blocked; 4462 target_sigset_t set; 4463 4464 sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE; 4465 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) 4466 goto sigsegv; 4467 4468 #if defined(TARGET_PPC64) 4469 set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32); 4470 #else 4471 if(__get_user(set.sig[0], &sc->oldmask) || 4472 __get_user(set.sig[1], &sc->_unused[3])) 4473 goto sigsegv; 4474 #endif 4475 target_to_host_sigset_internal(&blocked, &set); 4476 sigprocmask(SIG_SETMASK, &blocked, NULL); 4477 4478 if (__get_user(sr_addr, &sc->regs)) 4479 goto sigsegv; 4480 if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1)) 4481 goto sigsegv; 4482 if (restore_user_regs(env, sr, 1)) 4483 goto sigsegv; 4484 4485 unlock_user_struct(sr, sr_addr, 1); 4486 unlock_user_struct(sc, sc_addr, 1); 4487 return -TARGET_QEMU_ESIGRETURN; 4488 4489 sigsegv: 4490 unlock_user_struct(sr, sr_addr, 1); 4491 unlock_user_struct(sc, sc_addr, 1); 4492 if (logfile) 4493 fprintf (logfile, "segfaulting from do_sigreturn\n"); 4494 force_sig(TARGET_SIGSEGV); 4495 return 0; 4496 } 4497 4498 /* See arch/powerpc/kernel/signal_32.c. */ 4499 static int do_setcontext(struct target_ucontext *ucp, CPUPPCState *env, int sig) 4500 { 4501 struct target_mcontext *mcp; 4502 target_ulong mcp_addr; 4503 sigset_t blocked; 4504 target_sigset_t set; 4505 4506 if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask), 4507 sizeof (set))) 4508 return 1; 4509 4510 #if defined(TARGET_PPC64) 4511 fprintf (stderr, "do_setcontext: not implemented\n"); 4512 return 0; 4513 #else 4514 if (__get_user(mcp_addr, &ucp->tuc_regs)) 4515 return 1; 4516 4517 if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1)) 4518 return 1; 4519 4520 target_to_host_sigset_internal(&blocked, &set); 4521 sigprocmask(SIG_SETMASK, &blocked, NULL); 4522 if (restore_user_regs(env, mcp, sig)) 4523 goto sigsegv; 4524 4525 unlock_user_struct(mcp, mcp_addr, 1); 4526 return 0; 4527 4528 sigsegv: 4529 unlock_user_struct(mcp, mcp_addr, 1); 4530 return 1; 4531 #endif 4532 } 4533 4534 long do_rt_sigreturn(CPUPPCState *env) 4535 { 4536 struct target_rt_sigframe *rt_sf = NULL; 4537 target_ulong rt_sf_addr; 4538 4539 rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16; 4540 if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1)) 4541 goto sigsegv; 4542 4543 if (do_setcontext(&rt_sf->uc, env, 1)) 4544 goto sigsegv; 4545 4546 do_sigaltstack(rt_sf_addr 4547 + offsetof(struct target_rt_sigframe, uc.tuc_stack), 4548 0, env->gpr[1]); 4549 4550 unlock_user_struct(rt_sf, rt_sf_addr, 1); 4551 return -TARGET_QEMU_ESIGRETURN; 4552 4553 sigsegv: 4554 unlock_user_struct(rt_sf, rt_sf_addr, 1); 4555 if (logfile) 4556 fprintf (logfile, "segfaulting from do_rt_sigreturn\n"); 4557 force_sig(TARGET_SIGSEGV); 4558 return 0; 4559 } 4560 4561 #elif defined(TARGET_M68K) 4562 4563 struct target_sigcontext { 4564 abi_ulong sc_mask; 4565 abi_ulong sc_usp; 4566 abi_ulong sc_d0; 4567 abi_ulong sc_d1; 4568 abi_ulong sc_a0; 4569 abi_ulong sc_a1; 4570 unsigned short sc_sr; 4571 abi_ulong sc_pc; 4572 }; 4573 4574 struct target_sigframe 4575 { 4576 abi_ulong pretcode; 4577 int sig; 4578 int code; 4579 abi_ulong psc; 4580 char retcode[8]; 4581 abi_ulong extramask[TARGET_NSIG_WORDS-1]; 4582 struct target_sigcontext sc; 4583 }; 4584 4585 typedef int target_greg_t; 4586 #define TARGET_NGREG 18 4587 typedef target_greg_t target_gregset_t[TARGET_NGREG]; 4588 4589 typedef struct target_fpregset { 4590 int f_fpcntl[3]; 4591 int f_fpregs[8*3]; 4592 } target_fpregset_t; 4593 4594 struct target_mcontext { 4595 int version; 4596 target_gregset_t gregs; 4597 target_fpregset_t fpregs; 4598 }; 4599 4600 #define TARGET_MCONTEXT_VERSION 2 4601 4602 struct target_ucontext { 4603 abi_ulong tuc_flags; 4604 abi_ulong tuc_link; 4605 target_stack_t tuc_stack; 4606 struct target_mcontext tuc_mcontext; 4607 abi_long tuc_filler[80]; 4608 target_sigset_t tuc_sigmask; 4609 }; 4610 4611 struct target_rt_sigframe 4612 { 4613 abi_ulong pretcode; 4614 int sig; 4615 abi_ulong pinfo; 4616 abi_ulong puc; 4617 char retcode[8]; 4618 struct target_siginfo info; 4619 struct target_ucontext uc; 4620 }; 4621 4622 static int 4623 setup_sigcontext(struct target_sigcontext *sc, CPUM68KState *env, 4624 abi_ulong mask) 4625 { 4626 int err = 0; 4627 4628 err |= __put_user(mask, &sc->sc_mask); 4629 err |= __put_user(env->aregs[7], &sc->sc_usp); 4630 err |= __put_user(env->dregs[0], &sc->sc_d0); 4631 err |= __put_user(env->dregs[1], &sc->sc_d1); 4632 err |= __put_user(env->aregs[0], &sc->sc_a0); 4633 err |= __put_user(env->aregs[1], &sc->sc_a1); 4634 err |= __put_user(env->sr, &sc->sc_sr); 4635 err |= __put_user(env->pc, &sc->sc_pc); 4636 4637 return err; 4638 } 4639 4640 static int 4641 restore_sigcontext(CPUM68KState *env, struct target_sigcontext *sc, int *pd0) 4642 { 4643 int err = 0; 4644 int temp; 4645 4646 err |= __get_user(env->aregs[7], &sc->sc_usp); 4647 err |= __get_user(env->dregs[1], &sc->sc_d1); 4648 err |= __get_user(env->aregs[0], &sc->sc_a0); 4649 err |= __get_user(env->aregs[1], &sc->sc_a1); 4650 err |= __get_user(env->pc, &sc->sc_pc); 4651 err |= __get_user(temp, &sc->sc_sr); 4652 env->sr = (env->sr & 0xff00) | (temp & 0xff); 4653 4654 *pd0 = tswapl(sc->sc_d0); 4655 4656 return err; 4657 } 4658 4659 /* 4660 * Determine which stack to use.. 4661 */ 4662 static inline abi_ulong 4663 get_sigframe(struct target_sigaction *ka, CPUM68KState *regs, 4664 size_t frame_size) 4665 { 4666 unsigned long sp; 4667 4668 sp = regs->aregs[7]; 4669 4670 /* This is the X/Open sanctioned signal stack switching. */ 4671 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { 4672 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 4673 } 4674 4675 return ((sp - frame_size) & -8UL); 4676 } 4677 4678 static void setup_frame(int sig, struct target_sigaction *ka, 4679 target_sigset_t *set, CPUM68KState *env) 4680 { 4681 struct target_sigframe *frame; 4682 abi_ulong frame_addr; 4683 abi_ulong retcode_addr; 4684 abi_ulong sc_addr; 4685 int err = 0; 4686 int i; 4687 4688 frame_addr = get_sigframe(ka, env, sizeof *frame); 4689 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 4690 goto give_sigsegv; 4691 4692 err |= __put_user(sig, &frame->sig); 4693 4694 sc_addr = frame_addr + offsetof(struct target_sigframe, sc); 4695 err |= __put_user(sc_addr, &frame->psc); 4696 4697 err |= setup_sigcontext(&frame->sc, env, set->sig[0]); 4698 if (err) 4699 goto give_sigsegv; 4700 4701 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 4702 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 4703 goto give_sigsegv; 4704 } 4705 4706 /* Set up to return from userspace. */ 4707 4708 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode); 4709 err |= __put_user(retcode_addr, &frame->pretcode); 4710 4711 /* moveq #,d0; trap #0 */ 4712 4713 err |= __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16), 4714 (long *)(frame->retcode)); 4715 4716 if (err) 4717 goto give_sigsegv; 4718 4719 /* Set up to return from userspace */ 4720 4721 env->aregs[7] = frame_addr; 4722 env->pc = ka->_sa_handler; 4723 4724 unlock_user_struct(frame, frame_addr, 1); 4725 return; 4726 4727 give_sigsegv: 4728 unlock_user_struct(frame, frame_addr, 1); 4729 force_sig(TARGET_SIGSEGV); 4730 } 4731 4732 static inline int target_rt_setup_ucontext(struct target_ucontext *uc, 4733 CPUM68KState *env) 4734 { 4735 target_greg_t *gregs = uc->tuc_mcontext.gregs; 4736 int err; 4737 4738 err = __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version); 4739 err |= __put_user(env->dregs[0], &gregs[0]); 4740 err |= __put_user(env->dregs[1], &gregs[1]); 4741 err |= __put_user(env->dregs[2], &gregs[2]); 4742 err |= __put_user(env->dregs[3], &gregs[3]); 4743 err |= __put_user(env->dregs[4], &gregs[4]); 4744 err |= __put_user(env->dregs[5], &gregs[5]); 4745 err |= __put_user(env->dregs[6], &gregs[6]); 4746 err |= __put_user(env->dregs[7], &gregs[7]); 4747 err |= __put_user(env->aregs[0], &gregs[8]); 4748 err |= __put_user(env->aregs[1], &gregs[9]); 4749 err |= __put_user(env->aregs[2], &gregs[10]); 4750 err |= __put_user(env->aregs[3], &gregs[11]); 4751 err |= __put_user(env->aregs[4], &gregs[12]); 4752 err |= __put_user(env->aregs[5], &gregs[13]); 4753 err |= __put_user(env->aregs[6], &gregs[14]); 4754 err |= __put_user(env->aregs[7], &gregs[15]); 4755 err |= __put_user(env->pc, &gregs[16]); 4756 err |= __put_user(env->sr, &gregs[17]); 4757 4758 return err; 4759 } 4760 4761 static inline int target_rt_restore_ucontext(CPUM68KState *env, 4762 struct target_ucontext *uc, 4763 int *pd0) 4764 { 4765 int temp; 4766 int err; 4767 target_greg_t *gregs = uc->tuc_mcontext.gregs; 4768 4769 err = __get_user(temp, &uc->tuc_mcontext.version); 4770 if (temp != TARGET_MCONTEXT_VERSION) 4771 goto badframe; 4772 4773 /* restore passed registers */ 4774 err |= __get_user(env->dregs[0], &gregs[0]); 4775 err |= __get_user(env->dregs[1], &gregs[1]); 4776 err |= __get_user(env->dregs[2], &gregs[2]); 4777 err |= __get_user(env->dregs[3], &gregs[3]); 4778 err |= __get_user(env->dregs[4], &gregs[4]); 4779 err |= __get_user(env->dregs[5], &gregs[5]); 4780 err |= __get_user(env->dregs[6], &gregs[6]); 4781 err |= __get_user(env->dregs[7], &gregs[7]); 4782 err |= __get_user(env->aregs[0], &gregs[8]); 4783 err |= __get_user(env->aregs[1], &gregs[9]); 4784 err |= __get_user(env->aregs[2], &gregs[10]); 4785 err |= __get_user(env->aregs[3], &gregs[11]); 4786 err |= __get_user(env->aregs[4], &gregs[12]); 4787 err |= __get_user(env->aregs[5], &gregs[13]); 4788 err |= __get_user(env->aregs[6], &gregs[14]); 4789 err |= __get_user(env->aregs[7], &gregs[15]); 4790 err |= __get_user(env->pc, &gregs[16]); 4791 err |= __get_user(temp, &gregs[17]); 4792 env->sr = (env->sr & 0xff00) | (temp & 0xff); 4793 4794 *pd0 = env->dregs[0]; 4795 return err; 4796 4797 badframe: 4798 return 1; 4799 } 4800 4801 static void setup_rt_frame(int sig, struct target_sigaction *ka, 4802 target_siginfo_t *info, 4803 target_sigset_t *set, CPUM68KState *env) 4804 { 4805 struct target_rt_sigframe *frame; 4806 abi_ulong frame_addr; 4807 abi_ulong retcode_addr; 4808 abi_ulong info_addr; 4809 abi_ulong uc_addr; 4810 int err = 0; 4811 int i; 4812 4813 frame_addr = get_sigframe(ka, env, sizeof *frame); 4814 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 4815 goto give_sigsegv; 4816 4817 err |= __put_user(sig, &frame->sig); 4818 4819 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info); 4820 err |= __put_user(info_addr, &frame->pinfo); 4821 4822 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc); 4823 err |= __put_user(uc_addr, &frame->puc); 4824 4825 err |= copy_siginfo_to_user(&frame->info, info); 4826 4827 /* Create the ucontext */ 4828 4829 err |= __put_user(0, &frame->uc.tuc_flags); 4830 err |= __put_user(0, &frame->uc.tuc_link); 4831 err |= __put_user(target_sigaltstack_used.ss_sp, 4832 &frame->uc.tuc_stack.ss_sp); 4833 err |= __put_user(sas_ss_flags(env->aregs[7]), 4834 &frame->uc.tuc_stack.ss_flags); 4835 err |= __put_user(target_sigaltstack_used.ss_size, 4836 &frame->uc.tuc_stack.ss_size); 4837 err |= target_rt_setup_ucontext(&frame->uc, env); 4838 4839 if (err) 4840 goto give_sigsegv; 4841 4842 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 4843 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) 4844 goto give_sigsegv; 4845 } 4846 4847 /* Set up to return from userspace. */ 4848 4849 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode); 4850 err |= __put_user(retcode_addr, &frame->pretcode); 4851 4852 /* moveq #,d0; notb d0; trap #0 */ 4853 4854 err |= __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16), 4855 (long *)(frame->retcode + 0)); 4856 err |= __put_user(0x4e40, (short *)(frame->retcode + 4)); 4857 4858 if (err) 4859 goto give_sigsegv; 4860 4861 /* Set up to return from userspace */ 4862 4863 env->aregs[7] = frame_addr; 4864 env->pc = ka->_sa_handler; 4865 4866 unlock_user_struct(frame, frame_addr, 1); 4867 return; 4868 4869 give_sigsegv: 4870 unlock_user_struct(frame, frame_addr, 1); 4871 force_sig(TARGET_SIGSEGV); 4872 } 4873 4874 long do_sigreturn(CPUM68KState *env) 4875 { 4876 struct target_sigframe *frame; 4877 abi_ulong frame_addr = env->aregs[7] - 4; 4878 target_sigset_t target_set; 4879 sigset_t set; 4880 int d0, i; 4881 4882 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 4883 goto badframe; 4884 4885 /* set blocked signals */ 4886 4887 if (__get_user(target_set.sig[0], &frame->sc.sc_mask)) 4888 goto badframe; 4889 4890 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 4891 if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) 4892 goto badframe; 4893 } 4894 4895 target_to_host_sigset_internal(&set, &target_set); 4896 sigprocmask(SIG_SETMASK, &set, NULL); 4897 4898 /* restore registers */ 4899 4900 if (restore_sigcontext(env, &frame->sc, &d0)) 4901 goto badframe; 4902 4903 unlock_user_struct(frame, frame_addr, 0); 4904 return d0; 4905 4906 badframe: 4907 unlock_user_struct(frame, frame_addr, 0); 4908 force_sig(TARGET_SIGSEGV); 4909 return 0; 4910 } 4911 4912 long do_rt_sigreturn(CPUM68KState *env) 4913 { 4914 struct target_rt_sigframe *frame; 4915 abi_ulong frame_addr = env->aregs[7] - 4; 4916 target_sigset_t target_set; 4917 sigset_t set; 4918 int d0; 4919 4920 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 4921 goto badframe; 4922 4923 target_to_host_sigset_internal(&set, &target_set); 4924 sigprocmask(SIG_SETMASK, &set, NULL); 4925 4926 /* restore registers */ 4927 4928 if (target_rt_restore_ucontext(env, &frame->uc, &d0)) 4929 goto badframe; 4930 4931 if (do_sigaltstack(frame_addr + 4932 offsetof(struct target_rt_sigframe, uc.tuc_stack), 4933 0, get_sp_from_cpustate(env)) == -EFAULT) 4934 goto badframe; 4935 4936 unlock_user_struct(frame, frame_addr, 0); 4937 return d0; 4938 4939 badframe: 4940 unlock_user_struct(frame, frame_addr, 0); 4941 force_sig(TARGET_SIGSEGV); 4942 return 0; 4943 } 4944 4945 #elif defined(TARGET_ALPHA) 4946 4947 struct target_sigcontext { 4948 abi_long sc_onstack; 4949 abi_long sc_mask; 4950 abi_long sc_pc; 4951 abi_long sc_ps; 4952 abi_long sc_regs[32]; 4953 abi_long sc_ownedfp; 4954 abi_long sc_fpregs[32]; 4955 abi_ulong sc_fpcr; 4956 abi_ulong sc_fp_control; 4957 abi_ulong sc_reserved1; 4958 abi_ulong sc_reserved2; 4959 abi_ulong sc_ssize; 4960 abi_ulong sc_sbase; 4961 abi_ulong sc_traparg_a0; 4962 abi_ulong sc_traparg_a1; 4963 abi_ulong sc_traparg_a2; 4964 abi_ulong sc_fp_trap_pc; 4965 abi_ulong sc_fp_trigger_sum; 4966 abi_ulong sc_fp_trigger_inst; 4967 }; 4968 4969 struct target_ucontext { 4970 abi_ulong tuc_flags; 4971 abi_ulong tuc_link; 4972 abi_ulong tuc_osf_sigmask; 4973 target_stack_t tuc_stack; 4974 struct target_sigcontext tuc_mcontext; 4975 target_sigset_t tuc_sigmask; 4976 }; 4977 4978 struct target_sigframe { 4979 struct target_sigcontext sc; 4980 unsigned int retcode[3]; 4981 }; 4982 4983 struct target_rt_sigframe { 4984 target_siginfo_t info; 4985 struct target_ucontext uc; 4986 unsigned int retcode[3]; 4987 }; 4988 4989 #define INSN_MOV_R30_R16 0x47fe0410 4990 #define INSN_LDI_R0 0x201f0000 4991 #define INSN_CALLSYS 0x00000083 4992 4993 static int setup_sigcontext(struct target_sigcontext *sc, CPUAlphaState *env, 4994 abi_ulong frame_addr, target_sigset_t *set) 4995 { 4996 int i, err = 0; 4997 4998 err |= __put_user(on_sig_stack(frame_addr), &sc->sc_onstack); 4999 err |= __put_user(set->sig[0], &sc->sc_mask); 5000 err |= __put_user(env->pc, &sc->sc_pc); 5001 err |= __put_user(8, &sc->sc_ps); 5002 5003 for (i = 0; i < 31; ++i) { 5004 err |= __put_user(env->ir[i], &sc->sc_regs[i]); 5005 } 5006 err |= __put_user(0, &sc->sc_regs[31]); 5007 5008 for (i = 0; i < 31; ++i) { 5009 err |= __put_user(env->fir[i], &sc->sc_fpregs[i]); 5010 } 5011 err |= __put_user(0, &sc->sc_fpregs[31]); 5012 err |= __put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr); 5013 5014 err |= __put_user(0, &sc->sc_traparg_a0); /* FIXME */ 5015 err |= __put_user(0, &sc->sc_traparg_a1); /* FIXME */ 5016 err |= __put_user(0, &sc->sc_traparg_a2); /* FIXME */ 5017 5018 return err; 5019 } 5020 5021 static int restore_sigcontext(CPUAlphaState *env, 5022 struct target_sigcontext *sc) 5023 { 5024 uint64_t fpcr; 5025 int i, err = 0; 5026 5027 err |= __get_user(env->pc, &sc->sc_pc); 5028 5029 for (i = 0; i < 31; ++i) { 5030 err |= __get_user(env->ir[i], &sc->sc_regs[i]); 5031 } 5032 for (i = 0; i < 31; ++i) { 5033 err |= __get_user(env->fir[i], &sc->sc_fpregs[i]); 5034 } 5035 5036 err |= __get_user(fpcr, &sc->sc_fpcr); 5037 cpu_alpha_store_fpcr(env, fpcr); 5038 5039 return err; 5040 } 5041 5042 static inline abi_ulong get_sigframe(struct target_sigaction *sa, 5043 CPUAlphaState *env, 5044 unsigned long framesize) 5045 { 5046 abi_ulong sp = env->ir[IR_SP]; 5047 5048 /* This is the X/Open sanctioned signal stack switching. */ 5049 if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) { 5050 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 5051 } 5052 return (sp - framesize) & -32; 5053 } 5054 5055 static void setup_frame(int sig, struct target_sigaction *ka, 5056 target_sigset_t *set, CPUAlphaState *env) 5057 { 5058 abi_ulong frame_addr, r26; 5059 struct target_sigframe *frame; 5060 int err = 0; 5061 5062 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 5063 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { 5064 goto give_sigsegv; 5065 } 5066 5067 err |= setup_sigcontext(&frame->sc, env, frame_addr, set); 5068 5069 if (ka->sa_restorer) { 5070 r26 = ka->sa_restorer; 5071 } else { 5072 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]); 5073 err |= __put_user(INSN_LDI_R0 + TARGET_NR_sigreturn, 5074 &frame->retcode[1]); 5075 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]); 5076 /* imb() */ 5077 r26 = frame_addr; 5078 } 5079 5080 unlock_user_struct(frame, frame_addr, 1); 5081 5082 if (err) { 5083 give_sigsegv: 5084 if (sig == TARGET_SIGSEGV) { 5085 ka->_sa_handler = TARGET_SIG_DFL; 5086 } 5087 force_sig(TARGET_SIGSEGV); 5088 } 5089 5090 env->ir[IR_RA] = r26; 5091 env->ir[IR_PV] = env->pc = ka->_sa_handler; 5092 env->ir[IR_A0] = sig; 5093 env->ir[IR_A1] = 0; 5094 env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc); 5095 env->ir[IR_SP] = frame_addr; 5096 } 5097 5098 static void setup_rt_frame(int sig, struct target_sigaction *ka, 5099 target_siginfo_t *info, 5100 target_sigset_t *set, CPUAlphaState *env) 5101 { 5102 abi_ulong frame_addr, r26; 5103 struct target_rt_sigframe *frame; 5104 int i, err = 0; 5105 5106 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 5107 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { 5108 goto give_sigsegv; 5109 } 5110 5111 err |= copy_siginfo_to_user(&frame->info, info); 5112 5113 err |= __put_user(0, &frame->uc.tuc_flags); 5114 err |= __put_user(0, &frame->uc.tuc_link); 5115 err |= __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask); 5116 err |= __put_user(target_sigaltstack_used.ss_sp, 5117 &frame->uc.tuc_stack.ss_sp); 5118 err |= __put_user(sas_ss_flags(env->ir[IR_SP]), 5119 &frame->uc.tuc_stack.ss_flags); 5120 err |= __put_user(target_sigaltstack_used.ss_size, 5121 &frame->uc.tuc_stack.ss_size); 5122 err |= setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set); 5123 for (i = 0; i < TARGET_NSIG_WORDS; ++i) { 5124 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); 5125 } 5126 5127 if (ka->sa_restorer) { 5128 r26 = ka->sa_restorer; 5129 } else { 5130 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]); 5131 err |= __put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn, 5132 &frame->retcode[1]); 5133 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]); 5134 /* imb(); */ 5135 r26 = frame_addr; 5136 } 5137 5138 if (err) { 5139 give_sigsegv: 5140 if (sig == TARGET_SIGSEGV) { 5141 ka->_sa_handler = TARGET_SIG_DFL; 5142 } 5143 force_sig(TARGET_SIGSEGV); 5144 } 5145 5146 env->ir[IR_RA] = r26; 5147 env->ir[IR_PV] = env->pc = ka->_sa_handler; 5148 env->ir[IR_A0] = sig; 5149 env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info); 5150 env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc); 5151 env->ir[IR_SP] = frame_addr; 5152 } 5153 5154 long do_sigreturn(CPUAlphaState *env) 5155 { 5156 struct target_sigcontext *sc; 5157 abi_ulong sc_addr = env->ir[IR_A0]; 5158 target_sigset_t target_set; 5159 sigset_t set; 5160 5161 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) { 5162 goto badframe; 5163 } 5164 5165 target_sigemptyset(&target_set); 5166 if (__get_user(target_set.sig[0], &sc->sc_mask)) { 5167 goto badframe; 5168 } 5169 5170 target_to_host_sigset_internal(&set, &target_set); 5171 sigprocmask(SIG_SETMASK, &set, NULL); 5172 5173 if (restore_sigcontext(env, sc)) { 5174 goto badframe; 5175 } 5176 unlock_user_struct(sc, sc_addr, 0); 5177 return env->ir[IR_V0]; 5178 5179 badframe: 5180 unlock_user_struct(sc, sc_addr, 0); 5181 force_sig(TARGET_SIGSEGV); 5182 } 5183 5184 long do_rt_sigreturn(CPUAlphaState *env) 5185 { 5186 abi_ulong frame_addr = env->ir[IR_A0]; 5187 struct target_rt_sigframe *frame; 5188 sigset_t set; 5189 5190 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { 5191 goto badframe; 5192 } 5193 target_to_host_sigset(&set, &frame->uc.tuc_sigmask); 5194 sigprocmask(SIG_SETMASK, &set, NULL); 5195 5196 if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) { 5197 goto badframe; 5198 } 5199 if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, 5200 uc.tuc_stack), 5201 0, env->ir[IR_SP]) == -EFAULT) { 5202 goto badframe; 5203 } 5204 5205 unlock_user_struct(frame, frame_addr, 0); 5206 return env->ir[IR_V0]; 5207 5208 5209 badframe: 5210 unlock_user_struct(frame, frame_addr, 0); 5211 force_sig(TARGET_SIGSEGV); 5212 } 5213 5214 #else 5215 5216 static void setup_frame(int sig, struct target_sigaction *ka, 5217 target_sigset_t *set, CPUArchState *env) 5218 { 5219 fprintf(stderr, "setup_frame: not implemented\n"); 5220 } 5221 5222 static void setup_rt_frame(int sig, struct target_sigaction *ka, 5223 target_siginfo_t *info, 5224 target_sigset_t *set, CPUArchState *env) 5225 { 5226 fprintf(stderr, "setup_rt_frame: not implemented\n"); 5227 } 5228 5229 long do_sigreturn(CPUArchState *env) 5230 { 5231 fprintf(stderr, "do_sigreturn: not implemented\n"); 5232 return -TARGET_ENOSYS; 5233 } 5234 5235 long do_rt_sigreturn(CPUArchState *env) 5236 { 5237 fprintf(stderr, "do_rt_sigreturn: not implemented\n"); 5238 return -TARGET_ENOSYS; 5239 } 5240 5241 #endif 5242 5243 void process_pending_signals(CPUArchState *cpu_env) 5244 { 5245 int sig; 5246 abi_ulong handler; 5247 sigset_t set, old_set; 5248 target_sigset_t target_old_set; 5249 struct emulated_sigtable *k; 5250 struct target_sigaction *sa; 5251 struct sigqueue *q; 5252 TaskState *ts = cpu_env->opaque; 5253 5254 if (!ts->signal_pending) 5255 return; 5256 5257 /* FIXME: This is not threadsafe. */ 5258 k = ts->sigtab; 5259 for(sig = 1; sig <= TARGET_NSIG; sig++) { 5260 if (k->pending) 5261 goto handle_signal; 5262 k++; 5263 } 5264 /* if no signal is pending, just return */ 5265 ts->signal_pending = 0; 5266 return; 5267 5268 handle_signal: 5269 #ifdef DEBUG_SIGNAL 5270 fprintf(stderr, "qemu: process signal %d\n", sig); 5271 #endif 5272 /* dequeue signal */ 5273 q = k->first; 5274 k->first = q->next; 5275 if (!k->first) 5276 k->pending = 0; 5277 5278 sig = gdb_handlesig (cpu_env, sig); 5279 if (!sig) { 5280 sa = NULL; 5281 handler = TARGET_SIG_IGN; 5282 } else { 5283 sa = &sigact_table[sig - 1]; 5284 handler = sa->_sa_handler; 5285 } 5286 5287 if (handler == TARGET_SIG_DFL) { 5288 /* default handler : ignore some signal. The other are job control or fatal */ 5289 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) { 5290 kill(getpid(),SIGSTOP); 5291 } else if (sig != TARGET_SIGCHLD && 5292 sig != TARGET_SIGURG && 5293 sig != TARGET_SIGWINCH && 5294 sig != TARGET_SIGCONT) { 5295 force_sig(sig); 5296 } 5297 } else if (handler == TARGET_SIG_IGN) { 5298 /* ignore sig */ 5299 } else if (handler == TARGET_SIG_ERR) { 5300 force_sig(sig); 5301 } else { 5302 /* compute the blocked signals during the handler execution */ 5303 target_to_host_sigset(&set, &sa->sa_mask); 5304 /* SA_NODEFER indicates that the current signal should not be 5305 blocked during the handler */ 5306 if (!(sa->sa_flags & TARGET_SA_NODEFER)) 5307 sigaddset(&set, target_to_host_signal(sig)); 5308 5309 /* block signals in the handler using Linux */ 5310 sigprocmask(SIG_BLOCK, &set, &old_set); 5311 /* save the previous blocked signal state to restore it at the 5312 end of the signal execution (see do_sigreturn) */ 5313 host_to_target_sigset_internal(&target_old_set, &old_set); 5314 5315 /* if the CPU is in VM86 mode, we restore the 32 bit values */ 5316 #if defined(TARGET_I386) && !defined(TARGET_X86_64) 5317 { 5318 CPUX86State *env = cpu_env; 5319 if (env->eflags & VM_MASK) 5320 save_v86_state(env); 5321 } 5322 #endif 5323 /* prepare the stack frame of the virtual CPU */ 5324 if (sa->sa_flags & TARGET_SA_SIGINFO) 5325 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env); 5326 else 5327 setup_frame(sig, sa, &target_old_set, cpu_env); 5328 if (sa->sa_flags & TARGET_SA_RESETHAND) 5329 sa->_sa_handler = TARGET_SIG_DFL; 5330 } 5331 if (q != &k->info) 5332 free_sigqueue(cpu_env, q); 5333 } 5334