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, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 * MA 02110-1301, USA. 20 */ 21 #include <stdlib.h> 22 #include <stdio.h> 23 #include <string.h> 24 #include <stdarg.h> 25 #include <unistd.h> 26 #include <signal.h> 27 #include <errno.h> 28 #include <assert.h> 29 #include <sys/ucontext.h> 30 #include <sys/resource.h> 31 32 #include "qemu.h" 33 #include "qemu-common.h" 34 #include "target_signal.h" 35 36 //#define DEBUG_SIGNAL 37 38 static struct target_sigaltstack target_sigaltstack_used = { 39 .ss_sp = 0, 40 .ss_size = 0, 41 .ss_flags = TARGET_SS_DISABLE, 42 }; 43 44 static struct target_sigaction sigact_table[TARGET_NSIG]; 45 46 static void host_signal_handler(int host_signum, siginfo_t *info, 47 void *puc); 48 49 static uint8_t host_to_target_signal_table[65] = { 50 [SIGHUP] = TARGET_SIGHUP, 51 [SIGINT] = TARGET_SIGINT, 52 [SIGQUIT] = TARGET_SIGQUIT, 53 [SIGILL] = TARGET_SIGILL, 54 [SIGTRAP] = TARGET_SIGTRAP, 55 [SIGABRT] = TARGET_SIGABRT, 56 /* [SIGIOT] = TARGET_SIGIOT,*/ 57 [SIGBUS] = TARGET_SIGBUS, 58 [SIGFPE] = TARGET_SIGFPE, 59 [SIGKILL] = TARGET_SIGKILL, 60 [SIGUSR1] = TARGET_SIGUSR1, 61 [SIGSEGV] = TARGET_SIGSEGV, 62 [SIGUSR2] = TARGET_SIGUSR2, 63 [SIGPIPE] = TARGET_SIGPIPE, 64 [SIGALRM] = TARGET_SIGALRM, 65 [SIGTERM] = TARGET_SIGTERM, 66 #ifdef SIGSTKFLT 67 [SIGSTKFLT] = TARGET_SIGSTKFLT, 68 #endif 69 [SIGCHLD] = TARGET_SIGCHLD, 70 [SIGCONT] = TARGET_SIGCONT, 71 [SIGSTOP] = TARGET_SIGSTOP, 72 [SIGTSTP] = TARGET_SIGTSTP, 73 [SIGTTIN] = TARGET_SIGTTIN, 74 [SIGTTOU] = TARGET_SIGTTOU, 75 [SIGURG] = TARGET_SIGURG, 76 [SIGXCPU] = TARGET_SIGXCPU, 77 [SIGXFSZ] = TARGET_SIGXFSZ, 78 [SIGVTALRM] = TARGET_SIGVTALRM, 79 [SIGPROF] = TARGET_SIGPROF, 80 [SIGWINCH] = TARGET_SIGWINCH, 81 [SIGIO] = TARGET_SIGIO, 82 [SIGPWR] = TARGET_SIGPWR, 83 [SIGSYS] = TARGET_SIGSYS, 84 /* next signals stay the same */ 85 /* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with 86 host libpthread signals. This assumes noone actually uses SIGRTMAX :-/ 87 To fix this properly we need to do manual signal delivery multiplexed 88 over a single host signal. */ 89 [__SIGRTMIN] = __SIGRTMAX, 90 [__SIGRTMAX] = __SIGRTMIN, 91 }; 92 static uint8_t target_to_host_signal_table[65]; 93 94 static inline int on_sig_stack(unsigned long sp) 95 { 96 return (sp - target_sigaltstack_used.ss_sp 97 < target_sigaltstack_used.ss_size); 98 } 99 100 static inline int sas_ss_flags(unsigned long sp) 101 { 102 return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE 103 : on_sig_stack(sp) ? SS_ONSTACK : 0); 104 } 105 106 int host_to_target_signal(int sig) 107 { 108 if (sig > 64) 109 return sig; 110 return host_to_target_signal_table[sig]; 111 } 112 113 int target_to_host_signal(int sig) 114 { 115 if (sig > 64) 116 return sig; 117 return target_to_host_signal_table[sig]; 118 } 119 120 static inline void target_sigemptyset(target_sigset_t *set) 121 { 122 memset(set, 0, sizeof(*set)); 123 } 124 125 static inline void target_sigaddset(target_sigset_t *set, int signum) 126 { 127 signum--; 128 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW); 129 set->sig[signum / TARGET_NSIG_BPW] |= mask; 130 } 131 132 static inline int target_sigismember(const target_sigset_t *set, int signum) 133 { 134 signum--; 135 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW); 136 return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0); 137 } 138 139 static void host_to_target_sigset_internal(target_sigset_t *d, 140 const sigset_t *s) 141 { 142 int i; 143 target_sigemptyset(d); 144 for (i = 1; i <= TARGET_NSIG; i++) { 145 if (sigismember(s, i)) { 146 target_sigaddset(d, host_to_target_signal(i)); 147 } 148 } 149 } 150 151 void host_to_target_sigset(target_sigset_t *d, const sigset_t *s) 152 { 153 target_sigset_t d1; 154 int i; 155 156 host_to_target_sigset_internal(&d1, s); 157 for(i = 0;i < TARGET_NSIG_WORDS; i++) 158 d->sig[i] = tswapl(d1.sig[i]); 159 } 160 161 static void target_to_host_sigset_internal(sigset_t *d, 162 const target_sigset_t *s) 163 { 164 int i; 165 sigemptyset(d); 166 for (i = 1; i <= TARGET_NSIG; i++) { 167 if (target_sigismember(s, i)) { 168 sigaddset(d, target_to_host_signal(i)); 169 } 170 } 171 } 172 173 void target_to_host_sigset(sigset_t *d, const target_sigset_t *s) 174 { 175 target_sigset_t s1; 176 int i; 177 178 for(i = 0;i < TARGET_NSIG_WORDS; i++) 179 s1.sig[i] = tswapl(s->sig[i]); 180 target_to_host_sigset_internal(d, &s1); 181 } 182 183 void host_to_target_old_sigset(abi_ulong *old_sigset, 184 const sigset_t *sigset) 185 { 186 target_sigset_t d; 187 host_to_target_sigset(&d, sigset); 188 *old_sigset = d.sig[0]; 189 } 190 191 void target_to_host_old_sigset(sigset_t *sigset, 192 const abi_ulong *old_sigset) 193 { 194 target_sigset_t d; 195 int i; 196 197 d.sig[0] = *old_sigset; 198 for(i = 1;i < TARGET_NSIG_WORDS; i++) 199 d.sig[i] = 0; 200 target_to_host_sigset(sigset, &d); 201 } 202 203 /* siginfo conversion */ 204 205 static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo, 206 const siginfo_t *info) 207 { 208 int sig; 209 sig = host_to_target_signal(info->si_signo); 210 tinfo->si_signo = sig; 211 tinfo->si_errno = 0; 212 tinfo->si_code = info->si_code; 213 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV || 214 sig == SIGBUS || sig == SIGTRAP) { 215 /* should never come here, but who knows. The information for 216 the target is irrelevant */ 217 tinfo->_sifields._sigfault._addr = 0; 218 } else if (sig == SIGIO) { 219 tinfo->_sifields._sigpoll._fd = info->si_fd; 220 } else if (sig >= TARGET_SIGRTMIN) { 221 tinfo->_sifields._rt._pid = info->si_pid; 222 tinfo->_sifields._rt._uid = info->si_uid; 223 /* XXX: potential problem if 64 bit */ 224 tinfo->_sifields._rt._sigval.sival_ptr = 225 (abi_ulong)(unsigned long)info->si_value.sival_ptr; 226 } 227 } 228 229 static void tswap_siginfo(target_siginfo_t *tinfo, 230 const target_siginfo_t *info) 231 { 232 int sig; 233 sig = info->si_signo; 234 tinfo->si_signo = tswap32(sig); 235 tinfo->si_errno = tswap32(info->si_errno); 236 tinfo->si_code = tswap32(info->si_code); 237 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV || 238 sig == SIGBUS || sig == SIGTRAP) { 239 tinfo->_sifields._sigfault._addr = 240 tswapl(info->_sifields._sigfault._addr); 241 } else if (sig == SIGIO) { 242 tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd); 243 } else if (sig >= TARGET_SIGRTMIN) { 244 tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid); 245 tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid); 246 tinfo->_sifields._rt._sigval.sival_ptr = 247 tswapl(info->_sifields._rt._sigval.sival_ptr); 248 } 249 } 250 251 252 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info) 253 { 254 host_to_target_siginfo_noswap(tinfo, info); 255 tswap_siginfo(tinfo, tinfo); 256 } 257 258 /* XXX: we support only POSIX RT signals are used. */ 259 /* XXX: find a solution for 64 bit (additional malloced data is needed) */ 260 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo) 261 { 262 info->si_signo = tswap32(tinfo->si_signo); 263 info->si_errno = tswap32(tinfo->si_errno); 264 info->si_code = tswap32(tinfo->si_code); 265 info->si_pid = tswap32(tinfo->_sifields._rt._pid); 266 info->si_uid = tswap32(tinfo->_sifields._rt._uid); 267 info->si_value.sival_ptr = 268 (void *)(long)tswapl(tinfo->_sifields._rt._sigval.sival_ptr); 269 } 270 271 static int fatal_signal (int sig) 272 { 273 switch (sig) { 274 case TARGET_SIGCHLD: 275 case TARGET_SIGURG: 276 case TARGET_SIGWINCH: 277 /* Ignored by default. */ 278 return 0; 279 case TARGET_SIGCONT: 280 case TARGET_SIGSTOP: 281 case TARGET_SIGTSTP: 282 case TARGET_SIGTTIN: 283 case TARGET_SIGTTOU: 284 /* Job control signals. */ 285 return 0; 286 default: 287 return 1; 288 } 289 } 290 291 /* returns 1 if given signal should dump core if not handled */ 292 static int core_dump_signal(int sig) 293 { 294 switch (sig) { 295 case TARGET_SIGABRT: 296 case TARGET_SIGFPE: 297 case TARGET_SIGILL: 298 case TARGET_SIGQUIT: 299 case TARGET_SIGSEGV: 300 case TARGET_SIGTRAP: 301 case TARGET_SIGBUS: 302 return (1); 303 default: 304 return (0); 305 } 306 } 307 308 void signal_init(void) 309 { 310 struct sigaction act; 311 struct sigaction oact; 312 int i, j; 313 int host_sig; 314 315 /* generate signal conversion tables */ 316 for(i = 1; i <= 64; i++) { 317 if (host_to_target_signal_table[i] == 0) 318 host_to_target_signal_table[i] = i; 319 } 320 for(i = 1; i <= 64; i++) { 321 j = host_to_target_signal_table[i]; 322 target_to_host_signal_table[j] = i; 323 } 324 325 /* set all host signal handlers. ALL signals are blocked during 326 the handlers to serialize them. */ 327 memset(sigact_table, 0, sizeof(sigact_table)); 328 329 sigfillset(&act.sa_mask); 330 act.sa_flags = SA_SIGINFO; 331 act.sa_sigaction = host_signal_handler; 332 for(i = 1; i <= TARGET_NSIG; i++) { 333 host_sig = target_to_host_signal(i); 334 sigaction(host_sig, NULL, &oact); 335 if (oact.sa_sigaction == (void *)SIG_IGN) { 336 sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN; 337 } else if (oact.sa_sigaction == (void *)SIG_DFL) { 338 sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL; 339 } 340 /* If there's already a handler installed then something has 341 gone horribly wrong, so don't even try to handle that case. */ 342 /* Install some handlers for our own use. We need at least 343 SIGSEGV and SIGBUS, to detect exceptions. We can not just 344 trap all signals because it affects syscall interrupt 345 behavior. But do trap all default-fatal signals. */ 346 if (fatal_signal (i)) 347 sigaction(host_sig, &act, NULL); 348 } 349 } 350 351 /* signal queue handling */ 352 353 static inline struct sigqueue *alloc_sigqueue(CPUState *env) 354 { 355 TaskState *ts = env->opaque; 356 struct sigqueue *q = ts->first_free; 357 if (!q) 358 return NULL; 359 ts->first_free = q->next; 360 return q; 361 } 362 363 static inline void free_sigqueue(CPUState *env, struct sigqueue *q) 364 { 365 TaskState *ts = env->opaque; 366 q->next = ts->first_free; 367 ts->first_free = q; 368 } 369 370 /* abort execution with signal */ 371 static void QEMU_NORETURN force_sig(int sig) 372 { 373 TaskState *ts = (TaskState *)thread_env->opaque; 374 int host_sig, core_dumped = 0; 375 struct sigaction act; 376 host_sig = target_to_host_signal(sig); 377 gdb_signalled(thread_env, sig); 378 379 /* dump core if supported by target binary format */ 380 if (core_dump_signal(sig) && (ts->bprm->core_dump != NULL)) { 381 stop_all_tasks(); 382 core_dumped = 383 ((*ts->bprm->core_dump)(sig, thread_env) == 0); 384 } 385 if (core_dumped) { 386 /* we already dumped the core of target process, we don't want 387 * a coredump of qemu itself */ 388 struct rlimit nodump; 389 getrlimit(RLIMIT_CORE, &nodump); 390 nodump.rlim_cur=0; 391 setrlimit(RLIMIT_CORE, &nodump); 392 (void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n", 393 sig, strsignal(host_sig), "core dumped" ); 394 } 395 396 /* The proper exit code for dieing from an uncaught signal is 397 * -<signal>. The kernel doesn't allow exit() or _exit() to pass 398 * a negative value. To get the proper exit code we need to 399 * actually die from an uncaught signal. Here the default signal 400 * handler is installed, we send ourself a signal and we wait for 401 * it to arrive. */ 402 sigfillset(&act.sa_mask); 403 act.sa_handler = SIG_DFL; 404 sigaction(host_sig, &act, NULL); 405 406 /* For some reason raise(host_sig) doesn't send the signal when 407 * statically linked on x86-64. */ 408 kill(getpid(), host_sig); 409 410 /* Make sure the signal isn't masked (just reuse the mask inside 411 of act) */ 412 sigdelset(&act.sa_mask, host_sig); 413 sigsuspend(&act.sa_mask); 414 415 /* unreachable */ 416 assert(0); 417 418 } 419 420 /* queue a signal so that it will be send to the virtual CPU as soon 421 as possible */ 422 int queue_signal(CPUState *env, int sig, target_siginfo_t *info) 423 { 424 TaskState *ts = env->opaque; 425 struct emulated_sigtable *k; 426 struct sigqueue *q, **pq; 427 abi_ulong handler; 428 int queue; 429 430 #if defined(DEBUG_SIGNAL) 431 fprintf(stderr, "queue_signal: sig=%d\n", 432 sig); 433 #endif 434 k = &ts->sigtab[sig - 1]; 435 queue = gdb_queuesig (); 436 handler = sigact_table[sig - 1]._sa_handler; 437 if (!queue && handler == TARGET_SIG_DFL) { 438 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) { 439 kill(getpid(),SIGSTOP); 440 return 0; 441 } else 442 /* default handler : ignore some signal. The other are fatal */ 443 if (sig != TARGET_SIGCHLD && 444 sig != TARGET_SIGURG && 445 sig != TARGET_SIGWINCH && 446 sig != TARGET_SIGCONT) { 447 force_sig(sig); 448 } else { 449 return 0; /* indicate ignored */ 450 } 451 } else if (!queue && handler == TARGET_SIG_IGN) { 452 /* ignore signal */ 453 return 0; 454 } else if (!queue && handler == TARGET_SIG_ERR) { 455 force_sig(sig); 456 } else { 457 pq = &k->first; 458 if (sig < TARGET_SIGRTMIN) { 459 /* if non real time signal, we queue exactly one signal */ 460 if (!k->pending) 461 q = &k->info; 462 else 463 return 0; 464 } else { 465 if (!k->pending) { 466 /* first signal */ 467 q = &k->info; 468 } else { 469 q = alloc_sigqueue(env); 470 if (!q) 471 return -EAGAIN; 472 while (*pq != NULL) 473 pq = &(*pq)->next; 474 } 475 } 476 *pq = q; 477 q->info = *info; 478 q->next = NULL; 479 k->pending = 1; 480 /* signal that a new signal is pending */ 481 ts->signal_pending = 1; 482 return 1; /* indicates that the signal was queued */ 483 } 484 } 485 486 static void host_signal_handler(int host_signum, siginfo_t *info, 487 void *puc) 488 { 489 int sig; 490 target_siginfo_t tinfo; 491 492 /* the CPU emulator uses some host signals to detect exceptions, 493 we forward to it some signals */ 494 if ((host_signum == SIGSEGV || host_signum == SIGBUS) 495 && info->si_code > 0) { 496 if (cpu_signal_handler(host_signum, info, puc)) 497 return; 498 } 499 500 /* get target signal number */ 501 sig = host_to_target_signal(host_signum); 502 if (sig < 1 || sig > TARGET_NSIG) 503 return; 504 #if defined(DEBUG_SIGNAL) 505 fprintf(stderr, "qemu: got signal %d\n", sig); 506 #endif 507 host_to_target_siginfo_noswap(&tinfo, info); 508 if (queue_signal(thread_env, sig, &tinfo) == 1) { 509 /* interrupt the virtual CPU as soon as possible */ 510 cpu_exit(thread_env); 511 } 512 } 513 514 /* do_sigaltstack() returns target values and errnos. */ 515 /* compare linux/kernel/signal.c:do_sigaltstack() */ 516 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp) 517 { 518 int ret; 519 struct target_sigaltstack oss; 520 521 /* XXX: test errors */ 522 if(uoss_addr) 523 { 524 __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp); 525 __put_user(target_sigaltstack_used.ss_size, &oss.ss_size); 526 __put_user(sas_ss_flags(sp), &oss.ss_flags); 527 } 528 529 if(uss_addr) 530 { 531 struct target_sigaltstack *uss; 532 struct target_sigaltstack ss; 533 534 ret = -TARGET_EFAULT; 535 if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1) 536 || __get_user(ss.ss_sp, &uss->ss_sp) 537 || __get_user(ss.ss_size, &uss->ss_size) 538 || __get_user(ss.ss_flags, &uss->ss_flags)) 539 goto out; 540 unlock_user_struct(uss, uss_addr, 0); 541 542 ret = -TARGET_EPERM; 543 if (on_sig_stack(sp)) 544 goto out; 545 546 ret = -TARGET_EINVAL; 547 if (ss.ss_flags != TARGET_SS_DISABLE 548 && ss.ss_flags != TARGET_SS_ONSTACK 549 && ss.ss_flags != 0) 550 goto out; 551 552 if (ss.ss_flags == TARGET_SS_DISABLE) { 553 ss.ss_size = 0; 554 ss.ss_sp = 0; 555 } else { 556 ret = -TARGET_ENOMEM; 557 if (ss.ss_size < MINSIGSTKSZ) 558 goto out; 559 } 560 561 target_sigaltstack_used.ss_sp = ss.ss_sp; 562 target_sigaltstack_used.ss_size = ss.ss_size; 563 } 564 565 if (uoss_addr) { 566 ret = -TARGET_EFAULT; 567 if (copy_to_user(uoss_addr, &oss, sizeof(oss))) 568 goto out; 569 } 570 571 ret = 0; 572 out: 573 return ret; 574 } 575 576 /* do_sigaction() return host values and errnos */ 577 int do_sigaction(int sig, const struct target_sigaction *act, 578 struct target_sigaction *oact) 579 { 580 struct target_sigaction *k; 581 struct sigaction act1; 582 int host_sig; 583 int ret = 0; 584 585 if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP) 586 return -EINVAL; 587 k = &sigact_table[sig - 1]; 588 #if defined(DEBUG_SIGNAL) 589 fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n", 590 sig, (int)act, (int)oact); 591 #endif 592 if (oact) { 593 oact->_sa_handler = tswapl(k->_sa_handler); 594 oact->sa_flags = tswapl(k->sa_flags); 595 #if !defined(TARGET_MIPS) 596 oact->sa_restorer = tswapl(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 = tswapl(act->_sa_handler); 603 k->sa_flags = tswapl(act->sa_flags); 604 #if !defined(TARGET_MIPS) 605 k->sa_restorer = tswapl(act->sa_restorer); 606 #endif 607 k->sa_mask = act->sa_mask; 608 609 /* we update the host linux signal state */ 610 host_sig = target_to_host_signal(sig); 611 if (host_sig != SIGSEGV && host_sig != SIGBUS) { 612 sigfillset(&act1.sa_mask); 613 act1.sa_flags = SA_SIGINFO; 614 if (k->sa_flags & TARGET_SA_RESTART) 615 act1.sa_flags |= SA_RESTART; 616 /* NOTE: it is important to update the host kernel signal 617 ignore state to avoid getting unexpected interrupted 618 syscalls */ 619 if (k->_sa_handler == TARGET_SIG_IGN) { 620 act1.sa_sigaction = (void *)SIG_IGN; 621 } else if (k->_sa_handler == TARGET_SIG_DFL) { 622 if (fatal_signal (sig)) 623 act1.sa_sigaction = host_signal_handler; 624 else 625 act1.sa_sigaction = (void *)SIG_DFL; 626 } else { 627 act1.sa_sigaction = host_signal_handler; 628 } 629 ret = sigaction(host_sig, &act1, NULL); 630 } 631 } 632 return ret; 633 } 634 635 static inline int copy_siginfo_to_user(target_siginfo_t *tinfo, 636 const target_siginfo_t *info) 637 { 638 tswap_siginfo(tinfo, info); 639 return 0; 640 } 641 642 static inline int current_exec_domain_sig(int sig) 643 { 644 return /* current->exec_domain && current->exec_domain->signal_invmap 645 && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig; 646 } 647 648 #if defined(TARGET_I386) && TARGET_ABI_BITS == 32 649 650 /* from the Linux kernel */ 651 652 struct target_fpreg { 653 uint16_t significand[4]; 654 uint16_t exponent; 655 }; 656 657 struct target_fpxreg { 658 uint16_t significand[4]; 659 uint16_t exponent; 660 uint16_t padding[3]; 661 }; 662 663 struct target_xmmreg { 664 abi_ulong element[4]; 665 }; 666 667 struct target_fpstate { 668 /* Regular FPU environment */ 669 abi_ulong cw; 670 abi_ulong sw; 671 abi_ulong tag; 672 abi_ulong ipoff; 673 abi_ulong cssel; 674 abi_ulong dataoff; 675 abi_ulong datasel; 676 struct target_fpreg _st[8]; 677 uint16_t status; 678 uint16_t magic; /* 0xffff = regular FPU data only */ 679 680 /* FXSR FPU environment */ 681 abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */ 682 abi_ulong mxcsr; 683 abi_ulong reserved; 684 struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ 685 struct target_xmmreg _xmm[8]; 686 abi_ulong padding[56]; 687 }; 688 689 #define X86_FXSR_MAGIC 0x0000 690 691 struct target_sigcontext { 692 uint16_t gs, __gsh; 693 uint16_t fs, __fsh; 694 uint16_t es, __esh; 695 uint16_t ds, __dsh; 696 abi_ulong edi; 697 abi_ulong esi; 698 abi_ulong ebp; 699 abi_ulong esp; 700 abi_ulong ebx; 701 abi_ulong edx; 702 abi_ulong ecx; 703 abi_ulong eax; 704 abi_ulong trapno; 705 abi_ulong err; 706 abi_ulong eip; 707 uint16_t cs, __csh; 708 abi_ulong eflags; 709 abi_ulong esp_at_signal; 710 uint16_t ss, __ssh; 711 abi_ulong fpstate; /* pointer */ 712 abi_ulong oldmask; 713 abi_ulong cr2; 714 }; 715 716 struct target_ucontext { 717 abi_ulong tuc_flags; 718 abi_ulong tuc_link; 719 target_stack_t tuc_stack; 720 struct target_sigcontext tuc_mcontext; 721 target_sigset_t tuc_sigmask; /* mask last for extensibility */ 722 }; 723 724 struct sigframe 725 { 726 abi_ulong pretcode; 727 int sig; 728 struct target_sigcontext sc; 729 struct target_fpstate fpstate; 730 abi_ulong extramask[TARGET_NSIG_WORDS-1]; 731 char retcode[8]; 732 }; 733 734 struct rt_sigframe 735 { 736 abi_ulong pretcode; 737 int sig; 738 abi_ulong pinfo; 739 abi_ulong puc; 740 struct target_siginfo info; 741 struct target_ucontext uc; 742 struct target_fpstate fpstate; 743 char retcode[8]; 744 }; 745 746 /* 747 * Set up a signal frame. 748 */ 749 750 /* XXX: save x87 state */ 751 static int 752 setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate, 753 CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr) 754 { 755 int err = 0; 756 uint16_t magic; 757 758 /* already locked in setup_frame() */ 759 err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs); 760 err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs); 761 err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es); 762 err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds); 763 err |= __put_user(env->regs[R_EDI], &sc->edi); 764 err |= __put_user(env->regs[R_ESI], &sc->esi); 765 err |= __put_user(env->regs[R_EBP], &sc->ebp); 766 err |= __put_user(env->regs[R_ESP], &sc->esp); 767 err |= __put_user(env->regs[R_EBX], &sc->ebx); 768 err |= __put_user(env->regs[R_EDX], &sc->edx); 769 err |= __put_user(env->regs[R_ECX], &sc->ecx); 770 err |= __put_user(env->regs[R_EAX], &sc->eax); 771 err |= __put_user(env->exception_index, &sc->trapno); 772 err |= __put_user(env->error_code, &sc->err); 773 err |= __put_user(env->eip, &sc->eip); 774 err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); 775 err |= __put_user(env->eflags, &sc->eflags); 776 err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal); 777 err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); 778 779 cpu_x86_fsave(env, fpstate_addr, 1); 780 fpstate->status = fpstate->sw; 781 magic = 0xffff; 782 err |= __put_user(magic, &fpstate->magic); 783 err |= __put_user(fpstate_addr, &sc->fpstate); 784 785 /* non-iBCS2 extensions.. */ 786 err |= __put_user(mask, &sc->oldmask); 787 err |= __put_user(env->cr[2], &sc->cr2); 788 return err; 789 } 790 791 /* 792 * Determine which stack to use.. 793 */ 794 795 static inline abi_ulong 796 get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size) 797 { 798 unsigned long esp; 799 800 /* Default to using normal stack */ 801 esp = env->regs[R_ESP]; 802 /* This is the X/Open sanctioned signal stack switching. */ 803 if (ka->sa_flags & TARGET_SA_ONSTACK) { 804 if (sas_ss_flags(esp) == 0) 805 esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 806 } 807 808 /* This is the legacy signal stack switching. */ 809 else 810 if ((env->segs[R_SS].selector & 0xffff) != __USER_DS && 811 !(ka->sa_flags & TARGET_SA_RESTORER) && 812 ka->sa_restorer) { 813 esp = (unsigned long) ka->sa_restorer; 814 } 815 return (esp - frame_size) & -8ul; 816 } 817 818 /* compare linux/arch/i386/kernel/signal.c:setup_frame() */ 819 static void setup_frame(int sig, struct target_sigaction *ka, 820 target_sigset_t *set, CPUX86State *env) 821 { 822 abi_ulong frame_addr; 823 struct sigframe *frame; 824 int i, err = 0; 825 826 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 827 828 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 829 goto give_sigsegv; 830 831 err |= __put_user(current_exec_domain_sig(sig), 832 &frame->sig); 833 if (err) 834 goto give_sigsegv; 835 836 setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0], 837 frame_addr + offsetof(struct sigframe, fpstate)); 838 if (err) 839 goto give_sigsegv; 840 841 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 842 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 843 goto give_sigsegv; 844 } 845 846 /* Set up to return from userspace. If provided, use a stub 847 already in userspace. */ 848 if (ka->sa_flags & TARGET_SA_RESTORER) { 849 err |= __put_user(ka->sa_restorer, &frame->pretcode); 850 } else { 851 uint16_t val16; 852 abi_ulong retcode_addr; 853 retcode_addr = frame_addr + offsetof(struct sigframe, retcode); 854 err |= __put_user(retcode_addr, &frame->pretcode); 855 /* This is popl %eax ; movl $,%eax ; int $0x80 */ 856 val16 = 0xb858; 857 err |= __put_user(val16, (uint16_t *)(frame->retcode+0)); 858 err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); 859 val16 = 0x80cd; 860 err |= __put_user(val16, (uint16_t *)(frame->retcode+6)); 861 } 862 863 if (err) 864 goto give_sigsegv; 865 866 /* Set up registers for signal handler */ 867 env->regs[R_ESP] = frame_addr; 868 env->eip = ka->_sa_handler; 869 870 cpu_x86_load_seg(env, R_DS, __USER_DS); 871 cpu_x86_load_seg(env, R_ES, __USER_DS); 872 cpu_x86_load_seg(env, R_SS, __USER_DS); 873 cpu_x86_load_seg(env, R_CS, __USER_CS); 874 env->eflags &= ~TF_MASK; 875 876 unlock_user_struct(frame, frame_addr, 1); 877 878 return; 879 880 give_sigsegv: 881 unlock_user_struct(frame, frame_addr, 1); 882 if (sig == TARGET_SIGSEGV) 883 ka->_sa_handler = TARGET_SIG_DFL; 884 force_sig(TARGET_SIGSEGV /* , current */); 885 } 886 887 /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */ 888 static void setup_rt_frame(int sig, struct target_sigaction *ka, 889 target_siginfo_t *info, 890 target_sigset_t *set, CPUX86State *env) 891 { 892 abi_ulong frame_addr, addr; 893 struct rt_sigframe *frame; 894 int i, err = 0; 895 896 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 897 898 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 899 goto give_sigsegv; 900 901 err |= __put_user(current_exec_domain_sig(sig), 902 &frame->sig); 903 addr = frame_addr + offsetof(struct rt_sigframe, info); 904 err |= __put_user(addr, &frame->pinfo); 905 addr = frame_addr + offsetof(struct rt_sigframe, uc); 906 err |= __put_user(addr, &frame->puc); 907 err |= copy_siginfo_to_user(&frame->info, info); 908 if (err) 909 goto give_sigsegv; 910 911 /* Create the ucontext. */ 912 err |= __put_user(0, &frame->uc.tuc_flags); 913 err |= __put_user(0, &frame->uc.tuc_link); 914 err |= __put_user(target_sigaltstack_used.ss_sp, 915 &frame->uc.tuc_stack.ss_sp); 916 err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)), 917 &frame->uc.tuc_stack.ss_flags); 918 err |= __put_user(target_sigaltstack_used.ss_size, 919 &frame->uc.tuc_stack.ss_size); 920 err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, 921 env, set->sig[0], 922 frame_addr + offsetof(struct rt_sigframe, fpstate)); 923 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 924 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) 925 goto give_sigsegv; 926 } 927 928 /* Set up to return from userspace. If provided, use a stub 929 already in userspace. */ 930 if (ka->sa_flags & TARGET_SA_RESTORER) { 931 err |= __put_user(ka->sa_restorer, &frame->pretcode); 932 } else { 933 uint16_t val16; 934 addr = frame_addr + offsetof(struct rt_sigframe, retcode); 935 err |= __put_user(addr, &frame->pretcode); 936 /* This is movl $,%eax ; int $0x80 */ 937 err |= __put_user(0xb8, (char *)(frame->retcode+0)); 938 err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); 939 val16 = 0x80cd; 940 err |= __put_user(val16, (uint16_t *)(frame->retcode+5)); 941 } 942 943 if (err) 944 goto give_sigsegv; 945 946 /* Set up registers for signal handler */ 947 env->regs[R_ESP] = frame_addr; 948 env->eip = ka->_sa_handler; 949 950 cpu_x86_load_seg(env, R_DS, __USER_DS); 951 cpu_x86_load_seg(env, R_ES, __USER_DS); 952 cpu_x86_load_seg(env, R_SS, __USER_DS); 953 cpu_x86_load_seg(env, R_CS, __USER_CS); 954 env->eflags &= ~TF_MASK; 955 956 unlock_user_struct(frame, frame_addr, 1); 957 958 return; 959 960 give_sigsegv: 961 unlock_user_struct(frame, frame_addr, 1); 962 if (sig == TARGET_SIGSEGV) 963 ka->_sa_handler = TARGET_SIG_DFL; 964 force_sig(TARGET_SIGSEGV /* , current */); 965 } 966 967 static int 968 restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax) 969 { 970 unsigned int err = 0; 971 abi_ulong fpstate_addr; 972 unsigned int tmpflags; 973 974 cpu_x86_load_seg(env, R_GS, tswap16(sc->gs)); 975 cpu_x86_load_seg(env, R_FS, tswap16(sc->fs)); 976 cpu_x86_load_seg(env, R_ES, tswap16(sc->es)); 977 cpu_x86_load_seg(env, R_DS, tswap16(sc->ds)); 978 979 env->regs[R_EDI] = tswapl(sc->edi); 980 env->regs[R_ESI] = tswapl(sc->esi); 981 env->regs[R_EBP] = tswapl(sc->ebp); 982 env->regs[R_ESP] = tswapl(sc->esp); 983 env->regs[R_EBX] = tswapl(sc->ebx); 984 env->regs[R_EDX] = tswapl(sc->edx); 985 env->regs[R_ECX] = tswapl(sc->ecx); 986 env->eip = tswapl(sc->eip); 987 988 cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3); 989 cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3); 990 991 tmpflags = tswapl(sc->eflags); 992 env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5); 993 // regs->orig_eax = -1; /* disable syscall checks */ 994 995 fpstate_addr = tswapl(sc->fpstate); 996 if (fpstate_addr != 0) { 997 if (!access_ok(VERIFY_READ, fpstate_addr, 998 sizeof(struct target_fpstate))) 999 goto badframe; 1000 cpu_x86_frstor(env, fpstate_addr, 1); 1001 } 1002 1003 *peax = tswapl(sc->eax); 1004 return err; 1005 badframe: 1006 return 1; 1007 } 1008 1009 long do_sigreturn(CPUX86State *env) 1010 { 1011 struct sigframe *frame; 1012 abi_ulong frame_addr = env->regs[R_ESP] - 8; 1013 target_sigset_t target_set; 1014 sigset_t set; 1015 int eax, i; 1016 1017 #if defined(DEBUG_SIGNAL) 1018 fprintf(stderr, "do_sigreturn\n"); 1019 #endif 1020 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1021 goto badframe; 1022 /* set blocked signals */ 1023 if (__get_user(target_set.sig[0], &frame->sc.oldmask)) 1024 goto badframe; 1025 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 1026 if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) 1027 goto badframe; 1028 } 1029 1030 target_to_host_sigset_internal(&set, &target_set); 1031 sigprocmask(SIG_SETMASK, &set, NULL); 1032 1033 /* restore registers */ 1034 if (restore_sigcontext(env, &frame->sc, &eax)) 1035 goto badframe; 1036 unlock_user_struct(frame, frame_addr, 0); 1037 return eax; 1038 1039 badframe: 1040 unlock_user_struct(frame, frame_addr, 0); 1041 force_sig(TARGET_SIGSEGV); 1042 return 0; 1043 } 1044 1045 long do_rt_sigreturn(CPUX86State *env) 1046 { 1047 abi_ulong frame_addr; 1048 struct rt_sigframe *frame; 1049 sigset_t set; 1050 int eax; 1051 1052 frame_addr = env->regs[R_ESP] - 4; 1053 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1054 goto badframe; 1055 target_to_host_sigset(&set, &frame->uc.tuc_sigmask); 1056 sigprocmask(SIG_SETMASK, &set, NULL); 1057 1058 if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax)) 1059 goto badframe; 1060 1061 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, 1062 get_sp_from_cpustate(env)) == -EFAULT) 1063 goto badframe; 1064 1065 unlock_user_struct(frame, frame_addr, 0); 1066 return eax; 1067 1068 badframe: 1069 unlock_user_struct(frame, frame_addr, 0); 1070 force_sig(TARGET_SIGSEGV); 1071 return 0; 1072 } 1073 1074 #elif defined(TARGET_ARM) 1075 1076 struct target_sigcontext { 1077 abi_ulong trap_no; 1078 abi_ulong error_code; 1079 abi_ulong oldmask; 1080 abi_ulong arm_r0; 1081 abi_ulong arm_r1; 1082 abi_ulong arm_r2; 1083 abi_ulong arm_r3; 1084 abi_ulong arm_r4; 1085 abi_ulong arm_r5; 1086 abi_ulong arm_r6; 1087 abi_ulong arm_r7; 1088 abi_ulong arm_r8; 1089 abi_ulong arm_r9; 1090 abi_ulong arm_r10; 1091 abi_ulong arm_fp; 1092 abi_ulong arm_ip; 1093 abi_ulong arm_sp; 1094 abi_ulong arm_lr; 1095 abi_ulong arm_pc; 1096 abi_ulong arm_cpsr; 1097 abi_ulong fault_address; 1098 }; 1099 1100 struct target_ucontext_v1 { 1101 abi_ulong tuc_flags; 1102 abi_ulong tuc_link; 1103 target_stack_t tuc_stack; 1104 struct target_sigcontext tuc_mcontext; 1105 target_sigset_t tuc_sigmask; /* mask last for extensibility */ 1106 }; 1107 1108 struct target_ucontext_v2 { 1109 abi_ulong tuc_flags; 1110 abi_ulong tuc_link; 1111 target_stack_t tuc_stack; 1112 struct target_sigcontext tuc_mcontext; 1113 target_sigset_t tuc_sigmask; /* mask last for extensibility */ 1114 char __unused[128 - sizeof(sigset_t)]; 1115 abi_ulong tuc_regspace[128] __attribute__((__aligned__(8))); 1116 }; 1117 1118 struct sigframe_v1 1119 { 1120 struct target_sigcontext sc; 1121 abi_ulong extramask[TARGET_NSIG_WORDS-1]; 1122 abi_ulong retcode; 1123 }; 1124 1125 struct sigframe_v2 1126 { 1127 struct target_ucontext_v2 uc; 1128 abi_ulong retcode; 1129 }; 1130 1131 struct rt_sigframe_v1 1132 { 1133 abi_ulong pinfo; 1134 abi_ulong puc; 1135 struct target_siginfo info; 1136 struct target_ucontext_v1 uc; 1137 abi_ulong retcode; 1138 }; 1139 1140 struct rt_sigframe_v2 1141 { 1142 struct target_siginfo info; 1143 struct target_ucontext_v2 uc; 1144 abi_ulong retcode; 1145 }; 1146 1147 #define TARGET_CONFIG_CPU_32 1 1148 1149 /* 1150 * For ARM syscalls, we encode the syscall number into the instruction. 1151 */ 1152 #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) 1153 #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) 1154 1155 /* 1156 * For Thumb syscalls, we pass the syscall number via r7. We therefore 1157 * need two 16-bit instructions. 1158 */ 1159 #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) 1160 #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) 1161 1162 static const abi_ulong retcodes[4] = { 1163 SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, 1164 SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN 1165 }; 1166 1167 1168 #define __get_user_error(x,p,e) __get_user(x, p) 1169 1170 static inline int valid_user_regs(CPUState *regs) 1171 { 1172 return 1; 1173 } 1174 1175 static void 1176 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ 1177 CPUState *env, abi_ulong mask) 1178 { 1179 __put_user(env->regs[0], &sc->arm_r0); 1180 __put_user(env->regs[1], &sc->arm_r1); 1181 __put_user(env->regs[2], &sc->arm_r2); 1182 __put_user(env->regs[3], &sc->arm_r3); 1183 __put_user(env->regs[4], &sc->arm_r4); 1184 __put_user(env->regs[5], &sc->arm_r5); 1185 __put_user(env->regs[6], &sc->arm_r6); 1186 __put_user(env->regs[7], &sc->arm_r7); 1187 __put_user(env->regs[8], &sc->arm_r8); 1188 __put_user(env->regs[9], &sc->arm_r9); 1189 __put_user(env->regs[10], &sc->arm_r10); 1190 __put_user(env->regs[11], &sc->arm_fp); 1191 __put_user(env->regs[12], &sc->arm_ip); 1192 __put_user(env->regs[13], &sc->arm_sp); 1193 __put_user(env->regs[14], &sc->arm_lr); 1194 __put_user(env->regs[15], &sc->arm_pc); 1195 #ifdef TARGET_CONFIG_CPU_32 1196 __put_user(cpsr_read(env), &sc->arm_cpsr); 1197 #endif 1198 1199 __put_user(/* current->thread.trap_no */ 0, &sc->trap_no); 1200 __put_user(/* current->thread.error_code */ 0, &sc->error_code); 1201 __put_user(/* current->thread.address */ 0, &sc->fault_address); 1202 __put_user(mask, &sc->oldmask); 1203 } 1204 1205 static inline abi_ulong 1206 get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize) 1207 { 1208 unsigned long sp = regs->regs[13]; 1209 1210 /* 1211 * This is the X/Open sanctioned signal stack switching. 1212 */ 1213 if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) 1214 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 1215 /* 1216 * ATPCS B01 mandates 8-byte alignment 1217 */ 1218 return (sp - framesize) & ~7; 1219 } 1220 1221 static int 1222 setup_return(CPUState *env, struct target_sigaction *ka, 1223 abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr) 1224 { 1225 abi_ulong handler = ka->_sa_handler; 1226 abi_ulong retcode; 1227 int thumb = handler & 1; 1228 1229 if (ka->sa_flags & TARGET_SA_RESTORER) { 1230 retcode = ka->sa_restorer; 1231 } else { 1232 unsigned int idx = thumb; 1233 1234 if (ka->sa_flags & TARGET_SA_SIGINFO) 1235 idx += 2; 1236 1237 if (__put_user(retcodes[idx], rc)) 1238 return 1; 1239 #if 0 1240 flush_icache_range((abi_ulong)rc, 1241 (abi_ulong)(rc + 1)); 1242 #endif 1243 retcode = rc_addr + thumb; 1244 } 1245 1246 env->regs[0] = usig; 1247 env->regs[13] = frame_addr; 1248 env->regs[14] = retcode; 1249 env->regs[15] = handler & (thumb ? ~1 : ~3); 1250 env->thumb = thumb; 1251 1252 #if 0 1253 #ifdef TARGET_CONFIG_CPU_32 1254 env->cpsr = cpsr; 1255 #endif 1256 #endif 1257 1258 return 0; 1259 } 1260 1261 static void setup_sigframe_v2(struct target_ucontext_v2 *uc, 1262 target_sigset_t *set, CPUState *env) 1263 { 1264 struct target_sigaltstack stack; 1265 int i; 1266 1267 /* Clear all the bits of the ucontext we don't use. */ 1268 memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); 1269 1270 memset(&stack, 0, sizeof(stack)); 1271 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); 1272 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); 1273 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); 1274 memcpy(&uc->tuc_stack, &stack, sizeof(stack)); 1275 1276 setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]); 1277 /* FIXME: Save coprocessor signal frame. */ 1278 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 1279 __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]); 1280 } 1281 } 1282 1283 /* compare linux/arch/arm/kernel/signal.c:setup_frame() */ 1284 static void setup_frame_v1(int usig, struct target_sigaction *ka, 1285 target_sigset_t *set, CPUState *regs) 1286 { 1287 struct sigframe_v1 *frame; 1288 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); 1289 int i; 1290 1291 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 1292 return; 1293 1294 setup_sigcontext(&frame->sc, regs, set->sig[0]); 1295 1296 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 1297 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 1298 goto end; 1299 } 1300 1301 setup_return(regs, ka, &frame->retcode, frame_addr, usig, 1302 frame_addr + offsetof(struct sigframe_v1, retcode)); 1303 1304 end: 1305 unlock_user_struct(frame, frame_addr, 1); 1306 } 1307 1308 static void setup_frame_v2(int usig, struct target_sigaction *ka, 1309 target_sigset_t *set, CPUState *regs) 1310 { 1311 struct sigframe_v2 *frame; 1312 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); 1313 1314 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 1315 return; 1316 1317 setup_sigframe_v2(&frame->uc, set, regs); 1318 1319 setup_return(regs, ka, &frame->retcode, frame_addr, usig, 1320 frame_addr + offsetof(struct sigframe_v2, retcode)); 1321 1322 unlock_user_struct(frame, frame_addr, 1); 1323 } 1324 1325 static void setup_frame(int usig, struct target_sigaction *ka, 1326 target_sigset_t *set, CPUState *regs) 1327 { 1328 if (get_osversion() >= 0x020612) { 1329 setup_frame_v2(usig, ka, set, regs); 1330 } else { 1331 setup_frame_v1(usig, ka, set, regs); 1332 } 1333 } 1334 1335 /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */ 1336 static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, 1337 target_siginfo_t *info, 1338 target_sigset_t *set, CPUState *env) 1339 { 1340 struct rt_sigframe_v1 *frame; 1341 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); 1342 struct target_sigaltstack stack; 1343 int i; 1344 abi_ulong info_addr, uc_addr; 1345 1346 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 1347 return /* 1 */; 1348 1349 info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info); 1350 __put_user(info_addr, &frame->pinfo); 1351 uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc); 1352 __put_user(uc_addr, &frame->puc); 1353 copy_siginfo_to_user(&frame->info, info); 1354 1355 /* Clear all the bits of the ucontext we don't use. */ 1356 memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext)); 1357 1358 memset(&stack, 0, sizeof(stack)); 1359 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); 1360 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); 1361 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); 1362 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack)); 1363 1364 setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]); 1365 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 1366 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) 1367 goto end; 1368 } 1369 1370 setup_return(env, ka, &frame->retcode, frame_addr, usig, 1371 frame_addr + offsetof(struct rt_sigframe_v1, retcode)); 1372 1373 env->regs[1] = info_addr; 1374 env->regs[2] = uc_addr; 1375 1376 end: 1377 unlock_user_struct(frame, frame_addr, 1); 1378 } 1379 1380 static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, 1381 target_siginfo_t *info, 1382 target_sigset_t *set, CPUState *env) 1383 { 1384 struct rt_sigframe_v2 *frame; 1385 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); 1386 abi_ulong info_addr, uc_addr; 1387 1388 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 1389 return /* 1 */; 1390 1391 info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info); 1392 uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc); 1393 copy_siginfo_to_user(&frame->info, info); 1394 1395 setup_sigframe_v2(&frame->uc, set, env); 1396 1397 setup_return(env, ka, &frame->retcode, frame_addr, usig, 1398 frame_addr + offsetof(struct rt_sigframe_v2, retcode)); 1399 1400 env->regs[1] = info_addr; 1401 env->regs[2] = uc_addr; 1402 1403 unlock_user_struct(frame, frame_addr, 1); 1404 } 1405 1406 static void setup_rt_frame(int usig, struct target_sigaction *ka, 1407 target_siginfo_t *info, 1408 target_sigset_t *set, CPUState *env) 1409 { 1410 if (get_osversion() >= 0x020612) { 1411 setup_rt_frame_v2(usig, ka, info, set, env); 1412 } else { 1413 setup_rt_frame_v1(usig, ka, info, set, env); 1414 } 1415 } 1416 1417 static int 1418 restore_sigcontext(CPUState *env, struct target_sigcontext *sc) 1419 { 1420 int err = 0; 1421 uint32_t cpsr; 1422 1423 __get_user_error(env->regs[0], &sc->arm_r0, err); 1424 __get_user_error(env->regs[1], &sc->arm_r1, err); 1425 __get_user_error(env->regs[2], &sc->arm_r2, err); 1426 __get_user_error(env->regs[3], &sc->arm_r3, err); 1427 __get_user_error(env->regs[4], &sc->arm_r4, err); 1428 __get_user_error(env->regs[5], &sc->arm_r5, err); 1429 __get_user_error(env->regs[6], &sc->arm_r6, err); 1430 __get_user_error(env->regs[7], &sc->arm_r7, err); 1431 __get_user_error(env->regs[8], &sc->arm_r8, err); 1432 __get_user_error(env->regs[9], &sc->arm_r9, err); 1433 __get_user_error(env->regs[10], &sc->arm_r10, err); 1434 __get_user_error(env->regs[11], &sc->arm_fp, err); 1435 __get_user_error(env->regs[12], &sc->arm_ip, err); 1436 __get_user_error(env->regs[13], &sc->arm_sp, err); 1437 __get_user_error(env->regs[14], &sc->arm_lr, err); 1438 __get_user_error(env->regs[15], &sc->arm_pc, err); 1439 #ifdef TARGET_CONFIG_CPU_32 1440 __get_user_error(cpsr, &sc->arm_cpsr, err); 1441 cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC); 1442 #endif 1443 1444 err |= !valid_user_regs(env); 1445 1446 return err; 1447 } 1448 1449 static long do_sigreturn_v1(CPUState *env) 1450 { 1451 abi_ulong frame_addr; 1452 struct sigframe_v1 *frame; 1453 target_sigset_t set; 1454 sigset_t host_set; 1455 int i; 1456 1457 /* 1458 * Since we stacked the signal on a 64-bit boundary, 1459 * then 'sp' should be word aligned here. If it's 1460 * not, then the user is trying to mess with us. 1461 */ 1462 if (env->regs[13] & 7) 1463 goto badframe; 1464 1465 frame_addr = env->regs[13]; 1466 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1467 goto badframe; 1468 1469 if (__get_user(set.sig[0], &frame->sc.oldmask)) 1470 goto badframe; 1471 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 1472 if (__get_user(set.sig[i], &frame->extramask[i - 1])) 1473 goto badframe; 1474 } 1475 1476 target_to_host_sigset_internal(&host_set, &set); 1477 sigprocmask(SIG_SETMASK, &host_set, NULL); 1478 1479 if (restore_sigcontext(env, &frame->sc)) 1480 goto badframe; 1481 1482 #if 0 1483 /* Send SIGTRAP if we're single-stepping */ 1484 if (ptrace_cancel_bpt(current)) 1485 send_sig(SIGTRAP, current, 1); 1486 #endif 1487 unlock_user_struct(frame, frame_addr, 0); 1488 return env->regs[0]; 1489 1490 badframe: 1491 unlock_user_struct(frame, frame_addr, 0); 1492 force_sig(SIGSEGV /* , current */); 1493 return 0; 1494 } 1495 1496 static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr, 1497 struct target_ucontext_v2 *uc) 1498 { 1499 sigset_t host_set; 1500 1501 target_to_host_sigset(&host_set, &uc->tuc_sigmask); 1502 sigprocmask(SIG_SETMASK, &host_set, NULL); 1503 1504 if (restore_sigcontext(env, &uc->tuc_mcontext)) 1505 return 1; 1506 1507 if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) 1508 return 1; 1509 1510 #if 0 1511 /* Send SIGTRAP if we're single-stepping */ 1512 if (ptrace_cancel_bpt(current)) 1513 send_sig(SIGTRAP, current, 1); 1514 #endif 1515 1516 return 0; 1517 } 1518 1519 static long do_sigreturn_v2(CPUState *env) 1520 { 1521 abi_ulong frame_addr; 1522 struct sigframe_v2 *frame; 1523 1524 /* 1525 * Since we stacked the signal on a 64-bit boundary, 1526 * then 'sp' should be word aligned here. If it's 1527 * not, then the user is trying to mess with us. 1528 */ 1529 if (env->regs[13] & 7) 1530 goto badframe; 1531 1532 frame_addr = env->regs[13]; 1533 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1534 goto badframe; 1535 1536 if (do_sigframe_return_v2(env, frame_addr, &frame->uc)) 1537 goto badframe; 1538 1539 unlock_user_struct(frame, frame_addr, 0); 1540 return env->regs[0]; 1541 1542 badframe: 1543 unlock_user_struct(frame, frame_addr, 0); 1544 force_sig(SIGSEGV /* , current */); 1545 return 0; 1546 } 1547 1548 long do_sigreturn(CPUState *env) 1549 { 1550 if (get_osversion() >= 0x020612) { 1551 return do_sigreturn_v2(env); 1552 } else { 1553 return do_sigreturn_v1(env); 1554 } 1555 } 1556 1557 static long do_rt_sigreturn_v1(CPUState *env) 1558 { 1559 abi_ulong frame_addr; 1560 struct rt_sigframe_v1 *frame; 1561 sigset_t host_set; 1562 1563 /* 1564 * Since we stacked the signal on a 64-bit boundary, 1565 * then 'sp' should be word aligned here. If it's 1566 * not, then the user is trying to mess with us. 1567 */ 1568 if (env->regs[13] & 7) 1569 goto badframe; 1570 1571 frame_addr = env->regs[13]; 1572 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1573 goto badframe; 1574 1575 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); 1576 sigprocmask(SIG_SETMASK, &host_set, NULL); 1577 1578 if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) 1579 goto badframe; 1580 1581 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) 1582 goto badframe; 1583 1584 #if 0 1585 /* Send SIGTRAP if we're single-stepping */ 1586 if (ptrace_cancel_bpt(current)) 1587 send_sig(SIGTRAP, current, 1); 1588 #endif 1589 unlock_user_struct(frame, frame_addr, 0); 1590 return env->regs[0]; 1591 1592 badframe: 1593 unlock_user_struct(frame, frame_addr, 0); 1594 force_sig(SIGSEGV /* , current */); 1595 return 0; 1596 } 1597 1598 static long do_rt_sigreturn_v2(CPUState *env) 1599 { 1600 abi_ulong frame_addr; 1601 struct rt_sigframe_v2 *frame; 1602 1603 /* 1604 * Since we stacked the signal on a 64-bit boundary, 1605 * then 'sp' should be word aligned here. If it's 1606 * not, then the user is trying to mess with us. 1607 */ 1608 if (env->regs[13] & 7) 1609 goto badframe; 1610 1611 frame_addr = env->regs[13]; 1612 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 1613 goto badframe; 1614 1615 if (do_sigframe_return_v2(env, frame_addr, &frame->uc)) 1616 goto badframe; 1617 1618 unlock_user_struct(frame, frame_addr, 0); 1619 return env->regs[0]; 1620 1621 badframe: 1622 unlock_user_struct(frame, frame_addr, 0); 1623 force_sig(SIGSEGV /* , current */); 1624 return 0; 1625 } 1626 1627 long do_rt_sigreturn(CPUState *env) 1628 { 1629 if (get_osversion() >= 0x020612) { 1630 return do_rt_sigreturn_v2(env); 1631 } else { 1632 return do_rt_sigreturn_v1(env); 1633 } 1634 } 1635 1636 #elif defined(TARGET_SPARC) 1637 1638 #define __SUNOS_MAXWIN 31 1639 1640 /* This is what SunOS does, so shall I. */ 1641 struct target_sigcontext { 1642 abi_ulong sigc_onstack; /* state to restore */ 1643 1644 abi_ulong sigc_mask; /* sigmask to restore */ 1645 abi_ulong sigc_sp; /* stack pointer */ 1646 abi_ulong sigc_pc; /* program counter */ 1647 abi_ulong sigc_npc; /* next program counter */ 1648 abi_ulong sigc_psr; /* for condition codes etc */ 1649 abi_ulong sigc_g1; /* User uses these two registers */ 1650 abi_ulong sigc_o0; /* within the trampoline code. */ 1651 1652 /* Now comes information regarding the users window set 1653 * at the time of the signal. 1654 */ 1655 abi_ulong sigc_oswins; /* outstanding windows */ 1656 1657 /* stack ptrs for each regwin buf */ 1658 char *sigc_spbuf[__SUNOS_MAXWIN]; 1659 1660 /* Windows to restore after signal */ 1661 struct { 1662 abi_ulong locals[8]; 1663 abi_ulong ins[8]; 1664 } sigc_wbuf[__SUNOS_MAXWIN]; 1665 }; 1666 /* A Sparc stack frame */ 1667 struct sparc_stackf { 1668 abi_ulong locals[8]; 1669 abi_ulong ins[6]; 1670 struct sparc_stackf *fp; 1671 abi_ulong callers_pc; 1672 char *structptr; 1673 abi_ulong xargs[6]; 1674 abi_ulong xxargs[1]; 1675 }; 1676 1677 typedef struct { 1678 struct { 1679 abi_ulong psr; 1680 abi_ulong pc; 1681 abi_ulong npc; 1682 abi_ulong y; 1683 abi_ulong u_regs[16]; /* globals and ins */ 1684 } si_regs; 1685 int si_mask; 1686 } __siginfo_t; 1687 1688 typedef struct { 1689 unsigned long si_float_regs [32]; 1690 unsigned long si_fsr; 1691 unsigned long si_fpqdepth; 1692 struct { 1693 unsigned long *insn_addr; 1694 unsigned long insn; 1695 } si_fpqueue [16]; 1696 } qemu_siginfo_fpu_t; 1697 1698 1699 struct target_signal_frame { 1700 struct sparc_stackf ss; 1701 __siginfo_t info; 1702 abi_ulong fpu_save; 1703 abi_ulong insns[2] __attribute__ ((aligned (8))); 1704 abi_ulong extramask[TARGET_NSIG_WORDS - 1]; 1705 abi_ulong extra_size; /* Should be 0 */ 1706 qemu_siginfo_fpu_t fpu_state; 1707 }; 1708 struct target_rt_signal_frame { 1709 struct sparc_stackf ss; 1710 siginfo_t info; 1711 abi_ulong regs[20]; 1712 sigset_t mask; 1713 abi_ulong fpu_save; 1714 unsigned int insns[2]; 1715 stack_t stack; 1716 unsigned int extra_size; /* Should be 0 */ 1717 qemu_siginfo_fpu_t fpu_state; 1718 }; 1719 1720 #define UREG_O0 16 1721 #define UREG_O6 22 1722 #define UREG_I0 0 1723 #define UREG_I1 1 1724 #define UREG_I2 2 1725 #define UREG_I3 3 1726 #define UREG_I4 4 1727 #define UREG_I5 5 1728 #define UREG_I6 6 1729 #define UREG_I7 7 1730 #define UREG_L0 8 1731 #define UREG_FP UREG_I6 1732 #define UREG_SP UREG_O6 1733 1734 static inline abi_ulong get_sigframe(struct target_sigaction *sa, 1735 CPUState *env, unsigned long framesize) 1736 { 1737 abi_ulong sp; 1738 1739 sp = env->regwptr[UREG_FP]; 1740 1741 /* This is the X/Open sanctioned signal stack switching. */ 1742 if (sa->sa_flags & TARGET_SA_ONSTACK) { 1743 if (!on_sig_stack(sp) 1744 && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7)) 1745 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 1746 } 1747 return sp - framesize; 1748 } 1749 1750 static int 1751 setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask) 1752 { 1753 int err = 0, i; 1754 1755 err |= __put_user(env->psr, &si->si_regs.psr); 1756 err |= __put_user(env->pc, &si->si_regs.pc); 1757 err |= __put_user(env->npc, &si->si_regs.npc); 1758 err |= __put_user(env->y, &si->si_regs.y); 1759 for (i=0; i < 8; i++) { 1760 err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]); 1761 } 1762 for (i=0; i < 8; i++) { 1763 err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]); 1764 } 1765 err |= __put_user(mask, &si->si_mask); 1766 return err; 1767 } 1768 1769 #if 0 1770 static int 1771 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ 1772 CPUState *env, unsigned long mask) 1773 { 1774 int err = 0; 1775 1776 err |= __put_user(mask, &sc->sigc_mask); 1777 err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp); 1778 err |= __put_user(env->pc, &sc->sigc_pc); 1779 err |= __put_user(env->npc, &sc->sigc_npc); 1780 err |= __put_user(env->psr, &sc->sigc_psr); 1781 err |= __put_user(env->gregs[1], &sc->sigc_g1); 1782 err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0); 1783 1784 return err; 1785 } 1786 #endif 1787 #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) 1788 1789 static void setup_frame(int sig, struct target_sigaction *ka, 1790 target_sigset_t *set, CPUState *env) 1791 { 1792 abi_ulong sf_addr; 1793 struct target_signal_frame *sf; 1794 int sigframe_size, err, i; 1795 1796 /* 1. Make sure everything is clean */ 1797 //synchronize_user_stack(); 1798 1799 sigframe_size = NF_ALIGNEDSZ; 1800 sf_addr = get_sigframe(ka, env, sigframe_size); 1801 1802 sf = lock_user(VERIFY_WRITE, sf_addr, 1803 sizeof(struct target_signal_frame), 0); 1804 if (!sf) 1805 goto sigsegv; 1806 1807 //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]); 1808 #if 0 1809 if (invalid_frame_pointer(sf, sigframe_size)) 1810 goto sigill_and_return; 1811 #endif 1812 /* 2. Save the current process state */ 1813 err = setup___siginfo(&sf->info, env, set->sig[0]); 1814 err |= __put_user(0, &sf->extra_size); 1815 1816 //err |= save_fpu_state(regs, &sf->fpu_state); 1817 //err |= __put_user(&sf->fpu_state, &sf->fpu_save); 1818 1819 err |= __put_user(set->sig[0], &sf->info.si_mask); 1820 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { 1821 err |= __put_user(set->sig[i + 1], &sf->extramask[i]); 1822 } 1823 1824 for (i = 0; i < 8; i++) { 1825 err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); 1826 } 1827 for (i = 0; i < 8; i++) { 1828 err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); 1829 } 1830 if (err) 1831 goto sigsegv; 1832 1833 /* 3. signal handler back-trampoline and parameters */ 1834 env->regwptr[UREG_FP] = sf_addr; 1835 env->regwptr[UREG_I0] = sig; 1836 env->regwptr[UREG_I1] = sf_addr + 1837 offsetof(struct target_signal_frame, info); 1838 env->regwptr[UREG_I2] = sf_addr + 1839 offsetof(struct target_signal_frame, info); 1840 1841 /* 4. signal handler */ 1842 env->pc = ka->_sa_handler; 1843 env->npc = (env->pc + 4); 1844 /* 5. return to kernel instructions */ 1845 if (ka->sa_restorer) 1846 env->regwptr[UREG_I7] = ka->sa_restorer; 1847 else { 1848 uint32_t val32; 1849 1850 env->regwptr[UREG_I7] = sf_addr + 1851 offsetof(struct target_signal_frame, insns) - 2 * 4; 1852 1853 /* mov __NR_sigreturn, %g1 */ 1854 val32 = 0x821020d8; 1855 err |= __put_user(val32, &sf->insns[0]); 1856 1857 /* t 0x10 */ 1858 val32 = 0x91d02010; 1859 err |= __put_user(val32, &sf->insns[1]); 1860 if (err) 1861 goto sigsegv; 1862 1863 /* Flush instruction space. */ 1864 //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0])); 1865 // tb_flush(env); 1866 } 1867 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); 1868 return; 1869 #if 0 1870 sigill_and_return: 1871 force_sig(TARGET_SIGILL); 1872 #endif 1873 sigsegv: 1874 //fprintf(stderr, "force_sig\n"); 1875 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); 1876 force_sig(TARGET_SIGSEGV); 1877 } 1878 static inline int 1879 restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu) 1880 { 1881 int err; 1882 #if 0 1883 #ifdef CONFIG_SMP 1884 if (current->flags & PF_USEDFPU) 1885 regs->psr &= ~PSR_EF; 1886 #else 1887 if (current == last_task_used_math) { 1888 last_task_used_math = 0; 1889 regs->psr &= ~PSR_EF; 1890 } 1891 #endif 1892 current->used_math = 1; 1893 current->flags &= ~PF_USEDFPU; 1894 #endif 1895 #if 0 1896 if (verify_area (VERIFY_READ, fpu, sizeof(*fpu))) 1897 return -EFAULT; 1898 #endif 1899 1900 #if 0 1901 /* XXX: incorrect */ 1902 err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0], 1903 (sizeof(unsigned long) * 32)); 1904 #endif 1905 err |= __get_user(env->fsr, &fpu->si_fsr); 1906 #if 0 1907 err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth); 1908 if (current->thread.fpqdepth != 0) 1909 err |= __copy_from_user(¤t->thread.fpqueue[0], 1910 &fpu->si_fpqueue[0], 1911 ((sizeof(unsigned long) + 1912 (sizeof(unsigned long *)))*16)); 1913 #endif 1914 return err; 1915 } 1916 1917 1918 static void setup_rt_frame(int sig, struct target_sigaction *ka, 1919 target_siginfo_t *info, 1920 target_sigset_t *set, CPUState *env) 1921 { 1922 fprintf(stderr, "setup_rt_frame: not implemented\n"); 1923 } 1924 1925 long do_sigreturn(CPUState *env) 1926 { 1927 abi_ulong sf_addr; 1928 struct target_signal_frame *sf; 1929 uint32_t up_psr, pc, npc; 1930 target_sigset_t set; 1931 sigset_t host_set; 1932 abi_ulong fpu_save_addr; 1933 int err, i; 1934 1935 sf_addr = env->regwptr[UREG_FP]; 1936 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) 1937 goto segv_and_exit; 1938 #if 0 1939 fprintf(stderr, "sigreturn\n"); 1940 fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]); 1941 #endif 1942 //cpu_dump_state(env, stderr, fprintf, 0); 1943 1944 /* 1. Make sure we are not getting garbage from the user */ 1945 1946 if (sf_addr & 3) 1947 goto segv_and_exit; 1948 1949 err = __get_user(pc, &sf->info.si_regs.pc); 1950 err |= __get_user(npc, &sf->info.si_regs.npc); 1951 1952 if ((pc | npc) & 3) 1953 goto segv_and_exit; 1954 1955 /* 2. Restore the state */ 1956 err |= __get_user(up_psr, &sf->info.si_regs.psr); 1957 1958 /* User can only change condition codes and FPU enabling in %psr. */ 1959 env->psr = (up_psr & (PSR_ICC /* | PSR_EF */)) 1960 | (env->psr & ~(PSR_ICC /* | PSR_EF */)); 1961 1962 env->pc = pc; 1963 env->npc = npc; 1964 err |= __get_user(env->y, &sf->info.si_regs.y); 1965 for (i=0; i < 8; i++) { 1966 err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); 1967 } 1968 for (i=0; i < 8; i++) { 1969 err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]); 1970 } 1971 1972 err |= __get_user(fpu_save_addr, &sf->fpu_save); 1973 1974 //if (fpu_save) 1975 // err |= restore_fpu_state(env, fpu_save); 1976 1977 /* This is pretty much atomic, no amount locking would prevent 1978 * the races which exist anyways. 1979 */ 1980 err |= __get_user(set.sig[0], &sf->info.si_mask); 1981 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 1982 err |= (__get_user(set.sig[i], &sf->extramask[i - 1])); 1983 } 1984 1985 target_to_host_sigset_internal(&host_set, &set); 1986 sigprocmask(SIG_SETMASK, &host_set, NULL); 1987 1988 if (err) 1989 goto segv_and_exit; 1990 unlock_user_struct(sf, sf_addr, 0); 1991 return env->regwptr[0]; 1992 1993 segv_and_exit: 1994 unlock_user_struct(sf, sf_addr, 0); 1995 force_sig(TARGET_SIGSEGV); 1996 } 1997 1998 long do_rt_sigreturn(CPUState *env) 1999 { 2000 fprintf(stderr, "do_rt_sigreturn: not implemented\n"); 2001 return -TARGET_ENOSYS; 2002 } 2003 2004 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 2005 #define MC_TSTATE 0 2006 #define MC_PC 1 2007 #define MC_NPC 2 2008 #define MC_Y 3 2009 #define MC_G1 4 2010 #define MC_G2 5 2011 #define MC_G3 6 2012 #define MC_G4 7 2013 #define MC_G5 8 2014 #define MC_G6 9 2015 #define MC_G7 10 2016 #define MC_O0 11 2017 #define MC_O1 12 2018 #define MC_O2 13 2019 #define MC_O3 14 2020 #define MC_O4 15 2021 #define MC_O5 16 2022 #define MC_O6 17 2023 #define MC_O7 18 2024 #define MC_NGREG 19 2025 2026 typedef abi_ulong target_mc_greg_t; 2027 typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG]; 2028 2029 struct target_mc_fq { 2030 abi_ulong *mcfq_addr; 2031 uint32_t mcfq_insn; 2032 }; 2033 2034 struct target_mc_fpu { 2035 union { 2036 uint32_t sregs[32]; 2037 uint64_t dregs[32]; 2038 //uint128_t qregs[16]; 2039 } mcfpu_fregs; 2040 abi_ulong mcfpu_fsr; 2041 abi_ulong mcfpu_fprs; 2042 abi_ulong mcfpu_gsr; 2043 struct target_mc_fq *mcfpu_fq; 2044 unsigned char mcfpu_qcnt; 2045 unsigned char mcfpu_qentsz; 2046 unsigned char mcfpu_enab; 2047 }; 2048 typedef struct target_mc_fpu target_mc_fpu_t; 2049 2050 typedef struct { 2051 target_mc_gregset_t mc_gregs; 2052 target_mc_greg_t mc_fp; 2053 target_mc_greg_t mc_i7; 2054 target_mc_fpu_t mc_fpregs; 2055 } target_mcontext_t; 2056 2057 struct target_ucontext { 2058 struct target_ucontext *uc_link; 2059 abi_ulong uc_flags; 2060 target_sigset_t uc_sigmask; 2061 target_mcontext_t uc_mcontext; 2062 }; 2063 2064 /* A V9 register window */ 2065 struct target_reg_window { 2066 abi_ulong locals[8]; 2067 abi_ulong ins[8]; 2068 }; 2069 2070 #define TARGET_STACK_BIAS 2047 2071 2072 /* {set, get}context() needed for 64-bit SparcLinux userland. */ 2073 void sparc64_set_context(CPUSPARCState *env) 2074 { 2075 abi_ulong ucp_addr; 2076 struct target_ucontext *ucp; 2077 target_mc_gregset_t *grp; 2078 abi_ulong pc, npc, tstate; 2079 abi_ulong fp, i7, w_addr; 2080 unsigned char fenab; 2081 int err; 2082 unsigned int i; 2083 2084 ucp_addr = env->regwptr[UREG_I0]; 2085 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) 2086 goto do_sigsegv; 2087 grp = &ucp->uc_mcontext.mc_gregs; 2088 err = __get_user(pc, &((*grp)[MC_PC])); 2089 err |= __get_user(npc, &((*grp)[MC_NPC])); 2090 if (err || ((pc | npc) & 3)) 2091 goto do_sigsegv; 2092 if (env->regwptr[UREG_I1]) { 2093 target_sigset_t target_set; 2094 sigset_t set; 2095 2096 if (TARGET_NSIG_WORDS == 1) { 2097 if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0])) 2098 goto do_sigsegv; 2099 } else { 2100 abi_ulong *src, *dst; 2101 src = ucp->uc_sigmask.sig; 2102 dst = target_set.sig; 2103 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); 2104 i++, dst++, src++) 2105 err |= __get_user(*dst, src); 2106 if (err) 2107 goto do_sigsegv; 2108 } 2109 target_to_host_sigset_internal(&set, &target_set); 2110 sigprocmask(SIG_SETMASK, &set, NULL); 2111 } 2112 env->pc = pc; 2113 env->npc = npc; 2114 err |= __get_user(env->y, &((*grp)[MC_Y])); 2115 err |= __get_user(tstate, &((*grp)[MC_TSTATE])); 2116 env->asi = (tstate >> 24) & 0xff; 2117 PUT_CCR(env, tstate >> 32); 2118 PUT_CWP64(env, tstate & 0x1f); 2119 err |= __get_user(env->gregs[1], (&(*grp)[MC_G1])); 2120 err |= __get_user(env->gregs[2], (&(*grp)[MC_G2])); 2121 err |= __get_user(env->gregs[3], (&(*grp)[MC_G3])); 2122 err |= __get_user(env->gregs[4], (&(*grp)[MC_G4])); 2123 err |= __get_user(env->gregs[5], (&(*grp)[MC_G5])); 2124 err |= __get_user(env->gregs[6], (&(*grp)[MC_G6])); 2125 err |= __get_user(env->gregs[7], (&(*grp)[MC_G7])); 2126 err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0])); 2127 err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1])); 2128 err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2])); 2129 err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3])); 2130 err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4])); 2131 err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5])); 2132 err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6])); 2133 err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7])); 2134 2135 err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp)); 2136 err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7)); 2137 2138 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; 2139 if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), 2140 abi_ulong) != 0) 2141 goto do_sigsegv; 2142 if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), 2143 abi_ulong) != 0) 2144 goto do_sigsegv; 2145 err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab)); 2146 err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs)); 2147 { 2148 uint32_t *src, *dst; 2149 src = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs; 2150 dst = env->fpr; 2151 /* XXX: check that the CPU storage is the same as user context */ 2152 for (i = 0; i < 64; i++, dst++, src++) 2153 err |= __get_user(*dst, src); 2154 } 2155 err |= __get_user(env->fsr, 2156 &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr)); 2157 err |= __get_user(env->gsr, 2158 &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr)); 2159 if (err) 2160 goto do_sigsegv; 2161 unlock_user_struct(ucp, ucp_addr, 0); 2162 return; 2163 do_sigsegv: 2164 unlock_user_struct(ucp, ucp_addr, 0); 2165 force_sig(SIGSEGV); 2166 } 2167 2168 void sparc64_get_context(CPUSPARCState *env) 2169 { 2170 abi_ulong ucp_addr; 2171 struct target_ucontext *ucp; 2172 target_mc_gregset_t *grp; 2173 target_mcontext_t *mcp; 2174 abi_ulong fp, i7, w_addr; 2175 int err; 2176 unsigned int i; 2177 target_sigset_t target_set; 2178 sigset_t set; 2179 2180 ucp_addr = env->regwptr[UREG_I0]; 2181 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) 2182 goto do_sigsegv; 2183 2184 mcp = &ucp->uc_mcontext; 2185 grp = &mcp->mc_gregs; 2186 2187 /* Skip over the trap instruction, first. */ 2188 env->pc = env->npc; 2189 env->npc += 4; 2190 2191 err = 0; 2192 2193 sigprocmask(0, NULL, &set); 2194 host_to_target_sigset_internal(&target_set, &set); 2195 if (TARGET_NSIG_WORDS == 1) { 2196 err |= __put_user(target_set.sig[0], 2197 (abi_ulong *)&ucp->uc_sigmask); 2198 } else { 2199 abi_ulong *src, *dst; 2200 src = target_set.sig; 2201 dst = ucp->uc_sigmask.sig; 2202 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); 2203 i++, dst++, src++) 2204 err |= __put_user(*src, dst); 2205 if (err) 2206 goto do_sigsegv; 2207 } 2208 2209 /* XXX: tstate must be saved properly */ 2210 // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE])); 2211 err |= __put_user(env->pc, &((*grp)[MC_PC])); 2212 err |= __put_user(env->npc, &((*grp)[MC_NPC])); 2213 err |= __put_user(env->y, &((*grp)[MC_Y])); 2214 err |= __put_user(env->gregs[1], &((*grp)[MC_G1])); 2215 err |= __put_user(env->gregs[2], &((*grp)[MC_G2])); 2216 err |= __put_user(env->gregs[3], &((*grp)[MC_G3])); 2217 err |= __put_user(env->gregs[4], &((*grp)[MC_G4])); 2218 err |= __put_user(env->gregs[5], &((*grp)[MC_G5])); 2219 err |= __put_user(env->gregs[6], &((*grp)[MC_G6])); 2220 err |= __put_user(env->gregs[7], &((*grp)[MC_G7])); 2221 err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0])); 2222 err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1])); 2223 err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2])); 2224 err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3])); 2225 err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4])); 2226 err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5])); 2227 err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6])); 2228 err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7])); 2229 2230 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; 2231 fp = i7 = 0; 2232 if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), 2233 abi_ulong) != 0) 2234 goto do_sigsegv; 2235 if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), 2236 abi_ulong) != 0) 2237 goto do_sigsegv; 2238 err |= __put_user(fp, &(mcp->mc_fp)); 2239 err |= __put_user(i7, &(mcp->mc_i7)); 2240 2241 { 2242 uint32_t *src, *dst; 2243 src = env->fpr; 2244 dst = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs; 2245 /* XXX: check that the CPU storage is the same as user context */ 2246 for (i = 0; i < 64; i++, dst++, src++) 2247 err |= __put_user(*src, dst); 2248 } 2249 err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr)); 2250 err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr)); 2251 err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs)); 2252 2253 if (err) 2254 goto do_sigsegv; 2255 unlock_user_struct(ucp, ucp_addr, 1); 2256 return; 2257 do_sigsegv: 2258 unlock_user_struct(ucp, ucp_addr, 1); 2259 force_sig(SIGSEGV); 2260 } 2261 #endif 2262 #elif defined(TARGET_ABI_MIPSN64) 2263 2264 # warning signal handling not implemented 2265 2266 static void setup_frame(int sig, struct target_sigaction *ka, 2267 target_sigset_t *set, CPUState *env) 2268 { 2269 fprintf(stderr, "setup_frame: not implemented\n"); 2270 } 2271 2272 static void setup_rt_frame(int sig, struct target_sigaction *ka, 2273 target_siginfo_t *info, 2274 target_sigset_t *set, CPUState *env) 2275 { 2276 fprintf(stderr, "setup_rt_frame: not implemented\n"); 2277 } 2278 2279 long do_sigreturn(CPUState *env) 2280 { 2281 fprintf(stderr, "do_sigreturn: not implemented\n"); 2282 return -TARGET_ENOSYS; 2283 } 2284 2285 long do_rt_sigreturn(CPUState *env) 2286 { 2287 fprintf(stderr, "do_rt_sigreturn: not implemented\n"); 2288 return -TARGET_ENOSYS; 2289 } 2290 2291 #elif defined(TARGET_ABI_MIPSN32) 2292 2293 # warning signal handling not implemented 2294 2295 static void setup_frame(int sig, struct target_sigaction *ka, 2296 target_sigset_t *set, CPUState *env) 2297 { 2298 fprintf(stderr, "setup_frame: not implemented\n"); 2299 } 2300 2301 static void setup_rt_frame(int sig, struct target_sigaction *ka, 2302 target_siginfo_t *info, 2303 target_sigset_t *set, CPUState *env) 2304 { 2305 fprintf(stderr, "setup_rt_frame: not implemented\n"); 2306 } 2307 2308 long do_sigreturn(CPUState *env) 2309 { 2310 fprintf(stderr, "do_sigreturn: not implemented\n"); 2311 return -TARGET_ENOSYS; 2312 } 2313 2314 long do_rt_sigreturn(CPUState *env) 2315 { 2316 fprintf(stderr, "do_rt_sigreturn: not implemented\n"); 2317 return -TARGET_ENOSYS; 2318 } 2319 2320 #elif defined(TARGET_ABI_MIPSO32) 2321 2322 struct target_sigcontext { 2323 uint32_t sc_regmask; /* Unused */ 2324 uint32_t sc_status; 2325 uint64_t sc_pc; 2326 uint64_t sc_regs[32]; 2327 uint64_t sc_fpregs[32]; 2328 uint32_t sc_ownedfp; /* Unused */ 2329 uint32_t sc_fpc_csr; 2330 uint32_t sc_fpc_eir; /* Unused */ 2331 uint32_t sc_used_math; 2332 uint32_t sc_dsp; /* dsp status, was sc_ssflags */ 2333 uint32_t pad0; 2334 uint64_t sc_mdhi; 2335 uint64_t sc_mdlo; 2336 target_ulong sc_hi1; /* Was sc_cause */ 2337 target_ulong sc_lo1; /* Was sc_badvaddr */ 2338 target_ulong sc_hi2; /* Was sc_sigset[4] */ 2339 target_ulong sc_lo2; 2340 target_ulong sc_hi3; 2341 target_ulong sc_lo3; 2342 }; 2343 2344 struct sigframe { 2345 uint32_t sf_ass[4]; /* argument save space for o32 */ 2346 uint32_t sf_code[2]; /* signal trampoline */ 2347 struct target_sigcontext sf_sc; 2348 target_sigset_t sf_mask; 2349 }; 2350 2351 struct target_ucontext { 2352 target_ulong uc_flags; 2353 target_ulong uc_link; 2354 target_stack_t uc_stack; 2355 target_ulong pad0; 2356 struct target_sigcontext uc_mcontext; 2357 target_sigset_t uc_sigmask; 2358 }; 2359 2360 struct target_rt_sigframe { 2361 uint32_t rs_ass[4]; /* argument save space for o32 */ 2362 uint32_t rs_code[2]; /* signal trampoline */ 2363 struct target_siginfo rs_info; 2364 struct target_ucontext rs_uc; 2365 }; 2366 2367 /* Install trampoline to jump back from signal handler */ 2368 static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall) 2369 { 2370 int err; 2371 2372 /* 2373 * Set up the return code ... 2374 * 2375 * li v0, __NR__foo_sigreturn 2376 * syscall 2377 */ 2378 2379 err = __put_user(0x24020000 + syscall, tramp + 0); 2380 err |= __put_user(0x0000000c , tramp + 1); 2381 /* flush_cache_sigtramp((unsigned long) tramp); */ 2382 return err; 2383 } 2384 2385 static inline int 2386 setup_sigcontext(CPUState *regs, struct target_sigcontext *sc) 2387 { 2388 int err = 0; 2389 2390 err |= __put_user(regs->active_tc.PC, &sc->sc_pc); 2391 2392 #define save_gp_reg(i) do { \ 2393 err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ 2394 } while(0) 2395 __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2); 2396 save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6); 2397 save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10); 2398 save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14); 2399 save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18); 2400 save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22); 2401 save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26); 2402 save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30); 2403 save_gp_reg(31); 2404 #undef save_gp_reg 2405 2406 err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi); 2407 err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo); 2408 2409 /* Not used yet, but might be useful if we ever have DSP suppport */ 2410 #if 0 2411 if (cpu_has_dsp) { 2412 err |= __put_user(mfhi1(), &sc->sc_hi1); 2413 err |= __put_user(mflo1(), &sc->sc_lo1); 2414 err |= __put_user(mfhi2(), &sc->sc_hi2); 2415 err |= __put_user(mflo2(), &sc->sc_lo2); 2416 err |= __put_user(mfhi3(), &sc->sc_hi3); 2417 err |= __put_user(mflo3(), &sc->sc_lo3); 2418 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); 2419 } 2420 /* same with 64 bit */ 2421 #ifdef CONFIG_64BIT 2422 err |= __put_user(regs->hi, &sc->sc_hi[0]); 2423 err |= __put_user(regs->lo, &sc->sc_lo[0]); 2424 if (cpu_has_dsp) { 2425 err |= __put_user(mfhi1(), &sc->sc_hi[1]); 2426 err |= __put_user(mflo1(), &sc->sc_lo[1]); 2427 err |= __put_user(mfhi2(), &sc->sc_hi[2]); 2428 err |= __put_user(mflo2(), &sc->sc_lo[2]); 2429 err |= __put_user(mfhi3(), &sc->sc_hi[3]); 2430 err |= __put_user(mflo3(), &sc->sc_lo[3]); 2431 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); 2432 } 2433 #endif 2434 #endif 2435 2436 #if 0 2437 err |= __put_user(!!used_math(), &sc->sc_used_math); 2438 2439 if (!used_math()) 2440 goto out; 2441 2442 /* 2443 * Save FPU state to signal context. Signal handler will "inherit" 2444 * current FPU state. 2445 */ 2446 preempt_disable(); 2447 2448 if (!is_fpu_owner()) { 2449 own_fpu(); 2450 restore_fp(current); 2451 } 2452 err |= save_fp_context(sc); 2453 2454 preempt_enable(); 2455 out: 2456 #endif 2457 return err; 2458 } 2459 2460 static inline int 2461 restore_sigcontext(CPUState *regs, struct target_sigcontext *sc) 2462 { 2463 int err = 0; 2464 2465 err |= __get_user(regs->CP0_EPC, &sc->sc_pc); 2466 2467 err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi); 2468 err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo); 2469 2470 #define restore_gp_reg(i) do { \ 2471 err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ 2472 } while(0) 2473 restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3); 2474 restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6); 2475 restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9); 2476 restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12); 2477 restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15); 2478 restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18); 2479 restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21); 2480 restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24); 2481 restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27); 2482 restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30); 2483 restore_gp_reg(31); 2484 #undef restore_gp_reg 2485 2486 #if 0 2487 if (cpu_has_dsp) { 2488 err |= __get_user(treg, &sc->sc_hi1); mthi1(treg); 2489 err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg); 2490 err |= __get_user(treg, &sc->sc_hi2); mthi2(treg); 2491 err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg); 2492 err |= __get_user(treg, &sc->sc_hi3); mthi3(treg); 2493 err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg); 2494 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); 2495 } 2496 #ifdef CONFIG_64BIT 2497 err |= __get_user(regs->hi, &sc->sc_hi[0]); 2498 err |= __get_user(regs->lo, &sc->sc_lo[0]); 2499 if (cpu_has_dsp) { 2500 err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg); 2501 err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg); 2502 err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg); 2503 err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg); 2504 err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg); 2505 err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg); 2506 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); 2507 } 2508 #endif 2509 2510 err |= __get_user(used_math, &sc->sc_used_math); 2511 conditional_used_math(used_math); 2512 2513 preempt_disable(); 2514 2515 if (used_math()) { 2516 /* restore fpu context if we have used it before */ 2517 own_fpu(); 2518 err |= restore_fp_context(sc); 2519 } else { 2520 /* signal handler may have used FPU. Give it up. */ 2521 lose_fpu(); 2522 } 2523 2524 preempt_enable(); 2525 #endif 2526 return err; 2527 } 2528 /* 2529 * Determine which stack to use.. 2530 */ 2531 static inline abi_ulong 2532 get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size) 2533 { 2534 unsigned long sp; 2535 2536 /* Default to using normal stack */ 2537 sp = regs->active_tc.gpr[29]; 2538 2539 /* 2540 * FPU emulator may have it's own trampoline active just 2541 * above the user stack, 16-bytes before the next lowest 2542 * 16 byte boundary. Try to avoid trashing it. 2543 */ 2544 sp -= 32; 2545 2546 /* This is the X/Open sanctioned signal stack switching. */ 2547 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { 2548 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 2549 } 2550 2551 return (sp - frame_size) & ~7; 2552 } 2553 2554 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */ 2555 static void setup_frame(int sig, struct target_sigaction * ka, 2556 target_sigset_t *set, CPUState *regs) 2557 { 2558 struct sigframe *frame; 2559 abi_ulong frame_addr; 2560 int i; 2561 2562 frame_addr = get_sigframe(ka, regs, sizeof(*frame)); 2563 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 2564 goto give_sigsegv; 2565 2566 install_sigtramp(frame->sf_code, TARGET_NR_sigreturn); 2567 2568 if(setup_sigcontext(regs, &frame->sf_sc)) 2569 goto give_sigsegv; 2570 2571 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 2572 if(__put_user(set->sig[i], &frame->sf_mask.sig[i])) 2573 goto give_sigsegv; 2574 } 2575 2576 /* 2577 * Arguments to signal handler: 2578 * 2579 * a0 = signal number 2580 * a1 = 0 (should be cause) 2581 * a2 = pointer to struct sigcontext 2582 * 2583 * $25 and PC point to the signal handler, $29 points to the 2584 * struct sigframe. 2585 */ 2586 regs->active_tc.gpr[ 4] = sig; 2587 regs->active_tc.gpr[ 5] = 0; 2588 regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc); 2589 regs->active_tc.gpr[29] = frame_addr; 2590 regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code); 2591 /* The original kernel code sets CP0_EPC to the handler 2592 * since it returns to userland using eret 2593 * we cannot do this here, and we must set PC directly */ 2594 regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler; 2595 unlock_user_struct(frame, frame_addr, 1); 2596 return; 2597 2598 give_sigsegv: 2599 unlock_user_struct(frame, frame_addr, 1); 2600 force_sig(TARGET_SIGSEGV/*, current*/); 2601 return; 2602 } 2603 2604 long do_sigreturn(CPUState *regs) 2605 { 2606 struct sigframe *frame; 2607 abi_ulong frame_addr; 2608 sigset_t blocked; 2609 target_sigset_t target_set; 2610 int i; 2611 2612 #if defined(DEBUG_SIGNAL) 2613 fprintf(stderr, "do_sigreturn\n"); 2614 #endif 2615 frame_addr = regs->active_tc.gpr[29]; 2616 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 2617 goto badframe; 2618 2619 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 2620 if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i])) 2621 goto badframe; 2622 } 2623 2624 target_to_host_sigset_internal(&blocked, &target_set); 2625 sigprocmask(SIG_SETMASK, &blocked, NULL); 2626 2627 if (restore_sigcontext(regs, &frame->sf_sc)) 2628 goto badframe; 2629 2630 #if 0 2631 /* 2632 * Don't let your children do this ... 2633 */ 2634 __asm__ __volatile__( 2635 "move\t$29, %0\n\t" 2636 "j\tsyscall_exit" 2637 :/* no outputs */ 2638 :"r" (®s)); 2639 /* Unreached */ 2640 #endif 2641 2642 regs->active_tc.PC = regs->CP0_EPC; 2643 /* I am not sure this is right, but it seems to work 2644 * maybe a problem with nested signals ? */ 2645 regs->CP0_EPC = 0; 2646 return -TARGET_QEMU_ESIGRETURN; 2647 2648 badframe: 2649 force_sig(TARGET_SIGSEGV/*, current*/); 2650 return 0; 2651 } 2652 2653 static void setup_rt_frame(int sig, struct target_sigaction *ka, 2654 target_siginfo_t *info, 2655 target_sigset_t *set, CPUState *env) 2656 { 2657 struct target_rt_sigframe *frame; 2658 abi_ulong frame_addr; 2659 int i; 2660 2661 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 2662 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 2663 goto give_sigsegv; 2664 2665 install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn); 2666 2667 copy_siginfo_to_user(&frame->rs_info, info); 2668 2669 __put_user(0, &frame->rs_uc.uc_flags); 2670 __put_user(0, &frame->rs_uc.uc_link); 2671 __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.uc_stack.ss_sp); 2672 __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.uc_stack.ss_size); 2673 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), 2674 &frame->rs_uc.uc_stack.ss_flags); 2675 2676 setup_sigcontext(env, &frame->rs_uc.uc_mcontext); 2677 2678 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 2679 __put_user(set->sig[i], &frame->rs_uc.uc_sigmask.sig[i]); 2680 } 2681 2682 /* 2683 * Arguments to signal handler: 2684 * 2685 * a0 = signal number 2686 * a1 = pointer to struct siginfo 2687 * a2 = pointer to struct ucontext 2688 * 2689 * $25 and PC point to the signal handler, $29 points to the 2690 * struct sigframe. 2691 */ 2692 env->active_tc.gpr[ 4] = sig; 2693 env->active_tc.gpr[ 5] = frame_addr 2694 + offsetof(struct target_rt_sigframe, rs_info); 2695 env->active_tc.gpr[ 6] = frame_addr 2696 + offsetof(struct target_rt_sigframe, rs_uc); 2697 env->active_tc.gpr[29] = frame_addr; 2698 env->active_tc.gpr[31] = frame_addr 2699 + offsetof(struct target_rt_sigframe, rs_code); 2700 /* The original kernel code sets CP0_EPC to the handler 2701 * since it returns to userland using eret 2702 * we cannot do this here, and we must set PC directly */ 2703 env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler; 2704 unlock_user_struct(frame, frame_addr, 1); 2705 return; 2706 2707 give_sigsegv: 2708 unlock_user_struct(frame, frame_addr, 1); 2709 force_sig(TARGET_SIGSEGV/*, current*/); 2710 return; 2711 } 2712 2713 long do_rt_sigreturn(CPUState *env) 2714 { 2715 struct target_rt_sigframe *frame; 2716 abi_ulong frame_addr; 2717 sigset_t blocked; 2718 2719 #if defined(DEBUG_SIGNAL) 2720 fprintf(stderr, "do_rt_sigreturn\n"); 2721 #endif 2722 frame_addr = env->active_tc.gpr[29]; 2723 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 2724 goto badframe; 2725 2726 target_to_host_sigset(&blocked, &frame->rs_uc.uc_sigmask); 2727 sigprocmask(SIG_SETMASK, &blocked, NULL); 2728 2729 if (restore_sigcontext(env, &frame->rs_uc.uc_mcontext)) 2730 goto badframe; 2731 2732 if (do_sigaltstack(frame_addr + 2733 offsetof(struct target_rt_sigframe, rs_uc.uc_stack), 2734 0, get_sp_from_cpustate(env)) == -EFAULT) 2735 goto badframe; 2736 2737 env->active_tc.PC = env->CP0_EPC; 2738 /* I am not sure this is right, but it seems to work 2739 * maybe a problem with nested signals ? */ 2740 env->CP0_EPC = 0; 2741 return -TARGET_QEMU_ESIGRETURN; 2742 2743 badframe: 2744 force_sig(TARGET_SIGSEGV/*, current*/); 2745 return 0; 2746 } 2747 2748 #elif defined(TARGET_SH4) 2749 2750 /* 2751 * code and data structures from linux kernel: 2752 * include/asm-sh/sigcontext.h 2753 * arch/sh/kernel/signal.c 2754 */ 2755 2756 struct target_sigcontext { 2757 target_ulong oldmask; 2758 2759 /* CPU registers */ 2760 target_ulong sc_gregs[16]; 2761 target_ulong sc_pc; 2762 target_ulong sc_pr; 2763 target_ulong sc_sr; 2764 target_ulong sc_gbr; 2765 target_ulong sc_mach; 2766 target_ulong sc_macl; 2767 2768 /* FPU registers */ 2769 target_ulong sc_fpregs[16]; 2770 target_ulong sc_xfpregs[16]; 2771 unsigned int sc_fpscr; 2772 unsigned int sc_fpul; 2773 unsigned int sc_ownedfp; 2774 }; 2775 2776 struct target_sigframe 2777 { 2778 struct target_sigcontext sc; 2779 target_ulong extramask[TARGET_NSIG_WORDS-1]; 2780 uint16_t retcode[3]; 2781 }; 2782 2783 2784 struct target_ucontext { 2785 target_ulong uc_flags; 2786 struct target_ucontext *uc_link; 2787 target_stack_t uc_stack; 2788 struct target_sigcontext uc_mcontext; 2789 target_sigset_t uc_sigmask; /* mask last for extensibility */ 2790 }; 2791 2792 struct target_rt_sigframe 2793 { 2794 struct target_siginfo info; 2795 struct target_ucontext uc; 2796 uint16_t retcode[3]; 2797 }; 2798 2799 2800 #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */ 2801 #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */ 2802 2803 static abi_ulong get_sigframe(struct target_sigaction *ka, 2804 unsigned long sp, size_t frame_size) 2805 { 2806 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) { 2807 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 2808 } 2809 2810 return (sp - frame_size) & -8ul; 2811 } 2812 2813 static int setup_sigcontext(struct target_sigcontext *sc, 2814 CPUState *regs, unsigned long mask) 2815 { 2816 int err = 0; 2817 2818 #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) 2819 COPY(gregs[0]); COPY(gregs[1]); 2820 COPY(gregs[2]); COPY(gregs[3]); 2821 COPY(gregs[4]); COPY(gregs[5]); 2822 COPY(gregs[6]); COPY(gregs[7]); 2823 COPY(gregs[8]); COPY(gregs[9]); 2824 COPY(gregs[10]); COPY(gregs[11]); 2825 COPY(gregs[12]); COPY(gregs[13]); 2826 COPY(gregs[14]); COPY(gregs[15]); 2827 COPY(gbr); COPY(mach); 2828 COPY(macl); COPY(pr); 2829 COPY(sr); COPY(pc); 2830 #undef COPY 2831 2832 /* todo: save FPU registers here */ 2833 2834 /* non-iBCS2 extensions.. */ 2835 err |= __put_user(mask, &sc->oldmask); 2836 2837 return err; 2838 } 2839 2840 static int restore_sigcontext(CPUState *regs, 2841 struct target_sigcontext *sc) 2842 { 2843 unsigned int err = 0; 2844 2845 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) 2846 COPY(gregs[1]); 2847 COPY(gregs[2]); COPY(gregs[3]); 2848 COPY(gregs[4]); COPY(gregs[5]); 2849 COPY(gregs[6]); COPY(gregs[7]); 2850 COPY(gregs[8]); COPY(gregs[9]); 2851 COPY(gregs[10]); COPY(gregs[11]); 2852 COPY(gregs[12]); COPY(gregs[13]); 2853 COPY(gregs[14]); COPY(gregs[15]); 2854 COPY(gbr); COPY(mach); 2855 COPY(macl); COPY(pr); 2856 COPY(sr); COPY(pc); 2857 #undef COPY 2858 2859 /* todo: restore FPU registers here */ 2860 2861 regs->tra = -1; /* disable syscall checks */ 2862 return err; 2863 } 2864 2865 static void setup_frame(int sig, struct target_sigaction *ka, 2866 target_sigset_t *set, CPUState *regs) 2867 { 2868 struct target_sigframe *frame; 2869 abi_ulong frame_addr; 2870 int i; 2871 int err = 0; 2872 int signal; 2873 2874 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); 2875 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 2876 goto give_sigsegv; 2877 2878 signal = current_exec_domain_sig(sig); 2879 2880 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]); 2881 2882 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { 2883 err |= __put_user(set->sig[i + 1], &frame->extramask[i]); 2884 } 2885 2886 /* Set up to return from userspace. If provided, use a stub 2887 already in userspace. */ 2888 if (ka->sa_flags & TARGET_SA_RESTORER) { 2889 regs->pr = (unsigned long) ka->sa_restorer; 2890 } else { 2891 /* Generate return code (system call to sigreturn) */ 2892 err |= __put_user(MOVW(2), &frame->retcode[0]); 2893 err |= __put_user(TRAP_NOARG, &frame->retcode[1]); 2894 err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]); 2895 regs->pr = (unsigned long) frame->retcode; 2896 } 2897 2898 if (err) 2899 goto give_sigsegv; 2900 2901 /* Set up registers for signal handler */ 2902 regs->gregs[15] = (unsigned long) frame; 2903 regs->gregs[4] = signal; /* Arg for signal handler */ 2904 regs->gregs[5] = 0; 2905 regs->gregs[6] = (unsigned long) &frame->sc; 2906 regs->pc = (unsigned long) ka->_sa_handler; 2907 2908 unlock_user_struct(frame, frame_addr, 1); 2909 return; 2910 2911 give_sigsegv: 2912 unlock_user_struct(frame, frame_addr, 1); 2913 force_sig(SIGSEGV); 2914 } 2915 2916 static void setup_rt_frame(int sig, struct target_sigaction *ka, 2917 target_siginfo_t *info, 2918 target_sigset_t *set, CPUState *regs) 2919 { 2920 struct target_rt_sigframe *frame; 2921 abi_ulong frame_addr; 2922 int i; 2923 int err = 0; 2924 int signal; 2925 2926 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); 2927 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 2928 goto give_sigsegv; 2929 2930 signal = current_exec_domain_sig(sig); 2931 2932 err |= copy_siginfo_to_user(&frame->info, info); 2933 2934 /* Create the ucontext. */ 2935 err |= __put_user(0, &frame->uc.uc_flags); 2936 err |= __put_user(0, (unsigned long *)&frame->uc.uc_link); 2937 err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp, 2938 &frame->uc.uc_stack.ss_sp); 2939 err |= __put_user(sas_ss_flags(regs->gregs[15]), 2940 &frame->uc.uc_stack.ss_flags); 2941 err |= __put_user(target_sigaltstack_used.ss_size, 2942 &frame->uc.uc_stack.ss_size); 2943 err |= setup_sigcontext(&frame->uc.uc_mcontext, 2944 regs, set->sig[0]); 2945 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 2946 err |= __put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]); 2947 } 2948 2949 /* Set up to return from userspace. If provided, use a stub 2950 already in userspace. */ 2951 if (ka->sa_flags & TARGET_SA_RESTORER) { 2952 regs->pr = (unsigned long) ka->sa_restorer; 2953 } else { 2954 /* Generate return code (system call to sigreturn) */ 2955 err |= __put_user(MOVW(2), &frame->retcode[0]); 2956 err |= __put_user(TRAP_NOARG, &frame->retcode[1]); 2957 err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]); 2958 regs->pr = (unsigned long) frame->retcode; 2959 } 2960 2961 if (err) 2962 goto give_sigsegv; 2963 2964 /* Set up registers for signal handler */ 2965 regs->gregs[15] = (unsigned long) frame; 2966 regs->gregs[4] = signal; /* Arg for signal handler */ 2967 regs->gregs[5] = (unsigned long) &frame->info; 2968 regs->gregs[6] = (unsigned long) &frame->uc; 2969 regs->pc = (unsigned long) ka->_sa_handler; 2970 2971 unlock_user_struct(frame, frame_addr, 1); 2972 return; 2973 2974 give_sigsegv: 2975 unlock_user_struct(frame, frame_addr, 1); 2976 force_sig(SIGSEGV); 2977 } 2978 2979 long do_sigreturn(CPUState *regs) 2980 { 2981 struct target_sigframe *frame; 2982 abi_ulong frame_addr; 2983 sigset_t blocked; 2984 target_sigset_t target_set; 2985 int i; 2986 int err = 0; 2987 2988 #if defined(DEBUG_SIGNAL) 2989 fprintf(stderr, "do_sigreturn\n"); 2990 #endif 2991 frame_addr = regs->gregs[15]; 2992 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 2993 goto badframe; 2994 2995 err |= __get_user(target_set.sig[0], &frame->sc.oldmask); 2996 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 2997 err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1])); 2998 } 2999 3000 if (err) 3001 goto badframe; 3002 3003 target_to_host_sigset_internal(&blocked, &target_set); 3004 sigprocmask(SIG_SETMASK, &blocked, NULL); 3005 3006 if (restore_sigcontext(regs, &frame->sc)) 3007 goto badframe; 3008 3009 unlock_user_struct(frame, frame_addr, 0); 3010 return regs->gregs[0]; 3011 3012 badframe: 3013 unlock_user_struct(frame, frame_addr, 0); 3014 force_sig(TARGET_SIGSEGV); 3015 return 0; 3016 } 3017 3018 long do_rt_sigreturn(CPUState *regs) 3019 { 3020 struct target_rt_sigframe *frame; 3021 abi_ulong frame_addr; 3022 sigset_t blocked; 3023 3024 #if defined(DEBUG_SIGNAL) 3025 fprintf(stderr, "do_rt_sigreturn\n"); 3026 #endif 3027 frame_addr = regs->gregs[15]; 3028 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) 3029 goto badframe; 3030 3031 target_to_host_sigset(&blocked, &frame->uc.uc_sigmask); 3032 sigprocmask(SIG_SETMASK, &blocked, NULL); 3033 3034 if (restore_sigcontext(regs, &frame->uc.uc_mcontext)) 3035 goto badframe; 3036 3037 if (do_sigaltstack(frame_addr + 3038 offsetof(struct target_rt_sigframe, uc.uc_stack), 3039 0, get_sp_from_cpustate(regs)) == -EFAULT) 3040 goto badframe; 3041 3042 unlock_user_struct(frame, frame_addr, 0); 3043 return regs->gregs[0]; 3044 3045 badframe: 3046 unlock_user_struct(frame, frame_addr, 0); 3047 force_sig(TARGET_SIGSEGV); 3048 return 0; 3049 } 3050 #elif defined(TARGET_MICROBLAZE) 3051 3052 struct target_sigcontext { 3053 struct target_pt_regs regs; /* needs to be first */ 3054 uint32_t oldmask; 3055 }; 3056 3057 /* Signal frames. */ 3058 struct target_signal_frame { 3059 struct target_sigcontext sc; 3060 uint32_t extramask[TARGET_NSIG_WORDS - 1]; 3061 uint32_t tramp[2]; 3062 }; 3063 3064 struct rt_signal_frame { 3065 struct siginfo info; 3066 struct ucontext uc; 3067 uint32_t tramp[2]; 3068 }; 3069 3070 static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) 3071 { 3072 __put_user(env->regs[0], &sc->regs.r0); 3073 __put_user(env->regs[1], &sc->regs.r1); 3074 __put_user(env->regs[2], &sc->regs.r2); 3075 __put_user(env->regs[3], &sc->regs.r3); 3076 __put_user(env->regs[4], &sc->regs.r4); 3077 __put_user(env->regs[5], &sc->regs.r5); 3078 __put_user(env->regs[6], &sc->regs.r6); 3079 __put_user(env->regs[7], &sc->regs.r7); 3080 __put_user(env->regs[8], &sc->regs.r8); 3081 __put_user(env->regs[9], &sc->regs.r9); 3082 __put_user(env->regs[10], &sc->regs.r10); 3083 __put_user(env->regs[11], &sc->regs.r11); 3084 __put_user(env->regs[12], &sc->regs.r12); 3085 __put_user(env->regs[13], &sc->regs.r13); 3086 __put_user(env->regs[14], &sc->regs.r14); 3087 __put_user(env->regs[15], &sc->regs.r15); 3088 __put_user(env->regs[16], &sc->regs.r16); 3089 __put_user(env->regs[17], &sc->regs.r17); 3090 __put_user(env->regs[18], &sc->regs.r18); 3091 __put_user(env->regs[19], &sc->regs.r19); 3092 __put_user(env->regs[20], &sc->regs.r20); 3093 __put_user(env->regs[21], &sc->regs.r21); 3094 __put_user(env->regs[22], &sc->regs.r22); 3095 __put_user(env->regs[23], &sc->regs.r23); 3096 __put_user(env->regs[24], &sc->regs.r24); 3097 __put_user(env->regs[25], &sc->regs.r25); 3098 __put_user(env->regs[26], &sc->regs.r26); 3099 __put_user(env->regs[27], &sc->regs.r27); 3100 __put_user(env->regs[28], &sc->regs.r28); 3101 __put_user(env->regs[29], &sc->regs.r29); 3102 __put_user(env->regs[30], &sc->regs.r30); 3103 __put_user(env->regs[31], &sc->regs.r31); 3104 __put_user(env->sregs[SR_PC], &sc->regs.pc); 3105 } 3106 3107 static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) 3108 { 3109 __get_user(env->regs[0], &sc->regs.r0); 3110 __get_user(env->regs[1], &sc->regs.r1); 3111 __get_user(env->regs[2], &sc->regs.r2); 3112 __get_user(env->regs[3], &sc->regs.r3); 3113 __get_user(env->regs[4], &sc->regs.r4); 3114 __get_user(env->regs[5], &sc->regs.r5); 3115 __get_user(env->regs[6], &sc->regs.r6); 3116 __get_user(env->regs[7], &sc->regs.r7); 3117 __get_user(env->regs[8], &sc->regs.r8); 3118 __get_user(env->regs[9], &sc->regs.r9); 3119 __get_user(env->regs[10], &sc->regs.r10); 3120 __get_user(env->regs[11], &sc->regs.r11); 3121 __get_user(env->regs[12], &sc->regs.r12); 3122 __get_user(env->regs[13], &sc->regs.r13); 3123 __get_user(env->regs[14], &sc->regs.r14); 3124 __get_user(env->regs[15], &sc->regs.r15); 3125 __get_user(env->regs[16], &sc->regs.r16); 3126 __get_user(env->regs[17], &sc->regs.r17); 3127 __get_user(env->regs[18], &sc->regs.r18); 3128 __get_user(env->regs[19], &sc->regs.r19); 3129 __get_user(env->regs[20], &sc->regs.r20); 3130 __get_user(env->regs[21], &sc->regs.r21); 3131 __get_user(env->regs[22], &sc->regs.r22); 3132 __get_user(env->regs[23], &sc->regs.r23); 3133 __get_user(env->regs[24], &sc->regs.r24); 3134 __get_user(env->regs[25], &sc->regs.r25); 3135 __get_user(env->regs[26], &sc->regs.r26); 3136 __get_user(env->regs[27], &sc->regs.r27); 3137 __get_user(env->regs[28], &sc->regs.r28); 3138 __get_user(env->regs[29], &sc->regs.r29); 3139 __get_user(env->regs[30], &sc->regs.r30); 3140 __get_user(env->regs[31], &sc->regs.r31); 3141 __get_user(env->sregs[SR_PC], &sc->regs.pc); 3142 } 3143 3144 static abi_ulong get_sigframe(struct target_sigaction *ka, 3145 CPUState *env, int frame_size) 3146 { 3147 abi_ulong sp = env->regs[1]; 3148 3149 if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp)) 3150 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; 3151 3152 return ((sp - frame_size) & -8UL); 3153 } 3154 3155 static void setup_frame(int sig, struct target_sigaction *ka, 3156 target_sigset_t *set, CPUState *env) 3157 { 3158 struct target_signal_frame *frame; 3159 abi_ulong frame_addr; 3160 int err = 0; 3161 int i; 3162 3163 frame_addr = get_sigframe(ka, env, sizeof *frame); 3164 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 3165 goto badframe; 3166 3167 /* Save the mask. */ 3168 err |= __put_user(set->sig[0], &frame->sc.oldmask); 3169 if (err) 3170 goto badframe; 3171 3172 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3173 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 3174 goto badframe; 3175 } 3176 3177 setup_sigcontext(&frame->sc, env); 3178 3179 /* Set up to return from userspace. If provided, use a stub 3180 already in userspace. */ 3181 /* minus 8 is offset to cater for "rtsd r15,8" offset */ 3182 if (ka->sa_flags & TARGET_SA_RESTORER) { 3183 env->regs[15] = ((unsigned long)ka->sa_restorer)-8; 3184 } else { 3185 uint32_t t; 3186 /* Note, these encodings are _big endian_! */ 3187 /* addi r12, r0, __NR_sigreturn */ 3188 t = 0x31800000UL | TARGET_NR_sigreturn; 3189 err |= __put_user(t, frame->tramp + 0); 3190 /* brki r14, 0x8 */ 3191 t = 0xb9cc0008UL; 3192 err |= __put_user(t, frame->tramp + 1); 3193 3194 /* Return from sighandler will jump to the tramp. 3195 Negative 8 offset because return is rtsd r15, 8 */ 3196 env->regs[15] = ((unsigned long)frame->tramp) - 8; 3197 } 3198 3199 if (err) 3200 goto badframe; 3201 3202 /* Set up registers for signal handler */ 3203 env->regs[1] = (unsigned long) frame; 3204 /* Signal handler args: */ 3205 env->regs[5] = sig; /* Arg 0: signum */ 3206 env->regs[6] = (unsigned long) &frame->sc; /* arg 1: sigcontext */ 3207 3208 /* Offset of 4 to handle microblaze rtid r14, 0 */ 3209 env->sregs[SR_PC] = (unsigned long)ka->_sa_handler; 3210 3211 unlock_user_struct(frame, frame_addr, 1); 3212 return; 3213 badframe: 3214 unlock_user_struct(frame, frame_addr, 1); 3215 force_sig(TARGET_SIGSEGV); 3216 } 3217 3218 static void setup_rt_frame(int sig, struct target_sigaction *ka, 3219 target_siginfo_t *info, 3220 target_sigset_t *set, CPUState *env) 3221 { 3222 fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n"); 3223 } 3224 3225 long do_sigreturn(CPUState *env) 3226 { 3227 struct target_signal_frame *frame; 3228 abi_ulong frame_addr; 3229 target_sigset_t target_set; 3230 sigset_t set; 3231 int i; 3232 3233 frame_addr = env->regs[R_SP]; 3234 /* Make sure the guest isn't playing games. */ 3235 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) 3236 goto badframe; 3237 3238 /* Restore blocked signals */ 3239 if (__get_user(target_set.sig[0], &frame->sc.oldmask)) 3240 goto badframe; 3241 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3242 if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) 3243 goto badframe; 3244 } 3245 target_to_host_sigset_internal(&set, &target_set); 3246 sigprocmask(SIG_SETMASK, &set, NULL); 3247 3248 restore_sigcontext(&frame->sc, env); 3249 /* We got here through a sigreturn syscall, our path back is via an 3250 rtb insn so setup r14 for that. */ 3251 env->regs[14] = env->sregs[SR_PC]; 3252 3253 unlock_user_struct(frame, frame_addr, 0); 3254 return env->regs[10]; 3255 badframe: 3256 unlock_user_struct(frame, frame_addr, 0); 3257 force_sig(TARGET_SIGSEGV); 3258 } 3259 3260 long do_rt_sigreturn(CPUState *env) 3261 { 3262 fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n"); 3263 return -TARGET_ENOSYS; 3264 } 3265 3266 #elif defined(TARGET_CRIS) 3267 3268 struct target_sigcontext { 3269 struct target_pt_regs regs; /* needs to be first */ 3270 uint32_t oldmask; 3271 uint32_t usp; /* usp before stacking this gunk on it */ 3272 }; 3273 3274 /* Signal frames. */ 3275 struct target_signal_frame { 3276 struct target_sigcontext sc; 3277 uint32_t extramask[TARGET_NSIG_WORDS - 1]; 3278 uint8_t retcode[8]; /* Trampoline code. */ 3279 }; 3280 3281 struct rt_signal_frame { 3282 struct siginfo *pinfo; 3283 void *puc; 3284 struct siginfo info; 3285 struct ucontext uc; 3286 uint8_t retcode[8]; /* Trampoline code. */ 3287 }; 3288 3289 static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) 3290 { 3291 __put_user(env->regs[0], &sc->regs.r0); 3292 __put_user(env->regs[1], &sc->regs.r1); 3293 __put_user(env->regs[2], &sc->regs.r2); 3294 __put_user(env->regs[3], &sc->regs.r3); 3295 __put_user(env->regs[4], &sc->regs.r4); 3296 __put_user(env->regs[5], &sc->regs.r5); 3297 __put_user(env->regs[6], &sc->regs.r6); 3298 __put_user(env->regs[7], &sc->regs.r7); 3299 __put_user(env->regs[8], &sc->regs.r8); 3300 __put_user(env->regs[9], &sc->regs.r9); 3301 __put_user(env->regs[10], &sc->regs.r10); 3302 __put_user(env->regs[11], &sc->regs.r11); 3303 __put_user(env->regs[12], &sc->regs.r12); 3304 __put_user(env->regs[13], &sc->regs.r13); 3305 __put_user(env->regs[14], &sc->usp); 3306 __put_user(env->regs[15], &sc->regs.acr); 3307 __put_user(env->pregs[PR_MOF], &sc->regs.mof); 3308 __put_user(env->pregs[PR_SRP], &sc->regs.srp); 3309 __put_user(env->pc, &sc->regs.erp); 3310 } 3311 3312 static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) 3313 { 3314 __get_user(env->regs[0], &sc->regs.r0); 3315 __get_user(env->regs[1], &sc->regs.r1); 3316 __get_user(env->regs[2], &sc->regs.r2); 3317 __get_user(env->regs[3], &sc->regs.r3); 3318 __get_user(env->regs[4], &sc->regs.r4); 3319 __get_user(env->regs[5], &sc->regs.r5); 3320 __get_user(env->regs[6], &sc->regs.r6); 3321 __get_user(env->regs[7], &sc->regs.r7); 3322 __get_user(env->regs[8], &sc->regs.r8); 3323 __get_user(env->regs[9], &sc->regs.r9); 3324 __get_user(env->regs[10], &sc->regs.r10); 3325 __get_user(env->regs[11], &sc->regs.r11); 3326 __get_user(env->regs[12], &sc->regs.r12); 3327 __get_user(env->regs[13], &sc->regs.r13); 3328 __get_user(env->regs[14], &sc->usp); 3329 __get_user(env->regs[15], &sc->regs.acr); 3330 __get_user(env->pregs[PR_MOF], &sc->regs.mof); 3331 __get_user(env->pregs[PR_SRP], &sc->regs.srp); 3332 __get_user(env->pc, &sc->regs.erp); 3333 } 3334 3335 static abi_ulong get_sigframe(CPUState *env, int framesize) 3336 { 3337 abi_ulong sp; 3338 /* Align the stack downwards to 4. */ 3339 sp = (env->regs[R_SP] & ~3); 3340 return sp - framesize; 3341 } 3342 3343 static void setup_frame(int sig, struct target_sigaction *ka, 3344 target_sigset_t *set, CPUState *env) 3345 { 3346 struct target_signal_frame *frame; 3347 abi_ulong frame_addr; 3348 int err = 0; 3349 int i; 3350 3351 frame_addr = get_sigframe(env, sizeof *frame); 3352 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) 3353 goto badframe; 3354 3355 /* 3356 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't 3357 * use this trampoline anymore but it sets it up for GDB. 3358 * In QEMU, using the trampoline simplifies things a bit so we use it. 3359 * 3360 * This is movu.w __NR_sigreturn, r9; break 13; 3361 */ 3362 err |= __put_user(0x9c5f, frame->retcode+0); 3363 err |= __put_user(TARGET_NR_sigreturn, 3364 frame->retcode+2); 3365 err |= __put_user(0xe93d, frame->retcode+4); 3366 3367 /* Save the mask. */ 3368 err |= __put_user(set->sig[0], &frame->sc.oldmask); 3369 if (err) 3370 goto badframe; 3371 3372 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3373 if (__put_user(set->sig[i], &frame->extramask[i - 1])) 3374 goto badframe; 3375 } 3376 3377 setup_sigcontext(&frame->sc, env); 3378 3379 /* Move the stack and setup the arguments for the handler. */ 3380 env->regs[R_SP] = (uint32_t) (unsigned long) frame; 3381 env->regs[10] = sig; 3382 env->pc = (unsigned long) ka->_sa_handler; 3383 /* Link SRP so the guest returns through the trampoline. */ 3384 env->pregs[PR_SRP] = (uint32_t) (unsigned long) &frame->retcode[0]; 3385 3386 unlock_user_struct(frame, frame_addr, 1); 3387 return; 3388 badframe: 3389 unlock_user_struct(frame, frame_addr, 1); 3390 force_sig(TARGET_SIGSEGV); 3391 } 3392 3393 static void setup_rt_frame(int sig, struct target_sigaction *ka, 3394 target_siginfo_t *info, 3395 target_sigset_t *set, CPUState *env) 3396 { 3397 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n"); 3398 } 3399 3400 long do_sigreturn(CPUState *env) 3401 { 3402 struct target_signal_frame *frame; 3403 abi_ulong frame_addr; 3404 target_sigset_t target_set; 3405 sigset_t set; 3406 int i; 3407 3408 frame_addr = env->regs[R_SP]; 3409 /* Make sure the guest isn't playing games. */ 3410 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) 3411 goto badframe; 3412 3413 /* Restore blocked signals */ 3414 if (__get_user(target_set.sig[0], &frame->sc.oldmask)) 3415 goto badframe; 3416 for(i = 1; i < TARGET_NSIG_WORDS; i++) { 3417 if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) 3418 goto badframe; 3419 } 3420 target_to_host_sigset_internal(&set, &target_set); 3421 sigprocmask(SIG_SETMASK, &set, NULL); 3422 3423 restore_sigcontext(&frame->sc, env); 3424 unlock_user_struct(frame, frame_addr, 0); 3425 return env->regs[10]; 3426 badframe: 3427 unlock_user_struct(frame, frame_addr, 0); 3428 force_sig(TARGET_SIGSEGV); 3429 } 3430 3431 long do_rt_sigreturn(CPUState *env) 3432 { 3433 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n"); 3434 return -TARGET_ENOSYS; 3435 } 3436 3437 #elif defined(TARGET_PPC) && !defined(TARGET_PPC64) 3438 3439 /* FIXME: Many of the structures are defined for both PPC and PPC64, but 3440 the signal handling is different enough that we haven't implemented 3441 support for PPC64 yet. Hence the restriction above. 3442 3443 There are various #if'd blocks for code for TARGET_PPC64. These 3444 blocks should go away so that we can successfully run 32-bit and 3445 64-bit binaries on a QEMU configured for PPC64. */ 3446 3447 /* Size of dummy stack frame allocated when calling signal handler. 3448 See arch/powerpc/include/asm/ptrace.h. */ 3449 #if defined(TARGET_PPC64) 3450 #define SIGNAL_FRAMESIZE 128 3451 #else 3452 #define SIGNAL_FRAMESIZE 64 3453 #endif 3454 3455 /* See arch/powerpc/include/asm/sigcontext.h. */ 3456 struct target_sigcontext { 3457 target_ulong _unused[4]; 3458 int32_t signal; 3459 #if defined(TARGET_PPC64) 3460 int32_t pad0; 3461 #endif 3462 target_ulong handler; 3463 target_ulong oldmask; 3464 target_ulong regs; /* struct pt_regs __user * */ 3465 /* TODO: PPC64 includes extra bits here. */ 3466 }; 3467 3468 /* Indices for target_mcontext.mc_gregs, below. 3469 See arch/powerpc/include/asm/ptrace.h for details. */ 3470 enum { 3471 TARGET_PT_R0 = 0, 3472 TARGET_PT_R1 = 1, 3473 TARGET_PT_R2 = 2, 3474 TARGET_PT_R3 = 3, 3475 TARGET_PT_R4 = 4, 3476 TARGET_PT_R5 = 5, 3477 TARGET_PT_R6 = 6, 3478 TARGET_PT_R7 = 7, 3479 TARGET_PT_R8 = 8, 3480 TARGET_PT_R9 = 9, 3481 TARGET_PT_R10 = 10, 3482 TARGET_PT_R11 = 11, 3483 TARGET_PT_R12 = 12, 3484 TARGET_PT_R13 = 13, 3485 TARGET_PT_R14 = 14, 3486 TARGET_PT_R15 = 15, 3487 TARGET_PT_R16 = 16, 3488 TARGET_PT_R17 = 17, 3489 TARGET_PT_R18 = 18, 3490 TARGET_PT_R19 = 19, 3491 TARGET_PT_R20 = 20, 3492 TARGET_PT_R21 = 21, 3493 TARGET_PT_R22 = 22, 3494 TARGET_PT_R23 = 23, 3495 TARGET_PT_R24 = 24, 3496 TARGET_PT_R25 = 25, 3497 TARGET_PT_R26 = 26, 3498 TARGET_PT_R27 = 27, 3499 TARGET_PT_R28 = 28, 3500 TARGET_PT_R29 = 29, 3501 TARGET_PT_R30 = 30, 3502 TARGET_PT_R31 = 31, 3503 TARGET_PT_NIP = 32, 3504 TARGET_PT_MSR = 33, 3505 TARGET_PT_ORIG_R3 = 34, 3506 TARGET_PT_CTR = 35, 3507 TARGET_PT_LNK = 36, 3508 TARGET_PT_XER = 37, 3509 TARGET_PT_CCR = 38, 3510 /* Yes, there are two registers with #39. One is 64-bit only. */ 3511 TARGET_PT_MQ = 39, 3512 TARGET_PT_SOFTE = 39, 3513 TARGET_PT_TRAP = 40, 3514 TARGET_PT_DAR = 41, 3515 TARGET_PT_DSISR = 42, 3516 TARGET_PT_RESULT = 43, 3517 TARGET_PT_REGS_COUNT = 44 3518 }; 3519 3520 /* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC; 3521 on 64-bit PPC, sigcontext and mcontext are one and the same. */ 3522 struct target_mcontext { 3523 target_ulong mc_gregs[48]; 3524 /* Includes fpscr. */ 3525 uint64_t mc_fregs[33]; 3526 target_ulong mc_pad[2]; 3527 /* We need to handle Altivec and SPE at the same time, which no 3528 kernel needs to do. Fortunately, the kernel defines this bit to 3529 be Altivec-register-large all the time, rather than trying to 3530 twiddle it based on the specific platform. */ 3531 union { 3532 /* SPE vector registers. One extra for SPEFSCR. */ 3533 uint32_t spe[33]; 3534 /* Altivec vector registers. The packing of VSCR and VRSAVE 3535 varies depending on whether we're PPC64 or not: PPC64 splits 3536 them apart; PPC32 stuffs them together. */ 3537 #if defined(TARGET_PPC64) 3538 #define NVRREG 34 3539 #else 3540 #define NVRREG 33 3541 #endif 3542 ppc_avr_t altivec[NVRREG]; 3543 #undef NVRREG 3544 } mc_vregs __attribute__((__aligned__(16))); 3545 }; 3546 3547 struct target_ucontext { 3548 target_ulong uc_flags; 3549 target_ulong uc_link; /* struct ucontext __user * */ 3550 struct target_sigaltstack uc_stack; 3551 #if !defined(TARGET_PPC64) 3552 int32_t uc_pad[7]; 3553 target_ulong uc_regs; /* struct mcontext __user * 3554 points to uc_mcontext field */ 3555 #endif 3556 target_sigset_t uc_sigmask; 3557 #if defined(TARGET_PPC64) 3558 target_sigset_t unused[15]; /* Allow for uc_sigmask growth */ 3559 struct target_sigcontext uc_mcontext; 3560 #else 3561 int32_t uc_maskext[30]; 3562 int32_t uc_pad2[3]; 3563 struct target_mcontext uc_mcontext; 3564 #endif 3565 }; 3566 3567 /* See arch/powerpc/kernel/signal_32.c. */ 3568 struct target_sigframe { 3569 struct target_sigcontext sctx; 3570 struct target_mcontext mctx; 3571 int32_t abigap[56]; 3572 }; 3573 3574 struct target_rt_sigframe { 3575 struct target_siginfo info; 3576 struct target_ucontext uc; 3577 int32_t abigap[56]; 3578 }; 3579 3580 /* We use the mc_pad field for the signal return trampoline. */ 3581 #define tramp mc_pad 3582 3583 /* See arch/powerpc/kernel/signal.c. */ 3584 static target_ulong get_sigframe(struct target_sigaction *ka, 3585 CPUState *env, 3586 int frame_size) 3587 { 3588 target_ulong oldsp, newsp; 3589 3590 oldsp = env->gpr[1]; 3591 3592 if ((ka->sa_flags & TARGET_SA_ONSTACK) && 3593 (sas_ss_flags(oldsp))) { 3594 oldsp = (target_sigaltstack_used.ss_sp 3595 + target_sigaltstack_used.ss_size); 3596 } 3597 3598 newsp = (oldsp - frame_size) & ~0xFUL; 3599 3600 return newsp; 3601 } 3602 3603 static int save_user_regs(CPUState *env, struct target_mcontext *frame, 3604 int sigret) 3605 { 3606 target_ulong msr = env->msr; 3607 int i; 3608 target_ulong ccr = 0; 3609 3610 /* In general, the kernel attempts to be intelligent about what it 3611 needs to save for Altivec/FP/SPE registers. We don't care that 3612 much, so we just go ahead and save everything. */ 3613 3614 /* Save general registers. */ 3615 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { 3616 if (__put_user(env->gpr[i], &frame->mc_gregs[i])) { 3617 return 1; 3618 } 3619 } 3620 if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]) 3621 || __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]) 3622 || __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]) 3623 || __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER])) 3624 return 1; 3625 3626 for (i = 0; i < ARRAY_SIZE(env->crf); i++) { 3627 ccr |= env->crf[i] << (32 - ((i + 1) * 4)); 3628 } 3629 if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR])) 3630 return 1; 3631 3632 /* Save Altivec registers if necessary. */ 3633 if (env->insns_flags & PPC_ALTIVEC) { 3634 for (i = 0; i < ARRAY_SIZE(env->avr); i++) { 3635 ppc_avr_t *avr = &env->avr[i]; 3636 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; 3637 3638 if (__put_user(avr->u64[0], &vreg->u64[0]) || 3639 __put_user(avr->u64[1], &vreg->u64[1])) { 3640 return 1; 3641 } 3642 } 3643 /* Set MSR_VR in the saved MSR value to indicate that 3644 frame->mc_vregs contains valid data. */ 3645 msr |= MSR_VR; 3646 if (__put_user((uint32_t)env->spr[SPR_VRSAVE], 3647 &frame->mc_vregs.altivec[32].u32[3])) 3648 return 1; 3649 } 3650 3651 /* Save floating point registers. */ 3652 if (env->insns_flags & PPC_FLOAT) { 3653 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { 3654 if (__put_user(env->fpr[i], &frame->mc_fregs[i])) { 3655 return 1; 3656 } 3657 } 3658 if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32])) 3659 return 1; 3660 } 3661 3662 /* Save SPE registers. The kernel only saves the high half. */ 3663 if (env->insns_flags & PPC_SPE) { 3664 #if defined(TARGET_PPC64) 3665 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { 3666 if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) { 3667 return 1; 3668 } 3669 } 3670 #else 3671 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { 3672 if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) { 3673 return 1; 3674 } 3675 } 3676 #endif 3677 /* Set MSR_SPE in the saved MSR value to indicate that 3678 frame->mc_vregs contains valid data. */ 3679 msr |= MSR_SPE; 3680 if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32])) 3681 return 1; 3682 } 3683 3684 /* Store MSR. */ 3685 if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR])) 3686 return 1; 3687 3688 /* Set up the sigreturn trampoline: li r0,sigret; sc. */ 3689 if (sigret) { 3690 if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) || 3691 __put_user(0x44000002UL, &frame->tramp[1])) { 3692 return 1; 3693 } 3694 } 3695 3696 return 0; 3697 } 3698 3699 static int restore_user_regs(CPUState *env, 3700 struct target_mcontext *frame, int sig) 3701 { 3702 target_ulong save_r2 = 0; 3703 target_ulong msr; 3704 target_ulong ccr; 3705 3706 int i; 3707 3708 if (!sig) { 3709 save_r2 = env->gpr[2]; 3710 } 3711 3712 /* Restore general registers. */ 3713 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { 3714 if (__get_user(env->gpr[i], &frame->mc_gregs[i])) { 3715 return 1; 3716 } 3717 } 3718 if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]) 3719 || __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]) 3720 || __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]) 3721 || __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER])) 3722 return 1; 3723 if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR])) 3724 return 1; 3725 3726 for (i = 0; i < ARRAY_SIZE(env->crf); i++) { 3727 env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf; 3728 } 3729 3730 if (!sig) { 3731 env->gpr[2] = save_r2; 3732 } 3733 /* Restore MSR. */ 3734 if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR])) 3735 return 1; 3736 3737 /* If doing signal return, restore the previous little-endian mode. */ 3738 if (sig) 3739 env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE); 3740 3741 /* Restore Altivec registers if necessary. */ 3742 if (env->insns_flags & PPC_ALTIVEC) { 3743 for (i = 0; i < ARRAY_SIZE(env->avr); i++) { 3744 ppc_avr_t *avr = &env->avr[i]; 3745 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; 3746 3747 if (__get_user(avr->u64[0], &vreg->u64[0]) || 3748 __get_user(avr->u64[1], &vreg->u64[1])) { 3749 return 1; 3750 } 3751 } 3752 /* Set MSR_VEC in the saved MSR value to indicate that 3753 frame->mc_vregs contains valid data. */ 3754 if (__get_user(env->spr[SPR_VRSAVE], 3755 (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3]))) 3756 return 1; 3757 } 3758 3759 /* Restore floating point registers. */ 3760 if (env->insns_flags & PPC_FLOAT) { 3761 uint64_t fpscr; 3762 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { 3763 if (__get_user(env->fpr[i], &frame->mc_fregs[i])) { 3764 return 1; 3765 } 3766 } 3767 if (__get_user(fpscr, &frame->mc_fregs[32])) 3768 return 1; 3769 env->fpscr = (uint32_t) fpscr; 3770 } 3771 3772 /* Save SPE registers. The kernel only saves the high half. */ 3773 if (env->insns_flags & PPC_SPE) { 3774 #if defined(TARGET_PPC64) 3775 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { 3776 uint32_t hi; 3777 3778 if (__get_user(hi, &frame->mc_vregs.spe[i])) { 3779 return 1; 3780 } 3781 env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]); 3782 } 3783 #else 3784 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { 3785 if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) { 3786 return 1; 3787 } 3788 } 3789 #endif 3790 if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32])) 3791 return 1; 3792 } 3793 3794 return 0; 3795 } 3796 3797 static void setup_frame(int sig, struct target_sigaction *ka, 3798 target_sigset_t *set, CPUState *env) 3799 { 3800 struct target_sigframe *frame; 3801 struct target_sigcontext *sc; 3802 target_ulong frame_addr, newsp; 3803 int err = 0; 3804 int signal; 3805 3806 frame_addr = get_sigframe(ka, env, sizeof(*frame)); 3807 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) 3808 goto sigsegv; 3809 sc = &frame->sctx; 3810 3811 signal = current_exec_domain_sig(sig); 3812 3813 err |= __put_user(h2g(ka->_sa_handler), &sc->handler); 3814 err |= __put_user(set->sig[0], &sc->oldmask); 3815 #if defined(TARGET_PPC64) 3816 err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]); 3817 #else 3818 err |= __put_user(set->sig[1], &sc->_unused[3]); 3819 #endif 3820 err |= __put_user(h2g(&frame->mctx), &sc->regs); 3821 err |= __put_user(sig, &sc->signal); 3822 3823 /* Save user regs. */ 3824 err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn); 3825 3826 /* The kernel checks for the presence of a VDSO here. We don't 3827 emulate a vdso, so use a sigreturn system call. */ 3828 env->lr = (target_ulong) h2g(frame->mctx.tramp); 3829 3830 /* Turn off all fp exceptions. */ 3831 env->fpscr = 0; 3832 3833 /* Create a stack frame for the caller of the handler. */ 3834 newsp = frame_addr - SIGNAL_FRAMESIZE; 3835 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp); 3836 3837 if (err) 3838 goto sigsegv; 3839 3840 /* Set up registers for signal handler. */ 3841 env->gpr[1] = newsp; 3842 env->gpr[3] = signal; 3843 env->gpr[4] = (target_ulong) h2g(sc); 3844 env->nip = (target_ulong) ka->_sa_handler; 3845 /* Signal handlers are entered in big-endian mode. */ 3846 env->msr &= ~MSR_LE; 3847 3848 unlock_user_struct(frame, frame_addr, 1); 3849 return; 3850 3851 sigsegv: 3852 unlock_user_struct(frame, frame_addr, 1); 3853 if (logfile) 3854 fprintf (logfile, "segfaulting from setup_frame\n"); 3855 force_sig(SIGSEGV); 3856 } 3857 3858 static void setup_rt_frame(int sig, struct target_sigaction *ka, 3859 target_siginfo_t *info, 3860 target_sigset_t *set, CPUState *env) 3861 { 3862 struct target_rt_sigframe *rt_sf; 3863 struct target_mcontext *frame; 3864 target_ulong rt_sf_addr, newsp = 0; 3865 int i, err = 0; 3866 int signal; 3867 3868 rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf)); 3869 if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1)) 3870 goto sigsegv; 3871 3872 signal = current_exec_domain_sig(sig); 3873 3874 err |= copy_siginfo_to_user(&rt_sf->info, info); 3875 3876 err |= __put_user(0, &rt_sf->uc.uc_flags); 3877 err |= __put_user(0, &rt_sf->uc.uc_link); 3878 err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp, 3879 &rt_sf->uc.uc_stack.ss_sp); 3880 err |= __put_user(sas_ss_flags(env->gpr[1]), 3881 &rt_sf->uc.uc_stack.ss_flags); 3882 err |= __put_user(target_sigaltstack_used.ss_size, 3883 &rt_sf->uc.uc_stack.ss_size); 3884 err |= __put_user(h2g (&rt_sf->uc.uc_mcontext), 3885 &rt_sf->uc.uc_regs); 3886 for(i = 0; i < TARGET_NSIG_WORDS; i++) { 3887 err |= __put_user(set->sig[i], &rt_sf->uc.uc_sigmask.sig[i]); 3888 } 3889 3890 frame = &rt_sf->uc.uc_mcontext; 3891 err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn); 3892 3893 /* The kernel checks for the presence of a VDSO here. We don't 3894 emulate a vdso, so use a sigreturn system call. */ 3895 env->lr = (target_ulong) h2g(frame->tramp); 3896 3897 /* Turn off all fp exceptions. */ 3898 env->fpscr = 0; 3899 3900 /* Create a stack frame for the caller of the handler. */ 3901 newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16); 3902 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp); 3903 3904 if (err) 3905 goto sigsegv; 3906 3907 /* Set up registers for signal handler. */ 3908 env->gpr[1] = newsp; 3909 env->gpr[3] = (target_ulong) signal; 3910 env->gpr[4] = (target_ulong) h2g(&rt_sf->info); 3911 env->gpr[5] = (target_ulong) h2g(&rt_sf->uc); 3912 env->gpr[6] = (target_ulong) h2g(rt_sf); 3913 env->nip = (target_ulong) ka->_sa_handler; 3914 /* Signal handlers are entered in big-endian mode. */ 3915 env->msr &= ~MSR_LE; 3916 3917 unlock_user_struct(rt_sf, rt_sf_addr, 1); 3918 return; 3919 3920 sigsegv: 3921 unlock_user_struct(rt_sf, rt_sf_addr, 1); 3922 if (logfile) 3923 fprintf (logfile, "segfaulting from setup_rt_frame\n"); 3924 force_sig(SIGSEGV); 3925 3926 } 3927 3928 long do_sigreturn(CPUState *env) 3929 { 3930 struct target_sigcontext *sc = NULL; 3931 struct target_mcontext *sr = NULL; 3932 target_ulong sr_addr, sc_addr; 3933 sigset_t blocked; 3934 target_sigset_t set; 3935 3936 sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE; 3937 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) 3938 goto sigsegv; 3939 3940 #if defined(TARGET_PPC64) 3941 set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32); 3942 #else 3943 if(__get_user(set.sig[0], &sc->oldmask) || 3944 __get_user(set.sig[1], &sc->_unused[3])) 3945 goto sigsegv; 3946 #endif 3947 target_to_host_sigset_internal(&blocked, &set); 3948 sigprocmask(SIG_SETMASK, &blocked, NULL); 3949 3950 if (__get_user(sr_addr, &sc->regs)) 3951 goto sigsegv; 3952 if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1)) 3953 goto sigsegv; 3954 if (restore_user_regs(env, sr, 1)) 3955 goto sigsegv; 3956 3957 unlock_user_struct(sr, sr_addr, 1); 3958 unlock_user_struct(sc, sc_addr, 1); 3959 return -TARGET_QEMU_ESIGRETURN; 3960 3961 sigsegv: 3962 unlock_user_struct(sr, sr_addr, 1); 3963 unlock_user_struct(sc, sc_addr, 1); 3964 if (logfile) 3965 fprintf (logfile, "segfaulting from do_sigreturn\n"); 3966 force_sig(SIGSEGV); 3967 return 0; 3968 } 3969 3970 /* See arch/powerpc/kernel/signal_32.c. */ 3971 static int do_setcontext(struct target_ucontext *ucp, CPUState *env, int sig) 3972 { 3973 struct target_mcontext *mcp; 3974 target_ulong mcp_addr; 3975 sigset_t blocked; 3976 target_sigset_t set; 3977 3978 if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, uc_sigmask), 3979 sizeof (set))) 3980 return 1; 3981 3982 #if defined(TARGET_PPC64) 3983 fprintf (stderr, "do_setcontext: not implemented\n"); 3984 return 0; 3985 #else 3986 if (__get_user(mcp_addr, &ucp->uc_regs)) 3987 return 1; 3988 3989 if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1)) 3990 return 1; 3991 3992 target_to_host_sigset_internal(&blocked, &set); 3993 sigprocmask(SIG_SETMASK, &blocked, NULL); 3994 if (restore_user_regs(env, mcp, sig)) 3995 goto sigsegv; 3996 3997 unlock_user_struct(mcp, mcp_addr, 1); 3998 return 0; 3999 4000 sigsegv: 4001 unlock_user_struct(mcp, mcp_addr, 1); 4002 return 1; 4003 #endif 4004 } 4005 4006 long do_rt_sigreturn(CPUState *env) 4007 { 4008 struct target_rt_sigframe *rt_sf = NULL; 4009 target_ulong rt_sf_addr; 4010 4011 rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16; 4012 if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1)) 4013 goto sigsegv; 4014 4015 if (do_setcontext(&rt_sf->uc, env, 1)) 4016 goto sigsegv; 4017 4018 do_sigaltstack(rt_sf_addr 4019 + offsetof(struct target_rt_sigframe, uc.uc_stack), 4020 0, env->gpr[1]); 4021 4022 unlock_user_struct(rt_sf, rt_sf_addr, 1); 4023 return -TARGET_QEMU_ESIGRETURN; 4024 4025 sigsegv: 4026 unlock_user_struct(rt_sf, rt_sf_addr, 1); 4027 if (logfile) 4028 fprintf (logfile, "segfaulting from do_rt_sigreturn\n"); 4029 force_sig(SIGSEGV); 4030 return 0; 4031 } 4032 4033 #else 4034 4035 static void setup_frame(int sig, struct target_sigaction *ka, 4036 target_sigset_t *set, CPUState *env) 4037 { 4038 fprintf(stderr, "setup_frame: not implemented\n"); 4039 } 4040 4041 static void setup_rt_frame(int sig, struct target_sigaction *ka, 4042 target_siginfo_t *info, 4043 target_sigset_t *set, CPUState *env) 4044 { 4045 fprintf(stderr, "setup_rt_frame: not implemented\n"); 4046 } 4047 4048 long do_sigreturn(CPUState *env) 4049 { 4050 fprintf(stderr, "do_sigreturn: not implemented\n"); 4051 return -TARGET_ENOSYS; 4052 } 4053 4054 long do_rt_sigreturn(CPUState *env) 4055 { 4056 fprintf(stderr, "do_rt_sigreturn: not implemented\n"); 4057 return -TARGET_ENOSYS; 4058 } 4059 4060 #endif 4061 4062 void process_pending_signals(CPUState *cpu_env) 4063 { 4064 int sig; 4065 abi_ulong handler; 4066 sigset_t set, old_set; 4067 target_sigset_t target_old_set; 4068 struct emulated_sigtable *k; 4069 struct target_sigaction *sa; 4070 struct sigqueue *q; 4071 TaskState *ts = cpu_env->opaque; 4072 4073 if (!ts->signal_pending) 4074 return; 4075 4076 /* FIXME: This is not threadsafe. */ 4077 k = ts->sigtab; 4078 for(sig = 1; sig <= TARGET_NSIG; sig++) { 4079 if (k->pending) 4080 goto handle_signal; 4081 k++; 4082 } 4083 /* if no signal is pending, just return */ 4084 ts->signal_pending = 0; 4085 return; 4086 4087 handle_signal: 4088 #ifdef DEBUG_SIGNAL 4089 fprintf(stderr, "qemu: process signal %d\n", sig); 4090 #endif 4091 /* dequeue signal */ 4092 q = k->first; 4093 k->first = q->next; 4094 if (!k->first) 4095 k->pending = 0; 4096 4097 sig = gdb_handlesig (cpu_env, sig); 4098 if (!sig) { 4099 sa = NULL; 4100 handler = TARGET_SIG_IGN; 4101 } else { 4102 sa = &sigact_table[sig - 1]; 4103 handler = sa->_sa_handler; 4104 } 4105 4106 if (handler == TARGET_SIG_DFL) { 4107 /* default handler : ignore some signal. The other are job control or fatal */ 4108 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) { 4109 kill(getpid(),SIGSTOP); 4110 } else if (sig != TARGET_SIGCHLD && 4111 sig != TARGET_SIGURG && 4112 sig != TARGET_SIGWINCH && 4113 sig != TARGET_SIGCONT) { 4114 force_sig(sig); 4115 } 4116 } else if (handler == TARGET_SIG_IGN) { 4117 /* ignore sig */ 4118 } else if (handler == TARGET_SIG_ERR) { 4119 force_sig(sig); 4120 } else { 4121 /* compute the blocked signals during the handler execution */ 4122 target_to_host_sigset(&set, &sa->sa_mask); 4123 /* SA_NODEFER indicates that the current signal should not be 4124 blocked during the handler */ 4125 if (!(sa->sa_flags & TARGET_SA_NODEFER)) 4126 sigaddset(&set, target_to_host_signal(sig)); 4127 4128 /* block signals in the handler using Linux */ 4129 sigprocmask(SIG_BLOCK, &set, &old_set); 4130 /* save the previous blocked signal state to restore it at the 4131 end of the signal execution (see do_sigreturn) */ 4132 host_to_target_sigset_internal(&target_old_set, &old_set); 4133 4134 /* if the CPU is in VM86 mode, we restore the 32 bit values */ 4135 #if defined(TARGET_I386) && !defined(TARGET_X86_64) 4136 { 4137 CPUX86State *env = cpu_env; 4138 if (env->eflags & VM_MASK) 4139 save_v86_state(env); 4140 } 4141 #endif 4142 /* prepare the stack frame of the virtual CPU */ 4143 if (sa->sa_flags & TARGET_SA_SIGINFO) 4144 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env); 4145 else 4146 setup_frame(sig, sa, &target_old_set, cpu_env); 4147 if (sa->sa_flags & TARGET_SA_RESETHAND) 4148 sa->_sa_handler = TARGET_SIG_DFL; 4149 } 4150 if (q != &k->info) 4151 free_sigqueue(cpu_env, q); 4152 } 4153