File:  [Qemu by Fabrice Bellard] / qemu / linux-user / signal.c
Revision 1.1.1.11 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 18:35:50 2018 UTC (3 years, 3 months ago) by root
Branches: qemu, MAIN
CVS tags: qemu0150, qemu0141, qemu0140, HEAD
qemu 0.14.0

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

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