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1.1 root 1: /*
2: * Emulation of Linux signals
1.1.1.6 root 3: *
1.1 root 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
1.1.1.8 root 17: * along with this program; if not, see <http://www.gnu.org/licenses/>.
1.1 root 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>
1.1.1.8 root 26: #include <assert.h>
1.1 root 27: #include <sys/ucontext.h>
1.1.1.8 root 28: #include <sys/resource.h>
1.1 root 29:
30: #include "qemu.h"
1.1.1.7 root 31: #include "qemu-common.h"
1.1.1.6 root 32: #include "target_signal.h"
1.1 root 33:
34: //#define DEBUG_SIGNAL
35:
1.1.1.7 root 36: static struct target_sigaltstack target_sigaltstack_used = {
1.1.1.6 root 37: .ss_sp = 0,
38: .ss_size = 0,
39: .ss_flags = TARGET_SS_DISABLE,
40: };
41:
1.1.1.7 root 42: static struct target_sigaction sigact_table[TARGET_NSIG];
1.1 root 43:
1.1.1.6 root 44: static void host_signal_handler(int host_signum, siginfo_t *info,
1.1 root 45: void *puc);
46:
1.1.1.9 ! root 47: static uint8_t host_to_target_signal_table[_NSIG] = {
1.1 root 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 */
1.1.1.7 root 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,
1.1 root 89: };
1.1.1.9 ! root 90: static uint8_t target_to_host_signal_table[_NSIG];
1.1 root 91:
1.1.1.6 root 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:
1.1.1.8 root 104: int host_to_target_signal(int sig)
1.1 root 105: {
1.1.1.9 ! root 106: if (sig >= _NSIG)
1.1.1.7 root 107: return sig;
1.1 root 108: return host_to_target_signal_table[sig];
109: }
110:
1.1.1.7 root 111: int target_to_host_signal(int sig)
1.1 root 112: {
1.1.1.9 ! root 113: if (sig >= _NSIG)
1.1.1.7 root 114: return sig;
1.1 root 115: return target_to_host_signal_table[sig];
116: }
117:
1.1.1.7 root 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:
1.1.1.6 root 137: static void host_to_target_sigset_internal(target_sigset_t *d,
1.1 root 138: const sigset_t *s)
139: {
140: int i;
1.1.1.7 root 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: }
1.1 root 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++)
1.1.1.3 root 156: d->sig[i] = tswapl(d1.sig[i]);
1.1 root 157: }
158:
1.1.1.7 root 159: static void target_to_host_sigset_internal(sigset_t *d,
160: const target_sigset_t *s)
1.1 root 161: {
162: int i;
1.1.1.7 root 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: }
1.1 root 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++)
1.1.1.3 root 177: s1.sig[i] = tswapl(s->sig[i]);
1.1 root 178: target_to_host_sigset_internal(d, &s1);
179: }
1.1.1.6 root 180:
181: void host_to_target_old_sigset(abi_ulong *old_sigset,
1.1 root 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:
1.1.1.6 root 189: void target_to_host_old_sigset(sigset_t *sigset,
190: const abi_ulong *old_sigset)
1.1 root 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:
1.1.1.6 root 203: static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
1.1 root 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;
1.1.1.7 root 210: tinfo->si_code = info->si_code;
1.1.1.6 root 211: if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
1.1 root 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;
1.1.1.6 root 216: } else if (sig == SIGIO) {
217: tinfo->_sifields._sigpoll._fd = info->si_fd;
1.1 root 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 */
1.1.1.6 root 222: tinfo->_sifields._rt._sigval.sival_ptr =
223: (abi_ulong)(unsigned long)info->si_value.sival_ptr;
1.1 root 224: }
225: }
226:
1.1.1.6 root 227: static void tswap_siginfo(target_siginfo_t *tinfo,
1.1 root 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);
1.1.1.6 root 235: if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
1.1 root 236: sig == SIGBUS || sig == SIGTRAP) {
1.1.1.6 root 237: tinfo->_sifields._sigfault._addr =
1.1 root 238: tswapl(info->_sifields._sigfault._addr);
1.1.1.6 root 239: } else if (sig == SIGIO) {
240: tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
1.1 root 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);
1.1.1.6 root 244: tinfo->_sifields._rt._sigval.sival_ptr =
1.1 root 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. */
1.1.1.6 root 257: /* XXX: find a solution for 64 bit (additional malloced data is needed) */
1.1 root 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);
1.1.1.6 root 265: info->si_value.sival_ptr =
266: (void *)(long)tswapl(tinfo->_sifields._rt._sigval.sival_ptr);
1.1 root 267: }
268:
1.1.1.7 root 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:
1.1.1.8 root 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:
1.1 root 306: void signal_init(void)
307: {
308: struct sigaction act;
1.1.1.7 root 309: struct sigaction oact;
1.1 root 310: int i, j;
1.1.1.7 root 311: int host_sig;
1.1 root 312:
313: /* generate signal conversion tables */
1.1.1.9 ! root 314: for(i = 1; i < _NSIG; i++) {
1.1 root 315: if (host_to_target_signal_table[i] == 0)
316: host_to_target_signal_table[i] = i;
317: }
1.1.1.9 ! root 318: for(i = 1; i < _NSIG; i++) {
1.1 root 319: j = host_to_target_signal_table[i];
320: target_to_host_signal_table[j] = i;
321: }
1.1.1.6 root 322:
1.1 root 323: /* set all host signal handlers. ALL signals are blocked during
324: the handlers to serialize them. */
1.1.1.7 root 325: memset(sigact_table, 0, sizeof(sigact_table));
326:
1.1 root 327: sigfillset(&act.sa_mask);
328: act.sa_flags = SA_SIGINFO;
329: act.sa_sigaction = host_signal_handler;
1.1.1.7 root 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);
1.1 root 346: }
347: }
348:
349: /* signal queue handling */
350:
1.1.1.7 root 351: static inline struct sigqueue *alloc_sigqueue(CPUState *env)
1.1 root 352: {
1.1.1.7 root 353: TaskState *ts = env->opaque;
354: struct sigqueue *q = ts->first_free;
1.1 root 355: if (!q)
356: return NULL;
1.1.1.7 root 357: ts->first_free = q->next;
1.1 root 358: return q;
359: }
360:
1.1.1.7 root 361: static inline void free_sigqueue(CPUState *env, struct sigqueue *q)
1.1 root 362: {
1.1.1.7 root 363: TaskState *ts = env->opaque;
364: q->next = ts->first_free;
365: ts->first_free = q;
1.1 root 366: }
367:
368: /* abort execution with signal */
1.1.1.7 root 369: static void QEMU_NORETURN force_sig(int sig)
1.1 root 370: {
1.1.1.8 root 371: TaskState *ts = (TaskState *)thread_env->opaque;
372: int host_sig, core_dumped = 0;
373: struct sigaction act;
1.1 root 374: host_sig = target_to_host_signal(sig);
1.1.1.7 root 375: gdb_signalled(thread_env, sig);
1.1.1.8 root 376:
377: /* dump core if supported by target binary format */
378: if (core_dump_signal(sig) && (ts->bprm->core_dump != NULL)) {
379: stop_all_tasks();
380: core_dumped =
381: ((*ts->bprm->core_dump)(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: 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: assert(0);
415:
1.1 root 416: }
417:
418: /* queue a signal so that it will be send to the virtual CPU as soon
419: as possible */
1.1.1.7 root 420: int queue_signal(CPUState *env, int sig, target_siginfo_t *info)
1.1 root 421: {
1.1.1.7 root 422: TaskState *ts = env->opaque;
423: struct emulated_sigtable *k;
1.1 root 424: struct sigqueue *q, **pq;
1.1.1.6 root 425: abi_ulong handler;
1.1.1.7 root 426: int queue;
1.1 root 427:
428: #if defined(DEBUG_SIGNAL)
1.1.1.6 root 429: fprintf(stderr, "queue_signal: sig=%d\n",
1.1 root 430: sig);
431: #endif
1.1.1.7 root 432: k = &ts->sigtab[sig - 1];
433: queue = gdb_queuesig ();
434: handler = sigact_table[sig - 1]._sa_handler;
435: if (!queue && handler == TARGET_SIG_DFL) {
436: if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
437: kill(getpid(),SIGSTOP);
438: return 0;
439: } else
1.1 root 440: /* default handler : ignore some signal. The other are fatal */
1.1.1.6 root 441: if (sig != TARGET_SIGCHLD &&
442: sig != TARGET_SIGURG &&
1.1.1.7 root 443: sig != TARGET_SIGWINCH &&
444: sig != TARGET_SIGCONT) {
1.1 root 445: force_sig(sig);
446: } else {
447: return 0; /* indicate ignored */
448: }
1.1.1.7 root 449: } else if (!queue && handler == TARGET_SIG_IGN) {
1.1 root 450: /* ignore signal */
451: return 0;
1.1.1.7 root 452: } else if (!queue && handler == TARGET_SIG_ERR) {
1.1 root 453: force_sig(sig);
454: } else {
455: pq = &k->first;
456: if (sig < TARGET_SIGRTMIN) {
457: /* if non real time signal, we queue exactly one signal */
458: if (!k->pending)
459: q = &k->info;
460: else
461: return 0;
462: } else {
463: if (!k->pending) {
464: /* first signal */
465: q = &k->info;
466: } else {
1.1.1.7 root 467: q = alloc_sigqueue(env);
1.1 root 468: if (!q)
469: return -EAGAIN;
470: while (*pq != NULL)
471: pq = &(*pq)->next;
472: }
473: }
474: *pq = q;
475: q->info = *info;
476: q->next = NULL;
477: k->pending = 1;
478: /* signal that a new signal is pending */
1.1.1.7 root 479: ts->signal_pending = 1;
1.1 root 480: return 1; /* indicates that the signal was queued */
481: }
482: }
483:
1.1.1.6 root 484: static void host_signal_handler(int host_signum, siginfo_t *info,
1.1 root 485: void *puc)
486: {
487: int sig;
488: target_siginfo_t tinfo;
489:
490: /* the CPU emulator uses some host signals to detect exceptions,
1.1.1.7 root 491: we forward to it some signals */
492: if ((host_signum == SIGSEGV || host_signum == SIGBUS)
493: && info->si_code > 0) {
1.1 root 494: if (cpu_signal_handler(host_signum, info, puc))
495: return;
496: }
497:
498: /* get target signal number */
499: sig = host_to_target_signal(host_signum);
500: if (sig < 1 || sig > TARGET_NSIG)
501: return;
502: #if defined(DEBUG_SIGNAL)
503: fprintf(stderr, "qemu: got signal %d\n", sig);
504: #endif
505: host_to_target_siginfo_noswap(&tinfo, info);
1.1.1.7 root 506: if (queue_signal(thread_env, sig, &tinfo) == 1) {
1.1 root 507: /* interrupt the virtual CPU as soon as possible */
1.1.1.8 root 508: cpu_exit(thread_env);
1.1 root 509: }
510: }
511:
1.1.1.6 root 512: /* do_sigaltstack() returns target values and errnos. */
513: /* compare linux/kernel/signal.c:do_sigaltstack() */
514: abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
515: {
516: int ret;
517: struct target_sigaltstack oss;
518:
519: /* XXX: test errors */
520: if(uoss_addr)
521: {
522: __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
523: __put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
524: __put_user(sas_ss_flags(sp), &oss.ss_flags);
525: }
526:
527: if(uss_addr)
528: {
529: struct target_sigaltstack *uss;
530: struct target_sigaltstack ss;
531:
532: ret = -TARGET_EFAULT;
533: if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)
534: || __get_user(ss.ss_sp, &uss->ss_sp)
535: || __get_user(ss.ss_size, &uss->ss_size)
536: || __get_user(ss.ss_flags, &uss->ss_flags))
537: goto out;
538: unlock_user_struct(uss, uss_addr, 0);
539:
540: ret = -TARGET_EPERM;
541: if (on_sig_stack(sp))
542: goto out;
543:
544: ret = -TARGET_EINVAL;
545: if (ss.ss_flags != TARGET_SS_DISABLE
546: && ss.ss_flags != TARGET_SS_ONSTACK
547: && ss.ss_flags != 0)
548: goto out;
549:
550: if (ss.ss_flags == TARGET_SS_DISABLE) {
551: ss.ss_size = 0;
552: ss.ss_sp = 0;
553: } else {
554: ret = -TARGET_ENOMEM;
555: if (ss.ss_size < MINSIGSTKSZ)
556: goto out;
557: }
558:
559: target_sigaltstack_used.ss_sp = ss.ss_sp;
560: target_sigaltstack_used.ss_size = ss.ss_size;
561: }
562:
563: if (uoss_addr) {
564: ret = -TARGET_EFAULT;
565: if (copy_to_user(uoss_addr, &oss, sizeof(oss)))
566: goto out;
567: }
568:
569: ret = 0;
570: out:
571: return ret;
572: }
573:
574: /* do_sigaction() return host values and errnos */
1.1 root 575: int do_sigaction(int sig, const struct target_sigaction *act,
576: struct target_sigaction *oact)
577: {
1.1.1.7 root 578: struct target_sigaction *k;
1.1 root 579: struct sigaction act1;
580: int host_sig;
1.1.1.6 root 581: int ret = 0;
1.1 root 582:
1.1.1.7 root 583: if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP)
1.1 root 584: return -EINVAL;
585: k = &sigact_table[sig - 1];
586: #if defined(DEBUG_SIGNAL)
1.1.1.8 root 587: fprintf(stderr, "sigaction sig=%d act=0x%p, oact=0x%p\n",
588: sig, act, oact);
1.1 root 589: #endif
590: if (oact) {
1.1.1.7 root 591: oact->_sa_handler = tswapl(k->_sa_handler);
592: oact->sa_flags = tswapl(k->sa_flags);
1.1.1.6 root 593: #if !defined(TARGET_MIPS)
1.1.1.7 root 594: oact->sa_restorer = tswapl(k->sa_restorer);
1.1.1.6 root 595: #endif
1.1.1.7 root 596: oact->sa_mask = k->sa_mask;
1.1 root 597: }
598: if (act) {
1.1.1.7 root 599: /* FIXME: This is not threadsafe. */
600: k->_sa_handler = tswapl(act->_sa_handler);
601: k->sa_flags = tswapl(act->sa_flags);
1.1.1.6 root 602: #if !defined(TARGET_MIPS)
1.1.1.7 root 603: k->sa_restorer = tswapl(act->sa_restorer);
1.1.1.6 root 604: #endif
1.1.1.7 root 605: k->sa_mask = act->sa_mask;
1.1 root 606:
607: /* we update the host linux signal state */
608: host_sig = target_to_host_signal(sig);
609: if (host_sig != SIGSEGV && host_sig != SIGBUS) {
610: sigfillset(&act1.sa_mask);
611: act1.sa_flags = SA_SIGINFO;
1.1.1.7 root 612: if (k->sa_flags & TARGET_SA_RESTART)
1.1 root 613: act1.sa_flags |= SA_RESTART;
614: /* NOTE: it is important to update the host kernel signal
615: ignore state to avoid getting unexpected interrupted
616: syscalls */
1.1.1.7 root 617: if (k->_sa_handler == TARGET_SIG_IGN) {
1.1 root 618: act1.sa_sigaction = (void *)SIG_IGN;
1.1.1.7 root 619: } else if (k->_sa_handler == TARGET_SIG_DFL) {
620: if (fatal_signal (sig))
621: act1.sa_sigaction = host_signal_handler;
622: else
623: act1.sa_sigaction = (void *)SIG_DFL;
1.1 root 624: } else {
625: act1.sa_sigaction = host_signal_handler;
626: }
1.1.1.6 root 627: ret = sigaction(host_sig, &act1, NULL);
1.1 root 628: }
629: }
1.1.1.6 root 630: return ret;
1.1 root 631: }
632:
1.1.1.6 root 633: static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
1.1 root 634: const target_siginfo_t *info)
635: {
636: tswap_siginfo(tinfo, info);
637: return 0;
638: }
639:
1.1.1.6 root 640: static inline int current_exec_domain_sig(int sig)
641: {
642: return /* current->exec_domain && current->exec_domain->signal_invmap
643: && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
644: }
645:
646: #if defined(TARGET_I386) && TARGET_ABI_BITS == 32
1.1 root 647:
648: /* from the Linux kernel */
649:
650: struct target_fpreg {
651: uint16_t significand[4];
652: uint16_t exponent;
653: };
654:
655: struct target_fpxreg {
656: uint16_t significand[4];
657: uint16_t exponent;
658: uint16_t padding[3];
659: };
660:
661: struct target_xmmreg {
1.1.1.6 root 662: abi_ulong element[4];
1.1 root 663: };
664:
665: struct target_fpstate {
666: /* Regular FPU environment */
1.1.1.6 root 667: abi_ulong cw;
668: abi_ulong sw;
669: abi_ulong tag;
670: abi_ulong ipoff;
671: abi_ulong cssel;
672: abi_ulong dataoff;
673: abi_ulong datasel;
1.1 root 674: struct target_fpreg _st[8];
675: uint16_t status;
676: uint16_t magic; /* 0xffff = regular FPU data only */
677:
678: /* FXSR FPU environment */
1.1.1.6 root 679: abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
680: abi_ulong mxcsr;
681: abi_ulong reserved;
1.1 root 682: struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
683: struct target_xmmreg _xmm[8];
1.1.1.6 root 684: abi_ulong padding[56];
1.1 root 685: };
686:
687: #define X86_FXSR_MAGIC 0x0000
688:
689: struct target_sigcontext {
690: uint16_t gs, __gsh;
691: uint16_t fs, __fsh;
692: uint16_t es, __esh;
693: uint16_t ds, __dsh;
1.1.1.6 root 694: abi_ulong edi;
695: abi_ulong esi;
696: abi_ulong ebp;
697: abi_ulong esp;
698: abi_ulong ebx;
699: abi_ulong edx;
700: abi_ulong ecx;
701: abi_ulong eax;
702: abi_ulong trapno;
703: abi_ulong err;
704: abi_ulong eip;
1.1 root 705: uint16_t cs, __csh;
1.1.1.6 root 706: abi_ulong eflags;
707: abi_ulong esp_at_signal;
1.1 root 708: uint16_t ss, __ssh;
1.1.1.6 root 709: abi_ulong fpstate; /* pointer */
710: abi_ulong oldmask;
711: abi_ulong cr2;
1.1 root 712: };
713:
714: struct target_ucontext {
1.1.1.6 root 715: abi_ulong tuc_flags;
716: abi_ulong tuc_link;
1.1 root 717: target_stack_t tuc_stack;
718: struct target_sigcontext tuc_mcontext;
719: target_sigset_t tuc_sigmask; /* mask last for extensibility */
720: };
721:
722: struct sigframe
723: {
1.1.1.6 root 724: abi_ulong pretcode;
1.1 root 725: int sig;
726: struct target_sigcontext sc;
727: struct target_fpstate fpstate;
1.1.1.6 root 728: abi_ulong extramask[TARGET_NSIG_WORDS-1];
1.1 root 729: char retcode[8];
730: };
731:
732: struct rt_sigframe
733: {
1.1.1.6 root 734: abi_ulong pretcode;
1.1 root 735: int sig;
1.1.1.6 root 736: abi_ulong pinfo;
737: abi_ulong puc;
1.1 root 738: struct target_siginfo info;
739: struct target_ucontext uc;
740: struct target_fpstate fpstate;
741: char retcode[8];
742: };
743:
744: /*
745: * Set up a signal frame.
746: */
747:
748: /* XXX: save x87 state */
749: static int
750: setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
1.1.1.6 root 751: CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr)
1.1 root 752: {
753: int err = 0;
1.1.1.6 root 754: uint16_t magic;
1.1 root 755:
1.1.1.6 root 756: /* already locked in setup_frame() */
1.1 root 757: err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
758: err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
759: err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
760: err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
761: err |= __put_user(env->regs[R_EDI], &sc->edi);
762: err |= __put_user(env->regs[R_ESI], &sc->esi);
763: err |= __put_user(env->regs[R_EBP], &sc->ebp);
764: err |= __put_user(env->regs[R_ESP], &sc->esp);
765: err |= __put_user(env->regs[R_EBX], &sc->ebx);
766: err |= __put_user(env->regs[R_EDX], &sc->edx);
767: err |= __put_user(env->regs[R_ECX], &sc->ecx);
768: err |= __put_user(env->regs[R_EAX], &sc->eax);
769: err |= __put_user(env->exception_index, &sc->trapno);
770: err |= __put_user(env->error_code, &sc->err);
771: err |= __put_user(env->eip, &sc->eip);
772: err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
773: err |= __put_user(env->eflags, &sc->eflags);
774: err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
775: err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
776:
1.1.1.6 root 777: cpu_x86_fsave(env, fpstate_addr, 1);
1.1 root 778: fpstate->status = fpstate->sw;
1.1.1.6 root 779: magic = 0xffff;
780: err |= __put_user(magic, &fpstate->magic);
781: err |= __put_user(fpstate_addr, &sc->fpstate);
1.1 root 782:
783: /* non-iBCS2 extensions.. */
784: err |= __put_user(mask, &sc->oldmask);
785: err |= __put_user(env->cr[2], &sc->cr2);
786: return err;
787: }
788:
789: /*
790: * Determine which stack to use..
791: */
792:
1.1.1.6 root 793: static inline abi_ulong
1.1.1.7 root 794: get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
1.1 root 795: {
796: unsigned long esp;
797:
798: /* Default to using normal stack */
799: esp = env->regs[R_ESP];
800: /* This is the X/Open sanctioned signal stack switching. */
1.1.1.7 root 801: if (ka->sa_flags & TARGET_SA_ONSTACK) {
1.1.1.6 root 802: if (sas_ss_flags(esp) == 0)
803: esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
804: }
1.1 root 805:
806: /* This is the legacy signal stack switching. */
1.1.1.6 root 807: else
1.1 root 808: if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
1.1.1.7 root 809: !(ka->sa_flags & TARGET_SA_RESTORER) &&
810: ka->sa_restorer) {
811: esp = (unsigned long) ka->sa_restorer;
1.1 root 812: }
1.1.1.6 root 813: return (esp - frame_size) & -8ul;
1.1 root 814: }
815:
1.1.1.6 root 816: /* compare linux/arch/i386/kernel/signal.c:setup_frame() */
1.1.1.7 root 817: static void setup_frame(int sig, struct target_sigaction *ka,
1.1 root 818: target_sigset_t *set, CPUX86State *env)
819: {
1.1.1.6 root 820: abi_ulong frame_addr;
1.1 root 821: struct sigframe *frame;
822: int i, err = 0;
823:
1.1.1.6 root 824: frame_addr = get_sigframe(ka, env, sizeof(*frame));
1.1 root 825:
1.1.1.6 root 826: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1.1 root 827: goto give_sigsegv;
1.1.1.6 root 828:
829: err |= __put_user(current_exec_domain_sig(sig),
1.1 root 830: &frame->sig);
831: if (err)
832: goto give_sigsegv;
833:
1.1.1.6 root 834: setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
835: frame_addr + offsetof(struct sigframe, fpstate));
1.1 root 836: if (err)
837: goto give_sigsegv;
838:
839: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
840: if (__put_user(set->sig[i], &frame->extramask[i - 1]))
841: goto give_sigsegv;
842: }
843:
844: /* Set up to return from userspace. If provided, use a stub
845: already in userspace. */
1.1.1.7 root 846: if (ka->sa_flags & TARGET_SA_RESTORER) {
847: err |= __put_user(ka->sa_restorer, &frame->pretcode);
1.1 root 848: } else {
1.1.1.6 root 849: uint16_t val16;
850: abi_ulong retcode_addr;
851: retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
852: err |= __put_user(retcode_addr, &frame->pretcode);
1.1 root 853: /* This is popl %eax ; movl $,%eax ; int $0x80 */
1.1.1.6 root 854: val16 = 0xb858;
855: err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
1.1 root 856: err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
1.1.1.6 root 857: val16 = 0x80cd;
858: err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
1.1 root 859: }
860:
861: if (err)
862: goto give_sigsegv;
863:
864: /* Set up registers for signal handler */
1.1.1.6 root 865: env->regs[R_ESP] = frame_addr;
1.1.1.7 root 866: env->eip = ka->_sa_handler;
1.1 root 867:
868: cpu_x86_load_seg(env, R_DS, __USER_DS);
869: cpu_x86_load_seg(env, R_ES, __USER_DS);
870: cpu_x86_load_seg(env, R_SS, __USER_DS);
871: cpu_x86_load_seg(env, R_CS, __USER_CS);
872: env->eflags &= ~TF_MASK;
873:
1.1.1.6 root 874: unlock_user_struct(frame, frame_addr, 1);
875:
1.1 root 876: return;
877:
878: give_sigsegv:
1.1.1.6 root 879: unlock_user_struct(frame, frame_addr, 1);
1.1 root 880: if (sig == TARGET_SIGSEGV)
1.1.1.7 root 881: ka->_sa_handler = TARGET_SIG_DFL;
1.1 root 882: force_sig(TARGET_SIGSEGV /* , current */);
883: }
884:
1.1.1.6 root 885: /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
1.1.1.7 root 886: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1 root 887: target_siginfo_t *info,
888: target_sigset_t *set, CPUX86State *env)
889: {
1.1.1.6 root 890: abi_ulong frame_addr, addr;
1.1 root 891: struct rt_sigframe *frame;
892: int i, err = 0;
893:
1.1.1.6 root 894: frame_addr = get_sigframe(ka, env, sizeof(*frame));
1.1 root 895:
1.1.1.6 root 896: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1.1 root 897: goto give_sigsegv;
898:
1.1.1.6 root 899: err |= __put_user(current_exec_domain_sig(sig),
1.1 root 900: &frame->sig);
1.1.1.6 root 901: addr = frame_addr + offsetof(struct rt_sigframe, info);
902: err |= __put_user(addr, &frame->pinfo);
903: addr = frame_addr + offsetof(struct rt_sigframe, uc);
904: err |= __put_user(addr, &frame->puc);
1.1 root 905: err |= copy_siginfo_to_user(&frame->info, info);
906: if (err)
907: goto give_sigsegv;
908:
909: /* Create the ucontext. */
910: err |= __put_user(0, &frame->uc.tuc_flags);
911: err |= __put_user(0, &frame->uc.tuc_link);
1.1.1.6 root 912: err |= __put_user(target_sigaltstack_used.ss_sp,
1.1 root 913: &frame->uc.tuc_stack.ss_sp);
1.1.1.6 root 914: err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
1.1 root 915: &frame->uc.tuc_stack.ss_flags);
1.1.1.6 root 916: err |= __put_user(target_sigaltstack_used.ss_size,
1.1 root 917: &frame->uc.tuc_stack.ss_size);
918: err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
1.1.1.6 root 919: env, set->sig[0],
920: frame_addr + offsetof(struct rt_sigframe, fpstate));
1.1 root 921: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
922: if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
923: goto give_sigsegv;
924: }
925:
926: /* Set up to return from userspace. If provided, use a stub
927: already in userspace. */
1.1.1.7 root 928: if (ka->sa_flags & TARGET_SA_RESTORER) {
929: err |= __put_user(ka->sa_restorer, &frame->pretcode);
1.1 root 930: } else {
1.1.1.6 root 931: uint16_t val16;
932: addr = frame_addr + offsetof(struct rt_sigframe, retcode);
933: err |= __put_user(addr, &frame->pretcode);
1.1 root 934: /* This is movl $,%eax ; int $0x80 */
1.1.1.6 root 935: err |= __put_user(0xb8, (char *)(frame->retcode+0));
1.1 root 936: err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
1.1.1.6 root 937: val16 = 0x80cd;
938: err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
1.1 root 939: }
940:
941: if (err)
942: goto give_sigsegv;
943:
944: /* Set up registers for signal handler */
1.1.1.6 root 945: env->regs[R_ESP] = frame_addr;
1.1.1.7 root 946: env->eip = ka->_sa_handler;
1.1 root 947:
948: cpu_x86_load_seg(env, R_DS, __USER_DS);
949: cpu_x86_load_seg(env, R_ES, __USER_DS);
950: cpu_x86_load_seg(env, R_SS, __USER_DS);
951: cpu_x86_load_seg(env, R_CS, __USER_CS);
952: env->eflags &= ~TF_MASK;
953:
1.1.1.6 root 954: unlock_user_struct(frame, frame_addr, 1);
955:
1.1 root 956: return;
957:
958: give_sigsegv:
1.1.1.6 root 959: unlock_user_struct(frame, frame_addr, 1);
1.1 root 960: if (sig == TARGET_SIGSEGV)
1.1.1.7 root 961: ka->_sa_handler = TARGET_SIG_DFL;
1.1 root 962: force_sig(TARGET_SIGSEGV /* , current */);
963: }
964:
965: static int
966: restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
967: {
968: unsigned int err = 0;
1.1.1.6 root 969: abi_ulong fpstate_addr;
970: unsigned int tmpflags;
1.1 root 971:
1.1.1.6 root 972: cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
973: cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
974: cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
975: cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
976:
977: env->regs[R_EDI] = tswapl(sc->edi);
978: env->regs[R_ESI] = tswapl(sc->esi);
979: env->regs[R_EBP] = tswapl(sc->ebp);
980: env->regs[R_ESP] = tswapl(sc->esp);
981: env->regs[R_EBX] = tswapl(sc->ebx);
982: env->regs[R_EDX] = tswapl(sc->edx);
983: env->regs[R_ECX] = tswapl(sc->ecx);
984: env->eip = tswapl(sc->eip);
1.1 root 985:
986: cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
987: cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
988:
1.1.1.6 root 989: tmpflags = tswapl(sc->eflags);
990: env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
991: // regs->orig_eax = -1; /* disable syscall checks */
992:
993: fpstate_addr = tswapl(sc->fpstate);
994: if (fpstate_addr != 0) {
995: if (!access_ok(VERIFY_READ, fpstate_addr,
996: sizeof(struct target_fpstate)))
997: goto badframe;
998: cpu_x86_frstor(env, fpstate_addr, 1);
1.1 root 999: }
1000:
1.1.1.6 root 1001: *peax = tswapl(sc->eax);
1.1 root 1002: return err;
1003: badframe:
1004: return 1;
1005: }
1006:
1007: long do_sigreturn(CPUX86State *env)
1008: {
1.1.1.6 root 1009: struct sigframe *frame;
1010: abi_ulong frame_addr = env->regs[R_ESP] - 8;
1.1 root 1011: target_sigset_t target_set;
1012: sigset_t set;
1013: int eax, i;
1014:
1015: #if defined(DEBUG_SIGNAL)
1016: fprintf(stderr, "do_sigreturn\n");
1017: #endif
1.1.1.6 root 1018: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1019: goto badframe;
1.1 root 1020: /* set blocked signals */
1021: if (__get_user(target_set.sig[0], &frame->sc.oldmask))
1022: goto badframe;
1023: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1024: if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
1025: goto badframe;
1026: }
1027:
1028: target_to_host_sigset_internal(&set, &target_set);
1029: sigprocmask(SIG_SETMASK, &set, NULL);
1.1.1.6 root 1030:
1.1 root 1031: /* restore registers */
1032: if (restore_sigcontext(env, &frame->sc, &eax))
1033: goto badframe;
1.1.1.6 root 1034: unlock_user_struct(frame, frame_addr, 0);
1.1 root 1035: return eax;
1036:
1037: badframe:
1.1.1.6 root 1038: unlock_user_struct(frame, frame_addr, 0);
1.1 root 1039: force_sig(TARGET_SIGSEGV);
1040: return 0;
1041: }
1042:
1043: long do_rt_sigreturn(CPUX86State *env)
1044: {
1.1.1.6 root 1045: abi_ulong frame_addr;
1046: struct rt_sigframe *frame;
1.1 root 1047: sigset_t set;
1048: int eax;
1049:
1.1.1.6 root 1050: frame_addr = env->regs[R_ESP] - 4;
1051: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1052: goto badframe;
1.1 root 1053: target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
1054: sigprocmask(SIG_SETMASK, &set, NULL);
1.1.1.6 root 1055:
1.1 root 1056: if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
1057: goto badframe;
1058:
1.1.1.6 root 1059: if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
1060: get_sp_from_cpustate(env)) == -EFAULT)
1.1 root 1061: goto badframe;
1.1.1.6 root 1062:
1063: unlock_user_struct(frame, frame_addr, 0);
1.1 root 1064: return eax;
1065:
1066: badframe:
1.1.1.6 root 1067: unlock_user_struct(frame, frame_addr, 0);
1068: force_sig(TARGET_SIGSEGV);
1.1 root 1069: return 0;
1070: }
1071:
1072: #elif defined(TARGET_ARM)
1073:
1074: struct target_sigcontext {
1.1.1.6 root 1075: abi_ulong trap_no;
1076: abi_ulong error_code;
1077: abi_ulong oldmask;
1078: abi_ulong arm_r0;
1079: abi_ulong arm_r1;
1080: abi_ulong arm_r2;
1081: abi_ulong arm_r3;
1082: abi_ulong arm_r4;
1083: abi_ulong arm_r5;
1084: abi_ulong arm_r6;
1085: abi_ulong arm_r7;
1086: abi_ulong arm_r8;
1087: abi_ulong arm_r9;
1088: abi_ulong arm_r10;
1089: abi_ulong arm_fp;
1090: abi_ulong arm_ip;
1091: abi_ulong arm_sp;
1092: abi_ulong arm_lr;
1093: abi_ulong arm_pc;
1094: abi_ulong arm_cpsr;
1095: abi_ulong fault_address;
1096: };
1.1 root 1097:
1.1.1.7 root 1098: struct target_ucontext_v1 {
1.1.1.6 root 1099: abi_ulong tuc_flags;
1100: abi_ulong tuc_link;
1.1 root 1101: target_stack_t tuc_stack;
1102: struct target_sigcontext tuc_mcontext;
1103: target_sigset_t tuc_sigmask; /* mask last for extensibility */
1104: };
1105:
1.1.1.7 root 1106: struct target_ucontext_v2 {
1107: abi_ulong tuc_flags;
1108: abi_ulong tuc_link;
1109: target_stack_t tuc_stack;
1110: struct target_sigcontext tuc_mcontext;
1111: target_sigset_t tuc_sigmask; /* mask last for extensibility */
1112: char __unused[128 - sizeof(sigset_t)];
1113: abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
1114: };
1115:
1116: struct sigframe_v1
1.1 root 1117: {
1118: struct target_sigcontext sc;
1.1.1.6 root 1119: abi_ulong extramask[TARGET_NSIG_WORDS-1];
1120: abi_ulong retcode;
1.1 root 1121: };
1122:
1.1.1.7 root 1123: struct sigframe_v2
1124: {
1125: struct target_ucontext_v2 uc;
1126: abi_ulong retcode;
1127: };
1128:
1129: struct rt_sigframe_v1
1.1 root 1130: {
1.1.1.6 root 1131: abi_ulong pinfo;
1132: abi_ulong puc;
1.1 root 1133: struct target_siginfo info;
1.1.1.7 root 1134: struct target_ucontext_v1 uc;
1135: abi_ulong retcode;
1136: };
1137:
1138: struct rt_sigframe_v2
1139: {
1140: struct target_siginfo info;
1141: struct target_ucontext_v2 uc;
1.1.1.6 root 1142: abi_ulong retcode;
1.1 root 1143: };
1144:
1145: #define TARGET_CONFIG_CPU_32 1
1146:
1147: /*
1148: * For ARM syscalls, we encode the syscall number into the instruction.
1149: */
1150: #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
1151: #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
1152:
1153: /*
1154: * For Thumb syscalls, we pass the syscall number via r7. We therefore
1155: * need two 16-bit instructions.
1156: */
1157: #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
1158: #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
1159:
1.1.1.6 root 1160: static const abi_ulong retcodes[4] = {
1.1 root 1161: SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
1162: SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
1163: };
1164:
1165:
1166: #define __get_user_error(x,p,e) __get_user(x, p)
1167:
1168: static inline int valid_user_regs(CPUState *regs)
1169: {
1170: return 1;
1171: }
1172:
1.1.1.7 root 1173: static void
1.1 root 1174: setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1.1.1.6 root 1175: CPUState *env, abi_ulong mask)
1.1 root 1176: {
1.1.1.7 root 1177: __put_user(env->regs[0], &sc->arm_r0);
1178: __put_user(env->regs[1], &sc->arm_r1);
1179: __put_user(env->regs[2], &sc->arm_r2);
1180: __put_user(env->regs[3], &sc->arm_r3);
1181: __put_user(env->regs[4], &sc->arm_r4);
1182: __put_user(env->regs[5], &sc->arm_r5);
1183: __put_user(env->regs[6], &sc->arm_r6);
1184: __put_user(env->regs[7], &sc->arm_r7);
1185: __put_user(env->regs[8], &sc->arm_r8);
1186: __put_user(env->regs[9], &sc->arm_r9);
1187: __put_user(env->regs[10], &sc->arm_r10);
1188: __put_user(env->regs[11], &sc->arm_fp);
1189: __put_user(env->regs[12], &sc->arm_ip);
1190: __put_user(env->regs[13], &sc->arm_sp);
1191: __put_user(env->regs[14], &sc->arm_lr);
1192: __put_user(env->regs[15], &sc->arm_pc);
1.1 root 1193: #ifdef TARGET_CONFIG_CPU_32
1.1.1.7 root 1194: __put_user(cpsr_read(env), &sc->arm_cpsr);
1.1 root 1195: #endif
1196:
1.1.1.7 root 1197: __put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
1198: __put_user(/* current->thread.error_code */ 0, &sc->error_code);
1199: __put_user(/* current->thread.address */ 0, &sc->fault_address);
1200: __put_user(mask, &sc->oldmask);
1.1 root 1201: }
1202:
1.1.1.6 root 1203: static inline abi_ulong
1.1.1.7 root 1204: get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize)
1.1 root 1205: {
1206: unsigned long sp = regs->regs[13];
1207:
1208: /*
1209: * This is the X/Open sanctioned signal stack switching.
1210: */
1.1.1.7 root 1211: if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
1.1.1.6 root 1212: sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1.1 root 1213: /*
1214: * ATPCS B01 mandates 8-byte alignment
1215: */
1.1.1.6 root 1216: return (sp - framesize) & ~7;
1.1 root 1217: }
1218:
1219: static int
1.1.1.7 root 1220: setup_return(CPUState *env, struct target_sigaction *ka,
1.1.1.6 root 1221: abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
1.1 root 1222: {
1.1.1.7 root 1223: abi_ulong handler = ka->_sa_handler;
1.1.1.6 root 1224: abi_ulong retcode;
1.1.1.7 root 1225: int thumb = handler & 1;
1.1 root 1226:
1.1.1.7 root 1227: if (ka->sa_flags & TARGET_SA_RESTORER) {
1228: retcode = ka->sa_restorer;
1.1 root 1229: } else {
1230: unsigned int idx = thumb;
1231:
1.1.1.7 root 1232: if (ka->sa_flags & TARGET_SA_SIGINFO)
1.1 root 1233: idx += 2;
1234:
1235: if (__put_user(retcodes[idx], rc))
1236: return 1;
1237: #if 0
1.1.1.6 root 1238: flush_icache_range((abi_ulong)rc,
1239: (abi_ulong)(rc + 1));
1.1 root 1240: #endif
1.1.1.6 root 1241: retcode = rc_addr + thumb;
1.1 root 1242: }
1243:
1244: env->regs[0] = usig;
1.1.1.6 root 1245: env->regs[13] = frame_addr;
1.1 root 1246: env->regs[14] = retcode;
1247: env->regs[15] = handler & (thumb ? ~1 : ~3);
1.1.1.7 root 1248: env->thumb = thumb;
1.1 root 1249:
1.1.1.2 root 1250: #if 0
1.1 root 1251: #ifdef TARGET_CONFIG_CPU_32
1252: env->cpsr = cpsr;
1253: #endif
1.1.1.2 root 1254: #endif
1.1 root 1255:
1256: return 0;
1257: }
1258:
1.1.1.7 root 1259: static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
1260: target_sigset_t *set, CPUState *env)
1261: {
1262: struct target_sigaltstack stack;
1263: int i;
1264:
1265: /* Clear all the bits of the ucontext we don't use. */
1266: memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
1267:
1268: memset(&stack, 0, sizeof(stack));
1269: __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1270: __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1271: __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1272: memcpy(&uc->tuc_stack, &stack, sizeof(stack));
1273:
1274: setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
1275: /* FIXME: Save coprocessor signal frame. */
1276: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1277: __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
1278: }
1279: }
1280:
1.1.1.6 root 1281: /* compare linux/arch/arm/kernel/signal.c:setup_frame() */
1.1.1.7 root 1282: static void setup_frame_v1(int usig, struct target_sigaction *ka,
1283: target_sigset_t *set, CPUState *regs)
1.1 root 1284: {
1.1.1.7 root 1285: struct sigframe_v1 *frame;
1.1.1.6 root 1286: abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1.1.1.7 root 1287: int i;
1.1 root 1288:
1.1.1.6 root 1289: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1290: return;
1291:
1.1.1.7 root 1292: setup_sigcontext(&frame->sc, regs, set->sig[0]);
1.1 root 1293:
1294: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1295: if (__put_user(set->sig[i], &frame->extramask[i - 1]))
1.1.1.6 root 1296: goto end;
1.1 root 1297: }
1298:
1.1.1.7 root 1299: setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1300: frame_addr + offsetof(struct sigframe_v1, retcode));
1.1.1.6 root 1301:
1302: end:
1303: unlock_user_struct(frame, frame_addr, 1);
1.1.1.7 root 1304: }
1305:
1306: static void setup_frame_v2(int usig, struct target_sigaction *ka,
1307: target_sigset_t *set, CPUState *regs)
1308: {
1309: struct sigframe_v2 *frame;
1310: abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1311:
1312: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1313: return;
1314:
1315: setup_sigframe_v2(&frame->uc, set, regs);
1316:
1317: setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1318: frame_addr + offsetof(struct sigframe_v2, retcode));
1319:
1320: unlock_user_struct(frame, frame_addr, 1);
1321: }
1322:
1323: static void setup_frame(int usig, struct target_sigaction *ka,
1324: target_sigset_t *set, CPUState *regs)
1325: {
1326: if (get_osversion() >= 0x020612) {
1327: setup_frame_v2(usig, ka, set, regs);
1328: } else {
1329: setup_frame_v1(usig, ka, set, regs);
1330: }
1.1 root 1331: }
1332:
1.1.1.6 root 1333: /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
1.1.1.7 root 1334: static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
1335: target_siginfo_t *info,
1336: target_sigset_t *set, CPUState *env)
1.1 root 1337: {
1.1.1.7 root 1338: struct rt_sigframe_v1 *frame;
1.1.1.6 root 1339: abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1340: struct target_sigaltstack stack;
1.1.1.7 root 1341: int i;
1.1.1.6 root 1342: abi_ulong info_addr, uc_addr;
1.1 root 1343:
1.1.1.6 root 1344: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1.1 root 1345: return /* 1 */;
1346:
1.1.1.7 root 1347: info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
1348: __put_user(info_addr, &frame->pinfo);
1349: uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
1350: __put_user(uc_addr, &frame->puc);
1351: copy_siginfo_to_user(&frame->info, info);
1.1 root 1352:
1353: /* Clear all the bits of the ucontext we don't use. */
1.1.1.7 root 1354: memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
1.1 root 1355:
1.1.1.6 root 1356: memset(&stack, 0, sizeof(stack));
1357: __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1358: __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1359: __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1360: memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
1361:
1.1.1.7 root 1362: setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
1.1 root 1363: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1364: if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
1.1.1.6 root 1365: goto end;
1.1 root 1366: }
1367:
1.1.1.7 root 1368: setup_return(env, ka, &frame->retcode, frame_addr, usig,
1369: frame_addr + offsetof(struct rt_sigframe_v1, retcode));
1370:
1371: env->regs[1] = info_addr;
1372: env->regs[2] = uc_addr;
1.1 root 1373:
1.1.1.6 root 1374: end:
1375: unlock_user_struct(frame, frame_addr, 1);
1.1.1.7 root 1376: }
1377:
1378: static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
1379: target_siginfo_t *info,
1380: target_sigset_t *set, CPUState *env)
1381: {
1382: struct rt_sigframe_v2 *frame;
1383: abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1384: abi_ulong info_addr, uc_addr;
1385:
1386: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1387: return /* 1 */;
1388:
1389: info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
1390: uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
1391: copy_siginfo_to_user(&frame->info, info);
1392:
1393: setup_sigframe_v2(&frame->uc, set, env);
1394:
1395: setup_return(env, ka, &frame->retcode, frame_addr, usig,
1396: frame_addr + offsetof(struct rt_sigframe_v2, retcode));
1397:
1398: env->regs[1] = info_addr;
1399: env->regs[2] = uc_addr;
1400:
1401: unlock_user_struct(frame, frame_addr, 1);
1402: }
1.1.1.6 root 1403:
1.1.1.7 root 1404: static void setup_rt_frame(int usig, struct target_sigaction *ka,
1405: target_siginfo_t *info,
1406: target_sigset_t *set, CPUState *env)
1407: {
1408: if (get_osversion() >= 0x020612) {
1409: setup_rt_frame_v2(usig, ka, info, set, env);
1410: } else {
1411: setup_rt_frame_v1(usig, ka, info, set, env);
1412: }
1.1 root 1413: }
1414:
1415: static int
1416: restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
1417: {
1418: int err = 0;
1.1.1.2 root 1419: uint32_t cpsr;
1.1 root 1420:
1421: __get_user_error(env->regs[0], &sc->arm_r0, err);
1422: __get_user_error(env->regs[1], &sc->arm_r1, err);
1423: __get_user_error(env->regs[2], &sc->arm_r2, err);
1424: __get_user_error(env->regs[3], &sc->arm_r3, err);
1425: __get_user_error(env->regs[4], &sc->arm_r4, err);
1426: __get_user_error(env->regs[5], &sc->arm_r5, err);
1427: __get_user_error(env->regs[6], &sc->arm_r6, err);
1428: __get_user_error(env->regs[7], &sc->arm_r7, err);
1429: __get_user_error(env->regs[8], &sc->arm_r8, err);
1430: __get_user_error(env->regs[9], &sc->arm_r9, err);
1431: __get_user_error(env->regs[10], &sc->arm_r10, err);
1432: __get_user_error(env->regs[11], &sc->arm_fp, err);
1433: __get_user_error(env->regs[12], &sc->arm_ip, err);
1434: __get_user_error(env->regs[13], &sc->arm_sp, err);
1435: __get_user_error(env->regs[14], &sc->arm_lr, err);
1436: __get_user_error(env->regs[15], &sc->arm_pc, err);
1437: #ifdef TARGET_CONFIG_CPU_32
1.1.1.2 root 1438: __get_user_error(cpsr, &sc->arm_cpsr, err);
1.1.1.7 root 1439: cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC);
1.1 root 1440: #endif
1441:
1442: err |= !valid_user_regs(env);
1443:
1444: return err;
1445: }
1446:
1.1.1.7 root 1447: static long do_sigreturn_v1(CPUState *env)
1.1 root 1448: {
1.1.1.6 root 1449: abi_ulong frame_addr;
1.1.1.7 root 1450: struct sigframe_v1 *frame;
1.1 root 1451: target_sigset_t set;
1452: sigset_t host_set;
1453: int i;
1454:
1455: /*
1456: * Since we stacked the signal on a 64-bit boundary,
1457: * then 'sp' should be word aligned here. If it's
1458: * not, then the user is trying to mess with us.
1459: */
1460: if (env->regs[13] & 7)
1461: goto badframe;
1462:
1.1.1.6 root 1463: frame_addr = env->regs[13];
1464: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1465: goto badframe;
1.1 root 1466:
1467: if (__get_user(set.sig[0], &frame->sc.oldmask))
1468: goto badframe;
1469: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1470: if (__get_user(set.sig[i], &frame->extramask[i - 1]))
1471: goto badframe;
1472: }
1473:
1474: target_to_host_sigset_internal(&host_set, &set);
1475: sigprocmask(SIG_SETMASK, &host_set, NULL);
1476:
1477: if (restore_sigcontext(env, &frame->sc))
1478: goto badframe;
1479:
1480: #if 0
1481: /* Send SIGTRAP if we're single-stepping */
1482: if (ptrace_cancel_bpt(current))
1483: send_sig(SIGTRAP, current, 1);
1484: #endif
1.1.1.6 root 1485: unlock_user_struct(frame, frame_addr, 0);
1486: return env->regs[0];
1.1 root 1487:
1488: badframe:
1.1.1.6 root 1489: unlock_user_struct(frame, frame_addr, 0);
1.1 root 1490: force_sig(SIGSEGV /* , current */);
1491: return 0;
1492: }
1493:
1.1.1.7 root 1494: static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr,
1495: struct target_ucontext_v2 *uc)
1496: {
1497: sigset_t host_set;
1498:
1499: target_to_host_sigset(&host_set, &uc->tuc_sigmask);
1500: sigprocmask(SIG_SETMASK, &host_set, NULL);
1501:
1502: if (restore_sigcontext(env, &uc->tuc_mcontext))
1503: return 1;
1504:
1505: if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1506: return 1;
1507:
1508: #if 0
1509: /* Send SIGTRAP if we're single-stepping */
1510: if (ptrace_cancel_bpt(current))
1511: send_sig(SIGTRAP, current, 1);
1512: #endif
1513:
1514: return 0;
1515: }
1516:
1517: static long do_sigreturn_v2(CPUState *env)
1.1 root 1518: {
1.1.1.6 root 1519: abi_ulong frame_addr;
1.1.1.7 root 1520: struct sigframe_v2 *frame;
1521:
1522: /*
1523: * Since we stacked the signal on a 64-bit boundary,
1524: * then 'sp' should be word aligned here. If it's
1525: * not, then the user is trying to mess with us.
1526: */
1527: if (env->regs[13] & 7)
1528: goto badframe;
1529:
1530: frame_addr = env->regs[13];
1531: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1532: goto badframe;
1533:
1534: if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1535: goto badframe;
1536:
1537: unlock_user_struct(frame, frame_addr, 0);
1538: return env->regs[0];
1539:
1540: badframe:
1541: unlock_user_struct(frame, frame_addr, 0);
1542: force_sig(SIGSEGV /* , current */);
1543: return 0;
1544: }
1545:
1546: long do_sigreturn(CPUState *env)
1547: {
1548: if (get_osversion() >= 0x020612) {
1549: return do_sigreturn_v2(env);
1550: } else {
1551: return do_sigreturn_v1(env);
1552: }
1553: }
1554:
1555: static long do_rt_sigreturn_v1(CPUState *env)
1556: {
1557: abi_ulong frame_addr;
1558: struct rt_sigframe_v1 *frame;
1.1 root 1559: sigset_t host_set;
1560:
1561: /*
1562: * Since we stacked the signal on a 64-bit boundary,
1563: * then 'sp' should be word aligned here. If it's
1564: * not, then the user is trying to mess with us.
1565: */
1566: if (env->regs[13] & 7)
1567: goto badframe;
1568:
1.1.1.6 root 1569: frame_addr = env->regs[13];
1570: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1571: goto badframe;
1.1 root 1572:
1573: target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
1574: sigprocmask(SIG_SETMASK, &host_set, NULL);
1575:
1576: if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
1577: goto badframe;
1578:
1.1.1.7 root 1579: if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1.1.1.6 root 1580: goto badframe;
1581:
1.1 root 1582: #if 0
1583: /* Send SIGTRAP if we're single-stepping */
1584: if (ptrace_cancel_bpt(current))
1585: send_sig(SIGTRAP, current, 1);
1586: #endif
1.1.1.6 root 1587: unlock_user_struct(frame, frame_addr, 0);
1.1 root 1588: return env->regs[0];
1589:
1590: badframe:
1.1.1.6 root 1591: unlock_user_struct(frame, frame_addr, 0);
1.1 root 1592: force_sig(SIGSEGV /* , current */);
1593: return 0;
1594: }
1595:
1.1.1.7 root 1596: static long do_rt_sigreturn_v2(CPUState *env)
1597: {
1598: abi_ulong frame_addr;
1599: struct rt_sigframe_v2 *frame;
1600:
1601: /*
1602: * Since we stacked the signal on a 64-bit boundary,
1603: * then 'sp' should be word aligned here. If it's
1604: * not, then the user is trying to mess with us.
1605: */
1606: if (env->regs[13] & 7)
1607: goto badframe;
1608:
1609: frame_addr = env->regs[13];
1610: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1611: goto badframe;
1612:
1613: if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1614: goto badframe;
1615:
1616: unlock_user_struct(frame, frame_addr, 0);
1617: return env->regs[0];
1618:
1619: badframe:
1620: unlock_user_struct(frame, frame_addr, 0);
1621: force_sig(SIGSEGV /* , current */);
1622: return 0;
1623: }
1624:
1625: long do_rt_sigreturn(CPUState *env)
1626: {
1627: if (get_osversion() >= 0x020612) {
1628: return do_rt_sigreturn_v2(env);
1629: } else {
1630: return do_rt_sigreturn_v1(env);
1631: }
1632: }
1633:
1.1 root 1634: #elif defined(TARGET_SPARC)
1635:
1636: #define __SUNOS_MAXWIN 31
1637:
1638: /* This is what SunOS does, so shall I. */
1639: struct target_sigcontext {
1.1.1.6 root 1640: abi_ulong sigc_onstack; /* state to restore */
1.1 root 1641:
1.1.1.6 root 1642: abi_ulong sigc_mask; /* sigmask to restore */
1643: abi_ulong sigc_sp; /* stack pointer */
1644: abi_ulong sigc_pc; /* program counter */
1645: abi_ulong sigc_npc; /* next program counter */
1646: abi_ulong sigc_psr; /* for condition codes etc */
1647: abi_ulong sigc_g1; /* User uses these two registers */
1648: abi_ulong sigc_o0; /* within the trampoline code. */
1.1 root 1649:
1650: /* Now comes information regarding the users window set
1651: * at the time of the signal.
1652: */
1.1.1.6 root 1653: abi_ulong sigc_oswins; /* outstanding windows */
1.1 root 1654:
1655: /* stack ptrs for each regwin buf */
1656: char *sigc_spbuf[__SUNOS_MAXWIN];
1657:
1658: /* Windows to restore after signal */
1659: struct {
1.1.1.6 root 1660: abi_ulong locals[8];
1661: abi_ulong ins[8];
1.1 root 1662: } sigc_wbuf[__SUNOS_MAXWIN];
1663: };
1664: /* A Sparc stack frame */
1665: struct sparc_stackf {
1.1.1.6 root 1666: abi_ulong locals[8];
1667: abi_ulong ins[6];
1.1 root 1668: struct sparc_stackf *fp;
1.1.1.6 root 1669: abi_ulong callers_pc;
1.1 root 1670: char *structptr;
1.1.1.6 root 1671: abi_ulong xargs[6];
1672: abi_ulong xxargs[1];
1.1 root 1673: };
1674:
1675: typedef struct {
1676: struct {
1.1.1.6 root 1677: abi_ulong psr;
1678: abi_ulong pc;
1679: abi_ulong npc;
1680: abi_ulong y;
1681: abi_ulong u_regs[16]; /* globals and ins */
1.1 root 1682: } si_regs;
1683: int si_mask;
1684: } __siginfo_t;
1685:
1686: typedef struct {
1687: unsigned long si_float_regs [32];
1688: unsigned long si_fsr;
1689: unsigned long si_fpqdepth;
1690: struct {
1691: unsigned long *insn_addr;
1692: unsigned long insn;
1693: } si_fpqueue [16];
1.1.1.4 root 1694: } qemu_siginfo_fpu_t;
1.1 root 1695:
1696:
1697: struct target_signal_frame {
1698: struct sparc_stackf ss;
1699: __siginfo_t info;
1.1.1.6 root 1700: abi_ulong fpu_save;
1701: abi_ulong insns[2] __attribute__ ((aligned (8)));
1702: abi_ulong extramask[TARGET_NSIG_WORDS - 1];
1703: abi_ulong extra_size; /* Should be 0 */
1.1.1.4 root 1704: qemu_siginfo_fpu_t fpu_state;
1.1 root 1705: };
1706: struct target_rt_signal_frame {
1707: struct sparc_stackf ss;
1708: siginfo_t info;
1.1.1.6 root 1709: abi_ulong regs[20];
1.1 root 1710: sigset_t mask;
1.1.1.6 root 1711: abi_ulong fpu_save;
1.1 root 1712: unsigned int insns[2];
1713: stack_t stack;
1714: unsigned int extra_size; /* Should be 0 */
1.1.1.4 root 1715: qemu_siginfo_fpu_t fpu_state;
1.1 root 1716: };
1717:
1718: #define UREG_O0 16
1719: #define UREG_O6 22
1720: #define UREG_I0 0
1721: #define UREG_I1 1
1722: #define UREG_I2 2
1.1.1.6 root 1723: #define UREG_I3 3
1724: #define UREG_I4 4
1725: #define UREG_I5 5
1.1 root 1726: #define UREG_I6 6
1727: #define UREG_I7 7
1728: #define UREG_L0 8
1729: #define UREG_FP UREG_I6
1730: #define UREG_SP UREG_O6
1731:
1.1.1.7 root 1732: static inline abi_ulong get_sigframe(struct target_sigaction *sa,
1.1.1.6 root 1733: CPUState *env, unsigned long framesize)
1.1 root 1734: {
1.1.1.6 root 1735: abi_ulong sp;
1.1 root 1736:
1737: sp = env->regwptr[UREG_FP];
1738:
1739: /* This is the X/Open sanctioned signal stack switching. */
1.1.1.7 root 1740: if (sa->sa_flags & TARGET_SA_ONSTACK) {
1.1.1.6 root 1741: if (!on_sig_stack(sp)
1742: && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
1743: sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1.1 root 1744: }
1.1.1.6 root 1745: return sp - framesize;
1.1 root 1746: }
1747:
1748: static int
1.1.1.6 root 1749: setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask)
1.1 root 1750: {
1751: int err = 0, i;
1752:
1753: err |= __put_user(env->psr, &si->si_regs.psr);
1754: err |= __put_user(env->pc, &si->si_regs.pc);
1755: err |= __put_user(env->npc, &si->si_regs.npc);
1756: err |= __put_user(env->y, &si->si_regs.y);
1757: for (i=0; i < 8; i++) {
1758: err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
1759: }
1760: for (i=0; i < 8; i++) {
1761: err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
1762: }
1763: err |= __put_user(mask, &si->si_mask);
1764: return err;
1765: }
1766:
1767: #if 0
1768: static int
1769: setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1770: CPUState *env, unsigned long mask)
1771: {
1772: int err = 0;
1773:
1774: err |= __put_user(mask, &sc->sigc_mask);
1775: err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
1776: err |= __put_user(env->pc, &sc->sigc_pc);
1777: err |= __put_user(env->npc, &sc->sigc_npc);
1778: err |= __put_user(env->psr, &sc->sigc_psr);
1779: err |= __put_user(env->gregs[1], &sc->sigc_g1);
1780: err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
1781:
1782: return err;
1783: }
1784: #endif
1785: #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
1786:
1.1.1.7 root 1787: static void setup_frame(int sig, struct target_sigaction *ka,
1.1 root 1788: target_sigset_t *set, CPUState *env)
1789: {
1.1.1.6 root 1790: abi_ulong sf_addr;
1.1 root 1791: struct target_signal_frame *sf;
1792: int sigframe_size, err, i;
1793:
1794: /* 1. Make sure everything is clean */
1795: //synchronize_user_stack();
1796:
1797: sigframe_size = NF_ALIGNEDSZ;
1.1.1.6 root 1798: sf_addr = get_sigframe(ka, env, sigframe_size);
1.1 root 1799:
1.1.1.6 root 1800: sf = lock_user(VERIFY_WRITE, sf_addr,
1801: sizeof(struct target_signal_frame), 0);
1802: if (!sf)
1803: goto sigsegv;
1804:
1.1 root 1805: //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1806: #if 0
1807: if (invalid_frame_pointer(sf, sigframe_size))
1808: goto sigill_and_return;
1809: #endif
1810: /* 2. Save the current process state */
1811: err = setup___siginfo(&sf->info, env, set->sig[0]);
1812: err |= __put_user(0, &sf->extra_size);
1813:
1814: //err |= save_fpu_state(regs, &sf->fpu_state);
1815: //err |= __put_user(&sf->fpu_state, &sf->fpu_save);
1816:
1817: err |= __put_user(set->sig[0], &sf->info.si_mask);
1818: for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
1819: err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
1820: }
1821:
1822: for (i = 0; i < 8; i++) {
1823: err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
1824: }
1825: for (i = 0; i < 8; i++) {
1826: err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
1827: }
1828: if (err)
1829: goto sigsegv;
1830:
1831: /* 3. signal handler back-trampoline and parameters */
1.1.1.6 root 1832: env->regwptr[UREG_FP] = sf_addr;
1.1 root 1833: env->regwptr[UREG_I0] = sig;
1.1.1.6 root 1834: env->regwptr[UREG_I1] = sf_addr +
1835: offsetof(struct target_signal_frame, info);
1836: env->regwptr[UREG_I2] = sf_addr +
1837: offsetof(struct target_signal_frame, info);
1.1 root 1838:
1839: /* 4. signal handler */
1.1.1.7 root 1840: env->pc = ka->_sa_handler;
1.1 root 1841: env->npc = (env->pc + 4);
1842: /* 5. return to kernel instructions */
1.1.1.7 root 1843: if (ka->sa_restorer)
1844: env->regwptr[UREG_I7] = ka->sa_restorer;
1.1 root 1845: else {
1.1.1.6 root 1846: uint32_t val32;
1847:
1848: env->regwptr[UREG_I7] = sf_addr +
1849: offsetof(struct target_signal_frame, insns) - 2 * 4;
1.1 root 1850:
1851: /* mov __NR_sigreturn, %g1 */
1.1.1.6 root 1852: val32 = 0x821020d8;
1853: err |= __put_user(val32, &sf->insns[0]);
1.1 root 1854:
1855: /* t 0x10 */
1.1.1.6 root 1856: val32 = 0x91d02010;
1857: err |= __put_user(val32, &sf->insns[1]);
1.1 root 1858: if (err)
1859: goto sigsegv;
1860:
1861: /* Flush instruction space. */
1862: //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
1863: // tb_flush(env);
1864: }
1.1.1.6 root 1865: unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
1.1 root 1866: return;
1.1.1.6 root 1867: #if 0
1868: sigill_and_return:
1.1 root 1869: force_sig(TARGET_SIGILL);
1.1.1.6 root 1870: #endif
1.1 root 1871: sigsegv:
1872: //fprintf(stderr, "force_sig\n");
1.1.1.6 root 1873: unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
1.1 root 1874: force_sig(TARGET_SIGSEGV);
1875: }
1876: static inline int
1.1.1.4 root 1877: restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu)
1.1 root 1878: {
1879: int err;
1880: #if 0
1881: #ifdef CONFIG_SMP
1882: if (current->flags & PF_USEDFPU)
1883: regs->psr &= ~PSR_EF;
1884: #else
1885: if (current == last_task_used_math) {
1886: last_task_used_math = 0;
1887: regs->psr &= ~PSR_EF;
1888: }
1889: #endif
1890: current->used_math = 1;
1891: current->flags &= ~PF_USEDFPU;
1892: #endif
1893: #if 0
1894: if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
1895: return -EFAULT;
1896: #endif
1897:
1.1.1.5 root 1898: #if 0
1899: /* XXX: incorrect */
1.1 root 1900: err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
1901: (sizeof(unsigned long) * 32));
1.1.1.5 root 1902: #endif
1.1 root 1903: err |= __get_user(env->fsr, &fpu->si_fsr);
1904: #if 0
1905: err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
1906: if (current->thread.fpqdepth != 0)
1907: err |= __copy_from_user(¤t->thread.fpqueue[0],
1908: &fpu->si_fpqueue[0],
1909: ((sizeof(unsigned long) +
1910: (sizeof(unsigned long *)))*16));
1911: #endif
1912: return err;
1913: }
1914:
1915:
1.1.1.7 root 1916: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1 root 1917: target_siginfo_t *info,
1918: target_sigset_t *set, CPUState *env)
1919: {
1920: fprintf(stderr, "setup_rt_frame: not implemented\n");
1921: }
1922:
1923: long do_sigreturn(CPUState *env)
1924: {
1.1.1.6 root 1925: abi_ulong sf_addr;
1.1 root 1926: struct target_signal_frame *sf;
1927: uint32_t up_psr, pc, npc;
1928: target_sigset_t set;
1929: sigset_t host_set;
1.1.1.6 root 1930: abi_ulong fpu_save_addr;
1.1 root 1931: int err, i;
1932:
1.1.1.6 root 1933: sf_addr = env->regwptr[UREG_FP];
1934: if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1))
1935: goto segv_and_exit;
1.1 root 1936: #if 0
1937: fprintf(stderr, "sigreturn\n");
1938: fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1939: #endif
1940: //cpu_dump_state(env, stderr, fprintf, 0);
1941:
1942: /* 1. Make sure we are not getting garbage from the user */
1943:
1.1.1.6 root 1944: if (sf_addr & 3)
1.1 root 1945: goto segv_and_exit;
1946:
1947: err = __get_user(pc, &sf->info.si_regs.pc);
1948: err |= __get_user(npc, &sf->info.si_regs.npc);
1949:
1950: if ((pc | npc) & 3)
1951: goto segv_and_exit;
1952:
1953: /* 2. Restore the state */
1954: err |= __get_user(up_psr, &sf->info.si_regs.psr);
1955:
1956: /* User can only change condition codes and FPU enabling in %psr. */
1957: env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
1958: | (env->psr & ~(PSR_ICC /* | PSR_EF */));
1959:
1960: env->pc = pc;
1961: env->npc = npc;
1962: err |= __get_user(env->y, &sf->info.si_regs.y);
1963: for (i=0; i < 8; i++) {
1964: err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
1965: }
1966: for (i=0; i < 8; i++) {
1967: err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
1968: }
1969:
1.1.1.6 root 1970: err |= __get_user(fpu_save_addr, &sf->fpu_save);
1.1 root 1971:
1972: //if (fpu_save)
1973: // err |= restore_fpu_state(env, fpu_save);
1974:
1975: /* This is pretty much atomic, no amount locking would prevent
1976: * the races which exist anyways.
1977: */
1978: err |= __get_user(set.sig[0], &sf->info.si_mask);
1979: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1980: err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
1981: }
1982:
1983: target_to_host_sigset_internal(&host_set, &set);
1984: sigprocmask(SIG_SETMASK, &host_set, NULL);
1985:
1986: if (err)
1987: goto segv_and_exit;
1.1.1.6 root 1988: unlock_user_struct(sf, sf_addr, 0);
1.1 root 1989: return env->regwptr[0];
1990:
1991: segv_and_exit:
1.1.1.6 root 1992: unlock_user_struct(sf, sf_addr, 0);
1.1 root 1993: force_sig(TARGET_SIGSEGV);
1994: }
1995:
1996: long do_rt_sigreturn(CPUState *env)
1997: {
1998: fprintf(stderr, "do_rt_sigreturn: not implemented\n");
1.1.1.6 root 1999: return -TARGET_ENOSYS;
2000: }
2001:
2002: #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
2003: #define MC_TSTATE 0
2004: #define MC_PC 1
2005: #define MC_NPC 2
2006: #define MC_Y 3
2007: #define MC_G1 4
2008: #define MC_G2 5
2009: #define MC_G3 6
2010: #define MC_G4 7
2011: #define MC_G5 8
2012: #define MC_G6 9
2013: #define MC_G7 10
2014: #define MC_O0 11
2015: #define MC_O1 12
2016: #define MC_O2 13
2017: #define MC_O3 14
2018: #define MC_O4 15
2019: #define MC_O5 16
2020: #define MC_O6 17
2021: #define MC_O7 18
2022: #define MC_NGREG 19
2023:
2024: typedef abi_ulong target_mc_greg_t;
2025: typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
2026:
2027: struct target_mc_fq {
2028: abi_ulong *mcfq_addr;
2029: uint32_t mcfq_insn;
2030: };
2031:
2032: struct target_mc_fpu {
2033: union {
2034: uint32_t sregs[32];
2035: uint64_t dregs[32];
2036: //uint128_t qregs[16];
2037: } mcfpu_fregs;
2038: abi_ulong mcfpu_fsr;
2039: abi_ulong mcfpu_fprs;
2040: abi_ulong mcfpu_gsr;
2041: struct target_mc_fq *mcfpu_fq;
2042: unsigned char mcfpu_qcnt;
2043: unsigned char mcfpu_qentsz;
2044: unsigned char mcfpu_enab;
2045: };
2046: typedef struct target_mc_fpu target_mc_fpu_t;
2047:
2048: typedef struct {
2049: target_mc_gregset_t mc_gregs;
2050: target_mc_greg_t mc_fp;
2051: target_mc_greg_t mc_i7;
2052: target_mc_fpu_t mc_fpregs;
2053: } target_mcontext_t;
2054:
2055: struct target_ucontext {
2056: struct target_ucontext *uc_link;
2057: abi_ulong uc_flags;
2058: target_sigset_t uc_sigmask;
2059: target_mcontext_t uc_mcontext;
2060: };
2061:
2062: /* A V9 register window */
2063: struct target_reg_window {
2064: abi_ulong locals[8];
2065: abi_ulong ins[8];
2066: };
2067:
2068: #define TARGET_STACK_BIAS 2047
2069:
2070: /* {set, get}context() needed for 64-bit SparcLinux userland. */
2071: void sparc64_set_context(CPUSPARCState *env)
2072: {
2073: abi_ulong ucp_addr;
2074: struct target_ucontext *ucp;
2075: target_mc_gregset_t *grp;
2076: abi_ulong pc, npc, tstate;
2077: abi_ulong fp, i7, w_addr;
2078: unsigned char fenab;
2079: int err;
2080: unsigned int i;
2081:
2082: ucp_addr = env->regwptr[UREG_I0];
2083: if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1))
2084: goto do_sigsegv;
2085: grp = &ucp->uc_mcontext.mc_gregs;
2086: err = __get_user(pc, &((*grp)[MC_PC]));
2087: err |= __get_user(npc, &((*grp)[MC_NPC]));
2088: if (err || ((pc | npc) & 3))
2089: goto do_sigsegv;
2090: if (env->regwptr[UREG_I1]) {
2091: target_sigset_t target_set;
2092: sigset_t set;
2093:
2094: if (TARGET_NSIG_WORDS == 1) {
2095: if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0]))
2096: goto do_sigsegv;
2097: } else {
2098: abi_ulong *src, *dst;
2099: src = ucp->uc_sigmask.sig;
2100: dst = target_set.sig;
2101: for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2102: i++, dst++, src++)
2103: err |= __get_user(*dst, src);
2104: if (err)
2105: goto do_sigsegv;
2106: }
2107: target_to_host_sigset_internal(&set, &target_set);
2108: sigprocmask(SIG_SETMASK, &set, NULL);
2109: }
2110: env->pc = pc;
2111: env->npc = npc;
2112: err |= __get_user(env->y, &((*grp)[MC_Y]));
2113: err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
2114: env->asi = (tstate >> 24) & 0xff;
2115: PUT_CCR(env, tstate >> 32);
2116: PUT_CWP64(env, tstate & 0x1f);
2117: err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
2118: err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
2119: err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
2120: err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
2121: err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
2122: err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
2123: err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
2124: err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
2125: err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
2126: err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
2127: err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
2128: err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
2129: err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
2130: err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
2131: err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
2132:
2133: err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp));
2134: err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7));
2135:
2136: w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2137: if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2138: abi_ulong) != 0)
2139: goto do_sigsegv;
2140: if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2141: abi_ulong) != 0)
2142: goto do_sigsegv;
2143: err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
2144: err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
2145: {
2146: uint32_t *src, *dst;
2147: src = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2148: dst = env->fpr;
2149: /* XXX: check that the CPU storage is the same as user context */
2150: for (i = 0; i < 64; i++, dst++, src++)
2151: err |= __get_user(*dst, src);
2152: }
2153: err |= __get_user(env->fsr,
2154: &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
2155: err |= __get_user(env->gsr,
2156: &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
2157: if (err)
2158: goto do_sigsegv;
2159: unlock_user_struct(ucp, ucp_addr, 0);
2160: return;
2161: do_sigsegv:
2162: unlock_user_struct(ucp, ucp_addr, 0);
2163: force_sig(SIGSEGV);
1.1 root 2164: }
2165:
1.1.1.6 root 2166: void sparc64_get_context(CPUSPARCState *env)
2167: {
2168: abi_ulong ucp_addr;
2169: struct target_ucontext *ucp;
2170: target_mc_gregset_t *grp;
2171: target_mcontext_t *mcp;
2172: abi_ulong fp, i7, w_addr;
2173: int err;
2174: unsigned int i;
2175: target_sigset_t target_set;
2176: sigset_t set;
2177:
2178: ucp_addr = env->regwptr[UREG_I0];
2179: if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0))
2180: goto do_sigsegv;
2181:
2182: mcp = &ucp->uc_mcontext;
2183: grp = &mcp->mc_gregs;
2184:
2185: /* Skip over the trap instruction, first. */
2186: env->pc = env->npc;
2187: env->npc += 4;
2188:
2189: err = 0;
2190:
2191: sigprocmask(0, NULL, &set);
2192: host_to_target_sigset_internal(&target_set, &set);
2193: if (TARGET_NSIG_WORDS == 1) {
2194: err |= __put_user(target_set.sig[0],
2195: (abi_ulong *)&ucp->uc_sigmask);
2196: } else {
2197: abi_ulong *src, *dst;
2198: src = target_set.sig;
2199: dst = ucp->uc_sigmask.sig;
2200: for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2201: i++, dst++, src++)
2202: err |= __put_user(*src, dst);
2203: if (err)
2204: goto do_sigsegv;
2205: }
2206:
2207: /* XXX: tstate must be saved properly */
2208: // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
2209: err |= __put_user(env->pc, &((*grp)[MC_PC]));
2210: err |= __put_user(env->npc, &((*grp)[MC_NPC]));
2211: err |= __put_user(env->y, &((*grp)[MC_Y]));
2212: err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
2213: err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
2214: err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
2215: err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
2216: err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
2217: err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
2218: err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
2219: err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
2220: err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
2221: err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
2222: err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
2223: err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
2224: err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
2225: err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
2226: err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
2227:
2228: w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2229: fp = i7 = 0;
2230: if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2231: abi_ulong) != 0)
2232: goto do_sigsegv;
2233: if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2234: abi_ulong) != 0)
2235: goto do_sigsegv;
2236: err |= __put_user(fp, &(mcp->mc_fp));
2237: err |= __put_user(i7, &(mcp->mc_i7));
2238:
2239: {
2240: uint32_t *src, *dst;
2241: src = env->fpr;
2242: dst = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2243: /* XXX: check that the CPU storage is the same as user context */
2244: for (i = 0; i < 64; i++, dst++, src++)
2245: err |= __put_user(*src, dst);
2246: }
2247: err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
2248: err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
2249: err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
2250:
2251: if (err)
2252: goto do_sigsegv;
2253: unlock_user_struct(ucp, ucp_addr, 1);
2254: return;
2255: do_sigsegv:
2256: unlock_user_struct(ucp, ucp_addr, 1);
2257: force_sig(SIGSEGV);
2258: }
2259: #endif
2260: #elif defined(TARGET_ABI_MIPSN64)
2261:
2262: # warning signal handling not implemented
2263:
1.1.1.7 root 2264: static void setup_frame(int sig, struct target_sigaction *ka,
1.1.1.6 root 2265: target_sigset_t *set, CPUState *env)
2266: {
2267: fprintf(stderr, "setup_frame: not implemented\n");
2268: }
2269:
1.1.1.7 root 2270: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1.1.6 root 2271: target_siginfo_t *info,
2272: target_sigset_t *set, CPUState *env)
2273: {
2274: fprintf(stderr, "setup_rt_frame: not implemented\n");
2275: }
2276:
2277: long do_sigreturn(CPUState *env)
2278: {
2279: fprintf(stderr, "do_sigreturn: not implemented\n");
2280: return -TARGET_ENOSYS;
2281: }
2282:
2283: long do_rt_sigreturn(CPUState *env)
2284: {
2285: fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2286: return -TARGET_ENOSYS;
2287: }
2288:
2289: #elif defined(TARGET_ABI_MIPSN32)
2290:
2291: # warning signal handling not implemented
2292:
1.1.1.7 root 2293: static void setup_frame(int sig, struct target_sigaction *ka,
1.1.1.6 root 2294: target_sigset_t *set, CPUState *env)
2295: {
2296: fprintf(stderr, "setup_frame: not implemented\n");
2297: }
2298:
1.1.1.7 root 2299: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1.1.6 root 2300: target_siginfo_t *info,
2301: target_sigset_t *set, CPUState *env)
2302: {
2303: fprintf(stderr, "setup_rt_frame: not implemented\n");
2304: }
2305:
2306: long do_sigreturn(CPUState *env)
2307: {
2308: fprintf(stderr, "do_sigreturn: not implemented\n");
2309: return -TARGET_ENOSYS;
2310: }
2311:
2312: long do_rt_sigreturn(CPUState *env)
2313: {
2314: fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2315: return -TARGET_ENOSYS;
2316: }
2317:
2318: #elif defined(TARGET_ABI_MIPSO32)
1.1.1.4 root 2319:
2320: struct target_sigcontext {
2321: uint32_t sc_regmask; /* Unused */
2322: uint32_t sc_status;
2323: uint64_t sc_pc;
2324: uint64_t sc_regs[32];
2325: uint64_t sc_fpregs[32];
2326: uint32_t sc_ownedfp; /* Unused */
2327: uint32_t sc_fpc_csr;
2328: uint32_t sc_fpc_eir; /* Unused */
2329: uint32_t sc_used_math;
2330: uint32_t sc_dsp; /* dsp status, was sc_ssflags */
1.1.1.8 root 2331: uint32_t pad0;
1.1.1.4 root 2332: uint64_t sc_mdhi;
2333: uint64_t sc_mdlo;
2334: target_ulong sc_hi1; /* Was sc_cause */
2335: target_ulong sc_lo1; /* Was sc_badvaddr */
2336: target_ulong sc_hi2; /* Was sc_sigset[4] */
2337: target_ulong sc_lo2;
2338: target_ulong sc_hi3;
2339: target_ulong sc_lo3;
2340: };
2341:
2342: struct sigframe {
2343: uint32_t sf_ass[4]; /* argument save space for o32 */
2344: uint32_t sf_code[2]; /* signal trampoline */
2345: struct target_sigcontext sf_sc;
2346: target_sigset_t sf_mask;
2347: };
2348:
1.1.1.8 root 2349: struct target_ucontext {
2350: target_ulong uc_flags;
2351: target_ulong uc_link;
2352: target_stack_t uc_stack;
2353: target_ulong pad0;
2354: struct target_sigcontext uc_mcontext;
2355: target_sigset_t uc_sigmask;
2356: };
2357:
2358: struct target_rt_sigframe {
2359: uint32_t rs_ass[4]; /* argument save space for o32 */
2360: uint32_t rs_code[2]; /* signal trampoline */
2361: struct target_siginfo rs_info;
2362: struct target_ucontext rs_uc;
2363: };
2364:
1.1.1.4 root 2365: /* Install trampoline to jump back from signal handler */
2366: static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
2367: {
2368: int err;
2369:
2370: /*
2371: * Set up the return code ...
2372: *
2373: * li v0, __NR__foo_sigreturn
2374: * syscall
2375: */
2376:
2377: err = __put_user(0x24020000 + syscall, tramp + 0);
2378: err |= __put_user(0x0000000c , tramp + 1);
2379: /* flush_cache_sigtramp((unsigned long) tramp); */
2380: return err;
2381: }
2382:
2383: static inline int
2384: setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2385: {
2386: int err = 0;
2387:
1.1.1.7 root 2388: err |= __put_user(regs->active_tc.PC, &sc->sc_pc);
1.1.1.4 root 2389:
1.1.1.7 root 2390: #define save_gp_reg(i) do { \
2391: err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
1.1.1.4 root 2392: } while(0)
2393: __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2);
2394: save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6);
2395: save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10);
2396: save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
2397: save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18);
2398: save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22);
2399: save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
2400: save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30);
2401: save_gp_reg(31);
1.1.1.6 root 2402: #undef save_gp_reg
1.1.1.4 root 2403:
1.1.1.7 root 2404: err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2405: err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
1.1.1.4 root 2406:
2407: /* Not used yet, but might be useful if we ever have DSP suppport */
2408: #if 0
2409: if (cpu_has_dsp) {
2410: err |= __put_user(mfhi1(), &sc->sc_hi1);
2411: err |= __put_user(mflo1(), &sc->sc_lo1);
2412: err |= __put_user(mfhi2(), &sc->sc_hi2);
2413: err |= __put_user(mflo2(), &sc->sc_lo2);
2414: err |= __put_user(mfhi3(), &sc->sc_hi3);
2415: err |= __put_user(mflo3(), &sc->sc_lo3);
2416: err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2417: }
2418: /* same with 64 bit */
1.1.1.6 root 2419: #ifdef CONFIG_64BIT
1.1.1.4 root 2420: err |= __put_user(regs->hi, &sc->sc_hi[0]);
2421: err |= __put_user(regs->lo, &sc->sc_lo[0]);
2422: if (cpu_has_dsp) {
2423: err |= __put_user(mfhi1(), &sc->sc_hi[1]);
2424: err |= __put_user(mflo1(), &sc->sc_lo[1]);
2425: err |= __put_user(mfhi2(), &sc->sc_hi[2]);
2426: err |= __put_user(mflo2(), &sc->sc_lo[2]);
2427: err |= __put_user(mfhi3(), &sc->sc_hi[3]);
2428: err |= __put_user(mflo3(), &sc->sc_lo[3]);
2429: err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2430: }
1.1.1.6 root 2431: #endif
2432: #endif
1.1.1.4 root 2433:
1.1.1.6 root 2434: #if 0
1.1.1.4 root 2435: err |= __put_user(!!used_math(), &sc->sc_used_math);
2436:
2437: if (!used_math())
2438: goto out;
2439:
2440: /*
2441: * Save FPU state to signal context. Signal handler will "inherit"
2442: * current FPU state.
2443: */
2444: preempt_disable();
2445:
2446: if (!is_fpu_owner()) {
2447: own_fpu();
2448: restore_fp(current);
2449: }
2450: err |= save_fp_context(sc);
2451:
2452: preempt_enable();
2453: out:
2454: #endif
2455: return err;
2456: }
2457:
2458: static inline int
2459: restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2460: {
2461: int err = 0;
2462:
2463: err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
2464:
1.1.1.7 root 2465: err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2466: err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
1.1.1.4 root 2467:
1.1.1.6 root 2468: #define restore_gp_reg(i) do { \
1.1.1.7 root 2469: err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
1.1.1.4 root 2470: } while(0)
2471: restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3);
2472: restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6);
2473: restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9);
2474: restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12);
2475: restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15);
2476: restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18);
2477: restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21);
2478: restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24);
2479: restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27);
2480: restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30);
2481: restore_gp_reg(31);
1.1.1.6 root 2482: #undef restore_gp_reg
1.1.1.4 root 2483:
2484: #if 0
2485: if (cpu_has_dsp) {
2486: err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
2487: err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
2488: err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
2489: err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
2490: err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
2491: err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
2492: err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2493: }
1.1.1.6 root 2494: #ifdef CONFIG_64BIT
1.1.1.4 root 2495: err |= __get_user(regs->hi, &sc->sc_hi[0]);
2496: err |= __get_user(regs->lo, &sc->sc_lo[0]);
2497: if (cpu_has_dsp) {
2498: err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
2499: err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
2500: err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
2501: err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
2502: err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
2503: err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
2504: err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2505: }
1.1.1.6 root 2506: #endif
1.1.1.4 root 2507:
2508: err |= __get_user(used_math, &sc->sc_used_math);
2509: conditional_used_math(used_math);
2510:
2511: preempt_disable();
2512:
2513: if (used_math()) {
2514: /* restore fpu context if we have used it before */
2515: own_fpu();
2516: err |= restore_fp_context(sc);
2517: } else {
2518: /* signal handler may have used FPU. Give it up. */
2519: lose_fpu();
2520: }
2521:
2522: preempt_enable();
2523: #endif
2524: return err;
2525: }
2526: /*
2527: * Determine which stack to use..
2528: */
1.1.1.6 root 2529: static inline abi_ulong
1.1.1.7 root 2530: get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
1.1.1.4 root 2531: {
2532: unsigned long sp;
2533:
2534: /* Default to using normal stack */
1.1.1.7 root 2535: sp = regs->active_tc.gpr[29];
1.1.1.4 root 2536:
2537: /*
2538: * FPU emulator may have it's own trampoline active just
2539: * above the user stack, 16-bytes before the next lowest
2540: * 16 byte boundary. Try to avoid trashing it.
2541: */
2542: sp -= 32;
2543:
2544: /* This is the X/Open sanctioned signal stack switching. */
1.1.1.7 root 2545: if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
1.1.1.6 root 2546: sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2547: }
1.1.1.4 root 2548:
1.1.1.6 root 2549: return (sp - frame_size) & ~7;
1.1.1.4 root 2550: }
2551:
1.1.1.6 root 2552: /* compare linux/arch/mips/kernel/signal.c:setup_frame() */
1.1.1.7 root 2553: static void setup_frame(int sig, struct target_sigaction * ka,
1.1.1.6 root 2554: target_sigset_t *set, CPUState *regs)
1.1.1.4 root 2555: {
2556: struct sigframe *frame;
1.1.1.6 root 2557: abi_ulong frame_addr;
1.1.1.4 root 2558: int i;
2559:
1.1.1.6 root 2560: frame_addr = get_sigframe(ka, regs, sizeof(*frame));
2561: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1.1.1.4 root 2562: goto give_sigsegv;
2563:
2564: install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
2565:
2566: if(setup_sigcontext(regs, &frame->sf_sc))
2567: goto give_sigsegv;
2568:
2569: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2570: if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
2571: goto give_sigsegv;
2572: }
2573:
2574: /*
2575: * Arguments to signal handler:
2576: *
2577: * a0 = signal number
2578: * a1 = 0 (should be cause)
2579: * a2 = pointer to struct sigcontext
2580: *
2581: * $25 and PC point to the signal handler, $29 points to the
2582: * struct sigframe.
2583: */
1.1.1.7 root 2584: regs->active_tc.gpr[ 4] = sig;
2585: regs->active_tc.gpr[ 5] = 0;
2586: regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
2587: regs->active_tc.gpr[29] = frame_addr;
2588: regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
1.1.1.4 root 2589: /* The original kernel code sets CP0_EPC to the handler
2590: * since it returns to userland using eret
2591: * we cannot do this here, and we must set PC directly */
1.1.1.7 root 2592: regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
1.1.1.6 root 2593: unlock_user_struct(frame, frame_addr, 1);
1.1.1.4 root 2594: return;
2595:
2596: give_sigsegv:
1.1.1.6 root 2597: unlock_user_struct(frame, frame_addr, 1);
1.1.1.4 root 2598: force_sig(TARGET_SIGSEGV/*, current*/);
1.1.1.6 root 2599: return;
1.1.1.4 root 2600: }
2601:
2602: long do_sigreturn(CPUState *regs)
2603: {
1.1.1.6 root 2604: struct sigframe *frame;
2605: abi_ulong frame_addr;
2606: sigset_t blocked;
2607: target_sigset_t target_set;
2608: int i;
1.1.1.4 root 2609:
2610: #if defined(DEBUG_SIGNAL)
1.1.1.6 root 2611: fprintf(stderr, "do_sigreturn\n");
1.1.1.4 root 2612: #endif
1.1.1.7 root 2613: frame_addr = regs->active_tc.gpr[29];
1.1.1.6 root 2614: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1.1.1.4 root 2615: goto badframe;
2616:
1.1.1.6 root 2617: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1.1.1.4 root 2618: if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
2619: goto badframe;
1.1.1.6 root 2620: }
1.1.1.4 root 2621:
1.1.1.6 root 2622: target_to_host_sigset_internal(&blocked, &target_set);
2623: sigprocmask(SIG_SETMASK, &blocked, NULL);
1.1.1.4 root 2624:
1.1.1.6 root 2625: if (restore_sigcontext(regs, &frame->sf_sc))
1.1.1.4 root 2626: goto badframe;
2627:
2628: #if 0
1.1.1.6 root 2629: /*
2630: * Don't let your children do this ...
2631: */
2632: __asm__ __volatile__(
1.1.1.4 root 2633: "move\t$29, %0\n\t"
2634: "j\tsyscall_exit"
2635: :/* no outputs */
2636: :"r" (®s));
1.1.1.6 root 2637: /* Unreached */
1.1.1.4 root 2638: #endif
1.1.1.6 root 2639:
1.1.1.7 root 2640: regs->active_tc.PC = regs->CP0_EPC;
1.1.1.6 root 2641: /* I am not sure this is right, but it seems to work
1.1.1.4 root 2642: * maybe a problem with nested signals ? */
2643: regs->CP0_EPC = 0;
1.1.1.8 root 2644: return -TARGET_QEMU_ESIGRETURN;
1.1.1.4 root 2645:
2646: badframe:
1.1.1.6 root 2647: force_sig(TARGET_SIGSEGV/*, current*/);
2648: return 0;
1.1.1.4 root 2649: }
2650:
1.1.1.7 root 2651: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1.1.4 root 2652: target_siginfo_t *info,
2653: target_sigset_t *set, CPUState *env)
2654: {
1.1.1.8 root 2655: struct target_rt_sigframe *frame;
2656: abi_ulong frame_addr;
2657: int i;
2658:
2659: frame_addr = get_sigframe(ka, env, sizeof(*frame));
2660: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2661: goto give_sigsegv;
2662:
2663: install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn);
2664:
2665: copy_siginfo_to_user(&frame->rs_info, info);
2666:
2667: __put_user(0, &frame->rs_uc.uc_flags);
2668: __put_user(0, &frame->rs_uc.uc_link);
2669: __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.uc_stack.ss_sp);
2670: __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.uc_stack.ss_size);
2671: __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
2672: &frame->rs_uc.uc_stack.ss_flags);
2673:
2674: setup_sigcontext(env, &frame->rs_uc.uc_mcontext);
2675:
2676: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2677: __put_user(set->sig[i], &frame->rs_uc.uc_sigmask.sig[i]);
2678: }
2679:
2680: /*
2681: * Arguments to signal handler:
2682: *
2683: * a0 = signal number
2684: * a1 = pointer to struct siginfo
2685: * a2 = pointer to struct ucontext
2686: *
2687: * $25 and PC point to the signal handler, $29 points to the
2688: * struct sigframe.
2689: */
2690: env->active_tc.gpr[ 4] = sig;
2691: env->active_tc.gpr[ 5] = frame_addr
2692: + offsetof(struct target_rt_sigframe, rs_info);
2693: env->active_tc.gpr[ 6] = frame_addr
2694: + offsetof(struct target_rt_sigframe, rs_uc);
2695: env->active_tc.gpr[29] = frame_addr;
2696: env->active_tc.gpr[31] = frame_addr
2697: + offsetof(struct target_rt_sigframe, rs_code);
2698: /* The original kernel code sets CP0_EPC to the handler
2699: * since it returns to userland using eret
2700: * we cannot do this here, and we must set PC directly */
2701: env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
2702: unlock_user_struct(frame, frame_addr, 1);
2703: return;
2704:
2705: give_sigsegv:
2706: unlock_user_struct(frame, frame_addr, 1);
2707: force_sig(TARGET_SIGSEGV/*, current*/);
2708: return;
1.1.1.4 root 2709: }
2710:
2711: long do_rt_sigreturn(CPUState *env)
2712: {
1.1.1.8 root 2713: struct target_rt_sigframe *frame;
2714: abi_ulong frame_addr;
2715: sigset_t blocked;
2716:
2717: #if defined(DEBUG_SIGNAL)
2718: fprintf(stderr, "do_rt_sigreturn\n");
2719: #endif
2720: frame_addr = env->active_tc.gpr[29];
2721: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2722: goto badframe;
2723:
2724: target_to_host_sigset(&blocked, &frame->rs_uc.uc_sigmask);
2725: sigprocmask(SIG_SETMASK, &blocked, NULL);
2726:
2727: if (restore_sigcontext(env, &frame->rs_uc.uc_mcontext))
2728: goto badframe;
2729:
2730: if (do_sigaltstack(frame_addr +
2731: offsetof(struct target_rt_sigframe, rs_uc.uc_stack),
2732: 0, get_sp_from_cpustate(env)) == -EFAULT)
2733: goto badframe;
2734:
2735: env->active_tc.PC = env->CP0_EPC;
2736: /* I am not sure this is right, but it seems to work
2737: * maybe a problem with nested signals ? */
2738: env->CP0_EPC = 0;
2739: return -TARGET_QEMU_ESIGRETURN;
2740:
2741: badframe:
2742: force_sig(TARGET_SIGSEGV/*, current*/);
2743: return 0;
1.1.1.6 root 2744: }
2745:
2746: #elif defined(TARGET_SH4)
2747:
2748: /*
2749: * code and data structures from linux kernel:
2750: * include/asm-sh/sigcontext.h
2751: * arch/sh/kernel/signal.c
2752: */
2753:
2754: struct target_sigcontext {
2755: target_ulong oldmask;
2756:
2757: /* CPU registers */
2758: target_ulong sc_gregs[16];
2759: target_ulong sc_pc;
2760: target_ulong sc_pr;
2761: target_ulong sc_sr;
2762: target_ulong sc_gbr;
2763: target_ulong sc_mach;
2764: target_ulong sc_macl;
2765:
2766: /* FPU registers */
2767: target_ulong sc_fpregs[16];
2768: target_ulong sc_xfpregs[16];
2769: unsigned int sc_fpscr;
2770: unsigned int sc_fpul;
2771: unsigned int sc_ownedfp;
2772: };
2773:
2774: struct target_sigframe
2775: {
2776: struct target_sigcontext sc;
2777: target_ulong extramask[TARGET_NSIG_WORDS-1];
2778: uint16_t retcode[3];
2779: };
2780:
2781:
2782: struct target_ucontext {
2783: target_ulong uc_flags;
2784: struct target_ucontext *uc_link;
2785: target_stack_t uc_stack;
2786: struct target_sigcontext uc_mcontext;
2787: target_sigset_t uc_sigmask; /* mask last for extensibility */
2788: };
2789:
2790: struct target_rt_sigframe
2791: {
2792: struct target_siginfo info;
2793: struct target_ucontext uc;
2794: uint16_t retcode[3];
2795: };
2796:
2797:
2798: #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
2799: #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
2800:
1.1.1.7 root 2801: static abi_ulong get_sigframe(struct target_sigaction *ka,
1.1.1.6 root 2802: unsigned long sp, size_t frame_size)
2803: {
1.1.1.7 root 2804: if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
1.1.1.6 root 2805: sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2806: }
2807:
2808: return (sp - frame_size) & -8ul;
2809: }
2810:
2811: static int setup_sigcontext(struct target_sigcontext *sc,
2812: CPUState *regs, unsigned long mask)
2813: {
2814: int err = 0;
2815:
2816: #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
2817: COPY(gregs[0]); COPY(gregs[1]);
2818: COPY(gregs[2]); COPY(gregs[3]);
2819: COPY(gregs[4]); COPY(gregs[5]);
2820: COPY(gregs[6]); COPY(gregs[7]);
2821: COPY(gregs[8]); COPY(gregs[9]);
2822: COPY(gregs[10]); COPY(gregs[11]);
2823: COPY(gregs[12]); COPY(gregs[13]);
2824: COPY(gregs[14]); COPY(gregs[15]);
2825: COPY(gbr); COPY(mach);
2826: COPY(macl); COPY(pr);
2827: COPY(sr); COPY(pc);
2828: #undef COPY
2829:
2830: /* todo: save FPU registers here */
2831:
2832: /* non-iBCS2 extensions.. */
2833: err |= __put_user(mask, &sc->oldmask);
2834:
2835: return err;
2836: }
2837:
1.1.1.8 root 2838: static int restore_sigcontext(CPUState *regs,
1.1.1.6 root 2839: struct target_sigcontext *sc)
2840: {
2841: unsigned int err = 0;
2842:
2843: #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
2844: COPY(gregs[1]);
2845: COPY(gregs[2]); COPY(gregs[3]);
2846: COPY(gregs[4]); COPY(gregs[5]);
2847: COPY(gregs[6]); COPY(gregs[7]);
2848: COPY(gregs[8]); COPY(gregs[9]);
2849: COPY(gregs[10]); COPY(gregs[11]);
2850: COPY(gregs[12]); COPY(gregs[13]);
2851: COPY(gregs[14]); COPY(gregs[15]);
2852: COPY(gbr); COPY(mach);
2853: COPY(macl); COPY(pr);
2854: COPY(sr); COPY(pc);
2855: #undef COPY
2856:
2857: /* todo: restore FPU registers here */
2858:
2859: regs->tra = -1; /* disable syscall checks */
2860: return err;
2861: }
2862:
1.1.1.7 root 2863: static void setup_frame(int sig, struct target_sigaction *ka,
1.1.1.6 root 2864: target_sigset_t *set, CPUState *regs)
2865: {
2866: struct target_sigframe *frame;
2867: abi_ulong frame_addr;
2868: int i;
2869: int err = 0;
2870: int signal;
2871:
2872: frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
2873: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2874: goto give_sigsegv;
2875:
2876: signal = current_exec_domain_sig(sig);
2877:
2878: err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
2879:
2880: for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
2881: err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
2882: }
2883:
2884: /* Set up to return from userspace. If provided, use a stub
2885: already in userspace. */
1.1.1.7 root 2886: if (ka->sa_flags & TARGET_SA_RESTORER) {
2887: regs->pr = (unsigned long) ka->sa_restorer;
1.1.1.6 root 2888: } else {
2889: /* Generate return code (system call to sigreturn) */
2890: err |= __put_user(MOVW(2), &frame->retcode[0]);
2891: err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
2892: err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
2893: regs->pr = (unsigned long) frame->retcode;
2894: }
2895:
2896: if (err)
2897: goto give_sigsegv;
2898:
2899: /* Set up registers for signal handler */
2900: regs->gregs[15] = (unsigned long) frame;
2901: regs->gregs[4] = signal; /* Arg for signal handler */
2902: regs->gregs[5] = 0;
2903: regs->gregs[6] = (unsigned long) &frame->sc;
1.1.1.7 root 2904: regs->pc = (unsigned long) ka->_sa_handler;
1.1.1.6 root 2905:
2906: unlock_user_struct(frame, frame_addr, 1);
2907: return;
2908:
2909: give_sigsegv:
2910: unlock_user_struct(frame, frame_addr, 1);
2911: force_sig(SIGSEGV);
2912: }
2913:
1.1.1.7 root 2914: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1.1.6 root 2915: target_siginfo_t *info,
2916: target_sigset_t *set, CPUState *regs)
2917: {
2918: struct target_rt_sigframe *frame;
2919: abi_ulong frame_addr;
2920: int i;
2921: int err = 0;
2922: int signal;
2923:
2924: frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
2925: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2926: goto give_sigsegv;
2927:
2928: signal = current_exec_domain_sig(sig);
2929:
2930: err |= copy_siginfo_to_user(&frame->info, info);
2931:
2932: /* Create the ucontext. */
2933: err |= __put_user(0, &frame->uc.uc_flags);
2934: err |= __put_user(0, (unsigned long *)&frame->uc.uc_link);
1.1.1.7 root 2935: err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp,
1.1.1.6 root 2936: &frame->uc.uc_stack.ss_sp);
2937: err |= __put_user(sas_ss_flags(regs->gregs[15]),
2938: &frame->uc.uc_stack.ss_flags);
2939: err |= __put_user(target_sigaltstack_used.ss_size,
2940: &frame->uc.uc_stack.ss_size);
2941: err |= setup_sigcontext(&frame->uc.uc_mcontext,
2942: regs, set->sig[0]);
2943: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2944: err |= __put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]);
2945: }
2946:
2947: /* Set up to return from userspace. If provided, use a stub
2948: already in userspace. */
1.1.1.7 root 2949: if (ka->sa_flags & TARGET_SA_RESTORER) {
2950: regs->pr = (unsigned long) ka->sa_restorer;
1.1.1.6 root 2951: } else {
2952: /* Generate return code (system call to sigreturn) */
2953: err |= __put_user(MOVW(2), &frame->retcode[0]);
2954: err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
2955: err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
2956: regs->pr = (unsigned long) frame->retcode;
2957: }
2958:
2959: if (err)
2960: goto give_sigsegv;
2961:
2962: /* Set up registers for signal handler */
2963: regs->gregs[15] = (unsigned long) frame;
2964: regs->gregs[4] = signal; /* Arg for signal handler */
2965: regs->gregs[5] = (unsigned long) &frame->info;
2966: regs->gregs[6] = (unsigned long) &frame->uc;
1.1.1.7 root 2967: regs->pc = (unsigned long) ka->_sa_handler;
1.1.1.6 root 2968:
2969: unlock_user_struct(frame, frame_addr, 1);
2970: return;
2971:
2972: give_sigsegv:
2973: unlock_user_struct(frame, frame_addr, 1);
2974: force_sig(SIGSEGV);
2975: }
2976:
2977: long do_sigreturn(CPUState *regs)
2978: {
2979: struct target_sigframe *frame;
2980: abi_ulong frame_addr;
2981: sigset_t blocked;
2982: target_sigset_t target_set;
2983: int i;
2984: int err = 0;
2985:
2986: #if defined(DEBUG_SIGNAL)
2987: fprintf(stderr, "do_sigreturn\n");
2988: #endif
2989: frame_addr = regs->gregs[15];
2990: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2991: goto badframe;
2992:
2993: err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
2994: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2995: err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
2996: }
2997:
2998: if (err)
2999: goto badframe;
3000:
3001: target_to_host_sigset_internal(&blocked, &target_set);
3002: sigprocmask(SIG_SETMASK, &blocked, NULL);
3003:
3004: if (restore_sigcontext(regs, &frame->sc))
3005: goto badframe;
3006:
3007: unlock_user_struct(frame, frame_addr, 0);
3008: return regs->gregs[0];
3009:
3010: badframe:
3011: unlock_user_struct(frame, frame_addr, 0);
3012: force_sig(TARGET_SIGSEGV);
3013: return 0;
3014: }
3015:
3016: long do_rt_sigreturn(CPUState *regs)
3017: {
3018: struct target_rt_sigframe *frame;
3019: abi_ulong frame_addr;
3020: sigset_t blocked;
3021:
3022: #if defined(DEBUG_SIGNAL)
3023: fprintf(stderr, "do_rt_sigreturn\n");
3024: #endif
3025: frame_addr = regs->gregs[15];
3026: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3027: goto badframe;
3028:
3029: target_to_host_sigset(&blocked, &frame->uc.uc_sigmask);
3030: sigprocmask(SIG_SETMASK, &blocked, NULL);
3031:
3032: if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
3033: goto badframe;
3034:
3035: if (do_sigaltstack(frame_addr +
3036: offsetof(struct target_rt_sigframe, uc.uc_stack),
3037: 0, get_sp_from_cpustate(regs)) == -EFAULT)
3038: goto badframe;
3039:
3040: unlock_user_struct(frame, frame_addr, 0);
3041: return regs->gregs[0];
3042:
3043: badframe:
3044: unlock_user_struct(frame, frame_addr, 0);
3045: force_sig(TARGET_SIGSEGV);
3046: return 0;
1.1.1.4 root 3047: }
1.1.1.8 root 3048: #elif defined(TARGET_MICROBLAZE)
3049:
3050: struct target_sigcontext {
3051: struct target_pt_regs regs; /* needs to be first */
3052: uint32_t oldmask;
3053: };
3054:
3055: /* Signal frames. */
3056: struct target_signal_frame {
3057: struct target_sigcontext sc;
3058: uint32_t extramask[TARGET_NSIG_WORDS - 1];
3059: uint32_t tramp[2];
3060: };
3061:
3062: struct rt_signal_frame {
3063: struct siginfo info;
3064: struct ucontext uc;
3065: uint32_t tramp[2];
3066: };
3067:
3068: static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env)
3069: {
3070: __put_user(env->regs[0], &sc->regs.r0);
3071: __put_user(env->regs[1], &sc->regs.r1);
3072: __put_user(env->regs[2], &sc->regs.r2);
3073: __put_user(env->regs[3], &sc->regs.r3);
3074: __put_user(env->regs[4], &sc->regs.r4);
3075: __put_user(env->regs[5], &sc->regs.r5);
3076: __put_user(env->regs[6], &sc->regs.r6);
3077: __put_user(env->regs[7], &sc->regs.r7);
3078: __put_user(env->regs[8], &sc->regs.r8);
3079: __put_user(env->regs[9], &sc->regs.r9);
3080: __put_user(env->regs[10], &sc->regs.r10);
3081: __put_user(env->regs[11], &sc->regs.r11);
3082: __put_user(env->regs[12], &sc->regs.r12);
3083: __put_user(env->regs[13], &sc->regs.r13);
3084: __put_user(env->regs[14], &sc->regs.r14);
3085: __put_user(env->regs[15], &sc->regs.r15);
3086: __put_user(env->regs[16], &sc->regs.r16);
3087: __put_user(env->regs[17], &sc->regs.r17);
3088: __put_user(env->regs[18], &sc->regs.r18);
3089: __put_user(env->regs[19], &sc->regs.r19);
3090: __put_user(env->regs[20], &sc->regs.r20);
3091: __put_user(env->regs[21], &sc->regs.r21);
3092: __put_user(env->regs[22], &sc->regs.r22);
3093: __put_user(env->regs[23], &sc->regs.r23);
3094: __put_user(env->regs[24], &sc->regs.r24);
3095: __put_user(env->regs[25], &sc->regs.r25);
3096: __put_user(env->regs[26], &sc->regs.r26);
3097: __put_user(env->regs[27], &sc->regs.r27);
3098: __put_user(env->regs[28], &sc->regs.r28);
3099: __put_user(env->regs[29], &sc->regs.r29);
3100: __put_user(env->regs[30], &sc->regs.r30);
3101: __put_user(env->regs[31], &sc->regs.r31);
3102: __put_user(env->sregs[SR_PC], &sc->regs.pc);
3103: }
3104:
3105: static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env)
3106: {
3107: __get_user(env->regs[0], &sc->regs.r0);
3108: __get_user(env->regs[1], &sc->regs.r1);
3109: __get_user(env->regs[2], &sc->regs.r2);
3110: __get_user(env->regs[3], &sc->regs.r3);
3111: __get_user(env->regs[4], &sc->regs.r4);
3112: __get_user(env->regs[5], &sc->regs.r5);
3113: __get_user(env->regs[6], &sc->regs.r6);
3114: __get_user(env->regs[7], &sc->regs.r7);
3115: __get_user(env->regs[8], &sc->regs.r8);
3116: __get_user(env->regs[9], &sc->regs.r9);
3117: __get_user(env->regs[10], &sc->regs.r10);
3118: __get_user(env->regs[11], &sc->regs.r11);
3119: __get_user(env->regs[12], &sc->regs.r12);
3120: __get_user(env->regs[13], &sc->regs.r13);
3121: __get_user(env->regs[14], &sc->regs.r14);
3122: __get_user(env->regs[15], &sc->regs.r15);
3123: __get_user(env->regs[16], &sc->regs.r16);
3124: __get_user(env->regs[17], &sc->regs.r17);
3125: __get_user(env->regs[18], &sc->regs.r18);
3126: __get_user(env->regs[19], &sc->regs.r19);
3127: __get_user(env->regs[20], &sc->regs.r20);
3128: __get_user(env->regs[21], &sc->regs.r21);
3129: __get_user(env->regs[22], &sc->regs.r22);
3130: __get_user(env->regs[23], &sc->regs.r23);
3131: __get_user(env->regs[24], &sc->regs.r24);
3132: __get_user(env->regs[25], &sc->regs.r25);
3133: __get_user(env->regs[26], &sc->regs.r26);
3134: __get_user(env->regs[27], &sc->regs.r27);
3135: __get_user(env->regs[28], &sc->regs.r28);
3136: __get_user(env->regs[29], &sc->regs.r29);
3137: __get_user(env->regs[30], &sc->regs.r30);
3138: __get_user(env->regs[31], &sc->regs.r31);
3139: __get_user(env->sregs[SR_PC], &sc->regs.pc);
3140: }
3141:
3142: static abi_ulong get_sigframe(struct target_sigaction *ka,
3143: CPUState *env, int frame_size)
3144: {
3145: abi_ulong sp = env->regs[1];
3146:
3147: if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp))
3148: sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3149:
3150: return ((sp - frame_size) & -8UL);
3151: }
3152:
3153: static void setup_frame(int sig, struct target_sigaction *ka,
3154: target_sigset_t *set, CPUState *env)
3155: {
3156: struct target_signal_frame *frame;
3157: abi_ulong frame_addr;
3158: int err = 0;
3159: int i;
3160:
3161: frame_addr = get_sigframe(ka, env, sizeof *frame);
3162: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3163: goto badframe;
3164:
3165: /* Save the mask. */
3166: err |= __put_user(set->sig[0], &frame->sc.oldmask);
3167: if (err)
3168: goto badframe;
3169:
3170: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3171: if (__put_user(set->sig[i], &frame->extramask[i - 1]))
3172: goto badframe;
3173: }
3174:
3175: setup_sigcontext(&frame->sc, env);
3176:
3177: /* Set up to return from userspace. If provided, use a stub
3178: already in userspace. */
3179: /* minus 8 is offset to cater for "rtsd r15,8" offset */
3180: if (ka->sa_flags & TARGET_SA_RESTORER) {
3181: env->regs[15] = ((unsigned long)ka->sa_restorer)-8;
3182: } else {
3183: uint32_t t;
3184: /* Note, these encodings are _big endian_! */
3185: /* addi r12, r0, __NR_sigreturn */
3186: t = 0x31800000UL | TARGET_NR_sigreturn;
3187: err |= __put_user(t, frame->tramp + 0);
3188: /* brki r14, 0x8 */
3189: t = 0xb9cc0008UL;
3190: err |= __put_user(t, frame->tramp + 1);
3191:
3192: /* Return from sighandler will jump to the tramp.
3193: Negative 8 offset because return is rtsd r15, 8 */
3194: env->regs[15] = ((unsigned long)frame->tramp) - 8;
3195: }
3196:
3197: if (err)
3198: goto badframe;
3199:
3200: /* Set up registers for signal handler */
3201: env->regs[1] = (unsigned long) frame;
3202: /* Signal handler args: */
3203: env->regs[5] = sig; /* Arg 0: signum */
3204: env->regs[6] = (unsigned long) &frame->sc; /* arg 1: sigcontext */
3205:
3206: /* Offset of 4 to handle microblaze rtid r14, 0 */
3207: env->sregs[SR_PC] = (unsigned long)ka->_sa_handler;
3208:
3209: unlock_user_struct(frame, frame_addr, 1);
3210: return;
3211: badframe:
3212: unlock_user_struct(frame, frame_addr, 1);
3213: force_sig(TARGET_SIGSEGV);
3214: }
3215:
3216: static void setup_rt_frame(int sig, struct target_sigaction *ka,
3217: target_siginfo_t *info,
3218: target_sigset_t *set, CPUState *env)
3219: {
3220: fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n");
3221: }
3222:
3223: long do_sigreturn(CPUState *env)
3224: {
3225: struct target_signal_frame *frame;
3226: abi_ulong frame_addr;
3227: target_sigset_t target_set;
3228: sigset_t set;
3229: int i;
3230:
3231: frame_addr = env->regs[R_SP];
3232: /* Make sure the guest isn't playing games. */
3233: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3234: goto badframe;
3235:
3236: /* Restore blocked signals */
3237: if (__get_user(target_set.sig[0], &frame->sc.oldmask))
3238: goto badframe;
3239: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3240: if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3241: goto badframe;
3242: }
3243: target_to_host_sigset_internal(&set, &target_set);
3244: sigprocmask(SIG_SETMASK, &set, NULL);
3245:
3246: restore_sigcontext(&frame->sc, env);
3247: /* We got here through a sigreturn syscall, our path back is via an
3248: rtb insn so setup r14 for that. */
3249: env->regs[14] = env->sregs[SR_PC];
3250:
3251: unlock_user_struct(frame, frame_addr, 0);
3252: return env->regs[10];
3253: badframe:
3254: unlock_user_struct(frame, frame_addr, 0);
3255: force_sig(TARGET_SIGSEGV);
3256: }
3257:
3258: long do_rt_sigreturn(CPUState *env)
3259: {
3260: fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n");
3261: return -TARGET_ENOSYS;
3262: }
3263:
1.1.1.7 root 3264: #elif defined(TARGET_CRIS)
3265:
3266: struct target_sigcontext {
3267: struct target_pt_regs regs; /* needs to be first */
3268: uint32_t oldmask;
3269: uint32_t usp; /* usp before stacking this gunk on it */
3270: };
3271:
3272: /* Signal frames. */
3273: struct target_signal_frame {
3274: struct target_sigcontext sc;
3275: uint32_t extramask[TARGET_NSIG_WORDS - 1];
3276: uint8_t retcode[8]; /* Trampoline code. */
3277: };
3278:
3279: struct rt_signal_frame {
3280: struct siginfo *pinfo;
3281: void *puc;
3282: struct siginfo info;
3283: struct ucontext uc;
3284: uint8_t retcode[8]; /* Trampoline code. */
3285: };
3286:
3287: static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env)
3288: {
3289: __put_user(env->regs[0], &sc->regs.r0);
3290: __put_user(env->regs[1], &sc->regs.r1);
3291: __put_user(env->regs[2], &sc->regs.r2);
3292: __put_user(env->regs[3], &sc->regs.r3);
3293: __put_user(env->regs[4], &sc->regs.r4);
3294: __put_user(env->regs[5], &sc->regs.r5);
3295: __put_user(env->regs[6], &sc->regs.r6);
3296: __put_user(env->regs[7], &sc->regs.r7);
3297: __put_user(env->regs[8], &sc->regs.r8);
3298: __put_user(env->regs[9], &sc->regs.r9);
3299: __put_user(env->regs[10], &sc->regs.r10);
3300: __put_user(env->regs[11], &sc->regs.r11);
3301: __put_user(env->regs[12], &sc->regs.r12);
3302: __put_user(env->regs[13], &sc->regs.r13);
3303: __put_user(env->regs[14], &sc->usp);
3304: __put_user(env->regs[15], &sc->regs.acr);
3305: __put_user(env->pregs[PR_MOF], &sc->regs.mof);
3306: __put_user(env->pregs[PR_SRP], &sc->regs.srp);
3307: __put_user(env->pc, &sc->regs.erp);
3308: }
3309:
3310: static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env)
3311: {
3312: __get_user(env->regs[0], &sc->regs.r0);
3313: __get_user(env->regs[1], &sc->regs.r1);
3314: __get_user(env->regs[2], &sc->regs.r2);
3315: __get_user(env->regs[3], &sc->regs.r3);
3316: __get_user(env->regs[4], &sc->regs.r4);
3317: __get_user(env->regs[5], &sc->regs.r5);
3318: __get_user(env->regs[6], &sc->regs.r6);
3319: __get_user(env->regs[7], &sc->regs.r7);
3320: __get_user(env->regs[8], &sc->regs.r8);
3321: __get_user(env->regs[9], &sc->regs.r9);
3322: __get_user(env->regs[10], &sc->regs.r10);
3323: __get_user(env->regs[11], &sc->regs.r11);
3324: __get_user(env->regs[12], &sc->regs.r12);
3325: __get_user(env->regs[13], &sc->regs.r13);
3326: __get_user(env->regs[14], &sc->usp);
3327: __get_user(env->regs[15], &sc->regs.acr);
3328: __get_user(env->pregs[PR_MOF], &sc->regs.mof);
3329: __get_user(env->pregs[PR_SRP], &sc->regs.srp);
3330: __get_user(env->pc, &sc->regs.erp);
3331: }
3332:
3333: static abi_ulong get_sigframe(CPUState *env, int framesize)
3334: {
3335: abi_ulong sp;
3336: /* Align the stack downwards to 4. */
3337: sp = (env->regs[R_SP] & ~3);
3338: return sp - framesize;
3339: }
3340:
3341: static void setup_frame(int sig, struct target_sigaction *ka,
3342: target_sigset_t *set, CPUState *env)
3343: {
3344: struct target_signal_frame *frame;
3345: abi_ulong frame_addr;
3346: int err = 0;
3347: int i;
3348:
3349: frame_addr = get_sigframe(env, sizeof *frame);
3350: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3351: goto badframe;
3352:
3353: /*
3354: * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
3355: * use this trampoline anymore but it sets it up for GDB.
3356: * In QEMU, using the trampoline simplifies things a bit so we use it.
3357: *
3358: * This is movu.w __NR_sigreturn, r9; break 13;
3359: */
3360: err |= __put_user(0x9c5f, frame->retcode+0);
3361: err |= __put_user(TARGET_NR_sigreturn,
3362: frame->retcode+2);
3363: err |= __put_user(0xe93d, frame->retcode+4);
3364:
3365: /* Save the mask. */
3366: err |= __put_user(set->sig[0], &frame->sc.oldmask);
3367: if (err)
3368: goto badframe;
3369:
3370: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3371: if (__put_user(set->sig[i], &frame->extramask[i - 1]))
3372: goto badframe;
3373: }
3374:
3375: setup_sigcontext(&frame->sc, env);
3376:
3377: /* Move the stack and setup the arguments for the handler. */
3378: env->regs[R_SP] = (uint32_t) (unsigned long) frame;
3379: env->regs[10] = sig;
3380: env->pc = (unsigned long) ka->_sa_handler;
3381: /* Link SRP so the guest returns through the trampoline. */
3382: env->pregs[PR_SRP] = (uint32_t) (unsigned long) &frame->retcode[0];
3383:
3384: unlock_user_struct(frame, frame_addr, 1);
3385: return;
3386: badframe:
3387: unlock_user_struct(frame, frame_addr, 1);
3388: force_sig(TARGET_SIGSEGV);
3389: }
3390:
3391: static void setup_rt_frame(int sig, struct target_sigaction *ka,
3392: target_siginfo_t *info,
3393: target_sigset_t *set, CPUState *env)
3394: {
3395: fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
3396: }
3397:
3398: long do_sigreturn(CPUState *env)
3399: {
3400: struct target_signal_frame *frame;
3401: abi_ulong frame_addr;
3402: target_sigset_t target_set;
3403: sigset_t set;
3404: int i;
3405:
3406: frame_addr = env->regs[R_SP];
3407: /* Make sure the guest isn't playing games. */
3408: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3409: goto badframe;
3410:
3411: /* Restore blocked signals */
3412: if (__get_user(target_set.sig[0], &frame->sc.oldmask))
3413: goto badframe;
3414: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3415: if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3416: goto badframe;
3417: }
3418: target_to_host_sigset_internal(&set, &target_set);
3419: sigprocmask(SIG_SETMASK, &set, NULL);
3420:
3421: restore_sigcontext(&frame->sc, env);
3422: unlock_user_struct(frame, frame_addr, 0);
3423: return env->regs[10];
3424: badframe:
3425: unlock_user_struct(frame, frame_addr, 0);
3426: force_sig(TARGET_SIGSEGV);
3427: }
3428:
3429: long do_rt_sigreturn(CPUState *env)
3430: {
3431: fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
3432: return -TARGET_ENOSYS;
3433: }
1.1 root 3434:
1.1.1.8 root 3435: #elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
3436:
3437: /* FIXME: Many of the structures are defined for both PPC and PPC64, but
3438: the signal handling is different enough that we haven't implemented
3439: support for PPC64 yet. Hence the restriction above.
3440:
3441: There are various #if'd blocks for code for TARGET_PPC64. These
3442: blocks should go away so that we can successfully run 32-bit and
3443: 64-bit binaries on a QEMU configured for PPC64. */
3444:
3445: /* Size of dummy stack frame allocated when calling signal handler.
3446: See arch/powerpc/include/asm/ptrace.h. */
3447: #if defined(TARGET_PPC64)
3448: #define SIGNAL_FRAMESIZE 128
3449: #else
3450: #define SIGNAL_FRAMESIZE 64
3451: #endif
3452:
3453: /* See arch/powerpc/include/asm/sigcontext.h. */
3454: struct target_sigcontext {
3455: target_ulong _unused[4];
3456: int32_t signal;
3457: #if defined(TARGET_PPC64)
3458: int32_t pad0;
3459: #endif
3460: target_ulong handler;
3461: target_ulong oldmask;
3462: target_ulong regs; /* struct pt_regs __user * */
3463: /* TODO: PPC64 includes extra bits here. */
3464: };
3465:
3466: /* Indices for target_mcontext.mc_gregs, below.
3467: See arch/powerpc/include/asm/ptrace.h for details. */
3468: enum {
3469: TARGET_PT_R0 = 0,
3470: TARGET_PT_R1 = 1,
3471: TARGET_PT_R2 = 2,
3472: TARGET_PT_R3 = 3,
3473: TARGET_PT_R4 = 4,
3474: TARGET_PT_R5 = 5,
3475: TARGET_PT_R6 = 6,
3476: TARGET_PT_R7 = 7,
3477: TARGET_PT_R8 = 8,
3478: TARGET_PT_R9 = 9,
3479: TARGET_PT_R10 = 10,
3480: TARGET_PT_R11 = 11,
3481: TARGET_PT_R12 = 12,
3482: TARGET_PT_R13 = 13,
3483: TARGET_PT_R14 = 14,
3484: TARGET_PT_R15 = 15,
3485: TARGET_PT_R16 = 16,
3486: TARGET_PT_R17 = 17,
3487: TARGET_PT_R18 = 18,
3488: TARGET_PT_R19 = 19,
3489: TARGET_PT_R20 = 20,
3490: TARGET_PT_R21 = 21,
3491: TARGET_PT_R22 = 22,
3492: TARGET_PT_R23 = 23,
3493: TARGET_PT_R24 = 24,
3494: TARGET_PT_R25 = 25,
3495: TARGET_PT_R26 = 26,
3496: TARGET_PT_R27 = 27,
3497: TARGET_PT_R28 = 28,
3498: TARGET_PT_R29 = 29,
3499: TARGET_PT_R30 = 30,
3500: TARGET_PT_R31 = 31,
3501: TARGET_PT_NIP = 32,
3502: TARGET_PT_MSR = 33,
3503: TARGET_PT_ORIG_R3 = 34,
3504: TARGET_PT_CTR = 35,
3505: TARGET_PT_LNK = 36,
3506: TARGET_PT_XER = 37,
3507: TARGET_PT_CCR = 38,
3508: /* Yes, there are two registers with #39. One is 64-bit only. */
3509: TARGET_PT_MQ = 39,
3510: TARGET_PT_SOFTE = 39,
3511: TARGET_PT_TRAP = 40,
3512: TARGET_PT_DAR = 41,
3513: TARGET_PT_DSISR = 42,
3514: TARGET_PT_RESULT = 43,
3515: TARGET_PT_REGS_COUNT = 44
3516: };
3517:
3518: /* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC;
3519: on 64-bit PPC, sigcontext and mcontext are one and the same. */
3520: struct target_mcontext {
3521: target_ulong mc_gregs[48];
3522: /* Includes fpscr. */
3523: uint64_t mc_fregs[33];
3524: target_ulong mc_pad[2];
3525: /* We need to handle Altivec and SPE at the same time, which no
3526: kernel needs to do. Fortunately, the kernel defines this bit to
3527: be Altivec-register-large all the time, rather than trying to
3528: twiddle it based on the specific platform. */
3529: union {
3530: /* SPE vector registers. One extra for SPEFSCR. */
3531: uint32_t spe[33];
3532: /* Altivec vector registers. The packing of VSCR and VRSAVE
3533: varies depending on whether we're PPC64 or not: PPC64 splits
3534: them apart; PPC32 stuffs them together. */
3535: #if defined(TARGET_PPC64)
1.1.1.9 ! root 3536: #define QEMU_NVRREG 34
1.1.1.8 root 3537: #else
1.1.1.9 ! root 3538: #define QEMU_NVRREG 33
1.1.1.8 root 3539: #endif
1.1.1.9 ! root 3540: ppc_avr_t altivec[QEMU_NVRREG];
! 3541: #undef QEMU_NVRREG
1.1.1.8 root 3542: } mc_vregs __attribute__((__aligned__(16)));
3543: };
3544:
3545: struct target_ucontext {
3546: target_ulong uc_flags;
3547: target_ulong uc_link; /* struct ucontext __user * */
3548: struct target_sigaltstack uc_stack;
3549: #if !defined(TARGET_PPC64)
3550: int32_t uc_pad[7];
3551: target_ulong uc_regs; /* struct mcontext __user *
3552: points to uc_mcontext field */
3553: #endif
3554: target_sigset_t uc_sigmask;
3555: #if defined(TARGET_PPC64)
3556: target_sigset_t unused[15]; /* Allow for uc_sigmask growth */
3557: struct target_sigcontext uc_mcontext;
3558: #else
3559: int32_t uc_maskext[30];
3560: int32_t uc_pad2[3];
3561: struct target_mcontext uc_mcontext;
3562: #endif
3563: };
3564:
3565: /* See arch/powerpc/kernel/signal_32.c. */
3566: struct target_sigframe {
3567: struct target_sigcontext sctx;
3568: struct target_mcontext mctx;
3569: int32_t abigap[56];
3570: };
3571:
3572: struct target_rt_sigframe {
3573: struct target_siginfo info;
3574: struct target_ucontext uc;
3575: int32_t abigap[56];
3576: };
3577:
3578: /* We use the mc_pad field for the signal return trampoline. */
3579: #define tramp mc_pad
3580:
3581: /* See arch/powerpc/kernel/signal.c. */
3582: static target_ulong get_sigframe(struct target_sigaction *ka,
3583: CPUState *env,
3584: int frame_size)
3585: {
3586: target_ulong oldsp, newsp;
3587:
3588: oldsp = env->gpr[1];
3589:
3590: if ((ka->sa_flags & TARGET_SA_ONSTACK) &&
3591: (sas_ss_flags(oldsp))) {
3592: oldsp = (target_sigaltstack_used.ss_sp
3593: + target_sigaltstack_used.ss_size);
3594: }
3595:
3596: newsp = (oldsp - frame_size) & ~0xFUL;
3597:
3598: return newsp;
3599: }
3600:
3601: static int save_user_regs(CPUState *env, struct target_mcontext *frame,
3602: int sigret)
3603: {
3604: target_ulong msr = env->msr;
3605: int i;
3606: target_ulong ccr = 0;
3607:
3608: /* In general, the kernel attempts to be intelligent about what it
3609: needs to save for Altivec/FP/SPE registers. We don't care that
3610: much, so we just go ahead and save everything. */
3611:
3612: /* Save general registers. */
3613: for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
3614: if (__put_user(env->gpr[i], &frame->mc_gregs[i])) {
3615: return 1;
3616: }
3617: }
3618: if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
3619: || __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
3620: || __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
3621: || __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
3622: return 1;
3623:
3624: for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
3625: ccr |= env->crf[i] << (32 - ((i + 1) * 4));
3626: }
3627: if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
3628: return 1;
3629:
3630: /* Save Altivec registers if necessary. */
3631: if (env->insns_flags & PPC_ALTIVEC) {
3632: for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
3633: ppc_avr_t *avr = &env->avr[i];
3634: ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
3635:
3636: if (__put_user(avr->u64[0], &vreg->u64[0]) ||
3637: __put_user(avr->u64[1], &vreg->u64[1])) {
3638: return 1;
3639: }
3640: }
3641: /* Set MSR_VR in the saved MSR value to indicate that
3642: frame->mc_vregs contains valid data. */
3643: msr |= MSR_VR;
3644: if (__put_user((uint32_t)env->spr[SPR_VRSAVE],
3645: &frame->mc_vregs.altivec[32].u32[3]))
3646: return 1;
3647: }
3648:
3649: /* Save floating point registers. */
3650: if (env->insns_flags & PPC_FLOAT) {
3651: for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
3652: if (__put_user(env->fpr[i], &frame->mc_fregs[i])) {
3653: return 1;
3654: }
3655: }
3656: if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32]))
3657: return 1;
3658: }
3659:
3660: /* Save SPE registers. The kernel only saves the high half. */
3661: if (env->insns_flags & PPC_SPE) {
3662: #if defined(TARGET_PPC64)
3663: for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
3664: if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) {
3665: return 1;
3666: }
3667: }
3668: #else
3669: for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
3670: if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
3671: return 1;
3672: }
3673: }
3674: #endif
3675: /* Set MSR_SPE in the saved MSR value to indicate that
3676: frame->mc_vregs contains valid data. */
3677: msr |= MSR_SPE;
3678: if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
3679: return 1;
3680: }
3681:
3682: /* Store MSR. */
3683: if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
3684: return 1;
3685:
3686: /* Set up the sigreturn trampoline: li r0,sigret; sc. */
3687: if (sigret) {
3688: if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) ||
3689: __put_user(0x44000002UL, &frame->tramp[1])) {
3690: return 1;
3691: }
3692: }
3693:
3694: return 0;
3695: }
3696:
3697: static int restore_user_regs(CPUState *env,
3698: struct target_mcontext *frame, int sig)
3699: {
3700: target_ulong save_r2 = 0;
3701: target_ulong msr;
3702: target_ulong ccr;
3703:
3704: int i;
3705:
3706: if (!sig) {
3707: save_r2 = env->gpr[2];
3708: }
3709:
3710: /* Restore general registers. */
3711: for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
3712: if (__get_user(env->gpr[i], &frame->mc_gregs[i])) {
3713: return 1;
3714: }
3715: }
3716: if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
3717: || __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
3718: || __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
3719: || __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
3720: return 1;
3721: if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
3722: return 1;
3723:
3724: for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
3725: env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf;
3726: }
3727:
3728: if (!sig) {
3729: env->gpr[2] = save_r2;
3730: }
3731: /* Restore MSR. */
3732: if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
3733: return 1;
3734:
3735: /* If doing signal return, restore the previous little-endian mode. */
3736: if (sig)
3737: env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE);
3738:
3739: /* Restore Altivec registers if necessary. */
3740: if (env->insns_flags & PPC_ALTIVEC) {
3741: for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
3742: ppc_avr_t *avr = &env->avr[i];
3743: ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
3744:
3745: if (__get_user(avr->u64[0], &vreg->u64[0]) ||
3746: __get_user(avr->u64[1], &vreg->u64[1])) {
3747: return 1;
3748: }
3749: }
3750: /* Set MSR_VEC in the saved MSR value to indicate that
3751: frame->mc_vregs contains valid data. */
3752: if (__get_user(env->spr[SPR_VRSAVE],
3753: (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3])))
3754: return 1;
3755: }
3756:
3757: /* Restore floating point registers. */
3758: if (env->insns_flags & PPC_FLOAT) {
3759: uint64_t fpscr;
3760: for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
3761: if (__get_user(env->fpr[i], &frame->mc_fregs[i])) {
3762: return 1;
3763: }
3764: }
3765: if (__get_user(fpscr, &frame->mc_fregs[32]))
3766: return 1;
3767: env->fpscr = (uint32_t) fpscr;
3768: }
3769:
3770: /* Save SPE registers. The kernel only saves the high half. */
3771: if (env->insns_flags & PPC_SPE) {
3772: #if defined(TARGET_PPC64)
3773: for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
3774: uint32_t hi;
3775:
3776: if (__get_user(hi, &frame->mc_vregs.spe[i])) {
3777: return 1;
3778: }
3779: env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
3780: }
3781: #else
3782: for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
3783: if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
3784: return 1;
3785: }
3786: }
3787: #endif
3788: if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
3789: return 1;
3790: }
3791:
3792: return 0;
3793: }
3794:
3795: static void setup_frame(int sig, struct target_sigaction *ka,
3796: target_sigset_t *set, CPUState *env)
3797: {
3798: struct target_sigframe *frame;
3799: struct target_sigcontext *sc;
3800: target_ulong frame_addr, newsp;
3801: int err = 0;
3802: int signal;
3803:
3804: frame_addr = get_sigframe(ka, env, sizeof(*frame));
3805: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3806: goto sigsegv;
3807: sc = &frame->sctx;
3808:
3809: signal = current_exec_domain_sig(sig);
3810:
3811: err |= __put_user(h2g(ka->_sa_handler), &sc->handler);
3812: err |= __put_user(set->sig[0], &sc->oldmask);
3813: #if defined(TARGET_PPC64)
3814: err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]);
3815: #else
3816: err |= __put_user(set->sig[1], &sc->_unused[3]);
3817: #endif
3818: err |= __put_user(h2g(&frame->mctx), &sc->regs);
3819: err |= __put_user(sig, &sc->signal);
3820:
3821: /* Save user regs. */
3822: err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn);
3823:
3824: /* The kernel checks for the presence of a VDSO here. We don't
3825: emulate a vdso, so use a sigreturn system call. */
3826: env->lr = (target_ulong) h2g(frame->mctx.tramp);
3827:
3828: /* Turn off all fp exceptions. */
3829: env->fpscr = 0;
3830:
3831: /* Create a stack frame for the caller of the handler. */
3832: newsp = frame_addr - SIGNAL_FRAMESIZE;
3833: err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
3834:
3835: if (err)
3836: goto sigsegv;
3837:
3838: /* Set up registers for signal handler. */
3839: env->gpr[1] = newsp;
3840: env->gpr[3] = signal;
3841: env->gpr[4] = (target_ulong) h2g(sc);
3842: env->nip = (target_ulong) ka->_sa_handler;
3843: /* Signal handlers are entered in big-endian mode. */
3844: env->msr &= ~MSR_LE;
3845:
3846: unlock_user_struct(frame, frame_addr, 1);
3847: return;
3848:
3849: sigsegv:
3850: unlock_user_struct(frame, frame_addr, 1);
3851: if (logfile)
3852: fprintf (logfile, "segfaulting from setup_frame\n");
3853: force_sig(SIGSEGV);
3854: }
3855:
3856: static void setup_rt_frame(int sig, struct target_sigaction *ka,
3857: target_siginfo_t *info,
3858: target_sigset_t *set, CPUState *env)
3859: {
3860: struct target_rt_sigframe *rt_sf;
3861: struct target_mcontext *frame;
3862: target_ulong rt_sf_addr, newsp = 0;
3863: int i, err = 0;
3864: int signal;
3865:
3866: rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
3867: if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1))
3868: goto sigsegv;
3869:
3870: signal = current_exec_domain_sig(sig);
3871:
3872: err |= copy_siginfo_to_user(&rt_sf->info, info);
3873:
3874: err |= __put_user(0, &rt_sf->uc.uc_flags);
3875: err |= __put_user(0, &rt_sf->uc.uc_link);
3876: err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp,
3877: &rt_sf->uc.uc_stack.ss_sp);
3878: err |= __put_user(sas_ss_flags(env->gpr[1]),
3879: &rt_sf->uc.uc_stack.ss_flags);
3880: err |= __put_user(target_sigaltstack_used.ss_size,
3881: &rt_sf->uc.uc_stack.ss_size);
3882: err |= __put_user(h2g (&rt_sf->uc.uc_mcontext),
3883: &rt_sf->uc.uc_regs);
3884: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
3885: err |= __put_user(set->sig[i], &rt_sf->uc.uc_sigmask.sig[i]);
3886: }
3887:
3888: frame = &rt_sf->uc.uc_mcontext;
3889: err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn);
3890:
3891: /* The kernel checks for the presence of a VDSO here. We don't
3892: emulate a vdso, so use a sigreturn system call. */
3893: env->lr = (target_ulong) h2g(frame->tramp);
3894:
3895: /* Turn off all fp exceptions. */
3896: env->fpscr = 0;
3897:
3898: /* Create a stack frame for the caller of the handler. */
3899: newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
3900: err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
3901:
3902: if (err)
3903: goto sigsegv;
3904:
3905: /* Set up registers for signal handler. */
3906: env->gpr[1] = newsp;
3907: env->gpr[3] = (target_ulong) signal;
3908: env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
3909: env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
3910: env->gpr[6] = (target_ulong) h2g(rt_sf);
3911: env->nip = (target_ulong) ka->_sa_handler;
3912: /* Signal handlers are entered in big-endian mode. */
3913: env->msr &= ~MSR_LE;
3914:
3915: unlock_user_struct(rt_sf, rt_sf_addr, 1);
3916: return;
3917:
3918: sigsegv:
3919: unlock_user_struct(rt_sf, rt_sf_addr, 1);
3920: if (logfile)
3921: fprintf (logfile, "segfaulting from setup_rt_frame\n");
3922: force_sig(SIGSEGV);
3923:
3924: }
3925:
3926: long do_sigreturn(CPUState *env)
3927: {
3928: struct target_sigcontext *sc = NULL;
3929: struct target_mcontext *sr = NULL;
3930: target_ulong sr_addr, sc_addr;
3931: sigset_t blocked;
3932: target_sigset_t set;
3933:
3934: sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
3935: if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1))
3936: goto sigsegv;
3937:
3938: #if defined(TARGET_PPC64)
3939: set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32);
3940: #else
3941: if(__get_user(set.sig[0], &sc->oldmask) ||
3942: __get_user(set.sig[1], &sc->_unused[3]))
3943: goto sigsegv;
3944: #endif
3945: target_to_host_sigset_internal(&blocked, &set);
3946: sigprocmask(SIG_SETMASK, &blocked, NULL);
3947:
3948: if (__get_user(sr_addr, &sc->regs))
3949: goto sigsegv;
3950: if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1))
3951: goto sigsegv;
3952: if (restore_user_regs(env, sr, 1))
3953: goto sigsegv;
3954:
3955: unlock_user_struct(sr, sr_addr, 1);
3956: unlock_user_struct(sc, sc_addr, 1);
3957: return -TARGET_QEMU_ESIGRETURN;
3958:
3959: sigsegv:
3960: unlock_user_struct(sr, sr_addr, 1);
3961: unlock_user_struct(sc, sc_addr, 1);
3962: if (logfile)
3963: fprintf (logfile, "segfaulting from do_sigreturn\n");
3964: force_sig(SIGSEGV);
3965: return 0;
3966: }
3967:
3968: /* See arch/powerpc/kernel/signal_32.c. */
3969: static int do_setcontext(struct target_ucontext *ucp, CPUState *env, int sig)
3970: {
3971: struct target_mcontext *mcp;
3972: target_ulong mcp_addr;
3973: sigset_t blocked;
3974: target_sigset_t set;
3975:
3976: if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, uc_sigmask),
3977: sizeof (set)))
3978: return 1;
3979:
3980: #if defined(TARGET_PPC64)
3981: fprintf (stderr, "do_setcontext: not implemented\n");
3982: return 0;
3983: #else
3984: if (__get_user(mcp_addr, &ucp->uc_regs))
3985: return 1;
3986:
3987: if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1))
3988: return 1;
3989:
3990: target_to_host_sigset_internal(&blocked, &set);
3991: sigprocmask(SIG_SETMASK, &blocked, NULL);
3992: if (restore_user_regs(env, mcp, sig))
3993: goto sigsegv;
3994:
3995: unlock_user_struct(mcp, mcp_addr, 1);
3996: return 0;
3997:
3998: sigsegv:
3999: unlock_user_struct(mcp, mcp_addr, 1);
4000: return 1;
4001: #endif
4002: }
4003:
4004: long do_rt_sigreturn(CPUState *env)
4005: {
4006: struct target_rt_sigframe *rt_sf = NULL;
4007: target_ulong rt_sf_addr;
4008:
4009: rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16;
4010: if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1))
4011: goto sigsegv;
4012:
4013: if (do_setcontext(&rt_sf->uc, env, 1))
4014: goto sigsegv;
4015:
4016: do_sigaltstack(rt_sf_addr
4017: + offsetof(struct target_rt_sigframe, uc.uc_stack),
4018: 0, env->gpr[1]);
4019:
4020: unlock_user_struct(rt_sf, rt_sf_addr, 1);
4021: return -TARGET_QEMU_ESIGRETURN;
4022:
4023: sigsegv:
4024: unlock_user_struct(rt_sf, rt_sf_addr, 1);
4025: if (logfile)
4026: fprintf (logfile, "segfaulting from do_rt_sigreturn\n");
4027: force_sig(SIGSEGV);
4028: return 0;
4029: }
4030:
1.1.1.9 ! root 4031: #elif defined(TARGET_M68K)
! 4032:
! 4033: struct target_sigcontext {
! 4034: abi_ulong sc_mask;
! 4035: abi_ulong sc_usp;
! 4036: abi_ulong sc_d0;
! 4037: abi_ulong sc_d1;
! 4038: abi_ulong sc_a0;
! 4039: abi_ulong sc_a1;
! 4040: unsigned short sc_sr;
! 4041: abi_ulong sc_pc;
! 4042: };
! 4043:
! 4044: struct target_sigframe
! 4045: {
! 4046: abi_ulong pretcode;
! 4047: int sig;
! 4048: int code;
! 4049: abi_ulong psc;
! 4050: char retcode[8];
! 4051: abi_ulong extramask[TARGET_NSIG_WORDS-1];
! 4052: struct target_sigcontext sc;
! 4053: };
! 4054:
! 4055: typedef int target_greg_t;
! 4056: #define TARGET_NGREG 18
! 4057: typedef target_greg_t target_gregset_t[TARGET_NGREG];
! 4058:
! 4059: typedef struct target_fpregset {
! 4060: int f_fpcntl[3];
! 4061: int f_fpregs[8*3];
! 4062: } target_fpregset_t;
! 4063:
! 4064: struct target_mcontext {
! 4065: int version;
! 4066: target_gregset_t gregs;
! 4067: target_fpregset_t fpregs;
! 4068: };
! 4069:
! 4070: #define TARGET_MCONTEXT_VERSION 2
! 4071:
! 4072: struct target_ucontext {
! 4073: abi_ulong uc_flags;
! 4074: abi_ulong uc_link;
! 4075: target_stack_t uc_stack;
! 4076: struct target_mcontext uc_mcontext;
! 4077: abi_long uc_filler[80];
! 4078: target_sigset_t uc_sigmask;
! 4079: };
! 4080:
! 4081: struct target_rt_sigframe
! 4082: {
! 4083: abi_ulong pretcode;
! 4084: int sig;
! 4085: abi_ulong pinfo;
! 4086: abi_ulong puc;
! 4087: char retcode[8];
! 4088: struct target_siginfo info;
! 4089: struct target_ucontext uc;
! 4090: };
! 4091:
! 4092: static int
! 4093: setup_sigcontext(struct target_sigcontext *sc, CPUState *env, abi_ulong mask)
! 4094: {
! 4095: int err = 0;
! 4096:
! 4097: err |= __put_user(mask, &sc->sc_mask);
! 4098: err |= __put_user(env->aregs[7], &sc->sc_usp);
! 4099: err |= __put_user(env->dregs[0], &sc->sc_d0);
! 4100: err |= __put_user(env->dregs[1], &sc->sc_d1);
! 4101: err |= __put_user(env->aregs[0], &sc->sc_a0);
! 4102: err |= __put_user(env->aregs[1], &sc->sc_a1);
! 4103: err |= __put_user(env->sr, &sc->sc_sr);
! 4104: err |= __put_user(env->pc, &sc->sc_pc);
! 4105:
! 4106: return err;
! 4107: }
! 4108:
! 4109: static int
! 4110: restore_sigcontext(CPUState *env, struct target_sigcontext *sc, int *pd0)
! 4111: {
! 4112: int err = 0;
! 4113: int temp;
! 4114:
! 4115: err |= __get_user(env->aregs[7], &sc->sc_usp);
! 4116: err |= __get_user(env->dregs[1], &sc->sc_d1);
! 4117: err |= __get_user(env->aregs[0], &sc->sc_a0);
! 4118: err |= __get_user(env->aregs[1], &sc->sc_a1);
! 4119: err |= __get_user(env->pc, &sc->sc_pc);
! 4120: err |= __get_user(temp, &sc->sc_sr);
! 4121: env->sr = (env->sr & 0xff00) | (temp & 0xff);
! 4122:
! 4123: *pd0 = tswapl(sc->sc_d0);
! 4124:
! 4125: return err;
! 4126: }
! 4127:
! 4128: /*
! 4129: * Determine which stack to use..
! 4130: */
! 4131: static inline abi_ulong
! 4132: get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
! 4133: {
! 4134: unsigned long sp;
! 4135:
! 4136: sp = regs->aregs[7];
! 4137:
! 4138: /* This is the X/Open sanctioned signal stack switching. */
! 4139: if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
! 4140: sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
! 4141: }
! 4142:
! 4143: return ((sp - frame_size) & -8UL);
! 4144: }
! 4145:
! 4146: static void setup_frame(int sig, struct target_sigaction *ka,
! 4147: target_sigset_t *set, CPUState *env)
! 4148: {
! 4149: struct target_sigframe *frame;
! 4150: abi_ulong frame_addr;
! 4151: abi_ulong retcode_addr;
! 4152: abi_ulong sc_addr;
! 4153: int err = 0;
! 4154: int i;
! 4155:
! 4156: frame_addr = get_sigframe(ka, env, sizeof *frame);
! 4157: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
! 4158: goto give_sigsegv;
! 4159:
! 4160: err |= __put_user(sig, &frame->sig);
! 4161:
! 4162: sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
! 4163: err |= __put_user(sc_addr, &frame->psc);
! 4164:
! 4165: err |= setup_sigcontext(&frame->sc, env, set->sig[0]);
! 4166: if (err)
! 4167: goto give_sigsegv;
! 4168:
! 4169: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
! 4170: if (__put_user(set->sig[i], &frame->extramask[i - 1]))
! 4171: goto give_sigsegv;
! 4172: }
! 4173:
! 4174: /* Set up to return from userspace. */
! 4175:
! 4176: retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
! 4177: err |= __put_user(retcode_addr, &frame->pretcode);
! 4178:
! 4179: /* moveq #,d0; trap #0 */
! 4180:
! 4181: err |= __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16),
! 4182: (long *)(frame->retcode));
! 4183:
! 4184: if (err)
! 4185: goto give_sigsegv;
! 4186:
! 4187: /* Set up to return from userspace */
! 4188:
! 4189: env->aregs[7] = frame_addr;
! 4190: env->pc = ka->_sa_handler;
! 4191:
! 4192: unlock_user_struct(frame, frame_addr, 1);
! 4193: return;
! 4194:
! 4195: give_sigsegv:
! 4196: unlock_user_struct(frame, frame_addr, 1);
! 4197: force_sig(SIGSEGV);
! 4198: }
! 4199:
! 4200: static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
! 4201: CPUState *env)
! 4202: {
! 4203: target_greg_t *gregs = uc->uc_mcontext.gregs;
! 4204: int err;
! 4205:
! 4206: err = __put_user(TARGET_MCONTEXT_VERSION, &uc->uc_mcontext.version);
! 4207: err |= __put_user(env->dregs[0], &gregs[0]);
! 4208: err |= __put_user(env->dregs[1], &gregs[1]);
! 4209: err |= __put_user(env->dregs[2], &gregs[2]);
! 4210: err |= __put_user(env->dregs[3], &gregs[3]);
! 4211: err |= __put_user(env->dregs[4], &gregs[4]);
! 4212: err |= __put_user(env->dregs[5], &gregs[5]);
! 4213: err |= __put_user(env->dregs[6], &gregs[6]);
! 4214: err |= __put_user(env->dregs[7], &gregs[7]);
! 4215: err |= __put_user(env->aregs[0], &gregs[8]);
! 4216: err |= __put_user(env->aregs[1], &gregs[9]);
! 4217: err |= __put_user(env->aregs[2], &gregs[10]);
! 4218: err |= __put_user(env->aregs[3], &gregs[11]);
! 4219: err |= __put_user(env->aregs[4], &gregs[12]);
! 4220: err |= __put_user(env->aregs[5], &gregs[13]);
! 4221: err |= __put_user(env->aregs[6], &gregs[14]);
! 4222: err |= __put_user(env->aregs[7], &gregs[15]);
! 4223: err |= __put_user(env->pc, &gregs[16]);
! 4224: err |= __put_user(env->sr, &gregs[17]);
! 4225:
! 4226: return err;
! 4227: }
! 4228:
! 4229: static inline int target_rt_restore_ucontext(CPUState *env,
! 4230: struct target_ucontext *uc,
! 4231: int *pd0)
! 4232: {
! 4233: int temp;
! 4234: int err;
! 4235: target_greg_t *gregs = uc->uc_mcontext.gregs;
! 4236:
! 4237: err = __get_user(temp, &uc->uc_mcontext.version);
! 4238: if (temp != TARGET_MCONTEXT_VERSION)
! 4239: goto badframe;
! 4240:
! 4241: /* restore passed registers */
! 4242: err |= __get_user(env->dregs[0], &gregs[0]);
! 4243: err |= __get_user(env->dregs[1], &gregs[1]);
! 4244: err |= __get_user(env->dregs[2], &gregs[2]);
! 4245: err |= __get_user(env->dregs[3], &gregs[3]);
! 4246: err |= __get_user(env->dregs[4], &gregs[4]);
! 4247: err |= __get_user(env->dregs[5], &gregs[5]);
! 4248: err |= __get_user(env->dregs[6], &gregs[6]);
! 4249: err |= __get_user(env->dregs[7], &gregs[7]);
! 4250: err |= __get_user(env->aregs[0], &gregs[8]);
! 4251: err |= __get_user(env->aregs[1], &gregs[9]);
! 4252: err |= __get_user(env->aregs[2], &gregs[10]);
! 4253: err |= __get_user(env->aregs[3], &gregs[11]);
! 4254: err |= __get_user(env->aregs[4], &gregs[12]);
! 4255: err |= __get_user(env->aregs[5], &gregs[13]);
! 4256: err |= __get_user(env->aregs[6], &gregs[14]);
! 4257: err |= __get_user(env->aregs[7], &gregs[15]);
! 4258: err |= __get_user(env->pc, &gregs[16]);
! 4259: err |= __get_user(temp, &gregs[17]);
! 4260: env->sr = (env->sr & 0xff00) | (temp & 0xff);
! 4261:
! 4262: *pd0 = env->dregs[0];
! 4263: return err;
! 4264:
! 4265: badframe:
! 4266: return 1;
! 4267: }
! 4268:
! 4269: static void setup_rt_frame(int sig, struct target_sigaction *ka,
! 4270: target_siginfo_t *info,
! 4271: target_sigset_t *set, CPUState *env)
! 4272: {
! 4273: struct target_rt_sigframe *frame;
! 4274: abi_ulong frame_addr;
! 4275: abi_ulong retcode_addr;
! 4276: abi_ulong info_addr;
! 4277: abi_ulong uc_addr;
! 4278: int err = 0;
! 4279: int i;
! 4280:
! 4281: frame_addr = get_sigframe(ka, env, sizeof *frame);
! 4282: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
! 4283: goto give_sigsegv;
! 4284:
! 4285: err |= __put_user(sig, &frame->sig);
! 4286:
! 4287: info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
! 4288: err |= __put_user(info_addr, &frame->pinfo);
! 4289:
! 4290: uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
! 4291: err |= __put_user(uc_addr, &frame->puc);
! 4292:
! 4293: err |= copy_siginfo_to_user(&frame->info, info);
! 4294:
! 4295: /* Create the ucontext */
! 4296:
! 4297: err |= __put_user(0, &frame->uc.uc_flags);
! 4298: err |= __put_user(0, &frame->uc.uc_link);
! 4299: err |= __put_user(target_sigaltstack_used.ss_sp,
! 4300: &frame->uc.uc_stack.ss_sp);
! 4301: err |= __put_user(sas_ss_flags(env->aregs[7]),
! 4302: &frame->uc.uc_stack.ss_flags);
! 4303: err |= __put_user(target_sigaltstack_used.ss_size,
! 4304: &frame->uc.uc_stack.ss_size);
! 4305: err |= target_rt_setup_ucontext(&frame->uc, env);
! 4306:
! 4307: if (err)
! 4308: goto give_sigsegv;
! 4309:
! 4310: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
! 4311: if (__put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]))
! 4312: goto give_sigsegv;
! 4313: }
! 4314:
! 4315: /* Set up to return from userspace. */
! 4316:
! 4317: retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
! 4318: err |= __put_user(retcode_addr, &frame->pretcode);
! 4319:
! 4320: /* moveq #,d0; notb d0; trap #0 */
! 4321:
! 4322: err |= __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
! 4323: (long *)(frame->retcode + 0));
! 4324: err |= __put_user(0x4e40, (short *)(frame->retcode + 4));
! 4325:
! 4326: if (err)
! 4327: goto give_sigsegv;
! 4328:
! 4329: /* Set up to return from userspace */
! 4330:
! 4331: env->aregs[7] = frame_addr;
! 4332: env->pc = ka->_sa_handler;
! 4333:
! 4334: unlock_user_struct(frame, frame_addr, 1);
! 4335: return;
! 4336:
! 4337: give_sigsegv:
! 4338: unlock_user_struct(frame, frame_addr, 1);
! 4339: force_sig(SIGSEGV);
! 4340: }
! 4341:
! 4342: long do_sigreturn(CPUState *env)
! 4343: {
! 4344: struct target_sigframe *frame;
! 4345: abi_ulong frame_addr = env->aregs[7] - 4;
! 4346: target_sigset_t target_set;
! 4347: sigset_t set;
! 4348: int d0, i;
! 4349:
! 4350: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
! 4351: goto badframe;
! 4352:
! 4353: /* set blocked signals */
! 4354:
! 4355: if (__get_user(target_set.sig[0], &frame->sc.sc_mask))
! 4356: goto badframe;
! 4357:
! 4358: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
! 4359: if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
! 4360: goto badframe;
! 4361: }
! 4362:
! 4363: target_to_host_sigset_internal(&set, &target_set);
! 4364: sigprocmask(SIG_SETMASK, &set, NULL);
! 4365:
! 4366: /* restore registers */
! 4367:
! 4368: if (restore_sigcontext(env, &frame->sc, &d0))
! 4369: goto badframe;
! 4370:
! 4371: unlock_user_struct(frame, frame_addr, 0);
! 4372: return d0;
! 4373:
! 4374: badframe:
! 4375: unlock_user_struct(frame, frame_addr, 0);
! 4376: force_sig(TARGET_SIGSEGV);
! 4377: return 0;
! 4378: }
! 4379:
! 4380: long do_rt_sigreturn(CPUState *env)
! 4381: {
! 4382: struct target_rt_sigframe *frame;
! 4383: abi_ulong frame_addr = env->aregs[7] - 4;
! 4384: target_sigset_t target_set;
! 4385: sigset_t set;
! 4386: int d0;
! 4387:
! 4388: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
! 4389: goto badframe;
! 4390:
! 4391: target_to_host_sigset_internal(&set, &target_set);
! 4392: sigprocmask(SIG_SETMASK, &set, NULL);
! 4393:
! 4394: /* restore registers */
! 4395:
! 4396: if (target_rt_restore_ucontext(env, &frame->uc, &d0))
! 4397: goto badframe;
! 4398:
! 4399: if (do_sigaltstack(frame_addr +
! 4400: offsetof(struct target_rt_sigframe, uc.uc_stack),
! 4401: 0, get_sp_from_cpustate(env)) == -EFAULT)
! 4402: goto badframe;
! 4403:
! 4404: unlock_user_struct(frame, frame_addr, 0);
! 4405: return d0;
! 4406:
! 4407: badframe:
! 4408: unlock_user_struct(frame, frame_addr, 0);
! 4409: force_sig(TARGET_SIGSEGV);
! 4410: return 0;
! 4411: }
! 4412:
1.1 root 4413: #else
4414:
1.1.1.7 root 4415: static void setup_frame(int sig, struct target_sigaction *ka,
1.1 root 4416: target_sigset_t *set, CPUState *env)
4417: {
4418: fprintf(stderr, "setup_frame: not implemented\n");
4419: }
4420:
1.1.1.7 root 4421: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1 root 4422: target_siginfo_t *info,
4423: target_sigset_t *set, CPUState *env)
4424: {
4425: fprintf(stderr, "setup_rt_frame: not implemented\n");
4426: }
4427:
4428: long do_sigreturn(CPUState *env)
4429: {
4430: fprintf(stderr, "do_sigreturn: not implemented\n");
1.1.1.6 root 4431: return -TARGET_ENOSYS;
1.1 root 4432: }
4433:
4434: long do_rt_sigreturn(CPUState *env)
4435: {
4436: fprintf(stderr, "do_rt_sigreturn: not implemented\n");
1.1.1.6 root 4437: return -TARGET_ENOSYS;
1.1 root 4438: }
4439:
4440: #endif
4441:
1.1.1.7 root 4442: void process_pending_signals(CPUState *cpu_env)
1.1 root 4443: {
4444: int sig;
1.1.1.6 root 4445: abi_ulong handler;
1.1 root 4446: sigset_t set, old_set;
4447: target_sigset_t target_old_set;
1.1.1.7 root 4448: struct emulated_sigtable *k;
4449: struct target_sigaction *sa;
1.1 root 4450: struct sigqueue *q;
1.1.1.7 root 4451: TaskState *ts = cpu_env->opaque;
1.1.1.6 root 4452:
1.1.1.7 root 4453: if (!ts->signal_pending)
1.1 root 4454: return;
4455:
1.1.1.7 root 4456: /* FIXME: This is not threadsafe. */
4457: k = ts->sigtab;
1.1 root 4458: for(sig = 1; sig <= TARGET_NSIG; sig++) {
4459: if (k->pending)
4460: goto handle_signal;
4461: k++;
4462: }
4463: /* if no signal is pending, just return */
1.1.1.7 root 4464: ts->signal_pending = 0;
1.1 root 4465: return;
4466:
4467: handle_signal:
4468: #ifdef DEBUG_SIGNAL
4469: fprintf(stderr, "qemu: process signal %d\n", sig);
4470: #endif
4471: /* dequeue signal */
4472: q = k->first;
4473: k->first = q->next;
4474: if (!k->first)
4475: k->pending = 0;
1.1.1.6 root 4476:
1.1 root 4477: sig = gdb_handlesig (cpu_env, sig);
4478: if (!sig) {
1.1.1.7 root 4479: sa = NULL;
4480: handler = TARGET_SIG_IGN;
4481: } else {
4482: sa = &sigact_table[sig - 1];
4483: handler = sa->_sa_handler;
1.1 root 4484: }
4485:
4486: if (handler == TARGET_SIG_DFL) {
1.1.1.7 root 4487: /* default handler : ignore some signal. The other are job control or fatal */
4488: if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
4489: kill(getpid(),SIGSTOP);
4490: } else if (sig != TARGET_SIGCHLD &&
4491: sig != TARGET_SIGURG &&
4492: sig != TARGET_SIGWINCH &&
4493: sig != TARGET_SIGCONT) {
1.1 root 4494: force_sig(sig);
4495: }
4496: } else if (handler == TARGET_SIG_IGN) {
4497: /* ignore sig */
4498: } else if (handler == TARGET_SIG_ERR) {
4499: force_sig(sig);
4500: } else {
4501: /* compute the blocked signals during the handler execution */
1.1.1.7 root 4502: target_to_host_sigset(&set, &sa->sa_mask);
1.1 root 4503: /* SA_NODEFER indicates that the current signal should not be
4504: blocked during the handler */
1.1.1.7 root 4505: if (!(sa->sa_flags & TARGET_SA_NODEFER))
1.1 root 4506: sigaddset(&set, target_to_host_signal(sig));
1.1.1.6 root 4507:
1.1 root 4508: /* block signals in the handler using Linux */
4509: sigprocmask(SIG_BLOCK, &set, &old_set);
4510: /* save the previous blocked signal state to restore it at the
4511: end of the signal execution (see do_sigreturn) */
4512: host_to_target_sigset_internal(&target_old_set, &old_set);
4513:
4514: /* if the CPU is in VM86 mode, we restore the 32 bit values */
1.1.1.6 root 4515: #if defined(TARGET_I386) && !defined(TARGET_X86_64)
1.1 root 4516: {
4517: CPUX86State *env = cpu_env;
4518: if (env->eflags & VM_MASK)
4519: save_v86_state(env);
4520: }
4521: #endif
4522: /* prepare the stack frame of the virtual CPU */
1.1.1.7 root 4523: if (sa->sa_flags & TARGET_SA_SIGINFO)
4524: setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
1.1 root 4525: else
1.1.1.7 root 4526: setup_frame(sig, sa, &target_old_set, cpu_env);
4527: if (sa->sa_flags & TARGET_SA_RESETHAND)
4528: sa->_sa_handler = TARGET_SIG_DFL;
1.1 root 4529: }
4530: if (q != &k->info)
1.1.1.7 root 4531: free_sigqueue(cpu_env, q);
1.1 root 4532: }
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