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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
17: * along with this program; if not, write to the Free Software
1.1.1.7 ! root 18: * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
! 19: * MA 02110-1301, USA.
1.1 root 20: */
21: #include <stdlib.h>
22: #include <stdio.h>
23: #include <string.h>
24: #include <stdarg.h>
25: #include <unistd.h>
26: #include <signal.h>
27: #include <errno.h>
28: #include <sys/ucontext.h>
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:
47: static uint8_t host_to_target_signal_table[65] = {
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: };
90: static uint8_t target_to_host_signal_table[65];
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 root 104: static inline int host_to_target_signal(int sig)
105: {
1.1.1.7 ! root 106: if (sig > 64)
! 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: {
1.1.1.7 ! root 113: if (sig > 64)
! 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 root 289: void signal_init(void)
290: {
291: struct sigaction act;
1.1.1.7 ! root 292: struct sigaction oact;
1.1 root 293: int i, j;
1.1.1.7 ! root 294: int host_sig;
1.1 root 295:
296: /* generate signal conversion tables */
297: for(i = 1; i <= 64; i++) {
298: if (host_to_target_signal_table[i] == 0)
299: host_to_target_signal_table[i] = i;
300: }
301: for(i = 1; i <= 64; i++) {
302: j = host_to_target_signal_table[i];
303: target_to_host_signal_table[j] = i;
304: }
1.1.1.6 root 305:
1.1 root 306: /* set all host signal handlers. ALL signals are blocked during
307: the handlers to serialize them. */
1.1.1.7 ! root 308: memset(sigact_table, 0, sizeof(sigact_table));
! 309:
1.1 root 310: sigfillset(&act.sa_mask);
311: act.sa_flags = SA_SIGINFO;
312: act.sa_sigaction = host_signal_handler;
1.1.1.7 ! root 313: for(i = 1; i <= TARGET_NSIG; i++) {
! 314: host_sig = target_to_host_signal(i);
! 315: sigaction(host_sig, NULL, &oact);
! 316: if (oact.sa_sigaction == (void *)SIG_IGN) {
! 317: sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
! 318: } else if (oact.sa_sigaction == (void *)SIG_DFL) {
! 319: sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
! 320: }
! 321: /* If there's already a handler installed then something has
! 322: gone horribly wrong, so don't even try to handle that case. */
! 323: /* Install some handlers for our own use. We need at least
! 324: SIGSEGV and SIGBUS, to detect exceptions. We can not just
! 325: trap all signals because it affects syscall interrupt
! 326: behavior. But do trap all default-fatal signals. */
! 327: if (fatal_signal (i))
! 328: sigaction(host_sig, &act, NULL);
1.1 root 329: }
330: }
331:
332: /* signal queue handling */
333:
1.1.1.7 ! root 334: static inline struct sigqueue *alloc_sigqueue(CPUState *env)
1.1 root 335: {
1.1.1.7 ! root 336: TaskState *ts = env->opaque;
! 337: struct sigqueue *q = ts->first_free;
1.1 root 338: if (!q)
339: return NULL;
1.1.1.7 ! root 340: ts->first_free = q->next;
1.1 root 341: return q;
342: }
343:
1.1.1.7 ! root 344: static inline void free_sigqueue(CPUState *env, struct sigqueue *q)
1.1 root 345: {
1.1.1.7 ! root 346: TaskState *ts = env->opaque;
! 347: q->next = ts->first_free;
! 348: ts->first_free = q;
1.1 root 349: }
350:
351: /* abort execution with signal */
1.1.1.7 ! root 352: static void QEMU_NORETURN force_sig(int sig)
1.1 root 353: {
354: int host_sig;
355: host_sig = target_to_host_signal(sig);
1.1.1.6 root 356: fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
1.1 root 357: sig, strsignal(host_sig));
358: #if 1
1.1.1.7 ! root 359: gdb_signalled(thread_env, sig);
1.1 root 360: _exit(-host_sig);
361: #else
362: {
363: struct sigaction act;
364: sigemptyset(&act.sa_mask);
365: act.sa_flags = SA_SIGINFO;
366: act.sa_sigaction = SIG_DFL;
367: sigaction(SIGABRT, &act, NULL);
368: abort();
369: }
370: #endif
371: }
372:
373: /* queue a signal so that it will be send to the virtual CPU as soon
374: as possible */
1.1.1.7 ! root 375: int queue_signal(CPUState *env, int sig, target_siginfo_t *info)
1.1 root 376: {
1.1.1.7 ! root 377: TaskState *ts = env->opaque;
! 378: struct emulated_sigtable *k;
1.1 root 379: struct sigqueue *q, **pq;
1.1.1.6 root 380: abi_ulong handler;
1.1.1.7 ! root 381: int queue;
1.1 root 382:
383: #if defined(DEBUG_SIGNAL)
1.1.1.6 root 384: fprintf(stderr, "queue_signal: sig=%d\n",
1.1 root 385: sig);
386: #endif
1.1.1.7 ! root 387: k = &ts->sigtab[sig - 1];
! 388: queue = gdb_queuesig ();
! 389: handler = sigact_table[sig - 1]._sa_handler;
! 390: if (!queue && handler == TARGET_SIG_DFL) {
! 391: if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
! 392: kill(getpid(),SIGSTOP);
! 393: return 0;
! 394: } else
1.1 root 395: /* default handler : ignore some signal. The other are fatal */
1.1.1.6 root 396: if (sig != TARGET_SIGCHLD &&
397: sig != TARGET_SIGURG &&
1.1.1.7 ! root 398: sig != TARGET_SIGWINCH &&
! 399: sig != TARGET_SIGCONT) {
1.1 root 400: force_sig(sig);
401: } else {
402: return 0; /* indicate ignored */
403: }
1.1.1.7 ! root 404: } else if (!queue && handler == TARGET_SIG_IGN) {
1.1 root 405: /* ignore signal */
406: return 0;
1.1.1.7 ! root 407: } else if (!queue && handler == TARGET_SIG_ERR) {
1.1 root 408: force_sig(sig);
409: } else {
410: pq = &k->first;
411: if (sig < TARGET_SIGRTMIN) {
412: /* if non real time signal, we queue exactly one signal */
413: if (!k->pending)
414: q = &k->info;
415: else
416: return 0;
417: } else {
418: if (!k->pending) {
419: /* first signal */
420: q = &k->info;
421: } else {
1.1.1.7 ! root 422: q = alloc_sigqueue(env);
1.1 root 423: if (!q)
424: return -EAGAIN;
425: while (*pq != NULL)
426: pq = &(*pq)->next;
427: }
428: }
429: *pq = q;
430: q->info = *info;
431: q->next = NULL;
432: k->pending = 1;
433: /* signal that a new signal is pending */
1.1.1.7 ! root 434: ts->signal_pending = 1;
1.1 root 435: return 1; /* indicates that the signal was queued */
436: }
437: }
438:
1.1.1.6 root 439: static void host_signal_handler(int host_signum, siginfo_t *info,
1.1 root 440: void *puc)
441: {
442: int sig;
443: target_siginfo_t tinfo;
444:
445: /* the CPU emulator uses some host signals to detect exceptions,
1.1.1.7 ! root 446: we forward to it some signals */
! 447: if ((host_signum == SIGSEGV || host_signum == SIGBUS)
! 448: && info->si_code > 0) {
1.1 root 449: if (cpu_signal_handler(host_signum, info, puc))
450: return;
451: }
452:
453: /* get target signal number */
454: sig = host_to_target_signal(host_signum);
455: if (sig < 1 || sig > TARGET_NSIG)
456: return;
457: #if defined(DEBUG_SIGNAL)
458: fprintf(stderr, "qemu: got signal %d\n", sig);
459: #endif
460: host_to_target_siginfo_noswap(&tinfo, info);
1.1.1.7 ! root 461: if (queue_signal(thread_env, sig, &tinfo) == 1) {
1.1 root 462: /* interrupt the virtual CPU as soon as possible */
1.1.1.7 ! root 463: cpu_interrupt(thread_env, CPU_INTERRUPT_EXIT);
1.1 root 464: }
465: }
466:
1.1.1.6 root 467: /* do_sigaltstack() returns target values and errnos. */
468: /* compare linux/kernel/signal.c:do_sigaltstack() */
469: abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
470: {
471: int ret;
472: struct target_sigaltstack oss;
473:
474: /* XXX: test errors */
475: if(uoss_addr)
476: {
477: __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
478: __put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
479: __put_user(sas_ss_flags(sp), &oss.ss_flags);
480: }
481:
482: if(uss_addr)
483: {
484: struct target_sigaltstack *uss;
485: struct target_sigaltstack ss;
486:
487: ret = -TARGET_EFAULT;
488: if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)
489: || __get_user(ss.ss_sp, &uss->ss_sp)
490: || __get_user(ss.ss_size, &uss->ss_size)
491: || __get_user(ss.ss_flags, &uss->ss_flags))
492: goto out;
493: unlock_user_struct(uss, uss_addr, 0);
494:
495: ret = -TARGET_EPERM;
496: if (on_sig_stack(sp))
497: goto out;
498:
499: ret = -TARGET_EINVAL;
500: if (ss.ss_flags != TARGET_SS_DISABLE
501: && ss.ss_flags != TARGET_SS_ONSTACK
502: && ss.ss_flags != 0)
503: goto out;
504:
505: if (ss.ss_flags == TARGET_SS_DISABLE) {
506: ss.ss_size = 0;
507: ss.ss_sp = 0;
508: } else {
509: ret = -TARGET_ENOMEM;
510: if (ss.ss_size < MINSIGSTKSZ)
511: goto out;
512: }
513:
514: target_sigaltstack_used.ss_sp = ss.ss_sp;
515: target_sigaltstack_used.ss_size = ss.ss_size;
516: }
517:
518: if (uoss_addr) {
519: ret = -TARGET_EFAULT;
520: if (copy_to_user(uoss_addr, &oss, sizeof(oss)))
521: goto out;
522: }
523:
524: ret = 0;
525: out:
526: return ret;
527: }
528:
529: /* do_sigaction() return host values and errnos */
1.1 root 530: int do_sigaction(int sig, const struct target_sigaction *act,
531: struct target_sigaction *oact)
532: {
1.1.1.7 ! root 533: struct target_sigaction *k;
1.1 root 534: struct sigaction act1;
535: int host_sig;
1.1.1.6 root 536: int ret = 0;
1.1 root 537:
1.1.1.7 ! root 538: if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP)
1.1 root 539: return -EINVAL;
540: k = &sigact_table[sig - 1];
541: #if defined(DEBUG_SIGNAL)
1.1.1.6 root 542: fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
1.1 root 543: sig, (int)act, (int)oact);
544: #endif
545: if (oact) {
1.1.1.7 ! root 546: oact->_sa_handler = tswapl(k->_sa_handler);
! 547: oact->sa_flags = tswapl(k->sa_flags);
1.1.1.6 root 548: #if !defined(TARGET_MIPS)
1.1.1.7 ! root 549: oact->sa_restorer = tswapl(k->sa_restorer);
1.1.1.6 root 550: #endif
1.1.1.7 ! root 551: oact->sa_mask = k->sa_mask;
1.1 root 552: }
553: if (act) {
1.1.1.7 ! root 554: /* FIXME: This is not threadsafe. */
! 555: k->_sa_handler = tswapl(act->_sa_handler);
! 556: k->sa_flags = tswapl(act->sa_flags);
1.1.1.6 root 557: #if !defined(TARGET_MIPS)
1.1.1.7 ! root 558: k->sa_restorer = tswapl(act->sa_restorer);
1.1.1.6 root 559: #endif
1.1.1.7 ! root 560: k->sa_mask = act->sa_mask;
1.1 root 561:
562: /* we update the host linux signal state */
563: host_sig = target_to_host_signal(sig);
564: if (host_sig != SIGSEGV && host_sig != SIGBUS) {
565: sigfillset(&act1.sa_mask);
566: act1.sa_flags = SA_SIGINFO;
1.1.1.7 ! root 567: if (k->sa_flags & TARGET_SA_RESTART)
1.1 root 568: act1.sa_flags |= SA_RESTART;
569: /* NOTE: it is important to update the host kernel signal
570: ignore state to avoid getting unexpected interrupted
571: syscalls */
1.1.1.7 ! root 572: if (k->_sa_handler == TARGET_SIG_IGN) {
1.1 root 573: act1.sa_sigaction = (void *)SIG_IGN;
1.1.1.7 ! root 574: } else if (k->_sa_handler == TARGET_SIG_DFL) {
! 575: if (fatal_signal (sig))
! 576: act1.sa_sigaction = host_signal_handler;
! 577: else
! 578: act1.sa_sigaction = (void *)SIG_DFL;
1.1 root 579: } else {
580: act1.sa_sigaction = host_signal_handler;
581: }
1.1.1.6 root 582: ret = sigaction(host_sig, &act1, NULL);
1.1 root 583: }
584: }
1.1.1.6 root 585: return ret;
1.1 root 586: }
587:
1.1.1.6 root 588: static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
1.1 root 589: const target_siginfo_t *info)
590: {
591: tswap_siginfo(tinfo, info);
592: return 0;
593: }
594:
1.1.1.6 root 595: static inline int current_exec_domain_sig(int sig)
596: {
597: return /* current->exec_domain && current->exec_domain->signal_invmap
598: && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
599: }
600:
601: #if defined(TARGET_I386) && TARGET_ABI_BITS == 32
1.1 root 602:
603: /* from the Linux kernel */
604:
605: struct target_fpreg {
606: uint16_t significand[4];
607: uint16_t exponent;
608: };
609:
610: struct target_fpxreg {
611: uint16_t significand[4];
612: uint16_t exponent;
613: uint16_t padding[3];
614: };
615:
616: struct target_xmmreg {
1.1.1.6 root 617: abi_ulong element[4];
1.1 root 618: };
619:
620: struct target_fpstate {
621: /* Regular FPU environment */
1.1.1.6 root 622: abi_ulong cw;
623: abi_ulong sw;
624: abi_ulong tag;
625: abi_ulong ipoff;
626: abi_ulong cssel;
627: abi_ulong dataoff;
628: abi_ulong datasel;
1.1 root 629: struct target_fpreg _st[8];
630: uint16_t status;
631: uint16_t magic; /* 0xffff = regular FPU data only */
632:
633: /* FXSR FPU environment */
1.1.1.6 root 634: abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
635: abi_ulong mxcsr;
636: abi_ulong reserved;
1.1 root 637: struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
638: struct target_xmmreg _xmm[8];
1.1.1.6 root 639: abi_ulong padding[56];
1.1 root 640: };
641:
642: #define X86_FXSR_MAGIC 0x0000
643:
644: struct target_sigcontext {
645: uint16_t gs, __gsh;
646: uint16_t fs, __fsh;
647: uint16_t es, __esh;
648: uint16_t ds, __dsh;
1.1.1.6 root 649: abi_ulong edi;
650: abi_ulong esi;
651: abi_ulong ebp;
652: abi_ulong esp;
653: abi_ulong ebx;
654: abi_ulong edx;
655: abi_ulong ecx;
656: abi_ulong eax;
657: abi_ulong trapno;
658: abi_ulong err;
659: abi_ulong eip;
1.1 root 660: uint16_t cs, __csh;
1.1.1.6 root 661: abi_ulong eflags;
662: abi_ulong esp_at_signal;
1.1 root 663: uint16_t ss, __ssh;
1.1.1.6 root 664: abi_ulong fpstate; /* pointer */
665: abi_ulong oldmask;
666: abi_ulong cr2;
1.1 root 667: };
668:
669: struct target_ucontext {
1.1.1.6 root 670: abi_ulong tuc_flags;
671: abi_ulong tuc_link;
1.1 root 672: target_stack_t tuc_stack;
673: struct target_sigcontext tuc_mcontext;
674: target_sigset_t tuc_sigmask; /* mask last for extensibility */
675: };
676:
677: struct sigframe
678: {
1.1.1.6 root 679: abi_ulong pretcode;
1.1 root 680: int sig;
681: struct target_sigcontext sc;
682: struct target_fpstate fpstate;
1.1.1.6 root 683: abi_ulong extramask[TARGET_NSIG_WORDS-1];
1.1 root 684: char retcode[8];
685: };
686:
687: struct rt_sigframe
688: {
1.1.1.6 root 689: abi_ulong pretcode;
1.1 root 690: int sig;
1.1.1.6 root 691: abi_ulong pinfo;
692: abi_ulong puc;
1.1 root 693: struct target_siginfo info;
694: struct target_ucontext uc;
695: struct target_fpstate fpstate;
696: char retcode[8];
697: };
698:
699: /*
700: * Set up a signal frame.
701: */
702:
703: /* XXX: save x87 state */
704: static int
705: setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
1.1.1.6 root 706: CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr)
1.1 root 707: {
708: int err = 0;
1.1.1.6 root 709: uint16_t magic;
1.1 root 710:
1.1.1.6 root 711: /* already locked in setup_frame() */
1.1 root 712: err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
713: err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
714: err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
715: err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
716: err |= __put_user(env->regs[R_EDI], &sc->edi);
717: err |= __put_user(env->regs[R_ESI], &sc->esi);
718: err |= __put_user(env->regs[R_EBP], &sc->ebp);
719: err |= __put_user(env->regs[R_ESP], &sc->esp);
720: err |= __put_user(env->regs[R_EBX], &sc->ebx);
721: err |= __put_user(env->regs[R_EDX], &sc->edx);
722: err |= __put_user(env->regs[R_ECX], &sc->ecx);
723: err |= __put_user(env->regs[R_EAX], &sc->eax);
724: err |= __put_user(env->exception_index, &sc->trapno);
725: err |= __put_user(env->error_code, &sc->err);
726: err |= __put_user(env->eip, &sc->eip);
727: err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
728: err |= __put_user(env->eflags, &sc->eflags);
729: err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
730: err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
731:
1.1.1.6 root 732: cpu_x86_fsave(env, fpstate_addr, 1);
1.1 root 733: fpstate->status = fpstate->sw;
1.1.1.6 root 734: magic = 0xffff;
735: err |= __put_user(magic, &fpstate->magic);
736: err |= __put_user(fpstate_addr, &sc->fpstate);
1.1 root 737:
738: /* non-iBCS2 extensions.. */
739: err |= __put_user(mask, &sc->oldmask);
740: err |= __put_user(env->cr[2], &sc->cr2);
741: return err;
742: }
743:
744: /*
745: * Determine which stack to use..
746: */
747:
1.1.1.6 root 748: static inline abi_ulong
1.1.1.7 ! root 749: get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
1.1 root 750: {
751: unsigned long esp;
752:
753: /* Default to using normal stack */
754: esp = env->regs[R_ESP];
755: /* This is the X/Open sanctioned signal stack switching. */
1.1.1.7 ! root 756: if (ka->sa_flags & TARGET_SA_ONSTACK) {
1.1.1.6 root 757: if (sas_ss_flags(esp) == 0)
758: esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
759: }
1.1 root 760:
761: /* This is the legacy signal stack switching. */
1.1.1.6 root 762: else
1.1 root 763: if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
1.1.1.7 ! root 764: !(ka->sa_flags & TARGET_SA_RESTORER) &&
! 765: ka->sa_restorer) {
! 766: esp = (unsigned long) ka->sa_restorer;
1.1 root 767: }
1.1.1.6 root 768: return (esp - frame_size) & -8ul;
1.1 root 769: }
770:
1.1.1.6 root 771: /* compare linux/arch/i386/kernel/signal.c:setup_frame() */
1.1.1.7 ! root 772: static void setup_frame(int sig, struct target_sigaction *ka,
1.1 root 773: target_sigset_t *set, CPUX86State *env)
774: {
1.1.1.6 root 775: abi_ulong frame_addr;
1.1 root 776: struct sigframe *frame;
777: int i, err = 0;
778:
1.1.1.6 root 779: frame_addr = get_sigframe(ka, env, sizeof(*frame));
1.1 root 780:
1.1.1.6 root 781: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1.1 root 782: goto give_sigsegv;
1.1.1.6 root 783:
784: err |= __put_user(current_exec_domain_sig(sig),
1.1 root 785: &frame->sig);
786: if (err)
787: goto give_sigsegv;
788:
1.1.1.6 root 789: setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
790: frame_addr + offsetof(struct sigframe, fpstate));
1.1 root 791: if (err)
792: goto give_sigsegv;
793:
794: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
795: if (__put_user(set->sig[i], &frame->extramask[i - 1]))
796: goto give_sigsegv;
797: }
798:
799: /* Set up to return from userspace. If provided, use a stub
800: already in userspace. */
1.1.1.7 ! root 801: if (ka->sa_flags & TARGET_SA_RESTORER) {
! 802: err |= __put_user(ka->sa_restorer, &frame->pretcode);
1.1 root 803: } else {
1.1.1.6 root 804: uint16_t val16;
805: abi_ulong retcode_addr;
806: retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
807: err |= __put_user(retcode_addr, &frame->pretcode);
1.1 root 808: /* This is popl %eax ; movl $,%eax ; int $0x80 */
1.1.1.6 root 809: val16 = 0xb858;
810: err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
1.1 root 811: err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
1.1.1.6 root 812: val16 = 0x80cd;
813: err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
1.1 root 814: }
815:
816: if (err)
817: goto give_sigsegv;
818:
819: /* Set up registers for signal handler */
1.1.1.6 root 820: env->regs[R_ESP] = frame_addr;
1.1.1.7 ! root 821: env->eip = ka->_sa_handler;
1.1 root 822:
823: cpu_x86_load_seg(env, R_DS, __USER_DS);
824: cpu_x86_load_seg(env, R_ES, __USER_DS);
825: cpu_x86_load_seg(env, R_SS, __USER_DS);
826: cpu_x86_load_seg(env, R_CS, __USER_CS);
827: env->eflags &= ~TF_MASK;
828:
1.1.1.6 root 829: unlock_user_struct(frame, frame_addr, 1);
830:
1.1 root 831: return;
832:
833: give_sigsegv:
1.1.1.6 root 834: unlock_user_struct(frame, frame_addr, 1);
1.1 root 835: if (sig == TARGET_SIGSEGV)
1.1.1.7 ! root 836: ka->_sa_handler = TARGET_SIG_DFL;
1.1 root 837: force_sig(TARGET_SIGSEGV /* , current */);
838: }
839:
1.1.1.6 root 840: /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
1.1.1.7 ! root 841: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1 root 842: target_siginfo_t *info,
843: target_sigset_t *set, CPUX86State *env)
844: {
1.1.1.6 root 845: abi_ulong frame_addr, addr;
1.1 root 846: struct rt_sigframe *frame;
847: int i, err = 0;
848:
1.1.1.6 root 849: frame_addr = get_sigframe(ka, env, sizeof(*frame));
1.1 root 850:
1.1.1.6 root 851: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1.1 root 852: goto give_sigsegv;
853:
1.1.1.6 root 854: err |= __put_user(current_exec_domain_sig(sig),
1.1 root 855: &frame->sig);
1.1.1.6 root 856: addr = frame_addr + offsetof(struct rt_sigframe, info);
857: err |= __put_user(addr, &frame->pinfo);
858: addr = frame_addr + offsetof(struct rt_sigframe, uc);
859: err |= __put_user(addr, &frame->puc);
1.1 root 860: err |= copy_siginfo_to_user(&frame->info, info);
861: if (err)
862: goto give_sigsegv;
863:
864: /* Create the ucontext. */
865: err |= __put_user(0, &frame->uc.tuc_flags);
866: err |= __put_user(0, &frame->uc.tuc_link);
1.1.1.6 root 867: err |= __put_user(target_sigaltstack_used.ss_sp,
1.1 root 868: &frame->uc.tuc_stack.ss_sp);
1.1.1.6 root 869: err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
1.1 root 870: &frame->uc.tuc_stack.ss_flags);
1.1.1.6 root 871: err |= __put_user(target_sigaltstack_used.ss_size,
1.1 root 872: &frame->uc.tuc_stack.ss_size);
873: err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
1.1.1.6 root 874: env, set->sig[0],
875: frame_addr + offsetof(struct rt_sigframe, fpstate));
1.1 root 876: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
877: if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
878: goto give_sigsegv;
879: }
880:
881: /* Set up to return from userspace. If provided, use a stub
882: already in userspace. */
1.1.1.7 ! root 883: if (ka->sa_flags & TARGET_SA_RESTORER) {
! 884: err |= __put_user(ka->sa_restorer, &frame->pretcode);
1.1 root 885: } else {
1.1.1.6 root 886: uint16_t val16;
887: addr = frame_addr + offsetof(struct rt_sigframe, retcode);
888: err |= __put_user(addr, &frame->pretcode);
1.1 root 889: /* This is movl $,%eax ; int $0x80 */
1.1.1.6 root 890: err |= __put_user(0xb8, (char *)(frame->retcode+0));
1.1 root 891: err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
1.1.1.6 root 892: val16 = 0x80cd;
893: err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
1.1 root 894: }
895:
896: if (err)
897: goto give_sigsegv;
898:
899: /* Set up registers for signal handler */
1.1.1.6 root 900: env->regs[R_ESP] = frame_addr;
1.1.1.7 ! root 901: env->eip = ka->_sa_handler;
1.1 root 902:
903: cpu_x86_load_seg(env, R_DS, __USER_DS);
904: cpu_x86_load_seg(env, R_ES, __USER_DS);
905: cpu_x86_load_seg(env, R_SS, __USER_DS);
906: cpu_x86_load_seg(env, R_CS, __USER_CS);
907: env->eflags &= ~TF_MASK;
908:
1.1.1.6 root 909: unlock_user_struct(frame, frame_addr, 1);
910:
1.1 root 911: return;
912:
913: give_sigsegv:
1.1.1.6 root 914: unlock_user_struct(frame, frame_addr, 1);
1.1 root 915: if (sig == TARGET_SIGSEGV)
1.1.1.7 ! root 916: ka->_sa_handler = TARGET_SIG_DFL;
1.1 root 917: force_sig(TARGET_SIGSEGV /* , current */);
918: }
919:
920: static int
921: restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
922: {
923: unsigned int err = 0;
1.1.1.6 root 924: abi_ulong fpstate_addr;
925: unsigned int tmpflags;
1.1 root 926:
1.1.1.6 root 927: cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
928: cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
929: cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
930: cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
931:
932: env->regs[R_EDI] = tswapl(sc->edi);
933: env->regs[R_ESI] = tswapl(sc->esi);
934: env->regs[R_EBP] = tswapl(sc->ebp);
935: env->regs[R_ESP] = tswapl(sc->esp);
936: env->regs[R_EBX] = tswapl(sc->ebx);
937: env->regs[R_EDX] = tswapl(sc->edx);
938: env->regs[R_ECX] = tswapl(sc->ecx);
939: env->eip = tswapl(sc->eip);
1.1 root 940:
941: cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
942: cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
943:
1.1.1.6 root 944: tmpflags = tswapl(sc->eflags);
945: env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
946: // regs->orig_eax = -1; /* disable syscall checks */
947:
948: fpstate_addr = tswapl(sc->fpstate);
949: if (fpstate_addr != 0) {
950: if (!access_ok(VERIFY_READ, fpstate_addr,
951: sizeof(struct target_fpstate)))
952: goto badframe;
953: cpu_x86_frstor(env, fpstate_addr, 1);
1.1 root 954: }
955:
1.1.1.6 root 956: *peax = tswapl(sc->eax);
1.1 root 957: return err;
958: badframe:
959: return 1;
960: }
961:
962: long do_sigreturn(CPUX86State *env)
963: {
1.1.1.6 root 964: struct sigframe *frame;
965: abi_ulong frame_addr = env->regs[R_ESP] - 8;
1.1 root 966: target_sigset_t target_set;
967: sigset_t set;
968: int eax, i;
969:
970: #if defined(DEBUG_SIGNAL)
971: fprintf(stderr, "do_sigreturn\n");
972: #endif
1.1.1.6 root 973: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
974: goto badframe;
1.1 root 975: /* set blocked signals */
976: if (__get_user(target_set.sig[0], &frame->sc.oldmask))
977: goto badframe;
978: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
979: if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
980: goto badframe;
981: }
982:
983: target_to_host_sigset_internal(&set, &target_set);
984: sigprocmask(SIG_SETMASK, &set, NULL);
1.1.1.6 root 985:
1.1 root 986: /* restore registers */
987: if (restore_sigcontext(env, &frame->sc, &eax))
988: goto badframe;
1.1.1.6 root 989: unlock_user_struct(frame, frame_addr, 0);
1.1 root 990: return eax;
991:
992: badframe:
1.1.1.6 root 993: unlock_user_struct(frame, frame_addr, 0);
1.1 root 994: force_sig(TARGET_SIGSEGV);
995: return 0;
996: }
997:
998: long do_rt_sigreturn(CPUX86State *env)
999: {
1.1.1.6 root 1000: abi_ulong frame_addr;
1001: struct rt_sigframe *frame;
1.1 root 1002: sigset_t set;
1003: int eax;
1004:
1.1.1.6 root 1005: frame_addr = env->regs[R_ESP] - 4;
1006: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1007: goto badframe;
1.1 root 1008: target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
1009: sigprocmask(SIG_SETMASK, &set, NULL);
1.1.1.6 root 1010:
1.1 root 1011: if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
1012: goto badframe;
1013:
1.1.1.6 root 1014: if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
1015: get_sp_from_cpustate(env)) == -EFAULT)
1.1 root 1016: goto badframe;
1.1.1.6 root 1017:
1018: unlock_user_struct(frame, frame_addr, 0);
1.1 root 1019: return eax;
1020:
1021: badframe:
1.1.1.6 root 1022: unlock_user_struct(frame, frame_addr, 0);
1023: force_sig(TARGET_SIGSEGV);
1.1 root 1024: return 0;
1025: }
1026:
1027: #elif defined(TARGET_ARM)
1028:
1029: struct target_sigcontext {
1.1.1.6 root 1030: abi_ulong trap_no;
1031: abi_ulong error_code;
1032: abi_ulong oldmask;
1033: abi_ulong arm_r0;
1034: abi_ulong arm_r1;
1035: abi_ulong arm_r2;
1036: abi_ulong arm_r3;
1037: abi_ulong arm_r4;
1038: abi_ulong arm_r5;
1039: abi_ulong arm_r6;
1040: abi_ulong arm_r7;
1041: abi_ulong arm_r8;
1042: abi_ulong arm_r9;
1043: abi_ulong arm_r10;
1044: abi_ulong arm_fp;
1045: abi_ulong arm_ip;
1046: abi_ulong arm_sp;
1047: abi_ulong arm_lr;
1048: abi_ulong arm_pc;
1049: abi_ulong arm_cpsr;
1050: abi_ulong fault_address;
1051: };
1.1 root 1052:
1.1.1.7 ! root 1053: struct target_ucontext_v1 {
1.1.1.6 root 1054: abi_ulong tuc_flags;
1055: abi_ulong tuc_link;
1.1 root 1056: target_stack_t tuc_stack;
1057: struct target_sigcontext tuc_mcontext;
1058: target_sigset_t tuc_sigmask; /* mask last for extensibility */
1059: };
1060:
1.1.1.7 ! root 1061: struct target_ucontext_v2 {
! 1062: abi_ulong tuc_flags;
! 1063: abi_ulong tuc_link;
! 1064: target_stack_t tuc_stack;
! 1065: struct target_sigcontext tuc_mcontext;
! 1066: target_sigset_t tuc_sigmask; /* mask last for extensibility */
! 1067: char __unused[128 - sizeof(sigset_t)];
! 1068: abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
! 1069: };
! 1070:
! 1071: struct sigframe_v1
1.1 root 1072: {
1073: struct target_sigcontext sc;
1.1.1.6 root 1074: abi_ulong extramask[TARGET_NSIG_WORDS-1];
1075: abi_ulong retcode;
1.1 root 1076: };
1077:
1.1.1.7 ! root 1078: struct sigframe_v2
! 1079: {
! 1080: struct target_ucontext_v2 uc;
! 1081: abi_ulong retcode;
! 1082: };
! 1083:
! 1084: struct rt_sigframe_v1
1.1 root 1085: {
1.1.1.6 root 1086: abi_ulong pinfo;
1087: abi_ulong puc;
1.1 root 1088: struct target_siginfo info;
1.1.1.7 ! root 1089: struct target_ucontext_v1 uc;
! 1090: abi_ulong retcode;
! 1091: };
! 1092:
! 1093: struct rt_sigframe_v2
! 1094: {
! 1095: struct target_siginfo info;
! 1096: struct target_ucontext_v2 uc;
1.1.1.6 root 1097: abi_ulong retcode;
1.1 root 1098: };
1099:
1100: #define TARGET_CONFIG_CPU_32 1
1101:
1102: /*
1103: * For ARM syscalls, we encode the syscall number into the instruction.
1104: */
1105: #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
1106: #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
1107:
1108: /*
1109: * For Thumb syscalls, we pass the syscall number via r7. We therefore
1110: * need two 16-bit instructions.
1111: */
1112: #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
1113: #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
1114:
1.1.1.6 root 1115: static const abi_ulong retcodes[4] = {
1.1 root 1116: SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
1117: SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
1118: };
1119:
1120:
1121: #define __get_user_error(x,p,e) __get_user(x, p)
1122:
1123: static inline int valid_user_regs(CPUState *regs)
1124: {
1125: return 1;
1126: }
1127:
1.1.1.7 ! root 1128: static void
1.1 root 1129: setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1.1.1.6 root 1130: CPUState *env, abi_ulong mask)
1.1 root 1131: {
1.1.1.7 ! root 1132: __put_user(env->regs[0], &sc->arm_r0);
! 1133: __put_user(env->regs[1], &sc->arm_r1);
! 1134: __put_user(env->regs[2], &sc->arm_r2);
! 1135: __put_user(env->regs[3], &sc->arm_r3);
! 1136: __put_user(env->regs[4], &sc->arm_r4);
! 1137: __put_user(env->regs[5], &sc->arm_r5);
! 1138: __put_user(env->regs[6], &sc->arm_r6);
! 1139: __put_user(env->regs[7], &sc->arm_r7);
! 1140: __put_user(env->regs[8], &sc->arm_r8);
! 1141: __put_user(env->regs[9], &sc->arm_r9);
! 1142: __put_user(env->regs[10], &sc->arm_r10);
! 1143: __put_user(env->regs[11], &sc->arm_fp);
! 1144: __put_user(env->regs[12], &sc->arm_ip);
! 1145: __put_user(env->regs[13], &sc->arm_sp);
! 1146: __put_user(env->regs[14], &sc->arm_lr);
! 1147: __put_user(env->regs[15], &sc->arm_pc);
1.1 root 1148: #ifdef TARGET_CONFIG_CPU_32
1.1.1.7 ! root 1149: __put_user(cpsr_read(env), &sc->arm_cpsr);
1.1 root 1150: #endif
1151:
1.1.1.7 ! root 1152: __put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
! 1153: __put_user(/* current->thread.error_code */ 0, &sc->error_code);
! 1154: __put_user(/* current->thread.address */ 0, &sc->fault_address);
! 1155: __put_user(mask, &sc->oldmask);
1.1 root 1156: }
1157:
1.1.1.6 root 1158: static inline abi_ulong
1.1.1.7 ! root 1159: get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize)
1.1 root 1160: {
1161: unsigned long sp = regs->regs[13];
1162:
1163: /*
1164: * This is the X/Open sanctioned signal stack switching.
1165: */
1.1.1.7 ! root 1166: if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
1.1.1.6 root 1167: sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1.1 root 1168: /*
1169: * ATPCS B01 mandates 8-byte alignment
1170: */
1.1.1.6 root 1171: return (sp - framesize) & ~7;
1.1 root 1172: }
1173:
1174: static int
1.1.1.7 ! root 1175: setup_return(CPUState *env, struct target_sigaction *ka,
1.1.1.6 root 1176: abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
1.1 root 1177: {
1.1.1.7 ! root 1178: abi_ulong handler = ka->_sa_handler;
1.1.1.6 root 1179: abi_ulong retcode;
1.1.1.7 ! root 1180: int thumb = handler & 1;
1.1 root 1181:
1.1.1.7 ! root 1182: if (ka->sa_flags & TARGET_SA_RESTORER) {
! 1183: retcode = ka->sa_restorer;
1.1 root 1184: } else {
1185: unsigned int idx = thumb;
1186:
1.1.1.7 ! root 1187: if (ka->sa_flags & TARGET_SA_SIGINFO)
1.1 root 1188: idx += 2;
1189:
1190: if (__put_user(retcodes[idx], rc))
1191: return 1;
1192: #if 0
1.1.1.6 root 1193: flush_icache_range((abi_ulong)rc,
1194: (abi_ulong)(rc + 1));
1.1 root 1195: #endif
1.1.1.6 root 1196: retcode = rc_addr + thumb;
1.1 root 1197: }
1198:
1199: env->regs[0] = usig;
1.1.1.6 root 1200: env->regs[13] = frame_addr;
1.1 root 1201: env->regs[14] = retcode;
1202: env->regs[15] = handler & (thumb ? ~1 : ~3);
1.1.1.7 ! root 1203: env->thumb = thumb;
1.1 root 1204:
1.1.1.2 root 1205: #if 0
1.1 root 1206: #ifdef TARGET_CONFIG_CPU_32
1207: env->cpsr = cpsr;
1208: #endif
1.1.1.2 root 1209: #endif
1.1 root 1210:
1211: return 0;
1212: }
1213:
1.1.1.7 ! root 1214: static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
! 1215: target_sigset_t *set, CPUState *env)
! 1216: {
! 1217: struct target_sigaltstack stack;
! 1218: int i;
! 1219:
! 1220: /* Clear all the bits of the ucontext we don't use. */
! 1221: memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
! 1222:
! 1223: memset(&stack, 0, sizeof(stack));
! 1224: __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
! 1225: __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
! 1226: __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
! 1227: memcpy(&uc->tuc_stack, &stack, sizeof(stack));
! 1228:
! 1229: setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
! 1230: /* FIXME: Save coprocessor signal frame. */
! 1231: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
! 1232: __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
! 1233: }
! 1234: }
! 1235:
1.1.1.6 root 1236: /* compare linux/arch/arm/kernel/signal.c:setup_frame() */
1.1.1.7 ! root 1237: static void setup_frame_v1(int usig, struct target_sigaction *ka,
! 1238: target_sigset_t *set, CPUState *regs)
1.1 root 1239: {
1.1.1.7 ! root 1240: struct sigframe_v1 *frame;
1.1.1.6 root 1241: abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1.1.1.7 ! root 1242: int i;
1.1 root 1243:
1.1.1.6 root 1244: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1245: return;
1246:
1.1.1.7 ! root 1247: setup_sigcontext(&frame->sc, regs, set->sig[0]);
1.1 root 1248:
1249: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1250: if (__put_user(set->sig[i], &frame->extramask[i - 1]))
1.1.1.6 root 1251: goto end;
1.1 root 1252: }
1253:
1.1.1.7 ! root 1254: setup_return(regs, ka, &frame->retcode, frame_addr, usig,
! 1255: frame_addr + offsetof(struct sigframe_v1, retcode));
1.1.1.6 root 1256:
1257: end:
1258: unlock_user_struct(frame, frame_addr, 1);
1.1.1.7 ! root 1259: }
! 1260:
! 1261: static void setup_frame_v2(int usig, struct target_sigaction *ka,
! 1262: target_sigset_t *set, CPUState *regs)
! 1263: {
! 1264: struct sigframe_v2 *frame;
! 1265: abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
! 1266:
! 1267: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
! 1268: return;
! 1269:
! 1270: setup_sigframe_v2(&frame->uc, set, regs);
! 1271:
! 1272: setup_return(regs, ka, &frame->retcode, frame_addr, usig,
! 1273: frame_addr + offsetof(struct sigframe_v2, retcode));
! 1274:
! 1275: unlock_user_struct(frame, frame_addr, 1);
! 1276: }
! 1277:
! 1278: static void setup_frame(int usig, struct target_sigaction *ka,
! 1279: target_sigset_t *set, CPUState *regs)
! 1280: {
! 1281: if (get_osversion() >= 0x020612) {
! 1282: setup_frame_v2(usig, ka, set, regs);
! 1283: } else {
! 1284: setup_frame_v1(usig, ka, set, regs);
! 1285: }
1.1 root 1286: }
1287:
1.1.1.6 root 1288: /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
1.1.1.7 ! root 1289: static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
! 1290: target_siginfo_t *info,
! 1291: target_sigset_t *set, CPUState *env)
1.1 root 1292: {
1.1.1.7 ! root 1293: struct rt_sigframe_v1 *frame;
1.1.1.6 root 1294: abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1295: struct target_sigaltstack stack;
1.1.1.7 ! root 1296: int i;
1.1.1.6 root 1297: abi_ulong info_addr, uc_addr;
1.1 root 1298:
1.1.1.6 root 1299: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1.1 root 1300: return /* 1 */;
1301:
1.1.1.7 ! root 1302: info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
! 1303: __put_user(info_addr, &frame->pinfo);
! 1304: uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
! 1305: __put_user(uc_addr, &frame->puc);
! 1306: copy_siginfo_to_user(&frame->info, info);
1.1 root 1307:
1308: /* Clear all the bits of the ucontext we don't use. */
1.1.1.7 ! root 1309: memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
1.1 root 1310:
1.1.1.6 root 1311: memset(&stack, 0, sizeof(stack));
1312: __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1313: __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1314: __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1315: memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
1316:
1.1.1.7 ! root 1317: setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
1.1 root 1318: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1319: if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
1.1.1.6 root 1320: goto end;
1.1 root 1321: }
1322:
1.1.1.7 ! root 1323: setup_return(env, ka, &frame->retcode, frame_addr, usig,
! 1324: frame_addr + offsetof(struct rt_sigframe_v1, retcode));
! 1325:
! 1326: env->regs[1] = info_addr;
! 1327: env->regs[2] = uc_addr;
1.1 root 1328:
1.1.1.6 root 1329: end:
1330: unlock_user_struct(frame, frame_addr, 1);
1.1.1.7 ! root 1331: }
! 1332:
! 1333: static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
! 1334: target_siginfo_t *info,
! 1335: target_sigset_t *set, CPUState *env)
! 1336: {
! 1337: struct rt_sigframe_v2 *frame;
! 1338: abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
! 1339: abi_ulong info_addr, uc_addr;
! 1340:
! 1341: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
! 1342: return /* 1 */;
! 1343:
! 1344: info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
! 1345: uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
! 1346: copy_siginfo_to_user(&frame->info, info);
! 1347:
! 1348: setup_sigframe_v2(&frame->uc, set, env);
! 1349:
! 1350: setup_return(env, ka, &frame->retcode, frame_addr, usig,
! 1351: frame_addr + offsetof(struct rt_sigframe_v2, retcode));
! 1352:
! 1353: env->regs[1] = info_addr;
! 1354: env->regs[2] = uc_addr;
! 1355:
! 1356: unlock_user_struct(frame, frame_addr, 1);
! 1357: }
1.1.1.6 root 1358:
1.1.1.7 ! root 1359: static void setup_rt_frame(int usig, struct target_sigaction *ka,
! 1360: target_siginfo_t *info,
! 1361: target_sigset_t *set, CPUState *env)
! 1362: {
! 1363: if (get_osversion() >= 0x020612) {
! 1364: setup_rt_frame_v2(usig, ka, info, set, env);
! 1365: } else {
! 1366: setup_rt_frame_v1(usig, ka, info, set, env);
! 1367: }
1.1 root 1368: }
1369:
1370: static int
1371: restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
1372: {
1373: int err = 0;
1.1.1.2 root 1374: uint32_t cpsr;
1.1 root 1375:
1376: __get_user_error(env->regs[0], &sc->arm_r0, err);
1377: __get_user_error(env->regs[1], &sc->arm_r1, err);
1378: __get_user_error(env->regs[2], &sc->arm_r2, err);
1379: __get_user_error(env->regs[3], &sc->arm_r3, err);
1380: __get_user_error(env->regs[4], &sc->arm_r4, err);
1381: __get_user_error(env->regs[5], &sc->arm_r5, err);
1382: __get_user_error(env->regs[6], &sc->arm_r6, err);
1383: __get_user_error(env->regs[7], &sc->arm_r7, err);
1384: __get_user_error(env->regs[8], &sc->arm_r8, err);
1385: __get_user_error(env->regs[9], &sc->arm_r9, err);
1386: __get_user_error(env->regs[10], &sc->arm_r10, err);
1387: __get_user_error(env->regs[11], &sc->arm_fp, err);
1388: __get_user_error(env->regs[12], &sc->arm_ip, err);
1389: __get_user_error(env->regs[13], &sc->arm_sp, err);
1390: __get_user_error(env->regs[14], &sc->arm_lr, err);
1391: __get_user_error(env->regs[15], &sc->arm_pc, err);
1392: #ifdef TARGET_CONFIG_CPU_32
1.1.1.2 root 1393: __get_user_error(cpsr, &sc->arm_cpsr, err);
1.1.1.7 ! root 1394: cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC);
1.1 root 1395: #endif
1396:
1397: err |= !valid_user_regs(env);
1398:
1399: return err;
1400: }
1401:
1.1.1.7 ! root 1402: static long do_sigreturn_v1(CPUState *env)
1.1 root 1403: {
1.1.1.6 root 1404: abi_ulong frame_addr;
1.1.1.7 ! root 1405: struct sigframe_v1 *frame;
1.1 root 1406: target_sigset_t set;
1407: sigset_t host_set;
1408: int i;
1409:
1410: /*
1411: * Since we stacked the signal on a 64-bit boundary,
1412: * then 'sp' should be word aligned here. If it's
1413: * not, then the user is trying to mess with us.
1414: */
1415: if (env->regs[13] & 7)
1416: goto badframe;
1417:
1.1.1.6 root 1418: frame_addr = env->regs[13];
1419: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1420: goto badframe;
1.1 root 1421:
1422: if (__get_user(set.sig[0], &frame->sc.oldmask))
1423: goto badframe;
1424: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1425: if (__get_user(set.sig[i], &frame->extramask[i - 1]))
1426: goto badframe;
1427: }
1428:
1429: target_to_host_sigset_internal(&host_set, &set);
1430: sigprocmask(SIG_SETMASK, &host_set, NULL);
1431:
1432: if (restore_sigcontext(env, &frame->sc))
1433: goto badframe;
1434:
1435: #if 0
1436: /* Send SIGTRAP if we're single-stepping */
1437: if (ptrace_cancel_bpt(current))
1438: send_sig(SIGTRAP, current, 1);
1439: #endif
1.1.1.6 root 1440: unlock_user_struct(frame, frame_addr, 0);
1441: return env->regs[0];
1.1 root 1442:
1443: badframe:
1.1.1.6 root 1444: unlock_user_struct(frame, frame_addr, 0);
1.1 root 1445: force_sig(SIGSEGV /* , current */);
1446: return 0;
1447: }
1448:
1.1.1.7 ! root 1449: static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr,
! 1450: struct target_ucontext_v2 *uc)
! 1451: {
! 1452: sigset_t host_set;
! 1453:
! 1454: target_to_host_sigset(&host_set, &uc->tuc_sigmask);
! 1455: sigprocmask(SIG_SETMASK, &host_set, NULL);
! 1456:
! 1457: if (restore_sigcontext(env, &uc->tuc_mcontext))
! 1458: return 1;
! 1459:
! 1460: if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
! 1461: return 1;
! 1462:
! 1463: #if 0
! 1464: /* Send SIGTRAP if we're single-stepping */
! 1465: if (ptrace_cancel_bpt(current))
! 1466: send_sig(SIGTRAP, current, 1);
! 1467: #endif
! 1468:
! 1469: return 0;
! 1470: }
! 1471:
! 1472: static long do_sigreturn_v2(CPUState *env)
1.1 root 1473: {
1.1.1.6 root 1474: abi_ulong frame_addr;
1.1.1.7 ! root 1475: struct sigframe_v2 *frame;
! 1476:
! 1477: /*
! 1478: * Since we stacked the signal on a 64-bit boundary,
! 1479: * then 'sp' should be word aligned here. If it's
! 1480: * not, then the user is trying to mess with us.
! 1481: */
! 1482: if (env->regs[13] & 7)
! 1483: goto badframe;
! 1484:
! 1485: frame_addr = env->regs[13];
! 1486: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
! 1487: goto badframe;
! 1488:
! 1489: if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
! 1490: goto badframe;
! 1491:
! 1492: unlock_user_struct(frame, frame_addr, 0);
! 1493: return env->regs[0];
! 1494:
! 1495: badframe:
! 1496: unlock_user_struct(frame, frame_addr, 0);
! 1497: force_sig(SIGSEGV /* , current */);
! 1498: return 0;
! 1499: }
! 1500:
! 1501: long do_sigreturn(CPUState *env)
! 1502: {
! 1503: if (get_osversion() >= 0x020612) {
! 1504: return do_sigreturn_v2(env);
! 1505: } else {
! 1506: return do_sigreturn_v1(env);
! 1507: }
! 1508: }
! 1509:
! 1510: static long do_rt_sigreturn_v1(CPUState *env)
! 1511: {
! 1512: abi_ulong frame_addr;
! 1513: struct rt_sigframe_v1 *frame;
1.1 root 1514: sigset_t host_set;
1515:
1516: /*
1517: * Since we stacked the signal on a 64-bit boundary,
1518: * then 'sp' should be word aligned here. If it's
1519: * not, then the user is trying to mess with us.
1520: */
1521: if (env->regs[13] & 7)
1522: goto badframe;
1523:
1.1.1.6 root 1524: frame_addr = env->regs[13];
1525: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1526: goto badframe;
1.1 root 1527:
1528: target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
1529: sigprocmask(SIG_SETMASK, &host_set, NULL);
1530:
1531: if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
1532: goto badframe;
1533:
1.1.1.7 ! root 1534: 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 1535: goto badframe;
1536:
1.1 root 1537: #if 0
1538: /* Send SIGTRAP if we're single-stepping */
1539: if (ptrace_cancel_bpt(current))
1540: send_sig(SIGTRAP, current, 1);
1541: #endif
1.1.1.6 root 1542: unlock_user_struct(frame, frame_addr, 0);
1.1 root 1543: return env->regs[0];
1544:
1545: badframe:
1.1.1.6 root 1546: unlock_user_struct(frame, frame_addr, 0);
1.1 root 1547: force_sig(SIGSEGV /* , current */);
1548: return 0;
1549: }
1550:
1.1.1.7 ! root 1551: static long do_rt_sigreturn_v2(CPUState *env)
! 1552: {
! 1553: abi_ulong frame_addr;
! 1554: struct rt_sigframe_v2 *frame;
! 1555:
! 1556: /*
! 1557: * Since we stacked the signal on a 64-bit boundary,
! 1558: * then 'sp' should be word aligned here. If it's
! 1559: * not, then the user is trying to mess with us.
! 1560: */
! 1561: if (env->regs[13] & 7)
! 1562: goto badframe;
! 1563:
! 1564: frame_addr = env->regs[13];
! 1565: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
! 1566: goto badframe;
! 1567:
! 1568: if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
! 1569: goto badframe;
! 1570:
! 1571: unlock_user_struct(frame, frame_addr, 0);
! 1572: return env->regs[0];
! 1573:
! 1574: badframe:
! 1575: unlock_user_struct(frame, frame_addr, 0);
! 1576: force_sig(SIGSEGV /* , current */);
! 1577: return 0;
! 1578: }
! 1579:
! 1580: long do_rt_sigreturn(CPUState *env)
! 1581: {
! 1582: if (get_osversion() >= 0x020612) {
! 1583: return do_rt_sigreturn_v2(env);
! 1584: } else {
! 1585: return do_rt_sigreturn_v1(env);
! 1586: }
! 1587: }
! 1588:
1.1 root 1589: #elif defined(TARGET_SPARC)
1590:
1591: #define __SUNOS_MAXWIN 31
1592:
1593: /* This is what SunOS does, so shall I. */
1594: struct target_sigcontext {
1.1.1.6 root 1595: abi_ulong sigc_onstack; /* state to restore */
1.1 root 1596:
1.1.1.6 root 1597: abi_ulong sigc_mask; /* sigmask to restore */
1598: abi_ulong sigc_sp; /* stack pointer */
1599: abi_ulong sigc_pc; /* program counter */
1600: abi_ulong sigc_npc; /* next program counter */
1601: abi_ulong sigc_psr; /* for condition codes etc */
1602: abi_ulong sigc_g1; /* User uses these two registers */
1603: abi_ulong sigc_o0; /* within the trampoline code. */
1.1 root 1604:
1605: /* Now comes information regarding the users window set
1606: * at the time of the signal.
1607: */
1.1.1.6 root 1608: abi_ulong sigc_oswins; /* outstanding windows */
1.1 root 1609:
1610: /* stack ptrs for each regwin buf */
1611: char *sigc_spbuf[__SUNOS_MAXWIN];
1612:
1613: /* Windows to restore after signal */
1614: struct {
1.1.1.6 root 1615: abi_ulong locals[8];
1616: abi_ulong ins[8];
1.1 root 1617: } sigc_wbuf[__SUNOS_MAXWIN];
1618: };
1619: /* A Sparc stack frame */
1620: struct sparc_stackf {
1.1.1.6 root 1621: abi_ulong locals[8];
1622: abi_ulong ins[6];
1.1 root 1623: struct sparc_stackf *fp;
1.1.1.6 root 1624: abi_ulong callers_pc;
1.1 root 1625: char *structptr;
1.1.1.6 root 1626: abi_ulong xargs[6];
1627: abi_ulong xxargs[1];
1.1 root 1628: };
1629:
1630: typedef struct {
1631: struct {
1.1.1.6 root 1632: abi_ulong psr;
1633: abi_ulong pc;
1634: abi_ulong npc;
1635: abi_ulong y;
1636: abi_ulong u_regs[16]; /* globals and ins */
1.1 root 1637: } si_regs;
1638: int si_mask;
1639: } __siginfo_t;
1640:
1641: typedef struct {
1642: unsigned long si_float_regs [32];
1643: unsigned long si_fsr;
1644: unsigned long si_fpqdepth;
1645: struct {
1646: unsigned long *insn_addr;
1647: unsigned long insn;
1648: } si_fpqueue [16];
1.1.1.4 root 1649: } qemu_siginfo_fpu_t;
1.1 root 1650:
1651:
1652: struct target_signal_frame {
1653: struct sparc_stackf ss;
1654: __siginfo_t info;
1.1.1.6 root 1655: abi_ulong fpu_save;
1656: abi_ulong insns[2] __attribute__ ((aligned (8)));
1657: abi_ulong extramask[TARGET_NSIG_WORDS - 1];
1658: abi_ulong extra_size; /* Should be 0 */
1.1.1.4 root 1659: qemu_siginfo_fpu_t fpu_state;
1.1 root 1660: };
1661: struct target_rt_signal_frame {
1662: struct sparc_stackf ss;
1663: siginfo_t info;
1.1.1.6 root 1664: abi_ulong regs[20];
1.1 root 1665: sigset_t mask;
1.1.1.6 root 1666: abi_ulong fpu_save;
1.1 root 1667: unsigned int insns[2];
1668: stack_t stack;
1669: unsigned int extra_size; /* Should be 0 */
1.1.1.4 root 1670: qemu_siginfo_fpu_t fpu_state;
1.1 root 1671: };
1672:
1673: #define UREG_O0 16
1674: #define UREG_O6 22
1675: #define UREG_I0 0
1676: #define UREG_I1 1
1677: #define UREG_I2 2
1.1.1.6 root 1678: #define UREG_I3 3
1679: #define UREG_I4 4
1680: #define UREG_I5 5
1.1 root 1681: #define UREG_I6 6
1682: #define UREG_I7 7
1683: #define UREG_L0 8
1684: #define UREG_FP UREG_I6
1685: #define UREG_SP UREG_O6
1686:
1.1.1.7 ! root 1687: static inline abi_ulong get_sigframe(struct target_sigaction *sa,
1.1.1.6 root 1688: CPUState *env, unsigned long framesize)
1.1 root 1689: {
1.1.1.6 root 1690: abi_ulong sp;
1.1 root 1691:
1692: sp = env->regwptr[UREG_FP];
1693:
1694: /* This is the X/Open sanctioned signal stack switching. */
1.1.1.7 ! root 1695: if (sa->sa_flags & TARGET_SA_ONSTACK) {
1.1.1.6 root 1696: if (!on_sig_stack(sp)
1697: && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
1698: sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1.1 root 1699: }
1.1.1.6 root 1700: return sp - framesize;
1.1 root 1701: }
1702:
1703: static int
1.1.1.6 root 1704: setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask)
1.1 root 1705: {
1706: int err = 0, i;
1707:
1708: err |= __put_user(env->psr, &si->si_regs.psr);
1709: err |= __put_user(env->pc, &si->si_regs.pc);
1710: err |= __put_user(env->npc, &si->si_regs.npc);
1711: err |= __put_user(env->y, &si->si_regs.y);
1712: for (i=0; i < 8; i++) {
1713: err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
1714: }
1715: for (i=0; i < 8; i++) {
1716: err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
1717: }
1718: err |= __put_user(mask, &si->si_mask);
1719: return err;
1720: }
1721:
1722: #if 0
1723: static int
1724: setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1725: CPUState *env, unsigned long mask)
1726: {
1727: int err = 0;
1728:
1729: err |= __put_user(mask, &sc->sigc_mask);
1730: err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
1731: err |= __put_user(env->pc, &sc->sigc_pc);
1732: err |= __put_user(env->npc, &sc->sigc_npc);
1733: err |= __put_user(env->psr, &sc->sigc_psr);
1734: err |= __put_user(env->gregs[1], &sc->sigc_g1);
1735: err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
1736:
1737: return err;
1738: }
1739: #endif
1740: #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
1741:
1.1.1.7 ! root 1742: static void setup_frame(int sig, struct target_sigaction *ka,
1.1 root 1743: target_sigset_t *set, CPUState *env)
1744: {
1.1.1.6 root 1745: abi_ulong sf_addr;
1.1 root 1746: struct target_signal_frame *sf;
1747: int sigframe_size, err, i;
1748:
1749: /* 1. Make sure everything is clean */
1750: //synchronize_user_stack();
1751:
1752: sigframe_size = NF_ALIGNEDSZ;
1.1.1.6 root 1753: sf_addr = get_sigframe(ka, env, sigframe_size);
1.1 root 1754:
1.1.1.6 root 1755: sf = lock_user(VERIFY_WRITE, sf_addr,
1756: sizeof(struct target_signal_frame), 0);
1757: if (!sf)
1758: goto sigsegv;
1759:
1.1 root 1760: //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1761: #if 0
1762: if (invalid_frame_pointer(sf, sigframe_size))
1763: goto sigill_and_return;
1764: #endif
1765: /* 2. Save the current process state */
1766: err = setup___siginfo(&sf->info, env, set->sig[0]);
1767: err |= __put_user(0, &sf->extra_size);
1768:
1769: //err |= save_fpu_state(regs, &sf->fpu_state);
1770: //err |= __put_user(&sf->fpu_state, &sf->fpu_save);
1771:
1772: err |= __put_user(set->sig[0], &sf->info.si_mask);
1773: for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
1774: err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
1775: }
1776:
1777: for (i = 0; i < 8; i++) {
1778: err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
1779: }
1780: for (i = 0; i < 8; i++) {
1781: err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
1782: }
1783: if (err)
1784: goto sigsegv;
1785:
1786: /* 3. signal handler back-trampoline and parameters */
1.1.1.6 root 1787: env->regwptr[UREG_FP] = sf_addr;
1.1 root 1788: env->regwptr[UREG_I0] = sig;
1.1.1.6 root 1789: env->regwptr[UREG_I1] = sf_addr +
1790: offsetof(struct target_signal_frame, info);
1791: env->regwptr[UREG_I2] = sf_addr +
1792: offsetof(struct target_signal_frame, info);
1.1 root 1793:
1794: /* 4. signal handler */
1.1.1.7 ! root 1795: env->pc = ka->_sa_handler;
1.1 root 1796: env->npc = (env->pc + 4);
1797: /* 5. return to kernel instructions */
1.1.1.7 ! root 1798: if (ka->sa_restorer)
! 1799: env->regwptr[UREG_I7] = ka->sa_restorer;
1.1 root 1800: else {
1.1.1.6 root 1801: uint32_t val32;
1802:
1803: env->regwptr[UREG_I7] = sf_addr +
1804: offsetof(struct target_signal_frame, insns) - 2 * 4;
1.1 root 1805:
1806: /* mov __NR_sigreturn, %g1 */
1.1.1.6 root 1807: val32 = 0x821020d8;
1808: err |= __put_user(val32, &sf->insns[0]);
1.1 root 1809:
1810: /* t 0x10 */
1.1.1.6 root 1811: val32 = 0x91d02010;
1812: err |= __put_user(val32, &sf->insns[1]);
1.1 root 1813: if (err)
1814: goto sigsegv;
1815:
1816: /* Flush instruction space. */
1817: //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
1818: // tb_flush(env);
1819: }
1.1.1.6 root 1820: unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
1.1 root 1821: return;
1.1.1.6 root 1822: #if 0
1823: sigill_and_return:
1.1 root 1824: force_sig(TARGET_SIGILL);
1.1.1.6 root 1825: #endif
1.1 root 1826: sigsegv:
1827: //fprintf(stderr, "force_sig\n");
1.1.1.6 root 1828: unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
1.1 root 1829: force_sig(TARGET_SIGSEGV);
1830: }
1831: static inline int
1.1.1.4 root 1832: restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu)
1.1 root 1833: {
1834: int err;
1835: #if 0
1836: #ifdef CONFIG_SMP
1837: if (current->flags & PF_USEDFPU)
1838: regs->psr &= ~PSR_EF;
1839: #else
1840: if (current == last_task_used_math) {
1841: last_task_used_math = 0;
1842: regs->psr &= ~PSR_EF;
1843: }
1844: #endif
1845: current->used_math = 1;
1846: current->flags &= ~PF_USEDFPU;
1847: #endif
1848: #if 0
1849: if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
1850: return -EFAULT;
1851: #endif
1852:
1.1.1.5 root 1853: #if 0
1854: /* XXX: incorrect */
1.1 root 1855: err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
1856: (sizeof(unsigned long) * 32));
1.1.1.5 root 1857: #endif
1.1 root 1858: err |= __get_user(env->fsr, &fpu->si_fsr);
1859: #if 0
1860: err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
1861: if (current->thread.fpqdepth != 0)
1862: err |= __copy_from_user(¤t->thread.fpqueue[0],
1863: &fpu->si_fpqueue[0],
1864: ((sizeof(unsigned long) +
1865: (sizeof(unsigned long *)))*16));
1866: #endif
1867: return err;
1868: }
1869:
1870:
1.1.1.7 ! root 1871: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1 root 1872: target_siginfo_t *info,
1873: target_sigset_t *set, CPUState *env)
1874: {
1875: fprintf(stderr, "setup_rt_frame: not implemented\n");
1876: }
1877:
1878: long do_sigreturn(CPUState *env)
1879: {
1.1.1.6 root 1880: abi_ulong sf_addr;
1.1 root 1881: struct target_signal_frame *sf;
1882: uint32_t up_psr, pc, npc;
1883: target_sigset_t set;
1884: sigset_t host_set;
1.1.1.6 root 1885: abi_ulong fpu_save_addr;
1.1 root 1886: int err, i;
1887:
1.1.1.6 root 1888: sf_addr = env->regwptr[UREG_FP];
1889: if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1))
1890: goto segv_and_exit;
1.1 root 1891: #if 0
1892: fprintf(stderr, "sigreturn\n");
1893: fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1894: #endif
1895: //cpu_dump_state(env, stderr, fprintf, 0);
1896:
1897: /* 1. Make sure we are not getting garbage from the user */
1898:
1.1.1.6 root 1899: if (sf_addr & 3)
1.1 root 1900: goto segv_and_exit;
1901:
1902: err = __get_user(pc, &sf->info.si_regs.pc);
1903: err |= __get_user(npc, &sf->info.si_regs.npc);
1904:
1905: if ((pc | npc) & 3)
1906: goto segv_and_exit;
1907:
1908: /* 2. Restore the state */
1909: err |= __get_user(up_psr, &sf->info.si_regs.psr);
1910:
1911: /* User can only change condition codes and FPU enabling in %psr. */
1912: env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
1913: | (env->psr & ~(PSR_ICC /* | PSR_EF */));
1914:
1915: env->pc = pc;
1916: env->npc = npc;
1917: err |= __get_user(env->y, &sf->info.si_regs.y);
1918: for (i=0; i < 8; i++) {
1919: err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
1920: }
1921: for (i=0; i < 8; i++) {
1922: err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
1923: }
1924:
1.1.1.6 root 1925: err |= __get_user(fpu_save_addr, &sf->fpu_save);
1.1 root 1926:
1927: //if (fpu_save)
1928: // err |= restore_fpu_state(env, fpu_save);
1929:
1930: /* This is pretty much atomic, no amount locking would prevent
1931: * the races which exist anyways.
1932: */
1933: err |= __get_user(set.sig[0], &sf->info.si_mask);
1934: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1935: err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
1936: }
1937:
1938: target_to_host_sigset_internal(&host_set, &set);
1939: sigprocmask(SIG_SETMASK, &host_set, NULL);
1940:
1941: if (err)
1942: goto segv_and_exit;
1.1.1.6 root 1943: unlock_user_struct(sf, sf_addr, 0);
1.1 root 1944: return env->regwptr[0];
1945:
1946: segv_and_exit:
1.1.1.6 root 1947: unlock_user_struct(sf, sf_addr, 0);
1.1 root 1948: force_sig(TARGET_SIGSEGV);
1949: }
1950:
1951: long do_rt_sigreturn(CPUState *env)
1952: {
1953: fprintf(stderr, "do_rt_sigreturn: not implemented\n");
1.1.1.6 root 1954: return -TARGET_ENOSYS;
1955: }
1956:
1957: #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
1958: #define MC_TSTATE 0
1959: #define MC_PC 1
1960: #define MC_NPC 2
1961: #define MC_Y 3
1962: #define MC_G1 4
1963: #define MC_G2 5
1964: #define MC_G3 6
1965: #define MC_G4 7
1966: #define MC_G5 8
1967: #define MC_G6 9
1968: #define MC_G7 10
1969: #define MC_O0 11
1970: #define MC_O1 12
1971: #define MC_O2 13
1972: #define MC_O3 14
1973: #define MC_O4 15
1974: #define MC_O5 16
1975: #define MC_O6 17
1976: #define MC_O7 18
1977: #define MC_NGREG 19
1978:
1979: typedef abi_ulong target_mc_greg_t;
1980: typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
1981:
1982: struct target_mc_fq {
1983: abi_ulong *mcfq_addr;
1984: uint32_t mcfq_insn;
1985: };
1986:
1987: struct target_mc_fpu {
1988: union {
1989: uint32_t sregs[32];
1990: uint64_t dregs[32];
1991: //uint128_t qregs[16];
1992: } mcfpu_fregs;
1993: abi_ulong mcfpu_fsr;
1994: abi_ulong mcfpu_fprs;
1995: abi_ulong mcfpu_gsr;
1996: struct target_mc_fq *mcfpu_fq;
1997: unsigned char mcfpu_qcnt;
1998: unsigned char mcfpu_qentsz;
1999: unsigned char mcfpu_enab;
2000: };
2001: typedef struct target_mc_fpu target_mc_fpu_t;
2002:
2003: typedef struct {
2004: target_mc_gregset_t mc_gregs;
2005: target_mc_greg_t mc_fp;
2006: target_mc_greg_t mc_i7;
2007: target_mc_fpu_t mc_fpregs;
2008: } target_mcontext_t;
2009:
2010: struct target_ucontext {
2011: struct target_ucontext *uc_link;
2012: abi_ulong uc_flags;
2013: target_sigset_t uc_sigmask;
2014: target_mcontext_t uc_mcontext;
2015: };
2016:
2017: /* A V9 register window */
2018: struct target_reg_window {
2019: abi_ulong locals[8];
2020: abi_ulong ins[8];
2021: };
2022:
2023: #define TARGET_STACK_BIAS 2047
2024:
2025: /* {set, get}context() needed for 64-bit SparcLinux userland. */
2026: void sparc64_set_context(CPUSPARCState *env)
2027: {
2028: abi_ulong ucp_addr;
2029: struct target_ucontext *ucp;
2030: target_mc_gregset_t *grp;
2031: abi_ulong pc, npc, tstate;
2032: abi_ulong fp, i7, w_addr;
2033: unsigned char fenab;
2034: int err;
2035: unsigned int i;
2036:
2037: ucp_addr = env->regwptr[UREG_I0];
2038: if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1))
2039: goto do_sigsegv;
2040: grp = &ucp->uc_mcontext.mc_gregs;
2041: err = __get_user(pc, &((*grp)[MC_PC]));
2042: err |= __get_user(npc, &((*grp)[MC_NPC]));
2043: if (err || ((pc | npc) & 3))
2044: goto do_sigsegv;
2045: if (env->regwptr[UREG_I1]) {
2046: target_sigset_t target_set;
2047: sigset_t set;
2048:
2049: if (TARGET_NSIG_WORDS == 1) {
2050: if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0]))
2051: goto do_sigsegv;
2052: } else {
2053: abi_ulong *src, *dst;
2054: src = ucp->uc_sigmask.sig;
2055: dst = target_set.sig;
2056: for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2057: i++, dst++, src++)
2058: err |= __get_user(*dst, src);
2059: if (err)
2060: goto do_sigsegv;
2061: }
2062: target_to_host_sigset_internal(&set, &target_set);
2063: sigprocmask(SIG_SETMASK, &set, NULL);
2064: }
2065: env->pc = pc;
2066: env->npc = npc;
2067: err |= __get_user(env->y, &((*grp)[MC_Y]));
2068: err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
2069: env->asi = (tstate >> 24) & 0xff;
2070: PUT_CCR(env, tstate >> 32);
2071: PUT_CWP64(env, tstate & 0x1f);
2072: err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
2073: err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
2074: err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
2075: err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
2076: err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
2077: err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
2078: err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
2079: err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
2080: err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
2081: err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
2082: err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
2083: err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
2084: err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
2085: err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
2086: err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
2087:
2088: err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp));
2089: err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7));
2090:
2091: w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2092: if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2093: abi_ulong) != 0)
2094: goto do_sigsegv;
2095: if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2096: abi_ulong) != 0)
2097: goto do_sigsegv;
2098: err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
2099: err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
2100: {
2101: uint32_t *src, *dst;
2102: src = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2103: dst = env->fpr;
2104: /* XXX: check that the CPU storage is the same as user context */
2105: for (i = 0; i < 64; i++, dst++, src++)
2106: err |= __get_user(*dst, src);
2107: }
2108: err |= __get_user(env->fsr,
2109: &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
2110: err |= __get_user(env->gsr,
2111: &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
2112: if (err)
2113: goto do_sigsegv;
2114: unlock_user_struct(ucp, ucp_addr, 0);
2115: return;
2116: do_sigsegv:
2117: unlock_user_struct(ucp, ucp_addr, 0);
2118: force_sig(SIGSEGV);
1.1 root 2119: }
2120:
1.1.1.6 root 2121: void sparc64_get_context(CPUSPARCState *env)
2122: {
2123: abi_ulong ucp_addr;
2124: struct target_ucontext *ucp;
2125: target_mc_gregset_t *grp;
2126: target_mcontext_t *mcp;
2127: abi_ulong fp, i7, w_addr;
2128: int err;
2129: unsigned int i;
2130: target_sigset_t target_set;
2131: sigset_t set;
2132:
2133: ucp_addr = env->regwptr[UREG_I0];
2134: if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0))
2135: goto do_sigsegv;
2136:
2137: mcp = &ucp->uc_mcontext;
2138: grp = &mcp->mc_gregs;
2139:
2140: /* Skip over the trap instruction, first. */
2141: env->pc = env->npc;
2142: env->npc += 4;
2143:
2144: err = 0;
2145:
2146: sigprocmask(0, NULL, &set);
2147: host_to_target_sigset_internal(&target_set, &set);
2148: if (TARGET_NSIG_WORDS == 1) {
2149: err |= __put_user(target_set.sig[0],
2150: (abi_ulong *)&ucp->uc_sigmask);
2151: } else {
2152: abi_ulong *src, *dst;
2153: src = target_set.sig;
2154: dst = ucp->uc_sigmask.sig;
2155: for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2156: i++, dst++, src++)
2157: err |= __put_user(*src, dst);
2158: if (err)
2159: goto do_sigsegv;
2160: }
2161:
2162: /* XXX: tstate must be saved properly */
2163: // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
2164: err |= __put_user(env->pc, &((*grp)[MC_PC]));
2165: err |= __put_user(env->npc, &((*grp)[MC_NPC]));
2166: err |= __put_user(env->y, &((*grp)[MC_Y]));
2167: err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
2168: err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
2169: err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
2170: err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
2171: err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
2172: err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
2173: err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
2174: err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
2175: err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
2176: err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
2177: err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
2178: err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
2179: err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
2180: err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
2181: err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
2182:
2183: w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2184: fp = i7 = 0;
2185: if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2186: abi_ulong) != 0)
2187: goto do_sigsegv;
2188: if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2189: abi_ulong) != 0)
2190: goto do_sigsegv;
2191: err |= __put_user(fp, &(mcp->mc_fp));
2192: err |= __put_user(i7, &(mcp->mc_i7));
2193:
2194: {
2195: uint32_t *src, *dst;
2196: src = env->fpr;
2197: dst = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2198: /* XXX: check that the CPU storage is the same as user context */
2199: for (i = 0; i < 64; i++, dst++, src++)
2200: err |= __put_user(*src, dst);
2201: }
2202: err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
2203: err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
2204: err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
2205:
2206: if (err)
2207: goto do_sigsegv;
2208: unlock_user_struct(ucp, ucp_addr, 1);
2209: return;
2210: do_sigsegv:
2211: unlock_user_struct(ucp, ucp_addr, 1);
2212: force_sig(SIGSEGV);
2213: }
2214: #endif
2215: #elif defined(TARGET_ABI_MIPSN64)
2216:
2217: # warning signal handling not implemented
2218:
1.1.1.7 ! root 2219: static void setup_frame(int sig, struct target_sigaction *ka,
1.1.1.6 root 2220: target_sigset_t *set, CPUState *env)
2221: {
2222: fprintf(stderr, "setup_frame: not implemented\n");
2223: }
2224:
1.1.1.7 ! root 2225: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1.1.6 root 2226: target_siginfo_t *info,
2227: target_sigset_t *set, CPUState *env)
2228: {
2229: fprintf(stderr, "setup_rt_frame: not implemented\n");
2230: }
2231:
2232: long do_sigreturn(CPUState *env)
2233: {
2234: fprintf(stderr, "do_sigreturn: not implemented\n");
2235: return -TARGET_ENOSYS;
2236: }
2237:
2238: long do_rt_sigreturn(CPUState *env)
2239: {
2240: fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2241: return -TARGET_ENOSYS;
2242: }
2243:
2244: #elif defined(TARGET_ABI_MIPSN32)
2245:
2246: # warning signal handling not implemented
2247:
1.1.1.7 ! root 2248: static void setup_frame(int sig, struct target_sigaction *ka,
1.1.1.6 root 2249: target_sigset_t *set, CPUState *env)
2250: {
2251: fprintf(stderr, "setup_frame: not implemented\n");
2252: }
2253:
1.1.1.7 ! root 2254: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1.1.6 root 2255: target_siginfo_t *info,
2256: target_sigset_t *set, CPUState *env)
2257: {
2258: fprintf(stderr, "setup_rt_frame: not implemented\n");
2259: }
2260:
2261: long do_sigreturn(CPUState *env)
2262: {
2263: fprintf(stderr, "do_sigreturn: not implemented\n");
2264: return -TARGET_ENOSYS;
2265: }
2266:
2267: long do_rt_sigreturn(CPUState *env)
2268: {
2269: fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2270: return -TARGET_ENOSYS;
2271: }
2272:
2273: #elif defined(TARGET_ABI_MIPSO32)
1.1.1.4 root 2274:
2275: struct target_sigcontext {
2276: uint32_t sc_regmask; /* Unused */
2277: uint32_t sc_status;
2278: uint64_t sc_pc;
2279: uint64_t sc_regs[32];
2280: uint64_t sc_fpregs[32];
2281: uint32_t sc_ownedfp; /* Unused */
2282: uint32_t sc_fpc_csr;
2283: uint32_t sc_fpc_eir; /* Unused */
2284: uint32_t sc_used_math;
2285: uint32_t sc_dsp; /* dsp status, was sc_ssflags */
2286: uint64_t sc_mdhi;
2287: uint64_t sc_mdlo;
2288: target_ulong sc_hi1; /* Was sc_cause */
2289: target_ulong sc_lo1; /* Was sc_badvaddr */
2290: target_ulong sc_hi2; /* Was sc_sigset[4] */
2291: target_ulong sc_lo2;
2292: target_ulong sc_hi3;
2293: target_ulong sc_lo3;
2294: };
2295:
2296: struct sigframe {
2297: uint32_t sf_ass[4]; /* argument save space for o32 */
2298: uint32_t sf_code[2]; /* signal trampoline */
2299: struct target_sigcontext sf_sc;
2300: target_sigset_t sf_mask;
2301: };
2302:
2303: /* Install trampoline to jump back from signal handler */
2304: static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
2305: {
2306: int err;
2307:
2308: /*
2309: * Set up the return code ...
2310: *
2311: * li v0, __NR__foo_sigreturn
2312: * syscall
2313: */
2314:
2315: err = __put_user(0x24020000 + syscall, tramp + 0);
2316: err |= __put_user(0x0000000c , tramp + 1);
2317: /* flush_cache_sigtramp((unsigned long) tramp); */
2318: return err;
2319: }
2320:
2321: static inline int
2322: setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2323: {
2324: int err = 0;
2325:
1.1.1.7 ! root 2326: err |= __put_user(regs->active_tc.PC, &sc->sc_pc);
1.1.1.4 root 2327:
1.1.1.7 ! root 2328: #define save_gp_reg(i) do { \
! 2329: err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
1.1.1.4 root 2330: } while(0)
2331: __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2);
2332: save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6);
2333: save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10);
2334: save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
2335: save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18);
2336: save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22);
2337: save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
2338: save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30);
2339: save_gp_reg(31);
1.1.1.6 root 2340: #undef save_gp_reg
1.1.1.4 root 2341:
1.1.1.7 ! root 2342: err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
! 2343: err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
1.1.1.4 root 2344:
2345: /* Not used yet, but might be useful if we ever have DSP suppport */
2346: #if 0
2347: if (cpu_has_dsp) {
2348: err |= __put_user(mfhi1(), &sc->sc_hi1);
2349: err |= __put_user(mflo1(), &sc->sc_lo1);
2350: err |= __put_user(mfhi2(), &sc->sc_hi2);
2351: err |= __put_user(mflo2(), &sc->sc_lo2);
2352: err |= __put_user(mfhi3(), &sc->sc_hi3);
2353: err |= __put_user(mflo3(), &sc->sc_lo3);
2354: err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2355: }
2356: /* same with 64 bit */
1.1.1.6 root 2357: #ifdef CONFIG_64BIT
1.1.1.4 root 2358: err |= __put_user(regs->hi, &sc->sc_hi[0]);
2359: err |= __put_user(regs->lo, &sc->sc_lo[0]);
2360: if (cpu_has_dsp) {
2361: err |= __put_user(mfhi1(), &sc->sc_hi[1]);
2362: err |= __put_user(mflo1(), &sc->sc_lo[1]);
2363: err |= __put_user(mfhi2(), &sc->sc_hi[2]);
2364: err |= __put_user(mflo2(), &sc->sc_lo[2]);
2365: err |= __put_user(mfhi3(), &sc->sc_hi[3]);
2366: err |= __put_user(mflo3(), &sc->sc_lo[3]);
2367: err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2368: }
1.1.1.6 root 2369: #endif
2370: #endif
1.1.1.4 root 2371:
1.1.1.6 root 2372: #if 0
1.1.1.4 root 2373: err |= __put_user(!!used_math(), &sc->sc_used_math);
2374:
2375: if (!used_math())
2376: goto out;
2377:
2378: /*
2379: * Save FPU state to signal context. Signal handler will "inherit"
2380: * current FPU state.
2381: */
2382: preempt_disable();
2383:
2384: if (!is_fpu_owner()) {
2385: own_fpu();
2386: restore_fp(current);
2387: }
2388: err |= save_fp_context(sc);
2389:
2390: preempt_enable();
2391: out:
2392: #endif
2393: return err;
2394: }
2395:
2396: static inline int
2397: restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2398: {
2399: int err = 0;
2400:
2401: err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
2402:
1.1.1.7 ! root 2403: err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
! 2404: err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
1.1.1.4 root 2405:
1.1.1.6 root 2406: #define restore_gp_reg(i) do { \
1.1.1.7 ! root 2407: err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
1.1.1.4 root 2408: } while(0)
2409: restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3);
2410: restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6);
2411: restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9);
2412: restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12);
2413: restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15);
2414: restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18);
2415: restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21);
2416: restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24);
2417: restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27);
2418: restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30);
2419: restore_gp_reg(31);
1.1.1.6 root 2420: #undef restore_gp_reg
1.1.1.4 root 2421:
2422: #if 0
2423: if (cpu_has_dsp) {
2424: err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
2425: err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
2426: err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
2427: err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
2428: err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
2429: err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
2430: err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2431: }
1.1.1.6 root 2432: #ifdef CONFIG_64BIT
1.1.1.4 root 2433: err |= __get_user(regs->hi, &sc->sc_hi[0]);
2434: err |= __get_user(regs->lo, &sc->sc_lo[0]);
2435: if (cpu_has_dsp) {
2436: err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
2437: err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
2438: err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
2439: err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
2440: err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
2441: err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
2442: err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2443: }
1.1.1.6 root 2444: #endif
1.1.1.4 root 2445:
2446: err |= __get_user(used_math, &sc->sc_used_math);
2447: conditional_used_math(used_math);
2448:
2449: preempt_disable();
2450:
2451: if (used_math()) {
2452: /* restore fpu context if we have used it before */
2453: own_fpu();
2454: err |= restore_fp_context(sc);
2455: } else {
2456: /* signal handler may have used FPU. Give it up. */
2457: lose_fpu();
2458: }
2459:
2460: preempt_enable();
2461: #endif
2462: return err;
2463: }
2464: /*
2465: * Determine which stack to use..
2466: */
1.1.1.6 root 2467: static inline abi_ulong
1.1.1.7 ! root 2468: get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
1.1.1.4 root 2469: {
2470: unsigned long sp;
2471:
2472: /* Default to using normal stack */
1.1.1.7 ! root 2473: sp = regs->active_tc.gpr[29];
1.1.1.4 root 2474:
2475: /*
2476: * FPU emulator may have it's own trampoline active just
2477: * above the user stack, 16-bytes before the next lowest
2478: * 16 byte boundary. Try to avoid trashing it.
2479: */
2480: sp -= 32;
2481:
2482: /* This is the X/Open sanctioned signal stack switching. */
1.1.1.7 ! root 2483: if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
1.1.1.6 root 2484: sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2485: }
1.1.1.4 root 2486:
1.1.1.6 root 2487: return (sp - frame_size) & ~7;
1.1.1.4 root 2488: }
2489:
1.1.1.6 root 2490: /* compare linux/arch/mips/kernel/signal.c:setup_frame() */
1.1.1.7 ! root 2491: static void setup_frame(int sig, struct target_sigaction * ka,
1.1.1.6 root 2492: target_sigset_t *set, CPUState *regs)
1.1.1.4 root 2493: {
2494: struct sigframe *frame;
1.1.1.6 root 2495: abi_ulong frame_addr;
1.1.1.4 root 2496: int i;
2497:
1.1.1.6 root 2498: frame_addr = get_sigframe(ka, regs, sizeof(*frame));
2499: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1.1.1.4 root 2500: goto give_sigsegv;
2501:
2502: install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
2503:
2504: if(setup_sigcontext(regs, &frame->sf_sc))
2505: goto give_sigsegv;
2506:
2507: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2508: if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
2509: goto give_sigsegv;
2510: }
2511:
2512: /*
2513: * Arguments to signal handler:
2514: *
2515: * a0 = signal number
2516: * a1 = 0 (should be cause)
2517: * a2 = pointer to struct sigcontext
2518: *
2519: * $25 and PC point to the signal handler, $29 points to the
2520: * struct sigframe.
2521: */
1.1.1.7 ! root 2522: regs->active_tc.gpr[ 4] = sig;
! 2523: regs->active_tc.gpr[ 5] = 0;
! 2524: regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
! 2525: regs->active_tc.gpr[29] = frame_addr;
! 2526: regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
1.1.1.4 root 2527: /* The original kernel code sets CP0_EPC to the handler
2528: * since it returns to userland using eret
2529: * we cannot do this here, and we must set PC directly */
1.1.1.7 ! root 2530: regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
1.1.1.6 root 2531: unlock_user_struct(frame, frame_addr, 1);
1.1.1.4 root 2532: return;
2533:
2534: give_sigsegv:
1.1.1.6 root 2535: unlock_user_struct(frame, frame_addr, 1);
1.1.1.4 root 2536: force_sig(TARGET_SIGSEGV/*, current*/);
1.1.1.6 root 2537: return;
1.1.1.4 root 2538: }
2539:
2540: long do_sigreturn(CPUState *regs)
2541: {
1.1.1.6 root 2542: struct sigframe *frame;
2543: abi_ulong frame_addr;
2544: sigset_t blocked;
2545: target_sigset_t target_set;
2546: int i;
1.1.1.4 root 2547:
2548: #if defined(DEBUG_SIGNAL)
1.1.1.6 root 2549: fprintf(stderr, "do_sigreturn\n");
1.1.1.4 root 2550: #endif
1.1.1.7 ! root 2551: frame_addr = regs->active_tc.gpr[29];
1.1.1.6 root 2552: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1.1.1.4 root 2553: goto badframe;
2554:
1.1.1.6 root 2555: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1.1.1.4 root 2556: if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
2557: goto badframe;
1.1.1.6 root 2558: }
1.1.1.4 root 2559:
1.1.1.6 root 2560: target_to_host_sigset_internal(&blocked, &target_set);
2561: sigprocmask(SIG_SETMASK, &blocked, NULL);
1.1.1.4 root 2562:
1.1.1.6 root 2563: if (restore_sigcontext(regs, &frame->sf_sc))
1.1.1.4 root 2564: goto badframe;
2565:
2566: #if 0
1.1.1.6 root 2567: /*
2568: * Don't let your children do this ...
2569: */
2570: __asm__ __volatile__(
1.1.1.4 root 2571: "move\t$29, %0\n\t"
2572: "j\tsyscall_exit"
2573: :/* no outputs */
2574: :"r" (®s));
1.1.1.6 root 2575: /* Unreached */
1.1.1.4 root 2576: #endif
1.1.1.6 root 2577:
1.1.1.7 ! root 2578: regs->active_tc.PC = regs->CP0_EPC;
1.1.1.6 root 2579: /* I am not sure this is right, but it seems to work
1.1.1.4 root 2580: * maybe a problem with nested signals ? */
2581: regs->CP0_EPC = 0;
2582: return 0;
2583:
2584: badframe:
1.1.1.6 root 2585: force_sig(TARGET_SIGSEGV/*, current*/);
2586: return 0;
1.1.1.4 root 2587: }
2588:
1.1.1.7 ! root 2589: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1.1.4 root 2590: target_siginfo_t *info,
2591: target_sigset_t *set, CPUState *env)
2592: {
2593: fprintf(stderr, "setup_rt_frame: not implemented\n");
2594: }
2595:
2596: long do_rt_sigreturn(CPUState *env)
2597: {
2598: fprintf(stderr, "do_rt_sigreturn: not implemented\n");
1.1.1.6 root 2599: return -TARGET_ENOSYS;
2600: }
2601:
2602: #elif defined(TARGET_SH4)
2603:
2604: /*
2605: * code and data structures from linux kernel:
2606: * include/asm-sh/sigcontext.h
2607: * arch/sh/kernel/signal.c
2608: */
2609:
2610: struct target_sigcontext {
2611: target_ulong oldmask;
2612:
2613: /* CPU registers */
2614: target_ulong sc_gregs[16];
2615: target_ulong sc_pc;
2616: target_ulong sc_pr;
2617: target_ulong sc_sr;
2618: target_ulong sc_gbr;
2619: target_ulong sc_mach;
2620: target_ulong sc_macl;
2621:
2622: /* FPU registers */
2623: target_ulong sc_fpregs[16];
2624: target_ulong sc_xfpregs[16];
2625: unsigned int sc_fpscr;
2626: unsigned int sc_fpul;
2627: unsigned int sc_ownedfp;
2628: };
2629:
2630: struct target_sigframe
2631: {
2632: struct target_sigcontext sc;
2633: target_ulong extramask[TARGET_NSIG_WORDS-1];
2634: uint16_t retcode[3];
2635: };
2636:
2637:
2638: struct target_ucontext {
2639: target_ulong uc_flags;
2640: struct target_ucontext *uc_link;
2641: target_stack_t uc_stack;
2642: struct target_sigcontext uc_mcontext;
2643: target_sigset_t uc_sigmask; /* mask last for extensibility */
2644: };
2645:
2646: struct target_rt_sigframe
2647: {
2648: struct target_siginfo info;
2649: struct target_ucontext uc;
2650: uint16_t retcode[3];
2651: };
2652:
2653:
2654: #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
2655: #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
2656:
1.1.1.7 ! root 2657: static abi_ulong get_sigframe(struct target_sigaction *ka,
1.1.1.6 root 2658: unsigned long sp, size_t frame_size)
2659: {
1.1.1.7 ! root 2660: if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
1.1.1.6 root 2661: sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2662: }
2663:
2664: return (sp - frame_size) & -8ul;
2665: }
2666:
2667: static int setup_sigcontext(struct target_sigcontext *sc,
2668: CPUState *regs, unsigned long mask)
2669: {
2670: int err = 0;
2671:
2672: #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
2673: COPY(gregs[0]); COPY(gregs[1]);
2674: COPY(gregs[2]); COPY(gregs[3]);
2675: COPY(gregs[4]); COPY(gregs[5]);
2676: COPY(gregs[6]); COPY(gregs[7]);
2677: COPY(gregs[8]); COPY(gregs[9]);
2678: COPY(gregs[10]); COPY(gregs[11]);
2679: COPY(gregs[12]); COPY(gregs[13]);
2680: COPY(gregs[14]); COPY(gregs[15]);
2681: COPY(gbr); COPY(mach);
2682: COPY(macl); COPY(pr);
2683: COPY(sr); COPY(pc);
2684: #undef COPY
2685:
2686: /* todo: save FPU registers here */
2687:
2688: /* non-iBCS2 extensions.. */
2689: err |= __put_user(mask, &sc->oldmask);
2690:
2691: return err;
2692: }
2693:
2694: static int restore_sigcontext(struct CPUState *regs,
2695: struct target_sigcontext *sc)
2696: {
2697: unsigned int err = 0;
2698:
2699: #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
2700: COPY(gregs[1]);
2701: COPY(gregs[2]); COPY(gregs[3]);
2702: COPY(gregs[4]); COPY(gregs[5]);
2703: COPY(gregs[6]); COPY(gregs[7]);
2704: COPY(gregs[8]); COPY(gregs[9]);
2705: COPY(gregs[10]); COPY(gregs[11]);
2706: COPY(gregs[12]); COPY(gregs[13]);
2707: COPY(gregs[14]); COPY(gregs[15]);
2708: COPY(gbr); COPY(mach);
2709: COPY(macl); COPY(pr);
2710: COPY(sr); COPY(pc);
2711: #undef COPY
2712:
2713: /* todo: restore FPU registers here */
2714:
2715: regs->tra = -1; /* disable syscall checks */
2716: return err;
2717: }
2718:
1.1.1.7 ! root 2719: static void setup_frame(int sig, struct target_sigaction *ka,
1.1.1.6 root 2720: target_sigset_t *set, CPUState *regs)
2721: {
2722: struct target_sigframe *frame;
2723: abi_ulong frame_addr;
2724: int i;
2725: int err = 0;
2726: int signal;
2727:
2728: frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
2729: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2730: goto give_sigsegv;
2731:
2732: signal = current_exec_domain_sig(sig);
2733:
2734: err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
2735:
2736: for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
2737: err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
2738: }
2739:
2740: /* Set up to return from userspace. If provided, use a stub
2741: already in userspace. */
1.1.1.7 ! root 2742: if (ka->sa_flags & TARGET_SA_RESTORER) {
! 2743: regs->pr = (unsigned long) ka->sa_restorer;
1.1.1.6 root 2744: } else {
2745: /* Generate return code (system call to sigreturn) */
2746: err |= __put_user(MOVW(2), &frame->retcode[0]);
2747: err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
2748: err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
2749: regs->pr = (unsigned long) frame->retcode;
2750: }
2751:
2752: if (err)
2753: goto give_sigsegv;
2754:
2755: /* Set up registers for signal handler */
2756: regs->gregs[15] = (unsigned long) frame;
2757: regs->gregs[4] = signal; /* Arg for signal handler */
2758: regs->gregs[5] = 0;
2759: regs->gregs[6] = (unsigned long) &frame->sc;
1.1.1.7 ! root 2760: regs->pc = (unsigned long) ka->_sa_handler;
1.1.1.6 root 2761:
2762: unlock_user_struct(frame, frame_addr, 1);
2763: return;
2764:
2765: give_sigsegv:
2766: unlock_user_struct(frame, frame_addr, 1);
2767: force_sig(SIGSEGV);
2768: }
2769:
1.1.1.7 ! root 2770: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1.1.6 root 2771: target_siginfo_t *info,
2772: target_sigset_t *set, CPUState *regs)
2773: {
2774: struct target_rt_sigframe *frame;
2775: abi_ulong frame_addr;
2776: int i;
2777: int err = 0;
2778: int signal;
2779:
2780: frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
2781: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2782: goto give_sigsegv;
2783:
2784: signal = current_exec_domain_sig(sig);
2785:
2786: err |= copy_siginfo_to_user(&frame->info, info);
2787:
2788: /* Create the ucontext. */
2789: err |= __put_user(0, &frame->uc.uc_flags);
2790: err |= __put_user(0, (unsigned long *)&frame->uc.uc_link);
1.1.1.7 ! root 2791: err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp,
1.1.1.6 root 2792: &frame->uc.uc_stack.ss_sp);
2793: err |= __put_user(sas_ss_flags(regs->gregs[15]),
2794: &frame->uc.uc_stack.ss_flags);
2795: err |= __put_user(target_sigaltstack_used.ss_size,
2796: &frame->uc.uc_stack.ss_size);
2797: err |= setup_sigcontext(&frame->uc.uc_mcontext,
2798: regs, set->sig[0]);
2799: for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2800: err |= __put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]);
2801: }
2802:
2803: /* Set up to return from userspace. If provided, use a stub
2804: already in userspace. */
1.1.1.7 ! root 2805: if (ka->sa_flags & TARGET_SA_RESTORER) {
! 2806: regs->pr = (unsigned long) ka->sa_restorer;
1.1.1.6 root 2807: } else {
2808: /* Generate return code (system call to sigreturn) */
2809: err |= __put_user(MOVW(2), &frame->retcode[0]);
2810: err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
2811: err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
2812: regs->pr = (unsigned long) frame->retcode;
2813: }
2814:
2815: if (err)
2816: goto give_sigsegv;
2817:
2818: /* Set up registers for signal handler */
2819: regs->gregs[15] = (unsigned long) frame;
2820: regs->gregs[4] = signal; /* Arg for signal handler */
2821: regs->gregs[5] = (unsigned long) &frame->info;
2822: regs->gregs[6] = (unsigned long) &frame->uc;
1.1.1.7 ! root 2823: regs->pc = (unsigned long) ka->_sa_handler;
1.1.1.6 root 2824:
2825: unlock_user_struct(frame, frame_addr, 1);
2826: return;
2827:
2828: give_sigsegv:
2829: unlock_user_struct(frame, frame_addr, 1);
2830: force_sig(SIGSEGV);
2831: }
2832:
2833: long do_sigreturn(CPUState *regs)
2834: {
2835: struct target_sigframe *frame;
2836: abi_ulong frame_addr;
2837: sigset_t blocked;
2838: target_sigset_t target_set;
2839: int i;
2840: int err = 0;
2841:
2842: #if defined(DEBUG_SIGNAL)
2843: fprintf(stderr, "do_sigreturn\n");
2844: #endif
2845: frame_addr = regs->gregs[15];
2846: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2847: goto badframe;
2848:
2849: err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
2850: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2851: err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
2852: }
2853:
2854: if (err)
2855: goto badframe;
2856:
2857: target_to_host_sigset_internal(&blocked, &target_set);
2858: sigprocmask(SIG_SETMASK, &blocked, NULL);
2859:
2860: if (restore_sigcontext(regs, &frame->sc))
2861: goto badframe;
2862:
2863: unlock_user_struct(frame, frame_addr, 0);
2864: return regs->gregs[0];
2865:
2866: badframe:
2867: unlock_user_struct(frame, frame_addr, 0);
2868: force_sig(TARGET_SIGSEGV);
2869: return 0;
2870: }
2871:
2872: long do_rt_sigreturn(CPUState *regs)
2873: {
2874: struct target_rt_sigframe *frame;
2875: abi_ulong frame_addr;
2876: sigset_t blocked;
2877:
2878: #if defined(DEBUG_SIGNAL)
2879: fprintf(stderr, "do_rt_sigreturn\n");
2880: #endif
2881: frame_addr = regs->gregs[15];
2882: if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2883: goto badframe;
2884:
2885: target_to_host_sigset(&blocked, &frame->uc.uc_sigmask);
2886: sigprocmask(SIG_SETMASK, &blocked, NULL);
2887:
2888: if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
2889: goto badframe;
2890:
2891: if (do_sigaltstack(frame_addr +
2892: offsetof(struct target_rt_sigframe, uc.uc_stack),
2893: 0, get_sp_from_cpustate(regs)) == -EFAULT)
2894: goto badframe;
2895:
2896: unlock_user_struct(frame, frame_addr, 0);
2897: return regs->gregs[0];
2898:
2899: badframe:
2900: unlock_user_struct(frame, frame_addr, 0);
2901: force_sig(TARGET_SIGSEGV);
2902: return 0;
1.1.1.4 root 2903: }
1.1.1.7 ! root 2904: #elif defined(TARGET_CRIS)
! 2905:
! 2906: struct target_sigcontext {
! 2907: struct target_pt_regs regs; /* needs to be first */
! 2908: uint32_t oldmask;
! 2909: uint32_t usp; /* usp before stacking this gunk on it */
! 2910: };
! 2911:
! 2912: /* Signal frames. */
! 2913: struct target_signal_frame {
! 2914: struct target_sigcontext sc;
! 2915: uint32_t extramask[TARGET_NSIG_WORDS - 1];
! 2916: uint8_t retcode[8]; /* Trampoline code. */
! 2917: };
! 2918:
! 2919: struct rt_signal_frame {
! 2920: struct siginfo *pinfo;
! 2921: void *puc;
! 2922: struct siginfo info;
! 2923: struct ucontext uc;
! 2924: uint8_t retcode[8]; /* Trampoline code. */
! 2925: };
! 2926:
! 2927: static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env)
! 2928: {
! 2929: __put_user(env->regs[0], &sc->regs.r0);
! 2930: __put_user(env->regs[1], &sc->regs.r1);
! 2931: __put_user(env->regs[2], &sc->regs.r2);
! 2932: __put_user(env->regs[3], &sc->regs.r3);
! 2933: __put_user(env->regs[4], &sc->regs.r4);
! 2934: __put_user(env->regs[5], &sc->regs.r5);
! 2935: __put_user(env->regs[6], &sc->regs.r6);
! 2936: __put_user(env->regs[7], &sc->regs.r7);
! 2937: __put_user(env->regs[8], &sc->regs.r8);
! 2938: __put_user(env->regs[9], &sc->regs.r9);
! 2939: __put_user(env->regs[10], &sc->regs.r10);
! 2940: __put_user(env->regs[11], &sc->regs.r11);
! 2941: __put_user(env->regs[12], &sc->regs.r12);
! 2942: __put_user(env->regs[13], &sc->regs.r13);
! 2943: __put_user(env->regs[14], &sc->usp);
! 2944: __put_user(env->regs[15], &sc->regs.acr);
! 2945: __put_user(env->pregs[PR_MOF], &sc->regs.mof);
! 2946: __put_user(env->pregs[PR_SRP], &sc->regs.srp);
! 2947: __put_user(env->pc, &sc->regs.erp);
! 2948: }
! 2949:
! 2950: static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env)
! 2951: {
! 2952: __get_user(env->regs[0], &sc->regs.r0);
! 2953: __get_user(env->regs[1], &sc->regs.r1);
! 2954: __get_user(env->regs[2], &sc->regs.r2);
! 2955: __get_user(env->regs[3], &sc->regs.r3);
! 2956: __get_user(env->regs[4], &sc->regs.r4);
! 2957: __get_user(env->regs[5], &sc->regs.r5);
! 2958: __get_user(env->regs[6], &sc->regs.r6);
! 2959: __get_user(env->regs[7], &sc->regs.r7);
! 2960: __get_user(env->regs[8], &sc->regs.r8);
! 2961: __get_user(env->regs[9], &sc->regs.r9);
! 2962: __get_user(env->regs[10], &sc->regs.r10);
! 2963: __get_user(env->regs[11], &sc->regs.r11);
! 2964: __get_user(env->regs[12], &sc->regs.r12);
! 2965: __get_user(env->regs[13], &sc->regs.r13);
! 2966: __get_user(env->regs[14], &sc->usp);
! 2967: __get_user(env->regs[15], &sc->regs.acr);
! 2968: __get_user(env->pregs[PR_MOF], &sc->regs.mof);
! 2969: __get_user(env->pregs[PR_SRP], &sc->regs.srp);
! 2970: __get_user(env->pc, &sc->regs.erp);
! 2971: }
! 2972:
! 2973: static abi_ulong get_sigframe(CPUState *env, int framesize)
! 2974: {
! 2975: abi_ulong sp;
! 2976: /* Align the stack downwards to 4. */
! 2977: sp = (env->regs[R_SP] & ~3);
! 2978: return sp - framesize;
! 2979: }
! 2980:
! 2981: static void setup_frame(int sig, struct target_sigaction *ka,
! 2982: target_sigset_t *set, CPUState *env)
! 2983: {
! 2984: struct target_signal_frame *frame;
! 2985: abi_ulong frame_addr;
! 2986: int err = 0;
! 2987: int i;
! 2988:
! 2989: frame_addr = get_sigframe(env, sizeof *frame);
! 2990: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
! 2991: goto badframe;
! 2992:
! 2993: /*
! 2994: * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
! 2995: * use this trampoline anymore but it sets it up for GDB.
! 2996: * In QEMU, using the trampoline simplifies things a bit so we use it.
! 2997: *
! 2998: * This is movu.w __NR_sigreturn, r9; break 13;
! 2999: */
! 3000: err |= __put_user(0x9c5f, frame->retcode+0);
! 3001: err |= __put_user(TARGET_NR_sigreturn,
! 3002: frame->retcode+2);
! 3003: err |= __put_user(0xe93d, frame->retcode+4);
! 3004:
! 3005: /* Save the mask. */
! 3006: err |= __put_user(set->sig[0], &frame->sc.oldmask);
! 3007: if (err)
! 3008: goto badframe;
! 3009:
! 3010: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
! 3011: if (__put_user(set->sig[i], &frame->extramask[i - 1]))
! 3012: goto badframe;
! 3013: }
! 3014:
! 3015: setup_sigcontext(&frame->sc, env);
! 3016:
! 3017: /* Move the stack and setup the arguments for the handler. */
! 3018: env->regs[R_SP] = (uint32_t) (unsigned long) frame;
! 3019: env->regs[10] = sig;
! 3020: env->pc = (unsigned long) ka->_sa_handler;
! 3021: /* Link SRP so the guest returns through the trampoline. */
! 3022: env->pregs[PR_SRP] = (uint32_t) (unsigned long) &frame->retcode[0];
! 3023:
! 3024: unlock_user_struct(frame, frame_addr, 1);
! 3025: return;
! 3026: badframe:
! 3027: unlock_user_struct(frame, frame_addr, 1);
! 3028: force_sig(TARGET_SIGSEGV);
! 3029: }
! 3030:
! 3031: static void setup_rt_frame(int sig, struct target_sigaction *ka,
! 3032: target_siginfo_t *info,
! 3033: target_sigset_t *set, CPUState *env)
! 3034: {
! 3035: fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
! 3036: }
! 3037:
! 3038: long do_sigreturn(CPUState *env)
! 3039: {
! 3040: struct target_signal_frame *frame;
! 3041: abi_ulong frame_addr;
! 3042: target_sigset_t target_set;
! 3043: sigset_t set;
! 3044: int i;
! 3045:
! 3046: frame_addr = env->regs[R_SP];
! 3047: /* Make sure the guest isn't playing games. */
! 3048: if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
! 3049: goto badframe;
! 3050:
! 3051: /* Restore blocked signals */
! 3052: if (__get_user(target_set.sig[0], &frame->sc.oldmask))
! 3053: goto badframe;
! 3054: for(i = 1; i < TARGET_NSIG_WORDS; i++) {
! 3055: if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
! 3056: goto badframe;
! 3057: }
! 3058: target_to_host_sigset_internal(&set, &target_set);
! 3059: sigprocmask(SIG_SETMASK, &set, NULL);
! 3060:
! 3061: restore_sigcontext(&frame->sc, env);
! 3062: unlock_user_struct(frame, frame_addr, 0);
! 3063: return env->regs[10];
! 3064: badframe:
! 3065: unlock_user_struct(frame, frame_addr, 0);
! 3066: force_sig(TARGET_SIGSEGV);
! 3067: }
! 3068:
! 3069: long do_rt_sigreturn(CPUState *env)
! 3070: {
! 3071: fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
! 3072: return -TARGET_ENOSYS;
! 3073: }
1.1 root 3074:
3075: #else
3076:
1.1.1.7 ! root 3077: static void setup_frame(int sig, struct target_sigaction *ka,
1.1 root 3078: target_sigset_t *set, CPUState *env)
3079: {
3080: fprintf(stderr, "setup_frame: not implemented\n");
3081: }
3082:
1.1.1.7 ! root 3083: static void setup_rt_frame(int sig, struct target_sigaction *ka,
1.1 root 3084: target_siginfo_t *info,
3085: target_sigset_t *set, CPUState *env)
3086: {
3087: fprintf(stderr, "setup_rt_frame: not implemented\n");
3088: }
3089:
3090: long do_sigreturn(CPUState *env)
3091: {
3092: fprintf(stderr, "do_sigreturn: not implemented\n");
1.1.1.6 root 3093: return -TARGET_ENOSYS;
1.1 root 3094: }
3095:
3096: long do_rt_sigreturn(CPUState *env)
3097: {
3098: fprintf(stderr, "do_rt_sigreturn: not implemented\n");
1.1.1.6 root 3099: return -TARGET_ENOSYS;
1.1 root 3100: }
3101:
3102: #endif
3103:
1.1.1.7 ! root 3104: void process_pending_signals(CPUState *cpu_env)
1.1 root 3105: {
3106: int sig;
1.1.1.6 root 3107: abi_ulong handler;
1.1 root 3108: sigset_t set, old_set;
3109: target_sigset_t target_old_set;
1.1.1.7 ! root 3110: struct emulated_sigtable *k;
! 3111: struct target_sigaction *sa;
1.1 root 3112: struct sigqueue *q;
1.1.1.7 ! root 3113: TaskState *ts = cpu_env->opaque;
1.1.1.6 root 3114:
1.1.1.7 ! root 3115: if (!ts->signal_pending)
1.1 root 3116: return;
3117:
1.1.1.7 ! root 3118: /* FIXME: This is not threadsafe. */
! 3119: k = ts->sigtab;
1.1 root 3120: for(sig = 1; sig <= TARGET_NSIG; sig++) {
3121: if (k->pending)
3122: goto handle_signal;
3123: k++;
3124: }
3125: /* if no signal is pending, just return */
1.1.1.7 ! root 3126: ts->signal_pending = 0;
1.1 root 3127: return;
3128:
3129: handle_signal:
3130: #ifdef DEBUG_SIGNAL
3131: fprintf(stderr, "qemu: process signal %d\n", sig);
3132: #endif
3133: /* dequeue signal */
3134: q = k->first;
3135: k->first = q->next;
3136: if (!k->first)
3137: k->pending = 0;
1.1.1.6 root 3138:
1.1 root 3139: sig = gdb_handlesig (cpu_env, sig);
3140: if (!sig) {
1.1.1.7 ! root 3141: sa = NULL;
! 3142: handler = TARGET_SIG_IGN;
! 3143: } else {
! 3144: sa = &sigact_table[sig - 1];
! 3145: handler = sa->_sa_handler;
1.1 root 3146: }
3147:
3148: if (handler == TARGET_SIG_DFL) {
1.1.1.7 ! root 3149: /* default handler : ignore some signal. The other are job control or fatal */
! 3150: if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
! 3151: kill(getpid(),SIGSTOP);
! 3152: } else if (sig != TARGET_SIGCHLD &&
! 3153: sig != TARGET_SIGURG &&
! 3154: sig != TARGET_SIGWINCH &&
! 3155: sig != TARGET_SIGCONT) {
1.1 root 3156: force_sig(sig);
3157: }
3158: } else if (handler == TARGET_SIG_IGN) {
3159: /* ignore sig */
3160: } else if (handler == TARGET_SIG_ERR) {
3161: force_sig(sig);
3162: } else {
3163: /* compute the blocked signals during the handler execution */
1.1.1.7 ! root 3164: target_to_host_sigset(&set, &sa->sa_mask);
1.1 root 3165: /* SA_NODEFER indicates that the current signal should not be
3166: blocked during the handler */
1.1.1.7 ! root 3167: if (!(sa->sa_flags & TARGET_SA_NODEFER))
1.1 root 3168: sigaddset(&set, target_to_host_signal(sig));
1.1.1.6 root 3169:
1.1 root 3170: /* block signals in the handler using Linux */
3171: sigprocmask(SIG_BLOCK, &set, &old_set);
3172: /* save the previous blocked signal state to restore it at the
3173: end of the signal execution (see do_sigreturn) */
3174: host_to_target_sigset_internal(&target_old_set, &old_set);
3175:
3176: /* if the CPU is in VM86 mode, we restore the 32 bit values */
1.1.1.6 root 3177: #if defined(TARGET_I386) && !defined(TARGET_X86_64)
1.1 root 3178: {
3179: CPUX86State *env = cpu_env;
3180: if (env->eflags & VM_MASK)
3181: save_v86_state(env);
3182: }
3183: #endif
3184: /* prepare the stack frame of the virtual CPU */
1.1.1.7 ! root 3185: if (sa->sa_flags & TARGET_SA_SIGINFO)
! 3186: setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
1.1 root 3187: else
1.1.1.7 ! root 3188: setup_frame(sig, sa, &target_old_set, cpu_env);
! 3189: if (sa->sa_flags & TARGET_SA_RESETHAND)
! 3190: sa->_sa_handler = TARGET_SIG_DFL;
1.1 root 3191: }
3192: if (q != &k->info)
1.1.1.7 ! root 3193: free_sigqueue(cpu_env, q);
1.1 root 3194: }
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