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1
/*
2
 *  Emulation of Linux signals
3
 *
4
 *  Copyright (c) 2003 Fabrice Bellard
5
 *
6
 *  This program is free software; you can redistribute it and/or modify
7
 *  it under the terms of the GNU General Public License as published by
8
 *  the Free Software Foundation; either version 2 of the License, or
9
 *  (at your option) any later version.
10
 *
11
 *  This program is distributed in the hope that it will be useful,
12
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14
 *  GNU General Public License for more details.
15
 *
16
 *  You should have received a copy of the GNU General Public License
17
 *  along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19
 */
20
#include <stdlib.h>
21
#include <stdio.h>
22
#include <string.h>
23
#include <stdarg.h>
24
#include <unistd.h>
25
#include <signal.h>
26
#include <errno.h>
27
#include <sys/ucontext.h>
28

    
29
#include "qemu.h"
30
#include "target_signal.h"
31

    
32
//#define DEBUG_SIGNAL
33

    
34
#define MAX_SIGQUEUE_SIZE 1024
35

    
36
struct sigqueue {
37
    struct sigqueue *next;
38
    target_siginfo_t info;
39
};
40

    
41
struct emulated_sigaction {
42
    struct target_sigaction sa;
43
    int pending; /* true if signal is pending */
44
    struct sigqueue *first;
45
    struct sigqueue info; /* in order to always have memory for the
46
                             first signal, we put it here */
47
};
48

    
49
struct target_sigaltstack target_sigaltstack_used = {
50
    .ss_sp = 0,
51
    .ss_size = 0,
52
    .ss_flags = TARGET_SS_DISABLE,
53
};
54

    
55
static struct emulated_sigaction sigact_table[TARGET_NSIG];
56
static struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
57
static struct sigqueue *first_free; /* first free siginfo queue entry */
58
static int signal_pending; /* non zero if a signal may be pending */
59

    
60
static void host_signal_handler(int host_signum, siginfo_t *info,
61
                                void *puc);
62

    
63
static uint8_t host_to_target_signal_table[65] = {
64
    [SIGHUP] = TARGET_SIGHUP,
65
    [SIGINT] = TARGET_SIGINT,
66
    [SIGQUIT] = TARGET_SIGQUIT,
67
    [SIGILL] = TARGET_SIGILL,
68
    [SIGTRAP] = TARGET_SIGTRAP,
69
    [SIGABRT] = TARGET_SIGABRT,
70
/*    [SIGIOT] = TARGET_SIGIOT,*/
71
    [SIGBUS] = TARGET_SIGBUS,
72
    [SIGFPE] = TARGET_SIGFPE,
73
    [SIGKILL] = TARGET_SIGKILL,
74
    [SIGUSR1] = TARGET_SIGUSR1,
75
    [SIGSEGV] = TARGET_SIGSEGV,
76
    [SIGUSR2] = TARGET_SIGUSR2,
77
    [SIGPIPE] = TARGET_SIGPIPE,
78
    [SIGALRM] = TARGET_SIGALRM,
79
    [SIGTERM] = TARGET_SIGTERM,
80
#ifdef SIGSTKFLT
81
    [SIGSTKFLT] = TARGET_SIGSTKFLT,
82
#endif
83
    [SIGCHLD] = TARGET_SIGCHLD,
84
    [SIGCONT] = TARGET_SIGCONT,
85
    [SIGSTOP] = TARGET_SIGSTOP,
86
    [SIGTSTP] = TARGET_SIGTSTP,
87
    [SIGTTIN] = TARGET_SIGTTIN,
88
    [SIGTTOU] = TARGET_SIGTTOU,
89
    [SIGURG] = TARGET_SIGURG,
90
    [SIGXCPU] = TARGET_SIGXCPU,
91
    [SIGXFSZ] = TARGET_SIGXFSZ,
92
    [SIGVTALRM] = TARGET_SIGVTALRM,
93
    [SIGPROF] = TARGET_SIGPROF,
94
    [SIGWINCH] = TARGET_SIGWINCH,
95
    [SIGIO] = TARGET_SIGIO,
96
    [SIGPWR] = TARGET_SIGPWR,
97
    [SIGSYS] = TARGET_SIGSYS,
98
    /* next signals stay the same */
99
};
100
static uint8_t target_to_host_signal_table[65];
101

    
102
static inline int on_sig_stack(unsigned long sp)
103
{
104
    return (sp - target_sigaltstack_used.ss_sp
105
            < target_sigaltstack_used.ss_size);
106
}
107

    
108
static inline int sas_ss_flags(unsigned long sp)
109
{
110
    return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE
111
            : on_sig_stack(sp) ? SS_ONSTACK : 0);
112
}
113

    
114
static inline int host_to_target_signal(int sig)
115
{
116
    return host_to_target_signal_table[sig];
117
}
118

    
119
static inline int target_to_host_signal(int sig)
120
{
121
    return target_to_host_signal_table[sig];
122
}
123

    
124
static void host_to_target_sigset_internal(target_sigset_t *d,
125
                                           const sigset_t *s)
126
{
127
    int i;
128
    unsigned long sigmask;
129
    uint32_t target_sigmask;
130

    
131
    sigmask = ((unsigned long *)s)[0];
132
    target_sigmask = 0;
133
    for(i = 0; i < 32; i++) {
134
        if (sigmask & (1 << i))
135
            target_sigmask |= 1 << (host_to_target_signal(i + 1) - 1);
136
    }
137
#if TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 32
138
    d->sig[0] = target_sigmask;
139
    for(i = 1;i < TARGET_NSIG_WORDS; i++) {
140
        d->sig[i] = ((unsigned long *)s)[i];
141
    }
142
#elif TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
143
    d->sig[0] = target_sigmask;
144
    d->sig[1] = sigmask >> 32;
145
#else
146
#warning host_to_target_sigset
147
#endif
148
}
149

    
150
void host_to_target_sigset(target_sigset_t *d, const sigset_t *s)
151
{
152
    target_sigset_t d1;
153
    int i;
154

    
155
    host_to_target_sigset_internal(&d1, s);
156
    for(i = 0;i < TARGET_NSIG_WORDS; i++)
157
        d->sig[i] = tswapl(d1.sig[i]);
158
}
159

    
160
void target_to_host_sigset_internal(sigset_t *d, const target_sigset_t *s)
161
{
162
    int i;
163
    unsigned long sigmask;
164
    abi_ulong target_sigmask;
165

    
166
    target_sigmask = s->sig[0];
167
    sigmask = 0;
168
    for(i = 0; i < 32; i++) {
169
        if (target_sigmask & (1 << i))
170
            sigmask |= 1 << (target_to_host_signal(i + 1) - 1);
171
    }
172
#if TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 32
173
    ((unsigned long *)d)[0] = sigmask;
174
    for(i = 1;i < TARGET_NSIG_WORDS; i++) {
175
        ((unsigned long *)d)[i] = s->sig[i];
176
    }
177
#elif TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
178
    ((unsigned long *)d)[0] = sigmask | ((unsigned long)(s->sig[1]) << 32);
179
#else
180
#warning target_to_host_sigset
181
#endif /* TARGET_ABI_BITS */
182
}
183

    
184
void target_to_host_sigset(sigset_t *d, const target_sigset_t *s)
185
{
186
    target_sigset_t s1;
187
    int i;
188

    
189
    for(i = 0;i < TARGET_NSIG_WORDS; i++)
190
        s1.sig[i] = tswapl(s->sig[i]);
191
    target_to_host_sigset_internal(d, &s1);
192
}
193

    
194
void host_to_target_old_sigset(abi_ulong *old_sigset,
195
                               const sigset_t *sigset)
196
{
197
    target_sigset_t d;
198
    host_to_target_sigset(&d, sigset);
199
    *old_sigset = d.sig[0];
200
}
201

    
202
void target_to_host_old_sigset(sigset_t *sigset,
203
                               const abi_ulong *old_sigset)
204
{
205
    target_sigset_t d;
206
    int i;
207

    
208
    d.sig[0] = *old_sigset;
209
    for(i = 1;i < TARGET_NSIG_WORDS; i++)
210
        d.sig[i] = 0;
211
    target_to_host_sigset(sigset, &d);
212
}
213

    
214
/* siginfo conversion */
215

    
216
static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
217
                                                 const siginfo_t *info)
218
{
219
    int sig;
220
    sig = host_to_target_signal(info->si_signo);
221
    tinfo->si_signo = sig;
222
    tinfo->si_errno = 0;
223
    tinfo->si_code = 0;
224
    if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
225
        sig == SIGBUS || sig == SIGTRAP) {
226
        /* should never come here, but who knows. The information for
227
           the target is irrelevant */
228
        tinfo->_sifields._sigfault._addr = 0;
229
    } else if (sig == SIGIO) {
230
        tinfo->_sifields._sigpoll._fd = info->si_fd;
231
    } else if (sig >= TARGET_SIGRTMIN) {
232
        tinfo->_sifields._rt._pid = info->si_pid;
233
        tinfo->_sifields._rt._uid = info->si_uid;
234
        /* XXX: potential problem if 64 bit */
235
        tinfo->_sifields._rt._sigval.sival_ptr =
236
            (abi_ulong)info->si_value.sival_ptr;
237
    }
238
}
239

    
240
static void tswap_siginfo(target_siginfo_t *tinfo,
241
                          const target_siginfo_t *info)
242
{
243
    int sig;
244
    sig = info->si_signo;
245
    tinfo->si_signo = tswap32(sig);
246
    tinfo->si_errno = tswap32(info->si_errno);
247
    tinfo->si_code = tswap32(info->si_code);
248
    if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
249
        sig == SIGBUS || sig == SIGTRAP) {
250
        tinfo->_sifields._sigfault._addr =
251
            tswapl(info->_sifields._sigfault._addr);
252
    } else if (sig == SIGIO) {
253
        tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
254
    } else if (sig >= TARGET_SIGRTMIN) {
255
        tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid);
256
        tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid);
257
        tinfo->_sifields._rt._sigval.sival_ptr =
258
            tswapl(info->_sifields._rt._sigval.sival_ptr);
259
    }
260
}
261

    
262

    
263
void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info)
264
{
265
    host_to_target_siginfo_noswap(tinfo, info);
266
    tswap_siginfo(tinfo, tinfo);
267
}
268

    
269
/* XXX: we support only POSIX RT signals are used. */
270
/* XXX: find a solution for 64 bit (additional malloced data is needed) */
271
void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo)
272
{
273
    info->si_signo = tswap32(tinfo->si_signo);
274
    info->si_errno = tswap32(tinfo->si_errno);
275
    info->si_code = tswap32(tinfo->si_code);
276
    info->si_pid = tswap32(tinfo->_sifields._rt._pid);
277
    info->si_uid = tswap32(tinfo->_sifields._rt._uid);
278
    info->si_value.sival_ptr =
279
        (void *)tswapl(tinfo->_sifields._rt._sigval.sival_ptr);
280
}
281

    
282
void signal_init(void)
283
{
284
    struct sigaction act;
285
    int i, j;
286

    
287
    /* generate signal conversion tables */
288
    for(i = 1; i <= 64; i++) {
289
        if (host_to_target_signal_table[i] == 0)
290
            host_to_target_signal_table[i] = i;
291
    }
292
    for(i = 1; i <= 64; i++) {
293
        j = host_to_target_signal_table[i];
294
        target_to_host_signal_table[j] = i;
295
    }
296

    
297
    /* set all host signal handlers. ALL signals are blocked during
298
       the handlers to serialize them. */
299
    sigfillset(&act.sa_mask);
300
    act.sa_flags = SA_SIGINFO;
301
    act.sa_sigaction = host_signal_handler;
302
    for(i = 1; i < NSIG; i++) {
303
        sigaction(i, &act, NULL);
304
    }
305

    
306
    memset(sigact_table, 0, sizeof(sigact_table));
307

    
308
    first_free = &sigqueue_table[0];
309
    for(i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++)
310
        sigqueue_table[i].next = &sigqueue_table[i + 1];
311
    sigqueue_table[MAX_SIGQUEUE_SIZE - 1].next = NULL;
312
}
313

    
314
/* signal queue handling */
315

    
316
static inline struct sigqueue *alloc_sigqueue(void)
317
{
318
    struct sigqueue *q = first_free;
319
    if (!q)
320
        return NULL;
321
    first_free = q->next;
322
    return q;
323
}
324

    
325
static inline void free_sigqueue(struct sigqueue *q)
326
{
327
    q->next = first_free;
328
    first_free = q;
329
}
330

    
331
/* abort execution with signal */
332
void __attribute((noreturn)) force_sig(int sig)
333
{
334
    int host_sig;
335
    host_sig = target_to_host_signal(sig);
336
    fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
337
            sig, strsignal(host_sig));
338
#if 1
339
    _exit(-host_sig);
340
#else
341
    {
342
        struct sigaction act;
343
        sigemptyset(&act.sa_mask);
344
        act.sa_flags = SA_SIGINFO;
345
        act.sa_sigaction = SIG_DFL;
346
        sigaction(SIGABRT, &act, NULL);
347
        abort();
348
    }
349
#endif
350
}
351

    
352
/* queue a signal so that it will be send to the virtual CPU as soon
353
   as possible */
354
int queue_signal(int sig, target_siginfo_t *info)
355
{
356
    struct emulated_sigaction *k;
357
    struct sigqueue *q, **pq;
358
    abi_ulong handler;
359

    
360
#if defined(DEBUG_SIGNAL)
361
    fprintf(stderr, "queue_signal: sig=%d\n",
362
            sig);
363
#endif
364
    k = &sigact_table[sig - 1];
365
    handler = k->sa._sa_handler;
366
    if (handler == TARGET_SIG_DFL) {
367
        /* default handler : ignore some signal. The other are fatal */
368
        if (sig != TARGET_SIGCHLD &&
369
            sig != TARGET_SIGURG &&
370
            sig != TARGET_SIGWINCH) {
371
            force_sig(sig);
372
        } else {
373
            return 0; /* indicate ignored */
374
        }
375
    } else if (handler == TARGET_SIG_IGN) {
376
        /* ignore signal */
377
        return 0;
378
    } else if (handler == TARGET_SIG_ERR) {
379
        force_sig(sig);
380
    } else {
381
        pq = &k->first;
382
        if (sig < TARGET_SIGRTMIN) {
383
            /* if non real time signal, we queue exactly one signal */
384
            if (!k->pending)
385
                q = &k->info;
386
            else
387
                return 0;
388
        } else {
389
            if (!k->pending) {
390
                /* first signal */
391
                q = &k->info;
392
            } else {
393
                q = alloc_sigqueue();
394
                if (!q)
395
                    return -EAGAIN;
396
                while (*pq != NULL)
397
                    pq = &(*pq)->next;
398
            }
399
        }
400
        *pq = q;
401
        q->info = *info;
402
        q->next = NULL;
403
        k->pending = 1;
404
        /* signal that a new signal is pending */
405
        signal_pending = 1;
406
        return 1; /* indicates that the signal was queued */
407
    }
408
}
409

    
410
static void host_signal_handler(int host_signum, siginfo_t *info,
411
                                void *puc)
412
{
413
    int sig;
414
    target_siginfo_t tinfo;
415

    
416
    /* the CPU emulator uses some host signals to detect exceptions,
417
       we we forward to it some signals */
418
    if (host_signum == SIGSEGV || host_signum == SIGBUS
419
#if defined(TARGET_I386) && defined(USE_CODE_COPY)
420
        || host_signum == SIGFPE
421
#endif
422
        ) {
423
        if (cpu_signal_handler(host_signum, info, puc))
424
            return;
425
    }
426

    
427
    /* get target signal number */
428
    sig = host_to_target_signal(host_signum);
429
    if (sig < 1 || sig > TARGET_NSIG)
430
        return;
431
#if defined(DEBUG_SIGNAL)
432
    fprintf(stderr, "qemu: got signal %d\n", sig);
433
#endif
434
    host_to_target_siginfo_noswap(&tinfo, info);
435
    if (queue_signal(sig, &tinfo) == 1) {
436
        /* interrupt the virtual CPU as soon as possible */
437
        cpu_interrupt(global_env, CPU_INTERRUPT_EXIT);
438
    }
439
}
440

    
441
/* do_sigaltstack() returns target values and errnos. */
442
int do_sigaltstack(const struct target_sigaltstack *uss,
443
                   struct target_sigaltstack *uoss,
444
                   abi_ulong sp)
445
{
446
    int ret;
447
    struct target_sigaltstack oss;
448

    
449
    /* XXX: test errors */
450
    if(uoss)
451
    {
452
        __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
453
        __put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
454
        __put_user(sas_ss_flags(sp), &oss.ss_flags);
455
    }
456

    
457
    if(uss)
458
    {
459
        struct target_sigaltstack ss;
460

    
461
        ret = -TARGET_EFAULT;
462
        if (!access_ok(VERIFY_READ, uss, sizeof(*uss))
463
            || __get_user(ss.ss_sp, &uss->ss_sp)
464
            || __get_user(ss.ss_size, &uss->ss_size)
465
            || __get_user(ss.ss_flags, &uss->ss_flags))
466
            goto out;
467

    
468
        ret = -TARGET_EPERM;
469
        if (on_sig_stack(sp))
470
            goto out;
471

    
472
        ret = -TARGET_EINVAL;
473
        if (ss.ss_flags != TARGET_SS_DISABLE
474
            && ss.ss_flags != TARGET_SS_ONSTACK
475
            && ss.ss_flags != 0)
476
            goto out;
477

    
478
        if (ss.ss_flags == TARGET_SS_DISABLE) {
479
            ss.ss_size = 0;
480
            ss.ss_sp = 0;
481
        } else {
482
            ret = -TARGET_ENOMEM;
483
            if (ss.ss_size < MINSIGSTKSZ)
484
                goto out;
485
        }
486

    
487
        target_sigaltstack_used.ss_sp = ss.ss_sp;
488
        target_sigaltstack_used.ss_size = ss.ss_size;
489
    }
490

    
491
    if (uoss) {
492
        ret = -TARGET_EFAULT;
493
        if (!access_ok(VERIFY_WRITE, uoss, sizeof(oss)))
494
            goto out;
495
        memcpy(uoss, &oss, sizeof(oss));
496
    }
497

    
498
    ret = 0;
499
out:
500
    return ret;
501
}
502

    
503
/* do_sigaction() return host values and errnos */
504
int do_sigaction(int sig, const struct target_sigaction *act,
505
                 struct target_sigaction *oact)
506
{
507
    struct emulated_sigaction *k;
508
    struct sigaction act1;
509
    int host_sig;
510
    int ret = 0;
511

    
512
    if (sig < 1 || sig > TARGET_NSIG || sig == SIGKILL || sig == SIGSTOP)
513
        return -EINVAL;
514
    k = &sigact_table[sig - 1];
515
#if defined(DEBUG_SIGNAL)
516
    fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
517
            sig, (int)act, (int)oact);
518
#endif
519
    if (oact) {
520
        oact->_sa_handler = tswapl(k->sa._sa_handler);
521
        oact->sa_flags = tswapl(k->sa.sa_flags);
522
#if !defined(TARGET_MIPS)
523
        oact->sa_restorer = tswapl(k->sa.sa_restorer);
524
#endif
525
        oact->sa_mask = k->sa.sa_mask;
526
    }
527
    if (act) {
528
        k->sa._sa_handler = tswapl(act->_sa_handler);
529
        k->sa.sa_flags = tswapl(act->sa_flags);
530
#if !defined(TARGET_MIPS)
531
        k->sa.sa_restorer = tswapl(act->sa_restorer);
532
#endif
533
        k->sa.sa_mask = act->sa_mask;
534

    
535
        /* we update the host linux signal state */
536
        host_sig = target_to_host_signal(sig);
537
        if (host_sig != SIGSEGV && host_sig != SIGBUS) {
538
            sigfillset(&act1.sa_mask);
539
            act1.sa_flags = SA_SIGINFO;
540
            if (k->sa.sa_flags & TARGET_SA_RESTART)
541
                act1.sa_flags |= SA_RESTART;
542
            /* NOTE: it is important to update the host kernel signal
543
               ignore state to avoid getting unexpected interrupted
544
               syscalls */
545
            if (k->sa._sa_handler == TARGET_SIG_IGN) {
546
                act1.sa_sigaction = (void *)SIG_IGN;
547
            } else if (k->sa._sa_handler == TARGET_SIG_DFL) {
548
                act1.sa_sigaction = (void *)SIG_DFL;
549
            } else {
550
                act1.sa_sigaction = host_signal_handler;
551
            }
552
            ret = sigaction(host_sig, &act1, NULL);
553
        }
554
    }
555
    return ret;
556
}
557

    
558
#ifndef offsetof
559
#define offsetof(type, field) ((size_t) &((type *)0)->field)
560
#endif
561

    
562
static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
563
                                       const target_siginfo_t *info)
564
{
565
    tswap_siginfo(tinfo, info);
566
    return 0;
567
}
568

    
569
#ifdef TARGET_I386
570

    
571
/* from the Linux kernel */
572

    
573
struct target_fpreg {
574
        uint16_t significand[4];
575
        uint16_t exponent;
576
};
577

    
578
struct target_fpxreg {
579
        uint16_t significand[4];
580
        uint16_t exponent;
581
        uint16_t padding[3];
582
};
583

    
584
struct target_xmmreg {
585
        abi_ulong element[4];
586
};
587

    
588
struct target_fpstate {
589
        /* Regular FPU environment */
590
        abi_ulong       cw;
591
        abi_ulong       sw;
592
        abi_ulong       tag;
593
        abi_ulong       ipoff;
594
        abi_ulong       cssel;
595
        abi_ulong       dataoff;
596
        abi_ulong       datasel;
597
        struct target_fpreg        _st[8];
598
        uint16_t        status;
599
        uint16_t        magic;                /* 0xffff = regular FPU data only */
600

    
601
        /* FXSR FPU environment */
602
        abi_ulong       _fxsr_env[6];   /* FXSR FPU env is ignored */
603
        abi_ulong       mxcsr;
604
        abi_ulong       reserved;
605
        struct target_fpxreg        _fxsr_st[8];        /* FXSR FPU reg data is ignored */
606
        struct target_xmmreg        _xmm[8];
607
        abi_ulong       padding[56];
608
};
609

    
610
#define X86_FXSR_MAGIC                0x0000
611

    
612
struct target_sigcontext {
613
        uint16_t gs, __gsh;
614
        uint16_t fs, __fsh;
615
        uint16_t es, __esh;
616
        uint16_t ds, __dsh;
617
        abi_ulong edi;
618
        abi_ulong esi;
619
        abi_ulong ebp;
620
        abi_ulong esp;
621
        abi_ulong ebx;
622
        abi_ulong edx;
623
        abi_ulong ecx;
624
        abi_ulong eax;
625
        abi_ulong trapno;
626
        abi_ulong err;
627
        abi_ulong eip;
628
        uint16_t cs, __csh;
629
        abi_ulong eflags;
630
        abi_ulong esp_at_signal;
631
        uint16_t ss, __ssh;
632
        abi_ulong fpstate; /* pointer */
633
        abi_ulong oldmask;
634
        abi_ulong cr2;
635
};
636

    
637
struct target_ucontext {
638
        abi_ulong         tuc_flags;
639
        abi_ulong         tuc_link;
640
        target_stack_t          tuc_stack;
641
        struct target_sigcontext tuc_mcontext;
642
        target_sigset_t          tuc_sigmask;        /* mask last for extensibility */
643
};
644

    
645
struct sigframe
646
{
647
    abi_ulong pretcode;
648
    int sig;
649
    struct target_sigcontext sc;
650
    struct target_fpstate fpstate;
651
    abi_ulong extramask[TARGET_NSIG_WORDS-1];
652
    char retcode[8];
653
};
654

    
655
struct rt_sigframe
656
{
657
    abi_ulong pretcode;
658
    int sig;
659
    abi_ulong pinfo;
660
    abi_ulong puc;
661
    struct target_siginfo info;
662
    struct target_ucontext uc;
663
    struct target_fpstate fpstate;
664
    char retcode[8];
665
};
666

    
667
/*
668
 * Set up a signal frame.
669
 */
670

    
671
/* XXX: save x87 state */
672
static int
673
setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
674
                 CPUX86State *env, unsigned long mask)
675
{
676
        int err = 0;
677

    
678
        err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
679
        err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
680
        err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
681
        err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
682
        err |= __put_user(env->regs[R_EDI], &sc->edi);
683
        err |= __put_user(env->regs[R_ESI], &sc->esi);
684
        err |= __put_user(env->regs[R_EBP], &sc->ebp);
685
        err |= __put_user(env->regs[R_ESP], &sc->esp);
686
        err |= __put_user(env->regs[R_EBX], &sc->ebx);
687
        err |= __put_user(env->regs[R_EDX], &sc->edx);
688
        err |= __put_user(env->regs[R_ECX], &sc->ecx);
689
        err |= __put_user(env->regs[R_EAX], &sc->eax);
690
        err |= __put_user(env->exception_index, &sc->trapno);
691
        err |= __put_user(env->error_code, &sc->err);
692
        err |= __put_user(env->eip, &sc->eip);
693
        err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
694
        err |= __put_user(env->eflags, &sc->eflags);
695
        err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
696
        err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
697

    
698
        cpu_x86_fsave(env, (void *)fpstate, 1);
699
        fpstate->status = fpstate->sw;
700
        err |= __put_user(0xffff, &fpstate->magic);
701
        err |= __put_user(fpstate, &sc->fpstate);
702

    
703
        /* non-iBCS2 extensions.. */
704
        err |= __put_user(mask, &sc->oldmask);
705
        err |= __put_user(env->cr[2], &sc->cr2);
706
        return err;
707
}
708

    
709
/*
710
 * Determine which stack to use..
711
 */
712

    
713
static inline void *
714
get_sigframe(struct emulated_sigaction *ka, CPUX86State *env, size_t frame_size)
715
{
716
        unsigned long esp;
717

    
718
        /* Default to using normal stack */
719
        esp = env->regs[R_ESP];
720
        /* This is the X/Open sanctioned signal stack switching.  */
721
        if (ka->sa.sa_flags & TARGET_SA_ONSTACK) {
722
            if (sas_ss_flags(esp) == 0)
723
                esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
724
        }
725

    
726
        /* This is the legacy signal stack switching. */
727
        else
728
        if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
729
            !(ka->sa.sa_flags & TARGET_SA_RESTORER) &&
730
            ka->sa.sa_restorer) {
731
            esp = (unsigned long) ka->sa.sa_restorer;
732
        }
733
        return g2h((esp - frame_size) & -8ul);
734
}
735

    
736
static void setup_frame(int sig, struct emulated_sigaction *ka,
737
                        target_sigset_t *set, CPUX86State *env)
738
{
739
        struct sigframe *frame;
740
        int i, err = 0;
741

    
742
        frame = get_sigframe(ka, env, sizeof(*frame));
743

    
744
        if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
745
                goto give_sigsegv;
746
        err |= __put_user((/*current->exec_domain
747
                           && current->exec_domain->signal_invmap
748
                           && sig < 32
749
                           ? current->exec_domain->signal_invmap[sig]
750
                           : */ sig),
751
                          &frame->sig);
752
        if (err)
753
                goto give_sigsegv;
754

    
755
        setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0]);
756
        if (err)
757
                goto give_sigsegv;
758

    
759
        for(i = 1; i < TARGET_NSIG_WORDS; i++) {
760
            if (__put_user(set->sig[i], &frame->extramask[i - 1]))
761
                goto give_sigsegv;
762
        }
763

    
764
        /* Set up to return from userspace.  If provided, use a stub
765
           already in userspace.  */
766
        if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
767
                err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
768
        } else {
769
                err |= __put_user(frame->retcode, &frame->pretcode);
770
                /* This is popl %eax ; movl $,%eax ; int $0x80 */
771
                err |= __put_user(0xb858, (short *)(frame->retcode+0));
772
#if defined(TARGET_X86_64)
773
#warning "Fix this !"
774
#else
775
                err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
776
#endif
777
                err |= __put_user(0x80cd, (short *)(frame->retcode+6));
778
        }
779

    
780
        if (err)
781
                goto give_sigsegv;
782

    
783
        /* Set up registers for signal handler */
784
        env->regs[R_ESP] = h2g(frame);
785
        env->eip = (unsigned long) ka->sa._sa_handler;
786

    
787
        cpu_x86_load_seg(env, R_DS, __USER_DS);
788
        cpu_x86_load_seg(env, R_ES, __USER_DS);
789
        cpu_x86_load_seg(env, R_SS, __USER_DS);
790
        cpu_x86_load_seg(env, R_CS, __USER_CS);
791
        env->eflags &= ~TF_MASK;
792

    
793
        return;
794

    
795
give_sigsegv:
796
        if (sig == TARGET_SIGSEGV)
797
                ka->sa._sa_handler = TARGET_SIG_DFL;
798
        force_sig(TARGET_SIGSEGV /* , current */);
799
}
800

    
801
static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
802
                           target_siginfo_t *info,
803
                           target_sigset_t *set, CPUX86State *env)
804
{
805
        struct rt_sigframe *frame;
806
        int i, err = 0;
807

    
808
        frame = get_sigframe(ka, env, sizeof(*frame));
809

    
810
        if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
811
                goto give_sigsegv;
812

    
813
        err |= __put_user((/*current->exec_domain
814
                               && current->exec_domain->signal_invmap
815
                               && sig < 32
816
                               ? current->exec_domain->signal_invmap[sig]
817
                           : */sig),
818
                          &frame->sig);
819
        err |= __put_user((abi_ulong)&frame->info, &frame->pinfo);
820
        err |= __put_user((abi_ulong)&frame->uc, &frame->puc);
821
        err |= copy_siginfo_to_user(&frame->info, info);
822
        if (err)
823
                goto give_sigsegv;
824

    
825
        /* Create the ucontext.  */
826
        err |= __put_user(0, &frame->uc.tuc_flags);
827
        err |= __put_user(0, &frame->uc.tuc_link);
828
        err |= __put_user(target_sigaltstack_used.ss_sp,
829
                          &frame->uc.tuc_stack.ss_sp);
830
        err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
831
                          &frame->uc.tuc_stack.ss_flags);
832
        err |= __put_user(target_sigaltstack_used.ss_size,
833
                          &frame->uc.tuc_stack.ss_size);
834
        err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
835
                                env, set->sig[0]);
836
        for(i = 0; i < TARGET_NSIG_WORDS; i++) {
837
            if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
838
                goto give_sigsegv;
839
        }
840

    
841
        /* Set up to return from userspace.  If provided, use a stub
842
           already in userspace.  */
843
        if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
844
                err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
845
        } else {
846
                err |= __put_user(frame->retcode, &frame->pretcode);
847
                /* This is movl $,%eax ; int $0x80 */
848
                err |= __put_user(0xb8, (char *)(frame->retcode+0));
849
                err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
850
                err |= __put_user(0x80cd, (short *)(frame->retcode+5));
851
        }
852

    
853
        if (err)
854
                goto give_sigsegv;
855

    
856
        /* Set up registers for signal handler */
857
        env->regs[R_ESP] = (unsigned long) frame;
858
        env->eip = (unsigned long) ka->sa._sa_handler;
859

    
860
        cpu_x86_load_seg(env, R_DS, __USER_DS);
861
        cpu_x86_load_seg(env, R_ES, __USER_DS);
862
        cpu_x86_load_seg(env, R_SS, __USER_DS);
863
        cpu_x86_load_seg(env, R_CS, __USER_CS);
864
        env->eflags &= ~TF_MASK;
865

    
866
        return;
867

    
868
give_sigsegv:
869
        if (sig == TARGET_SIGSEGV)
870
                ka->sa._sa_handler = TARGET_SIG_DFL;
871
        force_sig(TARGET_SIGSEGV /* , current */);
872
}
873

    
874
static int
875
restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
876
{
877
        unsigned int err = 0;
878

    
879
        cpu_x86_load_seg(env, R_GS, lduw(&sc->gs));
880
        cpu_x86_load_seg(env, R_FS, lduw(&sc->fs));
881
        cpu_x86_load_seg(env, R_ES, lduw(&sc->es));
882
        cpu_x86_load_seg(env, R_DS, lduw(&sc->ds));
883

    
884
        env->regs[R_EDI] = ldl(&sc->edi);
885
        env->regs[R_ESI] = ldl(&sc->esi);
886
        env->regs[R_EBP] = ldl(&sc->ebp);
887
        env->regs[R_ESP] = ldl(&sc->esp);
888
        env->regs[R_EBX] = ldl(&sc->ebx);
889
        env->regs[R_EDX] = ldl(&sc->edx);
890
        env->regs[R_ECX] = ldl(&sc->ecx);
891
        env->eip = ldl(&sc->eip);
892

    
893
        cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
894
        cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
895

    
896
        {
897
                unsigned int tmpflags;
898
                tmpflags = ldl(&sc->eflags);
899
                env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
900
                //                regs->orig_eax = -1;                /* disable syscall checks */
901
        }
902

    
903
        {
904
                struct _fpstate * buf;
905
                buf = (void *)ldl(&sc->fpstate);
906
                if (buf) {
907
#if 0
908
                        if (verify_area(VERIFY_READ, buf, sizeof(*buf)))
909
                                goto badframe;
910
#endif
911
                        cpu_x86_frstor(env, (void *)buf, 1);
912
                }
913
        }
914

    
915
        *peax = ldl(&sc->eax);
916
        return err;
917
#if 0
918
badframe:
919
        return 1;
920
#endif
921
}
922

    
923
long do_sigreturn(CPUX86State *env)
924
{
925
    struct sigframe *frame = (struct sigframe *)g2h(env->regs[R_ESP] - 8);
926
    target_sigset_t target_set;
927
    sigset_t set;
928
    int eax, i;
929

    
930
#if defined(DEBUG_SIGNAL)
931
    fprintf(stderr, "do_sigreturn\n");
932
#endif
933
    /* set blocked signals */
934
    if (__get_user(target_set.sig[0], &frame->sc.oldmask))
935
        goto badframe;
936
    for(i = 1; i < TARGET_NSIG_WORDS; i++) {
937
        if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
938
            goto badframe;
939
    }
940

    
941
    target_to_host_sigset_internal(&set, &target_set);
942
    sigprocmask(SIG_SETMASK, &set, NULL);
943

    
944
    /* restore registers */
945
    if (restore_sigcontext(env, &frame->sc, &eax))
946
        goto badframe;
947
    return eax;
948

    
949
badframe:
950
    force_sig(TARGET_SIGSEGV);
951
    return 0;
952
}
953

    
954
long do_rt_sigreturn(CPUX86State *env)
955
{
956
        struct rt_sigframe *frame = (struct rt_sigframe *)g2h(env->regs[R_ESP] - 4);
957
        sigset_t set;
958
        int eax;
959

    
960
#if 0
961
        if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
962
                goto badframe;
963
#endif
964
        target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
965
        sigprocmask(SIG_SETMASK, &set, NULL);
966

    
967
        if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
968
                goto badframe;
969

    
970
        if (do_sigaltstack(&frame->uc.tuc_stack, NULL, get_sp_from_cpustate(env)) == -EFAULT)
971
                goto badframe;
972

    
973
        return eax;
974

    
975
badframe:
976
        force_sig(TARGET_SIGSEGV);
977
        return 0;
978
}
979

    
980
#elif defined(TARGET_ARM)
981

    
982
struct target_sigcontext {
983
        abi_ulong trap_no;
984
        abi_ulong error_code;
985
        abi_ulong oldmask;
986
        abi_ulong arm_r0;
987
        abi_ulong arm_r1;
988
        abi_ulong arm_r2;
989
        abi_ulong arm_r3;
990
        abi_ulong arm_r4;
991
        abi_ulong arm_r5;
992
        abi_ulong arm_r6;
993
        abi_ulong arm_r7;
994
        abi_ulong arm_r8;
995
        abi_ulong arm_r9;
996
        abi_ulong arm_r10;
997
        abi_ulong arm_fp;
998
        abi_ulong arm_ip;
999
        abi_ulong arm_sp;
1000
        abi_ulong arm_lr;
1001
        abi_ulong arm_pc;
1002
        abi_ulong arm_cpsr;
1003
        abi_ulong fault_address;
1004
};
1005

    
1006
struct target_ucontext {
1007
    abi_ulong tuc_flags;
1008
    abi_ulong tuc_link;
1009
    target_stack_t tuc_stack;
1010
    struct target_sigcontext tuc_mcontext;
1011
    target_sigset_t  tuc_sigmask;        /* mask last for extensibility */
1012
};
1013

    
1014
struct sigframe
1015
{
1016
    struct target_sigcontext sc;
1017
    abi_ulong extramask[TARGET_NSIG_WORDS-1];
1018
    abi_ulong retcode;
1019
};
1020

    
1021
struct rt_sigframe
1022
{
1023
    struct target_siginfo *pinfo;
1024
    void *puc;
1025
    struct target_siginfo info;
1026
    struct target_ucontext uc;
1027
    abi_ulong retcode;
1028
};
1029

    
1030
#define TARGET_CONFIG_CPU_32 1
1031

    
1032
/*
1033
 * For ARM syscalls, we encode the syscall number into the instruction.
1034
 */
1035
#define SWI_SYS_SIGRETURN        (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
1036
#define SWI_SYS_RT_SIGRETURN        (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
1037

    
1038
/*
1039
 * For Thumb syscalls, we pass the syscall number via r7.  We therefore
1040
 * need two 16-bit instructions.
1041
 */
1042
#define SWI_THUMB_SIGRETURN        (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
1043
#define SWI_THUMB_RT_SIGRETURN        (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
1044

    
1045
static const abi_ulong retcodes[4] = {
1046
        SWI_SYS_SIGRETURN,        SWI_THUMB_SIGRETURN,
1047
        SWI_SYS_RT_SIGRETURN,        SWI_THUMB_RT_SIGRETURN
1048
};
1049

    
1050

    
1051
#define __put_user_error(x,p,e) __put_user(x, p)
1052
#define __get_user_error(x,p,e) __get_user(x, p)
1053

    
1054
static inline int valid_user_regs(CPUState *regs)
1055
{
1056
    return 1;
1057
}
1058

    
1059
static int
1060
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1061
                 CPUState *env, unsigned long mask)
1062
{
1063
        int err = 0;
1064

    
1065
        __put_user_error(env->regs[0], &sc->arm_r0, err);
1066
        __put_user_error(env->regs[1], &sc->arm_r1, err);
1067
        __put_user_error(env->regs[2], &sc->arm_r2, err);
1068
        __put_user_error(env->regs[3], &sc->arm_r3, err);
1069
        __put_user_error(env->regs[4], &sc->arm_r4, err);
1070
        __put_user_error(env->regs[5], &sc->arm_r5, err);
1071
        __put_user_error(env->regs[6], &sc->arm_r6, err);
1072
        __put_user_error(env->regs[7], &sc->arm_r7, err);
1073
        __put_user_error(env->regs[8], &sc->arm_r8, err);
1074
        __put_user_error(env->regs[9], &sc->arm_r9, err);
1075
        __put_user_error(env->regs[10], &sc->arm_r10, err);
1076
        __put_user_error(env->regs[11], &sc->arm_fp, err);
1077
        __put_user_error(env->regs[12], &sc->arm_ip, err);
1078
        __put_user_error(env->regs[13], &sc->arm_sp, err);
1079
        __put_user_error(env->regs[14], &sc->arm_lr, err);
1080
        __put_user_error(env->regs[15], &sc->arm_pc, err);
1081
#ifdef TARGET_CONFIG_CPU_32
1082
        __put_user_error(cpsr_read(env), &sc->arm_cpsr, err);
1083
#endif
1084

    
1085
        __put_user_error(/* current->thread.trap_no */ 0, &sc->trap_no, err);
1086
        __put_user_error(/* current->thread.error_code */ 0, &sc->error_code, err);
1087
        __put_user_error(/* current->thread.address */ 0, &sc->fault_address, err);
1088
        __put_user_error(mask, &sc->oldmask, err);
1089

    
1090
        return err;
1091
}
1092

    
1093
static inline void *
1094
get_sigframe(struct emulated_sigaction *ka, CPUState *regs, int framesize)
1095
{
1096
        unsigned long sp = regs->regs[13];
1097

    
1098
        /*
1099
         * This is the X/Open sanctioned signal stack switching.
1100
         */
1101
        if ((ka->sa.sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
1102
            sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1103
        /*
1104
         * ATPCS B01 mandates 8-byte alignment
1105
         */
1106
        return g2h((sp - framesize) & ~7);
1107
}
1108

    
1109
static int
1110
setup_return(CPUState *env, struct emulated_sigaction *ka,
1111
             abi_ulong *rc, void *frame, int usig)
1112
{
1113
        abi_ulong handler = (abi_ulong)ka->sa._sa_handler;
1114
        abi_ulong retcode;
1115
        int thumb = 0;
1116
#if defined(TARGET_CONFIG_CPU_32)
1117
#if 0
1118
        abi_ulong cpsr = env->cpsr;
1119

1120
        /*
1121
         * Maybe we need to deliver a 32-bit signal to a 26-bit task.
1122
         */
1123
        if (ka->sa.sa_flags & SA_THIRTYTWO)
1124
                cpsr = (cpsr & ~MODE_MASK) | USR_MODE;
1125

1126
#ifdef CONFIG_ARM_THUMB
1127
        if (elf_hwcap & HWCAP_THUMB) {
1128
                /*
1129
                 * The LSB of the handler determines if we're going to
1130
                 * be using THUMB or ARM mode for this signal handler.
1131
                 */
1132
                thumb = handler & 1;
1133

1134
                if (thumb)
1135
                        cpsr |= T_BIT;
1136
                else
1137
                        cpsr &= ~T_BIT;
1138
        }
1139
#endif /* CONFIG_ARM_THUMB */
1140
#endif /* 0 */
1141
#endif /* TARGET_CONFIG_CPU_32 */
1142

    
1143
        if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
1144
                retcode = (abi_ulong)ka->sa.sa_restorer;
1145
        } else {
1146
                unsigned int idx = thumb;
1147

    
1148
                if (ka->sa.sa_flags & TARGET_SA_SIGINFO)
1149
                        idx += 2;
1150

    
1151
                if (__put_user(retcodes[idx], rc))
1152
                        return 1;
1153
#if 0
1154
                flush_icache_range((abi_ulong)rc,
1155
                                   (abi_ulong)(rc + 1));
1156
#endif
1157
                retcode = ((abi_ulong)rc) + thumb;
1158
        }
1159

    
1160
        env->regs[0] = usig;
1161
        env->regs[13] = h2g(frame);
1162
        env->regs[14] = retcode;
1163
        env->regs[15] = handler & (thumb ? ~1 : ~3);
1164

    
1165
#if 0
1166
#ifdef TARGET_CONFIG_CPU_32
1167
        env->cpsr = cpsr;
1168
#endif
1169
#endif
1170

    
1171
        return 0;
1172
}
1173

    
1174
static void setup_frame(int usig, struct emulated_sigaction *ka,
1175
                        target_sigset_t *set, CPUState *regs)
1176
{
1177
        struct sigframe *frame = get_sigframe(ka, regs, sizeof(*frame));
1178
        int i, err = 0;
1179

    
1180
        err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]);
1181

    
1182
        for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1183
            if (__put_user(set->sig[i], &frame->extramask[i - 1]))
1184
                return;
1185
        }
1186

    
1187
        if (err == 0)
1188
            err = setup_return(regs, ka, &frame->retcode, frame, usig);
1189
        //        return err;
1190
}
1191

    
1192
static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
1193
                           target_siginfo_t *info,
1194
                           target_sigset_t *set, CPUState *env)
1195
{
1196
        struct rt_sigframe *frame = get_sigframe(ka, env, sizeof(*frame));
1197
        struct target_sigaltstack stack;
1198
        int i, err = 0;
1199

    
1200
        if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
1201
            return /* 1 */;
1202

    
1203
        __put_user_error(&frame->info, (abi_ulong *)&frame->pinfo, err);
1204
        __put_user_error(&frame->uc, (abi_ulong *)&frame->puc, err);
1205
        err |= copy_siginfo_to_user(&frame->info, info);
1206

    
1207
        /* Clear all the bits of the ucontext we don't use.  */
1208
        memset(&frame->uc, 0, offsetof(struct target_ucontext, tuc_mcontext));
1209

    
1210
        memset(&stack, 0, sizeof(stack));
1211
        __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1212
        __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1213
        __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1214
        if (!access_ok(VERIFY_WRITE, &frame->uc.tuc_stack, sizeof(stack)))
1215
            err = 1;
1216
        else
1217
            memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
1218

    
1219
        err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
1220
                                env, set->sig[0]);
1221
        for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1222
            if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
1223
                return;
1224
        }
1225

    
1226
        if (err == 0)
1227
                err = setup_return(env, ka, &frame->retcode, frame, usig);
1228

    
1229
        if (err == 0) {
1230
                /*
1231
                 * For realtime signals we must also set the second and third
1232
                 * arguments for the signal handler.
1233
                 *   -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
1234
                 */
1235
            env->regs[1] = (abi_ulong)frame->pinfo;
1236
            env->regs[2] = (abi_ulong)frame->puc;
1237
        }
1238

    
1239
        //        return err;
1240
}
1241

    
1242
static int
1243
restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
1244
{
1245
        int err = 0;
1246
        uint32_t cpsr;
1247

    
1248
        __get_user_error(env->regs[0], &sc->arm_r0, err);
1249
        __get_user_error(env->regs[1], &sc->arm_r1, err);
1250
        __get_user_error(env->regs[2], &sc->arm_r2, err);
1251
        __get_user_error(env->regs[3], &sc->arm_r3, err);
1252
        __get_user_error(env->regs[4], &sc->arm_r4, err);
1253
        __get_user_error(env->regs[5], &sc->arm_r5, err);
1254
        __get_user_error(env->regs[6], &sc->arm_r6, err);
1255
        __get_user_error(env->regs[7], &sc->arm_r7, err);
1256
        __get_user_error(env->regs[8], &sc->arm_r8, err);
1257
        __get_user_error(env->regs[9], &sc->arm_r9, err);
1258
        __get_user_error(env->regs[10], &sc->arm_r10, err);
1259
        __get_user_error(env->regs[11], &sc->arm_fp, err);
1260
        __get_user_error(env->regs[12], &sc->arm_ip, err);
1261
        __get_user_error(env->regs[13], &sc->arm_sp, err);
1262
        __get_user_error(env->regs[14], &sc->arm_lr, err);
1263
        __get_user_error(env->regs[15], &sc->arm_pc, err);
1264
#ifdef TARGET_CONFIG_CPU_32
1265
        __get_user_error(cpsr, &sc->arm_cpsr, err);
1266
        cpsr_write(env, cpsr, 0xffffffff);
1267
#endif
1268

    
1269
        err |= !valid_user_regs(env);
1270

    
1271
        return err;
1272
}
1273

    
1274
long do_sigreturn(CPUState *env)
1275
{
1276
        struct sigframe *frame;
1277
        target_sigset_t set;
1278
        sigset_t host_set;
1279
        int i;
1280

    
1281
        /*
1282
         * Since we stacked the signal on a 64-bit boundary,
1283
         * then 'sp' should be word aligned here.  If it's
1284
         * not, then the user is trying to mess with us.
1285
         */
1286
        if (env->regs[13] & 7)
1287
                goto badframe;
1288

    
1289
        frame = (struct sigframe *)g2h(env->regs[13]);
1290

    
1291
#if 0
1292
        if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
1293
                goto badframe;
1294
#endif
1295
        if (__get_user(set.sig[0], &frame->sc.oldmask))
1296
            goto badframe;
1297
        for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1298
            if (__get_user(set.sig[i], &frame->extramask[i - 1]))
1299
                goto badframe;
1300
        }
1301

    
1302
        target_to_host_sigset_internal(&host_set, &set);
1303
        sigprocmask(SIG_SETMASK, &host_set, NULL);
1304

    
1305
        if (restore_sigcontext(env, &frame->sc))
1306
                goto badframe;
1307

    
1308
#if 0
1309
        /* Send SIGTRAP if we're single-stepping */
1310
        if (ptrace_cancel_bpt(current))
1311
                send_sig(SIGTRAP, current, 1);
1312
#endif
1313
        return env->regs[0];
1314

    
1315
badframe:
1316
        force_sig(SIGSEGV /* , current */);
1317
        return 0;
1318
}
1319

    
1320
long do_rt_sigreturn(CPUState *env)
1321
{
1322
        struct rt_sigframe *frame;
1323
        sigset_t host_set;
1324

    
1325
        /*
1326
         * Since we stacked the signal on a 64-bit boundary,
1327
         * then 'sp' should be word aligned here.  If it's
1328
         * not, then the user is trying to mess with us.
1329
         */
1330
        if (env->regs[13] & 7)
1331
                goto badframe;
1332

    
1333
        frame = (struct rt_sigframe *)env->regs[13];
1334

    
1335
#if 0
1336
        if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
1337
                goto badframe;
1338
#endif
1339
        target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
1340
        sigprocmask(SIG_SETMASK, &host_set, NULL);
1341

    
1342
        if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
1343
                goto badframe;
1344

    
1345
        if (do_sigaltstack(&frame->uc.tuc_stack, NULL, get_sp_from_cpustate(env)) == -EFAULT)
1346
                goto badframe;
1347

    
1348
#if 0
1349
        /* Send SIGTRAP if we're single-stepping */
1350
        if (ptrace_cancel_bpt(current))
1351
                send_sig(SIGTRAP, current, 1);
1352
#endif
1353
        return env->regs[0];
1354

    
1355
badframe:
1356
        force_sig(SIGSEGV /* , current */);
1357
        return 0;
1358
}
1359

    
1360
#elif defined(TARGET_SPARC)
1361

    
1362
#define __SUNOS_MAXWIN   31
1363

    
1364
/* This is what SunOS does, so shall I. */
1365
struct target_sigcontext {
1366
        abi_ulong sigc_onstack;      /* state to restore */
1367

    
1368
        abi_ulong sigc_mask;         /* sigmask to restore */
1369
        abi_ulong sigc_sp;           /* stack pointer */
1370
        abi_ulong sigc_pc;           /* program counter */
1371
        abi_ulong sigc_npc;          /* next program counter */
1372
        abi_ulong sigc_psr;          /* for condition codes etc */
1373
        abi_ulong sigc_g1;           /* User uses these two registers */
1374
        abi_ulong sigc_o0;           /* within the trampoline code. */
1375

    
1376
        /* Now comes information regarding the users window set
1377
         * at the time of the signal.
1378
         */
1379
        abi_ulong sigc_oswins;       /* outstanding windows */
1380

    
1381
        /* stack ptrs for each regwin buf */
1382
        char *sigc_spbuf[__SUNOS_MAXWIN];
1383

    
1384
        /* Windows to restore after signal */
1385
        struct {
1386
                abi_ulong locals[8];
1387
                abi_ulong ins[8];
1388
        } sigc_wbuf[__SUNOS_MAXWIN];
1389
};
1390
/* A Sparc stack frame */
1391
struct sparc_stackf {
1392
        abi_ulong locals[8];
1393
        abi_ulong ins[6];
1394
        struct sparc_stackf *fp;
1395
        abi_ulong callers_pc;
1396
        char *structptr;
1397
        abi_ulong xargs[6];
1398
        abi_ulong xxargs[1];
1399
};
1400

    
1401
typedef struct {
1402
        struct {
1403
                abi_ulong psr;
1404
                abi_ulong pc;
1405
                abi_ulong npc;
1406
                abi_ulong y;
1407
                abi_ulong u_regs[16]; /* globals and ins */
1408
        }               si_regs;
1409
        int             si_mask;
1410
} __siginfo_t;
1411

    
1412
typedef struct {
1413
        unsigned   long si_float_regs [32];
1414
        unsigned   long si_fsr;
1415
        unsigned   long si_fpqdepth;
1416
        struct {
1417
                unsigned long *insn_addr;
1418
                unsigned long insn;
1419
        } si_fpqueue [16];
1420
} qemu_siginfo_fpu_t;
1421

    
1422

    
1423
struct target_signal_frame {
1424
        struct sparc_stackf        ss;
1425
        __siginfo_t                info;
1426
        qemu_siginfo_fpu_t         *fpu_save;
1427
        abi_ulong                insns[2] __attribute__ ((aligned (8)));
1428
        abi_ulong                extramask[TARGET_NSIG_WORDS - 1];
1429
        abi_ulong                extra_size; /* Should be 0 */
1430
        qemu_siginfo_fpu_t        fpu_state;
1431
};
1432
struct target_rt_signal_frame {
1433
        struct sparc_stackf        ss;
1434
        siginfo_t                info;
1435
        abi_ulong                regs[20];
1436
        sigset_t                mask;
1437
        qemu_siginfo_fpu_t         *fpu_save;
1438
        unsigned int                insns[2];
1439
        stack_t                        stack;
1440
        unsigned int                extra_size; /* Should be 0 */
1441
        qemu_siginfo_fpu_t        fpu_state;
1442
};
1443

    
1444
#define UREG_O0        16
1445
#define UREG_O6        22
1446
#define UREG_I0        0
1447
#define UREG_I1        1
1448
#define UREG_I2        2
1449
#define UREG_I3        3
1450
#define UREG_I4        4
1451
#define UREG_I5        5
1452
#define UREG_I6        6
1453
#define UREG_I7        7
1454
#define UREG_L0               8
1455
#define UREG_FP        UREG_I6
1456
#define UREG_SP        UREG_O6
1457

    
1458
static inline void *get_sigframe(struct emulated_sigaction *sa, CPUState *env, unsigned long framesize)
1459
{
1460
        unsigned long sp;
1461

    
1462
        sp = env->regwptr[UREG_FP];
1463

    
1464
        /* This is the X/Open sanctioned signal stack switching.  */
1465
        if (sa->sa.sa_flags & TARGET_SA_ONSTACK) {
1466
            if (!on_sig_stack(sp)
1467
                && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
1468
                sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1469
        }
1470
        return g2h(sp - framesize);
1471
}
1472

    
1473
static int
1474
setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask)
1475
{
1476
        int err = 0, i;
1477

    
1478
        err |= __put_user(env->psr, &si->si_regs.psr);
1479
        err |= __put_user(env->pc, &si->si_regs.pc);
1480
        err |= __put_user(env->npc, &si->si_regs.npc);
1481
        err |= __put_user(env->y, &si->si_regs.y);
1482
        for (i=0; i < 8; i++) {
1483
                err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
1484
        }
1485
        for (i=0; i < 8; i++) {
1486
                err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
1487
        }
1488
        err |= __put_user(mask, &si->si_mask);
1489
        return err;
1490
}
1491

    
1492
#if 0
1493
static int
1494
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1495
                 CPUState *env, unsigned long mask)
1496
{
1497
        int err = 0;
1498

1499
        err |= __put_user(mask, &sc->sigc_mask);
1500
        err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
1501
        err |= __put_user(env->pc, &sc->sigc_pc);
1502
        err |= __put_user(env->npc, &sc->sigc_npc);
1503
        err |= __put_user(env->psr, &sc->sigc_psr);
1504
        err |= __put_user(env->gregs[1], &sc->sigc_g1);
1505
        err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
1506

1507
        return err;
1508
}
1509
#endif
1510
#define NF_ALIGNEDSZ  (((sizeof(struct target_signal_frame) + 7) & (~7)))
1511

    
1512
static void setup_frame(int sig, struct emulated_sigaction *ka,
1513
                        target_sigset_t *set, CPUState *env)
1514
{
1515
        struct target_signal_frame *sf;
1516
        int sigframe_size, err, i;
1517

    
1518
        /* 1. Make sure everything is clean */
1519
        //synchronize_user_stack();
1520

    
1521
        sigframe_size = NF_ALIGNEDSZ;
1522

    
1523
        sf = (struct target_signal_frame *)
1524
                get_sigframe(ka, env, sigframe_size);
1525

    
1526
        //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1527
#if 0
1528
        if (invalid_frame_pointer(sf, sigframe_size))
1529
                goto sigill_and_return;
1530
#endif
1531
        /* 2. Save the current process state */
1532
        err = setup___siginfo(&sf->info, env, set->sig[0]);
1533
        err |= __put_user(0, &sf->extra_size);
1534

    
1535
        //err |= save_fpu_state(regs, &sf->fpu_state);
1536
        //err |= __put_user(&sf->fpu_state, &sf->fpu_save);
1537

    
1538
        err |= __put_user(set->sig[0], &sf->info.si_mask);
1539
        for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
1540
                err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
1541
        }
1542

    
1543
        for (i = 0; i < 8; i++) {
1544
                  err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
1545
        }
1546
        for (i = 0; i < 8; i++) {
1547
                  err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
1548
        }
1549
        if (err)
1550
                goto sigsegv;
1551

    
1552
        /* 3. signal handler back-trampoline and parameters */
1553
        env->regwptr[UREG_FP] = h2g(sf);
1554
        env->regwptr[UREG_I0] = sig;
1555
        env->regwptr[UREG_I1] = h2g(&sf->info);
1556
        env->regwptr[UREG_I2] = h2g(&sf->info);
1557

    
1558
        /* 4. signal handler */
1559
        env->pc = (unsigned long) ka->sa._sa_handler;
1560
        env->npc = (env->pc + 4);
1561
        /* 5. return to kernel instructions */
1562
        if (ka->sa.sa_restorer)
1563
                env->regwptr[UREG_I7] = (unsigned long)ka->sa.sa_restorer;
1564
        else {
1565
                env->regwptr[UREG_I7] = h2g(&(sf->insns[0]) - 2);
1566

    
1567
                /* mov __NR_sigreturn, %g1 */
1568
                err |= __put_user(0x821020d8, &sf->insns[0]);
1569

    
1570
                /* t 0x10 */
1571
                err |= __put_user(0x91d02010, &sf->insns[1]);
1572
                if (err)
1573
                        goto sigsegv;
1574

    
1575
                /* Flush instruction space. */
1576
                //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
1577
                //                tb_flush(env);
1578
        }
1579
        return;
1580

    
1581
        //sigill_and_return:
1582
        force_sig(TARGET_SIGILL);
1583
sigsegv:
1584
        //fprintf(stderr, "force_sig\n");
1585
        force_sig(TARGET_SIGSEGV);
1586
}
1587
static inline int
1588
restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu)
1589
{
1590
        int err;
1591
#if 0
1592
#ifdef CONFIG_SMP
1593
        if (current->flags & PF_USEDFPU)
1594
                regs->psr &= ~PSR_EF;
1595
#else
1596
        if (current == last_task_used_math) {
1597
                last_task_used_math = 0;
1598
                regs->psr &= ~PSR_EF;
1599
        }
1600
#endif
1601
        current->used_math = 1;
1602
        current->flags &= ~PF_USEDFPU;
1603
#endif
1604
#if 0
1605
        if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
1606
                return -EFAULT;
1607
#endif
1608

    
1609
#if 0
1610
        /* XXX: incorrect */
1611
        err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
1612
                                     (sizeof(unsigned long) * 32));
1613
#endif
1614
        err |= __get_user(env->fsr, &fpu->si_fsr);
1615
#if 0
1616
        err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
1617
        if (current->thread.fpqdepth != 0)
1618
                err |= __copy_from_user(&current->thread.fpqueue[0],
1619
                                        &fpu->si_fpqueue[0],
1620
                                        ((sizeof(unsigned long) +
1621
                                        (sizeof(unsigned long *)))*16));
1622
#endif
1623
        return err;
1624
}
1625

    
1626

    
1627
static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
1628
                           target_siginfo_t *info,
1629
                           target_sigset_t *set, CPUState *env)
1630
{
1631
    fprintf(stderr, "setup_rt_frame: not implemented\n");
1632
}
1633

    
1634
long do_sigreturn(CPUState *env)
1635
{
1636
        struct target_signal_frame *sf;
1637
        uint32_t up_psr, pc, npc;
1638
        target_sigset_t set;
1639
        sigset_t host_set;
1640
        abi_ulong fpu_save;
1641
        int err, i;
1642

    
1643
        sf = (struct target_signal_frame *)g2h(env->regwptr[UREG_FP]);
1644
#if 0
1645
        fprintf(stderr, "sigreturn\n");
1646
        fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1647
#endif
1648
        //cpu_dump_state(env, stderr, fprintf, 0);
1649

    
1650
        /* 1. Make sure we are not getting garbage from the user */
1651
#if 0
1652
        if (verify_area (VERIFY_READ, sf, sizeof (*sf)))
1653
                goto segv_and_exit;
1654
#endif
1655

    
1656
        if (((uint) sf) & 3)
1657
                goto segv_and_exit;
1658

    
1659
        err = __get_user(pc,  &sf->info.si_regs.pc);
1660
        err |= __get_user(npc, &sf->info.si_regs.npc);
1661

    
1662
        if ((pc | npc) & 3)
1663
                goto segv_and_exit;
1664

    
1665
        /* 2. Restore the state */
1666
        err |= __get_user(up_psr, &sf->info.si_regs.psr);
1667

    
1668
        /* User can only change condition codes and FPU enabling in %psr. */
1669
        env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
1670
                  | (env->psr & ~(PSR_ICC /* | PSR_EF */));
1671

    
1672
        env->pc = pc;
1673
        env->npc = npc;
1674
        err |= __get_user(env->y, &sf->info.si_regs.y);
1675
        for (i=0; i < 8; i++) {
1676
                err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
1677
        }
1678
        for (i=0; i < 8; i++) {
1679
                err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
1680
        }
1681

    
1682
        err |= __get_user(fpu_save, (abi_ulong *)&sf->fpu_save);
1683

    
1684
        //if (fpu_save)
1685
        //        err |= restore_fpu_state(env, fpu_save);
1686

    
1687
        /* This is pretty much atomic, no amount locking would prevent
1688
         * the races which exist anyways.
1689
         */
1690
        err |= __get_user(set.sig[0], &sf->info.si_mask);
1691
        for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1692
            err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
1693
        }
1694

    
1695
        target_to_host_sigset_internal(&host_set, &set);
1696
        sigprocmask(SIG_SETMASK, &host_set, NULL);
1697

    
1698
        if (err)
1699
                goto segv_and_exit;
1700

    
1701
        return env->regwptr[0];
1702

    
1703
segv_and_exit:
1704
        force_sig(TARGET_SIGSEGV);
1705
}
1706

    
1707
long do_rt_sigreturn(CPUState *env)
1708
{
1709
    fprintf(stderr, "do_rt_sigreturn: not implemented\n");
1710
    return -ENOSYS;
1711
}
1712

    
1713
#ifdef TARGET_SPARC64
1714
#define MC_TSTATE 0
1715
#define MC_PC 1
1716
#define MC_NPC 2
1717
#define MC_Y 3
1718
#define MC_G1 4
1719
#define MC_G2 5
1720
#define MC_G3 6
1721
#define MC_G4 7
1722
#define MC_G5 8
1723
#define MC_G6 9
1724
#define MC_G7 10
1725
#define MC_O0 11
1726
#define MC_O1 12
1727
#define MC_O2 13
1728
#define MC_O3 14
1729
#define MC_O4 15
1730
#define MC_O5 16
1731
#define MC_O6 17
1732
#define MC_O7 18
1733
#define MC_NGREG 19
1734

    
1735
typedef abi_ulong target_mc_greg_t;
1736
typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
1737

    
1738
struct target_mc_fq {
1739
    abi_ulong *mcfq_addr;
1740
    uint32_t mcfq_insn;
1741
};
1742

    
1743
struct target_mc_fpu {
1744
    union {
1745
        uint32_t sregs[32];
1746
        uint64_t dregs[32];
1747
        //uint128_t qregs[16];
1748
    } mcfpu_fregs;
1749
    abi_ulong mcfpu_fsr;
1750
    abi_ulong mcfpu_fprs;
1751
    abi_ulong mcfpu_gsr;
1752
    struct target_mc_fq *mcfpu_fq;
1753
    unsigned char mcfpu_qcnt;
1754
    unsigned char mcfpu_qentsz;
1755
    unsigned char mcfpu_enab;
1756
};
1757
typedef struct target_mc_fpu target_mc_fpu_t;
1758

    
1759
typedef struct {
1760
    target_mc_gregset_t mc_gregs;
1761
    target_mc_greg_t mc_fp;
1762
    target_mc_greg_t mc_i7;
1763
    target_mc_fpu_t mc_fpregs;
1764
} target_mcontext_t;
1765

    
1766
struct target_ucontext {
1767
    struct target_ucontext *uc_link;
1768
    abi_ulong uc_flags;
1769
    target_sigset_t uc_sigmask;
1770
    target_mcontext_t uc_mcontext;
1771
};
1772

    
1773
/* A V9 register window */
1774
struct target_reg_window {
1775
    abi_ulong locals[8];
1776
    abi_ulong ins[8];
1777
};
1778

    
1779
#define TARGET_STACK_BIAS 2047
1780

    
1781
/* {set, get}context() needed for 64-bit SparcLinux userland. */
1782
void sparc64_set_context(CPUSPARCState *env)
1783
{
1784
    struct target_ucontext *ucp = (struct target_ucontext *)
1785
        env->regwptr[UREG_I0];
1786
    target_mc_gregset_t *grp;
1787
    abi_ulong pc, npc, tstate;
1788
    abi_ulong fp, i7;
1789
    unsigned char fenab;
1790
    int err;
1791
    unsigned int i;
1792
    abi_ulong *src, *dst;
1793

    
1794
    grp  = &ucp->uc_mcontext.mc_gregs;
1795
    err  = get_user(pc, &((*grp)[MC_PC]));
1796
    err |= get_user(npc, &((*grp)[MC_NPC]));
1797
    if (err || ((pc | npc) & 3))
1798
        goto do_sigsegv;
1799
    if (env->regwptr[UREG_I1]) {
1800
        target_sigset_t target_set;
1801
        sigset_t set;
1802

    
1803
        if (TARGET_NSIG_WORDS == 1) {
1804
            if (get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0]))
1805
                goto do_sigsegv;
1806
        } else {
1807
            src = &ucp->uc_sigmask;
1808
            dst = &target_set;
1809
            for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
1810
                 i++, dst++, src++)
1811
                err |= get_user(dst, src);
1812
            if (err)
1813
                goto do_sigsegv;
1814
        }
1815
        target_to_host_sigset_internal(&set, &target_set);
1816
        sigprocmask(SIG_SETMASK, &set, NULL);
1817
    }
1818
    env->pc = pc;
1819
    env->npc = npc;
1820
    err |= get_user(env->y, &((*grp)[MC_Y]));
1821
    err |= get_user(tstate, &((*grp)[MC_TSTATE]));
1822
    env->asi = (tstate >> 24) & 0xff;
1823
    PUT_CCR(env, tstate >> 32);
1824
    PUT_CWP64(env, tstate & 0x1f);
1825
    err |= get_user(env->gregs[1], (&(*grp)[MC_G1]));
1826
    err |= get_user(env->gregs[2], (&(*grp)[MC_G2]));
1827
    err |= get_user(env->gregs[3], (&(*grp)[MC_G3]));
1828
    err |= get_user(env->gregs[4], (&(*grp)[MC_G4]));
1829
    err |= get_user(env->gregs[5], (&(*grp)[MC_G5]));
1830
    err |= get_user(env->gregs[6], (&(*grp)[MC_G6]));
1831
    err |= get_user(env->gregs[7], (&(*grp)[MC_G7]));
1832
    err |= get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
1833
    err |= get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
1834
    err |= get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
1835
    err |= get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
1836
    err |= get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
1837
    err |= get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
1838
    err |= get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
1839
    err |= get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
1840

    
1841
    err |= get_user(fp, &(ucp->uc_mcontext.mc_fp));
1842
    err |= get_user(i7, &(ucp->uc_mcontext.mc_i7));
1843
    err |= put_user(fp,
1844
                    (&(((struct target_reg_window *)(TARGET_STACK_BIAS+env->regwptr[UREG_I6]))->ins[6])));
1845
    err |= put_user(i7,
1846
                    (&(((struct target_reg_window *)(TARGET_STACK_BIAS+env->regwptr[UREG_I6]))->ins[7])));
1847

    
1848
    err |= get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
1849
    err |= get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
1850
    src = &(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs);
1851
    dst = &env->fpr;
1852
    for (i = 0; i < 64; i++, dst++, src++)
1853
        err |= get_user(dst, src);
1854
    err |= get_user(env->fsr,
1855
                    &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
1856
    err |= get_user(env->gsr,
1857
                    &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
1858
    if (err)
1859
        goto do_sigsegv;
1860

    
1861
    return;
1862
 do_sigsegv:
1863
    force_sig(SIGSEGV);
1864
}
1865

    
1866
void sparc64_get_context(CPUSPARCState *env)
1867
{
1868
    struct target_ucontext *ucp = (struct target_ucontext *)
1869
        env->regwptr[UREG_I0];
1870
    target_mc_gregset_t *grp;
1871
    target_mcontext_t *mcp;
1872
    abi_ulong fp, i7;
1873
    int err;
1874
    unsigned int i;
1875
    abi_ulong *src, *dst;
1876
    target_sigset_t target_set;
1877
    sigset_t set;
1878

    
1879
    mcp = &ucp->uc_mcontext;
1880
    grp = &mcp->mc_gregs;
1881

    
1882
    /* Skip over the trap instruction, first. */
1883
    env->pc = env->npc;
1884
    env->npc += 4;
1885

    
1886
    err = 0;
1887

    
1888
    sigprocmask(0, NULL, &set);
1889
    host_to_target_sigset_internal(&target_set, &set);
1890
    if (TARGET_NSIG_WORDS == 1)
1891
        err |= put_user(target_set.sig[0],
1892
                        (abi_ulong *)&ucp->uc_sigmask);
1893
    else {
1894
        src = &target_set;
1895
        dst = &ucp->uc_sigmask;
1896
        for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
1897
             i++, dst++, src++)
1898
            err |= put_user(src, dst);
1899
        if (err)
1900
            goto do_sigsegv;
1901
    }
1902

    
1903
    err |= put_user(env->tstate, &((*grp)[MC_TSTATE]));
1904
    err |= put_user(env->pc, &((*grp)[MC_PC]));
1905
    err |= put_user(env->npc, &((*grp)[MC_NPC]));
1906
    err |= put_user(env->y, &((*grp)[MC_Y]));
1907
    err |= put_user(env->gregs[1], &((*grp)[MC_G1]));
1908
    err |= put_user(env->gregs[2], &((*grp)[MC_G2]));
1909
    err |= put_user(env->gregs[3], &((*grp)[MC_G3]));
1910
    err |= put_user(env->gregs[4], &((*grp)[MC_G4]));
1911
    err |= put_user(env->gregs[5], &((*grp)[MC_G5]));
1912
    err |= put_user(env->gregs[6], &((*grp)[MC_G6]));
1913
    err |= put_user(env->gregs[7], &((*grp)[MC_G7]));
1914
    err |= put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
1915
    err |= put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
1916
    err |= put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
1917
    err |= put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
1918
    err |= put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
1919
    err |= put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
1920
    err |= put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
1921
    err |= put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
1922

    
1923
    err |= get_user(fp,
1924
                    (&(((struct target_reg_window *)(TARGET_STACK_BIAS+env->regwptr[UREG_I6]))->ins[6])));
1925
    err |= get_user(i7,
1926
                    (&(((struct target_reg_window *)(TARGET_STACK_BIAS+env->regwptr[UREG_I6]))->ins[7])));
1927
    err |= put_user(fp, &(mcp->mc_fp));
1928
    err |= put_user(i7, &(mcp->mc_i7));
1929

    
1930
    src = &env->fpr;
1931
    dst = &(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs);
1932
    for (i = 0; i < 64; i++, dst++, src++)
1933
        err |= put_user(src, dst);
1934
    err |= put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
1935
    err |= put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
1936
    err |= put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
1937

    
1938
    if (err)
1939
        goto do_sigsegv;
1940

    
1941
    return;
1942
 do_sigsegv:
1943
    force_sig(SIGSEGV);
1944
}
1945
#endif
1946
#elif defined(TARGET_MIPS64)
1947

    
1948
# warning signal handling not implemented
1949

    
1950
static void setup_frame(int sig, struct emulated_sigaction *ka,
1951
                        target_sigset_t *set, CPUState *env)
1952
{
1953
    fprintf(stderr, "setup_frame: not implemented\n");
1954
}
1955

    
1956
static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
1957
                           target_siginfo_t *info,
1958
                           target_sigset_t *set, CPUState *env)
1959
{
1960
    fprintf(stderr, "setup_rt_frame: not implemented\n");
1961
}
1962

    
1963
long do_sigreturn(CPUState *env)
1964
{
1965
    fprintf(stderr, "do_sigreturn: not implemented\n");
1966
    return -ENOSYS;
1967
}
1968

    
1969
long do_rt_sigreturn(CPUState *env)
1970
{
1971
    fprintf(stderr, "do_rt_sigreturn: not implemented\n");
1972
    return -ENOSYS;
1973
}
1974

    
1975
#elif defined(TARGET_MIPSN32)
1976

    
1977
# warning signal handling not implemented
1978

    
1979
static void setup_frame(int sig, struct emulated_sigaction *ka,
1980
                        target_sigset_t *set, CPUState *env)
1981
{
1982
    fprintf(stderr, "setup_frame: not implemented\n");
1983
}
1984

    
1985
static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
1986
                           target_siginfo_t *info,
1987
                           target_sigset_t *set, CPUState *env)
1988
{
1989
    fprintf(stderr, "setup_rt_frame: not implemented\n");
1990
}
1991

    
1992
long do_sigreturn(CPUState *env)
1993
{
1994
    fprintf(stderr, "do_sigreturn: not implemented\n");
1995
    return -ENOSYS;
1996
}
1997

    
1998
long do_rt_sigreturn(CPUState *env)
1999
{
2000
    fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2001
    return -ENOSYS;
2002
}
2003

    
2004
#elif defined(TARGET_MIPS)
2005

    
2006
struct target_sigcontext {
2007
    uint32_t   sc_regmask;     /* Unused */
2008
    uint32_t   sc_status;
2009
    uint64_t   sc_pc;
2010
    uint64_t   sc_regs[32];
2011
    uint64_t   sc_fpregs[32];
2012
    uint32_t   sc_ownedfp;     /* Unused */
2013
    uint32_t   sc_fpc_csr;
2014
    uint32_t   sc_fpc_eir;     /* Unused */
2015
    uint32_t   sc_used_math;
2016
    uint32_t   sc_dsp;         /* dsp status, was sc_ssflags */
2017
    uint64_t   sc_mdhi;
2018
    uint64_t   sc_mdlo;
2019
    target_ulong   sc_hi1;         /* Was sc_cause */
2020
    target_ulong   sc_lo1;         /* Was sc_badvaddr */
2021
    target_ulong   sc_hi2;         /* Was sc_sigset[4] */
2022
    target_ulong   sc_lo2;
2023
    target_ulong   sc_hi3;
2024
    target_ulong   sc_lo3;
2025
};
2026

    
2027
struct sigframe {
2028
    uint32_t sf_ass[4];                        /* argument save space for o32 */
2029
    uint32_t sf_code[2];                        /* signal trampoline */
2030
    struct target_sigcontext sf_sc;
2031
    target_sigset_t sf_mask;
2032
};
2033

    
2034
/* Install trampoline to jump back from signal handler */
2035
static inline int install_sigtramp(unsigned int *tramp,   unsigned int syscall)
2036
{
2037
    int err;
2038

    
2039
    /*
2040
    * Set up the return code ...
2041
    *
2042
    *         li      v0, __NR__foo_sigreturn
2043
    *         syscall
2044
    */
2045

    
2046
    err = __put_user(0x24020000 + syscall, tramp + 0);
2047
    err |= __put_user(0x0000000c          , tramp + 1);
2048
    /* flush_cache_sigtramp((unsigned long) tramp); */
2049
    return err;
2050
}
2051

    
2052
static inline int
2053
setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2054
{
2055
    int err = 0;
2056

    
2057
    err |= __put_user(regs->PC[regs->current_tc], &sc->sc_pc);
2058

    
2059
#define save_gp_reg(i) do {                                                           \
2060
        err |= __put_user(regs->gpr[i][regs->current_tc], &sc->sc_regs[i]);        \
2061
    } while(0)
2062
    __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2);
2063
    save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6);
2064
    save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10);
2065
    save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
2066
    save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18);
2067
    save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22);
2068
    save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
2069
    save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30);
2070
    save_gp_reg(31);
2071
#undef save_gp_reg
2072

    
2073
    err |= __put_user(regs->HI[0][regs->current_tc], &sc->sc_mdhi);
2074
    err |= __put_user(regs->LO[0][regs->current_tc], &sc->sc_mdlo);
2075

    
2076
    /* Not used yet, but might be useful if we ever have DSP suppport */
2077
#if 0
2078
    if (cpu_has_dsp) {
2079
        err |= __put_user(mfhi1(), &sc->sc_hi1);
2080
        err |= __put_user(mflo1(), &sc->sc_lo1);
2081
        err |= __put_user(mfhi2(), &sc->sc_hi2);
2082
        err |= __put_user(mflo2(), &sc->sc_lo2);
2083
        err |= __put_user(mfhi3(), &sc->sc_hi3);
2084
        err |= __put_user(mflo3(), &sc->sc_lo3);
2085
        err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2086
    }
2087
    /* same with 64 bit */
2088
#ifdef CONFIG_64BIT
2089
    err |= __put_user(regs->hi, &sc->sc_hi[0]);
2090
    err |= __put_user(regs->lo, &sc->sc_lo[0]);
2091
    if (cpu_has_dsp) {
2092
        err |= __put_user(mfhi1(), &sc->sc_hi[1]);
2093
        err |= __put_user(mflo1(), &sc->sc_lo[1]);
2094
        err |= __put_user(mfhi2(), &sc->sc_hi[2]);
2095
        err |= __put_user(mflo2(), &sc->sc_lo[2]);
2096
        err |= __put_user(mfhi3(), &sc->sc_hi[3]);
2097
        err |= __put_user(mflo3(), &sc->sc_lo[3]);
2098
        err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2099
    }
2100
#endif
2101
#endif
2102

    
2103
#if 0
2104
    err |= __put_user(!!used_math(), &sc->sc_used_math);
2105

2106
    if (!used_math())
2107
        goto out;
2108

2109
    /*
2110
    * Save FPU state to signal context.  Signal handler will "inherit"
2111
    * current FPU state.
2112
    */
2113
    preempt_disable();
2114

2115
    if (!is_fpu_owner()) {
2116
        own_fpu();
2117
        restore_fp(current);
2118
    }
2119
    err |= save_fp_context(sc);
2120

2121
    preempt_enable();
2122
    out:
2123
#endif
2124
    return err;
2125
}
2126

    
2127
static inline int
2128
restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2129
{
2130
    int err = 0;
2131

    
2132
    err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
2133

    
2134
    err |= __get_user(regs->HI[0][regs->current_tc], &sc->sc_mdhi);
2135
    err |= __get_user(regs->LO[0][regs->current_tc], &sc->sc_mdlo);
2136

    
2137
#define restore_gp_reg(i) do {                                                           \
2138
        err |= __get_user(regs->gpr[i][regs->current_tc], &sc->sc_regs[i]);                \
2139
    } while(0)
2140
    restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3);
2141
    restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6);
2142
    restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9);
2143
    restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12);
2144
    restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15);
2145
    restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18);
2146
    restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21);
2147
    restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24);
2148
    restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27);
2149
    restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30);
2150
    restore_gp_reg(31);
2151
#undef restore_gp_reg
2152

    
2153
#if 0
2154
    if (cpu_has_dsp) {
2155
        err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
2156
        err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
2157
        err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
2158
        err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
2159
        err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
2160
        err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
2161
        err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2162
    }
2163
#ifdef CONFIG_64BIT
2164
    err |= __get_user(regs->hi, &sc->sc_hi[0]);
2165
    err |= __get_user(regs->lo, &sc->sc_lo[0]);
2166
    if (cpu_has_dsp) {
2167
        err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
2168
        err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
2169
        err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
2170
        err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
2171
        err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
2172
        err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
2173
        err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2174
    }
2175
#endif
2176

    
2177
    err |= __get_user(used_math, &sc->sc_used_math);
2178
    conditional_used_math(used_math);
2179

    
2180
    preempt_disable();
2181

    
2182
    if (used_math()) {
2183
        /* restore fpu context if we have used it before */
2184
        own_fpu();
2185
        err |= restore_fp_context(sc);
2186
    } else {
2187
        /* signal handler may have used FPU.  Give it up. */
2188
        lose_fpu();
2189
    }
2190

    
2191
    preempt_enable();
2192
#endif
2193
    return err;
2194
}
2195
/*
2196
 * Determine which stack to use..
2197
 */
2198
static inline void *
2199
get_sigframe(struct emulated_sigaction *ka, CPUState *regs, size_t frame_size)
2200
{
2201
    unsigned long sp;
2202

    
2203
    /* Default to using normal stack */
2204
    sp = regs->gpr[29][regs->current_tc];
2205

    
2206
    /*
2207
     * FPU emulator may have it's own trampoline active just
2208
     * above the user stack, 16-bytes before the next lowest
2209
     * 16 byte boundary.  Try to avoid trashing it.
2210
     */
2211
    sp -= 32;
2212

    
2213
    /* This is the X/Open sanctioned signal stack switching.  */
2214
    if ((ka->sa.sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
2215
        sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2216
    }
2217

    
2218
    return g2h((sp - frame_size) & ~7);
2219
}
2220

    
2221
static void setup_frame(int sig, struct emulated_sigaction * ka,
2222
                   target_sigset_t *set, CPUState *regs)
2223
{
2224
    struct sigframe *frame;
2225
    int i;
2226

    
2227
    frame = get_sigframe(ka, regs, sizeof(*frame));
2228
    if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
2229
        goto give_sigsegv;
2230

    
2231
    install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
2232

    
2233
    if(setup_sigcontext(regs, &frame->sf_sc))
2234
        goto give_sigsegv;
2235

    
2236
    for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2237
        if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
2238
            goto give_sigsegv;
2239
    }
2240

    
2241
    /*
2242
    * Arguments to signal handler:
2243
    *
2244
    *   a0 = signal number
2245
    *   a1 = 0 (should be cause)
2246
    *   a2 = pointer to struct sigcontext
2247
    *
2248
    * $25 and PC point to the signal handler, $29 points to the
2249
    * struct sigframe.
2250
    */
2251
    regs->gpr[ 4][regs->current_tc] = sig;
2252
    regs->gpr[ 5][regs->current_tc] = 0;
2253
    regs->gpr[ 6][regs->current_tc] = h2g(&frame->sf_sc);
2254
    regs->gpr[29][regs->current_tc] = h2g(frame);
2255
    regs->gpr[31][regs->current_tc] = h2g(frame->sf_code);
2256
    /* The original kernel code sets CP0_EPC to the handler
2257
    * since it returns to userland using eret
2258
    * we cannot do this here, and we must set PC directly */
2259
    regs->PC[regs->current_tc] = regs->gpr[25][regs->current_tc] = ka->sa._sa_handler;
2260
    return;
2261

    
2262
give_sigsegv:
2263
    force_sig(TARGET_SIGSEGV/*, current*/);
2264
    return;
2265
}
2266

    
2267
long do_sigreturn(CPUState *regs)
2268
{
2269
    struct sigframe *frame;
2270
    sigset_t blocked;
2271
    target_sigset_t target_set;
2272
    int i;
2273

    
2274
#if defined(DEBUG_SIGNAL)
2275
    fprintf(stderr, "do_sigreturn\n");
2276
#endif
2277
    frame = (struct sigframe *) regs->gpr[29][regs->current_tc];
2278
    if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
2279
           goto badframe;
2280

    
2281
    for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2282
           if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
2283
            goto badframe;
2284
    }
2285

    
2286
    target_to_host_sigset_internal(&blocked, &target_set);
2287
    sigprocmask(SIG_SETMASK, &blocked, NULL);
2288

    
2289
    if (restore_sigcontext(regs, &frame->sf_sc))
2290
           goto badframe;
2291

    
2292
#if 0
2293
    /*
2294
     * Don't let your children do this ...
2295
     */
2296
    __asm__ __volatile__(
2297
           "move\t$29, %0\n\t"
2298
           "j\tsyscall_exit"
2299
           :/* no outputs */
2300
           :"r" (&regs));
2301
    /* Unreached */
2302
#endif
2303

    
2304
    regs->PC[regs->current_tc] = regs->CP0_EPC;
2305
    /* I am not sure this is right, but it seems to work
2306
    * maybe a problem with nested signals ? */
2307
    regs->CP0_EPC = 0;
2308
    return 0;
2309

    
2310
badframe:
2311
    force_sig(TARGET_SIGSEGV/*, current*/);
2312
    return 0;
2313
}
2314

    
2315
static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
2316
                           target_siginfo_t *info,
2317
                           target_sigset_t *set, CPUState *env)
2318
{
2319
    fprintf(stderr, "setup_rt_frame: not implemented\n");
2320
}
2321

    
2322
long do_rt_sigreturn(CPUState *env)
2323
{
2324
    fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2325
    return -ENOSYS;
2326
}
2327

    
2328
#else
2329

    
2330
static void setup_frame(int sig, struct emulated_sigaction *ka,
2331
                        target_sigset_t *set, CPUState *env)
2332
{
2333
    fprintf(stderr, "setup_frame: not implemented\n");
2334
}
2335

    
2336
static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
2337
                           target_siginfo_t *info,
2338
                           target_sigset_t *set, CPUState *env)
2339
{
2340
    fprintf(stderr, "setup_rt_frame: not implemented\n");
2341
}
2342

    
2343
long do_sigreturn(CPUState *env)
2344
{
2345
    fprintf(stderr, "do_sigreturn: not implemented\n");
2346
    return -ENOSYS;
2347
}
2348

    
2349
long do_rt_sigreturn(CPUState *env)
2350
{
2351
    fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2352
    return -ENOSYS;
2353
}
2354

    
2355
#endif
2356

    
2357
void process_pending_signals(void *cpu_env)
2358
{
2359
    int sig;
2360
    abi_ulong handler;
2361
    sigset_t set, old_set;
2362
    target_sigset_t target_old_set;
2363
    struct emulated_sigaction *k;
2364
    struct sigqueue *q;
2365

    
2366
    if (!signal_pending)
2367
        return;
2368

    
2369
    k = sigact_table;
2370
    for(sig = 1; sig <= TARGET_NSIG; sig++) {
2371
        if (k->pending)
2372
            goto handle_signal;
2373
        k++;
2374
    }
2375
    /* if no signal is pending, just return */
2376
    signal_pending = 0;
2377
    return;
2378

    
2379
 handle_signal:
2380
#ifdef DEBUG_SIGNAL
2381
    fprintf(stderr, "qemu: process signal %d\n", sig);
2382
#endif
2383
    /* dequeue signal */
2384
    q = k->first;
2385
    k->first = q->next;
2386
    if (!k->first)
2387
        k->pending = 0;
2388

    
2389
    sig = gdb_handlesig (cpu_env, sig);
2390
    if (!sig) {
2391
        fprintf (stderr, "Lost signal\n");
2392
        abort();
2393
    }
2394

    
2395
    handler = k->sa._sa_handler;
2396
    if (handler == TARGET_SIG_DFL) {
2397
        /* default handler : ignore some signal. The other are fatal */
2398
        if (sig != TARGET_SIGCHLD &&
2399
            sig != TARGET_SIGURG &&
2400
            sig != TARGET_SIGWINCH) {
2401
            force_sig(sig);
2402
        }
2403
    } else if (handler == TARGET_SIG_IGN) {
2404
        /* ignore sig */
2405
    } else if (handler == TARGET_SIG_ERR) {
2406
        force_sig(sig);
2407
    } else {
2408
        /* compute the blocked signals during the handler execution */
2409
        target_to_host_sigset(&set, &k->sa.sa_mask);
2410
        /* SA_NODEFER indicates that the current signal should not be
2411
           blocked during the handler */
2412
        if (!(k->sa.sa_flags & TARGET_SA_NODEFER))
2413
            sigaddset(&set, target_to_host_signal(sig));
2414

    
2415
        /* block signals in the handler using Linux */
2416
        sigprocmask(SIG_BLOCK, &set, &old_set);
2417
        /* save the previous blocked signal state to restore it at the
2418
           end of the signal execution (see do_sigreturn) */
2419
        host_to_target_sigset_internal(&target_old_set, &old_set);
2420

    
2421
        /* if the CPU is in VM86 mode, we restore the 32 bit values */
2422
#if defined(TARGET_I386) && !defined(TARGET_X86_64)
2423
        {
2424
            CPUX86State *env = cpu_env;
2425
            if (env->eflags & VM_MASK)
2426
                save_v86_state(env);
2427
        }
2428
#endif
2429
        /* prepare the stack frame of the virtual CPU */
2430
        if (k->sa.sa_flags & TARGET_SA_SIGINFO)
2431
            setup_rt_frame(sig, k, &q->info, &target_old_set, cpu_env);
2432
        else
2433
            setup_frame(sig, k, &target_old_set, cpu_env);
2434
        if (k->sa.sa_flags & TARGET_SA_RESETHAND)
2435
            k->sa._sa_handler = TARGET_SIG_DFL;
2436
    }
2437
    if (q != &k->info)
2438
        free_sigqueue(q);
2439
}