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qemu-ga: add guest-sync-delimited
[qemu/kevin.git] / linux-user / signal.c
blobcefd2ff3ce6fcfefc00c14164700e9c4e662db6d
1 /*
2 * Emulation of Linux signals
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19 #include <stdlib.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include <stdarg.h>
23 #include <unistd.h>
24 #include <errno.h>
25 #include <assert.h>
26 #include <sys/ucontext.h>
27 #include <sys/resource.h>
28
29 #include "qemu.h"
30 #include "qemu-common.h"
31 #include "target_signal.h"
32
33 //#define DEBUG_SIGNAL
34
35 static struct target_sigaltstack target_sigaltstack_used = {
36 .ss_sp = 0,
37 .ss_size = 0,
38 .ss_flags = TARGET_SS_DISABLE,
39 };
40
41 static struct target_sigaction sigact_table[TARGET_NSIG];
42
43 static void host_signal_handler(int host_signum, siginfo_t *info,
44 void *puc);
45
46 static uint8_t host_to_target_signal_table[_NSIG] = {
47 [SIGHUP] = TARGET_SIGHUP,
48 [SIGINT] = TARGET_SIGINT,
49 [SIGQUIT] = TARGET_SIGQUIT,
50 [SIGILL] = TARGET_SIGILL,
51 [SIGTRAP] = TARGET_SIGTRAP,
52 [SIGABRT] = TARGET_SIGABRT,
53 /* [SIGIOT] = TARGET_SIGIOT,*/
54 [SIGBUS] = TARGET_SIGBUS,
55 [SIGFPE] = TARGET_SIGFPE,
56 [SIGKILL] = TARGET_SIGKILL,
57 [SIGUSR1] = TARGET_SIGUSR1,
58 [SIGSEGV] = TARGET_SIGSEGV,
59 [SIGUSR2] = TARGET_SIGUSR2,
60 [SIGPIPE] = TARGET_SIGPIPE,
61 [SIGALRM] = TARGET_SIGALRM,
62 [SIGTERM] = TARGET_SIGTERM,
63 #ifdef SIGSTKFLT
64 [SIGSTKFLT] = TARGET_SIGSTKFLT,
65 #endif
66 [SIGCHLD] = TARGET_SIGCHLD,
67 [SIGCONT] = TARGET_SIGCONT,
68 [SIGSTOP] = TARGET_SIGSTOP,
69 [SIGTSTP] = TARGET_SIGTSTP,
70 [SIGTTIN] = TARGET_SIGTTIN,
71 [SIGTTOU] = TARGET_SIGTTOU,
72 [SIGURG] = TARGET_SIGURG,
73 [SIGXCPU] = TARGET_SIGXCPU,
74 [SIGXFSZ] = TARGET_SIGXFSZ,
75 [SIGVTALRM] = TARGET_SIGVTALRM,
76 [SIGPROF] = TARGET_SIGPROF,
77 [SIGWINCH] = TARGET_SIGWINCH,
78 [SIGIO] = TARGET_SIGIO,
79 [SIGPWR] = TARGET_SIGPWR,
80 [SIGSYS] = TARGET_SIGSYS,
81 /* next signals stay the same */
82 /* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with
83 host libpthread signals. This assumes no one actually uses SIGRTMAX :-/
84 To fix this properly we need to do manual signal delivery multiplexed
85 over a single host signal. */
86 [__SIGRTMIN] = __SIGRTMAX,
87 [__SIGRTMAX] = __SIGRTMIN,
88 };
89 static uint8_t target_to_host_signal_table[_NSIG];
90
91 static inline int on_sig_stack(unsigned long sp)
92 {
93 return (sp - target_sigaltstack_used.ss_sp
94 < target_sigaltstack_used.ss_size);
95 }
96
97 static inline int sas_ss_flags(unsigned long sp)
98 {
99 return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE
100 : on_sig_stack(sp) ? SS_ONSTACK : 0);
101 }
102
103 int host_to_target_signal(int sig)
104 {
105 if (sig >= _NSIG)
106 return sig;
107 return host_to_target_signal_table[sig];
108 }
109
110 int target_to_host_signal(int sig)
111 {
112 if (sig >= _NSIG)
113 return sig;
114 return target_to_host_signal_table[sig];
115 }
116
117 static inline void target_sigemptyset(target_sigset_t *set)
118 {
119 memset(set, 0, sizeof(*set));
120 }
121
122 static inline void target_sigaddset(target_sigset_t *set, int signum)
123 {
124 signum--;
125 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
126 set->sig[signum / TARGET_NSIG_BPW] |= mask;
127 }
128
129 static inline int target_sigismember(const target_sigset_t *set, int signum)
130 {
131 signum--;
132 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
133 return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0);
134 }
135
136 static void host_to_target_sigset_internal(target_sigset_t *d,
137 const sigset_t *s)
138 {
139 int i;
140 target_sigemptyset(d);
141 for (i = 1; i <= TARGET_NSIG; i++) {
142 if (sigismember(s, i)) {
143 target_sigaddset(d, host_to_target_signal(i));
144 }
145 }
146 }
147
148 void host_to_target_sigset(target_sigset_t *d, const sigset_t *s)
149 {
150 target_sigset_t d1;
151 int i;
152
153 host_to_target_sigset_internal(&d1, s);
154 for(i = 0;i < TARGET_NSIG_WORDS; i++)
155 d->sig[i] = tswapal(d1.sig[i]);
156 }
157
158 static void target_to_host_sigset_internal(sigset_t *d,
159 const target_sigset_t *s)
160 {
161 int i;
162 sigemptyset(d);
163 for (i = 1; i <= TARGET_NSIG; i++) {
164 if (target_sigismember(s, i)) {
165 sigaddset(d, target_to_host_signal(i));
166 }
167 }
168 }
169
170 void target_to_host_sigset(sigset_t *d, const target_sigset_t *s)
171 {
172 target_sigset_t s1;
173 int i;
174
175 for(i = 0;i < TARGET_NSIG_WORDS; i++)
176 s1.sig[i] = tswapal(s->sig[i]);
177 target_to_host_sigset_internal(d, &s1);
178 }
179
180 void host_to_target_old_sigset(abi_ulong *old_sigset,
181 const sigset_t *sigset)
182 {
183 target_sigset_t d;
184 host_to_target_sigset(&d, sigset);
185 *old_sigset = d.sig[0];
186 }
187
188 void target_to_host_old_sigset(sigset_t *sigset,
189 const abi_ulong *old_sigset)
190 {
191 target_sigset_t d;
192 int i;
193
194 d.sig[0] = *old_sigset;
195 for(i = 1;i < TARGET_NSIG_WORDS; i++)
196 d.sig[i] = 0;
197 target_to_host_sigset(sigset, &d);
198 }
199
200 /* siginfo conversion */
201
202 static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
203 const siginfo_t *info)
204 {
205 int sig;
206 sig = host_to_target_signal(info->si_signo);
207 tinfo->si_signo = sig;
208 tinfo->si_errno = 0;
209 tinfo->si_code = info->si_code;
210 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
211 sig == SIGBUS || sig == SIGTRAP) {
212 /* should never come here, but who knows. The information for
213 the target is irrelevant */
214 tinfo->_sifields._sigfault._addr = 0;
215 } else if (sig == SIGIO) {
216 tinfo->_sifields._sigpoll._fd = info->si_fd;
217 } else if (sig >= TARGET_SIGRTMIN) {
218 tinfo->_sifields._rt._pid = info->si_pid;
219 tinfo->_sifields._rt._uid = info->si_uid;
220 /* XXX: potential problem if 64 bit */
221 tinfo->_sifields._rt._sigval.sival_ptr =
222 (abi_ulong)(unsigned long)info->si_value.sival_ptr;
223 }
224 }
225
226 static void tswap_siginfo(target_siginfo_t *tinfo,
227 const target_siginfo_t *info)
228 {
229 int sig;
230 sig = info->si_signo;
231 tinfo->si_signo = tswap32(sig);
232 tinfo->si_errno = tswap32(info->si_errno);
233 tinfo->si_code = tswap32(info->si_code);
234 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
235 sig == SIGBUS || sig == SIGTRAP) {
236 tinfo->_sifields._sigfault._addr =
237 tswapal(info->_sifields._sigfault._addr);
238 } else if (sig == SIGIO) {
239 tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
240 } else if (sig >= TARGET_SIGRTMIN) {
241 tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid);
242 tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid);
243 tinfo->_sifields._rt._sigval.sival_ptr =
244 tswapal(info->_sifields._rt._sigval.sival_ptr);
245 }
246 }
247
248
249 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info)
250 {
251 host_to_target_siginfo_noswap(tinfo, info);
252 tswap_siginfo(tinfo, tinfo);
253 }
254
255 /* XXX: we support only POSIX RT signals are used. */
256 /* XXX: find a solution for 64 bit (additional malloced data is needed) */
257 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo)
258 {
259 info->si_signo = tswap32(tinfo->si_signo);
260 info->si_errno = tswap32(tinfo->si_errno);
261 info->si_code = tswap32(tinfo->si_code);
262 info->si_pid = tswap32(tinfo->_sifields._rt._pid);
263 info->si_uid = tswap32(tinfo->_sifields._rt._uid);
264 info->si_value.sival_ptr =
265 (void *)(long)tswapal(tinfo->_sifields._rt._sigval.sival_ptr);
266 }
267
268 static int fatal_signal (int sig)
269 {
270 switch (sig) {
271 case TARGET_SIGCHLD:
272 case TARGET_SIGURG:
273 case TARGET_SIGWINCH:
274 /* Ignored by default. */
275 return 0;
276 case TARGET_SIGCONT:
277 case TARGET_SIGSTOP:
278 case TARGET_SIGTSTP:
279 case TARGET_SIGTTIN:
280 case TARGET_SIGTTOU:
281 /* Job control signals. */
282 return 0;
283 default:
284 return 1;
285 }
286 }
287
288 /* returns 1 if given signal should dump core if not handled */
289 static int core_dump_signal(int sig)
290 {
291 switch (sig) {
292 case TARGET_SIGABRT:
293 case TARGET_SIGFPE:
294 case TARGET_SIGILL:
295 case TARGET_SIGQUIT:
296 case TARGET_SIGSEGV:
297 case TARGET_SIGTRAP:
298 case TARGET_SIGBUS:
299 return (1);
300 default:
301 return (0);
302 }
303 }
304
305 void signal_init(void)
306 {
307 struct sigaction act;
308 struct sigaction oact;
309 int i, j;
310 int host_sig;
311
312 /* generate signal conversion tables */
313 for(i = 1; i < _NSIG; i++) {
314 if (host_to_target_signal_table[i] == 0)
315 host_to_target_signal_table[i] = i;
316 }
317 for(i = 1; i < _NSIG; i++) {
318 j = host_to_target_signal_table[i];
319 target_to_host_signal_table[j] = i;
320 }
321
322 /* set all host signal handlers. ALL signals are blocked during
323 the handlers to serialize them. */
324 memset(sigact_table, 0, sizeof(sigact_table));
325
326 sigfillset(&act.sa_mask);
327 act.sa_flags = SA_SIGINFO;
328 act.sa_sigaction = host_signal_handler;
329 for(i = 1; i <= TARGET_NSIG; i++) {
330 host_sig = target_to_host_signal(i);
331 sigaction(host_sig, NULL, &oact);
332 if (oact.sa_sigaction == (void *)SIG_IGN) {
333 sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
334 } else if (oact.sa_sigaction == (void *)SIG_DFL) {
335 sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
336 }
337 /* If there's already a handler installed then something has
338 gone horribly wrong, so don't even try to handle that case. */
339 /* Install some handlers for our own use. We need at least
340 SIGSEGV and SIGBUS, to detect exceptions. We can not just
341 trap all signals because it affects syscall interrupt
342 behavior. But do trap all default-fatal signals. */
343 if (fatal_signal (i))
344 sigaction(host_sig, &act, NULL);
345 }
346 }
347
348 /* signal queue handling */
349
350 static inline struct sigqueue *alloc_sigqueue(CPUState *env)
351 {
352 TaskState *ts = env->opaque;
353 struct sigqueue *q = ts->first_free;
354 if (!q)
355 return NULL;
356 ts->first_free = q->next;
357 return q;
358 }
359
360 static inline void free_sigqueue(CPUState *env, struct sigqueue *q)
361 {
362 TaskState *ts = env->opaque;
363 q->next = ts->first_free;
364 ts->first_free = q;
365 }
366
367 /* abort execution with signal */
368 static void QEMU_NORETURN force_sig(int target_sig)
369 {
370 TaskState *ts = (TaskState *)thread_env->opaque;
371 int host_sig, core_dumped = 0;
372 struct sigaction act;
373 host_sig = target_to_host_signal(target_sig);
374 gdb_signalled(thread_env, target_sig);
375
376 /* dump core if supported by target binary format */
377 if (core_dump_signal(target_sig) && (ts->bprm->core_dump != NULL)) {
378 stop_all_tasks();
379 core_dumped =
380 ((*ts->bprm->core_dump)(target_sig, thread_env) == 0);
381 }
382 if (core_dumped) {
383 /* we already dumped the core of target process, we don't want
384 * a coredump of qemu itself */
385 struct rlimit nodump;
386 getrlimit(RLIMIT_CORE, &nodump);
387 nodump.rlim_cur=0;
388 setrlimit(RLIMIT_CORE, &nodump);
389 (void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n",
390 target_sig, strsignal(host_sig), "core dumped" );
391 }
392
393 /* The proper exit code for dying from an uncaught signal is
394 * -<signal>. The kernel doesn't allow exit() or _exit() to pass
395 * a negative value. To get the proper exit code we need to
396 * actually die from an uncaught signal. Here the default signal
397 * handler is installed, we send ourself a signal and we wait for
398 * it to arrive. */
399 sigfillset(&act.sa_mask);
400 act.sa_handler = SIG_DFL;
401 sigaction(host_sig, &act, NULL);
402
403 /* For some reason raise(host_sig) doesn't send the signal when
404 * statically linked on x86-64. */
405 kill(getpid(), host_sig);
406
407 /* Make sure the signal isn't masked (just reuse the mask inside
408 of act) */
409 sigdelset(&act.sa_mask, host_sig);
410 sigsuspend(&act.sa_mask);
411
412 /* unreachable */
413 abort();
414 }
415
416 /* queue a signal so that it will be send to the virtual CPU as soon
417 as possible */
418 int queue_signal(CPUState *env, int sig, target_siginfo_t *info)
419 {
420 TaskState *ts = env->opaque;
421 struct emulated_sigtable *k;
422 struct sigqueue *q, **pq;
423 abi_ulong handler;
424 int queue;
425
426 #if defined(DEBUG_SIGNAL)
427 fprintf(stderr, "queue_signal: sig=%d\n",
428 sig);
429 #endif
430 k = &ts->sigtab[sig - 1];
431 queue = gdb_queuesig ();
432 handler = sigact_table[sig - 1]._sa_handler;
433 if (!queue && handler == TARGET_SIG_DFL) {
434 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
435 kill(getpid(),SIGSTOP);
436 return 0;
437 } else
438 /* default handler : ignore some signal. The other are fatal */
439 if (sig != TARGET_SIGCHLD &&
440 sig != TARGET_SIGURG &&
441 sig != TARGET_SIGWINCH &&
442 sig != TARGET_SIGCONT) {
443 force_sig(sig);
444 } else {
445 return 0; /* indicate ignored */
446 }
447 } else if (!queue && handler == TARGET_SIG_IGN) {
448 /* ignore signal */
449 return 0;
450 } else if (!queue && handler == TARGET_SIG_ERR) {
451 force_sig(sig);
452 } else {
453 pq = &k->first;
454 if (sig < TARGET_SIGRTMIN) {
455 /* if non real time signal, we queue exactly one signal */
456 if (!k->pending)
457 q = &k->info;
458 else
459 return 0;
460 } else {
461 if (!k->pending) {
462 /* first signal */
463 q = &k->info;
464 } else {
465 q = alloc_sigqueue(env);
466 if (!q)
467 return -EAGAIN;
468 while (*pq != NULL)
469 pq = &(*pq)->next;
470 }
471 }
472 *pq = q;
473 q->info = *info;
474 q->next = NULL;
475 k->pending = 1;
476 /* signal that a new signal is pending */
477 ts->signal_pending = 1;
478 return 1; /* indicates that the signal was queued */
479 }
480 }
481
482 static void host_signal_handler(int host_signum, siginfo_t *info,
483 void *puc)
484 {
485 int sig;
486 target_siginfo_t tinfo;
487
488 /* the CPU emulator uses some host signals to detect exceptions,
489 we forward to it some signals */
490 if ((host_signum == SIGSEGV || host_signum == SIGBUS)
491 && info->si_code > 0) {
492 if (cpu_signal_handler(host_signum, info, puc))
493 return;
494 }
495
496 /* get target signal number */
497 sig = host_to_target_signal(host_signum);
498 if (sig < 1 || sig > TARGET_NSIG)
499 return;
500 #if defined(DEBUG_SIGNAL)
501 fprintf(stderr, "qemu: got signal %d\n", sig);
502 #endif
503 host_to_target_siginfo_noswap(&tinfo, info);
504 if (queue_signal(thread_env, sig, &tinfo) == 1) {
505 /* interrupt the virtual CPU as soon as possible */
506 cpu_exit(thread_env);
507 }
508 }
509
510 /* do_sigaltstack() returns target values and errnos. */
511 /* compare linux/kernel/signal.c:do_sigaltstack() */
512 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
513 {
514 int ret;
515 struct target_sigaltstack oss;
516
517 /* XXX: test errors */
518 if(uoss_addr)
519 {
520 __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
521 __put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
522 __put_user(sas_ss_flags(sp), &oss.ss_flags);
523 }
524
525 if(uss_addr)
526 {
527 struct target_sigaltstack *uss;
528 struct target_sigaltstack ss;
529
530 ret = -TARGET_EFAULT;
531 if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)
532 || __get_user(ss.ss_sp, &uss->ss_sp)
533 || __get_user(ss.ss_size, &uss->ss_size)
534 || __get_user(ss.ss_flags, &uss->ss_flags))
535 goto out;
536 unlock_user_struct(uss, uss_addr, 0);
537
538 ret = -TARGET_EPERM;
539 if (on_sig_stack(sp))
540 goto out;
541
542 ret = -TARGET_EINVAL;
543 if (ss.ss_flags != TARGET_SS_DISABLE
544 && ss.ss_flags != TARGET_SS_ONSTACK
545 && ss.ss_flags != 0)
546 goto out;
547
548 if (ss.ss_flags == TARGET_SS_DISABLE) {
549 ss.ss_size = 0;
550 ss.ss_sp = 0;
551 } else {
552 ret = -TARGET_ENOMEM;
553 if (ss.ss_size < MINSIGSTKSZ)
554 goto out;
555 }
556
557 target_sigaltstack_used.ss_sp = ss.ss_sp;
558 target_sigaltstack_used.ss_size = ss.ss_size;
559 }
560
561 if (uoss_addr) {
562 ret = -TARGET_EFAULT;
563 if (copy_to_user(uoss_addr, &oss, sizeof(oss)))
564 goto out;
565 }
566
567 ret = 0;
568 out:
569 return ret;
570 }
571
572 /* do_sigaction() return host values and errnos */
573 int do_sigaction(int sig, const struct target_sigaction *act,
574 struct target_sigaction *oact)
575 {
576 struct target_sigaction *k;
577 struct sigaction act1;
578 int host_sig;
579 int ret = 0;
580
581 if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP)
582 return -EINVAL;
583 k = &sigact_table[sig - 1];
584 #if defined(DEBUG_SIGNAL)
585 fprintf(stderr, "sigaction sig=%d act=0x%p, oact=0x%p\n",
586 sig, act, oact);
587 #endif
588 if (oact) {
589 oact->_sa_handler = tswapal(k->_sa_handler);
590 #if defined(TARGET_MIPS) || defined (TARGET_ALPHA)
591 oact->sa_flags = bswap32(k->sa_flags);
592 #else
593 oact->sa_flags = tswapal(k->sa_flags);
594 #endif
595 #if !defined(TARGET_MIPS)
596 oact->sa_restorer = tswapal(k->sa_restorer);
597 #endif
598 oact->sa_mask = k->sa_mask;
599 }
600 if (act) {
601 /* FIXME: This is not threadsafe. */
602 k->_sa_handler = tswapal(act->_sa_handler);
603 #if defined(TARGET_MIPS) || defined (TARGET_ALPHA)
604 k->sa_flags = bswap32(act->sa_flags);
605 #else
606 k->sa_flags = tswapal(act->sa_flags);
607 #endif
608 #if !defined(TARGET_MIPS)
609 k->sa_restorer = tswapal(act->sa_restorer);
610 #endif
611 k->sa_mask = act->sa_mask;
612
613 /* we update the host linux signal state */
614 host_sig = target_to_host_signal(sig);
615 if (host_sig != SIGSEGV && host_sig != SIGBUS) {
616 sigfillset(&act1.sa_mask);
617 act1.sa_flags = SA_SIGINFO;
618 if (k->sa_flags & TARGET_SA_RESTART)
619 act1.sa_flags |= SA_RESTART;
620 /* NOTE: it is important to update the host kernel signal
621 ignore state to avoid getting unexpected interrupted
622 syscalls */
623 if (k->_sa_handler == TARGET_SIG_IGN) {
624 act1.sa_sigaction = (void *)SIG_IGN;
625 } else if (k->_sa_handler == TARGET_SIG_DFL) {
626 if (fatal_signal (sig))
627 act1.sa_sigaction = host_signal_handler;
628 else
629 act1.sa_sigaction = (void *)SIG_DFL;
630 } else {
631 act1.sa_sigaction = host_signal_handler;
632 }
633 ret = sigaction(host_sig, &act1, NULL);
634 }
635 }
636 return ret;
637 }
638
639 static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
640 const target_siginfo_t *info)
641 {
642 tswap_siginfo(tinfo, info);
643 return 0;
644 }
645
646 static inline int current_exec_domain_sig(int sig)
647 {
648 return /* current->exec_domain && current->exec_domain->signal_invmap
649 && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
650 }
651
652 #if defined(TARGET_I386) && TARGET_ABI_BITS == 32
653
654 /* from the Linux kernel */
655
656 struct target_fpreg {
657 uint16_t significand[4];
658 uint16_t exponent;
659 };
660
661 struct target_fpxreg {
662 uint16_t significand[4];
663 uint16_t exponent;
664 uint16_t padding[3];
665 };
666
667 struct target_xmmreg {
668 abi_ulong element[4];
669 };
670
671 struct target_fpstate {
672 /* Regular FPU environment */
673 abi_ulong cw;
674 abi_ulong sw;
675 abi_ulong tag;
676 abi_ulong ipoff;
677 abi_ulong cssel;
678 abi_ulong dataoff;
679 abi_ulong datasel;
680 struct target_fpreg _st[8];
681 uint16_t status;
682 uint16_t magic; /* 0xffff = regular FPU data only */
683
684 /* FXSR FPU environment */
685 abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
686 abi_ulong mxcsr;
687 abi_ulong reserved;
688 struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
689 struct target_xmmreg _xmm[8];
690 abi_ulong padding[56];
691 };
692
693 #define X86_FXSR_MAGIC 0x0000
694
695 struct target_sigcontext {
696 uint16_t gs, __gsh;
697 uint16_t fs, __fsh;
698 uint16_t es, __esh;
699 uint16_t ds, __dsh;
700 abi_ulong edi;
701 abi_ulong esi;
702 abi_ulong ebp;
703 abi_ulong esp;
704 abi_ulong ebx;
705 abi_ulong edx;
706 abi_ulong ecx;
707 abi_ulong eax;
708 abi_ulong trapno;
709 abi_ulong err;
710 abi_ulong eip;
711 uint16_t cs, __csh;
712 abi_ulong eflags;
713 abi_ulong esp_at_signal;
714 uint16_t ss, __ssh;
715 abi_ulong fpstate; /* pointer */
716 abi_ulong oldmask;
717 abi_ulong cr2;
718 };
719
720 struct target_ucontext {
721 abi_ulong tuc_flags;
722 abi_ulong tuc_link;
723 target_stack_t tuc_stack;
724 struct target_sigcontext tuc_mcontext;
725 target_sigset_t tuc_sigmask; /* mask last for extensibility */
726 };
727
728 struct sigframe
729 {
730 abi_ulong pretcode;
731 int sig;
732 struct target_sigcontext sc;
733 struct target_fpstate fpstate;
734 abi_ulong extramask[TARGET_NSIG_WORDS-1];
735 char retcode[8];
736 };
737
738 struct rt_sigframe
739 {
740 abi_ulong pretcode;
741 int sig;
742 abi_ulong pinfo;
743 abi_ulong puc;
744 struct target_siginfo info;
745 struct target_ucontext uc;
746 struct target_fpstate fpstate;
747 char retcode[8];
748 };
749
750 /*
751 * Set up a signal frame.
752 */
753
754 /* XXX: save x87 state */
755 static int
756 setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
757 CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr)
758 {
759 int err = 0;
760 uint16_t magic;
761
762 /* already locked in setup_frame() */
763 err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
764 err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
765 err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
766 err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
767 err |= __put_user(env->regs[R_EDI], &sc->edi);
768 err |= __put_user(env->regs[R_ESI], &sc->esi);
769 err |= __put_user(env->regs[R_EBP], &sc->ebp);
770 err |= __put_user(env->regs[R_ESP], &sc->esp);
771 err |= __put_user(env->regs[R_EBX], &sc->ebx);
772 err |= __put_user(env->regs[R_EDX], &sc->edx);
773 err |= __put_user(env->regs[R_ECX], &sc->ecx);
774 err |= __put_user(env->regs[R_EAX], &sc->eax);
775 err |= __put_user(env->exception_index, &sc->trapno);
776 err |= __put_user(env->error_code, &sc->err);
777 err |= __put_user(env->eip, &sc->eip);
778 err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
779 err |= __put_user(env->eflags, &sc->eflags);
780 err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
781 err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
782
783 cpu_x86_fsave(env, fpstate_addr, 1);
784 fpstate->status = fpstate->sw;
785 magic = 0xffff;
786 err |= __put_user(magic, &fpstate->magic);
787 err |= __put_user(fpstate_addr, &sc->fpstate);
788
789 /* non-iBCS2 extensions.. */
790 err |= __put_user(mask, &sc->oldmask);
791 err |= __put_user(env->cr[2], &sc->cr2);
792 return err;
793 }
794
795 /*
796 * Determine which stack to use..
797 */
798
799 static inline abi_ulong
800 get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
801 {
802 unsigned long esp;
803
804 /* Default to using normal stack */
805 esp = env->regs[R_ESP];
806 /* This is the X/Open sanctioned signal stack switching. */
807 if (ka->sa_flags & TARGET_SA_ONSTACK) {
808 if (sas_ss_flags(esp) == 0)
809 esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
810 }
811
812 /* This is the legacy signal stack switching. */
813 else
814 if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
815 !(ka->sa_flags & TARGET_SA_RESTORER) &&
816 ka->sa_restorer) {
817 esp = (unsigned long) ka->sa_restorer;
818 }
819 return (esp - frame_size) & -8ul;
820 }
821
822 /* compare linux/arch/i386/kernel/signal.c:setup_frame() */
823 static void setup_frame(int sig, struct target_sigaction *ka,
824 target_sigset_t *set, CPUX86State *env)
825 {
826 abi_ulong frame_addr;
827 struct sigframe *frame;
828 int i, err = 0;
829
830 frame_addr = get_sigframe(ka, env, sizeof(*frame));
831
832 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
833 goto give_sigsegv;
834
835 err |= __put_user(current_exec_domain_sig(sig),
836 &frame->sig);
837 if (err)
838 goto give_sigsegv;
839
840 setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
841 frame_addr + offsetof(struct sigframe, fpstate));
842 if (err)
843 goto give_sigsegv;
844
845 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
846 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
847 goto give_sigsegv;
848 }
849
850 /* Set up to return from userspace. If provided, use a stub
851 already in userspace. */
852 if (ka->sa_flags & TARGET_SA_RESTORER) {
853 err |= __put_user(ka->sa_restorer, &frame->pretcode);
854 } else {
855 uint16_t val16;
856 abi_ulong retcode_addr;
857 retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
858 err |= __put_user(retcode_addr, &frame->pretcode);
859 /* This is popl %eax ; movl $,%eax ; int $0x80 */
860 val16 = 0xb858;
861 err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
862 err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
863 val16 = 0x80cd;
864 err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
865 }
866
867 if (err)
868 goto give_sigsegv;
869
870 /* Set up registers for signal handler */
871 env->regs[R_ESP] = frame_addr;
872 env->eip = ka->_sa_handler;
873
874 cpu_x86_load_seg(env, R_DS, __USER_DS);
875 cpu_x86_load_seg(env, R_ES, __USER_DS);
876 cpu_x86_load_seg(env, R_SS, __USER_DS);
877 cpu_x86_load_seg(env, R_CS, __USER_CS);
878 env->eflags &= ~TF_MASK;
879
880 unlock_user_struct(frame, frame_addr, 1);
881
882 return;
883
884 give_sigsegv:
885 unlock_user_struct(frame, frame_addr, 1);
886 if (sig == TARGET_SIGSEGV)
887 ka->_sa_handler = TARGET_SIG_DFL;
888 force_sig(TARGET_SIGSEGV /* , current */);
889 }
890
891 /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
892 static void setup_rt_frame(int sig, struct target_sigaction *ka,
893 target_siginfo_t *info,
894 target_sigset_t *set, CPUX86State *env)
895 {
896 abi_ulong frame_addr, addr;
897 struct rt_sigframe *frame;
898 int i, err = 0;
899
900 frame_addr = get_sigframe(ka, env, sizeof(*frame));
901
902 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
903 goto give_sigsegv;
904
905 err |= __put_user(current_exec_domain_sig(sig),
906 &frame->sig);
907 addr = frame_addr + offsetof(struct rt_sigframe, info);
908 err |= __put_user(addr, &frame->pinfo);
909 addr = frame_addr + offsetof(struct rt_sigframe, uc);
910 err |= __put_user(addr, &frame->puc);
911 err |= copy_siginfo_to_user(&frame->info, info);
912 if (err)
913 goto give_sigsegv;
914
915 /* Create the ucontext. */
916 err |= __put_user(0, &frame->uc.tuc_flags);
917 err |= __put_user(0, &frame->uc.tuc_link);
918 err |= __put_user(target_sigaltstack_used.ss_sp,
919 &frame->uc.tuc_stack.ss_sp);
920 err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
921 &frame->uc.tuc_stack.ss_flags);
922 err |= __put_user(target_sigaltstack_used.ss_size,
923 &frame->uc.tuc_stack.ss_size);
924 err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
925 env, set->sig[0],
926 frame_addr + offsetof(struct rt_sigframe, fpstate));
927 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
928 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
929 goto give_sigsegv;
930 }
931
932 /* Set up to return from userspace. If provided, use a stub
933 already in userspace. */
934 if (ka->sa_flags & TARGET_SA_RESTORER) {
935 err |= __put_user(ka->sa_restorer, &frame->pretcode);
936 } else {
937 uint16_t val16;
938 addr = frame_addr + offsetof(struct rt_sigframe, retcode);
939 err |= __put_user(addr, &frame->pretcode);
940 /* This is movl $,%eax ; int $0x80 */
941 err |= __put_user(0xb8, (char *)(frame->retcode+0));
942 err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
943 val16 = 0x80cd;
944 err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
945 }
946
947 if (err)
948 goto give_sigsegv;
949
950 /* Set up registers for signal handler */
951 env->regs[R_ESP] = frame_addr;
952 env->eip = ka->_sa_handler;
953
954 cpu_x86_load_seg(env, R_DS, __USER_DS);
955 cpu_x86_load_seg(env, R_ES, __USER_DS);
956 cpu_x86_load_seg(env, R_SS, __USER_DS);
957 cpu_x86_load_seg(env, R_CS, __USER_CS);
958 env->eflags &= ~TF_MASK;
959
960 unlock_user_struct(frame, frame_addr, 1);
961
962 return;
963
964 give_sigsegv:
965 unlock_user_struct(frame, frame_addr, 1);
966 if (sig == TARGET_SIGSEGV)
967 ka->_sa_handler = TARGET_SIG_DFL;
968 force_sig(TARGET_SIGSEGV /* , current */);
969 }
970
971 static int
972 restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
973 {
974 unsigned int err = 0;
975 abi_ulong fpstate_addr;
976 unsigned int tmpflags;
977
978 cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
979 cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
980 cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
981 cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
982
983 env->regs[R_EDI] = tswapl(sc->edi);
984 env->regs[R_ESI] = tswapl(sc->esi);
985 env->regs[R_EBP] = tswapl(sc->ebp);
986 env->regs[R_ESP] = tswapl(sc->esp);
987 env->regs[R_EBX] = tswapl(sc->ebx);
988 env->regs[R_EDX] = tswapl(sc->edx);
989 env->regs[R_ECX] = tswapl(sc->ecx);
990 env->eip = tswapl(sc->eip);
991
992 cpu_x86_load_seg(env, R_CS, lduw_p(&sc->cs) | 3);
993 cpu_x86_load_seg(env, R_SS, lduw_p(&sc->ss) | 3);
994
995 tmpflags = tswapl(sc->eflags);
996 env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
997 // regs->orig_eax = -1; /* disable syscall checks */
998
999 fpstate_addr = tswapl(sc->fpstate);
1000 if (fpstate_addr != 0) {
1001 if (!access_ok(VERIFY_READ, fpstate_addr,
1002 sizeof(struct target_fpstate)))
1003 goto badframe;
1004 cpu_x86_frstor(env, fpstate_addr, 1);
1005 }
1006
1007 *peax = tswapl(sc->eax);
1008 return err;
1009 badframe:
1010 return 1;
1011 }
1012
1013 long do_sigreturn(CPUX86State *env)
1014 {
1015 struct sigframe *frame;
1016 abi_ulong frame_addr = env->regs[R_ESP] - 8;
1017 target_sigset_t target_set;
1018 sigset_t set;
1019 int eax, i;
1020
1021 #if defined(DEBUG_SIGNAL)
1022 fprintf(stderr, "do_sigreturn\n");
1023 #endif
1024 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1025 goto badframe;
1026 /* set blocked signals */
1027 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
1028 goto badframe;
1029 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1030 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
1031 goto badframe;
1032 }
1033
1034 target_to_host_sigset_internal(&set, &target_set);
1035 sigprocmask(SIG_SETMASK, &set, NULL);
1036
1037 /* restore registers */
1038 if (restore_sigcontext(env, &frame->sc, &eax))
1039 goto badframe;
1040 unlock_user_struct(frame, frame_addr, 0);
1041 return eax;
1042
1043 badframe:
1044 unlock_user_struct(frame, frame_addr, 0);
1045 force_sig(TARGET_SIGSEGV);
1046 return 0;
1047 }
1048
1049 long do_rt_sigreturn(CPUX86State *env)
1050 {
1051 abi_ulong frame_addr;
1052 struct rt_sigframe *frame;
1053 sigset_t set;
1054 int eax;
1055
1056 frame_addr = env->regs[R_ESP] - 4;
1057 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1058 goto badframe;
1059 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
1060 sigprocmask(SIG_SETMASK, &set, NULL);
1061
1062 if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
1063 goto badframe;
1064
1065 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
1066 get_sp_from_cpustate(env)) == -EFAULT)
1067 goto badframe;
1068
1069 unlock_user_struct(frame, frame_addr, 0);
1070 return eax;
1071
1072 badframe:
1073 unlock_user_struct(frame, frame_addr, 0);
1074 force_sig(TARGET_SIGSEGV);
1075 return 0;
1076 }
1077
1078 #elif defined(TARGET_ARM)
1079
1080 struct target_sigcontext {
1081 abi_ulong trap_no;
1082 abi_ulong error_code;
1083 abi_ulong oldmask;
1084 abi_ulong arm_r0;
1085 abi_ulong arm_r1;
1086 abi_ulong arm_r2;
1087 abi_ulong arm_r3;
1088 abi_ulong arm_r4;
1089 abi_ulong arm_r5;
1090 abi_ulong arm_r6;
1091 abi_ulong arm_r7;
1092 abi_ulong arm_r8;
1093 abi_ulong arm_r9;
1094 abi_ulong arm_r10;
1095 abi_ulong arm_fp;
1096 abi_ulong arm_ip;
1097 abi_ulong arm_sp;
1098 abi_ulong arm_lr;
1099 abi_ulong arm_pc;
1100 abi_ulong arm_cpsr;
1101 abi_ulong fault_address;
1102 };
1103
1104 struct target_ucontext_v1 {
1105 abi_ulong tuc_flags;
1106 abi_ulong tuc_link;
1107 target_stack_t tuc_stack;
1108 struct target_sigcontext tuc_mcontext;
1109 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1110 };
1111
1112 struct target_ucontext_v2 {
1113 abi_ulong tuc_flags;
1114 abi_ulong tuc_link;
1115 target_stack_t tuc_stack;
1116 struct target_sigcontext tuc_mcontext;
1117 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1118 char __unused[128 - sizeof(target_sigset_t)];
1119 abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
1120 };
1121
1122 struct target_user_vfp {
1123 uint64_t fpregs[32];
1124 abi_ulong fpscr;
1125 };
1126
1127 struct target_user_vfp_exc {
1128 abi_ulong fpexc;
1129 abi_ulong fpinst;
1130 abi_ulong fpinst2;
1131 };
1132
1133 struct target_vfp_sigframe {
1134 abi_ulong magic;
1135 abi_ulong size;
1136 struct target_user_vfp ufp;
1137 struct target_user_vfp_exc ufp_exc;
1138 } __attribute__((__aligned__(8)));
1139
1140 struct target_iwmmxt_sigframe {
1141 abi_ulong magic;
1142 abi_ulong size;
1143 uint64_t regs[16];
1144 /* Note that not all the coprocessor control registers are stored here */
1145 uint32_t wcssf;
1146 uint32_t wcasf;
1147 uint32_t wcgr0;
1148 uint32_t wcgr1;
1149 uint32_t wcgr2;
1150 uint32_t wcgr3;
1151 } __attribute__((__aligned__(8)));
1152
1153 #define TARGET_VFP_MAGIC 0x56465001
1154 #define TARGET_IWMMXT_MAGIC 0x12ef842a
1155
1156 struct sigframe_v1
1157 {
1158 struct target_sigcontext sc;
1159 abi_ulong extramask[TARGET_NSIG_WORDS-1];
1160 abi_ulong retcode;
1161 };
1162
1163 struct sigframe_v2
1164 {
1165 struct target_ucontext_v2 uc;
1166 abi_ulong retcode;
1167 };
1168
1169 struct rt_sigframe_v1
1170 {
1171 abi_ulong pinfo;
1172 abi_ulong puc;
1173 struct target_siginfo info;
1174 struct target_ucontext_v1 uc;
1175 abi_ulong retcode;
1176 };
1177
1178 struct rt_sigframe_v2
1179 {
1180 struct target_siginfo info;
1181 struct target_ucontext_v2 uc;
1182 abi_ulong retcode;
1183 };
1184
1185 #define TARGET_CONFIG_CPU_32 1
1186
1187 /*
1188 * For ARM syscalls, we encode the syscall number into the instruction.
1189 */
1190 #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
1191 #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
1192
1193 /*
1194 * For Thumb syscalls, we pass the syscall number via r7. We therefore
1195 * need two 16-bit instructions.
1196 */
1197 #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
1198 #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
1199
1200 static const abi_ulong retcodes[4] = {
1201 SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
1202 SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
1203 };
1204
1205
1206 #define __get_user_error(x,p,e) __get_user(x, p)
1207
1208 static inline int valid_user_regs(CPUState *regs)
1209 {
1210 return 1;
1211 }
1212
1213 static void
1214 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1215 CPUState *env, abi_ulong mask)
1216 {
1217 __put_user(env->regs[0], &sc->arm_r0);
1218 __put_user(env->regs[1], &sc->arm_r1);
1219 __put_user(env->regs[2], &sc->arm_r2);
1220 __put_user(env->regs[3], &sc->arm_r3);
1221 __put_user(env->regs[4], &sc->arm_r4);
1222 __put_user(env->regs[5], &sc->arm_r5);
1223 __put_user(env->regs[6], &sc->arm_r6);
1224 __put_user(env->regs[7], &sc->arm_r7);
1225 __put_user(env->regs[8], &sc->arm_r8);
1226 __put_user(env->regs[9], &sc->arm_r9);
1227 __put_user(env->regs[10], &sc->arm_r10);
1228 __put_user(env->regs[11], &sc->arm_fp);
1229 __put_user(env->regs[12], &sc->arm_ip);
1230 __put_user(env->regs[13], &sc->arm_sp);
1231 __put_user(env->regs[14], &sc->arm_lr);
1232 __put_user(env->regs[15], &sc->arm_pc);
1233 #ifdef TARGET_CONFIG_CPU_32
1234 __put_user(cpsr_read(env), &sc->arm_cpsr);
1235 #endif
1236
1237 __put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
1238 __put_user(/* current->thread.error_code */ 0, &sc->error_code);
1239 __put_user(/* current->thread.address */ 0, &sc->fault_address);
1240 __put_user(mask, &sc->oldmask);
1241 }
1242
1243 static inline abi_ulong
1244 get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize)
1245 {
1246 unsigned long sp = regs->regs[13];
1247
1248 /*
1249 * This is the X/Open sanctioned signal stack switching.
1250 */
1251 if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
1252 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1253 /*
1254 * ATPCS B01 mandates 8-byte alignment
1255 */
1256 return (sp - framesize) & ~7;
1257 }
1258
1259 static int
1260 setup_return(CPUState *env, struct target_sigaction *ka,
1261 abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
1262 {
1263 abi_ulong handler = ka->_sa_handler;
1264 abi_ulong retcode;
1265 int thumb = handler & 1;
1266 uint32_t cpsr = cpsr_read(env);
1267
1268 cpsr &= ~CPSR_IT;
1269 if (thumb) {
1270 cpsr |= CPSR_T;
1271 } else {
1272 cpsr &= ~CPSR_T;
1273 }
1274
1275 if (ka->sa_flags & TARGET_SA_RESTORER) {
1276 retcode = ka->sa_restorer;
1277 } else {
1278 unsigned int idx = thumb;
1279
1280 if (ka->sa_flags & TARGET_SA_SIGINFO)
1281 idx += 2;
1282
1283 if (__put_user(retcodes[idx], rc))
1284 return 1;
1285
1286 retcode = rc_addr + thumb;
1287 }
1288
1289 env->regs[0] = usig;
1290 env->regs[13] = frame_addr;
1291 env->regs[14] = retcode;
1292 env->regs[15] = handler & (thumb ? ~1 : ~3);
1293 cpsr_write(env, cpsr, 0xffffffff);
1294
1295 return 0;
1296 }
1297
1298 static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUState *env)
1299 {
1300 int i;
1301 struct target_vfp_sigframe *vfpframe;
1302 vfpframe = (struct target_vfp_sigframe *)regspace;
1303 __put_user(TARGET_VFP_MAGIC, &vfpframe->magic);
1304 __put_user(sizeof(*vfpframe), &vfpframe->size);
1305 for (i = 0; i < 32; i++) {
1306 __put_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]);
1307 }
1308 __put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr);
1309 __put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc);
1310 __put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
1311 __put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
1312 return (abi_ulong*)(vfpframe+1);
1313 }
1314
1315 static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace, CPUState *env)
1316 {
1317 int i;
1318 struct target_iwmmxt_sigframe *iwmmxtframe;
1319 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
1320 __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic);
1321 __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size);
1322 for (i = 0; i < 16; i++) {
1323 __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
1324 }
1325 __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
1326 __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
1327 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
1328 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
1329 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
1330 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
1331 return (abi_ulong*)(iwmmxtframe+1);
1332 }
1333
1334 static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
1335 target_sigset_t *set, CPUState *env)
1336 {
1337 struct target_sigaltstack stack;
1338 int i;
1339 abi_ulong *regspace;
1340
1341 /* Clear all the bits of the ucontext we don't use. */
1342 memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
1343
1344 memset(&stack, 0, sizeof(stack));
1345 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1346 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1347 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1348 memcpy(&uc->tuc_stack, &stack, sizeof(stack));
1349
1350 setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
1351 /* Save coprocessor signal frame. */
1352 regspace = uc->tuc_regspace;
1353 if (arm_feature(env, ARM_FEATURE_VFP)) {
1354 regspace = setup_sigframe_v2_vfp(regspace, env);
1355 }
1356 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
1357 regspace = setup_sigframe_v2_iwmmxt(regspace, env);
1358 }
1359
1360 /* Write terminating magic word */
1361 __put_user(0, regspace);
1362
1363 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1364 __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
1365 }
1366 }
1367
1368 /* compare linux/arch/arm/kernel/signal.c:setup_frame() */
1369 static void setup_frame_v1(int usig, struct target_sigaction *ka,
1370 target_sigset_t *set, CPUState *regs)
1371 {
1372 struct sigframe_v1 *frame;
1373 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1374 int i;
1375
1376 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1377 return;
1378
1379 setup_sigcontext(&frame->sc, regs, set->sig[0]);
1380
1381 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1382 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
1383 goto end;
1384 }
1385
1386 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1387 frame_addr + offsetof(struct sigframe_v1, retcode));
1388
1389 end:
1390 unlock_user_struct(frame, frame_addr, 1);
1391 }
1392
1393 static void setup_frame_v2(int usig, struct target_sigaction *ka,
1394 target_sigset_t *set, CPUState *regs)
1395 {
1396 struct sigframe_v2 *frame;
1397 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1398
1399 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1400 return;
1401
1402 setup_sigframe_v2(&frame->uc, set, regs);
1403
1404 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1405 frame_addr + offsetof(struct sigframe_v2, retcode));
1406
1407 unlock_user_struct(frame, frame_addr, 1);
1408 }
1409
1410 static void setup_frame(int usig, struct target_sigaction *ka,
1411 target_sigset_t *set, CPUState *regs)
1412 {
1413 if (get_osversion() >= 0x020612) {
1414 setup_frame_v2(usig, ka, set, regs);
1415 } else {
1416 setup_frame_v1(usig, ka, set, regs);
1417 }
1418 }
1419
1420 /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
1421 static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
1422 target_siginfo_t *info,
1423 target_sigset_t *set, CPUState *env)
1424 {
1425 struct rt_sigframe_v1 *frame;
1426 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1427 struct target_sigaltstack stack;
1428 int i;
1429 abi_ulong info_addr, uc_addr;
1430
1431 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1432 return /* 1 */;
1433
1434 info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
1435 __put_user(info_addr, &frame->pinfo);
1436 uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
1437 __put_user(uc_addr, &frame->puc);
1438 copy_siginfo_to_user(&frame->info, info);
1439
1440 /* Clear all the bits of the ucontext we don't use. */
1441 memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
1442
1443 memset(&stack, 0, sizeof(stack));
1444 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1445 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1446 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1447 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
1448
1449 setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
1450 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1451 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
1452 goto end;
1453 }
1454
1455 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1456 frame_addr + offsetof(struct rt_sigframe_v1, retcode));
1457
1458 env->regs[1] = info_addr;
1459 env->regs[2] = uc_addr;
1460
1461 end:
1462 unlock_user_struct(frame, frame_addr, 1);
1463 }
1464
1465 static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
1466 target_siginfo_t *info,
1467 target_sigset_t *set, CPUState *env)
1468 {
1469 struct rt_sigframe_v2 *frame;
1470 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1471 abi_ulong info_addr, uc_addr;
1472
1473 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1474 return /* 1 */;
1475
1476 info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
1477 uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
1478 copy_siginfo_to_user(&frame->info, info);
1479
1480 setup_sigframe_v2(&frame->uc, set, env);
1481
1482 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1483 frame_addr + offsetof(struct rt_sigframe_v2, retcode));
1484
1485 env->regs[1] = info_addr;
1486 env->regs[2] = uc_addr;
1487
1488 unlock_user_struct(frame, frame_addr, 1);
1489 }
1490
1491 static void setup_rt_frame(int usig, struct target_sigaction *ka,
1492 target_siginfo_t *info,
1493 target_sigset_t *set, CPUState *env)
1494 {
1495 if (get_osversion() >= 0x020612) {
1496 setup_rt_frame_v2(usig, ka, info, set, env);
1497 } else {
1498 setup_rt_frame_v1(usig, ka, info, set, env);
1499 }
1500 }
1501
1502 static int
1503 restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
1504 {
1505 int err = 0;
1506 uint32_t cpsr;
1507
1508 __get_user_error(env->regs[0], &sc->arm_r0, err);
1509 __get_user_error(env->regs[1], &sc->arm_r1, err);
1510 __get_user_error(env->regs[2], &sc->arm_r2, err);
1511 __get_user_error(env->regs[3], &sc->arm_r3, err);
1512 __get_user_error(env->regs[4], &sc->arm_r4, err);
1513 __get_user_error(env->regs[5], &sc->arm_r5, err);
1514 __get_user_error(env->regs[6], &sc->arm_r6, err);
1515 __get_user_error(env->regs[7], &sc->arm_r7, err);
1516 __get_user_error(env->regs[8], &sc->arm_r8, err);
1517 __get_user_error(env->regs[9], &sc->arm_r9, err);
1518 __get_user_error(env->regs[10], &sc->arm_r10, err);
1519 __get_user_error(env->regs[11], &sc->arm_fp, err);
1520 __get_user_error(env->regs[12], &sc->arm_ip, err);
1521 __get_user_error(env->regs[13], &sc->arm_sp, err);
1522 __get_user_error(env->regs[14], &sc->arm_lr, err);
1523 __get_user_error(env->regs[15], &sc->arm_pc, err);
1524 #ifdef TARGET_CONFIG_CPU_32
1525 __get_user_error(cpsr, &sc->arm_cpsr, err);
1526 cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC);
1527 #endif
1528
1529 err |= !valid_user_regs(env);
1530
1531 return err;
1532 }
1533
1534 static long do_sigreturn_v1(CPUState *env)
1535 {
1536 abi_ulong frame_addr;
1537 struct sigframe_v1 *frame;
1538 target_sigset_t set;
1539 sigset_t host_set;
1540 int i;
1541
1542 /*
1543 * Since we stacked the signal on a 64-bit boundary,
1544 * then 'sp' should be word aligned here. If it's
1545 * not, then the user is trying to mess with us.
1546 */
1547 if (env->regs[13] & 7)
1548 goto badframe;
1549
1550 frame_addr = env->regs[13];
1551 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1552 goto badframe;
1553
1554 if (__get_user(set.sig[0], &frame->sc.oldmask))
1555 goto badframe;
1556 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1557 if (__get_user(set.sig[i], &frame->extramask[i - 1]))
1558 goto badframe;
1559 }
1560
1561 target_to_host_sigset_internal(&host_set, &set);
1562 sigprocmask(SIG_SETMASK, &host_set, NULL);
1563
1564 if (restore_sigcontext(env, &frame->sc))
1565 goto badframe;
1566
1567 #if 0
1568 /* Send SIGTRAP if we're single-stepping */
1569 if (ptrace_cancel_bpt(current))
1570 send_sig(SIGTRAP, current, 1);
1571 #endif
1572 unlock_user_struct(frame, frame_addr, 0);
1573 return env->regs[0];
1574
1575 badframe:
1576 unlock_user_struct(frame, frame_addr, 0);
1577 force_sig(TARGET_SIGSEGV /* , current */);
1578 return 0;
1579 }
1580
1581 static abi_ulong *restore_sigframe_v2_vfp(CPUState *env, abi_ulong *regspace)
1582 {
1583 int i;
1584 abi_ulong magic, sz;
1585 uint32_t fpscr, fpexc;
1586 struct target_vfp_sigframe *vfpframe;
1587 vfpframe = (struct target_vfp_sigframe *)regspace;
1588
1589 __get_user(magic, &vfpframe->magic);
1590 __get_user(sz, &vfpframe->size);
1591 if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) {
1592 return 0;
1593 }
1594 for (i = 0; i < 32; i++) {
1595 __get_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]);
1596 }
1597 __get_user(fpscr, &vfpframe->ufp.fpscr);
1598 vfp_set_fpscr(env, fpscr);
1599 __get_user(fpexc, &vfpframe->ufp_exc.fpexc);
1600 /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid
1601 * and the exception flag is cleared
1602 */
1603 fpexc |= (1 << 30);
1604 fpexc &= ~((1 << 31) | (1 << 28));
1605 env->vfp.xregs[ARM_VFP_FPEXC] = fpexc;
1606 __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
1607 __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
1608 return (abi_ulong*)(vfpframe + 1);
1609 }
1610
1611 static abi_ulong *restore_sigframe_v2_iwmmxt(CPUState *env, abi_ulong *regspace)
1612 {
1613 int i;
1614 abi_ulong magic, sz;
1615 struct target_iwmmxt_sigframe *iwmmxtframe;
1616 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
1617
1618 __get_user(magic, &iwmmxtframe->magic);
1619 __get_user(sz, &iwmmxtframe->size);
1620 if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) {
1621 return 0;
1622 }
1623 for (i = 0; i < 16; i++) {
1624 __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
1625 }
1626 __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
1627 __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
1628 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
1629 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
1630 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
1631 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
1632 return (abi_ulong*)(iwmmxtframe + 1);
1633 }
1634
1635 static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr,
1636 struct target_ucontext_v2 *uc)
1637 {
1638 sigset_t host_set;
1639 abi_ulong *regspace;
1640
1641 target_to_host_sigset(&host_set, &uc->tuc_sigmask);
1642 sigprocmask(SIG_SETMASK, &host_set, NULL);
1643
1644 if (restore_sigcontext(env, &uc->tuc_mcontext))
1645 return 1;
1646
1647 /* Restore coprocessor signal frame */
1648 regspace = uc->tuc_regspace;
1649 if (arm_feature(env, ARM_FEATURE_VFP)) {
1650 regspace = restore_sigframe_v2_vfp(env, regspace);
1651 if (!regspace) {
1652 return 1;
1653 }
1654 }
1655 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
1656 regspace = restore_sigframe_v2_iwmmxt(env, regspace);
1657 if (!regspace) {
1658 return 1;
1659 }
1660 }
1661
1662 if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1663 return 1;
1664
1665 #if 0
1666 /* Send SIGTRAP if we're single-stepping */
1667 if (ptrace_cancel_bpt(current))
1668 send_sig(SIGTRAP, current, 1);
1669 #endif
1670
1671 return 0;
1672 }
1673
1674 static long do_sigreturn_v2(CPUState *env)
1675 {
1676 abi_ulong frame_addr;
1677 struct sigframe_v2 *frame;
1678
1679 /*
1680 * Since we stacked the signal on a 64-bit boundary,
1681 * then 'sp' should be word aligned here. If it's
1682 * not, then the user is trying to mess with us.
1683 */
1684 if (env->regs[13] & 7)
1685 goto badframe;
1686
1687 frame_addr = env->regs[13];
1688 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1689 goto badframe;
1690
1691 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1692 goto badframe;
1693
1694 unlock_user_struct(frame, frame_addr, 0);
1695 return env->regs[0];
1696
1697 badframe:
1698 unlock_user_struct(frame, frame_addr, 0);
1699 force_sig(TARGET_SIGSEGV /* , current */);
1700 return 0;
1701 }
1702
1703 long do_sigreturn(CPUState *env)
1704 {
1705 if (get_osversion() >= 0x020612) {
1706 return do_sigreturn_v2(env);
1707 } else {
1708 return do_sigreturn_v1(env);
1709 }
1710 }
1711
1712 static long do_rt_sigreturn_v1(CPUState *env)
1713 {
1714 abi_ulong frame_addr;
1715 struct rt_sigframe_v1 *frame;
1716 sigset_t host_set;
1717
1718 /*
1719 * Since we stacked the signal on a 64-bit boundary,
1720 * then 'sp' should be word aligned here. If it's
1721 * not, then the user is trying to mess with us.
1722 */
1723 if (env->regs[13] & 7)
1724 goto badframe;
1725
1726 frame_addr = env->regs[13];
1727 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1728 goto badframe;
1729
1730 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
1731 sigprocmask(SIG_SETMASK, &host_set, NULL);
1732
1733 if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
1734 goto badframe;
1735
1736 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1737 goto badframe;
1738
1739 #if 0
1740 /* Send SIGTRAP if we're single-stepping */
1741 if (ptrace_cancel_bpt(current))
1742 send_sig(SIGTRAP, current, 1);
1743 #endif
1744 unlock_user_struct(frame, frame_addr, 0);
1745 return env->regs[0];
1746
1747 badframe:
1748 unlock_user_struct(frame, frame_addr, 0);
1749 force_sig(TARGET_SIGSEGV /* , current */);
1750 return 0;
1751 }
1752
1753 static long do_rt_sigreturn_v2(CPUState *env)
1754 {
1755 abi_ulong frame_addr;
1756 struct rt_sigframe_v2 *frame;
1757
1758 /*
1759 * Since we stacked the signal on a 64-bit boundary,
1760 * then 'sp' should be word aligned here. If it's
1761 * not, then the user is trying to mess with us.
1762 */
1763 if (env->regs[13] & 7)
1764 goto badframe;
1765
1766 frame_addr = env->regs[13];
1767 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1768 goto badframe;
1769
1770 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1771 goto badframe;
1772
1773 unlock_user_struct(frame, frame_addr, 0);
1774 return env->regs[0];
1775
1776 badframe:
1777 unlock_user_struct(frame, frame_addr, 0);
1778 force_sig(TARGET_SIGSEGV /* , current */);
1779 return 0;
1780 }
1781
1782 long do_rt_sigreturn(CPUState *env)
1783 {
1784 if (get_osversion() >= 0x020612) {
1785 return do_rt_sigreturn_v2(env);
1786 } else {
1787 return do_rt_sigreturn_v1(env);
1788 }
1789 }
1790
1791 #elif defined(TARGET_SPARC)
1792
1793 #define __SUNOS_MAXWIN 31
1794
1795 /* This is what SunOS does, so shall I. */
1796 struct target_sigcontext {
1797 abi_ulong sigc_onstack; /* state to restore */
1798
1799 abi_ulong sigc_mask; /* sigmask to restore */
1800 abi_ulong sigc_sp; /* stack pointer */
1801 abi_ulong sigc_pc; /* program counter */
1802 abi_ulong sigc_npc; /* next program counter */
1803 abi_ulong sigc_psr; /* for condition codes etc */
1804 abi_ulong sigc_g1; /* User uses these two registers */
1805 abi_ulong sigc_o0; /* within the trampoline code. */
1806
1807 /* Now comes information regarding the users window set
1808 * at the time of the signal.
1809 */
1810 abi_ulong sigc_oswins; /* outstanding windows */
1811
1812 /* stack ptrs for each regwin buf */
1813 char *sigc_spbuf[__SUNOS_MAXWIN];
1814
1815 /* Windows to restore after signal */
1816 struct {
1817 abi_ulong locals[8];
1818 abi_ulong ins[8];
1819 } sigc_wbuf[__SUNOS_MAXWIN];
1820 };
1821 /* A Sparc stack frame */
1822 struct sparc_stackf {
1823 abi_ulong locals[8];
1824 abi_ulong ins[8];
1825 /* It's simpler to treat fp and callers_pc as elements of ins[]
1826 * since we never need to access them ourselves.
1827 */
1828 char *structptr;
1829 abi_ulong xargs[6];
1830 abi_ulong xxargs[1];
1831 };
1832
1833 typedef struct {
1834 struct {
1835 abi_ulong psr;
1836 abi_ulong pc;
1837 abi_ulong npc;
1838 abi_ulong y;
1839 abi_ulong u_regs[16]; /* globals and ins */
1840 } si_regs;
1841 int si_mask;
1842 } __siginfo_t;
1843
1844 typedef struct {
1845 unsigned long si_float_regs [32];
1846 unsigned long si_fsr;
1847 unsigned long si_fpqdepth;
1848 struct {
1849 unsigned long *insn_addr;
1850 unsigned long insn;
1851 } si_fpqueue [16];
1852 } qemu_siginfo_fpu_t;
1853
1854
1855 struct target_signal_frame {
1856 struct sparc_stackf ss;
1857 __siginfo_t info;
1858 abi_ulong fpu_save;
1859 abi_ulong insns[2] __attribute__ ((aligned (8)));
1860 abi_ulong extramask[TARGET_NSIG_WORDS - 1];
1861 abi_ulong extra_size; /* Should be 0 */
1862 qemu_siginfo_fpu_t fpu_state;
1863 };
1864 struct target_rt_signal_frame {
1865 struct sparc_stackf ss;
1866 siginfo_t info;
1867 abi_ulong regs[20];
1868 sigset_t mask;
1869 abi_ulong fpu_save;
1870 unsigned int insns[2];
1871 stack_t stack;
1872 unsigned int extra_size; /* Should be 0 */
1873 qemu_siginfo_fpu_t fpu_state;
1874 };
1875
1876 #define UREG_O0 16
1877 #define UREG_O6 22
1878 #define UREG_I0 0
1879 #define UREG_I1 1
1880 #define UREG_I2 2
1881 #define UREG_I3 3
1882 #define UREG_I4 4
1883 #define UREG_I5 5
1884 #define UREG_I6 6
1885 #define UREG_I7 7
1886 #define UREG_L0 8
1887 #define UREG_FP UREG_I6
1888 #define UREG_SP UREG_O6
1889
1890 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
1891 CPUState *env, unsigned long framesize)
1892 {
1893 abi_ulong sp;
1894
1895 sp = env->regwptr[UREG_FP];
1896
1897 /* This is the X/Open sanctioned signal stack switching. */
1898 if (sa->sa_flags & TARGET_SA_ONSTACK) {
1899 if (!on_sig_stack(sp)
1900 && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
1901 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1902 }
1903 return sp - framesize;
1904 }
1905
1906 static int
1907 setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask)
1908 {
1909 int err = 0, i;
1910
1911 err |= __put_user(env->psr, &si->si_regs.psr);
1912 err |= __put_user(env->pc, &si->si_regs.pc);
1913 err |= __put_user(env->npc, &si->si_regs.npc);
1914 err |= __put_user(env->y, &si->si_regs.y);
1915 for (i=0; i < 8; i++) {
1916 err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
1917 }
1918 for (i=0; i < 8; i++) {
1919 err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
1920 }
1921 err |= __put_user(mask, &si->si_mask);
1922 return err;
1923 }
1924
1925 #if 0
1926 static int
1927 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1928 CPUState *env, unsigned long mask)
1929 {
1930 int err = 0;
1931
1932 err |= __put_user(mask, &sc->sigc_mask);
1933 err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
1934 err |= __put_user(env->pc, &sc->sigc_pc);
1935 err |= __put_user(env->npc, &sc->sigc_npc);
1936 err |= __put_user(env->psr, &sc->sigc_psr);
1937 err |= __put_user(env->gregs[1], &sc->sigc_g1);
1938 err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
1939
1940 return err;
1941 }
1942 #endif
1943 #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
1944
1945 static void setup_frame(int sig, struct target_sigaction *ka,
1946 target_sigset_t *set, CPUState *env)
1947 {
1948 abi_ulong sf_addr;
1949 struct target_signal_frame *sf;
1950 int sigframe_size, err, i;
1951
1952 /* 1. Make sure everything is clean */
1953 //synchronize_user_stack();
1954
1955 sigframe_size = NF_ALIGNEDSZ;
1956 sf_addr = get_sigframe(ka, env, sigframe_size);
1957
1958 sf = lock_user(VERIFY_WRITE, sf_addr,
1959 sizeof(struct target_signal_frame), 0);
1960 if (!sf)
1961 goto sigsegv;
1962
1963 //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1964 #if 0
1965 if (invalid_frame_pointer(sf, sigframe_size))
1966 goto sigill_and_return;
1967 #endif
1968 /* 2. Save the current process state */
1969 err = setup___siginfo(&sf->info, env, set->sig[0]);
1970 err |= __put_user(0, &sf->extra_size);
1971
1972 //err |= save_fpu_state(regs, &sf->fpu_state);
1973 //err |= __put_user(&sf->fpu_state, &sf->fpu_save);
1974
1975 err |= __put_user(set->sig[0], &sf->info.si_mask);
1976 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
1977 err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
1978 }
1979
1980 for (i = 0; i < 8; i++) {
1981 err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
1982 }
1983 for (i = 0; i < 8; i++) {
1984 err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
1985 }
1986 if (err)
1987 goto sigsegv;
1988
1989 /* 3. signal handler back-trampoline and parameters */
1990 env->regwptr[UREG_FP] = sf_addr;
1991 env->regwptr[UREG_I0] = sig;
1992 env->regwptr[UREG_I1] = sf_addr +
1993 offsetof(struct target_signal_frame, info);
1994 env->regwptr[UREG_I2] = sf_addr +
1995 offsetof(struct target_signal_frame, info);
1996
1997 /* 4. signal handler */
1998 env->pc = ka->_sa_handler;
1999 env->npc = (env->pc + 4);
2000 /* 5. return to kernel instructions */
2001 if (ka->sa_restorer)
2002 env->regwptr[UREG_I7] = ka->sa_restorer;
2003 else {
2004 uint32_t val32;
2005
2006 env->regwptr[UREG_I7] = sf_addr +
2007 offsetof(struct target_signal_frame, insns) - 2 * 4;
2008
2009 /* mov __NR_sigreturn, %g1 */
2010 val32 = 0x821020d8;
2011 err |= __put_user(val32, &sf->insns[0]);
2012
2013 /* t 0x10 */
2014 val32 = 0x91d02010;
2015 err |= __put_user(val32, &sf->insns[1]);
2016 if (err)
2017 goto sigsegv;
2018
2019 /* Flush instruction space. */
2020 //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
2021 // tb_flush(env);
2022 }
2023 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
2024 return;
2025 #if 0
2026 sigill_and_return:
2027 force_sig(TARGET_SIGILL);
2028 #endif
2029 sigsegv:
2030 //fprintf(stderr, "force_sig\n");
2031 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
2032 force_sig(TARGET_SIGSEGV);
2033 }
2034 static inline int
2035 restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu)
2036 {
2037 int err;
2038 #if 0
2039 #ifdef CONFIG_SMP
2040 if (current->flags & PF_USEDFPU)
2041 regs->psr &= ~PSR_EF;
2042 #else
2043 if (current == last_task_used_math) {
2044 last_task_used_math = 0;
2045 regs->psr &= ~PSR_EF;
2046 }
2047 #endif
2048 current->used_math = 1;
2049 current->flags &= ~PF_USEDFPU;
2050 #endif
2051 #if 0
2052 if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
2053 return -EFAULT;
2054 #endif
2055
2056 #if 0
2057 /* XXX: incorrect */
2058 err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
2059 (sizeof(unsigned long) * 32));
2060 #endif
2061 err |= __get_user(env->fsr, &fpu->si_fsr);
2062 #if 0
2063 err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
2064 if (current->thread.fpqdepth != 0)
2065 err |= __copy_from_user(&current->thread.fpqueue[0],
2066 &fpu->si_fpqueue[0],
2067 ((sizeof(unsigned long) +
2068 (sizeof(unsigned long *)))*16));
2069 #endif
2070 return err;
2071 }
2072
2073
2074 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2075 target_siginfo_t *info,
2076 target_sigset_t *set, CPUState *env)
2077 {
2078 fprintf(stderr, "setup_rt_frame: not implemented\n");
2079 }
2080
2081 long do_sigreturn(CPUState *env)
2082 {
2083 abi_ulong sf_addr;
2084 struct target_signal_frame *sf;
2085 uint32_t up_psr, pc, npc;
2086 target_sigset_t set;
2087 sigset_t host_set;
2088 int err, i;
2089
2090 sf_addr = env->regwptr[UREG_FP];
2091 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1))
2092 goto segv_and_exit;
2093 #if 0
2094 fprintf(stderr, "sigreturn\n");
2095 fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
2096 #endif
2097 //cpu_dump_state(env, stderr, fprintf, 0);
2098
2099 /* 1. Make sure we are not getting garbage from the user */
2100
2101 if (sf_addr & 3)
2102 goto segv_and_exit;
2103
2104 err = __get_user(pc, &sf->info.si_regs.pc);
2105 err |= __get_user(npc, &sf->info.si_regs.npc);
2106
2107 if ((pc | npc) & 3)
2108 goto segv_and_exit;
2109
2110 /* 2. Restore the state */
2111 err |= __get_user(up_psr, &sf->info.si_regs.psr);
2112
2113 /* User can only change condition codes and FPU enabling in %psr. */
2114 env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
2115 | (env->psr & ~(PSR_ICC /* | PSR_EF */));
2116
2117 env->pc = pc;
2118 env->npc = npc;
2119 err |= __get_user(env->y, &sf->info.si_regs.y);
2120 for (i=0; i < 8; i++) {
2121 err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
2122 }
2123 for (i=0; i < 8; i++) {
2124 err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
2125 }
2126
2127 /* FIXME: implement FPU save/restore:
2128 * __get_user(fpu_save, &sf->fpu_save);
2129 * if (fpu_save)
2130 * err |= restore_fpu_state(env, fpu_save);
2131 */
2132
2133 /* This is pretty much atomic, no amount locking would prevent
2134 * the races which exist anyways.
2135 */
2136 err |= __get_user(set.sig[0], &sf->info.si_mask);
2137 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2138 err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
2139 }
2140
2141 target_to_host_sigset_internal(&host_set, &set);
2142 sigprocmask(SIG_SETMASK, &host_set, NULL);
2143
2144 if (err)
2145 goto segv_and_exit;
2146 unlock_user_struct(sf, sf_addr, 0);
2147 return env->regwptr[0];
2148
2149 segv_and_exit:
2150 unlock_user_struct(sf, sf_addr, 0);
2151 force_sig(TARGET_SIGSEGV);
2152 }
2153
2154 long do_rt_sigreturn(CPUState *env)
2155 {
2156 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2157 return -TARGET_ENOSYS;
2158 }
2159
2160 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
2161 #define MC_TSTATE 0
2162 #define MC_PC 1
2163 #define MC_NPC 2
2164 #define MC_Y 3
2165 #define MC_G1 4
2166 #define MC_G2 5
2167 #define MC_G3 6
2168 #define MC_G4 7
2169 #define MC_G5 8
2170 #define MC_G6 9
2171 #define MC_G7 10
2172 #define MC_O0 11
2173 #define MC_O1 12
2174 #define MC_O2 13
2175 #define MC_O3 14
2176 #define MC_O4 15
2177 #define MC_O5 16
2178 #define MC_O6 17
2179 #define MC_O7 18
2180 #define MC_NGREG 19
2181
2182 typedef abi_ulong target_mc_greg_t;
2183 typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
2184
2185 struct target_mc_fq {
2186 abi_ulong *mcfq_addr;
2187 uint32_t mcfq_insn;
2188 };
2189
2190 struct target_mc_fpu {
2191 union {
2192 uint32_t sregs[32];
2193 uint64_t dregs[32];
2194 //uint128_t qregs[16];
2195 } mcfpu_fregs;
2196 abi_ulong mcfpu_fsr;
2197 abi_ulong mcfpu_fprs;
2198 abi_ulong mcfpu_gsr;
2199 struct target_mc_fq *mcfpu_fq;
2200 unsigned char mcfpu_qcnt;
2201 unsigned char mcfpu_qentsz;
2202 unsigned char mcfpu_enab;
2203 };
2204 typedef struct target_mc_fpu target_mc_fpu_t;
2205
2206 typedef struct {
2207 target_mc_gregset_t mc_gregs;
2208 target_mc_greg_t mc_fp;
2209 target_mc_greg_t mc_i7;
2210 target_mc_fpu_t mc_fpregs;
2211 } target_mcontext_t;
2212
2213 struct target_ucontext {
2214 struct target_ucontext *tuc_link;
2215 abi_ulong tuc_flags;
2216 target_sigset_t tuc_sigmask;
2217 target_mcontext_t tuc_mcontext;
2218 };
2219
2220 /* A V9 register window */
2221 struct target_reg_window {
2222 abi_ulong locals[8];
2223 abi_ulong ins[8];
2224 };
2225
2226 #define TARGET_STACK_BIAS 2047
2227
2228 /* {set, get}context() needed for 64-bit SparcLinux userland. */
2229 void sparc64_set_context(CPUSPARCState *env)
2230 {
2231 abi_ulong ucp_addr;
2232 struct target_ucontext *ucp;
2233 target_mc_gregset_t *grp;
2234 abi_ulong pc, npc, tstate;
2235 abi_ulong fp, i7, w_addr;
2236 int err;
2237 unsigned int i;
2238
2239 ucp_addr = env->regwptr[UREG_I0];
2240 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1))
2241 goto do_sigsegv;
2242 grp = &ucp->tuc_mcontext.mc_gregs;
2243 err = __get_user(pc, &((*grp)[MC_PC]));
2244 err |= __get_user(npc, &((*grp)[MC_NPC]));
2245 if (err || ((pc | npc) & 3))
2246 goto do_sigsegv;
2247 if (env->regwptr[UREG_I1]) {
2248 target_sigset_t target_set;
2249 sigset_t set;
2250
2251 if (TARGET_NSIG_WORDS == 1) {
2252 if (__get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0]))
2253 goto do_sigsegv;
2254 } else {
2255 abi_ulong *src, *dst;
2256 src = ucp->tuc_sigmask.sig;
2257 dst = target_set.sig;
2258 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2259 i++, dst++, src++)
2260 err |= __get_user(*dst, src);
2261 if (err)
2262 goto do_sigsegv;
2263 }
2264 target_to_host_sigset_internal(&set, &target_set);
2265 sigprocmask(SIG_SETMASK, &set, NULL);
2266 }
2267 env->pc = pc;
2268 env->npc = npc;
2269 err |= __get_user(env->y, &((*grp)[MC_Y]));
2270 err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
2271 env->asi = (tstate >> 24) & 0xff;
2272 cpu_put_ccr(env, tstate >> 32);
2273 cpu_put_cwp64(env, tstate & 0x1f);
2274 err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
2275 err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
2276 err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
2277 err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
2278 err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
2279 err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
2280 err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
2281 err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
2282 err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
2283 err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
2284 err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
2285 err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
2286 err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
2287 err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
2288 err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
2289
2290 err |= __get_user(fp, &(ucp->tuc_mcontext.mc_fp));
2291 err |= __get_user(i7, &(ucp->tuc_mcontext.mc_i7));
2292
2293 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2294 if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2295 abi_ulong) != 0)
2296 goto do_sigsegv;
2297 if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2298 abi_ulong) != 0)
2299 goto do_sigsegv;
2300 /* FIXME this does not match how the kernel handles the FPU in
2301 * its sparc64_set_context implementation. In particular the FPU
2302 * is only restored if fenab is non-zero in:
2303 * __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab));
2304 */
2305 err |= __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs));
2306 {
2307 uint32_t *src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2308 for (i = 0; i < 64; i++, src++) {
2309 if (i & 1) {
2310 err |= __get_user(env->fpr[i/2].l.lower, src);
2311 } else {
2312 err |= __get_user(env->fpr[i/2].l.upper, src);
2313 }
2314 }
2315 }
2316 err |= __get_user(env->fsr,
2317 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr));
2318 err |= __get_user(env->gsr,
2319 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr));
2320 if (err)
2321 goto do_sigsegv;
2322 unlock_user_struct(ucp, ucp_addr, 0);
2323 return;
2324 do_sigsegv:
2325 unlock_user_struct(ucp, ucp_addr, 0);
2326 force_sig(TARGET_SIGSEGV);
2327 }
2328
2329 void sparc64_get_context(CPUSPARCState *env)
2330 {
2331 abi_ulong ucp_addr;
2332 struct target_ucontext *ucp;
2333 target_mc_gregset_t *grp;
2334 target_mcontext_t *mcp;
2335 abi_ulong fp, i7, w_addr;
2336 int err;
2337 unsigned int i;
2338 target_sigset_t target_set;
2339 sigset_t set;
2340
2341 ucp_addr = env->regwptr[UREG_I0];
2342 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0))
2343 goto do_sigsegv;
2344
2345 mcp = &ucp->tuc_mcontext;
2346 grp = &mcp->mc_gregs;
2347
2348 /* Skip over the trap instruction, first. */
2349 env->pc = env->npc;
2350 env->npc += 4;
2351
2352 err = 0;
2353
2354 sigprocmask(0, NULL, &set);
2355 host_to_target_sigset_internal(&target_set, &set);
2356 if (TARGET_NSIG_WORDS == 1) {
2357 err |= __put_user(target_set.sig[0],
2358 (abi_ulong *)&ucp->tuc_sigmask);
2359 } else {
2360 abi_ulong *src, *dst;
2361 src = target_set.sig;
2362 dst = ucp->tuc_sigmask.sig;
2363 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2364 i++, dst++, src++)
2365 err |= __put_user(*src, dst);
2366 if (err)
2367 goto do_sigsegv;
2368 }
2369
2370 /* XXX: tstate must be saved properly */
2371 // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
2372 err |= __put_user(env->pc, &((*grp)[MC_PC]));
2373 err |= __put_user(env->npc, &((*grp)[MC_NPC]));
2374 err |= __put_user(env->y, &((*grp)[MC_Y]));
2375 err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
2376 err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
2377 err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
2378 err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
2379 err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
2380 err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
2381 err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
2382 err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
2383 err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
2384 err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
2385 err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
2386 err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
2387 err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
2388 err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
2389 err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
2390
2391 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2392 fp = i7 = 0;
2393 if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2394 abi_ulong) != 0)
2395 goto do_sigsegv;
2396 if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2397 abi_ulong) != 0)
2398 goto do_sigsegv;
2399 err |= __put_user(fp, &(mcp->mc_fp));
2400 err |= __put_user(i7, &(mcp->mc_i7));
2401
2402 {
2403 uint32_t *dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2404 for (i = 0; i < 64; i++, dst++) {
2405 if (i & 1) {
2406 err |= __put_user(env->fpr[i/2].l.lower, dst);
2407 } else {
2408 err |= __put_user(env->fpr[i/2].l.upper, dst);
2409 }
2410 }
2411 }
2412 err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
2413 err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
2414 err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
2415
2416 if (err)
2417 goto do_sigsegv;
2418 unlock_user_struct(ucp, ucp_addr, 1);
2419 return;
2420 do_sigsegv:
2421 unlock_user_struct(ucp, ucp_addr, 1);
2422 force_sig(TARGET_SIGSEGV);
2423 }
2424 #endif
2425 #elif defined(TARGET_ABI_MIPSN64)
2426
2427 # warning signal handling not implemented
2428
2429 static void setup_frame(int sig, struct target_sigaction *ka,
2430 target_sigset_t *set, CPUState *env)
2431 {
2432 fprintf(stderr, "setup_frame: not implemented\n");
2433 }
2434
2435 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2436 target_siginfo_t *info,
2437 target_sigset_t *set, CPUState *env)
2438 {
2439 fprintf(stderr, "setup_rt_frame: not implemented\n");
2440 }
2441
2442 long do_sigreturn(CPUState *env)
2443 {
2444 fprintf(stderr, "do_sigreturn: not implemented\n");
2445 return -TARGET_ENOSYS;
2446 }
2447
2448 long do_rt_sigreturn(CPUState *env)
2449 {
2450 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2451 return -TARGET_ENOSYS;
2452 }
2453
2454 #elif defined(TARGET_ABI_MIPSN32)
2455
2456 # warning signal handling not implemented
2457
2458 static void setup_frame(int sig, struct target_sigaction *ka,
2459 target_sigset_t *set, CPUState *env)
2460 {
2461 fprintf(stderr, "setup_frame: not implemented\n");
2462 }
2463
2464 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2465 target_siginfo_t *info,
2466 target_sigset_t *set, CPUState *env)
2467 {
2468 fprintf(stderr, "setup_rt_frame: not implemented\n");
2469 }
2470
2471 long do_sigreturn(CPUState *env)
2472 {
2473 fprintf(stderr, "do_sigreturn: not implemented\n");
2474 return -TARGET_ENOSYS;
2475 }
2476
2477 long do_rt_sigreturn(CPUState *env)
2478 {
2479 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2480 return -TARGET_ENOSYS;
2481 }
2482
2483 #elif defined(TARGET_ABI_MIPSO32)
2484
2485 struct target_sigcontext {
2486 uint32_t sc_regmask; /* Unused */
2487 uint32_t sc_status;
2488 uint64_t sc_pc;
2489 uint64_t sc_regs[32];
2490 uint64_t sc_fpregs[32];
2491 uint32_t sc_ownedfp; /* Unused */
2492 uint32_t sc_fpc_csr;
2493 uint32_t sc_fpc_eir; /* Unused */
2494 uint32_t sc_used_math;
2495 uint32_t sc_dsp; /* dsp status, was sc_ssflags */
2496 uint32_t pad0;
2497 uint64_t sc_mdhi;
2498 uint64_t sc_mdlo;
2499 target_ulong sc_hi1; /* Was sc_cause */
2500 target_ulong sc_lo1; /* Was sc_badvaddr */
2501 target_ulong sc_hi2; /* Was sc_sigset[4] */
2502 target_ulong sc_lo2;
2503 target_ulong sc_hi3;
2504 target_ulong sc_lo3;
2505 };
2506
2507 struct sigframe {
2508 uint32_t sf_ass[4]; /* argument save space for o32 */
2509 uint32_t sf_code[2]; /* signal trampoline */
2510 struct target_sigcontext sf_sc;
2511 target_sigset_t sf_mask;
2512 };
2513
2514 struct target_ucontext {
2515 target_ulong tuc_flags;
2516 target_ulong tuc_link;
2517 target_stack_t tuc_stack;
2518 target_ulong pad0;
2519 struct target_sigcontext tuc_mcontext;
2520 target_sigset_t tuc_sigmask;
2521 };
2522
2523 struct target_rt_sigframe {
2524 uint32_t rs_ass[4]; /* argument save space for o32 */
2525 uint32_t rs_code[2]; /* signal trampoline */
2526 struct target_siginfo rs_info;
2527 struct target_ucontext rs_uc;
2528 };
2529
2530 /* Install trampoline to jump back from signal handler */
2531 static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
2532 {
2533 int err;
2534
2535 /*
2536 * Set up the return code ...
2537 *
2538 * li v0, __NR__foo_sigreturn
2539 * syscall
2540 */
2541
2542 err = __put_user(0x24020000 + syscall, tramp + 0);
2543 err |= __put_user(0x0000000c , tramp + 1);
2544 /* flush_cache_sigtramp((unsigned long) tramp); */
2545 return err;
2546 }
2547
2548 static inline int
2549 setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2550 {
2551 int err = 0;
2552
2553 err |= __put_user(regs->active_tc.PC, &sc->sc_pc);
2554
2555 #define save_gp_reg(i) do { \
2556 err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
2557 } while(0)
2558 __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2);
2559 save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6);
2560 save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10);
2561 save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
2562 save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18);
2563 save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22);
2564 save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
2565 save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30);
2566 save_gp_reg(31);
2567 #undef save_gp_reg
2568
2569 err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2570 err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2571
2572 /* Not used yet, but might be useful if we ever have DSP suppport */
2573 #if 0
2574 if (cpu_has_dsp) {
2575 err |= __put_user(mfhi1(), &sc->sc_hi1);
2576 err |= __put_user(mflo1(), &sc->sc_lo1);
2577 err |= __put_user(mfhi2(), &sc->sc_hi2);
2578 err |= __put_user(mflo2(), &sc->sc_lo2);
2579 err |= __put_user(mfhi3(), &sc->sc_hi3);
2580 err |= __put_user(mflo3(), &sc->sc_lo3);
2581 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2582 }
2583 /* same with 64 bit */
2584 #ifdef CONFIG_64BIT
2585 err |= __put_user(regs->hi, &sc->sc_hi[0]);
2586 err |= __put_user(regs->lo, &sc->sc_lo[0]);
2587 if (cpu_has_dsp) {
2588 err |= __put_user(mfhi1(), &sc->sc_hi[1]);
2589 err |= __put_user(mflo1(), &sc->sc_lo[1]);
2590 err |= __put_user(mfhi2(), &sc->sc_hi[2]);
2591 err |= __put_user(mflo2(), &sc->sc_lo[2]);
2592 err |= __put_user(mfhi3(), &sc->sc_hi[3]);
2593 err |= __put_user(mflo3(), &sc->sc_lo[3]);
2594 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2595 }
2596 #endif
2597 #endif
2598
2599 #if 0
2600 err |= __put_user(!!used_math(), &sc->sc_used_math);
2601
2602 if (!used_math())
2603 goto out;
2604
2605 /*
2606 * Save FPU state to signal context. Signal handler will "inherit"
2607 * current FPU state.
2608 */
2609 preempt_disable();
2610
2611 if (!is_fpu_owner()) {
2612 own_fpu();
2613 restore_fp(current);
2614 }
2615 err |= save_fp_context(sc);
2616
2617 preempt_enable();
2618 out:
2619 #endif
2620 return err;
2621 }
2622
2623 static inline int
2624 restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2625 {
2626 int err = 0;
2627
2628 err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
2629
2630 err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2631 err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2632
2633 #define restore_gp_reg(i) do { \
2634 err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
2635 } while(0)
2636 restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3);
2637 restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6);
2638 restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9);
2639 restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12);
2640 restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15);
2641 restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18);
2642 restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21);
2643 restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24);
2644 restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27);
2645 restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30);
2646 restore_gp_reg(31);
2647 #undef restore_gp_reg
2648
2649 #if 0
2650 if (cpu_has_dsp) {
2651 err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
2652 err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
2653 err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
2654 err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
2655 err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
2656 err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
2657 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2658 }
2659 #ifdef CONFIG_64BIT
2660 err |= __get_user(regs->hi, &sc->sc_hi[0]);
2661 err |= __get_user(regs->lo, &sc->sc_lo[0]);
2662 if (cpu_has_dsp) {
2663 err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
2664 err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
2665 err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
2666 err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
2667 err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
2668 err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
2669 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2670 }
2671 #endif
2672
2673 err |= __get_user(used_math, &sc->sc_used_math);
2674 conditional_used_math(used_math);
2675
2676 preempt_disable();
2677
2678 if (used_math()) {
2679 /* restore fpu context if we have used it before */
2680 own_fpu();
2681 err |= restore_fp_context(sc);
2682 } else {
2683 /* signal handler may have used FPU. Give it up. */
2684 lose_fpu();
2685 }
2686
2687 preempt_enable();
2688 #endif
2689 return err;
2690 }
2691 /*
2692 * Determine which stack to use..
2693 */
2694 static inline abi_ulong
2695 get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
2696 {
2697 unsigned long sp;
2698
2699 /* Default to using normal stack */
2700 sp = regs->active_tc.gpr[29];
2701
2702 /*
2703 * FPU emulator may have its own trampoline active just
2704 * above the user stack, 16-bytes before the next lowest
2705 * 16 byte boundary. Try to avoid trashing it.
2706 */
2707 sp -= 32;
2708
2709 /* This is the X/Open sanctioned signal stack switching. */
2710 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
2711 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2712 }
2713
2714 return (sp - frame_size) & ~7;
2715 }
2716
2717 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */
2718 static void setup_frame(int sig, struct target_sigaction * ka,
2719 target_sigset_t *set, CPUState *regs)
2720 {
2721 struct sigframe *frame;
2722 abi_ulong frame_addr;
2723 int i;
2724
2725 frame_addr = get_sigframe(ka, regs, sizeof(*frame));
2726 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2727 goto give_sigsegv;
2728
2729 install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
2730
2731 if(setup_sigcontext(regs, &frame->sf_sc))
2732 goto give_sigsegv;
2733
2734 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2735 if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
2736 goto give_sigsegv;
2737 }
2738
2739 /*
2740 * Arguments to signal handler:
2741 *
2742 * a0 = signal number
2743 * a1 = 0 (should be cause)
2744 * a2 = pointer to struct sigcontext
2745 *
2746 * $25 and PC point to the signal handler, $29 points to the
2747 * struct sigframe.
2748 */
2749 regs->active_tc.gpr[ 4] = sig;
2750 regs->active_tc.gpr[ 5] = 0;
2751 regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
2752 regs->active_tc.gpr[29] = frame_addr;
2753 regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
2754 /* The original kernel code sets CP0_EPC to the handler
2755 * since it returns to userland using eret
2756 * we cannot do this here, and we must set PC directly */
2757 regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
2758 unlock_user_struct(frame, frame_addr, 1);
2759 return;
2760
2761 give_sigsegv:
2762 unlock_user_struct(frame, frame_addr, 1);
2763 force_sig(TARGET_SIGSEGV/*, current*/);
2764 return;
2765 }
2766
2767 long do_sigreturn(CPUState *regs)
2768 {
2769 struct sigframe *frame;
2770 abi_ulong frame_addr;
2771 sigset_t blocked;
2772 target_sigset_t target_set;
2773 int i;
2774
2775 #if defined(DEBUG_SIGNAL)
2776 fprintf(stderr, "do_sigreturn\n");
2777 #endif
2778 frame_addr = regs->active_tc.gpr[29];
2779 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2780 goto badframe;
2781
2782 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2783 if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
2784 goto badframe;
2785 }
2786
2787 target_to_host_sigset_internal(&blocked, &target_set);
2788 sigprocmask(SIG_SETMASK, &blocked, NULL);
2789
2790 if (restore_sigcontext(regs, &frame->sf_sc))
2791 goto badframe;
2792
2793 #if 0
2794 /*
2795 * Don't let your children do this ...
2796 */
2797 __asm__ __volatile__(
2798 "move\t$29, %0\n\t"
2799 "j\tsyscall_exit"
2800 :/* no outputs */
2801 :"r" (&regs));
2802 /* Unreached */
2803 #endif
2804
2805 regs->active_tc.PC = regs->CP0_EPC;
2806 /* I am not sure this is right, but it seems to work
2807 * maybe a problem with nested signals ? */
2808 regs->CP0_EPC = 0;
2809 return -TARGET_QEMU_ESIGRETURN;
2810
2811 badframe:
2812 force_sig(TARGET_SIGSEGV/*, current*/);
2813 return 0;
2814 }
2815
2816 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2817 target_siginfo_t *info,
2818 target_sigset_t *set, CPUState *env)
2819 {
2820 struct target_rt_sigframe *frame;
2821 abi_ulong frame_addr;
2822 int i;
2823
2824 frame_addr = get_sigframe(ka, env, sizeof(*frame));
2825 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2826 goto give_sigsegv;
2827
2828 install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn);
2829
2830 copy_siginfo_to_user(&frame->rs_info, info);
2831
2832 __put_user(0, &frame->rs_uc.tuc_flags);
2833 __put_user(0, &frame->rs_uc.tuc_link);
2834 __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp);
2835 __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size);
2836 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
2837 &frame->rs_uc.tuc_stack.ss_flags);
2838
2839 setup_sigcontext(env, &frame->rs_uc.tuc_mcontext);
2840
2841 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2842 __put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]);
2843 }
2844
2845 /*
2846 * Arguments to signal handler:
2847 *
2848 * a0 = signal number
2849 * a1 = pointer to struct siginfo
2850 * a2 = pointer to struct ucontext
2851 *
2852 * $25 and PC point to the signal handler, $29 points to the
2853 * struct sigframe.
2854 */
2855 env->active_tc.gpr[ 4] = sig;
2856 env->active_tc.gpr[ 5] = frame_addr
2857 + offsetof(struct target_rt_sigframe, rs_info);
2858 env->active_tc.gpr[ 6] = frame_addr
2859 + offsetof(struct target_rt_sigframe, rs_uc);
2860 env->active_tc.gpr[29] = frame_addr;
2861 env->active_tc.gpr[31] = frame_addr
2862 + offsetof(struct target_rt_sigframe, rs_code);
2863 /* The original kernel code sets CP0_EPC to the handler
2864 * since it returns to userland using eret
2865 * we cannot do this here, and we must set PC directly */
2866 env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
2867 unlock_user_struct(frame, frame_addr, 1);
2868 return;
2869
2870 give_sigsegv:
2871 unlock_user_struct(frame, frame_addr, 1);
2872 force_sig(TARGET_SIGSEGV/*, current*/);
2873 return;
2874 }
2875
2876 long do_rt_sigreturn(CPUState *env)
2877 {
2878 struct target_rt_sigframe *frame;
2879 abi_ulong frame_addr;
2880 sigset_t blocked;
2881
2882 #if defined(DEBUG_SIGNAL)
2883 fprintf(stderr, "do_rt_sigreturn\n");
2884 #endif
2885 frame_addr = env->active_tc.gpr[29];
2886 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2887 goto badframe;
2888
2889 target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask);
2890 sigprocmask(SIG_SETMASK, &blocked, NULL);
2891
2892 if (restore_sigcontext(env, &frame->rs_uc.tuc_mcontext))
2893 goto badframe;
2894
2895 if (do_sigaltstack(frame_addr +
2896 offsetof(struct target_rt_sigframe, rs_uc.tuc_stack),
2897 0, get_sp_from_cpustate(env)) == -EFAULT)
2898 goto badframe;
2899
2900 env->active_tc.PC = env->CP0_EPC;
2901 /* I am not sure this is right, but it seems to work
2902 * maybe a problem with nested signals ? */
2903 env->CP0_EPC = 0;
2904 return -TARGET_QEMU_ESIGRETURN;
2905
2906 badframe:
2907 force_sig(TARGET_SIGSEGV/*, current*/);
2908 return 0;
2909 }
2910
2911 #elif defined(TARGET_SH4)
2912
2913 /*
2914 * code and data structures from linux kernel:
2915 * include/asm-sh/sigcontext.h
2916 * arch/sh/kernel/signal.c
2917 */
2918
2919 struct target_sigcontext {
2920 target_ulong oldmask;
2921
2922 /* CPU registers */
2923 target_ulong sc_gregs[16];
2924 target_ulong sc_pc;
2925 target_ulong sc_pr;
2926 target_ulong sc_sr;
2927 target_ulong sc_gbr;
2928 target_ulong sc_mach;
2929 target_ulong sc_macl;
2930
2931 /* FPU registers */
2932 target_ulong sc_fpregs[16];
2933 target_ulong sc_xfpregs[16];
2934 unsigned int sc_fpscr;
2935 unsigned int sc_fpul;
2936 unsigned int sc_ownedfp;
2937 };
2938
2939 struct target_sigframe
2940 {
2941 struct target_sigcontext sc;
2942 target_ulong extramask[TARGET_NSIG_WORDS-1];
2943 uint16_t retcode[3];
2944 };
2945
2946
2947 struct target_ucontext {
2948 target_ulong tuc_flags;
2949 struct target_ucontext *tuc_link;
2950 target_stack_t tuc_stack;
2951 struct target_sigcontext tuc_mcontext;
2952 target_sigset_t tuc_sigmask; /* mask last for extensibility */
2953 };
2954
2955 struct target_rt_sigframe
2956 {
2957 struct target_siginfo info;
2958 struct target_ucontext uc;
2959 uint16_t retcode[3];
2960 };
2961
2962
2963 #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
2964 #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
2965
2966 static abi_ulong get_sigframe(struct target_sigaction *ka,
2967 unsigned long sp, size_t frame_size)
2968 {
2969 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
2970 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2971 }
2972
2973 return (sp - frame_size) & -8ul;
2974 }
2975
2976 static int setup_sigcontext(struct target_sigcontext *sc,
2977 CPUState *regs, unsigned long mask)
2978 {
2979 int err = 0;
2980 int i;
2981
2982 #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
2983 COPY(gregs[0]); COPY(gregs[1]);
2984 COPY(gregs[2]); COPY(gregs[3]);
2985 COPY(gregs[4]); COPY(gregs[5]);
2986 COPY(gregs[6]); COPY(gregs[7]);
2987 COPY(gregs[8]); COPY(gregs[9]);
2988 COPY(gregs[10]); COPY(gregs[11]);
2989 COPY(gregs[12]); COPY(gregs[13]);
2990 COPY(gregs[14]); COPY(gregs[15]);
2991 COPY(gbr); COPY(mach);
2992 COPY(macl); COPY(pr);
2993 COPY(sr); COPY(pc);
2994 #undef COPY
2995
2996 for (i=0; i<16; i++) {
2997 err |= __put_user(regs->fregs[i], &sc->sc_fpregs[i]);
2998 }
2999 err |= __put_user(regs->fpscr, &sc->sc_fpscr);
3000 err |= __put_user(regs->fpul, &sc->sc_fpul);
3001
3002 /* non-iBCS2 extensions.. */
3003 err |= __put_user(mask, &sc->oldmask);
3004
3005 return err;
3006 }
3007
3008 static int restore_sigcontext(CPUState *regs, struct target_sigcontext *sc,
3009 target_ulong *r0_p)
3010 {
3011 unsigned int err = 0;
3012 int i;
3013
3014 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
3015 COPY(gregs[1]);
3016 COPY(gregs[2]); COPY(gregs[3]);
3017 COPY(gregs[4]); COPY(gregs[5]);
3018 COPY(gregs[6]); COPY(gregs[7]);
3019 COPY(gregs[8]); COPY(gregs[9]);
3020 COPY(gregs[10]); COPY(gregs[11]);
3021 COPY(gregs[12]); COPY(gregs[13]);
3022 COPY(gregs[14]); COPY(gregs[15]);
3023 COPY(gbr); COPY(mach);
3024 COPY(macl); COPY(pr);
3025 COPY(sr); COPY(pc);
3026 #undef COPY
3027
3028 for (i=0; i<16; i++) {
3029 err |= __get_user(regs->fregs[i], &sc->sc_fpregs[i]);
3030 }
3031 err |= __get_user(regs->fpscr, &sc->sc_fpscr);
3032 err |= __get_user(regs->fpul, &sc->sc_fpul);
3033
3034 regs->tra = -1; /* disable syscall checks */
3035 err |= __get_user(*r0_p, &sc->sc_gregs[0]);
3036 return err;
3037 }
3038
3039 static void setup_frame(int sig, struct target_sigaction *ka,
3040 target_sigset_t *set, CPUState *regs)
3041 {
3042 struct target_sigframe *frame;
3043 abi_ulong frame_addr;
3044 int i;
3045 int err = 0;
3046 int signal;
3047
3048 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
3049 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3050 goto give_sigsegv;
3051
3052 signal = current_exec_domain_sig(sig);
3053
3054 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
3055
3056 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
3057 err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
3058 }
3059
3060 /* Set up to return from userspace. If provided, use a stub
3061 already in userspace. */
3062 if (ka->sa_flags & TARGET_SA_RESTORER) {
3063 regs->pr = (unsigned long) ka->sa_restorer;
3064 } else {
3065 /* Generate return code (system call to sigreturn) */
3066 err |= __put_user(MOVW(2), &frame->retcode[0]);
3067 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
3068 err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
3069 regs->pr = (unsigned long) frame->retcode;
3070 }
3071
3072 if (err)
3073 goto give_sigsegv;
3074
3075 /* Set up registers for signal handler */
3076 regs->gregs[15] = frame_addr;
3077 regs->gregs[4] = signal; /* Arg for signal handler */
3078 regs->gregs[5] = 0;
3079 regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc);
3080 regs->pc = (unsigned long) ka->_sa_handler;
3081
3082 unlock_user_struct(frame, frame_addr, 1);
3083 return;
3084
3085 give_sigsegv:
3086 unlock_user_struct(frame, frame_addr, 1);
3087 force_sig(TARGET_SIGSEGV);
3088 }
3089
3090 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3091 target_siginfo_t *info,
3092 target_sigset_t *set, CPUState *regs)
3093 {
3094 struct target_rt_sigframe *frame;
3095 abi_ulong frame_addr;
3096 int i;
3097 int err = 0;
3098 int signal;
3099
3100 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
3101 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3102 goto give_sigsegv;
3103
3104 signal = current_exec_domain_sig(sig);
3105
3106 err |= copy_siginfo_to_user(&frame->info, info);
3107
3108 /* Create the ucontext. */
3109 err |= __put_user(0, &frame->uc.tuc_flags);
3110 err |= __put_user(0, (unsigned long *)&frame->uc.tuc_link);
3111 err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp,
3112 &frame->uc.tuc_stack.ss_sp);
3113 err |= __put_user(sas_ss_flags(regs->gregs[15]),
3114 &frame->uc.tuc_stack.ss_flags);
3115 err |= __put_user(target_sigaltstack_used.ss_size,
3116 &frame->uc.tuc_stack.ss_size);
3117 err |= setup_sigcontext(&frame->uc.tuc_mcontext,
3118 regs, set->sig[0]);
3119 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
3120 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
3121 }
3122
3123 /* Set up to return from userspace. If provided, use a stub
3124 already in userspace. */
3125 if (ka->sa_flags & TARGET_SA_RESTORER) {
3126 regs->pr = (unsigned long) ka->sa_restorer;
3127 } else {
3128 /* Generate return code (system call to sigreturn) */
3129 err |= __put_user(MOVW(2), &frame->retcode[0]);
3130 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
3131 err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
3132 regs->pr = (unsigned long) frame->retcode;
3133 }
3134
3135 if (err)
3136 goto give_sigsegv;
3137
3138 /* Set up registers for signal handler */
3139 regs->gregs[15] = frame_addr;
3140 regs->gregs[4] = signal; /* Arg for signal handler */
3141 regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info);
3142 regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc);
3143 regs->pc = (unsigned long) ka->_sa_handler;
3144
3145 unlock_user_struct(frame, frame_addr, 1);
3146 return;
3147
3148 give_sigsegv:
3149 unlock_user_struct(frame, frame_addr, 1);
3150 force_sig(TARGET_SIGSEGV);
3151 }
3152
3153 long do_sigreturn(CPUState *regs)
3154 {
3155 struct target_sigframe *frame;
3156 abi_ulong frame_addr;
3157 sigset_t blocked;
3158 target_sigset_t target_set;
3159 target_ulong r0;
3160 int i;
3161 int err = 0;
3162
3163 #if defined(DEBUG_SIGNAL)
3164 fprintf(stderr, "do_sigreturn\n");
3165 #endif
3166 frame_addr = regs->gregs[15];
3167 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3168 goto badframe;
3169
3170 err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
3171 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3172 err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
3173 }
3174
3175 if (err)
3176 goto badframe;
3177
3178 target_to_host_sigset_internal(&blocked, &target_set);
3179 sigprocmask(SIG_SETMASK, &blocked, NULL);
3180
3181 if (restore_sigcontext(regs, &frame->sc, &r0))
3182 goto badframe;
3183
3184 unlock_user_struct(frame, frame_addr, 0);
3185 return r0;
3186
3187 badframe:
3188 unlock_user_struct(frame, frame_addr, 0);
3189 force_sig(TARGET_SIGSEGV);
3190 return 0;
3191 }
3192
3193 long do_rt_sigreturn(CPUState *regs)
3194 {
3195 struct target_rt_sigframe *frame;
3196 abi_ulong frame_addr;
3197 sigset_t blocked;
3198 target_ulong r0;
3199
3200 #if defined(DEBUG_SIGNAL)
3201 fprintf(stderr, "do_rt_sigreturn\n");
3202 #endif
3203 frame_addr = regs->gregs[15];
3204 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3205 goto badframe;
3206
3207 target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask);
3208 sigprocmask(SIG_SETMASK, &blocked, NULL);
3209
3210 if (restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0))
3211 goto badframe;
3212
3213 if (do_sigaltstack(frame_addr +
3214 offsetof(struct target_rt_sigframe, uc.tuc_stack),
3215 0, get_sp_from_cpustate(regs)) == -EFAULT)
3216 goto badframe;
3217
3218 unlock_user_struct(frame, frame_addr, 0);
3219 return r0;
3220
3221 badframe:
3222 unlock_user_struct(frame, frame_addr, 0);
3223 force_sig(TARGET_SIGSEGV);
3224 return 0;
3225 }
3226 #elif defined(TARGET_MICROBLAZE)
3227
3228 struct target_sigcontext {
3229 struct target_pt_regs regs; /* needs to be first */
3230 uint32_t oldmask;
3231 };
3232
3233 struct target_stack_t {
3234 abi_ulong ss_sp;
3235 int ss_flags;
3236 unsigned int ss_size;
3237 };
3238
3239 struct target_ucontext {
3240 abi_ulong tuc_flags;
3241 abi_ulong tuc_link;
3242 struct target_stack_t tuc_stack;
3243 struct target_sigcontext tuc_mcontext;
3244 uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1];
3245 };
3246
3247 /* Signal frames. */
3248 struct target_signal_frame {
3249 struct target_ucontext uc;
3250 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3251 uint32_t tramp[2];
3252 };
3253
3254 struct rt_signal_frame {
3255 struct siginfo info;
3256 struct ucontext uc;
3257 uint32_t tramp[2];
3258 };
3259
3260 static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env)
3261 {
3262 __put_user(env->regs[0], &sc->regs.r0);
3263 __put_user(env->regs[1], &sc->regs.r1);
3264 __put_user(env->regs[2], &sc->regs.r2);
3265 __put_user(env->regs[3], &sc->regs.r3);
3266 __put_user(env->regs[4], &sc->regs.r4);
3267 __put_user(env->regs[5], &sc->regs.r5);
3268 __put_user(env->regs[6], &sc->regs.r6);
3269 __put_user(env->regs[7], &sc->regs.r7);
3270 __put_user(env->regs[8], &sc->regs.r8);
3271 __put_user(env->regs[9], &sc->regs.r9);
3272 __put_user(env->regs[10], &sc->regs.r10);
3273 __put_user(env->regs[11], &sc->regs.r11);
3274 __put_user(env->regs[12], &sc->regs.r12);
3275 __put_user(env->regs[13], &sc->regs.r13);
3276 __put_user(env->regs[14], &sc->regs.r14);
3277 __put_user(env->regs[15], &sc->regs.r15);
3278 __put_user(env->regs[16], &sc->regs.r16);
3279 __put_user(env->regs[17], &sc->regs.r17);
3280 __put_user(env->regs[18], &sc->regs.r18);
3281 __put_user(env->regs[19], &sc->regs.r19);
3282 __put_user(env->regs[20], &sc->regs.r20);
3283 __put_user(env->regs[21], &sc->regs.r21);
3284 __put_user(env->regs[22], &sc->regs.r22);
3285 __put_user(env->regs[23], &sc->regs.r23);
3286 __put_user(env->regs[24], &sc->regs.r24);
3287 __put_user(env->regs[25], &sc->regs.r25);
3288 __put_user(env->regs[26], &sc->regs.r26);
3289 __put_user(env->regs[27], &sc->regs.r27);
3290 __put_user(env->regs[28], &sc->regs.r28);
3291 __put_user(env->regs[29], &sc->regs.r29);
3292 __put_user(env->regs[30], &sc->regs.r30);
3293 __put_user(env->regs[31], &sc->regs.r31);
3294 __put_user(env->sregs[SR_PC], &sc->regs.pc);
3295 }
3296
3297 static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env)
3298 {
3299 __get_user(env->regs[0], &sc->regs.r0);
3300 __get_user(env->regs[1], &sc->regs.r1);
3301 __get_user(env->regs[2], &sc->regs.r2);
3302 __get_user(env->regs[3], &sc->regs.r3);
3303 __get_user(env->regs[4], &sc->regs.r4);
3304 __get_user(env->regs[5], &sc->regs.r5);
3305 __get_user(env->regs[6], &sc->regs.r6);
3306 __get_user(env->regs[7], &sc->regs.r7);
3307 __get_user(env->regs[8], &sc->regs.r8);
3308 __get_user(env->regs[9], &sc->regs.r9);
3309 __get_user(env->regs[10], &sc->regs.r10);
3310 __get_user(env->regs[11], &sc->regs.r11);
3311 __get_user(env->regs[12], &sc->regs.r12);
3312 __get_user(env->regs[13], &sc->regs.r13);
3313 __get_user(env->regs[14], &sc->regs.r14);
3314 __get_user(env->regs[15], &sc->regs.r15);
3315 __get_user(env->regs[16], &sc->regs.r16);
3316 __get_user(env->regs[17], &sc->regs.r17);
3317 __get_user(env->regs[18], &sc->regs.r18);
3318 __get_user(env->regs[19], &sc->regs.r19);
3319 __get_user(env->regs[20], &sc->regs.r20);
3320 __get_user(env->regs[21], &sc->regs.r21);
3321 __get_user(env->regs[22], &sc->regs.r22);
3322 __get_user(env->regs[23], &sc->regs.r23);
3323 __get_user(env->regs[24], &sc->regs.r24);
3324 __get_user(env->regs[25], &sc->regs.r25);
3325 __get_user(env->regs[26], &sc->regs.r26);
3326 __get_user(env->regs[27], &sc->regs.r27);
3327 __get_user(env->regs[28], &sc->regs.r28);
3328 __get_user(env->regs[29], &sc->regs.r29);
3329 __get_user(env->regs[30], &sc->regs.r30);
3330 __get_user(env->regs[31], &sc->regs.r31);
3331 __get_user(env->sregs[SR_PC], &sc->regs.pc);
3332 }
3333
3334 static abi_ulong get_sigframe(struct target_sigaction *ka,
3335 CPUState *env, int frame_size)
3336 {
3337 abi_ulong sp = env->regs[1];
3338
3339 if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp))
3340 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3341
3342 return ((sp - frame_size) & -8UL);
3343 }
3344
3345 static void setup_frame(int sig, struct target_sigaction *ka,
3346 target_sigset_t *set, CPUState *env)
3347 {
3348 struct target_signal_frame *frame;
3349 abi_ulong frame_addr;
3350 int err = 0;
3351 int i;
3352
3353 frame_addr = get_sigframe(ka, env, sizeof *frame);
3354 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3355 goto badframe;
3356
3357 /* Save the mask. */
3358 err |= __put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask);
3359 if (err)
3360 goto badframe;
3361
3362 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3363 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
3364 goto badframe;
3365 }
3366
3367 setup_sigcontext(&frame->uc.tuc_mcontext, env);
3368
3369 /* Set up to return from userspace. If provided, use a stub
3370 already in userspace. */
3371 /* minus 8 is offset to cater for "rtsd r15,8" offset */
3372 if (ka->sa_flags & TARGET_SA_RESTORER) {
3373 env->regs[15] = ((unsigned long)ka->sa_restorer)-8;
3374 } else {
3375 uint32_t t;
3376 /* Note, these encodings are _big endian_! */
3377 /* addi r12, r0, __NR_sigreturn */
3378 t = 0x31800000UL | TARGET_NR_sigreturn;
3379 err |= __put_user(t, frame->tramp + 0);
3380 /* brki r14, 0x8 */
3381 t = 0xb9cc0008UL;
3382 err |= __put_user(t, frame->tramp + 1);
3383
3384 /* Return from sighandler will jump to the tramp.
3385 Negative 8 offset because return is rtsd r15, 8 */
3386 env->regs[15] = ((unsigned long)frame->tramp) - 8;
3387 }
3388
3389 if (err)
3390 goto badframe;
3391
3392 /* Set up registers for signal handler */
3393 env->regs[1] = frame_addr;
3394 /* Signal handler args: */
3395 env->regs[5] = sig; /* Arg 0: signum */
3396 env->regs[6] = 0;
3397 /* arg 1: sigcontext */
3398 env->regs[7] = frame_addr += offsetof(typeof(*frame), uc);
3399
3400 /* Offset of 4 to handle microblaze rtid r14, 0 */
3401 env->sregs[SR_PC] = (unsigned long)ka->_sa_handler;
3402
3403 unlock_user_struct(frame, frame_addr, 1);
3404 return;
3405 badframe:
3406 unlock_user_struct(frame, frame_addr, 1);
3407 force_sig(TARGET_SIGSEGV);
3408 }
3409
3410 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3411 target_siginfo_t *info,
3412 target_sigset_t *set, CPUState *env)
3413 {
3414 fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n");
3415 }
3416
3417 long do_sigreturn(CPUState *env)
3418 {
3419 struct target_signal_frame *frame;
3420 abi_ulong frame_addr;
3421 target_sigset_t target_set;
3422 sigset_t set;
3423 int i;
3424
3425 frame_addr = env->regs[R_SP];
3426 /* Make sure the guest isn't playing games. */
3427 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3428 goto badframe;
3429
3430 /* Restore blocked signals */
3431 if (__get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask))
3432 goto badframe;
3433 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3434 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3435 goto badframe;
3436 }
3437 target_to_host_sigset_internal(&set, &target_set);
3438 sigprocmask(SIG_SETMASK, &set, NULL);
3439
3440 restore_sigcontext(&frame->uc.tuc_mcontext, env);
3441 /* We got here through a sigreturn syscall, our path back is via an
3442 rtb insn so setup r14 for that. */
3443 env->regs[14] = env->sregs[SR_PC];
3444
3445 unlock_user_struct(frame, frame_addr, 0);
3446 return env->regs[10];
3447 badframe:
3448 unlock_user_struct(frame, frame_addr, 0);
3449 force_sig(TARGET_SIGSEGV);
3450 }
3451
3452 long do_rt_sigreturn(CPUState *env)
3453 {
3454 fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n");
3455 return -TARGET_ENOSYS;
3456 }
3457
3458 #elif defined(TARGET_CRIS)
3459
3460 struct target_sigcontext {
3461 struct target_pt_regs regs; /* needs to be first */
3462 uint32_t oldmask;
3463 uint32_t usp; /* usp before stacking this gunk on it */
3464 };
3465
3466 /* Signal frames. */
3467 struct target_signal_frame {
3468 struct target_sigcontext sc;
3469 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3470 uint8_t retcode[8]; /* Trampoline code. */
3471 };
3472
3473 struct rt_signal_frame {
3474 struct siginfo *pinfo;
3475 void *puc;
3476 struct siginfo info;
3477 struct ucontext uc;
3478 uint8_t retcode[8]; /* Trampoline code. */
3479 };
3480
3481 static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env)
3482 {
3483 __put_user(env->regs[0], &sc->regs.r0);
3484 __put_user(env->regs[1], &sc->regs.r1);
3485 __put_user(env->regs[2], &sc->regs.r2);
3486 __put_user(env->regs[3], &sc->regs.r3);
3487 __put_user(env->regs[4], &sc->regs.r4);
3488 __put_user(env->regs[5], &sc->regs.r5);
3489 __put_user(env->regs[6], &sc->regs.r6);
3490 __put_user(env->regs[7], &sc->regs.r7);
3491 __put_user(env->regs[8], &sc->regs.r8);
3492 __put_user(env->regs[9], &sc->regs.r9);
3493 __put_user(env->regs[10], &sc->regs.r10);
3494 __put_user(env->regs[11], &sc->regs.r11);
3495 __put_user(env->regs[12], &sc->regs.r12);
3496 __put_user(env->regs[13], &sc->regs.r13);
3497 __put_user(env->regs[14], &sc->usp);
3498 __put_user(env->regs[15], &sc->regs.acr);
3499 __put_user(env->pregs[PR_MOF], &sc->regs.mof);
3500 __put_user(env->pregs[PR_SRP], &sc->regs.srp);
3501 __put_user(env->pc, &sc->regs.erp);
3502 }
3503
3504 static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env)
3505 {
3506 __get_user(env->regs[0], &sc->regs.r0);
3507 __get_user(env->regs[1], &sc->regs.r1);
3508 __get_user(env->regs[2], &sc->regs.r2);
3509 __get_user(env->regs[3], &sc->regs.r3);
3510 __get_user(env->regs[4], &sc->regs.r4);
3511 __get_user(env->regs[5], &sc->regs.r5);
3512 __get_user(env->regs[6], &sc->regs.r6);
3513 __get_user(env->regs[7], &sc->regs.r7);
3514 __get_user(env->regs[8], &sc->regs.r8);
3515 __get_user(env->regs[9], &sc->regs.r9);
3516 __get_user(env->regs[10], &sc->regs.r10);
3517 __get_user(env->regs[11], &sc->regs.r11);
3518 __get_user(env->regs[12], &sc->regs.r12);
3519 __get_user(env->regs[13], &sc->regs.r13);
3520 __get_user(env->regs[14], &sc->usp);
3521 __get_user(env->regs[15], &sc->regs.acr);
3522 __get_user(env->pregs[PR_MOF], &sc->regs.mof);
3523 __get_user(env->pregs[PR_SRP], &sc->regs.srp);
3524 __get_user(env->pc, &sc->regs.erp);
3525 }
3526
3527 static abi_ulong get_sigframe(CPUState *env, int framesize)
3528 {
3529 abi_ulong sp;
3530 /* Align the stack downwards to 4. */
3531 sp = (env->regs[R_SP] & ~3);
3532 return sp - framesize;
3533 }
3534
3535 static void setup_frame(int sig, struct target_sigaction *ka,
3536 target_sigset_t *set, CPUState *env)
3537 {
3538 struct target_signal_frame *frame;
3539 abi_ulong frame_addr;
3540 int err = 0;
3541 int i;
3542
3543 frame_addr = get_sigframe(env, sizeof *frame);
3544 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3545 goto badframe;
3546
3547 /*
3548 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
3549 * use this trampoline anymore but it sets it up for GDB.
3550 * In QEMU, using the trampoline simplifies things a bit so we use it.
3551 *
3552 * This is movu.w __NR_sigreturn, r9; break 13;
3553 */
3554 err |= __put_user(0x9c5f, frame->retcode+0);
3555 err |= __put_user(TARGET_NR_sigreturn,
3556 frame->retcode+2);
3557 err |= __put_user(0xe93d, frame->retcode+4);
3558
3559 /* Save the mask. */
3560 err |= __put_user(set->sig[0], &frame->sc.oldmask);
3561 if (err)
3562 goto badframe;
3563
3564 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3565 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
3566 goto badframe;
3567 }
3568
3569 setup_sigcontext(&frame->sc, env);
3570
3571 /* Move the stack and setup the arguments for the handler. */
3572 env->regs[R_SP] = frame_addr;
3573 env->regs[10] = sig;
3574 env->pc = (unsigned long) ka->_sa_handler;
3575 /* Link SRP so the guest returns through the trampoline. */
3576 env->pregs[PR_SRP] = frame_addr + offsetof(typeof(*frame), retcode);
3577
3578 unlock_user_struct(frame, frame_addr, 1);
3579 return;
3580 badframe:
3581 unlock_user_struct(frame, frame_addr, 1);
3582 force_sig(TARGET_SIGSEGV);
3583 }
3584
3585 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3586 target_siginfo_t *info,
3587 target_sigset_t *set, CPUState *env)
3588 {
3589 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
3590 }
3591
3592 long do_sigreturn(CPUState *env)
3593 {
3594 struct target_signal_frame *frame;
3595 abi_ulong frame_addr;
3596 target_sigset_t target_set;
3597 sigset_t set;
3598 int i;
3599
3600 frame_addr = env->regs[R_SP];
3601 /* Make sure the guest isn't playing games. */
3602 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3603 goto badframe;
3604
3605 /* Restore blocked signals */
3606 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
3607 goto badframe;
3608 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3609 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3610 goto badframe;
3611 }
3612 target_to_host_sigset_internal(&set, &target_set);
3613 sigprocmask(SIG_SETMASK, &set, NULL);
3614
3615 restore_sigcontext(&frame->sc, env);
3616 unlock_user_struct(frame, frame_addr, 0);
3617 return env->regs[10];
3618 badframe:
3619 unlock_user_struct(frame, frame_addr, 0);
3620 force_sig(TARGET_SIGSEGV);
3621 }
3622
3623 long do_rt_sigreturn(CPUState *env)
3624 {
3625 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
3626 return -TARGET_ENOSYS;
3627 }
3628
3629 #elif defined(TARGET_S390X)
3630
3631 #define __NUM_GPRS 16
3632 #define __NUM_FPRS 16
3633 #define __NUM_ACRS 16
3634
3635 #define S390_SYSCALL_SIZE 2
3636 #define __SIGNAL_FRAMESIZE 160 /* FIXME: 31-bit mode -> 96 */
3637
3638 #define _SIGCONTEXT_NSIG 64
3639 #define _SIGCONTEXT_NSIG_BPW 64 /* FIXME: 31-bit mode -> 32 */
3640 #define _SIGCONTEXT_NSIG_WORDS (_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW)
3641 #define _SIGMASK_COPY_SIZE (sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS)
3642 #define PSW_ADDR_AMODE 0x0000000000000000UL /* 0x80000000UL for 31-bit */
3643 #define S390_SYSCALL_OPCODE ((uint16_t)0x0a00)
3644
3645 typedef struct {
3646 target_psw_t psw;
3647 target_ulong gprs[__NUM_GPRS];
3648 unsigned int acrs[__NUM_ACRS];
3649 } target_s390_regs_common;
3650
3651 typedef struct {
3652 unsigned int fpc;
3653 double fprs[__NUM_FPRS];
3654 } target_s390_fp_regs;
3655
3656 typedef struct {
3657 target_s390_regs_common regs;
3658 target_s390_fp_regs fpregs;
3659 } target_sigregs;
3660
3661 struct target_sigcontext {
3662 target_ulong oldmask[_SIGCONTEXT_NSIG_WORDS];
3663 target_sigregs *sregs;
3664 };
3665
3666 typedef struct {
3667 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
3668 struct target_sigcontext sc;
3669 target_sigregs sregs;
3670 int signo;
3671 uint8_t retcode[S390_SYSCALL_SIZE];
3672 } sigframe;
3673
3674 struct target_ucontext {
3675 target_ulong tuc_flags;
3676 struct target_ucontext *tuc_link;
3677 target_stack_t tuc_stack;
3678 target_sigregs tuc_mcontext;
3679 target_sigset_t tuc_sigmask; /* mask last for extensibility */
3680 };
3681
3682 typedef struct {
3683 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
3684 uint8_t retcode[S390_SYSCALL_SIZE];
3685 struct target_siginfo info;
3686 struct target_ucontext uc;
3687 } rt_sigframe;
3688
3689 static inline abi_ulong
3690 get_sigframe(struct target_sigaction *ka, CPUState *env, size_t frame_size)
3691 {
3692 abi_ulong sp;
3693
3694 /* Default to using normal stack */
3695 sp = env->regs[15];
3696
3697 /* This is the X/Open sanctioned signal stack switching. */
3698 if (ka->sa_flags & TARGET_SA_ONSTACK) {
3699 if (!sas_ss_flags(sp)) {
3700 sp = target_sigaltstack_used.ss_sp +
3701 target_sigaltstack_used.ss_size;
3702 }
3703 }
3704
3705 /* This is the legacy signal stack switching. */
3706 else if (/* FIXME !user_mode(regs) */ 0 &&
3707 !(ka->sa_flags & TARGET_SA_RESTORER) &&
3708 ka->sa_restorer) {
3709 sp = (abi_ulong) ka->sa_restorer;
3710 }
3711
3712 return (sp - frame_size) & -8ul;
3713 }
3714
3715 static void save_sigregs(CPUState *env, target_sigregs *sregs)
3716 {
3717 int i;
3718 //save_access_regs(current->thread.acrs); FIXME
3719
3720 /* Copy a 'clean' PSW mask to the user to avoid leaking
3721 information about whether PER is currently on. */
3722 __put_user(env->psw.mask, &sregs->regs.psw.mask);
3723 __put_user(env->psw.addr, &sregs->regs.psw.addr);
3724 for (i = 0; i < 16; i++) {
3725 __put_user(env->regs[i], &sregs->regs.gprs[i]);
3726 }
3727 for (i = 0; i < 16; i++) {
3728 __put_user(env->aregs[i], &sregs->regs.acrs[i]);
3729 }
3730 /*
3731 * We have to store the fp registers to current->thread.fp_regs
3732 * to merge them with the emulated registers.
3733 */
3734 //save_fp_regs(&current->thread.fp_regs); FIXME
3735 for (i = 0; i < 16; i++) {
3736 __put_user(env->fregs[i].ll, &sregs->fpregs.fprs[i]);
3737 }
3738 }
3739
3740 static void setup_frame(int sig, struct target_sigaction *ka,
3741 target_sigset_t *set, CPUState *env)
3742 {
3743 sigframe *frame;
3744 abi_ulong frame_addr;
3745
3746 frame_addr = get_sigframe(ka, env, sizeof(*frame));
3747 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
3748 (unsigned long long)frame_addr);
3749 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3750 goto give_sigsegv;
3751 }
3752
3753 qemu_log("%s: 1\n", __FUNCTION__);
3754 if (__put_user(set->sig[0], &frame->sc.oldmask[0])) {
3755 goto give_sigsegv;
3756 }
3757
3758 save_sigregs(env, &frame->sregs);
3759
3760 __put_user((abi_ulong)(unsigned long)&frame->sregs,
3761 (abi_ulong *)&frame->sc.sregs);
3762
3763 /* Set up to return from userspace. If provided, use a stub
3764 already in userspace. */
3765 if (ka->sa_flags & TARGET_SA_RESTORER) {
3766 env->regs[14] = (unsigned long)
3767 ka->sa_restorer | PSW_ADDR_AMODE;
3768 } else {
3769 env->regs[14] = (unsigned long)
3770 frame->retcode | PSW_ADDR_AMODE;
3771 if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn,
3772 (uint16_t *)(frame->retcode)))
3773 goto give_sigsegv;
3774 }
3775
3776 /* Set up backchain. */
3777 if (__put_user(env->regs[15], (abi_ulong *) frame)) {
3778 goto give_sigsegv;
3779 }
3780
3781 /* Set up registers for signal handler */
3782 env->regs[15] = frame_addr;
3783 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
3784
3785 env->regs[2] = sig; //map_signal(sig);
3786 env->regs[3] = frame_addr += offsetof(typeof(*frame), sc);
3787
3788 /* We forgot to include these in the sigcontext.
3789 To avoid breaking binary compatibility, they are passed as args. */
3790 env->regs[4] = 0; // FIXME: no clue... current->thread.trap_no;
3791 env->regs[5] = 0; // FIXME: no clue... current->thread.prot_addr;
3792
3793 /* Place signal number on stack to allow backtrace from handler. */
3794 if (__put_user(env->regs[2], (int *) &frame->signo)) {
3795 goto give_sigsegv;
3796 }
3797 unlock_user_struct(frame, frame_addr, 1);
3798 return;
3799
3800 give_sigsegv:
3801 qemu_log("%s: give_sigsegv\n", __FUNCTION__);
3802 unlock_user_struct(frame, frame_addr, 1);
3803 force_sig(TARGET_SIGSEGV);
3804 }
3805
3806 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3807 target_siginfo_t *info,
3808 target_sigset_t *set, CPUState *env)
3809 {
3810 int i;
3811 rt_sigframe *frame;
3812 abi_ulong frame_addr;
3813
3814 frame_addr = get_sigframe(ka, env, sizeof *frame);
3815 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
3816 (unsigned long long)frame_addr);
3817 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3818 goto give_sigsegv;
3819 }
3820
3821 qemu_log("%s: 1\n", __FUNCTION__);
3822 if (copy_siginfo_to_user(&frame->info, info)) {
3823 goto give_sigsegv;
3824 }
3825
3826 /* Create the ucontext. */
3827 __put_user(0, &frame->uc.tuc_flags);
3828 __put_user((abi_ulong)0, (abi_ulong *)&frame->uc.tuc_link);
3829 __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
3830 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
3831 &frame->uc.tuc_stack.ss_flags);
3832 __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size);
3833 save_sigregs(env, &frame->uc.tuc_mcontext);
3834 for (i = 0; i < TARGET_NSIG_WORDS; i++) {
3835 __put_user((abi_ulong)set->sig[i],
3836 (abi_ulong *)&frame->uc.tuc_sigmask.sig[i]);
3837 }
3838
3839 /* Set up to return from userspace. If provided, use a stub
3840 already in userspace. */
3841 if (ka->sa_flags & TARGET_SA_RESTORER) {
3842 env->regs[14] = (unsigned long) ka->sa_restorer | PSW_ADDR_AMODE;
3843 } else {
3844 env->regs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE;
3845 if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn,
3846 (uint16_t *)(frame->retcode))) {
3847 goto give_sigsegv;
3848 }
3849 }
3850
3851 /* Set up backchain. */
3852 if (__put_user(env->regs[15], (abi_ulong *) frame)) {
3853 goto give_sigsegv;
3854 }
3855
3856 /* Set up registers for signal handler */
3857 env->regs[15] = frame_addr;
3858 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
3859
3860 env->regs[2] = sig; //map_signal(sig);
3861 env->regs[3] = frame_addr + offsetof(typeof(*frame), info);
3862 env->regs[4] = frame_addr + offsetof(typeof(*frame), uc);
3863 return;
3864
3865 give_sigsegv:
3866 qemu_log("%s: give_sigsegv\n", __FUNCTION__);
3867 unlock_user_struct(frame, frame_addr, 1);
3868 force_sig(TARGET_SIGSEGV);
3869 }
3870
3871 static int
3872 restore_sigregs(CPUState *env, target_sigregs *sc)
3873 {
3874 int err = 0;
3875 int i;
3876
3877 for (i = 0; i < 16; i++) {
3878 err |= __get_user(env->regs[i], &sc->regs.gprs[i]);
3879 }
3880
3881 err |= __get_user(env->psw.mask, &sc->regs.psw.mask);
3882 qemu_log("%s: sc->regs.psw.addr 0x%llx env->psw.addr 0x%llx\n",
3883 __FUNCTION__, (unsigned long long)sc->regs.psw.addr,
3884 (unsigned long long)env->psw.addr);
3885 err |= __get_user(env->psw.addr, &sc->regs.psw.addr);
3886 /* FIXME: 31-bit -> | PSW_ADDR_AMODE */
3887
3888 for (i = 0; i < 16; i++) {
3889 err |= __get_user(env->aregs[i], &sc->regs.acrs[i]);
3890 }
3891 for (i = 0; i < 16; i++) {
3892 err |= __get_user(env->fregs[i].ll, &sc->fpregs.fprs[i]);
3893 }
3894
3895 return err;
3896 }
3897
3898 long do_sigreturn(CPUState *env)
3899 {
3900 sigframe *frame;
3901 abi_ulong frame_addr = env->regs[15];
3902 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
3903 (unsigned long long)frame_addr);
3904 target_sigset_t target_set;
3905 sigset_t set;
3906
3907 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
3908 goto badframe;
3909 }
3910 if (__get_user(target_set.sig[0], &frame->sc.oldmask[0])) {
3911 goto badframe;
3912 }
3913
3914 target_to_host_sigset_internal(&set, &target_set);
3915 sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */
3916
3917 if (restore_sigregs(env, &frame->sregs)) {
3918 goto badframe;
3919 }
3920
3921 unlock_user_struct(frame, frame_addr, 0);
3922 return env->regs[2];
3923
3924 badframe:
3925 unlock_user_struct(frame, frame_addr, 0);
3926 force_sig(TARGET_SIGSEGV);
3927 return 0;
3928 }
3929
3930 long do_rt_sigreturn(CPUState *env)
3931 {
3932 rt_sigframe *frame;
3933 abi_ulong frame_addr = env->regs[15];
3934 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
3935 (unsigned long long)frame_addr);
3936 sigset_t set;
3937
3938 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
3939 goto badframe;
3940 }
3941 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
3942
3943 sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */
3944
3945 if (restore_sigregs(env, &frame->uc.tuc_mcontext)) {
3946 goto badframe;
3947 }
3948
3949 if (do_sigaltstack(frame_addr + offsetof(rt_sigframe, uc.tuc_stack), 0,
3950 get_sp_from_cpustate(env)) == -EFAULT) {
3951 goto badframe;
3952 }
3953 unlock_user_struct(frame, frame_addr, 0);
3954 return env->regs[2];
3955
3956 badframe:
3957 unlock_user_struct(frame, frame_addr, 0);
3958 force_sig(TARGET_SIGSEGV);
3959 return 0;
3960 }
3961
3962 #elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
3963
3964 /* FIXME: Many of the structures are defined for both PPC and PPC64, but
3965 the signal handling is different enough that we haven't implemented
3966 support for PPC64 yet. Hence the restriction above.
3967
3968 There are various #if'd blocks for code for TARGET_PPC64. These
3969 blocks should go away so that we can successfully run 32-bit and
3970 64-bit binaries on a QEMU configured for PPC64. */
3971
3972 /* Size of dummy stack frame allocated when calling signal handler.
3973 See arch/powerpc/include/asm/ptrace.h. */
3974 #if defined(TARGET_PPC64)
3975 #define SIGNAL_FRAMESIZE 128
3976 #else
3977 #define SIGNAL_FRAMESIZE 64
3978 #endif
3979
3980 /* See arch/powerpc/include/asm/sigcontext.h. */
3981 struct target_sigcontext {
3982 target_ulong _unused[4];
3983 int32_t signal;
3984 #if defined(TARGET_PPC64)
3985 int32_t pad0;
3986 #endif
3987 target_ulong handler;
3988 target_ulong oldmask;
3989 target_ulong regs; /* struct pt_regs __user * */
3990 /* TODO: PPC64 includes extra bits here. */
3991 };
3992
3993 /* Indices for target_mcontext.mc_gregs, below.
3994 See arch/powerpc/include/asm/ptrace.h for details. */
3995 enum {
3996 TARGET_PT_R0 = 0,
3997 TARGET_PT_R1 = 1,
3998 TARGET_PT_R2 = 2,
3999 TARGET_PT_R3 = 3,
4000 TARGET_PT_R4 = 4,
4001 TARGET_PT_R5 = 5,
4002 TARGET_PT_R6 = 6,
4003 TARGET_PT_R7 = 7,
4004 TARGET_PT_R8 = 8,
4005 TARGET_PT_R9 = 9,
4006 TARGET_PT_R10 = 10,
4007 TARGET_PT_R11 = 11,
4008 TARGET_PT_R12 = 12,
4009 TARGET_PT_R13 = 13,
4010 TARGET_PT_R14 = 14,
4011 TARGET_PT_R15 = 15,
4012 TARGET_PT_R16 = 16,
4013 TARGET_PT_R17 = 17,
4014 TARGET_PT_R18 = 18,
4015 TARGET_PT_R19 = 19,
4016 TARGET_PT_R20 = 20,
4017 TARGET_PT_R21 = 21,
4018 TARGET_PT_R22 = 22,
4019 TARGET_PT_R23 = 23,
4020 TARGET_PT_R24 = 24,
4021 TARGET_PT_R25 = 25,
4022 TARGET_PT_R26 = 26,
4023 TARGET_PT_R27 = 27,
4024 TARGET_PT_R28 = 28,
4025 TARGET_PT_R29 = 29,
4026 TARGET_PT_R30 = 30,
4027 TARGET_PT_R31 = 31,
4028 TARGET_PT_NIP = 32,
4029 TARGET_PT_MSR = 33,
4030 TARGET_PT_ORIG_R3 = 34,
4031 TARGET_PT_CTR = 35,
4032 TARGET_PT_LNK = 36,
4033 TARGET_PT_XER = 37,
4034 TARGET_PT_CCR = 38,
4035 /* Yes, there are two registers with #39. One is 64-bit only. */
4036 TARGET_PT_MQ = 39,
4037 TARGET_PT_SOFTE = 39,
4038 TARGET_PT_TRAP = 40,
4039 TARGET_PT_DAR = 41,
4040 TARGET_PT_DSISR = 42,
4041 TARGET_PT_RESULT = 43,
4042 TARGET_PT_REGS_COUNT = 44
4043 };
4044
4045 /* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC;
4046 on 64-bit PPC, sigcontext and mcontext are one and the same. */
4047 struct target_mcontext {
4048 target_ulong mc_gregs[48];
4049 /* Includes fpscr. */
4050 uint64_t mc_fregs[33];
4051 target_ulong mc_pad[2];
4052 /* We need to handle Altivec and SPE at the same time, which no
4053 kernel needs to do. Fortunately, the kernel defines this bit to
4054 be Altivec-register-large all the time, rather than trying to
4055 twiddle it based on the specific platform. */
4056 union {
4057 /* SPE vector registers. One extra for SPEFSCR. */
4058 uint32_t spe[33];
4059 /* Altivec vector registers. The packing of VSCR and VRSAVE
4060 varies depending on whether we're PPC64 or not: PPC64 splits
4061 them apart; PPC32 stuffs them together. */
4062 #if defined(TARGET_PPC64)
4063 #define QEMU_NVRREG 34
4064 #else
4065 #define QEMU_NVRREG 33
4066 #endif
4067 ppc_avr_t altivec[QEMU_NVRREG];
4068 #undef QEMU_NVRREG
4069 } mc_vregs __attribute__((__aligned__(16)));
4070 };
4071
4072 struct target_ucontext {
4073 target_ulong tuc_flags;
4074 target_ulong tuc_link; /* struct ucontext __user * */
4075 struct target_sigaltstack tuc_stack;
4076 #if !defined(TARGET_PPC64)
4077 int32_t tuc_pad[7];
4078 target_ulong tuc_regs; /* struct mcontext __user *
4079 points to uc_mcontext field */
4080 #endif
4081 target_sigset_t tuc_sigmask;
4082 #if defined(TARGET_PPC64)
4083 target_sigset_t unused[15]; /* Allow for uc_sigmask growth */
4084 struct target_sigcontext tuc_mcontext;
4085 #else
4086 int32_t tuc_maskext[30];
4087 int32_t tuc_pad2[3];
4088 struct target_mcontext tuc_mcontext;
4089 #endif
4090 };
4091
4092 /* See arch/powerpc/kernel/signal_32.c. */
4093 struct target_sigframe {
4094 struct target_sigcontext sctx;
4095 struct target_mcontext mctx;
4096 int32_t abigap[56];
4097 };
4098
4099 struct target_rt_sigframe {
4100 struct target_siginfo info;
4101 struct target_ucontext uc;
4102 int32_t abigap[56];
4103 };
4104
4105 /* We use the mc_pad field for the signal return trampoline. */
4106 #define tramp mc_pad
4107
4108 /* See arch/powerpc/kernel/signal.c. */
4109 static target_ulong get_sigframe(struct target_sigaction *ka,
4110 CPUState *env,
4111 int frame_size)
4112 {
4113 target_ulong oldsp, newsp;
4114
4115 oldsp = env->gpr[1];
4116
4117 if ((ka->sa_flags & TARGET_SA_ONSTACK) &&
4118 (sas_ss_flags(oldsp))) {
4119 oldsp = (target_sigaltstack_used.ss_sp
4120 + target_sigaltstack_used.ss_size);
4121 }
4122
4123 newsp = (oldsp - frame_size) & ~0xFUL;
4124
4125 return newsp;
4126 }
4127
4128 static int save_user_regs(CPUState *env, struct target_mcontext *frame,
4129 int sigret)
4130 {
4131 target_ulong msr = env->msr;
4132 int i;
4133 target_ulong ccr = 0;
4134
4135 /* In general, the kernel attempts to be intelligent about what it
4136 needs to save for Altivec/FP/SPE registers. We don't care that
4137 much, so we just go ahead and save everything. */
4138
4139 /* Save general registers. */
4140 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4141 if (__put_user(env->gpr[i], &frame->mc_gregs[i])) {
4142 return 1;
4143 }
4144 }
4145 if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
4146 || __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
4147 || __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
4148 || __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
4149 return 1;
4150
4151 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
4152 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
4153 }
4154 if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
4155 return 1;
4156
4157 /* Save Altivec registers if necessary. */
4158 if (env->insns_flags & PPC_ALTIVEC) {
4159 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
4160 ppc_avr_t *avr = &env->avr[i];
4161 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
4162
4163 if (__put_user(avr->u64[0], &vreg->u64[0]) ||
4164 __put_user(avr->u64[1], &vreg->u64[1])) {
4165 return 1;
4166 }
4167 }
4168 /* Set MSR_VR in the saved MSR value to indicate that
4169 frame->mc_vregs contains valid data. */
4170 msr |= MSR_VR;
4171 if (__put_user((uint32_t)env->spr[SPR_VRSAVE],
4172 &frame->mc_vregs.altivec[32].u32[3]))
4173 return 1;
4174 }
4175
4176 /* Save floating point registers. */
4177 if (env->insns_flags & PPC_FLOAT) {
4178 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
4179 if (__put_user(env->fpr[i], &frame->mc_fregs[i])) {
4180 return 1;
4181 }
4182 }
4183 if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32]))
4184 return 1;
4185 }
4186
4187 /* Save SPE registers. The kernel only saves the high half. */
4188 if (env->insns_flags & PPC_SPE) {
4189 #if defined(TARGET_PPC64)
4190 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4191 if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) {
4192 return 1;
4193 }
4194 }
4195 #else
4196 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
4197 if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
4198 return 1;
4199 }
4200 }
4201 #endif
4202 /* Set MSR_SPE in the saved MSR value to indicate that
4203 frame->mc_vregs contains valid data. */
4204 msr |= MSR_SPE;
4205 if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
4206 return 1;
4207 }
4208
4209 /* Store MSR. */
4210 if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
4211 return 1;
4212
4213 /* Set up the sigreturn trampoline: li r0,sigret; sc. */
4214 if (sigret) {
4215 if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) ||
4216 __put_user(0x44000002UL, &frame->tramp[1])) {
4217 return 1;
4218 }
4219 }
4220
4221 return 0;
4222 }
4223
4224 static int restore_user_regs(CPUState *env,
4225 struct target_mcontext *frame, int sig)
4226 {
4227 target_ulong save_r2 = 0;
4228 target_ulong msr;
4229 target_ulong ccr;
4230
4231 int i;
4232
4233 if (!sig) {
4234 save_r2 = env->gpr[2];
4235 }
4236
4237 /* Restore general registers. */
4238 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4239 if (__get_user(env->gpr[i], &frame->mc_gregs[i])) {
4240 return 1;
4241 }
4242 }
4243 if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
4244 || __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
4245 || __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
4246 || __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
4247 return 1;
4248 if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
4249 return 1;
4250
4251 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
4252 env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf;
4253 }
4254
4255 if (!sig) {
4256 env->gpr[2] = save_r2;
4257 }
4258 /* Restore MSR. */
4259 if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
4260 return 1;
4261
4262 /* If doing signal return, restore the previous little-endian mode. */
4263 if (sig)
4264 env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE);
4265
4266 /* Restore Altivec registers if necessary. */
4267 if (env->insns_flags & PPC_ALTIVEC) {
4268 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
4269 ppc_avr_t *avr = &env->avr[i];
4270 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
4271
4272 if (__get_user(avr->u64[0], &vreg->u64[0]) ||
4273 __get_user(avr->u64[1], &vreg->u64[1])) {
4274 return 1;
4275 }
4276 }
4277 /* Set MSR_VEC in the saved MSR value to indicate that
4278 frame->mc_vregs contains valid data. */
4279 if (__get_user(env->spr[SPR_VRSAVE],
4280 (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3])))
4281 return 1;
4282 }
4283
4284 /* Restore floating point registers. */
4285 if (env->insns_flags & PPC_FLOAT) {
4286 uint64_t fpscr;
4287 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
4288 if (__get_user(env->fpr[i], &frame->mc_fregs[i])) {
4289 return 1;
4290 }
4291 }
4292 if (__get_user(fpscr, &frame->mc_fregs[32]))
4293 return 1;
4294 env->fpscr = (uint32_t) fpscr;
4295 }
4296
4297 /* Save SPE registers. The kernel only saves the high half. */
4298 if (env->insns_flags & PPC_SPE) {
4299 #if defined(TARGET_PPC64)
4300 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4301 uint32_t hi;
4302
4303 if (__get_user(hi, &frame->mc_vregs.spe[i])) {
4304 return 1;
4305 }
4306 env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
4307 }
4308 #else
4309 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
4310 if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
4311 return 1;
4312 }
4313 }
4314 #endif
4315 if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
4316 return 1;
4317 }
4318
4319 return 0;
4320 }
4321
4322 static void setup_frame(int sig, struct target_sigaction *ka,
4323 target_sigset_t *set, CPUState *env)
4324 {
4325 struct target_sigframe *frame;
4326 struct target_sigcontext *sc;
4327 target_ulong frame_addr, newsp;
4328 int err = 0;
4329 int signal;
4330
4331 frame_addr = get_sigframe(ka, env, sizeof(*frame));
4332 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
4333 goto sigsegv;
4334 sc = &frame->sctx;
4335
4336 signal = current_exec_domain_sig(sig);
4337
4338 err |= __put_user(h2g(ka->_sa_handler), &sc->handler);
4339 err |= __put_user(set->sig[0], &sc->oldmask);
4340 #if defined(TARGET_PPC64)
4341 err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]);
4342 #else
4343 err |= __put_user(set->sig[1], &sc->_unused[3]);
4344 #endif
4345 err |= __put_user(h2g(&frame->mctx), &sc->regs);
4346 err |= __put_user(sig, &sc->signal);
4347
4348 /* Save user regs. */
4349 err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn);
4350
4351 /* The kernel checks for the presence of a VDSO here. We don't
4352 emulate a vdso, so use a sigreturn system call. */
4353 env->lr = (target_ulong) h2g(frame->mctx.tramp);
4354
4355 /* Turn off all fp exceptions. */
4356 env->fpscr = 0;
4357
4358 /* Create a stack frame for the caller of the handler. */
4359 newsp = frame_addr - SIGNAL_FRAMESIZE;
4360 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
4361
4362 if (err)
4363 goto sigsegv;
4364
4365 /* Set up registers for signal handler. */
4366 env->gpr[1] = newsp;
4367 env->gpr[3] = signal;
4368 env->gpr[4] = (target_ulong) h2g(sc);
4369 env->nip = (target_ulong) ka->_sa_handler;
4370 /* Signal handlers are entered in big-endian mode. */
4371 env->msr &= ~MSR_LE;
4372
4373 unlock_user_struct(frame, frame_addr, 1);
4374 return;
4375
4376 sigsegv:
4377 unlock_user_struct(frame, frame_addr, 1);
4378 if (logfile)
4379 fprintf (logfile, "segfaulting from setup_frame\n");
4380 force_sig(TARGET_SIGSEGV);
4381 }
4382
4383 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4384 target_siginfo_t *info,
4385 target_sigset_t *set, CPUState *env)
4386 {
4387 struct target_rt_sigframe *rt_sf;
4388 struct target_mcontext *frame;
4389 target_ulong rt_sf_addr, newsp = 0;
4390 int i, err = 0;
4391 int signal;
4392
4393 rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
4394 if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1))
4395 goto sigsegv;
4396
4397 signal = current_exec_domain_sig(sig);
4398
4399 err |= copy_siginfo_to_user(&rt_sf->info, info);
4400
4401 err |= __put_user(0, &rt_sf->uc.tuc_flags);
4402 err |= __put_user(0, &rt_sf->uc.tuc_link);
4403 err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp,
4404 &rt_sf->uc.tuc_stack.ss_sp);
4405 err |= __put_user(sas_ss_flags(env->gpr[1]),
4406 &rt_sf->uc.tuc_stack.ss_flags);
4407 err |= __put_user(target_sigaltstack_used.ss_size,
4408 &rt_sf->uc.tuc_stack.ss_size);
4409 err |= __put_user(h2g (&rt_sf->uc.tuc_mcontext),
4410 &rt_sf->uc.tuc_regs);
4411 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
4412 err |= __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]);
4413 }
4414
4415 frame = &rt_sf->uc.tuc_mcontext;
4416 err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn);
4417
4418 /* The kernel checks for the presence of a VDSO here. We don't
4419 emulate a vdso, so use a sigreturn system call. */
4420 env->lr = (target_ulong) h2g(frame->tramp);
4421
4422 /* Turn off all fp exceptions. */
4423 env->fpscr = 0;
4424
4425 /* Create a stack frame for the caller of the handler. */
4426 newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
4427 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
4428
4429 if (err)
4430 goto sigsegv;
4431
4432 /* Set up registers for signal handler. */
4433 env->gpr[1] = newsp;
4434 env->gpr[3] = (target_ulong) signal;
4435 env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
4436 env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
4437 env->gpr[6] = (target_ulong) h2g(rt_sf);
4438 env->nip = (target_ulong) ka->_sa_handler;
4439 /* Signal handlers are entered in big-endian mode. */
4440 env->msr &= ~MSR_LE;
4441
4442 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4443 return;
4444
4445 sigsegv:
4446 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4447 if (logfile)
4448 fprintf (logfile, "segfaulting from setup_rt_frame\n");
4449 force_sig(TARGET_SIGSEGV);
4450
4451 }
4452
4453 long do_sigreturn(CPUState *env)
4454 {
4455 struct target_sigcontext *sc = NULL;
4456 struct target_mcontext *sr = NULL;
4457 target_ulong sr_addr, sc_addr;
4458 sigset_t blocked;
4459 target_sigset_t set;
4460
4461 sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
4462 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1))
4463 goto sigsegv;
4464
4465 #if defined(TARGET_PPC64)
4466 set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32);
4467 #else
4468 if(__get_user(set.sig[0], &sc->oldmask) ||
4469 __get_user(set.sig[1], &sc->_unused[3]))
4470 goto sigsegv;
4471 #endif
4472 target_to_host_sigset_internal(&blocked, &set);
4473 sigprocmask(SIG_SETMASK, &blocked, NULL);
4474
4475 if (__get_user(sr_addr, &sc->regs))
4476 goto sigsegv;
4477 if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1))
4478 goto sigsegv;
4479 if (restore_user_regs(env, sr, 1))
4480 goto sigsegv;
4481
4482 unlock_user_struct(sr, sr_addr, 1);
4483 unlock_user_struct(sc, sc_addr, 1);
4484 return -TARGET_QEMU_ESIGRETURN;
4485
4486 sigsegv:
4487 unlock_user_struct(sr, sr_addr, 1);
4488 unlock_user_struct(sc, sc_addr, 1);
4489 if (logfile)
4490 fprintf (logfile, "segfaulting from do_sigreturn\n");
4491 force_sig(TARGET_SIGSEGV);
4492 return 0;
4493 }
4494
4495 /* See arch/powerpc/kernel/signal_32.c. */
4496 static int do_setcontext(struct target_ucontext *ucp, CPUState *env, int sig)
4497 {
4498 struct target_mcontext *mcp;
4499 target_ulong mcp_addr;
4500 sigset_t blocked;
4501 target_sigset_t set;
4502
4503 if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask),
4504 sizeof (set)))
4505 return 1;
4506
4507 #if defined(TARGET_PPC64)
4508 fprintf (stderr, "do_setcontext: not implemented\n");
4509 return 0;
4510 #else
4511 if (__get_user(mcp_addr, &ucp->tuc_regs))
4512 return 1;
4513
4514 if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1))
4515 return 1;
4516
4517 target_to_host_sigset_internal(&blocked, &set);
4518 sigprocmask(SIG_SETMASK, &blocked, NULL);
4519 if (restore_user_regs(env, mcp, sig))
4520 goto sigsegv;
4521
4522 unlock_user_struct(mcp, mcp_addr, 1);
4523 return 0;
4524
4525 sigsegv:
4526 unlock_user_struct(mcp, mcp_addr, 1);
4527 return 1;
4528 #endif
4529 }
4530
4531 long do_rt_sigreturn(CPUState *env)
4532 {
4533 struct target_rt_sigframe *rt_sf = NULL;
4534 target_ulong rt_sf_addr;
4535
4536 rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16;
4537 if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1))
4538 goto sigsegv;
4539
4540 if (do_setcontext(&rt_sf->uc, env, 1))
4541 goto sigsegv;
4542
4543 do_sigaltstack(rt_sf_addr
4544 + offsetof(struct target_rt_sigframe, uc.tuc_stack),
4545 0, env->gpr[1]);
4546
4547 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4548 return -TARGET_QEMU_ESIGRETURN;
4549
4550 sigsegv:
4551 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4552 if (logfile)
4553 fprintf (logfile, "segfaulting from do_rt_sigreturn\n");
4554 force_sig(TARGET_SIGSEGV);
4555 return 0;
4556 }
4557
4558 #elif defined(TARGET_M68K)
4559
4560 struct target_sigcontext {
4561 abi_ulong sc_mask;
4562 abi_ulong sc_usp;
4563 abi_ulong sc_d0;
4564 abi_ulong sc_d1;
4565 abi_ulong sc_a0;
4566 abi_ulong sc_a1;
4567 unsigned short sc_sr;
4568 abi_ulong sc_pc;
4569 };
4570
4571 struct target_sigframe
4572 {
4573 abi_ulong pretcode;
4574 int sig;
4575 int code;
4576 abi_ulong psc;
4577 char retcode[8];
4578 abi_ulong extramask[TARGET_NSIG_WORDS-1];
4579 struct target_sigcontext sc;
4580 };
4581
4582 typedef int target_greg_t;
4583 #define TARGET_NGREG 18
4584 typedef target_greg_t target_gregset_t[TARGET_NGREG];
4585
4586 typedef struct target_fpregset {
4587 int f_fpcntl[3];
4588 int f_fpregs[8*3];
4589 } target_fpregset_t;
4590
4591 struct target_mcontext {
4592 int version;
4593 target_gregset_t gregs;
4594 target_fpregset_t fpregs;
4595 };
4596
4597 #define TARGET_MCONTEXT_VERSION 2
4598
4599 struct target_ucontext {
4600 abi_ulong tuc_flags;
4601 abi_ulong tuc_link;
4602 target_stack_t tuc_stack;
4603 struct target_mcontext tuc_mcontext;
4604 abi_long tuc_filler[80];
4605 target_sigset_t tuc_sigmask;
4606 };
4607
4608 struct target_rt_sigframe
4609 {
4610 abi_ulong pretcode;
4611 int sig;
4612 abi_ulong pinfo;
4613 abi_ulong puc;
4614 char retcode[8];
4615 struct target_siginfo info;
4616 struct target_ucontext uc;
4617 };
4618
4619 static int
4620 setup_sigcontext(struct target_sigcontext *sc, CPUState *env, abi_ulong mask)
4621 {
4622 int err = 0;
4623
4624 err |= __put_user(mask, &sc->sc_mask);
4625 err |= __put_user(env->aregs[7], &sc->sc_usp);
4626 err |= __put_user(env->dregs[0], &sc->sc_d0);
4627 err |= __put_user(env->dregs[1], &sc->sc_d1);
4628 err |= __put_user(env->aregs[0], &sc->sc_a0);
4629 err |= __put_user(env->aregs[1], &sc->sc_a1);
4630 err |= __put_user(env->sr, &sc->sc_sr);
4631 err |= __put_user(env->pc, &sc->sc_pc);
4632
4633 return err;
4634 }
4635
4636 static int
4637 restore_sigcontext(CPUState *env, struct target_sigcontext *sc, int *pd0)
4638 {
4639 int err = 0;
4640 int temp;
4641
4642 err |= __get_user(env->aregs[7], &sc->sc_usp);
4643 err |= __get_user(env->dregs[1], &sc->sc_d1);
4644 err |= __get_user(env->aregs[0], &sc->sc_a0);
4645 err |= __get_user(env->aregs[1], &sc->sc_a1);
4646 err |= __get_user(env->pc, &sc->sc_pc);
4647 err |= __get_user(temp, &sc->sc_sr);
4648 env->sr = (env->sr & 0xff00) | (temp & 0xff);
4649
4650 *pd0 = tswapl(sc->sc_d0);
4651
4652 return err;
4653 }
4654
4655 /*
4656 * Determine which stack to use..
4657 */
4658 static inline abi_ulong
4659 get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
4660 {
4661 unsigned long sp;
4662
4663 sp = regs->aregs[7];
4664
4665 /* This is the X/Open sanctioned signal stack switching. */
4666 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
4667 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
4668 }
4669
4670 return ((sp - frame_size) & -8UL);
4671 }
4672
4673 static void setup_frame(int sig, struct target_sigaction *ka,
4674 target_sigset_t *set, CPUState *env)
4675 {
4676 struct target_sigframe *frame;
4677 abi_ulong frame_addr;
4678 abi_ulong retcode_addr;
4679 abi_ulong sc_addr;
4680 int err = 0;
4681 int i;
4682
4683 frame_addr = get_sigframe(ka, env, sizeof *frame);
4684 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
4685 goto give_sigsegv;
4686
4687 err |= __put_user(sig, &frame->sig);
4688
4689 sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
4690 err |= __put_user(sc_addr, &frame->psc);
4691
4692 err |= setup_sigcontext(&frame->sc, env, set->sig[0]);
4693 if (err)
4694 goto give_sigsegv;
4695
4696 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
4697 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
4698 goto give_sigsegv;
4699 }
4700
4701 /* Set up to return from userspace. */
4702
4703 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
4704 err |= __put_user(retcode_addr, &frame->pretcode);
4705
4706 /* moveq #,d0; trap #0 */
4707
4708 err |= __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16),
4709 (long *)(frame->retcode));
4710
4711 if (err)
4712 goto give_sigsegv;
4713
4714 /* Set up to return from userspace */
4715
4716 env->aregs[7] = frame_addr;
4717 env->pc = ka->_sa_handler;
4718
4719 unlock_user_struct(frame, frame_addr, 1);
4720 return;
4721
4722 give_sigsegv:
4723 unlock_user_struct(frame, frame_addr, 1);
4724 force_sig(TARGET_SIGSEGV);
4725 }
4726
4727 static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
4728 CPUState *env)
4729 {
4730 target_greg_t *gregs = uc->tuc_mcontext.gregs;
4731 int err;
4732
4733 err = __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version);
4734 err |= __put_user(env->dregs[0], &gregs[0]);
4735 err |= __put_user(env->dregs[1], &gregs[1]);
4736 err |= __put_user(env->dregs[2], &gregs[2]);
4737 err |= __put_user(env->dregs[3], &gregs[3]);
4738 err |= __put_user(env->dregs[4], &gregs[4]);
4739 err |= __put_user(env->dregs[5], &gregs[5]);
4740 err |= __put_user(env->dregs[6], &gregs[6]);
4741 err |= __put_user(env->dregs[7], &gregs[7]);
4742 err |= __put_user(env->aregs[0], &gregs[8]);
4743 err |= __put_user(env->aregs[1], &gregs[9]);
4744 err |= __put_user(env->aregs[2], &gregs[10]);
4745 err |= __put_user(env->aregs[3], &gregs[11]);
4746 err |= __put_user(env->aregs[4], &gregs[12]);
4747 err |= __put_user(env->aregs[5], &gregs[13]);
4748 err |= __put_user(env->aregs[6], &gregs[14]);
4749 err |= __put_user(env->aregs[7], &gregs[15]);
4750 err |= __put_user(env->pc, &gregs[16]);
4751 err |= __put_user(env->sr, &gregs[17]);
4752
4753 return err;
4754 }
4755
4756 static inline int target_rt_restore_ucontext(CPUState *env,
4757 struct target_ucontext *uc,
4758 int *pd0)
4759 {
4760 int temp;
4761 int err;
4762 target_greg_t *gregs = uc->tuc_mcontext.gregs;
4763
4764 err = __get_user(temp, &uc->tuc_mcontext.version);
4765 if (temp != TARGET_MCONTEXT_VERSION)
4766 goto badframe;
4767
4768 /* restore passed registers */
4769 err |= __get_user(env->dregs[0], &gregs[0]);
4770 err |= __get_user(env->dregs[1], &gregs[1]);
4771 err |= __get_user(env->dregs[2], &gregs[2]);
4772 err |= __get_user(env->dregs[3], &gregs[3]);
4773 err |= __get_user(env->dregs[4], &gregs[4]);
4774 err |= __get_user(env->dregs[5], &gregs[5]);
4775 err |= __get_user(env->dregs[6], &gregs[6]);
4776 err |= __get_user(env->dregs[7], &gregs[7]);
4777 err |= __get_user(env->aregs[0], &gregs[8]);
4778 err |= __get_user(env->aregs[1], &gregs[9]);
4779 err |= __get_user(env->aregs[2], &gregs[10]);
4780 err |= __get_user(env->aregs[3], &gregs[11]);
4781 err |= __get_user(env->aregs[4], &gregs[12]);
4782 err |= __get_user(env->aregs[5], &gregs[13]);
4783 err |= __get_user(env->aregs[6], &gregs[14]);
4784 err |= __get_user(env->aregs[7], &gregs[15]);
4785 err |= __get_user(env->pc, &gregs[16]);
4786 err |= __get_user(temp, &gregs[17]);
4787 env->sr = (env->sr & 0xff00) | (temp & 0xff);
4788
4789 *pd0 = env->dregs[0];
4790 return err;
4791
4792 badframe:
4793 return 1;
4794 }
4795
4796 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4797 target_siginfo_t *info,
4798 target_sigset_t *set, CPUState *env)
4799 {
4800 struct target_rt_sigframe *frame;
4801 abi_ulong frame_addr;
4802 abi_ulong retcode_addr;
4803 abi_ulong info_addr;
4804 abi_ulong uc_addr;
4805 int err = 0;
4806 int i;
4807
4808 frame_addr = get_sigframe(ka, env, sizeof *frame);
4809 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
4810 goto give_sigsegv;
4811
4812 err |= __put_user(sig, &frame->sig);
4813
4814 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
4815 err |= __put_user(info_addr, &frame->pinfo);
4816
4817 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
4818 err |= __put_user(uc_addr, &frame->puc);
4819
4820 err |= copy_siginfo_to_user(&frame->info, info);
4821
4822 /* Create the ucontext */
4823
4824 err |= __put_user(0, &frame->uc.tuc_flags);
4825 err |= __put_user(0, &frame->uc.tuc_link);
4826 err |= __put_user(target_sigaltstack_used.ss_sp,
4827 &frame->uc.tuc_stack.ss_sp);
4828 err |= __put_user(sas_ss_flags(env->aregs[7]),
4829 &frame->uc.tuc_stack.ss_flags);
4830 err |= __put_user(target_sigaltstack_used.ss_size,
4831 &frame->uc.tuc_stack.ss_size);
4832 err |= target_rt_setup_ucontext(&frame->uc, env);
4833
4834 if (err)
4835 goto give_sigsegv;
4836
4837 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
4838 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
4839 goto give_sigsegv;
4840 }
4841
4842 /* Set up to return from userspace. */
4843
4844 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
4845 err |= __put_user(retcode_addr, &frame->pretcode);
4846
4847 /* moveq #,d0; notb d0; trap #0 */
4848
4849 err |= __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
4850 (long *)(frame->retcode + 0));
4851 err |= __put_user(0x4e40, (short *)(frame->retcode + 4));
4852
4853 if (err)
4854 goto give_sigsegv;
4855
4856 /* Set up to return from userspace */
4857
4858 env->aregs[7] = frame_addr;
4859 env->pc = ka->_sa_handler;
4860
4861 unlock_user_struct(frame, frame_addr, 1);
4862 return;
4863
4864 give_sigsegv:
4865 unlock_user_struct(frame, frame_addr, 1);
4866 force_sig(TARGET_SIGSEGV);
4867 }
4868
4869 long do_sigreturn(CPUState *env)
4870 {
4871 struct target_sigframe *frame;
4872 abi_ulong frame_addr = env->aregs[7] - 4;
4873 target_sigset_t target_set;
4874 sigset_t set;
4875 int d0, i;
4876
4877 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
4878 goto badframe;
4879
4880 /* set blocked signals */
4881
4882 if (__get_user(target_set.sig[0], &frame->sc.sc_mask))
4883 goto badframe;
4884
4885 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
4886 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
4887 goto badframe;
4888 }
4889
4890 target_to_host_sigset_internal(&set, &target_set);
4891 sigprocmask(SIG_SETMASK, &set, NULL);
4892
4893 /* restore registers */
4894
4895 if (restore_sigcontext(env, &frame->sc, &d0))
4896 goto badframe;
4897
4898 unlock_user_struct(frame, frame_addr, 0);
4899 return d0;
4900
4901 badframe:
4902 unlock_user_struct(frame, frame_addr, 0);
4903 force_sig(TARGET_SIGSEGV);
4904 return 0;
4905 }
4906
4907 long do_rt_sigreturn(CPUState *env)
4908 {
4909 struct target_rt_sigframe *frame;
4910 abi_ulong frame_addr = env->aregs[7] - 4;
4911 target_sigset_t target_set;
4912 sigset_t set;
4913 int d0;
4914
4915 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
4916 goto badframe;
4917
4918 target_to_host_sigset_internal(&set, &target_set);
4919 sigprocmask(SIG_SETMASK, &set, NULL);
4920
4921 /* restore registers */
4922
4923 if (target_rt_restore_ucontext(env, &frame->uc, &d0))
4924 goto badframe;
4925
4926 if (do_sigaltstack(frame_addr +
4927 offsetof(struct target_rt_sigframe, uc.tuc_stack),
4928 0, get_sp_from_cpustate(env)) == -EFAULT)
4929 goto badframe;
4930
4931 unlock_user_struct(frame, frame_addr, 0);
4932 return d0;
4933
4934 badframe:
4935 unlock_user_struct(frame, frame_addr, 0);
4936 force_sig(TARGET_SIGSEGV);
4937 return 0;
4938 }
4939
4940 #elif defined(TARGET_ALPHA)
4941
4942 struct target_sigcontext {
4943 abi_long sc_onstack;
4944 abi_long sc_mask;
4945 abi_long sc_pc;
4946 abi_long sc_ps;
4947 abi_long sc_regs[32];
4948 abi_long sc_ownedfp;
4949 abi_long sc_fpregs[32];
4950 abi_ulong sc_fpcr;
4951 abi_ulong sc_fp_control;
4952 abi_ulong sc_reserved1;
4953 abi_ulong sc_reserved2;
4954 abi_ulong sc_ssize;
4955 abi_ulong sc_sbase;
4956 abi_ulong sc_traparg_a0;
4957 abi_ulong sc_traparg_a1;
4958 abi_ulong sc_traparg_a2;
4959 abi_ulong sc_fp_trap_pc;
4960 abi_ulong sc_fp_trigger_sum;
4961 abi_ulong sc_fp_trigger_inst;
4962 };
4963
4964 struct target_ucontext {
4965 abi_ulong tuc_flags;
4966 abi_ulong tuc_link;
4967 abi_ulong tuc_osf_sigmask;
4968 target_stack_t tuc_stack;
4969 struct target_sigcontext tuc_mcontext;
4970 target_sigset_t tuc_sigmask;
4971 };
4972
4973 struct target_sigframe {
4974 struct target_sigcontext sc;
4975 unsigned int retcode[3];
4976 };
4977
4978 struct target_rt_sigframe {
4979 target_siginfo_t info;
4980 struct target_ucontext uc;
4981 unsigned int retcode[3];
4982 };
4983
4984 #define INSN_MOV_R30_R16 0x47fe0410
4985 #define INSN_LDI_R0 0x201f0000
4986 #define INSN_CALLSYS 0x00000083
4987
4988 static int setup_sigcontext(struct target_sigcontext *sc, CPUState *env,
4989 abi_ulong frame_addr, target_sigset_t *set)
4990 {
4991 int i, err = 0;
4992
4993 err |= __put_user(on_sig_stack(frame_addr), &sc->sc_onstack);
4994 err |= __put_user(set->sig[0], &sc->sc_mask);
4995 err |= __put_user(env->pc, &sc->sc_pc);
4996 err |= __put_user(8, &sc->sc_ps);
4997
4998 for (i = 0; i < 31; ++i) {
4999 err |= __put_user(env->ir[i], &sc->sc_regs[i]);
5000 }
5001 err |= __put_user(0, &sc->sc_regs[31]);
5002
5003 for (i = 0; i < 31; ++i) {
5004 err |= __put_user(env->fir[i], &sc->sc_fpregs[i]);
5005 }
5006 err |= __put_user(0, &sc->sc_fpregs[31]);
5007 err |= __put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr);
5008
5009 err |= __put_user(0, &sc->sc_traparg_a0); /* FIXME */
5010 err |= __put_user(0, &sc->sc_traparg_a1); /* FIXME */
5011 err |= __put_user(0, &sc->sc_traparg_a2); /* FIXME */
5012
5013 return err;
5014 }
5015
5016 static int restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
5017 {
5018 uint64_t fpcr;
5019 int i, err = 0;
5020
5021 err |= __get_user(env->pc, &sc->sc_pc);
5022
5023 for (i = 0; i < 31; ++i) {
5024 err |= __get_user(env->ir[i], &sc->sc_regs[i]);
5025 }
5026 for (i = 0; i < 31; ++i) {
5027 err |= __get_user(env->fir[i], &sc->sc_fpregs[i]);
5028 }
5029
5030 err |= __get_user(fpcr, &sc->sc_fpcr);
5031 cpu_alpha_store_fpcr(env, fpcr);
5032
5033 return err;
5034 }
5035
5036 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
5037 CPUState *env, unsigned long framesize)
5038 {
5039 abi_ulong sp = env->ir[IR_SP];
5040
5041 /* This is the X/Open sanctioned signal stack switching. */
5042 if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) {
5043 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
5044 }
5045 return (sp - framesize) & -32;
5046 }
5047
5048 static void setup_frame(int sig, struct target_sigaction *ka,
5049 target_sigset_t *set, CPUState *env)
5050 {
5051 abi_ulong frame_addr, r26;
5052 struct target_sigframe *frame;
5053 int err = 0;
5054
5055 frame_addr = get_sigframe(ka, env, sizeof(*frame));
5056 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5057 goto give_sigsegv;
5058 }
5059
5060 err |= setup_sigcontext(&frame->sc, env, frame_addr, set);
5061
5062 if (ka->sa_restorer) {
5063 r26 = ka->sa_restorer;
5064 } else {
5065 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
5066 err |= __put_user(INSN_LDI_R0 + TARGET_NR_sigreturn,
5067 &frame->retcode[1]);
5068 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]);
5069 /* imb() */
5070 r26 = frame_addr;
5071 }
5072
5073 unlock_user_struct(frame, frame_addr, 1);
5074
5075 if (err) {
5076 give_sigsegv:
5077 if (sig == TARGET_SIGSEGV) {
5078 ka->_sa_handler = TARGET_SIG_DFL;
5079 }
5080 force_sig(TARGET_SIGSEGV);
5081 }
5082
5083 env->ir[IR_RA] = r26;
5084 env->ir[IR_PV] = env->pc = ka->_sa_handler;
5085 env->ir[IR_A0] = sig;
5086 env->ir[IR_A1] = 0;
5087 env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc);
5088 env->ir[IR_SP] = frame_addr;
5089 }
5090
5091 static void setup_rt_frame(int sig, struct target_sigaction *ka,
5092 target_siginfo_t *info,
5093 target_sigset_t *set, CPUState *env)
5094 {
5095 abi_ulong frame_addr, r26;
5096 struct target_rt_sigframe *frame;
5097 int i, err = 0;
5098
5099 frame_addr = get_sigframe(ka, env, sizeof(*frame));
5100 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5101 goto give_sigsegv;
5102 }
5103
5104 err |= copy_siginfo_to_user(&frame->info, info);
5105
5106 err |= __put_user(0, &frame->uc.tuc_flags);
5107 err |= __put_user(0, &frame->uc.tuc_link);
5108 err |= __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask);
5109 err |= __put_user(target_sigaltstack_used.ss_sp,
5110 &frame->uc.tuc_stack.ss_sp);
5111 err |= __put_user(sas_ss_flags(env->ir[IR_SP]),
5112 &frame->uc.tuc_stack.ss_flags);
5113 err |= __put_user(target_sigaltstack_used.ss_size,
5114 &frame->uc.tuc_stack.ss_size);
5115 err |= setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set);
5116 for (i = 0; i < TARGET_NSIG_WORDS; ++i) {
5117 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
5118 }
5119
5120 if (ka->sa_restorer) {
5121 r26 = ka->sa_restorer;
5122 } else {
5123 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
5124 err |= __put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn,
5125 &frame->retcode[1]);
5126 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]);
5127 /* imb(); */
5128 r26 = frame_addr;
5129 }
5130
5131 if (err) {
5132 give_sigsegv:
5133 if (sig == TARGET_SIGSEGV) {
5134 ka->_sa_handler = TARGET_SIG_DFL;
5135 }
5136 force_sig(TARGET_SIGSEGV);
5137 }
5138
5139 env->ir[IR_RA] = r26;
5140 env->ir[IR_PV] = env->pc = ka->_sa_handler;
5141 env->ir[IR_A0] = sig;
5142 env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info);
5143 env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
5144 env->ir[IR_SP] = frame_addr;
5145 }
5146
5147 long do_sigreturn(CPUState *env)
5148 {
5149 struct target_sigcontext *sc;
5150 abi_ulong sc_addr = env->ir[IR_A0];
5151 target_sigset_t target_set;
5152 sigset_t set;
5153
5154 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) {
5155 goto badframe;
5156 }
5157
5158 target_sigemptyset(&target_set);
5159 if (__get_user(target_set.sig[0], &sc->sc_mask)) {
5160 goto badframe;
5161 }
5162
5163 target_to_host_sigset_internal(&set, &target_set);
5164 sigprocmask(SIG_SETMASK, &set, NULL);
5165
5166 if (restore_sigcontext(env, sc)) {
5167 goto badframe;
5168 }
5169 unlock_user_struct(sc, sc_addr, 0);
5170 return env->ir[IR_V0];
5171
5172 badframe:
5173 unlock_user_struct(sc, sc_addr, 0);
5174 force_sig(TARGET_SIGSEGV);
5175 }
5176
5177 long do_rt_sigreturn(CPUState *env)
5178 {
5179 abi_ulong frame_addr = env->ir[IR_A0];
5180 struct target_rt_sigframe *frame;
5181 sigset_t set;
5182
5183 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
5184 goto badframe;
5185 }
5186 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
5187 sigprocmask(SIG_SETMASK, &set, NULL);
5188
5189 if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
5190 goto badframe;
5191 }
5192 if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
5193 uc.tuc_stack),
5194 0, env->ir[IR_SP]) == -EFAULT) {
5195 goto badframe;
5196 }
5197
5198 unlock_user_struct(frame, frame_addr, 0);
5199 return env->ir[IR_V0];
5200
5201
5202 badframe:
5203 unlock_user_struct(frame, frame_addr, 0);
5204 force_sig(TARGET_SIGSEGV);
5205 }
5206
5207 #else
5208
5209 static void setup_frame(int sig, struct target_sigaction *ka,
5210 target_sigset_t *set, CPUState *env)
5211 {
5212 fprintf(stderr, "setup_frame: not implemented\n");
5213 }
5214
5215 static void setup_rt_frame(int sig, struct target_sigaction *ka,
5216 target_siginfo_t *info,
5217 target_sigset_t *set, CPUState *env)
5218 {
5219 fprintf(stderr, "setup_rt_frame: not implemented\n");
5220 }
5221
5222 long do_sigreturn(CPUState *env)
5223 {
5224 fprintf(stderr, "do_sigreturn: not implemented\n");
5225 return -TARGET_ENOSYS;
5226 }
5227
5228 long do_rt_sigreturn(CPUState *env)
5229 {
5230 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
5231 return -TARGET_ENOSYS;
5232 }
5233
5234 #endif
5235
5236 void process_pending_signals(CPUState *cpu_env)
5237 {
5238 int sig;
5239 abi_ulong handler;
5240 sigset_t set, old_set;
5241 target_sigset_t target_old_set;
5242 struct emulated_sigtable *k;
5243 struct target_sigaction *sa;
5244 struct sigqueue *q;
5245 TaskState *ts = cpu_env->opaque;
5246
5247 if (!ts->signal_pending)
5248 return;
5249
5250 /* FIXME: This is not threadsafe. */
5251 k = ts->sigtab;
5252 for(sig = 1; sig <= TARGET_NSIG; sig++) {
5253 if (k->pending)
5254 goto handle_signal;
5255 k++;
5256 }
5257 /* if no signal is pending, just return */
5258 ts->signal_pending = 0;
5259 return;
5260
5261 handle_signal:
5262 #ifdef DEBUG_SIGNAL
5263 fprintf(stderr, "qemu: process signal %d\n", sig);
5264 #endif
5265 /* dequeue signal */
5266 q = k->first;
5267 k->first = q->next;
5268 if (!k->first)
5269 k->pending = 0;
5270
5271 sig = gdb_handlesig (cpu_env, sig);
5272 if (!sig) {
5273 sa = NULL;
5274 handler = TARGET_SIG_IGN;
5275 } else {
5276 sa = &sigact_table[sig - 1];
5277 handler = sa->_sa_handler;
5278 }
5279
5280 if (handler == TARGET_SIG_DFL) {
5281 /* default handler : ignore some signal. The other are job control or fatal */
5282 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
5283 kill(getpid(),SIGSTOP);
5284 } else if (sig != TARGET_SIGCHLD &&
5285 sig != TARGET_SIGURG &&
5286 sig != TARGET_SIGWINCH &&
5287 sig != TARGET_SIGCONT) {
5288 force_sig(sig);
5289 }
5290 } else if (handler == TARGET_SIG_IGN) {
5291 /* ignore sig */
5292 } else if (handler == TARGET_SIG_ERR) {
5293 force_sig(sig);
5294 } else {
5295 /* compute the blocked signals during the handler execution */
5296 target_to_host_sigset(&set, &sa->sa_mask);
5297 /* SA_NODEFER indicates that the current signal should not be
5298 blocked during the handler */
5299 if (!(sa->sa_flags & TARGET_SA_NODEFER))
5300 sigaddset(&set, target_to_host_signal(sig));
5301
5302 /* block signals in the handler using Linux */
5303 sigprocmask(SIG_BLOCK, &set, &old_set);
5304 /* save the previous blocked signal state to restore it at the
5305 end of the signal execution (see do_sigreturn) */
5306 host_to_target_sigset_internal(&target_old_set, &old_set);
5307
5308 /* if the CPU is in VM86 mode, we restore the 32 bit values */
5309 #if defined(TARGET_I386) && !defined(TARGET_X86_64)
5310 {
5311 CPUX86State *env = cpu_env;
5312 if (env->eflags & VM_MASK)
5313 save_v86_state(env);
5314 }
5315 #endif
5316 /* prepare the stack frame of the virtual CPU */
5317 if (sa->sa_flags & TARGET_SA_SIGINFO)
5318 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
5319 else
5320 setup_frame(sig, sa, &target_old_set, cpu_env);
5321 if (sa->sa_flags & TARGET_SA_RESETHAND)
5322 sa->_sa_handler = TARGET_SIG_DFL;
5323 }
5324 if (q != &k->info)
5325 free_sigqueue(cpu_env, q);
5326 }
Random patches