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exec: introduce memory_access_size
[qemu.git] / linux-user / signal.c
blob5da8452b2a16de63f5059736efdbcde8730f4cba
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 = host_to_target_signal(info->si_signo);
206 tinfo->si_signo = sig;
207 tinfo->si_errno = 0;
208 tinfo->si_code = info->si_code;
209
210 if (sig == TARGET_SIGILL || sig == TARGET_SIGFPE || sig == TARGET_SIGSEGV
211 || sig == TARGET_SIGBUS || sig == TARGET_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 == TARGET_SIGIO) {
216 tinfo->_sifields._sigpoll._band = info->si_band;
217 tinfo->_sifields._sigpoll._fd = info->si_fd;
218 } else if (sig == TARGET_SIGCHLD) {
219 tinfo->_sifields._sigchld._pid = info->si_pid;
220 tinfo->_sifields._sigchld._uid = info->si_uid;
221 tinfo->_sifields._sigchld._status
222 = host_to_target_waitstatus(info->si_status);
223 tinfo->_sifields._sigchld._utime = info->si_utime;
224 tinfo->_sifields._sigchld._stime = info->si_stime;
225 } else if (sig >= TARGET_SIGRTMIN) {
226 tinfo->_sifields._rt._pid = info->si_pid;
227 tinfo->_sifields._rt._uid = info->si_uid;
228 /* XXX: potential problem if 64 bit */
229 tinfo->_sifields._rt._sigval.sival_ptr
230 = (abi_ulong)(unsigned long)info->si_value.sival_ptr;
231 }
232 }
233
234 static void tswap_siginfo(target_siginfo_t *tinfo,
235 const target_siginfo_t *info)
236 {
237 int sig = info->si_signo;
238 tinfo->si_signo = tswap32(sig);
239 tinfo->si_errno = tswap32(info->si_errno);
240 tinfo->si_code = tswap32(info->si_code);
241
242 if (sig == TARGET_SIGILL || sig == TARGET_SIGFPE || sig == TARGET_SIGSEGV
243 || sig == TARGET_SIGBUS || sig == TARGET_SIGTRAP) {
244 tinfo->_sifields._sigfault._addr
245 = tswapal(info->_sifields._sigfault._addr);
246 } else if (sig == TARGET_SIGIO) {
247 tinfo->_sifields._sigpoll._band
248 = tswap32(info->_sifields._sigpoll._band);
249 tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
250 } else if (sig == TARGET_SIGCHLD) {
251 tinfo->_sifields._sigchld._pid
252 = tswap32(info->_sifields._sigchld._pid);
253 tinfo->_sifields._sigchld._uid
254 = tswap32(info->_sifields._sigchld._uid);
255 tinfo->_sifields._sigchld._status
256 = tswap32(info->_sifields._sigchld._status);
257 tinfo->_sifields._sigchld._utime
258 = tswapal(info->_sifields._sigchld._utime);
259 tinfo->_sifields._sigchld._stime
260 = tswapal(info->_sifields._sigchld._stime);
261 } else if (sig >= TARGET_SIGRTMIN) {
262 tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid);
263 tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid);
264 tinfo->_sifields._rt._sigval.sival_ptr
265 = tswapal(info->_sifields._rt._sigval.sival_ptr);
266 }
267 }
268
269
270 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info)
271 {
272 host_to_target_siginfo_noswap(tinfo, info);
273 tswap_siginfo(tinfo, tinfo);
274 }
275
276 /* XXX: we support only POSIX RT signals are used. */
277 /* XXX: find a solution for 64 bit (additional malloced data is needed) */
278 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo)
279 {
280 info->si_signo = tswap32(tinfo->si_signo);
281 info->si_errno = tswap32(tinfo->si_errno);
282 info->si_code = tswap32(tinfo->si_code);
283 info->si_pid = tswap32(tinfo->_sifields._rt._pid);
284 info->si_uid = tswap32(tinfo->_sifields._rt._uid);
285 info->si_value.sival_ptr =
286 (void *)(long)tswapal(tinfo->_sifields._rt._sigval.sival_ptr);
287 }
288
289 static int fatal_signal (int sig)
290 {
291 switch (sig) {
292 case TARGET_SIGCHLD:
293 case TARGET_SIGURG:
294 case TARGET_SIGWINCH:
295 /* Ignored by default. */
296 return 0;
297 case TARGET_SIGCONT:
298 case TARGET_SIGSTOP:
299 case TARGET_SIGTSTP:
300 case TARGET_SIGTTIN:
301 case TARGET_SIGTTOU:
302 /* Job control signals. */
303 return 0;
304 default:
305 return 1;
306 }
307 }
308
309 /* returns 1 if given signal should dump core if not handled */
310 static int core_dump_signal(int sig)
311 {
312 switch (sig) {
313 case TARGET_SIGABRT:
314 case TARGET_SIGFPE:
315 case TARGET_SIGILL:
316 case TARGET_SIGQUIT:
317 case TARGET_SIGSEGV:
318 case TARGET_SIGTRAP:
319 case TARGET_SIGBUS:
320 return (1);
321 default:
322 return (0);
323 }
324 }
325
326 void signal_init(void)
327 {
328 struct sigaction act;
329 struct sigaction oact;
330 int i, j;
331 int host_sig;
332
333 /* generate signal conversion tables */
334 for(i = 1; i < _NSIG; i++) {
335 if (host_to_target_signal_table[i] == 0)
336 host_to_target_signal_table[i] = i;
337 }
338 for(i = 1; i < _NSIG; i++) {
339 j = host_to_target_signal_table[i];
340 target_to_host_signal_table[j] = i;
341 }
342
343 /* set all host signal handlers. ALL signals are blocked during
344 the handlers to serialize them. */
345 memset(sigact_table, 0, sizeof(sigact_table));
346
347 sigfillset(&act.sa_mask);
348 act.sa_flags = SA_SIGINFO;
349 act.sa_sigaction = host_signal_handler;
350 for(i = 1; i <= TARGET_NSIG; i++) {
351 host_sig = target_to_host_signal(i);
352 sigaction(host_sig, NULL, &oact);
353 if (oact.sa_sigaction == (void *)SIG_IGN) {
354 sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
355 } else if (oact.sa_sigaction == (void *)SIG_DFL) {
356 sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
357 }
358 /* If there's already a handler installed then something has
359 gone horribly wrong, so don't even try to handle that case. */
360 /* Install some handlers for our own use. We need at least
361 SIGSEGV and SIGBUS, to detect exceptions. We can not just
362 trap all signals because it affects syscall interrupt
363 behavior. But do trap all default-fatal signals. */
364 if (fatal_signal (i))
365 sigaction(host_sig, &act, NULL);
366 }
367 }
368
369 /* signal queue handling */
370
371 static inline struct sigqueue *alloc_sigqueue(CPUArchState *env)
372 {
373 TaskState *ts = env->opaque;
374 struct sigqueue *q = ts->first_free;
375 if (!q)
376 return NULL;
377 ts->first_free = q->next;
378 return q;
379 }
380
381 static inline void free_sigqueue(CPUArchState *env, struct sigqueue *q)
382 {
383 TaskState *ts = env->opaque;
384 q->next = ts->first_free;
385 ts->first_free = q;
386 }
387
388 /* abort execution with signal */
389 static void QEMU_NORETURN force_sig(int target_sig)
390 {
391 TaskState *ts = (TaskState *)thread_env->opaque;
392 int host_sig, core_dumped = 0;
393 struct sigaction act;
394 host_sig = target_to_host_signal(target_sig);
395 gdb_signalled(thread_env, target_sig);
396
397 /* dump core if supported by target binary format */
398 if (core_dump_signal(target_sig) && (ts->bprm->core_dump != NULL)) {
399 stop_all_tasks();
400 core_dumped =
401 ((*ts->bprm->core_dump)(target_sig, thread_env) == 0);
402 }
403 if (core_dumped) {
404 /* we already dumped the core of target process, we don't want
405 * a coredump of qemu itself */
406 struct rlimit nodump;
407 getrlimit(RLIMIT_CORE, &nodump);
408 nodump.rlim_cur=0;
409 setrlimit(RLIMIT_CORE, &nodump);
410 (void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n",
411 target_sig, strsignal(host_sig), "core dumped" );
412 }
413
414 /* The proper exit code for dying from an uncaught signal is
415 * -<signal>. The kernel doesn't allow exit() or _exit() to pass
416 * a negative value. To get the proper exit code we need to
417 * actually die from an uncaught signal. Here the default signal
418 * handler is installed, we send ourself a signal and we wait for
419 * it to arrive. */
420 sigfillset(&act.sa_mask);
421 act.sa_handler = SIG_DFL;
422 sigaction(host_sig, &act, NULL);
423
424 /* For some reason raise(host_sig) doesn't send the signal when
425 * statically linked on x86-64. */
426 kill(getpid(), host_sig);
427
428 /* Make sure the signal isn't masked (just reuse the mask inside
429 of act) */
430 sigdelset(&act.sa_mask, host_sig);
431 sigsuspend(&act.sa_mask);
432
433 /* unreachable */
434 abort();
435 }
436
437 /* queue a signal so that it will be send to the virtual CPU as soon
438 as possible */
439 int queue_signal(CPUArchState *env, int sig, target_siginfo_t *info)
440 {
441 TaskState *ts = env->opaque;
442 struct emulated_sigtable *k;
443 struct sigqueue *q, **pq;
444 abi_ulong handler;
445 int queue;
446
447 #if defined(DEBUG_SIGNAL)
448 fprintf(stderr, "queue_signal: sig=%d\n",
449 sig);
450 #endif
451 k = &ts->sigtab[sig - 1];
452 queue = gdb_queuesig ();
453 handler = sigact_table[sig - 1]._sa_handler;
454 if (!queue && handler == TARGET_SIG_DFL) {
455 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
456 kill(getpid(),SIGSTOP);
457 return 0;
458 } else
459 /* default handler : ignore some signal. The other are fatal */
460 if (sig != TARGET_SIGCHLD &&
461 sig != TARGET_SIGURG &&
462 sig != TARGET_SIGWINCH &&
463 sig != TARGET_SIGCONT) {
464 force_sig(sig);
465 } else {
466 return 0; /* indicate ignored */
467 }
468 } else if (!queue && handler == TARGET_SIG_IGN) {
469 /* ignore signal */
470 return 0;
471 } else if (!queue && handler == TARGET_SIG_ERR) {
472 force_sig(sig);
473 } else {
474 pq = &k->first;
475 if (sig < TARGET_SIGRTMIN) {
476 /* if non real time signal, we queue exactly one signal */
477 if (!k->pending)
478 q = &k->info;
479 else
480 return 0;
481 } else {
482 if (!k->pending) {
483 /* first signal */
484 q = &k->info;
485 } else {
486 q = alloc_sigqueue(env);
487 if (!q)
488 return -EAGAIN;
489 while (*pq != NULL)
490 pq = &(*pq)->next;
491 }
492 }
493 *pq = q;
494 q->info = *info;
495 q->next = NULL;
496 k->pending = 1;
497 /* signal that a new signal is pending */
498 ts->signal_pending = 1;
499 return 1; /* indicates that the signal was queued */
500 }
501 }
502
503 static void host_signal_handler(int host_signum, siginfo_t *info,
504 void *puc)
505 {
506 int sig;
507 target_siginfo_t tinfo;
508
509 /* the CPU emulator uses some host signals to detect exceptions,
510 we forward to it some signals */
511 if ((host_signum == SIGSEGV || host_signum == SIGBUS)
512 && info->si_code > 0) {
513 if (cpu_signal_handler(host_signum, info, puc))
514 return;
515 }
516
517 /* get target signal number */
518 sig = host_to_target_signal(host_signum);
519 if (sig < 1 || sig > TARGET_NSIG)
520 return;
521 #if defined(DEBUG_SIGNAL)
522 fprintf(stderr, "qemu: got signal %d\n", sig);
523 #endif
524 host_to_target_siginfo_noswap(&tinfo, info);
525 if (queue_signal(thread_env, sig, &tinfo) == 1) {
526 /* interrupt the virtual CPU as soon as possible */
527 cpu_exit(thread_env);
528 }
529 }
530
531 /* do_sigaltstack() returns target values and errnos. */
532 /* compare linux/kernel/signal.c:do_sigaltstack() */
533 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
534 {
535 int ret;
536 struct target_sigaltstack oss;
537
538 /* XXX: test errors */
539 if(uoss_addr)
540 {
541 __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
542 __put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
543 __put_user(sas_ss_flags(sp), &oss.ss_flags);
544 }
545
546 if(uss_addr)
547 {
548 struct target_sigaltstack *uss;
549 struct target_sigaltstack ss;
550
551 ret = -TARGET_EFAULT;
552 if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)
553 || __get_user(ss.ss_sp, &uss->ss_sp)
554 || __get_user(ss.ss_size, &uss->ss_size)
555 || __get_user(ss.ss_flags, &uss->ss_flags))
556 goto out;
557 unlock_user_struct(uss, uss_addr, 0);
558
559 ret = -TARGET_EPERM;
560 if (on_sig_stack(sp))
561 goto out;
562
563 ret = -TARGET_EINVAL;
564 if (ss.ss_flags != TARGET_SS_DISABLE
565 && ss.ss_flags != TARGET_SS_ONSTACK
566 && ss.ss_flags != 0)
567 goto out;
568
569 if (ss.ss_flags == TARGET_SS_DISABLE) {
570 ss.ss_size = 0;
571 ss.ss_sp = 0;
572 } else {
573 ret = -TARGET_ENOMEM;
574 if (ss.ss_size < MINSIGSTKSZ)
575 goto out;
576 }
577
578 target_sigaltstack_used.ss_sp = ss.ss_sp;
579 target_sigaltstack_used.ss_size = ss.ss_size;
580 }
581
582 if (uoss_addr) {
583 ret = -TARGET_EFAULT;
584 if (copy_to_user(uoss_addr, &oss, sizeof(oss)))
585 goto out;
586 }
587
588 ret = 0;
589 out:
590 return ret;
591 }
592
593 /* do_sigaction() return host values and errnos */
594 int do_sigaction(int sig, const struct target_sigaction *act,
595 struct target_sigaction *oact)
596 {
597 struct target_sigaction *k;
598 struct sigaction act1;
599 int host_sig;
600 int ret = 0;
601
602 if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP)
603 return -EINVAL;
604 k = &sigact_table[sig - 1];
605 #if defined(DEBUG_SIGNAL)
606 fprintf(stderr, "sigaction sig=%d act=0x%p, oact=0x%p\n",
607 sig, act, oact);
608 #endif
609 if (oact) {
610 __put_user(k->_sa_handler, &oact->_sa_handler);
611 __put_user(k->sa_flags, &oact->sa_flags);
612 #if !defined(TARGET_MIPS)
613 __put_user(k->sa_restorer, &oact->sa_restorer);
614 #endif
615 /* Not swapped. */
616 oact->sa_mask = k->sa_mask;
617 }
618 if (act) {
619 /* FIXME: This is not threadsafe. */
620 __get_user(k->_sa_handler, &act->_sa_handler);
621 __get_user(k->sa_flags, &act->sa_flags);
622 #if !defined(TARGET_MIPS)
623 __get_user(k->sa_restorer, &act->sa_restorer);
624 #endif
625 /* To be swapped in target_to_host_sigset. */
626 k->sa_mask = act->sa_mask;
627
628 /* we update the host linux signal state */
629 host_sig = target_to_host_signal(sig);
630 if (host_sig != SIGSEGV && host_sig != SIGBUS) {
631 sigfillset(&act1.sa_mask);
632 act1.sa_flags = SA_SIGINFO;
633 if (k->sa_flags & TARGET_SA_RESTART)
634 act1.sa_flags |= SA_RESTART;
635 /* NOTE: it is important to update the host kernel signal
636 ignore state to avoid getting unexpected interrupted
637 syscalls */
638 if (k->_sa_handler == TARGET_SIG_IGN) {
639 act1.sa_sigaction = (void *)SIG_IGN;
640 } else if (k->_sa_handler == TARGET_SIG_DFL) {
641 if (fatal_signal (sig))
642 act1.sa_sigaction = host_signal_handler;
643 else
644 act1.sa_sigaction = (void *)SIG_DFL;
645 } else {
646 act1.sa_sigaction = host_signal_handler;
647 }
648 ret = sigaction(host_sig, &act1, NULL);
649 }
650 }
651 return ret;
652 }
653
654 static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
655 const target_siginfo_t *info)
656 {
657 tswap_siginfo(tinfo, info);
658 return 0;
659 }
660
661 static inline int current_exec_domain_sig(int sig)
662 {
663 return /* current->exec_domain && current->exec_domain->signal_invmap
664 && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
665 }
666
667 #if defined(TARGET_I386) && TARGET_ABI_BITS == 32
668
669 /* from the Linux kernel */
670
671 struct target_fpreg {
672 uint16_t significand[4];
673 uint16_t exponent;
674 };
675
676 struct target_fpxreg {
677 uint16_t significand[4];
678 uint16_t exponent;
679 uint16_t padding[3];
680 };
681
682 struct target_xmmreg {
683 abi_ulong element[4];
684 };
685
686 struct target_fpstate {
687 /* Regular FPU environment */
688 abi_ulong cw;
689 abi_ulong sw;
690 abi_ulong tag;
691 abi_ulong ipoff;
692 abi_ulong cssel;
693 abi_ulong dataoff;
694 abi_ulong datasel;
695 struct target_fpreg _st[8];
696 uint16_t status;
697 uint16_t magic; /* 0xffff = regular FPU data only */
698
699 /* FXSR FPU environment */
700 abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
701 abi_ulong mxcsr;
702 abi_ulong reserved;
703 struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
704 struct target_xmmreg _xmm[8];
705 abi_ulong padding[56];
706 };
707
708 #define X86_FXSR_MAGIC 0x0000
709
710 struct target_sigcontext {
711 uint16_t gs, __gsh;
712 uint16_t fs, __fsh;
713 uint16_t es, __esh;
714 uint16_t ds, __dsh;
715 abi_ulong edi;
716 abi_ulong esi;
717 abi_ulong ebp;
718 abi_ulong esp;
719 abi_ulong ebx;
720 abi_ulong edx;
721 abi_ulong ecx;
722 abi_ulong eax;
723 abi_ulong trapno;
724 abi_ulong err;
725 abi_ulong eip;
726 uint16_t cs, __csh;
727 abi_ulong eflags;
728 abi_ulong esp_at_signal;
729 uint16_t ss, __ssh;
730 abi_ulong fpstate; /* pointer */
731 abi_ulong oldmask;
732 abi_ulong cr2;
733 };
734
735 struct target_ucontext {
736 abi_ulong tuc_flags;
737 abi_ulong tuc_link;
738 target_stack_t tuc_stack;
739 struct target_sigcontext tuc_mcontext;
740 target_sigset_t tuc_sigmask; /* mask last for extensibility */
741 };
742
743 struct sigframe
744 {
745 abi_ulong pretcode;
746 int sig;
747 struct target_sigcontext sc;
748 struct target_fpstate fpstate;
749 abi_ulong extramask[TARGET_NSIG_WORDS-1];
750 char retcode[8];
751 };
752
753 struct rt_sigframe
754 {
755 abi_ulong pretcode;
756 int sig;
757 abi_ulong pinfo;
758 abi_ulong puc;
759 struct target_siginfo info;
760 struct target_ucontext uc;
761 struct target_fpstate fpstate;
762 char retcode[8];
763 };
764
765 /*
766 * Set up a signal frame.
767 */
768
769 /* XXX: save x87 state */
770 static int
771 setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
772 CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr)
773 {
774 int err = 0;
775 uint16_t magic;
776
777 /* already locked in setup_frame() */
778 err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
779 err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
780 err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
781 err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
782 err |= __put_user(env->regs[R_EDI], &sc->edi);
783 err |= __put_user(env->regs[R_ESI], &sc->esi);
784 err |= __put_user(env->regs[R_EBP], &sc->ebp);
785 err |= __put_user(env->regs[R_ESP], &sc->esp);
786 err |= __put_user(env->regs[R_EBX], &sc->ebx);
787 err |= __put_user(env->regs[R_EDX], &sc->edx);
788 err |= __put_user(env->regs[R_ECX], &sc->ecx);
789 err |= __put_user(env->regs[R_EAX], &sc->eax);
790 err |= __put_user(env->exception_index, &sc->trapno);
791 err |= __put_user(env->error_code, &sc->err);
792 err |= __put_user(env->eip, &sc->eip);
793 err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
794 err |= __put_user(env->eflags, &sc->eflags);
795 err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
796 err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
797
798 cpu_x86_fsave(env, fpstate_addr, 1);
799 fpstate->status = fpstate->sw;
800 magic = 0xffff;
801 err |= __put_user(magic, &fpstate->magic);
802 err |= __put_user(fpstate_addr, &sc->fpstate);
803
804 /* non-iBCS2 extensions.. */
805 err |= __put_user(mask, &sc->oldmask);
806 err |= __put_user(env->cr[2], &sc->cr2);
807 return err;
808 }
809
810 /*
811 * Determine which stack to use..
812 */
813
814 static inline abi_ulong
815 get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
816 {
817 unsigned long esp;
818
819 /* Default to using normal stack */
820 esp = env->regs[R_ESP];
821 /* This is the X/Open sanctioned signal stack switching. */
822 if (ka->sa_flags & TARGET_SA_ONSTACK) {
823 if (sas_ss_flags(esp) == 0)
824 esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
825 }
826
827 /* This is the legacy signal stack switching. */
828 else
829 if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
830 !(ka->sa_flags & TARGET_SA_RESTORER) &&
831 ka->sa_restorer) {
832 esp = (unsigned long) ka->sa_restorer;
833 }
834 return (esp - frame_size) & -8ul;
835 }
836
837 /* compare linux/arch/i386/kernel/signal.c:setup_frame() */
838 static void setup_frame(int sig, struct target_sigaction *ka,
839 target_sigset_t *set, CPUX86State *env)
840 {
841 abi_ulong frame_addr;
842 struct sigframe *frame;
843 int i, err = 0;
844
845 frame_addr = get_sigframe(ka, env, sizeof(*frame));
846
847 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
848 goto give_sigsegv;
849
850 err |= __put_user(current_exec_domain_sig(sig),
851 &frame->sig);
852 if (err)
853 goto give_sigsegv;
854
855 setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
856 frame_addr + offsetof(struct sigframe, fpstate));
857 if (err)
858 goto give_sigsegv;
859
860 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
861 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
862 goto give_sigsegv;
863 }
864
865 /* Set up to return from userspace. If provided, use a stub
866 already in userspace. */
867 if (ka->sa_flags & TARGET_SA_RESTORER) {
868 err |= __put_user(ka->sa_restorer, &frame->pretcode);
869 } else {
870 uint16_t val16;
871 abi_ulong retcode_addr;
872 retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
873 err |= __put_user(retcode_addr, &frame->pretcode);
874 /* This is popl %eax ; movl $,%eax ; int $0x80 */
875 val16 = 0xb858;
876 err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
877 err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
878 val16 = 0x80cd;
879 err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
880 }
881
882 if (err)
883 goto give_sigsegv;
884
885 /* Set up registers for signal handler */
886 env->regs[R_ESP] = frame_addr;
887 env->eip = ka->_sa_handler;
888
889 cpu_x86_load_seg(env, R_DS, __USER_DS);
890 cpu_x86_load_seg(env, R_ES, __USER_DS);
891 cpu_x86_load_seg(env, R_SS, __USER_DS);
892 cpu_x86_load_seg(env, R_CS, __USER_CS);
893 env->eflags &= ~TF_MASK;
894
895 unlock_user_struct(frame, frame_addr, 1);
896
897 return;
898
899 give_sigsegv:
900 unlock_user_struct(frame, frame_addr, 1);
901 if (sig == TARGET_SIGSEGV)
902 ka->_sa_handler = TARGET_SIG_DFL;
903 force_sig(TARGET_SIGSEGV /* , current */);
904 }
905
906 /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
907 static void setup_rt_frame(int sig, struct target_sigaction *ka,
908 target_siginfo_t *info,
909 target_sigset_t *set, CPUX86State *env)
910 {
911 abi_ulong frame_addr, addr;
912 struct rt_sigframe *frame;
913 int i, err = 0;
914
915 frame_addr = get_sigframe(ka, env, sizeof(*frame));
916
917 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
918 goto give_sigsegv;
919
920 err |= __put_user(current_exec_domain_sig(sig),
921 &frame->sig);
922 addr = frame_addr + offsetof(struct rt_sigframe, info);
923 err |= __put_user(addr, &frame->pinfo);
924 addr = frame_addr + offsetof(struct rt_sigframe, uc);
925 err |= __put_user(addr, &frame->puc);
926 err |= copy_siginfo_to_user(&frame->info, info);
927 if (err)
928 goto give_sigsegv;
929
930 /* Create the ucontext. */
931 err |= __put_user(0, &frame->uc.tuc_flags);
932 err |= __put_user(0, &frame->uc.tuc_link);
933 err |= __put_user(target_sigaltstack_used.ss_sp,
934 &frame->uc.tuc_stack.ss_sp);
935 err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
936 &frame->uc.tuc_stack.ss_flags);
937 err |= __put_user(target_sigaltstack_used.ss_size,
938 &frame->uc.tuc_stack.ss_size);
939 err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
940 env, set->sig[0],
941 frame_addr + offsetof(struct rt_sigframe, fpstate));
942 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
943 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
944 goto give_sigsegv;
945 }
946
947 /* Set up to return from userspace. If provided, use a stub
948 already in userspace. */
949 if (ka->sa_flags & TARGET_SA_RESTORER) {
950 err |= __put_user(ka->sa_restorer, &frame->pretcode);
951 } else {
952 uint16_t val16;
953 addr = frame_addr + offsetof(struct rt_sigframe, retcode);
954 err |= __put_user(addr, &frame->pretcode);
955 /* This is movl $,%eax ; int $0x80 */
956 err |= __put_user(0xb8, (char *)(frame->retcode+0));
957 err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
958 val16 = 0x80cd;
959 err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
960 }
961
962 if (err)
963 goto give_sigsegv;
964
965 /* Set up registers for signal handler */
966 env->regs[R_ESP] = frame_addr;
967 env->eip = ka->_sa_handler;
968
969 cpu_x86_load_seg(env, R_DS, __USER_DS);
970 cpu_x86_load_seg(env, R_ES, __USER_DS);
971 cpu_x86_load_seg(env, R_SS, __USER_DS);
972 cpu_x86_load_seg(env, R_CS, __USER_CS);
973 env->eflags &= ~TF_MASK;
974
975 unlock_user_struct(frame, frame_addr, 1);
976
977 return;
978
979 give_sigsegv:
980 unlock_user_struct(frame, frame_addr, 1);
981 if (sig == TARGET_SIGSEGV)
982 ka->_sa_handler = TARGET_SIG_DFL;
983 force_sig(TARGET_SIGSEGV /* , current */);
984 }
985
986 static int
987 restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
988 {
989 unsigned int err = 0;
990 abi_ulong fpstate_addr;
991 unsigned int tmpflags;
992
993 cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
994 cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
995 cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
996 cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
997
998 env->regs[R_EDI] = tswapl(sc->edi);
999 env->regs[R_ESI] = tswapl(sc->esi);
1000 env->regs[R_EBP] = tswapl(sc->ebp);
1001 env->regs[R_ESP] = tswapl(sc->esp);
1002 env->regs[R_EBX] = tswapl(sc->ebx);
1003 env->regs[R_EDX] = tswapl(sc->edx);
1004 env->regs[R_ECX] = tswapl(sc->ecx);
1005 env->eip = tswapl(sc->eip);
1006
1007 cpu_x86_load_seg(env, R_CS, lduw_p(&sc->cs) | 3);
1008 cpu_x86_load_seg(env, R_SS, lduw_p(&sc->ss) | 3);
1009
1010 tmpflags = tswapl(sc->eflags);
1011 env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
1012 // regs->orig_eax = -1; /* disable syscall checks */
1013
1014 fpstate_addr = tswapl(sc->fpstate);
1015 if (fpstate_addr != 0) {
1016 if (!access_ok(VERIFY_READ, fpstate_addr,
1017 sizeof(struct target_fpstate)))
1018 goto badframe;
1019 cpu_x86_frstor(env, fpstate_addr, 1);
1020 }
1021
1022 *peax = tswapl(sc->eax);
1023 return err;
1024 badframe:
1025 return 1;
1026 }
1027
1028 long do_sigreturn(CPUX86State *env)
1029 {
1030 struct sigframe *frame;
1031 abi_ulong frame_addr = env->regs[R_ESP] - 8;
1032 target_sigset_t target_set;
1033 sigset_t set;
1034 int eax, i;
1035
1036 #if defined(DEBUG_SIGNAL)
1037 fprintf(stderr, "do_sigreturn\n");
1038 #endif
1039 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1040 goto badframe;
1041 /* set blocked signals */
1042 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
1043 goto badframe;
1044 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1045 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
1046 goto badframe;
1047 }
1048
1049 target_to_host_sigset_internal(&set, &target_set);
1050 sigprocmask(SIG_SETMASK, &set, NULL);
1051
1052 /* restore registers */
1053 if (restore_sigcontext(env, &frame->sc, &eax))
1054 goto badframe;
1055 unlock_user_struct(frame, frame_addr, 0);
1056 return eax;
1057
1058 badframe:
1059 unlock_user_struct(frame, frame_addr, 0);
1060 force_sig(TARGET_SIGSEGV);
1061 return 0;
1062 }
1063
1064 long do_rt_sigreturn(CPUX86State *env)
1065 {
1066 abi_ulong frame_addr;
1067 struct rt_sigframe *frame;
1068 sigset_t set;
1069 int eax;
1070
1071 frame_addr = env->regs[R_ESP] - 4;
1072 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1073 goto badframe;
1074 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
1075 sigprocmask(SIG_SETMASK, &set, NULL);
1076
1077 if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
1078 goto badframe;
1079
1080 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
1081 get_sp_from_cpustate(env)) == -EFAULT)
1082 goto badframe;
1083
1084 unlock_user_struct(frame, frame_addr, 0);
1085 return eax;
1086
1087 badframe:
1088 unlock_user_struct(frame, frame_addr, 0);
1089 force_sig(TARGET_SIGSEGV);
1090 return 0;
1091 }
1092
1093 #elif defined(TARGET_ARM)
1094
1095 struct target_sigcontext {
1096 abi_ulong trap_no;
1097 abi_ulong error_code;
1098 abi_ulong oldmask;
1099 abi_ulong arm_r0;
1100 abi_ulong arm_r1;
1101 abi_ulong arm_r2;
1102 abi_ulong arm_r3;
1103 abi_ulong arm_r4;
1104 abi_ulong arm_r5;
1105 abi_ulong arm_r6;
1106 abi_ulong arm_r7;
1107 abi_ulong arm_r8;
1108 abi_ulong arm_r9;
1109 abi_ulong arm_r10;
1110 abi_ulong arm_fp;
1111 abi_ulong arm_ip;
1112 abi_ulong arm_sp;
1113 abi_ulong arm_lr;
1114 abi_ulong arm_pc;
1115 abi_ulong arm_cpsr;
1116 abi_ulong fault_address;
1117 };
1118
1119 struct target_ucontext_v1 {
1120 abi_ulong tuc_flags;
1121 abi_ulong tuc_link;
1122 target_stack_t tuc_stack;
1123 struct target_sigcontext tuc_mcontext;
1124 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1125 };
1126
1127 struct target_ucontext_v2 {
1128 abi_ulong tuc_flags;
1129 abi_ulong tuc_link;
1130 target_stack_t tuc_stack;
1131 struct target_sigcontext tuc_mcontext;
1132 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1133 char __unused[128 - sizeof(target_sigset_t)];
1134 abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
1135 };
1136
1137 struct target_user_vfp {
1138 uint64_t fpregs[32];
1139 abi_ulong fpscr;
1140 };
1141
1142 struct target_user_vfp_exc {
1143 abi_ulong fpexc;
1144 abi_ulong fpinst;
1145 abi_ulong fpinst2;
1146 };
1147
1148 struct target_vfp_sigframe {
1149 abi_ulong magic;
1150 abi_ulong size;
1151 struct target_user_vfp ufp;
1152 struct target_user_vfp_exc ufp_exc;
1153 } __attribute__((__aligned__(8)));
1154
1155 struct target_iwmmxt_sigframe {
1156 abi_ulong magic;
1157 abi_ulong size;
1158 uint64_t regs[16];
1159 /* Note that not all the coprocessor control registers are stored here */
1160 uint32_t wcssf;
1161 uint32_t wcasf;
1162 uint32_t wcgr0;
1163 uint32_t wcgr1;
1164 uint32_t wcgr2;
1165 uint32_t wcgr3;
1166 } __attribute__((__aligned__(8)));
1167
1168 #define TARGET_VFP_MAGIC 0x56465001
1169 #define TARGET_IWMMXT_MAGIC 0x12ef842a
1170
1171 struct sigframe_v1
1172 {
1173 struct target_sigcontext sc;
1174 abi_ulong extramask[TARGET_NSIG_WORDS-1];
1175 abi_ulong retcode;
1176 };
1177
1178 struct sigframe_v2
1179 {
1180 struct target_ucontext_v2 uc;
1181 abi_ulong retcode;
1182 };
1183
1184 struct rt_sigframe_v1
1185 {
1186 abi_ulong pinfo;
1187 abi_ulong puc;
1188 struct target_siginfo info;
1189 struct target_ucontext_v1 uc;
1190 abi_ulong retcode;
1191 };
1192
1193 struct rt_sigframe_v2
1194 {
1195 struct target_siginfo info;
1196 struct target_ucontext_v2 uc;
1197 abi_ulong retcode;
1198 };
1199
1200 #define TARGET_CONFIG_CPU_32 1
1201
1202 /*
1203 * For ARM syscalls, we encode the syscall number into the instruction.
1204 */
1205 #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
1206 #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
1207
1208 /*
1209 * For Thumb syscalls, we pass the syscall number via r7. We therefore
1210 * need two 16-bit instructions.
1211 */
1212 #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
1213 #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
1214
1215 static const abi_ulong retcodes[4] = {
1216 SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
1217 SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
1218 };
1219
1220
1221 #define __get_user_error(x,p,e) __get_user(x, p)
1222
1223 static inline int valid_user_regs(CPUARMState *regs)
1224 {
1225 return 1;
1226 }
1227
1228 static void
1229 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1230 CPUARMState *env, abi_ulong mask)
1231 {
1232 __put_user(env->regs[0], &sc->arm_r0);
1233 __put_user(env->regs[1], &sc->arm_r1);
1234 __put_user(env->regs[2], &sc->arm_r2);
1235 __put_user(env->regs[3], &sc->arm_r3);
1236 __put_user(env->regs[4], &sc->arm_r4);
1237 __put_user(env->regs[5], &sc->arm_r5);
1238 __put_user(env->regs[6], &sc->arm_r6);
1239 __put_user(env->regs[7], &sc->arm_r7);
1240 __put_user(env->regs[8], &sc->arm_r8);
1241 __put_user(env->regs[9], &sc->arm_r9);
1242 __put_user(env->regs[10], &sc->arm_r10);
1243 __put_user(env->regs[11], &sc->arm_fp);
1244 __put_user(env->regs[12], &sc->arm_ip);
1245 __put_user(env->regs[13], &sc->arm_sp);
1246 __put_user(env->regs[14], &sc->arm_lr);
1247 __put_user(env->regs[15], &sc->arm_pc);
1248 #ifdef TARGET_CONFIG_CPU_32
1249 __put_user(cpsr_read(env), &sc->arm_cpsr);
1250 #endif
1251
1252 __put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
1253 __put_user(/* current->thread.error_code */ 0, &sc->error_code);
1254 __put_user(/* current->thread.address */ 0, &sc->fault_address);
1255 __put_user(mask, &sc->oldmask);
1256 }
1257
1258 static inline abi_ulong
1259 get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize)
1260 {
1261 unsigned long sp = regs->regs[13];
1262
1263 /*
1264 * This is the X/Open sanctioned signal stack switching.
1265 */
1266 if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
1267 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1268 /*
1269 * ATPCS B01 mandates 8-byte alignment
1270 */
1271 return (sp - framesize) & ~7;
1272 }
1273
1274 static int
1275 setup_return(CPUARMState *env, struct target_sigaction *ka,
1276 abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
1277 {
1278 abi_ulong handler = ka->_sa_handler;
1279 abi_ulong retcode;
1280 int thumb = handler & 1;
1281 uint32_t cpsr = cpsr_read(env);
1282
1283 cpsr &= ~CPSR_IT;
1284 if (thumb) {
1285 cpsr |= CPSR_T;
1286 } else {
1287 cpsr &= ~CPSR_T;
1288 }
1289
1290 if (ka->sa_flags & TARGET_SA_RESTORER) {
1291 retcode = ka->sa_restorer;
1292 } else {
1293 unsigned int idx = thumb;
1294
1295 if (ka->sa_flags & TARGET_SA_SIGINFO)
1296 idx += 2;
1297
1298 if (__put_user(retcodes[idx], rc))
1299 return 1;
1300
1301 retcode = rc_addr + thumb;
1302 }
1303
1304 env->regs[0] = usig;
1305 env->regs[13] = frame_addr;
1306 env->regs[14] = retcode;
1307 env->regs[15] = handler & (thumb ? ~1 : ~3);
1308 cpsr_write(env, cpsr, 0xffffffff);
1309
1310 return 0;
1311 }
1312
1313 static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env)
1314 {
1315 int i;
1316 struct target_vfp_sigframe *vfpframe;
1317 vfpframe = (struct target_vfp_sigframe *)regspace;
1318 __put_user(TARGET_VFP_MAGIC, &vfpframe->magic);
1319 __put_user(sizeof(*vfpframe), &vfpframe->size);
1320 for (i = 0; i < 32; i++) {
1321 __put_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]);
1322 }
1323 __put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr);
1324 __put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc);
1325 __put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
1326 __put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
1327 return (abi_ulong*)(vfpframe+1);
1328 }
1329
1330 static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace,
1331 CPUARMState *env)
1332 {
1333 int i;
1334 struct target_iwmmxt_sigframe *iwmmxtframe;
1335 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
1336 __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic);
1337 __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size);
1338 for (i = 0; i < 16; i++) {
1339 __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
1340 }
1341 __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
1342 __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
1343 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
1344 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
1345 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
1346 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
1347 return (abi_ulong*)(iwmmxtframe+1);
1348 }
1349
1350 static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
1351 target_sigset_t *set, CPUARMState *env)
1352 {
1353 struct target_sigaltstack stack;
1354 int i;
1355 abi_ulong *regspace;
1356
1357 /* Clear all the bits of the ucontext we don't use. */
1358 memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
1359
1360 memset(&stack, 0, sizeof(stack));
1361 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1362 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1363 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1364 memcpy(&uc->tuc_stack, &stack, sizeof(stack));
1365
1366 setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
1367 /* Save coprocessor signal frame. */
1368 regspace = uc->tuc_regspace;
1369 if (arm_feature(env, ARM_FEATURE_VFP)) {
1370 regspace = setup_sigframe_v2_vfp(regspace, env);
1371 }
1372 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
1373 regspace = setup_sigframe_v2_iwmmxt(regspace, env);
1374 }
1375
1376 /* Write terminating magic word */
1377 __put_user(0, regspace);
1378
1379 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1380 __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
1381 }
1382 }
1383
1384 /* compare linux/arch/arm/kernel/signal.c:setup_frame() */
1385 static void setup_frame_v1(int usig, struct target_sigaction *ka,
1386 target_sigset_t *set, CPUARMState *regs)
1387 {
1388 struct sigframe_v1 *frame;
1389 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1390 int i;
1391
1392 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1393 return;
1394
1395 setup_sigcontext(&frame->sc, regs, set->sig[0]);
1396
1397 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1398 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
1399 goto end;
1400 }
1401
1402 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1403 frame_addr + offsetof(struct sigframe_v1, retcode));
1404
1405 end:
1406 unlock_user_struct(frame, frame_addr, 1);
1407 }
1408
1409 static void setup_frame_v2(int usig, struct target_sigaction *ka,
1410 target_sigset_t *set, CPUARMState *regs)
1411 {
1412 struct sigframe_v2 *frame;
1413 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1414
1415 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1416 return;
1417
1418 setup_sigframe_v2(&frame->uc, set, regs);
1419
1420 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1421 frame_addr + offsetof(struct sigframe_v2, retcode));
1422
1423 unlock_user_struct(frame, frame_addr, 1);
1424 }
1425
1426 static void setup_frame(int usig, struct target_sigaction *ka,
1427 target_sigset_t *set, CPUARMState *regs)
1428 {
1429 if (get_osversion() >= 0x020612) {
1430 setup_frame_v2(usig, ka, set, regs);
1431 } else {
1432 setup_frame_v1(usig, ka, set, regs);
1433 }
1434 }
1435
1436 /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
1437 static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
1438 target_siginfo_t *info,
1439 target_sigset_t *set, CPUARMState *env)
1440 {
1441 struct rt_sigframe_v1 *frame;
1442 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1443 struct target_sigaltstack stack;
1444 int i;
1445 abi_ulong info_addr, uc_addr;
1446
1447 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1448 return /* 1 */;
1449
1450 info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
1451 __put_user(info_addr, &frame->pinfo);
1452 uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
1453 __put_user(uc_addr, &frame->puc);
1454 copy_siginfo_to_user(&frame->info, info);
1455
1456 /* Clear all the bits of the ucontext we don't use. */
1457 memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
1458
1459 memset(&stack, 0, sizeof(stack));
1460 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1461 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1462 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1463 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
1464
1465 setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
1466 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1467 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
1468 goto end;
1469 }
1470
1471 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1472 frame_addr + offsetof(struct rt_sigframe_v1, retcode));
1473
1474 env->regs[1] = info_addr;
1475 env->regs[2] = uc_addr;
1476
1477 end:
1478 unlock_user_struct(frame, frame_addr, 1);
1479 }
1480
1481 static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
1482 target_siginfo_t *info,
1483 target_sigset_t *set, CPUARMState *env)
1484 {
1485 struct rt_sigframe_v2 *frame;
1486 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1487 abi_ulong info_addr, uc_addr;
1488
1489 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1490 return /* 1 */;
1491
1492 info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
1493 uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
1494 copy_siginfo_to_user(&frame->info, info);
1495
1496 setup_sigframe_v2(&frame->uc, set, env);
1497
1498 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1499 frame_addr + offsetof(struct rt_sigframe_v2, retcode));
1500
1501 env->regs[1] = info_addr;
1502 env->regs[2] = uc_addr;
1503
1504 unlock_user_struct(frame, frame_addr, 1);
1505 }
1506
1507 static void setup_rt_frame(int usig, struct target_sigaction *ka,
1508 target_siginfo_t *info,
1509 target_sigset_t *set, CPUARMState *env)
1510 {
1511 if (get_osversion() >= 0x020612) {
1512 setup_rt_frame_v2(usig, ka, info, set, env);
1513 } else {
1514 setup_rt_frame_v1(usig, ka, info, set, env);
1515 }
1516 }
1517
1518 static int
1519 restore_sigcontext(CPUARMState *env, struct target_sigcontext *sc)
1520 {
1521 int err = 0;
1522 uint32_t cpsr;
1523
1524 __get_user_error(env->regs[0], &sc->arm_r0, err);
1525 __get_user_error(env->regs[1], &sc->arm_r1, err);
1526 __get_user_error(env->regs[2], &sc->arm_r2, err);
1527 __get_user_error(env->regs[3], &sc->arm_r3, err);
1528 __get_user_error(env->regs[4], &sc->arm_r4, err);
1529 __get_user_error(env->regs[5], &sc->arm_r5, err);
1530 __get_user_error(env->regs[6], &sc->arm_r6, err);
1531 __get_user_error(env->regs[7], &sc->arm_r7, err);
1532 __get_user_error(env->regs[8], &sc->arm_r8, err);
1533 __get_user_error(env->regs[9], &sc->arm_r9, err);
1534 __get_user_error(env->regs[10], &sc->arm_r10, err);
1535 __get_user_error(env->regs[11], &sc->arm_fp, err);
1536 __get_user_error(env->regs[12], &sc->arm_ip, err);
1537 __get_user_error(env->regs[13], &sc->arm_sp, err);
1538 __get_user_error(env->regs[14], &sc->arm_lr, err);
1539 __get_user_error(env->regs[15], &sc->arm_pc, err);
1540 #ifdef TARGET_CONFIG_CPU_32
1541 __get_user_error(cpsr, &sc->arm_cpsr, err);
1542 cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC);
1543 #endif
1544
1545 err |= !valid_user_regs(env);
1546
1547 return err;
1548 }
1549
1550 static long do_sigreturn_v1(CPUARMState *env)
1551 {
1552 abi_ulong frame_addr;
1553 struct sigframe_v1 *frame;
1554 target_sigset_t set;
1555 sigset_t host_set;
1556 int i;
1557
1558 /*
1559 * Since we stacked the signal on a 64-bit boundary,
1560 * then 'sp' should be word aligned here. If it's
1561 * not, then the user is trying to mess with us.
1562 */
1563 if (env->regs[13] & 7)
1564 goto badframe;
1565
1566 frame_addr = env->regs[13];
1567 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1568 goto badframe;
1569
1570 if (__get_user(set.sig[0], &frame->sc.oldmask))
1571 goto badframe;
1572 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1573 if (__get_user(set.sig[i], &frame->extramask[i - 1]))
1574 goto badframe;
1575 }
1576
1577 target_to_host_sigset_internal(&host_set, &set);
1578 sigprocmask(SIG_SETMASK, &host_set, NULL);
1579
1580 if (restore_sigcontext(env, &frame->sc))
1581 goto badframe;
1582
1583 #if 0
1584 /* Send SIGTRAP if we're single-stepping */
1585 if (ptrace_cancel_bpt(current))
1586 send_sig(SIGTRAP, current, 1);
1587 #endif
1588 unlock_user_struct(frame, frame_addr, 0);
1589 return env->regs[0];
1590
1591 badframe:
1592 unlock_user_struct(frame, frame_addr, 0);
1593 force_sig(TARGET_SIGSEGV /* , current */);
1594 return 0;
1595 }
1596
1597 static abi_ulong *restore_sigframe_v2_vfp(CPUARMState *env, abi_ulong *regspace)
1598 {
1599 int i;
1600 abi_ulong magic, sz;
1601 uint32_t fpscr, fpexc;
1602 struct target_vfp_sigframe *vfpframe;
1603 vfpframe = (struct target_vfp_sigframe *)regspace;
1604
1605 __get_user(magic, &vfpframe->magic);
1606 __get_user(sz, &vfpframe->size);
1607 if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) {
1608 return 0;
1609 }
1610 for (i = 0; i < 32; i++) {
1611 __get_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]);
1612 }
1613 __get_user(fpscr, &vfpframe->ufp.fpscr);
1614 vfp_set_fpscr(env, fpscr);
1615 __get_user(fpexc, &vfpframe->ufp_exc.fpexc);
1616 /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid
1617 * and the exception flag is cleared
1618 */
1619 fpexc |= (1 << 30);
1620 fpexc &= ~((1 << 31) | (1 << 28));
1621 env->vfp.xregs[ARM_VFP_FPEXC] = fpexc;
1622 __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
1623 __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
1624 return (abi_ulong*)(vfpframe + 1);
1625 }
1626
1627 static abi_ulong *restore_sigframe_v2_iwmmxt(CPUARMState *env,
1628 abi_ulong *regspace)
1629 {
1630 int i;
1631 abi_ulong magic, sz;
1632 struct target_iwmmxt_sigframe *iwmmxtframe;
1633 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
1634
1635 __get_user(magic, &iwmmxtframe->magic);
1636 __get_user(sz, &iwmmxtframe->size);
1637 if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) {
1638 return 0;
1639 }
1640 for (i = 0; i < 16; i++) {
1641 __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
1642 }
1643 __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
1644 __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
1645 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
1646 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
1647 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
1648 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
1649 return (abi_ulong*)(iwmmxtframe + 1);
1650 }
1651
1652 static int do_sigframe_return_v2(CPUARMState *env, target_ulong frame_addr,
1653 struct target_ucontext_v2 *uc)
1654 {
1655 sigset_t host_set;
1656 abi_ulong *regspace;
1657
1658 target_to_host_sigset(&host_set, &uc->tuc_sigmask);
1659 sigprocmask(SIG_SETMASK, &host_set, NULL);
1660
1661 if (restore_sigcontext(env, &uc->tuc_mcontext))
1662 return 1;
1663
1664 /* Restore coprocessor signal frame */
1665 regspace = uc->tuc_regspace;
1666 if (arm_feature(env, ARM_FEATURE_VFP)) {
1667 regspace = restore_sigframe_v2_vfp(env, regspace);
1668 if (!regspace) {
1669 return 1;
1670 }
1671 }
1672 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
1673 regspace = restore_sigframe_v2_iwmmxt(env, regspace);
1674 if (!regspace) {
1675 return 1;
1676 }
1677 }
1678
1679 if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1680 return 1;
1681
1682 #if 0
1683 /* Send SIGTRAP if we're single-stepping */
1684 if (ptrace_cancel_bpt(current))
1685 send_sig(SIGTRAP, current, 1);
1686 #endif
1687
1688 return 0;
1689 }
1690
1691 static long do_sigreturn_v2(CPUARMState *env)
1692 {
1693 abi_ulong frame_addr;
1694 struct sigframe_v2 *frame;
1695
1696 /*
1697 * Since we stacked the signal on a 64-bit boundary,
1698 * then 'sp' should be word aligned here. If it's
1699 * not, then the user is trying to mess with us.
1700 */
1701 if (env->regs[13] & 7)
1702 goto badframe;
1703
1704 frame_addr = env->regs[13];
1705 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1706 goto badframe;
1707
1708 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1709 goto badframe;
1710
1711 unlock_user_struct(frame, frame_addr, 0);
1712 return env->regs[0];
1713
1714 badframe:
1715 unlock_user_struct(frame, frame_addr, 0);
1716 force_sig(TARGET_SIGSEGV /* , current */);
1717 return 0;
1718 }
1719
1720 long do_sigreturn(CPUARMState *env)
1721 {
1722 if (get_osversion() >= 0x020612) {
1723 return do_sigreturn_v2(env);
1724 } else {
1725 return do_sigreturn_v1(env);
1726 }
1727 }
1728
1729 static long do_rt_sigreturn_v1(CPUARMState *env)
1730 {
1731 abi_ulong frame_addr;
1732 struct rt_sigframe_v1 *frame;
1733 sigset_t host_set;
1734
1735 /*
1736 * Since we stacked the signal on a 64-bit boundary,
1737 * then 'sp' should be word aligned here. If it's
1738 * not, then the user is trying to mess with us.
1739 */
1740 if (env->regs[13] & 7)
1741 goto badframe;
1742
1743 frame_addr = env->regs[13];
1744 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1745 goto badframe;
1746
1747 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
1748 sigprocmask(SIG_SETMASK, &host_set, NULL);
1749
1750 if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
1751 goto badframe;
1752
1753 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1754 goto badframe;
1755
1756 #if 0
1757 /* Send SIGTRAP if we're single-stepping */
1758 if (ptrace_cancel_bpt(current))
1759 send_sig(SIGTRAP, current, 1);
1760 #endif
1761 unlock_user_struct(frame, frame_addr, 0);
1762 return env->regs[0];
1763
1764 badframe:
1765 unlock_user_struct(frame, frame_addr, 0);
1766 force_sig(TARGET_SIGSEGV /* , current */);
1767 return 0;
1768 }
1769
1770 static long do_rt_sigreturn_v2(CPUARMState *env)
1771 {
1772 abi_ulong frame_addr;
1773 struct rt_sigframe_v2 *frame;
1774
1775 /*
1776 * Since we stacked the signal on a 64-bit boundary,
1777 * then 'sp' should be word aligned here. If it's
1778 * not, then the user is trying to mess with us.
1779 */
1780 if (env->regs[13] & 7)
1781 goto badframe;
1782
1783 frame_addr = env->regs[13];
1784 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1785 goto badframe;
1786
1787 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1788 goto badframe;
1789
1790 unlock_user_struct(frame, frame_addr, 0);
1791 return env->regs[0];
1792
1793 badframe:
1794 unlock_user_struct(frame, frame_addr, 0);
1795 force_sig(TARGET_SIGSEGV /* , current */);
1796 return 0;
1797 }
1798
1799 long do_rt_sigreturn(CPUARMState *env)
1800 {
1801 if (get_osversion() >= 0x020612) {
1802 return do_rt_sigreturn_v2(env);
1803 } else {
1804 return do_rt_sigreturn_v1(env);
1805 }
1806 }
1807
1808 #elif defined(TARGET_SPARC)
1809
1810 #define __SUNOS_MAXWIN 31
1811
1812 /* This is what SunOS does, so shall I. */
1813 struct target_sigcontext {
1814 abi_ulong sigc_onstack; /* state to restore */
1815
1816 abi_ulong sigc_mask; /* sigmask to restore */
1817 abi_ulong sigc_sp; /* stack pointer */
1818 abi_ulong sigc_pc; /* program counter */
1819 abi_ulong sigc_npc; /* next program counter */
1820 abi_ulong sigc_psr; /* for condition codes etc */
1821 abi_ulong sigc_g1; /* User uses these two registers */
1822 abi_ulong sigc_o0; /* within the trampoline code. */
1823
1824 /* Now comes information regarding the users window set
1825 * at the time of the signal.
1826 */
1827 abi_ulong sigc_oswins; /* outstanding windows */
1828
1829 /* stack ptrs for each regwin buf */
1830 char *sigc_spbuf[__SUNOS_MAXWIN];
1831
1832 /* Windows to restore after signal */
1833 struct {
1834 abi_ulong locals[8];
1835 abi_ulong ins[8];
1836 } sigc_wbuf[__SUNOS_MAXWIN];
1837 };
1838 /* A Sparc stack frame */
1839 struct sparc_stackf {
1840 abi_ulong locals[8];
1841 abi_ulong ins[8];
1842 /* It's simpler to treat fp and callers_pc as elements of ins[]
1843 * since we never need to access them ourselves.
1844 */
1845 char *structptr;
1846 abi_ulong xargs[6];
1847 abi_ulong xxargs[1];
1848 };
1849
1850 typedef struct {
1851 struct {
1852 abi_ulong psr;
1853 abi_ulong pc;
1854 abi_ulong npc;
1855 abi_ulong y;
1856 abi_ulong u_regs[16]; /* globals and ins */
1857 } si_regs;
1858 int si_mask;
1859 } __siginfo_t;
1860
1861 typedef struct {
1862 abi_ulong si_float_regs[32];
1863 unsigned long si_fsr;
1864 unsigned long si_fpqdepth;
1865 struct {
1866 unsigned long *insn_addr;
1867 unsigned long insn;
1868 } si_fpqueue [16];
1869 } qemu_siginfo_fpu_t;
1870
1871
1872 struct target_signal_frame {
1873 struct sparc_stackf ss;
1874 __siginfo_t info;
1875 abi_ulong fpu_save;
1876 abi_ulong insns[2] __attribute__ ((aligned (8)));
1877 abi_ulong extramask[TARGET_NSIG_WORDS - 1];
1878 abi_ulong extra_size; /* Should be 0 */
1879 qemu_siginfo_fpu_t fpu_state;
1880 };
1881 struct target_rt_signal_frame {
1882 struct sparc_stackf ss;
1883 siginfo_t info;
1884 abi_ulong regs[20];
1885 sigset_t mask;
1886 abi_ulong fpu_save;
1887 unsigned int insns[2];
1888 stack_t stack;
1889 unsigned int extra_size; /* Should be 0 */
1890 qemu_siginfo_fpu_t fpu_state;
1891 };
1892
1893 #define UREG_O0 16
1894 #define UREG_O6 22
1895 #define UREG_I0 0
1896 #define UREG_I1 1
1897 #define UREG_I2 2
1898 #define UREG_I3 3
1899 #define UREG_I4 4
1900 #define UREG_I5 5
1901 #define UREG_I6 6
1902 #define UREG_I7 7
1903 #define UREG_L0 8
1904 #define UREG_FP UREG_I6
1905 #define UREG_SP UREG_O6
1906
1907 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
1908 CPUSPARCState *env,
1909 unsigned long framesize)
1910 {
1911 abi_ulong sp;
1912
1913 sp = env->regwptr[UREG_FP];
1914
1915 /* This is the X/Open sanctioned signal stack switching. */
1916 if (sa->sa_flags & TARGET_SA_ONSTACK) {
1917 if (!on_sig_stack(sp)
1918 && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
1919 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1920 }
1921 return sp - framesize;
1922 }
1923
1924 static int
1925 setup___siginfo(__siginfo_t *si, CPUSPARCState *env, abi_ulong mask)
1926 {
1927 int err = 0, i;
1928
1929 err |= __put_user(env->psr, &si->si_regs.psr);
1930 err |= __put_user(env->pc, &si->si_regs.pc);
1931 err |= __put_user(env->npc, &si->si_regs.npc);
1932 err |= __put_user(env->y, &si->si_regs.y);
1933 for (i=0; i < 8; i++) {
1934 err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
1935 }
1936 for (i=0; i < 8; i++) {
1937 err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
1938 }
1939 err |= __put_user(mask, &si->si_mask);
1940 return err;
1941 }
1942
1943 #if 0
1944 static int
1945 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1946 CPUSPARCState *env, unsigned long mask)
1947 {
1948 int err = 0;
1949
1950 err |= __put_user(mask, &sc->sigc_mask);
1951 err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
1952 err |= __put_user(env->pc, &sc->sigc_pc);
1953 err |= __put_user(env->npc, &sc->sigc_npc);
1954 err |= __put_user(env->psr, &sc->sigc_psr);
1955 err |= __put_user(env->gregs[1], &sc->sigc_g1);
1956 err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
1957
1958 return err;
1959 }
1960 #endif
1961 #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
1962
1963 static void setup_frame(int sig, struct target_sigaction *ka,
1964 target_sigset_t *set, CPUSPARCState *env)
1965 {
1966 abi_ulong sf_addr;
1967 struct target_signal_frame *sf;
1968 int sigframe_size, err, i;
1969
1970 /* 1. Make sure everything is clean */
1971 //synchronize_user_stack();
1972
1973 sigframe_size = NF_ALIGNEDSZ;
1974 sf_addr = get_sigframe(ka, env, sigframe_size);
1975
1976 sf = lock_user(VERIFY_WRITE, sf_addr,
1977 sizeof(struct target_signal_frame), 0);
1978 if (!sf)
1979 goto sigsegv;
1980
1981 //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1982 #if 0
1983 if (invalid_frame_pointer(sf, sigframe_size))
1984 goto sigill_and_return;
1985 #endif
1986 /* 2. Save the current process state */
1987 err = setup___siginfo(&sf->info, env, set->sig[0]);
1988 err |= __put_user(0, &sf->extra_size);
1989
1990 //err |= save_fpu_state(regs, &sf->fpu_state);
1991 //err |= __put_user(&sf->fpu_state, &sf->fpu_save);
1992
1993 err |= __put_user(set->sig[0], &sf->info.si_mask);
1994 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
1995 err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
1996 }
1997
1998 for (i = 0; i < 8; i++) {
1999 err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
2000 }
2001 for (i = 0; i < 8; i++) {
2002 err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
2003 }
2004 if (err)
2005 goto sigsegv;
2006
2007 /* 3. signal handler back-trampoline and parameters */
2008 env->regwptr[UREG_FP] = sf_addr;
2009 env->regwptr[UREG_I0] = sig;
2010 env->regwptr[UREG_I1] = sf_addr +
2011 offsetof(struct target_signal_frame, info);
2012 env->regwptr[UREG_I2] = sf_addr +
2013 offsetof(struct target_signal_frame, info);
2014
2015 /* 4. signal handler */
2016 env->pc = ka->_sa_handler;
2017 env->npc = (env->pc + 4);
2018 /* 5. return to kernel instructions */
2019 if (ka->sa_restorer)
2020 env->regwptr[UREG_I7] = ka->sa_restorer;
2021 else {
2022 uint32_t val32;
2023
2024 env->regwptr[UREG_I7] = sf_addr +
2025 offsetof(struct target_signal_frame, insns) - 2 * 4;
2026
2027 /* mov __NR_sigreturn, %g1 */
2028 val32 = 0x821020d8;
2029 err |= __put_user(val32, &sf->insns[0]);
2030
2031 /* t 0x10 */
2032 val32 = 0x91d02010;
2033 err |= __put_user(val32, &sf->insns[1]);
2034 if (err)
2035 goto sigsegv;
2036
2037 /* Flush instruction space. */
2038 //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
2039 // tb_flush(env);
2040 }
2041 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
2042 return;
2043 #if 0
2044 sigill_and_return:
2045 force_sig(TARGET_SIGILL);
2046 #endif
2047 sigsegv:
2048 //fprintf(stderr, "force_sig\n");
2049 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
2050 force_sig(TARGET_SIGSEGV);
2051 }
2052 static inline int
2053 restore_fpu_state(CPUSPARCState *env, qemu_siginfo_fpu_t *fpu)
2054 {
2055 int err;
2056 #if 0
2057 #ifdef CONFIG_SMP
2058 if (current->flags & PF_USEDFPU)
2059 regs->psr &= ~PSR_EF;
2060 #else
2061 if (current == last_task_used_math) {
2062 last_task_used_math = 0;
2063 regs->psr &= ~PSR_EF;
2064 }
2065 #endif
2066 current->used_math = 1;
2067 current->flags &= ~PF_USEDFPU;
2068 #endif
2069 #if 0
2070 if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
2071 return -EFAULT;
2072 #endif
2073
2074 /* XXX: incorrect */
2075 err = copy_from_user(&env->fpr[0], fpu->si_float_regs[0],
2076 (sizeof(abi_ulong) * 32));
2077 err |= __get_user(env->fsr, &fpu->si_fsr);
2078 #if 0
2079 err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
2080 if (current->thread.fpqdepth != 0)
2081 err |= __copy_from_user(&current->thread.fpqueue[0],
2082 &fpu->si_fpqueue[0],
2083 ((sizeof(unsigned long) +
2084 (sizeof(unsigned long *)))*16));
2085 #endif
2086 return err;
2087 }
2088
2089
2090 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2091 target_siginfo_t *info,
2092 target_sigset_t *set, CPUSPARCState *env)
2093 {
2094 fprintf(stderr, "setup_rt_frame: not implemented\n");
2095 }
2096
2097 long do_sigreturn(CPUSPARCState *env)
2098 {
2099 abi_ulong sf_addr;
2100 struct target_signal_frame *sf;
2101 uint32_t up_psr, pc, npc;
2102 target_sigset_t set;
2103 sigset_t host_set;
2104 int err, i;
2105
2106 sf_addr = env->regwptr[UREG_FP];
2107 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1))
2108 goto segv_and_exit;
2109 #if 0
2110 fprintf(stderr, "sigreturn\n");
2111 fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
2112 #endif
2113 //cpu_dump_state(env, stderr, fprintf, 0);
2114
2115 /* 1. Make sure we are not getting garbage from the user */
2116
2117 if (sf_addr & 3)
2118 goto segv_and_exit;
2119
2120 err = __get_user(pc, &sf->info.si_regs.pc);
2121 err |= __get_user(npc, &sf->info.si_regs.npc);
2122
2123 if ((pc | npc) & 3)
2124 goto segv_and_exit;
2125
2126 /* 2. Restore the state */
2127 err |= __get_user(up_psr, &sf->info.si_regs.psr);
2128
2129 /* User can only change condition codes and FPU enabling in %psr. */
2130 env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
2131 | (env->psr & ~(PSR_ICC /* | PSR_EF */));
2132
2133 env->pc = pc;
2134 env->npc = npc;
2135 err |= __get_user(env->y, &sf->info.si_regs.y);
2136 for (i=0; i < 8; i++) {
2137 err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
2138 }
2139 for (i=0; i < 8; i++) {
2140 err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
2141 }
2142
2143 /* FIXME: implement FPU save/restore:
2144 * __get_user(fpu_save, &sf->fpu_save);
2145 * if (fpu_save)
2146 * err |= restore_fpu_state(env, fpu_save);
2147 */
2148
2149 /* This is pretty much atomic, no amount locking would prevent
2150 * the races which exist anyways.
2151 */
2152 err |= __get_user(set.sig[0], &sf->info.si_mask);
2153 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2154 err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
2155 }
2156
2157 target_to_host_sigset_internal(&host_set, &set);
2158 sigprocmask(SIG_SETMASK, &host_set, NULL);
2159
2160 if (err)
2161 goto segv_and_exit;
2162 unlock_user_struct(sf, sf_addr, 0);
2163 return env->regwptr[0];
2164
2165 segv_and_exit:
2166 unlock_user_struct(sf, sf_addr, 0);
2167 force_sig(TARGET_SIGSEGV);
2168 }
2169
2170 long do_rt_sigreturn(CPUSPARCState *env)
2171 {
2172 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2173 return -TARGET_ENOSYS;
2174 }
2175
2176 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
2177 #define MC_TSTATE 0
2178 #define MC_PC 1
2179 #define MC_NPC 2
2180 #define MC_Y 3
2181 #define MC_G1 4
2182 #define MC_G2 5
2183 #define MC_G3 6
2184 #define MC_G4 7
2185 #define MC_G5 8
2186 #define MC_G6 9
2187 #define MC_G7 10
2188 #define MC_O0 11
2189 #define MC_O1 12
2190 #define MC_O2 13
2191 #define MC_O3 14
2192 #define MC_O4 15
2193 #define MC_O5 16
2194 #define MC_O6 17
2195 #define MC_O7 18
2196 #define MC_NGREG 19
2197
2198 typedef abi_ulong target_mc_greg_t;
2199 typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
2200
2201 struct target_mc_fq {
2202 abi_ulong *mcfq_addr;
2203 uint32_t mcfq_insn;
2204 };
2205
2206 struct target_mc_fpu {
2207 union {
2208 uint32_t sregs[32];
2209 uint64_t dregs[32];
2210 //uint128_t qregs[16];
2211 } mcfpu_fregs;
2212 abi_ulong mcfpu_fsr;
2213 abi_ulong mcfpu_fprs;
2214 abi_ulong mcfpu_gsr;
2215 struct target_mc_fq *mcfpu_fq;
2216 unsigned char mcfpu_qcnt;
2217 unsigned char mcfpu_qentsz;
2218 unsigned char mcfpu_enab;
2219 };
2220 typedef struct target_mc_fpu target_mc_fpu_t;
2221
2222 typedef struct {
2223 target_mc_gregset_t mc_gregs;
2224 target_mc_greg_t mc_fp;
2225 target_mc_greg_t mc_i7;
2226 target_mc_fpu_t mc_fpregs;
2227 } target_mcontext_t;
2228
2229 struct target_ucontext {
2230 struct target_ucontext *tuc_link;
2231 abi_ulong tuc_flags;
2232 target_sigset_t tuc_sigmask;
2233 target_mcontext_t tuc_mcontext;
2234 };
2235
2236 /* A V9 register window */
2237 struct target_reg_window {
2238 abi_ulong locals[8];
2239 abi_ulong ins[8];
2240 };
2241
2242 #define TARGET_STACK_BIAS 2047
2243
2244 /* {set, get}context() needed for 64-bit SparcLinux userland. */
2245 void sparc64_set_context(CPUSPARCState *env)
2246 {
2247 abi_ulong ucp_addr;
2248 struct target_ucontext *ucp;
2249 target_mc_gregset_t *grp;
2250 abi_ulong pc, npc, tstate;
2251 abi_ulong fp, i7, w_addr;
2252 int err;
2253 unsigned int i;
2254
2255 ucp_addr = env->regwptr[UREG_I0];
2256 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1))
2257 goto do_sigsegv;
2258 grp = &ucp->tuc_mcontext.mc_gregs;
2259 err = __get_user(pc, &((*grp)[MC_PC]));
2260 err |= __get_user(npc, &((*grp)[MC_NPC]));
2261 if (err || ((pc | npc) & 3))
2262 goto do_sigsegv;
2263 if (env->regwptr[UREG_I1]) {
2264 target_sigset_t target_set;
2265 sigset_t set;
2266
2267 if (TARGET_NSIG_WORDS == 1) {
2268 if (__get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0]))
2269 goto do_sigsegv;
2270 } else {
2271 abi_ulong *src, *dst;
2272 src = ucp->tuc_sigmask.sig;
2273 dst = target_set.sig;
2274 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2275 i++, dst++, src++)
2276 err |= __get_user(*dst, src);
2277 if (err)
2278 goto do_sigsegv;
2279 }
2280 target_to_host_sigset_internal(&set, &target_set);
2281 sigprocmask(SIG_SETMASK, &set, NULL);
2282 }
2283 env->pc = pc;
2284 env->npc = npc;
2285 err |= __get_user(env->y, &((*grp)[MC_Y]));
2286 err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
2287 env->asi = (tstate >> 24) & 0xff;
2288 cpu_put_ccr(env, tstate >> 32);
2289 cpu_put_cwp64(env, tstate & 0x1f);
2290 err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
2291 err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
2292 err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
2293 err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
2294 err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
2295 err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
2296 err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
2297 err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
2298 err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
2299 err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
2300 err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
2301 err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
2302 err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
2303 err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
2304 err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
2305
2306 err |= __get_user(fp, &(ucp->tuc_mcontext.mc_fp));
2307 err |= __get_user(i7, &(ucp->tuc_mcontext.mc_i7));
2308
2309 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2310 if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2311 abi_ulong) != 0)
2312 goto do_sigsegv;
2313 if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2314 abi_ulong) != 0)
2315 goto do_sigsegv;
2316 /* FIXME this does not match how the kernel handles the FPU in
2317 * its sparc64_set_context implementation. In particular the FPU
2318 * is only restored if fenab is non-zero in:
2319 * __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab));
2320 */
2321 err |= __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs));
2322 {
2323 uint32_t *src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2324 for (i = 0; i < 64; i++, src++) {
2325 if (i & 1) {
2326 err |= __get_user(env->fpr[i/2].l.lower, src);
2327 } else {
2328 err |= __get_user(env->fpr[i/2].l.upper, src);
2329 }
2330 }
2331 }
2332 err |= __get_user(env->fsr,
2333 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr));
2334 err |= __get_user(env->gsr,
2335 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr));
2336 if (err)
2337 goto do_sigsegv;
2338 unlock_user_struct(ucp, ucp_addr, 0);
2339 return;
2340 do_sigsegv:
2341 unlock_user_struct(ucp, ucp_addr, 0);
2342 force_sig(TARGET_SIGSEGV);
2343 }
2344
2345 void sparc64_get_context(CPUSPARCState *env)
2346 {
2347 abi_ulong ucp_addr;
2348 struct target_ucontext *ucp;
2349 target_mc_gregset_t *grp;
2350 target_mcontext_t *mcp;
2351 abi_ulong fp, i7, w_addr;
2352 int err;
2353 unsigned int i;
2354 target_sigset_t target_set;
2355 sigset_t set;
2356
2357 ucp_addr = env->regwptr[UREG_I0];
2358 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0))
2359 goto do_sigsegv;
2360
2361 mcp = &ucp->tuc_mcontext;
2362 grp = &mcp->mc_gregs;
2363
2364 /* Skip over the trap instruction, first. */
2365 env->pc = env->npc;
2366 env->npc += 4;
2367
2368 err = 0;
2369
2370 sigprocmask(0, NULL, &set);
2371 host_to_target_sigset_internal(&target_set, &set);
2372 if (TARGET_NSIG_WORDS == 1) {
2373 err |= __put_user(target_set.sig[0],
2374 (abi_ulong *)&ucp->tuc_sigmask);
2375 } else {
2376 abi_ulong *src, *dst;
2377 src = target_set.sig;
2378 dst = ucp->tuc_sigmask.sig;
2379 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2380 i++, dst++, src++)
2381 err |= __put_user(*src, dst);
2382 if (err)
2383 goto do_sigsegv;
2384 }
2385
2386 /* XXX: tstate must be saved properly */
2387 // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
2388 err |= __put_user(env->pc, &((*grp)[MC_PC]));
2389 err |= __put_user(env->npc, &((*grp)[MC_NPC]));
2390 err |= __put_user(env->y, &((*grp)[MC_Y]));
2391 err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
2392 err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
2393 err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
2394 err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
2395 err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
2396 err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
2397 err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
2398 err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
2399 err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
2400 err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
2401 err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
2402 err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
2403 err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
2404 err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
2405 err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
2406
2407 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2408 fp = i7 = 0;
2409 if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2410 abi_ulong) != 0)
2411 goto do_sigsegv;
2412 if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2413 abi_ulong) != 0)
2414 goto do_sigsegv;
2415 err |= __put_user(fp, &(mcp->mc_fp));
2416 err |= __put_user(i7, &(mcp->mc_i7));
2417
2418 {
2419 uint32_t *dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2420 for (i = 0; i < 64; i++, dst++) {
2421 if (i & 1) {
2422 err |= __put_user(env->fpr[i/2].l.lower, dst);
2423 } else {
2424 err |= __put_user(env->fpr[i/2].l.upper, dst);
2425 }
2426 }
2427 }
2428 err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
2429 err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
2430 err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
2431
2432 if (err)
2433 goto do_sigsegv;
2434 unlock_user_struct(ucp, ucp_addr, 1);
2435 return;
2436 do_sigsegv:
2437 unlock_user_struct(ucp, ucp_addr, 1);
2438 force_sig(TARGET_SIGSEGV);
2439 }
2440 #endif
2441 #elif defined(TARGET_MIPS) || defined(TARGET_MIPS64)
2442
2443 # if defined(TARGET_ABI_MIPSO32)
2444 struct target_sigcontext {
2445 uint32_t sc_regmask; /* Unused */
2446 uint32_t sc_status;
2447 uint64_t sc_pc;
2448 uint64_t sc_regs[32];
2449 uint64_t sc_fpregs[32];
2450 uint32_t sc_ownedfp; /* Unused */
2451 uint32_t sc_fpc_csr;
2452 uint32_t sc_fpc_eir; /* Unused */
2453 uint32_t sc_used_math;
2454 uint32_t sc_dsp; /* dsp status, was sc_ssflags */
2455 uint32_t pad0;
2456 uint64_t sc_mdhi;
2457 uint64_t sc_mdlo;
2458 target_ulong sc_hi1; /* Was sc_cause */
2459 target_ulong sc_lo1; /* Was sc_badvaddr */
2460 target_ulong sc_hi2; /* Was sc_sigset[4] */
2461 target_ulong sc_lo2;
2462 target_ulong sc_hi3;
2463 target_ulong sc_lo3;
2464 };
2465 # else /* N32 || N64 */
2466 struct target_sigcontext {
2467 uint64_t sc_regs[32];
2468 uint64_t sc_fpregs[32];
2469 uint64_t sc_mdhi;
2470 uint64_t sc_hi1;
2471 uint64_t sc_hi2;
2472 uint64_t sc_hi3;
2473 uint64_t sc_mdlo;
2474 uint64_t sc_lo1;
2475 uint64_t sc_lo2;
2476 uint64_t sc_lo3;
2477 uint64_t sc_pc;
2478 uint32_t sc_fpc_csr;
2479 uint32_t sc_used_math;
2480 uint32_t sc_dsp;
2481 uint32_t sc_reserved;
2482 };
2483 # endif /* O32 */
2484
2485 struct sigframe {
2486 uint32_t sf_ass[4]; /* argument save space for o32 */
2487 uint32_t sf_code[2]; /* signal trampoline */
2488 struct target_sigcontext sf_sc;
2489 target_sigset_t sf_mask;
2490 };
2491
2492 struct target_ucontext {
2493 target_ulong tuc_flags;
2494 target_ulong tuc_link;
2495 target_stack_t tuc_stack;
2496 target_ulong pad0;
2497 struct target_sigcontext tuc_mcontext;
2498 target_sigset_t tuc_sigmask;
2499 };
2500
2501 struct target_rt_sigframe {
2502 uint32_t rs_ass[4]; /* argument save space for o32 */
2503 uint32_t rs_code[2]; /* signal trampoline */
2504 struct target_siginfo rs_info;
2505 struct target_ucontext rs_uc;
2506 };
2507
2508 /* Install trampoline to jump back from signal handler */
2509 static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
2510 {
2511 int err = 0;
2512
2513 /*
2514 * Set up the return code ...
2515 *
2516 * li v0, __NR__foo_sigreturn
2517 * syscall
2518 */
2519
2520 err |= __put_user(0x24020000 + syscall, tramp + 0);
2521 err |= __put_user(0x0000000c , tramp + 1);
2522 return err;
2523 }
2524
2525 static inline int
2526 setup_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc)
2527 {
2528 int err = 0;
2529 int i;
2530
2531 err |= __put_user(exception_resume_pc(regs), &sc->sc_pc);
2532 regs->hflags &= ~MIPS_HFLAG_BMASK;
2533
2534 __put_user(0, &sc->sc_regs[0]);
2535 for (i = 1; i < 32; ++i) {
2536 err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
2537 }
2538
2539 err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2540 err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2541
2542 /* Rather than checking for dsp existence, always copy. The storage
2543 would just be garbage otherwise. */
2544 err |= __put_user(regs->active_tc.HI[1], &sc->sc_hi1);
2545 err |= __put_user(regs->active_tc.HI[2], &sc->sc_hi2);
2546 err |= __put_user(regs->active_tc.HI[3], &sc->sc_hi3);
2547 err |= __put_user(regs->active_tc.LO[1], &sc->sc_lo1);
2548 err |= __put_user(regs->active_tc.LO[2], &sc->sc_lo2);
2549 err |= __put_user(regs->active_tc.LO[3], &sc->sc_lo3);
2550 {
2551 uint32_t dsp = cpu_rddsp(0x3ff, regs);
2552 err |= __put_user(dsp, &sc->sc_dsp);
2553 }
2554
2555 err |= __put_user(1, &sc->sc_used_math);
2556
2557 for (i = 0; i < 32; ++i) {
2558 err |= __put_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
2559 }
2560
2561 return err;
2562 }
2563
2564 static inline int
2565 restore_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc)
2566 {
2567 int err = 0;
2568 int i;
2569
2570 err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
2571
2572 err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2573 err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2574
2575 for (i = 1; i < 32; ++i) {
2576 err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
2577 }
2578
2579 err |= __get_user(regs->active_tc.HI[1], &sc->sc_hi1);
2580 err |= __get_user(regs->active_tc.HI[2], &sc->sc_hi2);
2581 err |= __get_user(regs->active_tc.HI[3], &sc->sc_hi3);
2582 err |= __get_user(regs->active_tc.LO[1], &sc->sc_lo1);
2583 err |= __get_user(regs->active_tc.LO[2], &sc->sc_lo2);
2584 err |= __get_user(regs->active_tc.LO[3], &sc->sc_lo3);
2585 {
2586 uint32_t dsp;
2587 err |= __get_user(dsp, &sc->sc_dsp);
2588 cpu_wrdsp(dsp, 0x3ff, regs);
2589 }
2590
2591 for (i = 0; i < 32; ++i) {
2592 err |= __get_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
2593 }
2594
2595 return err;
2596 }
2597
2598 /*
2599 * Determine which stack to use..
2600 */
2601 static inline abi_ulong
2602 get_sigframe(struct target_sigaction *ka, CPUMIPSState *regs, size_t frame_size)
2603 {
2604 unsigned long sp;
2605
2606 /* Default to using normal stack */
2607 sp = regs->active_tc.gpr[29];
2608
2609 /*
2610 * FPU emulator may have its own trampoline active just
2611 * above the user stack, 16-bytes before the next lowest
2612 * 16 byte boundary. Try to avoid trashing it.
2613 */
2614 sp -= 32;
2615
2616 /* This is the X/Open sanctioned signal stack switching. */
2617 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
2618 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2619 }
2620
2621 return (sp - frame_size) & ~7;
2622 }
2623
2624 static void mips_set_hflags_isa_mode_from_pc(CPUMIPSState *env)
2625 {
2626 if (env->insn_flags & (ASE_MIPS16 | ASE_MICROMIPS)) {
2627 env->hflags &= ~MIPS_HFLAG_M16;
2628 env->hflags |= (env->active_tc.PC & 1) << MIPS_HFLAG_M16_SHIFT;
2629 env->active_tc.PC &= ~(target_ulong) 1;
2630 }
2631 }
2632
2633 # if defined(TARGET_ABI_MIPSO32)
2634 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */
2635 static void setup_frame(int sig, struct target_sigaction * ka,
2636 target_sigset_t *set, CPUMIPSState *regs)
2637 {
2638 struct sigframe *frame;
2639 abi_ulong frame_addr;
2640 int i;
2641
2642 frame_addr = get_sigframe(ka, regs, sizeof(*frame));
2643 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2644 goto give_sigsegv;
2645
2646 install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
2647
2648 if(setup_sigcontext(regs, &frame->sf_sc))
2649 goto give_sigsegv;
2650
2651 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2652 if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
2653 goto give_sigsegv;
2654 }
2655
2656 /*
2657 * Arguments to signal handler:
2658 *
2659 * a0 = signal number
2660 * a1 = 0 (should be cause)
2661 * a2 = pointer to struct sigcontext
2662 *
2663 * $25 and PC point to the signal handler, $29 points to the
2664 * struct sigframe.
2665 */
2666 regs->active_tc.gpr[ 4] = sig;
2667 regs->active_tc.gpr[ 5] = 0;
2668 regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
2669 regs->active_tc.gpr[29] = frame_addr;
2670 regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
2671 /* The original kernel code sets CP0_EPC to the handler
2672 * since it returns to userland using eret
2673 * we cannot do this here, and we must set PC directly */
2674 regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
2675 mips_set_hflags_isa_mode_from_pc(regs);
2676 unlock_user_struct(frame, frame_addr, 1);
2677 return;
2678
2679 give_sigsegv:
2680 unlock_user_struct(frame, frame_addr, 1);
2681 force_sig(TARGET_SIGSEGV/*, current*/);
2682 }
2683
2684 long do_sigreturn(CPUMIPSState *regs)
2685 {
2686 struct sigframe *frame;
2687 abi_ulong frame_addr;
2688 sigset_t blocked;
2689 target_sigset_t target_set;
2690 int i;
2691
2692 #if defined(DEBUG_SIGNAL)
2693 fprintf(stderr, "do_sigreturn\n");
2694 #endif
2695 frame_addr = regs->active_tc.gpr[29];
2696 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2697 goto badframe;
2698
2699 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2700 if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
2701 goto badframe;
2702 }
2703
2704 target_to_host_sigset_internal(&blocked, &target_set);
2705 sigprocmask(SIG_SETMASK, &blocked, NULL);
2706
2707 if (restore_sigcontext(regs, &frame->sf_sc))
2708 goto badframe;
2709
2710 #if 0
2711 /*
2712 * Don't let your children do this ...
2713 */
2714 __asm__ __volatile__(
2715 "move\t$29, %0\n\t"
2716 "j\tsyscall_exit"
2717 :/* no outputs */
2718 :"r" (&regs));
2719 /* Unreached */
2720 #endif
2721
2722 regs->active_tc.PC = regs->CP0_EPC;
2723 mips_set_hflags_isa_mode_from_pc(regs);
2724 /* I am not sure this is right, but it seems to work
2725 * maybe a problem with nested signals ? */
2726 regs->CP0_EPC = 0;
2727 return -TARGET_QEMU_ESIGRETURN;
2728
2729 badframe:
2730 force_sig(TARGET_SIGSEGV/*, current*/);
2731 return 0;
2732 }
2733 # endif /* O32 */
2734
2735 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2736 target_siginfo_t *info,
2737 target_sigset_t *set, CPUMIPSState *env)
2738 {
2739 struct target_rt_sigframe *frame;
2740 abi_ulong frame_addr;
2741 int i;
2742
2743 frame_addr = get_sigframe(ka, env, sizeof(*frame));
2744 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2745 goto give_sigsegv;
2746
2747 install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn);
2748
2749 copy_siginfo_to_user(&frame->rs_info, info);
2750
2751 __put_user(0, &frame->rs_uc.tuc_flags);
2752 __put_user(0, &frame->rs_uc.tuc_link);
2753 __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp);
2754 __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size);
2755 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
2756 &frame->rs_uc.tuc_stack.ss_flags);
2757
2758 setup_sigcontext(env, &frame->rs_uc.tuc_mcontext);
2759
2760 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2761 __put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]);
2762 }
2763
2764 /*
2765 * Arguments to signal handler:
2766 *
2767 * a0 = signal number
2768 * a1 = pointer to siginfo_t
2769 * a2 = pointer to struct ucontext
2770 *
2771 * $25 and PC point to the signal handler, $29 points to the
2772 * struct sigframe.
2773 */
2774 env->active_tc.gpr[ 4] = sig;
2775 env->active_tc.gpr[ 5] = frame_addr
2776 + offsetof(struct target_rt_sigframe, rs_info);
2777 env->active_tc.gpr[ 6] = frame_addr
2778 + offsetof(struct target_rt_sigframe, rs_uc);
2779 env->active_tc.gpr[29] = frame_addr;
2780 env->active_tc.gpr[31] = frame_addr
2781 + offsetof(struct target_rt_sigframe, rs_code);
2782 /* The original kernel code sets CP0_EPC to the handler
2783 * since it returns to userland using eret
2784 * we cannot do this here, and we must set PC directly */
2785 env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
2786 mips_set_hflags_isa_mode_from_pc(env);
2787 unlock_user_struct(frame, frame_addr, 1);
2788 return;
2789
2790 give_sigsegv:
2791 unlock_user_struct(frame, frame_addr, 1);
2792 force_sig(TARGET_SIGSEGV/*, current*/);
2793 }
2794
2795 long do_rt_sigreturn(CPUMIPSState *env)
2796 {
2797 struct target_rt_sigframe *frame;
2798 abi_ulong frame_addr;
2799 sigset_t blocked;
2800
2801 #if defined(DEBUG_SIGNAL)
2802 fprintf(stderr, "do_rt_sigreturn\n");
2803 #endif
2804 frame_addr = env->active_tc.gpr[29];
2805 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2806 goto badframe;
2807
2808 target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask);
2809 sigprocmask(SIG_SETMASK, &blocked, NULL);
2810
2811 if (restore_sigcontext(env, &frame->rs_uc.tuc_mcontext))
2812 goto badframe;
2813
2814 if (do_sigaltstack(frame_addr +
2815 offsetof(struct target_rt_sigframe, rs_uc.tuc_stack),
2816 0, get_sp_from_cpustate(env)) == -EFAULT)
2817 goto badframe;
2818
2819 env->active_tc.PC = env->CP0_EPC;
2820 mips_set_hflags_isa_mode_from_pc(env);
2821 /* I am not sure this is right, but it seems to work
2822 * maybe a problem with nested signals ? */
2823 env->CP0_EPC = 0;
2824 return -TARGET_QEMU_ESIGRETURN;
2825
2826 badframe:
2827 force_sig(TARGET_SIGSEGV/*, current*/);
2828 return 0;
2829 }
2830
2831 #elif defined(TARGET_SH4)
2832
2833 /*
2834 * code and data structures from linux kernel:
2835 * include/asm-sh/sigcontext.h
2836 * arch/sh/kernel/signal.c
2837 */
2838
2839 struct target_sigcontext {
2840 target_ulong oldmask;
2841
2842 /* CPU registers */
2843 target_ulong sc_gregs[16];
2844 target_ulong sc_pc;
2845 target_ulong sc_pr;
2846 target_ulong sc_sr;
2847 target_ulong sc_gbr;
2848 target_ulong sc_mach;
2849 target_ulong sc_macl;
2850
2851 /* FPU registers */
2852 target_ulong sc_fpregs[16];
2853 target_ulong sc_xfpregs[16];
2854 unsigned int sc_fpscr;
2855 unsigned int sc_fpul;
2856 unsigned int sc_ownedfp;
2857 };
2858
2859 struct target_sigframe
2860 {
2861 struct target_sigcontext sc;
2862 target_ulong extramask[TARGET_NSIG_WORDS-1];
2863 uint16_t retcode[3];
2864 };
2865
2866
2867 struct target_ucontext {
2868 target_ulong tuc_flags;
2869 struct target_ucontext *tuc_link;
2870 target_stack_t tuc_stack;
2871 struct target_sigcontext tuc_mcontext;
2872 target_sigset_t tuc_sigmask; /* mask last for extensibility */
2873 };
2874
2875 struct target_rt_sigframe
2876 {
2877 struct target_siginfo info;
2878 struct target_ucontext uc;
2879 uint16_t retcode[3];
2880 };
2881
2882
2883 #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
2884 #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
2885
2886 static abi_ulong get_sigframe(struct target_sigaction *ka,
2887 unsigned long sp, size_t frame_size)
2888 {
2889 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
2890 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2891 }
2892
2893 return (sp - frame_size) & -8ul;
2894 }
2895
2896 static int setup_sigcontext(struct target_sigcontext *sc,
2897 CPUSH4State *regs, unsigned long mask)
2898 {
2899 int err = 0;
2900 int i;
2901
2902 #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
2903 COPY(gregs[0]); COPY(gregs[1]);
2904 COPY(gregs[2]); COPY(gregs[3]);
2905 COPY(gregs[4]); COPY(gregs[5]);
2906 COPY(gregs[6]); COPY(gregs[7]);
2907 COPY(gregs[8]); COPY(gregs[9]);
2908 COPY(gregs[10]); COPY(gregs[11]);
2909 COPY(gregs[12]); COPY(gregs[13]);
2910 COPY(gregs[14]); COPY(gregs[15]);
2911 COPY(gbr); COPY(mach);
2912 COPY(macl); COPY(pr);
2913 COPY(sr); COPY(pc);
2914 #undef COPY
2915
2916 for (i=0; i<16; i++) {
2917 err |= __put_user(regs->fregs[i], &sc->sc_fpregs[i]);
2918 }
2919 err |= __put_user(regs->fpscr, &sc->sc_fpscr);
2920 err |= __put_user(regs->fpul, &sc->sc_fpul);
2921
2922 /* non-iBCS2 extensions.. */
2923 err |= __put_user(mask, &sc->oldmask);
2924
2925 return err;
2926 }
2927
2928 static int restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc,
2929 target_ulong *r0_p)
2930 {
2931 unsigned int err = 0;
2932 int i;
2933
2934 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
2935 COPY(gregs[1]);
2936 COPY(gregs[2]); COPY(gregs[3]);
2937 COPY(gregs[4]); COPY(gregs[5]);
2938 COPY(gregs[6]); COPY(gregs[7]);
2939 COPY(gregs[8]); COPY(gregs[9]);
2940 COPY(gregs[10]); COPY(gregs[11]);
2941 COPY(gregs[12]); COPY(gregs[13]);
2942 COPY(gregs[14]); COPY(gregs[15]);
2943 COPY(gbr); COPY(mach);
2944 COPY(macl); COPY(pr);
2945 COPY(sr); COPY(pc);
2946 #undef COPY
2947
2948 for (i=0; i<16; i++) {
2949 err |= __get_user(regs->fregs[i], &sc->sc_fpregs[i]);
2950 }
2951 err |= __get_user(regs->fpscr, &sc->sc_fpscr);
2952 err |= __get_user(regs->fpul, &sc->sc_fpul);
2953
2954 regs->tra = -1; /* disable syscall checks */
2955 err |= __get_user(*r0_p, &sc->sc_gregs[0]);
2956 return err;
2957 }
2958
2959 static void setup_frame(int sig, struct target_sigaction *ka,
2960 target_sigset_t *set, CPUSH4State *regs)
2961 {
2962 struct target_sigframe *frame;
2963 abi_ulong frame_addr;
2964 int i;
2965 int err = 0;
2966 int signal;
2967
2968 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
2969 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2970 goto give_sigsegv;
2971
2972 signal = current_exec_domain_sig(sig);
2973
2974 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
2975
2976 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
2977 err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
2978 }
2979
2980 /* Set up to return from userspace. If provided, use a stub
2981 already in userspace. */
2982 if (ka->sa_flags & TARGET_SA_RESTORER) {
2983 regs->pr = (unsigned long) ka->sa_restorer;
2984 } else {
2985 /* Generate return code (system call to sigreturn) */
2986 err |= __put_user(MOVW(2), &frame->retcode[0]);
2987 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
2988 err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
2989 regs->pr = (unsigned long) frame->retcode;
2990 }
2991
2992 if (err)
2993 goto give_sigsegv;
2994
2995 /* Set up registers for signal handler */
2996 regs->gregs[15] = frame_addr;
2997 regs->gregs[4] = signal; /* Arg for signal handler */
2998 regs->gregs[5] = 0;
2999 regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc);
3000 regs->pc = (unsigned long) ka->_sa_handler;
3001
3002 unlock_user_struct(frame, frame_addr, 1);
3003 return;
3004
3005 give_sigsegv:
3006 unlock_user_struct(frame, frame_addr, 1);
3007 force_sig(TARGET_SIGSEGV);
3008 }
3009
3010 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3011 target_siginfo_t *info,
3012 target_sigset_t *set, CPUSH4State *regs)
3013 {
3014 struct target_rt_sigframe *frame;
3015 abi_ulong frame_addr;
3016 int i;
3017 int err = 0;
3018 int signal;
3019
3020 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
3021 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3022 goto give_sigsegv;
3023
3024 signal = current_exec_domain_sig(sig);
3025
3026 err |= copy_siginfo_to_user(&frame->info, info);
3027
3028 /* Create the ucontext. */
3029 err |= __put_user(0, &frame->uc.tuc_flags);
3030 err |= __put_user(0, (unsigned long *)&frame->uc.tuc_link);
3031 err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp,
3032 &frame->uc.tuc_stack.ss_sp);
3033 err |= __put_user(sas_ss_flags(regs->gregs[15]),
3034 &frame->uc.tuc_stack.ss_flags);
3035 err |= __put_user(target_sigaltstack_used.ss_size,
3036 &frame->uc.tuc_stack.ss_size);
3037 err |= setup_sigcontext(&frame->uc.tuc_mcontext,
3038 regs, set->sig[0]);
3039 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
3040 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
3041 }
3042
3043 /* Set up to return from userspace. If provided, use a stub
3044 already in userspace. */
3045 if (ka->sa_flags & TARGET_SA_RESTORER) {
3046 regs->pr = (unsigned long) ka->sa_restorer;
3047 } else {
3048 /* Generate return code (system call to sigreturn) */
3049 err |= __put_user(MOVW(2), &frame->retcode[0]);
3050 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
3051 err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
3052 regs->pr = (unsigned long) frame->retcode;
3053 }
3054
3055 if (err)
3056 goto give_sigsegv;
3057
3058 /* Set up registers for signal handler */
3059 regs->gregs[15] = frame_addr;
3060 regs->gregs[4] = signal; /* Arg for signal handler */
3061 regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info);
3062 regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc);
3063 regs->pc = (unsigned long) ka->_sa_handler;
3064
3065 unlock_user_struct(frame, frame_addr, 1);
3066 return;
3067
3068 give_sigsegv:
3069 unlock_user_struct(frame, frame_addr, 1);
3070 force_sig(TARGET_SIGSEGV);
3071 }
3072
3073 long do_sigreturn(CPUSH4State *regs)
3074 {
3075 struct target_sigframe *frame;
3076 abi_ulong frame_addr;
3077 sigset_t blocked;
3078 target_sigset_t target_set;
3079 target_ulong r0;
3080 int i;
3081 int err = 0;
3082
3083 #if defined(DEBUG_SIGNAL)
3084 fprintf(stderr, "do_sigreturn\n");
3085 #endif
3086 frame_addr = regs->gregs[15];
3087 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3088 goto badframe;
3089
3090 err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
3091 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3092 err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
3093 }
3094
3095 if (err)
3096 goto badframe;
3097
3098 target_to_host_sigset_internal(&blocked, &target_set);
3099 sigprocmask(SIG_SETMASK, &blocked, NULL);
3100
3101 if (restore_sigcontext(regs, &frame->sc, &r0))
3102 goto badframe;
3103
3104 unlock_user_struct(frame, frame_addr, 0);
3105 return r0;
3106
3107 badframe:
3108 unlock_user_struct(frame, frame_addr, 0);
3109 force_sig(TARGET_SIGSEGV);
3110 return 0;
3111 }
3112
3113 long do_rt_sigreturn(CPUSH4State *regs)
3114 {
3115 struct target_rt_sigframe *frame;
3116 abi_ulong frame_addr;
3117 sigset_t blocked;
3118 target_ulong r0;
3119
3120 #if defined(DEBUG_SIGNAL)
3121 fprintf(stderr, "do_rt_sigreturn\n");
3122 #endif
3123 frame_addr = regs->gregs[15];
3124 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3125 goto badframe;
3126
3127 target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask);
3128 sigprocmask(SIG_SETMASK, &blocked, NULL);
3129
3130 if (restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0))
3131 goto badframe;
3132
3133 if (do_sigaltstack(frame_addr +
3134 offsetof(struct target_rt_sigframe, uc.tuc_stack),
3135 0, get_sp_from_cpustate(regs)) == -EFAULT)
3136 goto badframe;
3137
3138 unlock_user_struct(frame, frame_addr, 0);
3139 return r0;
3140
3141 badframe:
3142 unlock_user_struct(frame, frame_addr, 0);
3143 force_sig(TARGET_SIGSEGV);
3144 return 0;
3145 }
3146 #elif defined(TARGET_MICROBLAZE)
3147
3148 struct target_sigcontext {
3149 struct target_pt_regs regs; /* needs to be first */
3150 uint32_t oldmask;
3151 };
3152
3153 struct target_stack_t {
3154 abi_ulong ss_sp;
3155 int ss_flags;
3156 unsigned int ss_size;
3157 };
3158
3159 struct target_ucontext {
3160 abi_ulong tuc_flags;
3161 abi_ulong tuc_link;
3162 struct target_stack_t tuc_stack;
3163 struct target_sigcontext tuc_mcontext;
3164 uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1];
3165 };
3166
3167 /* Signal frames. */
3168 struct target_signal_frame {
3169 struct target_ucontext uc;
3170 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3171 uint32_t tramp[2];
3172 };
3173
3174 struct rt_signal_frame {
3175 siginfo_t info;
3176 struct ucontext uc;
3177 uint32_t tramp[2];
3178 };
3179
3180 static void setup_sigcontext(struct target_sigcontext *sc, CPUMBState *env)
3181 {
3182 __put_user(env->regs[0], &sc->regs.r0);
3183 __put_user(env->regs[1], &sc->regs.r1);
3184 __put_user(env->regs[2], &sc->regs.r2);
3185 __put_user(env->regs[3], &sc->regs.r3);
3186 __put_user(env->regs[4], &sc->regs.r4);
3187 __put_user(env->regs[5], &sc->regs.r5);
3188 __put_user(env->regs[6], &sc->regs.r6);
3189 __put_user(env->regs[7], &sc->regs.r7);
3190 __put_user(env->regs[8], &sc->regs.r8);
3191 __put_user(env->regs[9], &sc->regs.r9);
3192 __put_user(env->regs[10], &sc->regs.r10);
3193 __put_user(env->regs[11], &sc->regs.r11);
3194 __put_user(env->regs[12], &sc->regs.r12);
3195 __put_user(env->regs[13], &sc->regs.r13);
3196 __put_user(env->regs[14], &sc->regs.r14);
3197 __put_user(env->regs[15], &sc->regs.r15);
3198 __put_user(env->regs[16], &sc->regs.r16);
3199 __put_user(env->regs[17], &sc->regs.r17);
3200 __put_user(env->regs[18], &sc->regs.r18);
3201 __put_user(env->regs[19], &sc->regs.r19);
3202 __put_user(env->regs[20], &sc->regs.r20);
3203 __put_user(env->regs[21], &sc->regs.r21);
3204 __put_user(env->regs[22], &sc->regs.r22);
3205 __put_user(env->regs[23], &sc->regs.r23);
3206 __put_user(env->regs[24], &sc->regs.r24);
3207 __put_user(env->regs[25], &sc->regs.r25);
3208 __put_user(env->regs[26], &sc->regs.r26);
3209 __put_user(env->regs[27], &sc->regs.r27);
3210 __put_user(env->regs[28], &sc->regs.r28);
3211 __put_user(env->regs[29], &sc->regs.r29);
3212 __put_user(env->regs[30], &sc->regs.r30);
3213 __put_user(env->regs[31], &sc->regs.r31);
3214 __put_user(env->sregs[SR_PC], &sc->regs.pc);
3215 }
3216
3217 static void restore_sigcontext(struct target_sigcontext *sc, CPUMBState *env)
3218 {
3219 __get_user(env->regs[0], &sc->regs.r0);
3220 __get_user(env->regs[1], &sc->regs.r1);
3221 __get_user(env->regs[2], &sc->regs.r2);
3222 __get_user(env->regs[3], &sc->regs.r3);
3223 __get_user(env->regs[4], &sc->regs.r4);
3224 __get_user(env->regs[5], &sc->regs.r5);
3225 __get_user(env->regs[6], &sc->regs.r6);
3226 __get_user(env->regs[7], &sc->regs.r7);
3227 __get_user(env->regs[8], &sc->regs.r8);
3228 __get_user(env->regs[9], &sc->regs.r9);
3229 __get_user(env->regs[10], &sc->regs.r10);
3230 __get_user(env->regs[11], &sc->regs.r11);
3231 __get_user(env->regs[12], &sc->regs.r12);
3232 __get_user(env->regs[13], &sc->regs.r13);
3233 __get_user(env->regs[14], &sc->regs.r14);
3234 __get_user(env->regs[15], &sc->regs.r15);
3235 __get_user(env->regs[16], &sc->regs.r16);
3236 __get_user(env->regs[17], &sc->regs.r17);
3237 __get_user(env->regs[18], &sc->regs.r18);
3238 __get_user(env->regs[19], &sc->regs.r19);
3239 __get_user(env->regs[20], &sc->regs.r20);
3240 __get_user(env->regs[21], &sc->regs.r21);
3241 __get_user(env->regs[22], &sc->regs.r22);
3242 __get_user(env->regs[23], &sc->regs.r23);
3243 __get_user(env->regs[24], &sc->regs.r24);
3244 __get_user(env->regs[25], &sc->regs.r25);
3245 __get_user(env->regs[26], &sc->regs.r26);
3246 __get_user(env->regs[27], &sc->regs.r27);
3247 __get_user(env->regs[28], &sc->regs.r28);
3248 __get_user(env->regs[29], &sc->regs.r29);
3249 __get_user(env->regs[30], &sc->regs.r30);
3250 __get_user(env->regs[31], &sc->regs.r31);
3251 __get_user(env->sregs[SR_PC], &sc->regs.pc);
3252 }
3253
3254 static abi_ulong get_sigframe(struct target_sigaction *ka,
3255 CPUMBState *env, int frame_size)
3256 {
3257 abi_ulong sp = env->regs[1];
3258
3259 if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp))
3260 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3261
3262 return ((sp - frame_size) & -8UL);
3263 }
3264
3265 static void setup_frame(int sig, struct target_sigaction *ka,
3266 target_sigset_t *set, CPUMBState *env)
3267 {
3268 struct target_signal_frame *frame;
3269 abi_ulong frame_addr;
3270 int err = 0;
3271 int i;
3272
3273 frame_addr = get_sigframe(ka, env, sizeof *frame);
3274 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3275 goto badframe;
3276
3277 /* Save the mask. */
3278 err |= __put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask);
3279 if (err)
3280 goto badframe;
3281
3282 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3283 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
3284 goto badframe;
3285 }
3286
3287 setup_sigcontext(&frame->uc.tuc_mcontext, env);
3288
3289 /* Set up to return from userspace. If provided, use a stub
3290 already in userspace. */
3291 /* minus 8 is offset to cater for "rtsd r15,8" offset */
3292 if (ka->sa_flags & TARGET_SA_RESTORER) {
3293 env->regs[15] = ((unsigned long)ka->sa_restorer)-8;
3294 } else {
3295 uint32_t t;
3296 /* Note, these encodings are _big endian_! */
3297 /* addi r12, r0, __NR_sigreturn */
3298 t = 0x31800000UL | TARGET_NR_sigreturn;
3299 err |= __put_user(t, frame->tramp + 0);
3300 /* brki r14, 0x8 */
3301 t = 0xb9cc0008UL;
3302 err |= __put_user(t, frame->tramp + 1);
3303
3304 /* Return from sighandler will jump to the tramp.
3305 Negative 8 offset because return is rtsd r15, 8 */
3306 env->regs[15] = ((unsigned long)frame->tramp) - 8;
3307 }
3308
3309 if (err)
3310 goto badframe;
3311
3312 /* Set up registers for signal handler */
3313 env->regs[1] = frame_addr;
3314 /* Signal handler args: */
3315 env->regs[5] = sig; /* Arg 0: signum */
3316 env->regs[6] = 0;
3317 /* arg 1: sigcontext */
3318 env->regs[7] = frame_addr += offsetof(typeof(*frame), uc);
3319
3320 /* Offset of 4 to handle microblaze rtid r14, 0 */
3321 env->sregs[SR_PC] = (unsigned long)ka->_sa_handler;
3322
3323 unlock_user_struct(frame, frame_addr, 1);
3324 return;
3325 badframe:
3326 unlock_user_struct(frame, frame_addr, 1);
3327 force_sig(TARGET_SIGSEGV);
3328 }
3329
3330 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3331 target_siginfo_t *info,
3332 target_sigset_t *set, CPUMBState *env)
3333 {
3334 fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n");
3335 }
3336
3337 long do_sigreturn(CPUMBState *env)
3338 {
3339 struct target_signal_frame *frame;
3340 abi_ulong frame_addr;
3341 target_sigset_t target_set;
3342 sigset_t set;
3343 int i;
3344
3345 frame_addr = env->regs[R_SP];
3346 /* Make sure the guest isn't playing games. */
3347 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3348 goto badframe;
3349
3350 /* Restore blocked signals */
3351 if (__get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask))
3352 goto badframe;
3353 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3354 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3355 goto badframe;
3356 }
3357 target_to_host_sigset_internal(&set, &target_set);
3358 sigprocmask(SIG_SETMASK, &set, NULL);
3359
3360 restore_sigcontext(&frame->uc.tuc_mcontext, env);
3361 /* We got here through a sigreturn syscall, our path back is via an
3362 rtb insn so setup r14 for that. */
3363 env->regs[14] = env->sregs[SR_PC];
3364
3365 unlock_user_struct(frame, frame_addr, 0);
3366 return env->regs[10];
3367 badframe:
3368 unlock_user_struct(frame, frame_addr, 0);
3369 force_sig(TARGET_SIGSEGV);
3370 }
3371
3372 long do_rt_sigreturn(CPUMBState *env)
3373 {
3374 fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n");
3375 return -TARGET_ENOSYS;
3376 }
3377
3378 #elif defined(TARGET_CRIS)
3379
3380 struct target_sigcontext {
3381 struct target_pt_regs regs; /* needs to be first */
3382 uint32_t oldmask;
3383 uint32_t usp; /* usp before stacking this gunk on it */
3384 };
3385
3386 /* Signal frames. */
3387 struct target_signal_frame {
3388 struct target_sigcontext sc;
3389 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3390 uint8_t retcode[8]; /* Trampoline code. */
3391 };
3392
3393 struct rt_signal_frame {
3394 siginfo_t *pinfo;
3395 void *puc;
3396 siginfo_t info;
3397 struct ucontext uc;
3398 uint8_t retcode[8]; /* Trampoline code. */
3399 };
3400
3401 static void setup_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
3402 {
3403 __put_user(env->regs[0], &sc->regs.r0);
3404 __put_user(env->regs[1], &sc->regs.r1);
3405 __put_user(env->regs[2], &sc->regs.r2);
3406 __put_user(env->regs[3], &sc->regs.r3);
3407 __put_user(env->regs[4], &sc->regs.r4);
3408 __put_user(env->regs[5], &sc->regs.r5);
3409 __put_user(env->regs[6], &sc->regs.r6);
3410 __put_user(env->regs[7], &sc->regs.r7);
3411 __put_user(env->regs[8], &sc->regs.r8);
3412 __put_user(env->regs[9], &sc->regs.r9);
3413 __put_user(env->regs[10], &sc->regs.r10);
3414 __put_user(env->regs[11], &sc->regs.r11);
3415 __put_user(env->regs[12], &sc->regs.r12);
3416 __put_user(env->regs[13], &sc->regs.r13);
3417 __put_user(env->regs[14], &sc->usp);
3418 __put_user(env->regs[15], &sc->regs.acr);
3419 __put_user(env->pregs[PR_MOF], &sc->regs.mof);
3420 __put_user(env->pregs[PR_SRP], &sc->regs.srp);
3421 __put_user(env->pc, &sc->regs.erp);
3422 }
3423
3424 static void restore_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
3425 {
3426 __get_user(env->regs[0], &sc->regs.r0);
3427 __get_user(env->regs[1], &sc->regs.r1);
3428 __get_user(env->regs[2], &sc->regs.r2);
3429 __get_user(env->regs[3], &sc->regs.r3);
3430 __get_user(env->regs[4], &sc->regs.r4);
3431 __get_user(env->regs[5], &sc->regs.r5);
3432 __get_user(env->regs[6], &sc->regs.r6);
3433 __get_user(env->regs[7], &sc->regs.r7);
3434 __get_user(env->regs[8], &sc->regs.r8);
3435 __get_user(env->regs[9], &sc->regs.r9);
3436 __get_user(env->regs[10], &sc->regs.r10);
3437 __get_user(env->regs[11], &sc->regs.r11);
3438 __get_user(env->regs[12], &sc->regs.r12);
3439 __get_user(env->regs[13], &sc->regs.r13);
3440 __get_user(env->regs[14], &sc->usp);
3441 __get_user(env->regs[15], &sc->regs.acr);
3442 __get_user(env->pregs[PR_MOF], &sc->regs.mof);
3443 __get_user(env->pregs[PR_SRP], &sc->regs.srp);
3444 __get_user(env->pc, &sc->regs.erp);
3445 }
3446
3447 static abi_ulong get_sigframe(CPUCRISState *env, int framesize)
3448 {
3449 abi_ulong sp;
3450 /* Align the stack downwards to 4. */
3451 sp = (env->regs[R_SP] & ~3);
3452 return sp - framesize;
3453 }
3454
3455 static void setup_frame(int sig, struct target_sigaction *ka,
3456 target_sigset_t *set, CPUCRISState *env)
3457 {
3458 struct target_signal_frame *frame;
3459 abi_ulong frame_addr;
3460 int err = 0;
3461 int i;
3462
3463 frame_addr = get_sigframe(env, sizeof *frame);
3464 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3465 goto badframe;
3466
3467 /*
3468 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
3469 * use this trampoline anymore but it sets it up for GDB.
3470 * In QEMU, using the trampoline simplifies things a bit so we use it.
3471 *
3472 * This is movu.w __NR_sigreturn, r9; break 13;
3473 */
3474 err |= __put_user(0x9c5f, frame->retcode+0);
3475 err |= __put_user(TARGET_NR_sigreturn,
3476 frame->retcode+2);
3477 err |= __put_user(0xe93d, frame->retcode+4);
3478
3479 /* Save the mask. */
3480 err |= __put_user(set->sig[0], &frame->sc.oldmask);
3481 if (err)
3482 goto badframe;
3483
3484 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3485 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
3486 goto badframe;
3487 }
3488
3489 setup_sigcontext(&frame->sc, env);
3490
3491 /* Move the stack and setup the arguments for the handler. */
3492 env->regs[R_SP] = frame_addr;
3493 env->regs[10] = sig;
3494 env->pc = (unsigned long) ka->_sa_handler;
3495 /* Link SRP so the guest returns through the trampoline. */
3496 env->pregs[PR_SRP] = frame_addr + offsetof(typeof(*frame), retcode);
3497
3498 unlock_user_struct(frame, frame_addr, 1);
3499 return;
3500 badframe:
3501 unlock_user_struct(frame, frame_addr, 1);
3502 force_sig(TARGET_SIGSEGV);
3503 }
3504
3505 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3506 target_siginfo_t *info,
3507 target_sigset_t *set, CPUCRISState *env)
3508 {
3509 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
3510 }
3511
3512 long do_sigreturn(CPUCRISState *env)
3513 {
3514 struct target_signal_frame *frame;
3515 abi_ulong frame_addr;
3516 target_sigset_t target_set;
3517 sigset_t set;
3518 int i;
3519
3520 frame_addr = env->regs[R_SP];
3521 /* Make sure the guest isn't playing games. */
3522 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3523 goto badframe;
3524
3525 /* Restore blocked signals */
3526 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
3527 goto badframe;
3528 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3529 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3530 goto badframe;
3531 }
3532 target_to_host_sigset_internal(&set, &target_set);
3533 sigprocmask(SIG_SETMASK, &set, NULL);
3534
3535 restore_sigcontext(&frame->sc, env);
3536 unlock_user_struct(frame, frame_addr, 0);
3537 return env->regs[10];
3538 badframe:
3539 unlock_user_struct(frame, frame_addr, 0);
3540 force_sig(TARGET_SIGSEGV);
3541 }
3542
3543 long do_rt_sigreturn(CPUCRISState *env)
3544 {
3545 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
3546 return -TARGET_ENOSYS;
3547 }
3548
3549 #elif defined(TARGET_OPENRISC)
3550
3551 struct target_sigcontext {
3552 struct target_pt_regs regs;
3553 abi_ulong oldmask;
3554 abi_ulong usp;
3555 };
3556
3557 struct target_ucontext {
3558 abi_ulong tuc_flags;
3559 abi_ulong tuc_link;
3560 target_stack_t tuc_stack;
3561 struct target_sigcontext tuc_mcontext;
3562 target_sigset_t tuc_sigmask; /* mask last for extensibility */
3563 };
3564
3565 struct target_rt_sigframe {
3566 abi_ulong pinfo;
3567 uint64_t puc;
3568 struct target_siginfo info;
3569 struct target_sigcontext sc;
3570 struct target_ucontext uc;
3571 unsigned char retcode[16]; /* trampoline code */
3572 };
3573
3574 /* This is the asm-generic/ucontext.h version */
3575 #if 0
3576 static int restore_sigcontext(CPUOpenRISCState *regs,
3577 struct target_sigcontext *sc)
3578 {
3579 unsigned int err = 0;
3580 unsigned long old_usp;
3581
3582 /* Alwys make any pending restarted system call return -EINTR */
3583 current_thread_info()->restart_block.fn = do_no_restart_syscall;
3584
3585 /* restore the regs from &sc->regs (same as sc, since regs is first)
3586 * (sc is already checked for VERIFY_READ since the sigframe was
3587 * checked in sys_sigreturn previously)
3588 */
3589
3590 if (copy_from_user(regs, &sc, sizeof(struct target_pt_regs))) {
3591 goto badframe;
3592 }
3593
3594 /* make sure the U-flag is set so user-mode cannot fool us */
3595
3596 regs->sr &= ~SR_SM;
3597
3598 /* restore the old USP as it was before we stacked the sc etc.
3599 * (we cannot just pop the sigcontext since we aligned the sp and
3600 * stuff after pushing it)
3601 */
3602
3603 err |= __get_user(old_usp, &sc->usp);
3604 phx_signal("old_usp 0x%lx", old_usp);
3605
3606 __PHX__ REALLY /* ??? */
3607 wrusp(old_usp);
3608 regs->gpr[1] = old_usp;
3609
3610 /* TODO: the other ports use regs->orig_XX to disable syscall checks
3611 * after this completes, but we don't use that mechanism. maybe we can
3612 * use it now ?
3613 */
3614
3615 return err;
3616
3617 badframe:
3618 return 1;
3619 }
3620 #endif
3621
3622 /* Set up a signal frame. */
3623
3624 static int setup_sigcontext(struct target_sigcontext *sc,
3625 CPUOpenRISCState *regs,
3626 unsigned long mask)
3627 {
3628 int err = 0;
3629 unsigned long usp = regs->gpr[1];
3630
3631 /* copy the regs. they are first in sc so we can use sc directly */
3632
3633 /*err |= copy_to_user(&sc, regs, sizeof(struct target_pt_regs));*/
3634
3635 /* Set the frametype to CRIS_FRAME_NORMAL for the execution of
3636 the signal handler. The frametype will be restored to its previous
3637 value in restore_sigcontext. */
3638 /*regs->frametype = CRIS_FRAME_NORMAL;*/
3639
3640 /* then some other stuff */
3641 err |= __put_user(mask, &sc->oldmask);
3642 err |= __put_user(usp, &sc->usp); return err;
3643 }
3644
3645 static inline unsigned long align_sigframe(unsigned long sp)
3646 {
3647 unsigned long i;
3648 i = sp & ~3UL;
3649 return i;
3650 }
3651
3652 static inline abi_ulong get_sigframe(struct target_sigaction *ka,
3653 CPUOpenRISCState *regs,
3654 size_t frame_size)
3655 {
3656 unsigned long sp = regs->gpr[1];
3657 int onsigstack = on_sig_stack(sp);
3658
3659 /* redzone */
3660 /* This is the X/Open sanctioned signal stack switching. */
3661 if ((ka->sa_flags & SA_ONSTACK) != 0 && !onsigstack) {
3662 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3663 }
3664
3665 sp = align_sigframe(sp - frame_size);
3666
3667 /*
3668 * If we are on the alternate signal stack and would overflow it, don't.
3669 * Return an always-bogus address instead so we will die with SIGSEGV.
3670 */
3671
3672 if (onsigstack && !likely(on_sig_stack(sp))) {
3673 return -1L;
3674 }
3675
3676 return sp;
3677 }
3678
3679 static void setup_frame(int sig, struct target_sigaction *ka,
3680 target_sigset_t *set, CPUOpenRISCState *env)
3681 {
3682 qemu_log("Not implement.\n");
3683 }
3684
3685 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3686 target_siginfo_t *info,
3687 target_sigset_t *set, CPUOpenRISCState *env)
3688 {
3689 int err = 0;
3690 abi_ulong frame_addr;
3691 unsigned long return_ip;
3692 struct target_rt_sigframe *frame;
3693 abi_ulong info_addr, uc_addr;
3694
3695 frame_addr = get_sigframe(ka, env, sizeof *frame);
3696
3697 frame_addr = get_sigframe(ka, env, sizeof(*frame));
3698 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3699 goto give_sigsegv;
3700 }
3701
3702 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
3703 err |= __put_user(info_addr, &frame->pinfo);
3704 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
3705 err |= __put_user(uc_addr, &frame->puc);
3706
3707 if (ka->sa_flags & SA_SIGINFO) {
3708 err |= copy_siginfo_to_user(&frame->info, info);
3709 }
3710 if (err) {
3711 goto give_sigsegv;
3712 }
3713
3714 /*err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));*/
3715 err |= __put_user(0, &frame->uc.tuc_flags);
3716 err |= __put_user(0, &frame->uc.tuc_link);
3717 err |= __put_user(target_sigaltstack_used.ss_sp,
3718 &frame->uc.tuc_stack.ss_sp);
3719 err |= __put_user(sas_ss_flags(env->gpr[1]), &frame->uc.tuc_stack.ss_flags);
3720 err |= __put_user(target_sigaltstack_used.ss_size,
3721 &frame->uc.tuc_stack.ss_size);
3722 err |= setup_sigcontext(&frame->sc, env, set->sig[0]);
3723
3724 /*err |= copy_to_user(frame->uc.tuc_sigmask, set, sizeof(*set));*/
3725
3726 if (err) {
3727 goto give_sigsegv;
3728 }
3729
3730 /* trampoline - the desired return ip is the retcode itself */
3731 return_ip = (unsigned long)&frame->retcode;
3732 /* This is l.ori r11,r0,__NR_sigreturn, l.sys 1 */
3733 err |= __put_user(0xa960, (short *)(frame->retcode + 0));
3734 err |= __put_user(TARGET_NR_rt_sigreturn, (short *)(frame->retcode + 2));
3735 err |= __put_user(0x20000001, (unsigned long *)(frame->retcode + 4));
3736 err |= __put_user(0x15000000, (unsigned long *)(frame->retcode + 8));
3737
3738 if (err) {
3739 goto give_sigsegv;
3740 }
3741
3742 /* TODO what is the current->exec_domain stuff and invmap ? */
3743
3744 /* Set up registers for signal handler */
3745 env->pc = (unsigned long)ka->_sa_handler; /* what we enter NOW */
3746 env->gpr[9] = (unsigned long)return_ip; /* what we enter LATER */
3747 env->gpr[3] = (unsigned long)sig; /* arg 1: signo */
3748 env->gpr[4] = (unsigned long)&frame->info; /* arg 2: (siginfo_t*) */
3749 env->gpr[5] = (unsigned long)&frame->uc; /* arg 3: ucontext */
3750
3751 /* actually move the usp to reflect the stacked frame */
3752 env->gpr[1] = (unsigned long)frame;
3753
3754 return;
3755
3756 give_sigsegv:
3757 unlock_user_struct(frame, frame_addr, 1);
3758 if (sig == TARGET_SIGSEGV) {
3759 ka->_sa_handler = TARGET_SIG_DFL;
3760 }
3761 force_sig(TARGET_SIGSEGV);
3762 }
3763
3764 long do_sigreturn(CPUOpenRISCState *env)
3765 {
3766
3767 qemu_log("do_sigreturn: not implemented\n");
3768 return -TARGET_ENOSYS;
3769 }
3770
3771 long do_rt_sigreturn(CPUOpenRISCState *env)
3772 {
3773 qemu_log("do_rt_sigreturn: not implemented\n");
3774 return -TARGET_ENOSYS;
3775 }
3776 /* TARGET_OPENRISC */
3777
3778 #elif defined(TARGET_S390X)
3779
3780 #define __NUM_GPRS 16
3781 #define __NUM_FPRS 16
3782 #define __NUM_ACRS 16
3783
3784 #define S390_SYSCALL_SIZE 2
3785 #define __SIGNAL_FRAMESIZE 160 /* FIXME: 31-bit mode -> 96 */
3786
3787 #define _SIGCONTEXT_NSIG 64
3788 #define _SIGCONTEXT_NSIG_BPW 64 /* FIXME: 31-bit mode -> 32 */
3789 #define _SIGCONTEXT_NSIG_WORDS (_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW)
3790 #define _SIGMASK_COPY_SIZE (sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS)
3791 #define PSW_ADDR_AMODE 0x0000000000000000UL /* 0x80000000UL for 31-bit */
3792 #define S390_SYSCALL_OPCODE ((uint16_t)0x0a00)
3793
3794 typedef struct {
3795 target_psw_t psw;
3796 target_ulong gprs[__NUM_GPRS];
3797 unsigned int acrs[__NUM_ACRS];
3798 } target_s390_regs_common;
3799
3800 typedef struct {
3801 unsigned int fpc;
3802 double fprs[__NUM_FPRS];
3803 } target_s390_fp_regs;
3804
3805 typedef struct {
3806 target_s390_regs_common regs;
3807 target_s390_fp_regs fpregs;
3808 } target_sigregs;
3809
3810 struct target_sigcontext {
3811 target_ulong oldmask[_SIGCONTEXT_NSIG_WORDS];
3812 target_sigregs *sregs;
3813 };
3814
3815 typedef struct {
3816 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
3817 struct target_sigcontext sc;
3818 target_sigregs sregs;
3819 int signo;
3820 uint8_t retcode[S390_SYSCALL_SIZE];
3821 } sigframe;
3822
3823 struct target_ucontext {
3824 target_ulong tuc_flags;
3825 struct target_ucontext *tuc_link;
3826 target_stack_t tuc_stack;
3827 target_sigregs tuc_mcontext;
3828 target_sigset_t tuc_sigmask; /* mask last for extensibility */
3829 };
3830
3831 typedef struct {
3832 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
3833 uint8_t retcode[S390_SYSCALL_SIZE];
3834 struct target_siginfo info;
3835 struct target_ucontext uc;
3836 } rt_sigframe;
3837
3838 static inline abi_ulong
3839 get_sigframe(struct target_sigaction *ka, CPUS390XState *env, size_t frame_size)
3840 {
3841 abi_ulong sp;
3842
3843 /* Default to using normal stack */
3844 sp = env->regs[15];
3845
3846 /* This is the X/Open sanctioned signal stack switching. */
3847 if (ka->sa_flags & TARGET_SA_ONSTACK) {
3848 if (!sas_ss_flags(sp)) {
3849 sp = target_sigaltstack_used.ss_sp +
3850 target_sigaltstack_used.ss_size;
3851 }
3852 }
3853
3854 /* This is the legacy signal stack switching. */
3855 else if (/* FIXME !user_mode(regs) */ 0 &&
3856 !(ka->sa_flags & TARGET_SA_RESTORER) &&
3857 ka->sa_restorer) {
3858 sp = (abi_ulong) ka->sa_restorer;
3859 }
3860
3861 return (sp - frame_size) & -8ul;
3862 }
3863
3864 static void save_sigregs(CPUS390XState *env, target_sigregs *sregs)
3865 {
3866 int i;
3867 //save_access_regs(current->thread.acrs); FIXME
3868
3869 /* Copy a 'clean' PSW mask to the user to avoid leaking
3870 information about whether PER is currently on. */
3871 __put_user(env->psw.mask, &sregs->regs.psw.mask);
3872 __put_user(env->psw.addr, &sregs->regs.psw.addr);
3873 for (i = 0; i < 16; i++) {
3874 __put_user(env->regs[i], &sregs->regs.gprs[i]);
3875 }
3876 for (i = 0; i < 16; i++) {
3877 __put_user(env->aregs[i], &sregs->regs.acrs[i]);
3878 }
3879 /*
3880 * We have to store the fp registers to current->thread.fp_regs
3881 * to merge them with the emulated registers.
3882 */
3883 //save_fp_regs(&current->thread.fp_regs); FIXME
3884 for (i = 0; i < 16; i++) {
3885 __put_user(env->fregs[i].ll, &sregs->fpregs.fprs[i]);
3886 }
3887 }
3888
3889 static void setup_frame(int sig, struct target_sigaction *ka,
3890 target_sigset_t *set, CPUS390XState *env)
3891 {
3892 sigframe *frame;
3893 abi_ulong frame_addr;
3894
3895 frame_addr = get_sigframe(ka, env, sizeof(*frame));
3896 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
3897 (unsigned long long)frame_addr);
3898 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3899 goto give_sigsegv;
3900 }
3901
3902 qemu_log("%s: 1\n", __FUNCTION__);
3903 if (__put_user(set->sig[0], &frame->sc.oldmask[0])) {
3904 goto give_sigsegv;
3905 }
3906
3907 save_sigregs(env, &frame->sregs);
3908
3909 __put_user((abi_ulong)(unsigned long)&frame->sregs,
3910 (abi_ulong *)&frame->sc.sregs);
3911
3912 /* Set up to return from userspace. If provided, use a stub
3913 already in userspace. */
3914 if (ka->sa_flags & TARGET_SA_RESTORER) {
3915 env->regs[14] = (unsigned long)
3916 ka->sa_restorer | PSW_ADDR_AMODE;
3917 } else {
3918 env->regs[14] = (unsigned long)
3919 frame->retcode | PSW_ADDR_AMODE;
3920 if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn,
3921 (uint16_t *)(frame->retcode)))
3922 goto give_sigsegv;
3923 }
3924
3925 /* Set up backchain. */
3926 if (__put_user(env->regs[15], (abi_ulong *) frame)) {
3927 goto give_sigsegv;
3928 }
3929
3930 /* Set up registers for signal handler */
3931 env->regs[15] = frame_addr;
3932 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
3933
3934 env->regs[2] = sig; //map_signal(sig);
3935 env->regs[3] = frame_addr += offsetof(typeof(*frame), sc);
3936
3937 /* We forgot to include these in the sigcontext.
3938 To avoid breaking binary compatibility, they are passed as args. */
3939 env->regs[4] = 0; // FIXME: no clue... current->thread.trap_no;
3940 env->regs[5] = 0; // FIXME: no clue... current->thread.prot_addr;
3941
3942 /* Place signal number on stack to allow backtrace from handler. */
3943 if (__put_user(env->regs[2], (int *) &frame->signo)) {
3944 goto give_sigsegv;
3945 }
3946 unlock_user_struct(frame, frame_addr, 1);
3947 return;
3948
3949 give_sigsegv:
3950 qemu_log("%s: give_sigsegv\n", __FUNCTION__);
3951 unlock_user_struct(frame, frame_addr, 1);
3952 force_sig(TARGET_SIGSEGV);
3953 }
3954
3955 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3956 target_siginfo_t *info,
3957 target_sigset_t *set, CPUS390XState *env)
3958 {
3959 int i;
3960 rt_sigframe *frame;
3961 abi_ulong frame_addr;
3962
3963 frame_addr = get_sigframe(ka, env, sizeof *frame);
3964 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
3965 (unsigned long long)frame_addr);
3966 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3967 goto give_sigsegv;
3968 }
3969
3970 qemu_log("%s: 1\n", __FUNCTION__);
3971 if (copy_siginfo_to_user(&frame->info, info)) {
3972 goto give_sigsegv;
3973 }
3974
3975 /* Create the ucontext. */
3976 __put_user(0, &frame->uc.tuc_flags);
3977 __put_user((abi_ulong)0, (abi_ulong *)&frame->uc.tuc_link);
3978 __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
3979 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
3980 &frame->uc.tuc_stack.ss_flags);
3981 __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size);
3982 save_sigregs(env, &frame->uc.tuc_mcontext);
3983 for (i = 0; i < TARGET_NSIG_WORDS; i++) {
3984 __put_user((abi_ulong)set->sig[i],
3985 (abi_ulong *)&frame->uc.tuc_sigmask.sig[i]);
3986 }
3987
3988 /* Set up to return from userspace. If provided, use a stub
3989 already in userspace. */
3990 if (ka->sa_flags & TARGET_SA_RESTORER) {
3991 env->regs[14] = (unsigned long) ka->sa_restorer | PSW_ADDR_AMODE;
3992 } else {
3993 env->regs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE;
3994 if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn,
3995 (uint16_t *)(frame->retcode))) {
3996 goto give_sigsegv;
3997 }
3998 }
3999
4000 /* Set up backchain. */
4001 if (__put_user(env->regs[15], (abi_ulong *) frame)) {
4002 goto give_sigsegv;
4003 }
4004
4005 /* Set up registers for signal handler */
4006 env->regs[15] = frame_addr;
4007 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
4008
4009 env->regs[2] = sig; //map_signal(sig);
4010 env->regs[3] = frame_addr + offsetof(typeof(*frame), info);
4011 env->regs[4] = frame_addr + offsetof(typeof(*frame), uc);
4012 return;
4013
4014 give_sigsegv:
4015 qemu_log("%s: give_sigsegv\n", __FUNCTION__);
4016 unlock_user_struct(frame, frame_addr, 1);
4017 force_sig(TARGET_SIGSEGV);
4018 }
4019
4020 static int
4021 restore_sigregs(CPUS390XState *env, target_sigregs *sc)
4022 {
4023 int err = 0;
4024 int i;
4025
4026 for (i = 0; i < 16; i++) {
4027 err |= __get_user(env->regs[i], &sc->regs.gprs[i]);
4028 }
4029
4030 err |= __get_user(env->psw.mask, &sc->regs.psw.mask);
4031 qemu_log("%s: sc->regs.psw.addr 0x%llx env->psw.addr 0x%llx\n",
4032 __FUNCTION__, (unsigned long long)sc->regs.psw.addr,
4033 (unsigned long long)env->psw.addr);
4034 err |= __get_user(env->psw.addr, &sc->regs.psw.addr);
4035 /* FIXME: 31-bit -> | PSW_ADDR_AMODE */
4036
4037 for (i = 0; i < 16; i++) {
4038 err |= __get_user(env->aregs[i], &sc->regs.acrs[i]);
4039 }
4040 for (i = 0; i < 16; i++) {
4041 err |= __get_user(env->fregs[i].ll, &sc->fpregs.fprs[i]);
4042 }
4043
4044 return err;
4045 }
4046
4047 long do_sigreturn(CPUS390XState *env)
4048 {
4049 sigframe *frame;
4050 abi_ulong frame_addr = env->regs[15];
4051 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
4052 (unsigned long long)frame_addr);
4053 target_sigset_t target_set;
4054 sigset_t set;
4055
4056 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
4057 goto badframe;
4058 }
4059 if (__get_user(target_set.sig[0], &frame->sc.oldmask[0])) {
4060 goto badframe;
4061 }
4062
4063 target_to_host_sigset_internal(&set, &target_set);
4064 sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */
4065
4066 if (restore_sigregs(env, &frame->sregs)) {
4067 goto badframe;
4068 }
4069
4070 unlock_user_struct(frame, frame_addr, 0);
4071 return env->regs[2];
4072
4073 badframe:
4074 unlock_user_struct(frame, frame_addr, 0);
4075 force_sig(TARGET_SIGSEGV);
4076 return 0;
4077 }
4078
4079 long do_rt_sigreturn(CPUS390XState *env)
4080 {
4081 rt_sigframe *frame;
4082 abi_ulong frame_addr = env->regs[15];
4083 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
4084 (unsigned long long)frame_addr);
4085 sigset_t set;
4086
4087 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
4088 goto badframe;
4089 }
4090 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
4091
4092 sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */
4093
4094 if (restore_sigregs(env, &frame->uc.tuc_mcontext)) {
4095 goto badframe;
4096 }
4097
4098 if (do_sigaltstack(frame_addr + offsetof(rt_sigframe, uc.tuc_stack), 0,
4099 get_sp_from_cpustate(env)) == -EFAULT) {
4100 goto badframe;
4101 }
4102 unlock_user_struct(frame, frame_addr, 0);
4103 return env->regs[2];
4104
4105 badframe:
4106 unlock_user_struct(frame, frame_addr, 0);
4107 force_sig(TARGET_SIGSEGV);
4108 return 0;
4109 }
4110
4111 #elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
4112
4113 /* FIXME: Many of the structures are defined for both PPC and PPC64, but
4114 the signal handling is different enough that we haven't implemented
4115 support for PPC64 yet. Hence the restriction above.
4116
4117 There are various #if'd blocks for code for TARGET_PPC64. These
4118 blocks should go away so that we can successfully run 32-bit and
4119 64-bit binaries on a QEMU configured for PPC64. */
4120
4121 /* Size of dummy stack frame allocated when calling signal handler.
4122 See arch/powerpc/include/asm/ptrace.h. */
4123 #if defined(TARGET_PPC64)
4124 #define SIGNAL_FRAMESIZE 128
4125 #else
4126 #define SIGNAL_FRAMESIZE 64
4127 #endif
4128
4129 /* See arch/powerpc/include/asm/sigcontext.h. */
4130 struct target_sigcontext {
4131 target_ulong _unused[4];
4132 int32_t signal;
4133 #if defined(TARGET_PPC64)
4134 int32_t pad0;
4135 #endif
4136 target_ulong handler;
4137 target_ulong oldmask;
4138 target_ulong regs; /* struct pt_regs __user * */
4139 /* TODO: PPC64 includes extra bits here. */
4140 };
4141
4142 /* Indices for target_mcontext.mc_gregs, below.
4143 See arch/powerpc/include/asm/ptrace.h for details. */
4144 enum {
4145 TARGET_PT_R0 = 0,
4146 TARGET_PT_R1 = 1,
4147 TARGET_PT_R2 = 2,
4148 TARGET_PT_R3 = 3,
4149 TARGET_PT_R4 = 4,
4150 TARGET_PT_R5 = 5,
4151 TARGET_PT_R6 = 6,
4152 TARGET_PT_R7 = 7,
4153 TARGET_PT_R8 = 8,
4154 TARGET_PT_R9 = 9,
4155 TARGET_PT_R10 = 10,
4156 TARGET_PT_R11 = 11,
4157 TARGET_PT_R12 = 12,
4158 TARGET_PT_R13 = 13,
4159 TARGET_PT_R14 = 14,
4160 TARGET_PT_R15 = 15,
4161 TARGET_PT_R16 = 16,
4162 TARGET_PT_R17 = 17,
4163 TARGET_PT_R18 = 18,
4164 TARGET_PT_R19 = 19,
4165 TARGET_PT_R20 = 20,
4166 TARGET_PT_R21 = 21,
4167 TARGET_PT_R22 = 22,
4168 TARGET_PT_R23 = 23,
4169 TARGET_PT_R24 = 24,
4170 TARGET_PT_R25 = 25,
4171 TARGET_PT_R26 = 26,
4172 TARGET_PT_R27 = 27,
4173 TARGET_PT_R28 = 28,
4174 TARGET_PT_R29 = 29,
4175 TARGET_PT_R30 = 30,
4176 TARGET_PT_R31 = 31,
4177 TARGET_PT_NIP = 32,
4178 TARGET_PT_MSR = 33,
4179 TARGET_PT_ORIG_R3 = 34,
4180 TARGET_PT_CTR = 35,
4181 TARGET_PT_LNK = 36,
4182 TARGET_PT_XER = 37,
4183 TARGET_PT_CCR = 38,
4184 /* Yes, there are two registers with #39. One is 64-bit only. */
4185 TARGET_PT_MQ = 39,
4186 TARGET_PT_SOFTE = 39,
4187 TARGET_PT_TRAP = 40,
4188 TARGET_PT_DAR = 41,
4189 TARGET_PT_DSISR = 42,
4190 TARGET_PT_RESULT = 43,
4191 TARGET_PT_REGS_COUNT = 44
4192 };
4193
4194 /* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC;
4195 on 64-bit PPC, sigcontext and mcontext are one and the same. */
4196 struct target_mcontext {
4197 target_ulong mc_gregs[48];
4198 /* Includes fpscr. */
4199 uint64_t mc_fregs[33];
4200 target_ulong mc_pad[2];
4201 /* We need to handle Altivec and SPE at the same time, which no
4202 kernel needs to do. Fortunately, the kernel defines this bit to
4203 be Altivec-register-large all the time, rather than trying to
4204 twiddle it based on the specific platform. */
4205 union {
4206 /* SPE vector registers. One extra for SPEFSCR. */
4207 uint32_t spe[33];
4208 /* Altivec vector registers. The packing of VSCR and VRSAVE
4209 varies depending on whether we're PPC64 or not: PPC64 splits
4210 them apart; PPC32 stuffs them together. */
4211 #if defined(TARGET_PPC64)
4212 #define QEMU_NVRREG 34
4213 #else
4214 #define QEMU_NVRREG 33
4215 #endif
4216 ppc_avr_t altivec[QEMU_NVRREG];
4217 #undef QEMU_NVRREG
4218 } mc_vregs __attribute__((__aligned__(16)));
4219 };
4220
4221 struct target_ucontext {
4222 target_ulong tuc_flags;
4223 target_ulong tuc_link; /* struct ucontext __user * */
4224 struct target_sigaltstack tuc_stack;
4225 #if !defined(TARGET_PPC64)
4226 int32_t tuc_pad[7];
4227 target_ulong tuc_regs; /* struct mcontext __user *
4228 points to uc_mcontext field */
4229 #endif
4230 target_sigset_t tuc_sigmask;
4231 #if defined(TARGET_PPC64)
4232 target_sigset_t unused[15]; /* Allow for uc_sigmask growth */
4233 struct target_sigcontext tuc_mcontext;
4234 #else
4235 int32_t tuc_maskext[30];
4236 int32_t tuc_pad2[3];
4237 struct target_mcontext tuc_mcontext;
4238 #endif
4239 };
4240
4241 /* See arch/powerpc/kernel/signal_32.c. */
4242 struct target_sigframe {
4243 struct target_sigcontext sctx;
4244 struct target_mcontext mctx;
4245 int32_t abigap[56];
4246 };
4247
4248 struct target_rt_sigframe {
4249 struct target_siginfo info;
4250 struct target_ucontext uc;
4251 int32_t abigap[56];
4252 };
4253
4254 /* We use the mc_pad field for the signal return trampoline. */
4255 #define tramp mc_pad
4256
4257 /* See arch/powerpc/kernel/signal.c. */
4258 static target_ulong get_sigframe(struct target_sigaction *ka,
4259 CPUPPCState *env,
4260 int frame_size)
4261 {
4262 target_ulong oldsp, newsp;
4263
4264 oldsp = env->gpr[1];
4265
4266 if ((ka->sa_flags & TARGET_SA_ONSTACK) &&
4267 (sas_ss_flags(oldsp) == 0)) {
4268 oldsp = (target_sigaltstack_used.ss_sp
4269 + target_sigaltstack_used.ss_size);
4270 }
4271
4272 newsp = (oldsp - frame_size) & ~0xFUL;
4273
4274 return newsp;
4275 }
4276
4277 static int save_user_regs(CPUPPCState *env, struct target_mcontext *frame,
4278 int sigret)
4279 {
4280 target_ulong msr = env->msr;
4281 int i;
4282 target_ulong ccr = 0;
4283
4284 /* In general, the kernel attempts to be intelligent about what it
4285 needs to save for Altivec/FP/SPE registers. We don't care that
4286 much, so we just go ahead and save everything. */
4287
4288 /* Save general registers. */
4289 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4290 if (__put_user(env->gpr[i], &frame->mc_gregs[i])) {
4291 return 1;
4292 }
4293 }
4294 if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
4295 || __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
4296 || __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
4297 || __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
4298 return 1;
4299
4300 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
4301 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
4302 }
4303 if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
4304 return 1;
4305
4306 /* Save Altivec registers if necessary. */
4307 if (env->insns_flags & PPC_ALTIVEC) {
4308 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
4309 ppc_avr_t *avr = &env->avr[i];
4310 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
4311
4312 if (__put_user(avr->u64[0], &vreg->u64[0]) ||
4313 __put_user(avr->u64[1], &vreg->u64[1])) {
4314 return 1;
4315 }
4316 }
4317 /* Set MSR_VR in the saved MSR value to indicate that
4318 frame->mc_vregs contains valid data. */
4319 msr |= MSR_VR;
4320 if (__put_user((uint32_t)env->spr[SPR_VRSAVE],
4321 &frame->mc_vregs.altivec[32].u32[3]))
4322 return 1;
4323 }
4324
4325 /* Save floating point registers. */
4326 if (env->insns_flags & PPC_FLOAT) {
4327 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
4328 if (__put_user(env->fpr[i], &frame->mc_fregs[i])) {
4329 return 1;
4330 }
4331 }
4332 if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32]))
4333 return 1;
4334 }
4335
4336 /* Save SPE registers. The kernel only saves the high half. */
4337 if (env->insns_flags & PPC_SPE) {
4338 #if defined(TARGET_PPC64)
4339 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4340 if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) {
4341 return 1;
4342 }
4343 }
4344 #else
4345 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
4346 if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
4347 return 1;
4348 }
4349 }
4350 #endif
4351 /* Set MSR_SPE in the saved MSR value to indicate that
4352 frame->mc_vregs contains valid data. */
4353 msr |= MSR_SPE;
4354 if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
4355 return 1;
4356 }
4357
4358 /* Store MSR. */
4359 if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
4360 return 1;
4361
4362 /* Set up the sigreturn trampoline: li r0,sigret; sc. */
4363 if (sigret) {
4364 if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) ||
4365 __put_user(0x44000002UL, &frame->tramp[1])) {
4366 return 1;
4367 }
4368 }
4369
4370 return 0;
4371 }
4372
4373 static int restore_user_regs(CPUPPCState *env,
4374 struct target_mcontext *frame, int sig)
4375 {
4376 target_ulong save_r2 = 0;
4377 target_ulong msr;
4378 target_ulong ccr;
4379
4380 int i;
4381
4382 if (!sig) {
4383 save_r2 = env->gpr[2];
4384 }
4385
4386 /* Restore general registers. */
4387 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4388 if (__get_user(env->gpr[i], &frame->mc_gregs[i])) {
4389 return 1;
4390 }
4391 }
4392 if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
4393 || __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
4394 || __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
4395 || __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
4396 return 1;
4397 if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
4398 return 1;
4399
4400 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
4401 env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf;
4402 }
4403
4404 if (!sig) {
4405 env->gpr[2] = save_r2;
4406 }
4407 /* Restore MSR. */
4408 if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
4409 return 1;
4410
4411 /* If doing signal return, restore the previous little-endian mode. */
4412 if (sig)
4413 env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE);
4414
4415 /* Restore Altivec registers if necessary. */
4416 if (env->insns_flags & PPC_ALTIVEC) {
4417 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
4418 ppc_avr_t *avr = &env->avr[i];
4419 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
4420
4421 if (__get_user(avr->u64[0], &vreg->u64[0]) ||
4422 __get_user(avr->u64[1], &vreg->u64[1])) {
4423 return 1;
4424 }
4425 }
4426 /* Set MSR_VEC in the saved MSR value to indicate that
4427 frame->mc_vregs contains valid data. */
4428 if (__get_user(env->spr[SPR_VRSAVE],
4429 (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3])))
4430 return 1;
4431 }
4432
4433 /* Restore floating point registers. */
4434 if (env->insns_flags & PPC_FLOAT) {
4435 uint64_t fpscr;
4436 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
4437 if (__get_user(env->fpr[i], &frame->mc_fregs[i])) {
4438 return 1;
4439 }
4440 }
4441 if (__get_user(fpscr, &frame->mc_fregs[32]))
4442 return 1;
4443 env->fpscr = (uint32_t) fpscr;
4444 }
4445
4446 /* Save SPE registers. The kernel only saves the high half. */
4447 if (env->insns_flags & PPC_SPE) {
4448 #if defined(TARGET_PPC64)
4449 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4450 uint32_t hi;
4451
4452 if (__get_user(hi, &frame->mc_vregs.spe[i])) {
4453 return 1;
4454 }
4455 env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
4456 }
4457 #else
4458 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
4459 if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
4460 return 1;
4461 }
4462 }
4463 #endif
4464 if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
4465 return 1;
4466 }
4467
4468 return 0;
4469 }
4470
4471 static void setup_frame(int sig, struct target_sigaction *ka,
4472 target_sigset_t *set, CPUPPCState *env)
4473 {
4474 struct target_sigframe *frame;
4475 struct target_sigcontext *sc;
4476 target_ulong frame_addr, newsp;
4477 int err = 0;
4478 int signal;
4479
4480 frame_addr = get_sigframe(ka, env, sizeof(*frame));
4481 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
4482 goto sigsegv;
4483 sc = &frame->sctx;
4484
4485 signal = current_exec_domain_sig(sig);
4486
4487 err |= __put_user(ka->_sa_handler, &sc->handler);
4488 err |= __put_user(set->sig[0], &sc->oldmask);
4489 #if defined(TARGET_PPC64)
4490 err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]);
4491 #else
4492 err |= __put_user(set->sig[1], &sc->_unused[3]);
4493 #endif
4494 err |= __put_user(h2g(&frame->mctx), &sc->regs);
4495 err |= __put_user(sig, &sc->signal);
4496
4497 /* Save user regs. */
4498 err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn);
4499
4500 /* The kernel checks for the presence of a VDSO here. We don't
4501 emulate a vdso, so use a sigreturn system call. */
4502 env->lr = (target_ulong) h2g(frame->mctx.tramp);
4503
4504 /* Turn off all fp exceptions. */
4505 env->fpscr = 0;
4506
4507 /* Create a stack frame for the caller of the handler. */
4508 newsp = frame_addr - SIGNAL_FRAMESIZE;
4509 err |= put_user(env->gpr[1], newsp, target_ulong);
4510
4511 if (err)
4512 goto sigsegv;
4513
4514 /* Set up registers for signal handler. */
4515 env->gpr[1] = newsp;
4516 env->gpr[3] = signal;
4517 env->gpr[4] = frame_addr + offsetof(struct target_sigframe, sctx);
4518 env->nip = (target_ulong) ka->_sa_handler;
4519 /* Signal handlers are entered in big-endian mode. */
4520 env->msr &= ~MSR_LE;
4521
4522 unlock_user_struct(frame, frame_addr, 1);
4523 return;
4524
4525 sigsegv:
4526 unlock_user_struct(frame, frame_addr, 1);
4527 qemu_log("segfaulting from setup_frame\n");
4528 force_sig(TARGET_SIGSEGV);
4529 }
4530
4531 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4532 target_siginfo_t *info,
4533 target_sigset_t *set, CPUPPCState *env)
4534 {
4535 struct target_rt_sigframe *rt_sf;
4536 struct target_mcontext *frame;
4537 target_ulong rt_sf_addr, newsp = 0;
4538 int i, err = 0;
4539 int signal;
4540
4541 rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
4542 if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1))
4543 goto sigsegv;
4544
4545 signal = current_exec_domain_sig(sig);
4546
4547 err |= copy_siginfo_to_user(&rt_sf->info, info);
4548
4549 err |= __put_user(0, &rt_sf->uc.tuc_flags);
4550 err |= __put_user(0, &rt_sf->uc.tuc_link);
4551 err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp,
4552 &rt_sf->uc.tuc_stack.ss_sp);
4553 err |= __put_user(sas_ss_flags(env->gpr[1]),
4554 &rt_sf->uc.tuc_stack.ss_flags);
4555 err |= __put_user(target_sigaltstack_used.ss_size,
4556 &rt_sf->uc.tuc_stack.ss_size);
4557 err |= __put_user(h2g (&rt_sf->uc.tuc_mcontext),
4558 &rt_sf->uc.tuc_regs);
4559 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
4560 err |= __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]);
4561 }
4562
4563 frame = &rt_sf->uc.tuc_mcontext;
4564 err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn);
4565
4566 /* The kernel checks for the presence of a VDSO here. We don't
4567 emulate a vdso, so use a sigreturn system call. */
4568 env->lr = (target_ulong) h2g(frame->tramp);
4569
4570 /* Turn off all fp exceptions. */
4571 env->fpscr = 0;
4572
4573 /* Create a stack frame for the caller of the handler. */
4574 newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
4575 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
4576
4577 if (err)
4578 goto sigsegv;
4579
4580 /* Set up registers for signal handler. */
4581 env->gpr[1] = newsp;
4582 env->gpr[3] = (target_ulong) signal;
4583 env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
4584 env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
4585 env->gpr[6] = (target_ulong) h2g(rt_sf);
4586 env->nip = (target_ulong) ka->_sa_handler;
4587 /* Signal handlers are entered in big-endian mode. */
4588 env->msr &= ~MSR_LE;
4589
4590 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4591 return;
4592
4593 sigsegv:
4594 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4595 qemu_log("segfaulting from setup_rt_frame\n");
4596 force_sig(TARGET_SIGSEGV);
4597
4598 }
4599
4600 long do_sigreturn(CPUPPCState *env)
4601 {
4602 struct target_sigcontext *sc = NULL;
4603 struct target_mcontext *sr = NULL;
4604 target_ulong sr_addr, sc_addr;
4605 sigset_t blocked;
4606 target_sigset_t set;
4607
4608 sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
4609 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1))
4610 goto sigsegv;
4611
4612 #if defined(TARGET_PPC64)
4613 set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32);
4614 #else
4615 if(__get_user(set.sig[0], &sc->oldmask) ||
4616 __get_user(set.sig[1], &sc->_unused[3]))
4617 goto sigsegv;
4618 #endif
4619 target_to_host_sigset_internal(&blocked, &set);
4620 sigprocmask(SIG_SETMASK, &blocked, NULL);
4621
4622 if (__get_user(sr_addr, &sc->regs))
4623 goto sigsegv;
4624 if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1))
4625 goto sigsegv;
4626 if (restore_user_regs(env, sr, 1))
4627 goto sigsegv;
4628
4629 unlock_user_struct(sr, sr_addr, 1);
4630 unlock_user_struct(sc, sc_addr, 1);
4631 return -TARGET_QEMU_ESIGRETURN;
4632
4633 sigsegv:
4634 unlock_user_struct(sr, sr_addr, 1);
4635 unlock_user_struct(sc, sc_addr, 1);
4636 qemu_log("segfaulting from do_sigreturn\n");
4637 force_sig(TARGET_SIGSEGV);
4638 return 0;
4639 }
4640
4641 /* See arch/powerpc/kernel/signal_32.c. */
4642 static int do_setcontext(struct target_ucontext *ucp, CPUPPCState *env, int sig)
4643 {
4644 struct target_mcontext *mcp;
4645 target_ulong mcp_addr;
4646 sigset_t blocked;
4647 target_sigset_t set;
4648
4649 if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask),
4650 sizeof (set)))
4651 return 1;
4652
4653 #if defined(TARGET_PPC64)
4654 fprintf (stderr, "do_setcontext: not implemented\n");
4655 return 0;
4656 #else
4657 if (__get_user(mcp_addr, &ucp->tuc_regs))
4658 return 1;
4659
4660 if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1))
4661 return 1;
4662
4663 target_to_host_sigset_internal(&blocked, &set);
4664 sigprocmask(SIG_SETMASK, &blocked, NULL);
4665 if (restore_user_regs(env, mcp, sig))
4666 goto sigsegv;
4667
4668 unlock_user_struct(mcp, mcp_addr, 1);
4669 return 0;
4670
4671 sigsegv:
4672 unlock_user_struct(mcp, mcp_addr, 1);
4673 return 1;
4674 #endif
4675 }
4676
4677 long do_rt_sigreturn(CPUPPCState *env)
4678 {
4679 struct target_rt_sigframe *rt_sf = NULL;
4680 target_ulong rt_sf_addr;
4681
4682 rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16;
4683 if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1))
4684 goto sigsegv;
4685
4686 if (do_setcontext(&rt_sf->uc, env, 1))
4687 goto sigsegv;
4688
4689 do_sigaltstack(rt_sf_addr
4690 + offsetof(struct target_rt_sigframe, uc.tuc_stack),
4691 0, env->gpr[1]);
4692
4693 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4694 return -TARGET_QEMU_ESIGRETURN;
4695
4696 sigsegv:
4697 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4698 qemu_log("segfaulting from do_rt_sigreturn\n");
4699 force_sig(TARGET_SIGSEGV);
4700 return 0;
4701 }
4702
4703 #elif defined(TARGET_M68K)
4704
4705 struct target_sigcontext {
4706 abi_ulong sc_mask;
4707 abi_ulong sc_usp;
4708 abi_ulong sc_d0;
4709 abi_ulong sc_d1;
4710 abi_ulong sc_a0;
4711 abi_ulong sc_a1;
4712 unsigned short sc_sr;
4713 abi_ulong sc_pc;
4714 };
4715
4716 struct target_sigframe
4717 {
4718 abi_ulong pretcode;
4719 int sig;
4720 int code;
4721 abi_ulong psc;
4722 char retcode[8];
4723 abi_ulong extramask[TARGET_NSIG_WORDS-1];
4724 struct target_sigcontext sc;
4725 };
4726
4727 typedef int target_greg_t;
4728 #define TARGET_NGREG 18
4729 typedef target_greg_t target_gregset_t[TARGET_NGREG];
4730
4731 typedef struct target_fpregset {
4732 int f_fpcntl[3];
4733 int f_fpregs[8*3];
4734 } target_fpregset_t;
4735
4736 struct target_mcontext {
4737 int version;
4738 target_gregset_t gregs;
4739 target_fpregset_t fpregs;
4740 };
4741
4742 #define TARGET_MCONTEXT_VERSION 2
4743
4744 struct target_ucontext {
4745 abi_ulong tuc_flags;
4746 abi_ulong tuc_link;
4747 target_stack_t tuc_stack;
4748 struct target_mcontext tuc_mcontext;
4749 abi_long tuc_filler[80];
4750 target_sigset_t tuc_sigmask;
4751 };
4752
4753 struct target_rt_sigframe
4754 {
4755 abi_ulong pretcode;
4756 int sig;
4757 abi_ulong pinfo;
4758 abi_ulong puc;
4759 char retcode[8];
4760 struct target_siginfo info;
4761 struct target_ucontext uc;
4762 };
4763
4764 static int
4765 setup_sigcontext(struct target_sigcontext *sc, CPUM68KState *env,
4766 abi_ulong mask)
4767 {
4768 int err = 0;
4769
4770 err |= __put_user(mask, &sc->sc_mask);
4771 err |= __put_user(env->aregs[7], &sc->sc_usp);
4772 err |= __put_user(env->dregs[0], &sc->sc_d0);
4773 err |= __put_user(env->dregs[1], &sc->sc_d1);
4774 err |= __put_user(env->aregs[0], &sc->sc_a0);
4775 err |= __put_user(env->aregs[1], &sc->sc_a1);
4776 err |= __put_user(env->sr, &sc->sc_sr);
4777 err |= __put_user(env->pc, &sc->sc_pc);
4778
4779 return err;
4780 }
4781
4782 static int
4783 restore_sigcontext(CPUM68KState *env, struct target_sigcontext *sc, int *pd0)
4784 {
4785 int err = 0;
4786 int temp;
4787
4788 err |= __get_user(env->aregs[7], &sc->sc_usp);
4789 err |= __get_user(env->dregs[1], &sc->sc_d1);
4790 err |= __get_user(env->aregs[0], &sc->sc_a0);
4791 err |= __get_user(env->aregs[1], &sc->sc_a1);
4792 err |= __get_user(env->pc, &sc->sc_pc);
4793 err |= __get_user(temp, &sc->sc_sr);
4794 env->sr = (env->sr & 0xff00) | (temp & 0xff);
4795
4796 *pd0 = tswapl(sc->sc_d0);
4797
4798 return err;
4799 }
4800
4801 /*
4802 * Determine which stack to use..
4803 */
4804 static inline abi_ulong
4805 get_sigframe(struct target_sigaction *ka, CPUM68KState *regs,
4806 size_t frame_size)
4807 {
4808 unsigned long sp;
4809
4810 sp = regs->aregs[7];
4811
4812 /* This is the X/Open sanctioned signal stack switching. */
4813 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
4814 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
4815 }
4816
4817 return ((sp - frame_size) & -8UL);
4818 }
4819
4820 static void setup_frame(int sig, struct target_sigaction *ka,
4821 target_sigset_t *set, CPUM68KState *env)
4822 {
4823 struct target_sigframe *frame;
4824 abi_ulong frame_addr;
4825 abi_ulong retcode_addr;
4826 abi_ulong sc_addr;
4827 int err = 0;
4828 int i;
4829
4830 frame_addr = get_sigframe(ka, env, sizeof *frame);
4831 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
4832 goto give_sigsegv;
4833
4834 err |= __put_user(sig, &frame->sig);
4835
4836 sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
4837 err |= __put_user(sc_addr, &frame->psc);
4838
4839 err |= setup_sigcontext(&frame->sc, env, set->sig[0]);
4840 if (err)
4841 goto give_sigsegv;
4842
4843 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
4844 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
4845 goto give_sigsegv;
4846 }
4847
4848 /* Set up to return from userspace. */
4849
4850 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
4851 err |= __put_user(retcode_addr, &frame->pretcode);
4852
4853 /* moveq #,d0; trap #0 */
4854
4855 err |= __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16),
4856 (long *)(frame->retcode));
4857
4858 if (err)
4859 goto give_sigsegv;
4860
4861 /* Set up to return from userspace */
4862
4863 env->aregs[7] = frame_addr;
4864 env->pc = ka->_sa_handler;
4865
4866 unlock_user_struct(frame, frame_addr, 1);
4867 return;
4868
4869 give_sigsegv:
4870 unlock_user_struct(frame, frame_addr, 1);
4871 force_sig(TARGET_SIGSEGV);
4872 }
4873
4874 static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
4875 CPUM68KState *env)
4876 {
4877 target_greg_t *gregs = uc->tuc_mcontext.gregs;
4878 int err;
4879
4880 err = __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version);
4881 err |= __put_user(env->dregs[0], &gregs[0]);
4882 err |= __put_user(env->dregs[1], &gregs[1]);
4883 err |= __put_user(env->dregs[2], &gregs[2]);
4884 err |= __put_user(env->dregs[3], &gregs[3]);
4885 err |= __put_user(env->dregs[4], &gregs[4]);
4886 err |= __put_user(env->dregs[5], &gregs[5]);
4887 err |= __put_user(env->dregs[6], &gregs[6]);
4888 err |= __put_user(env->dregs[7], &gregs[7]);
4889 err |= __put_user(env->aregs[0], &gregs[8]);
4890 err |= __put_user(env->aregs[1], &gregs[9]);
4891 err |= __put_user(env->aregs[2], &gregs[10]);
4892 err |= __put_user(env->aregs[3], &gregs[11]);
4893 err |= __put_user(env->aregs[4], &gregs[12]);
4894 err |= __put_user(env->aregs[5], &gregs[13]);
4895 err |= __put_user(env->aregs[6], &gregs[14]);
4896 err |= __put_user(env->aregs[7], &gregs[15]);
4897 err |= __put_user(env->pc, &gregs[16]);
4898 err |= __put_user(env->sr, &gregs[17]);
4899
4900 return err;
4901 }
4902
4903 static inline int target_rt_restore_ucontext(CPUM68KState *env,
4904 struct target_ucontext *uc,
4905 int *pd0)
4906 {
4907 int temp;
4908 int err;
4909 target_greg_t *gregs = uc->tuc_mcontext.gregs;
4910
4911 err = __get_user(temp, &uc->tuc_mcontext.version);
4912 if (temp != TARGET_MCONTEXT_VERSION)
4913 goto badframe;
4914
4915 /* restore passed registers */
4916 err |= __get_user(env->dregs[0], &gregs[0]);
4917 err |= __get_user(env->dregs[1], &gregs[1]);
4918 err |= __get_user(env->dregs[2], &gregs[2]);
4919 err |= __get_user(env->dregs[3], &gregs[3]);
4920 err |= __get_user(env->dregs[4], &gregs[4]);
4921 err |= __get_user(env->dregs[5], &gregs[5]);
4922 err |= __get_user(env->dregs[6], &gregs[6]);
4923 err |= __get_user(env->dregs[7], &gregs[7]);
4924 err |= __get_user(env->aregs[0], &gregs[8]);
4925 err |= __get_user(env->aregs[1], &gregs[9]);
4926 err |= __get_user(env->aregs[2], &gregs[10]);
4927 err |= __get_user(env->aregs[3], &gregs[11]);
4928 err |= __get_user(env->aregs[4], &gregs[12]);
4929 err |= __get_user(env->aregs[5], &gregs[13]);
4930 err |= __get_user(env->aregs[6], &gregs[14]);
4931 err |= __get_user(env->aregs[7], &gregs[15]);
4932 err |= __get_user(env->pc, &gregs[16]);
4933 err |= __get_user(temp, &gregs[17]);
4934 env->sr = (env->sr & 0xff00) | (temp & 0xff);
4935
4936 *pd0 = env->dregs[0];
4937 return err;
4938
4939 badframe:
4940 return 1;
4941 }
4942
4943 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4944 target_siginfo_t *info,
4945 target_sigset_t *set, CPUM68KState *env)
4946 {
4947 struct target_rt_sigframe *frame;
4948 abi_ulong frame_addr;
4949 abi_ulong retcode_addr;
4950 abi_ulong info_addr;
4951 abi_ulong uc_addr;
4952 int err = 0;
4953 int i;
4954
4955 frame_addr = get_sigframe(ka, env, sizeof *frame);
4956 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
4957 goto give_sigsegv;
4958
4959 err |= __put_user(sig, &frame->sig);
4960
4961 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
4962 err |= __put_user(info_addr, &frame->pinfo);
4963
4964 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
4965 err |= __put_user(uc_addr, &frame->puc);
4966
4967 err |= copy_siginfo_to_user(&frame->info, info);
4968
4969 /* Create the ucontext */
4970
4971 err |= __put_user(0, &frame->uc.tuc_flags);
4972 err |= __put_user(0, &frame->uc.tuc_link);
4973 err |= __put_user(target_sigaltstack_used.ss_sp,
4974 &frame->uc.tuc_stack.ss_sp);
4975 err |= __put_user(sas_ss_flags(env->aregs[7]),
4976 &frame->uc.tuc_stack.ss_flags);
4977 err |= __put_user(target_sigaltstack_used.ss_size,
4978 &frame->uc.tuc_stack.ss_size);
4979 err |= target_rt_setup_ucontext(&frame->uc, env);
4980
4981 if (err)
4982 goto give_sigsegv;
4983
4984 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
4985 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
4986 goto give_sigsegv;
4987 }
4988
4989 /* Set up to return from userspace. */
4990
4991 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
4992 err |= __put_user(retcode_addr, &frame->pretcode);
4993
4994 /* moveq #,d0; notb d0; trap #0 */
4995
4996 err |= __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
4997 (long *)(frame->retcode + 0));
4998 err |= __put_user(0x4e40, (short *)(frame->retcode + 4));
4999
5000 if (err)
5001 goto give_sigsegv;
5002
5003 /* Set up to return from userspace */
5004
5005 env->aregs[7] = frame_addr;
5006 env->pc = ka->_sa_handler;
5007
5008 unlock_user_struct(frame, frame_addr, 1);
5009 return;
5010
5011 give_sigsegv:
5012 unlock_user_struct(frame, frame_addr, 1);
5013 force_sig(TARGET_SIGSEGV);
5014 }
5015
5016 long do_sigreturn(CPUM68KState *env)
5017 {
5018 struct target_sigframe *frame;
5019 abi_ulong frame_addr = env->aregs[7] - 4;
5020 target_sigset_t target_set;
5021 sigset_t set;
5022 int d0, i;
5023
5024 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
5025 goto badframe;
5026
5027 /* set blocked signals */
5028
5029 if (__get_user(target_set.sig[0], &frame->sc.sc_mask))
5030 goto badframe;
5031
5032 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
5033 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
5034 goto badframe;
5035 }
5036
5037 target_to_host_sigset_internal(&set, &target_set);
5038 sigprocmask(SIG_SETMASK, &set, NULL);
5039
5040 /* restore registers */
5041
5042 if (restore_sigcontext(env, &frame->sc, &d0))
5043 goto badframe;
5044
5045 unlock_user_struct(frame, frame_addr, 0);
5046 return d0;
5047
5048 badframe:
5049 unlock_user_struct(frame, frame_addr, 0);
5050 force_sig(TARGET_SIGSEGV);
5051 return 0;
5052 }
5053
5054 long do_rt_sigreturn(CPUM68KState *env)
5055 {
5056 struct target_rt_sigframe *frame;
5057 abi_ulong frame_addr = env->aregs[7] - 4;
5058 target_sigset_t target_set;
5059 sigset_t set;
5060 int d0;
5061
5062 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
5063 goto badframe;
5064
5065 target_to_host_sigset_internal(&set, &target_set);
5066 sigprocmask(SIG_SETMASK, &set, NULL);
5067
5068 /* restore registers */
5069
5070 if (target_rt_restore_ucontext(env, &frame->uc, &d0))
5071 goto badframe;
5072
5073 if (do_sigaltstack(frame_addr +
5074 offsetof(struct target_rt_sigframe, uc.tuc_stack),
5075 0, get_sp_from_cpustate(env)) == -EFAULT)
5076 goto badframe;
5077
5078 unlock_user_struct(frame, frame_addr, 0);
5079 return d0;
5080
5081 badframe:
5082 unlock_user_struct(frame, frame_addr, 0);
5083 force_sig(TARGET_SIGSEGV);
5084 return 0;
5085 }
5086
5087 #elif defined(TARGET_ALPHA)
5088
5089 struct target_sigcontext {
5090 abi_long sc_onstack;
5091 abi_long sc_mask;
5092 abi_long sc_pc;
5093 abi_long sc_ps;
5094 abi_long sc_regs[32];
5095 abi_long sc_ownedfp;
5096 abi_long sc_fpregs[32];
5097 abi_ulong sc_fpcr;
5098 abi_ulong sc_fp_control;
5099 abi_ulong sc_reserved1;
5100 abi_ulong sc_reserved2;
5101 abi_ulong sc_ssize;
5102 abi_ulong sc_sbase;
5103 abi_ulong sc_traparg_a0;
5104 abi_ulong sc_traparg_a1;
5105 abi_ulong sc_traparg_a2;
5106 abi_ulong sc_fp_trap_pc;
5107 abi_ulong sc_fp_trigger_sum;
5108 abi_ulong sc_fp_trigger_inst;
5109 };
5110
5111 struct target_ucontext {
5112 abi_ulong tuc_flags;
5113 abi_ulong tuc_link;
5114 abi_ulong tuc_osf_sigmask;
5115 target_stack_t tuc_stack;
5116 struct target_sigcontext tuc_mcontext;
5117 target_sigset_t tuc_sigmask;
5118 };
5119
5120 struct target_sigframe {
5121 struct target_sigcontext sc;
5122 unsigned int retcode[3];
5123 };
5124
5125 struct target_rt_sigframe {
5126 target_siginfo_t info;
5127 struct target_ucontext uc;
5128 unsigned int retcode[3];
5129 };
5130
5131 #define INSN_MOV_R30_R16 0x47fe0410
5132 #define INSN_LDI_R0 0x201f0000
5133 #define INSN_CALLSYS 0x00000083
5134
5135 static int setup_sigcontext(struct target_sigcontext *sc, CPUAlphaState *env,
5136 abi_ulong frame_addr, target_sigset_t *set)
5137 {
5138 int i, err = 0;
5139
5140 err |= __put_user(on_sig_stack(frame_addr), &sc->sc_onstack);
5141 err |= __put_user(set->sig[0], &sc->sc_mask);
5142 err |= __put_user(env->pc, &sc->sc_pc);
5143 err |= __put_user(8, &sc->sc_ps);
5144
5145 for (i = 0; i < 31; ++i) {
5146 err |= __put_user(env->ir[i], &sc->sc_regs[i]);
5147 }
5148 err |= __put_user(0, &sc->sc_regs[31]);
5149
5150 for (i = 0; i < 31; ++i) {
5151 err |= __put_user(env->fir[i], &sc->sc_fpregs[i]);
5152 }
5153 err |= __put_user(0, &sc->sc_fpregs[31]);
5154 err |= __put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr);
5155
5156 err |= __put_user(0, &sc->sc_traparg_a0); /* FIXME */
5157 err |= __put_user(0, &sc->sc_traparg_a1); /* FIXME */
5158 err |= __put_user(0, &sc->sc_traparg_a2); /* FIXME */
5159
5160 return err;
5161 }
5162
5163 static int restore_sigcontext(CPUAlphaState *env,
5164 struct target_sigcontext *sc)
5165 {
5166 uint64_t fpcr;
5167 int i, err = 0;
5168
5169 err |= __get_user(env->pc, &sc->sc_pc);
5170
5171 for (i = 0; i < 31; ++i) {
5172 err |= __get_user(env->ir[i], &sc->sc_regs[i]);
5173 }
5174 for (i = 0; i < 31; ++i) {
5175 err |= __get_user(env->fir[i], &sc->sc_fpregs[i]);
5176 }
5177
5178 err |= __get_user(fpcr, &sc->sc_fpcr);
5179 cpu_alpha_store_fpcr(env, fpcr);
5180
5181 return err;
5182 }
5183
5184 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
5185 CPUAlphaState *env,
5186 unsigned long framesize)
5187 {
5188 abi_ulong sp = env->ir[IR_SP];
5189
5190 /* This is the X/Open sanctioned signal stack switching. */
5191 if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) {
5192 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
5193 }
5194 return (sp - framesize) & -32;
5195 }
5196
5197 static void setup_frame(int sig, struct target_sigaction *ka,
5198 target_sigset_t *set, CPUAlphaState *env)
5199 {
5200 abi_ulong frame_addr, r26;
5201 struct target_sigframe *frame;
5202 int err = 0;
5203
5204 frame_addr = get_sigframe(ka, env, sizeof(*frame));
5205 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5206 goto give_sigsegv;
5207 }
5208
5209 err |= setup_sigcontext(&frame->sc, env, frame_addr, set);
5210
5211 if (ka->sa_restorer) {
5212 r26 = ka->sa_restorer;
5213 } else {
5214 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
5215 err |= __put_user(INSN_LDI_R0 + TARGET_NR_sigreturn,
5216 &frame->retcode[1]);
5217 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]);
5218 /* imb() */
5219 r26 = frame_addr;
5220 }
5221
5222 unlock_user_struct(frame, frame_addr, 1);
5223
5224 if (err) {
5225 give_sigsegv:
5226 if (sig == TARGET_SIGSEGV) {
5227 ka->_sa_handler = TARGET_SIG_DFL;
5228 }
5229 force_sig(TARGET_SIGSEGV);
5230 }
5231
5232 env->ir[IR_RA] = r26;
5233 env->ir[IR_PV] = env->pc = ka->_sa_handler;
5234 env->ir[IR_A0] = sig;
5235 env->ir[IR_A1] = 0;
5236 env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc);
5237 env->ir[IR_SP] = frame_addr;
5238 }
5239
5240 static void setup_rt_frame(int sig, struct target_sigaction *ka,
5241 target_siginfo_t *info,
5242 target_sigset_t *set, CPUAlphaState *env)
5243 {
5244 abi_ulong frame_addr, r26;
5245 struct target_rt_sigframe *frame;
5246 int i, err = 0;
5247
5248 frame_addr = get_sigframe(ka, env, sizeof(*frame));
5249 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5250 goto give_sigsegv;
5251 }
5252
5253 err |= copy_siginfo_to_user(&frame->info, info);
5254
5255 err |= __put_user(0, &frame->uc.tuc_flags);
5256 err |= __put_user(0, &frame->uc.tuc_link);
5257 err |= __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask);
5258 err |= __put_user(target_sigaltstack_used.ss_sp,
5259 &frame->uc.tuc_stack.ss_sp);
5260 err |= __put_user(sas_ss_flags(env->ir[IR_SP]),
5261 &frame->uc.tuc_stack.ss_flags);
5262 err |= __put_user(target_sigaltstack_used.ss_size,
5263 &frame->uc.tuc_stack.ss_size);
5264 err |= setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set);
5265 for (i = 0; i < TARGET_NSIG_WORDS; ++i) {
5266 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
5267 }
5268
5269 if (ka->sa_restorer) {
5270 r26 = ka->sa_restorer;
5271 } else {
5272 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
5273 err |= __put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn,
5274 &frame->retcode[1]);
5275 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]);
5276 /* imb(); */
5277 r26 = frame_addr;
5278 }
5279
5280 if (err) {
5281 give_sigsegv:
5282 if (sig == TARGET_SIGSEGV) {
5283 ka->_sa_handler = TARGET_SIG_DFL;
5284 }
5285 force_sig(TARGET_SIGSEGV);
5286 }
5287
5288 env->ir[IR_RA] = r26;
5289 env->ir[IR_PV] = env->pc = ka->_sa_handler;
5290 env->ir[IR_A0] = sig;
5291 env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info);
5292 env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
5293 env->ir[IR_SP] = frame_addr;
5294 }
5295
5296 long do_sigreturn(CPUAlphaState *env)
5297 {
5298 struct target_sigcontext *sc;
5299 abi_ulong sc_addr = env->ir[IR_A0];
5300 target_sigset_t target_set;
5301 sigset_t set;
5302
5303 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) {
5304 goto badframe;
5305 }
5306
5307 target_sigemptyset(&target_set);
5308 if (__get_user(target_set.sig[0], &sc->sc_mask)) {
5309 goto badframe;
5310 }
5311
5312 target_to_host_sigset_internal(&set, &target_set);
5313 sigprocmask(SIG_SETMASK, &set, NULL);
5314
5315 if (restore_sigcontext(env, sc)) {
5316 goto badframe;
5317 }
5318 unlock_user_struct(sc, sc_addr, 0);
5319 return env->ir[IR_V0];
5320
5321 badframe:
5322 unlock_user_struct(sc, sc_addr, 0);
5323 force_sig(TARGET_SIGSEGV);
5324 }
5325
5326 long do_rt_sigreturn(CPUAlphaState *env)
5327 {
5328 abi_ulong frame_addr = env->ir[IR_A0];
5329 struct target_rt_sigframe *frame;
5330 sigset_t set;
5331
5332 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
5333 goto badframe;
5334 }
5335 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
5336 sigprocmask(SIG_SETMASK, &set, NULL);
5337
5338 if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
5339 goto badframe;
5340 }
5341 if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
5342 uc.tuc_stack),
5343 0, env->ir[IR_SP]) == -EFAULT) {
5344 goto badframe;
5345 }
5346
5347 unlock_user_struct(frame, frame_addr, 0);
5348 return env->ir[IR_V0];
5349
5350
5351 badframe:
5352 unlock_user_struct(frame, frame_addr, 0);
5353 force_sig(TARGET_SIGSEGV);
5354 }
5355
5356 #else
5357
5358 static void setup_frame(int sig, struct target_sigaction *ka,
5359 target_sigset_t *set, CPUArchState *env)
5360 {
5361 fprintf(stderr, "setup_frame: not implemented\n");
5362 }
5363
5364 static void setup_rt_frame(int sig, struct target_sigaction *ka,
5365 target_siginfo_t *info,
5366 target_sigset_t *set, CPUArchState *env)
5367 {
5368 fprintf(stderr, "setup_rt_frame: not implemented\n");
5369 }
5370
5371 long do_sigreturn(CPUArchState *env)
5372 {
5373 fprintf(stderr, "do_sigreturn: not implemented\n");
5374 return -TARGET_ENOSYS;
5375 }
5376
5377 long do_rt_sigreturn(CPUArchState *env)
5378 {
5379 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
5380 return -TARGET_ENOSYS;
5381 }
5382
5383 #endif
5384
5385 void process_pending_signals(CPUArchState *cpu_env)
5386 {
5387 int sig;
5388 abi_ulong handler;
5389 sigset_t set, old_set;
5390 target_sigset_t target_old_set;
5391 struct emulated_sigtable *k;
5392 struct target_sigaction *sa;
5393 struct sigqueue *q;
5394 TaskState *ts = cpu_env->opaque;
5395
5396 if (!ts->signal_pending)
5397 return;
5398
5399 /* FIXME: This is not threadsafe. */
5400 k = ts->sigtab;
5401 for(sig = 1; sig <= TARGET_NSIG; sig++) {
5402 if (k->pending)
5403 goto handle_signal;
5404 k++;
5405 }
5406 /* if no signal is pending, just return */
5407 ts->signal_pending = 0;
5408 return;
5409
5410 handle_signal:
5411 #ifdef DEBUG_SIGNAL
5412 fprintf(stderr, "qemu: process signal %d\n", sig);
5413 #endif
5414 /* dequeue signal */
5415 q = k->first;
5416 k->first = q->next;
5417 if (!k->first)
5418 k->pending = 0;
5419
5420 sig = gdb_handlesig (cpu_env, sig);
5421 if (!sig) {
5422 sa = NULL;
5423 handler = TARGET_SIG_IGN;
5424 } else {
5425 sa = &sigact_table[sig - 1];
5426 handler = sa->_sa_handler;
5427 }
5428
5429 if (handler == TARGET_SIG_DFL) {
5430 /* default handler : ignore some signal. The other are job control or fatal */
5431 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
5432 kill(getpid(),SIGSTOP);
5433 } else if (sig != TARGET_SIGCHLD &&
5434 sig != TARGET_SIGURG &&
5435 sig != TARGET_SIGWINCH &&
5436 sig != TARGET_SIGCONT) {
5437 force_sig(sig);
5438 }
5439 } else if (handler == TARGET_SIG_IGN) {
5440 /* ignore sig */
5441 } else if (handler == TARGET_SIG_ERR) {
5442 force_sig(sig);
5443 } else {
5444 /* compute the blocked signals during the handler execution */
5445 target_to_host_sigset(&set, &sa->sa_mask);
5446 /* SA_NODEFER indicates that the current signal should not be
5447 blocked during the handler */
5448 if (!(sa->sa_flags & TARGET_SA_NODEFER))
5449 sigaddset(&set, target_to_host_signal(sig));
5450
5451 /* block signals in the handler using Linux */
5452 sigprocmask(SIG_BLOCK, &set, &old_set);
5453 /* save the previous blocked signal state to restore it at the
5454 end of the signal execution (see do_sigreturn) */
5455 host_to_target_sigset_internal(&target_old_set, &old_set);
5456
5457 /* if the CPU is in VM86 mode, we restore the 32 bit values */
5458 #if defined(TARGET_I386) && !defined(TARGET_X86_64)
5459 {
5460 CPUX86State *env = cpu_env;
5461 if (env->eflags & VM_MASK)
5462 save_v86_state(env);
5463 }
5464 #endif
5465 /* prepare the stack frame of the virtual CPU */
5466 #if defined(TARGET_ABI_MIPSN32) || defined(TARGET_ABI_MIPSN64)
5467 /* These targets do not have traditional signals. */
5468 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
5469 #else
5470 if (sa->sa_flags & TARGET_SA_SIGINFO)
5471 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
5472 else
5473 setup_frame(sig, sa, &target_old_set, cpu_env);
5474 #endif
5475 if (sa->sa_flags & TARGET_SA_RESETHAND)
5476 sa->_sa_handler = TARGET_SIG_DFL;
5477 }
5478 if (q != &k->info)
5479 free_sigqueue(cpu_env, q);
5480 }
QEmu