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PPC: Fix rldcl
[qemu/agraf.git] / linux-user / signal.c
blob10555072240bc42c1f1806bdd0b848f3cc1cbf96
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(regs->active_tc.PC, &sc->sc_pc);
2532
2533 __put_user(0, &sc->sc_regs[0]);
2534 for (i = 1; i < 32; ++i) {
2535 err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
2536 }
2537
2538 err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2539 err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2540
2541 /* Rather than checking for dsp existence, always copy. The storage
2542 would just be garbage otherwise. */
2543 err |= __put_user(regs->active_tc.HI[1], &sc->sc_hi1);
2544 err |= __put_user(regs->active_tc.HI[2], &sc->sc_hi2);
2545 err |= __put_user(regs->active_tc.HI[3], &sc->sc_hi3);
2546 err |= __put_user(regs->active_tc.LO[1], &sc->sc_lo1);
2547 err |= __put_user(regs->active_tc.LO[2], &sc->sc_lo2);
2548 err |= __put_user(regs->active_tc.LO[3], &sc->sc_lo3);
2549 {
2550 uint32_t dsp = cpu_rddsp(0x3ff, regs);
2551 err |= __put_user(dsp, &sc->sc_dsp);
2552 }
2553
2554 err |= __put_user(1, &sc->sc_used_math);
2555
2556 for (i = 0; i < 32; ++i) {
2557 err |= __put_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
2558 }
2559
2560 return err;
2561 }
2562
2563 static inline int
2564 restore_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc)
2565 {
2566 int err = 0;
2567 int i;
2568
2569 err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
2570
2571 err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2572 err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2573
2574 for (i = 1; i < 32; ++i) {
2575 err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
2576 }
2577
2578 err |= __get_user(regs->active_tc.HI[1], &sc->sc_hi1);
2579 err |= __get_user(regs->active_tc.HI[2], &sc->sc_hi2);
2580 err |= __get_user(regs->active_tc.HI[3], &sc->sc_hi3);
2581 err |= __get_user(regs->active_tc.LO[1], &sc->sc_lo1);
2582 err |= __get_user(regs->active_tc.LO[2], &sc->sc_lo2);
2583 err |= __get_user(regs->active_tc.LO[3], &sc->sc_lo3);
2584 {
2585 uint32_t dsp;
2586 err |= __get_user(dsp, &sc->sc_dsp);
2587 cpu_wrdsp(dsp, 0x3ff, regs);
2588 }
2589
2590 for (i = 0; i < 32; ++i) {
2591 err |= __get_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
2592 }
2593
2594 return err;
2595 }
2596
2597 /*
2598 * Determine which stack to use..
2599 */
2600 static inline abi_ulong
2601 get_sigframe(struct target_sigaction *ka, CPUMIPSState *regs, size_t frame_size)
2602 {
2603 unsigned long sp;
2604
2605 /* Default to using normal stack */
2606 sp = regs->active_tc.gpr[29];
2607
2608 /*
2609 * FPU emulator may have its own trampoline active just
2610 * above the user stack, 16-bytes before the next lowest
2611 * 16 byte boundary. Try to avoid trashing it.
2612 */
2613 sp -= 32;
2614
2615 /* This is the X/Open sanctioned signal stack switching. */
2616 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
2617 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2618 }
2619
2620 return (sp - frame_size) & ~7;
2621 }
2622
2623 # if defined(TARGET_ABI_MIPSO32)
2624 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */
2625 static void setup_frame(int sig, struct target_sigaction * ka,
2626 target_sigset_t *set, CPUMIPSState *regs)
2627 {
2628 struct sigframe *frame;
2629 abi_ulong frame_addr;
2630 int i;
2631
2632 frame_addr = get_sigframe(ka, regs, sizeof(*frame));
2633 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2634 goto give_sigsegv;
2635
2636 install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
2637
2638 if(setup_sigcontext(regs, &frame->sf_sc))
2639 goto give_sigsegv;
2640
2641 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2642 if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
2643 goto give_sigsegv;
2644 }
2645
2646 /*
2647 * Arguments to signal handler:
2648 *
2649 * a0 = signal number
2650 * a1 = 0 (should be cause)
2651 * a2 = pointer to struct sigcontext
2652 *
2653 * $25 and PC point to the signal handler, $29 points to the
2654 * struct sigframe.
2655 */
2656 regs->active_tc.gpr[ 4] = sig;
2657 regs->active_tc.gpr[ 5] = 0;
2658 regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
2659 regs->active_tc.gpr[29] = frame_addr;
2660 regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
2661 /* The original kernel code sets CP0_EPC to the handler
2662 * since it returns to userland using eret
2663 * we cannot do this here, and we must set PC directly */
2664 regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
2665 unlock_user_struct(frame, frame_addr, 1);
2666 return;
2667
2668 give_sigsegv:
2669 unlock_user_struct(frame, frame_addr, 1);
2670 force_sig(TARGET_SIGSEGV/*, current*/);
2671 }
2672
2673 long do_sigreturn(CPUMIPSState *regs)
2674 {
2675 struct sigframe *frame;
2676 abi_ulong frame_addr;
2677 sigset_t blocked;
2678 target_sigset_t target_set;
2679 int i;
2680
2681 #if defined(DEBUG_SIGNAL)
2682 fprintf(stderr, "do_sigreturn\n");
2683 #endif
2684 frame_addr = regs->active_tc.gpr[29];
2685 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2686 goto badframe;
2687
2688 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2689 if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
2690 goto badframe;
2691 }
2692
2693 target_to_host_sigset_internal(&blocked, &target_set);
2694 sigprocmask(SIG_SETMASK, &blocked, NULL);
2695
2696 if (restore_sigcontext(regs, &frame->sf_sc))
2697 goto badframe;
2698
2699 #if 0
2700 /*
2701 * Don't let your children do this ...
2702 */
2703 __asm__ __volatile__(
2704 "move\t$29, %0\n\t"
2705 "j\tsyscall_exit"
2706 :/* no outputs */
2707 :"r" (&regs));
2708 /* Unreached */
2709 #endif
2710
2711 regs->active_tc.PC = regs->CP0_EPC;
2712 /* I am not sure this is right, but it seems to work
2713 * maybe a problem with nested signals ? */
2714 regs->CP0_EPC = 0;
2715 return -TARGET_QEMU_ESIGRETURN;
2716
2717 badframe:
2718 force_sig(TARGET_SIGSEGV/*, current*/);
2719 return 0;
2720 }
2721 # endif /* O32 */
2722
2723 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2724 target_siginfo_t *info,
2725 target_sigset_t *set, CPUMIPSState *env)
2726 {
2727 struct target_rt_sigframe *frame;
2728 abi_ulong frame_addr;
2729 int i;
2730
2731 frame_addr = get_sigframe(ka, env, sizeof(*frame));
2732 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2733 goto give_sigsegv;
2734
2735 install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn);
2736
2737 copy_siginfo_to_user(&frame->rs_info, info);
2738
2739 __put_user(0, &frame->rs_uc.tuc_flags);
2740 __put_user(0, &frame->rs_uc.tuc_link);
2741 __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp);
2742 __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size);
2743 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
2744 &frame->rs_uc.tuc_stack.ss_flags);
2745
2746 setup_sigcontext(env, &frame->rs_uc.tuc_mcontext);
2747
2748 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2749 __put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]);
2750 }
2751
2752 /*
2753 * Arguments to signal handler:
2754 *
2755 * a0 = signal number
2756 * a1 = pointer to siginfo_t
2757 * a2 = pointer to struct ucontext
2758 *
2759 * $25 and PC point to the signal handler, $29 points to the
2760 * struct sigframe.
2761 */
2762 env->active_tc.gpr[ 4] = sig;
2763 env->active_tc.gpr[ 5] = frame_addr
2764 + offsetof(struct target_rt_sigframe, rs_info);
2765 env->active_tc.gpr[ 6] = frame_addr
2766 + offsetof(struct target_rt_sigframe, rs_uc);
2767 env->active_tc.gpr[29] = frame_addr;
2768 env->active_tc.gpr[31] = frame_addr
2769 + offsetof(struct target_rt_sigframe, rs_code);
2770 /* The original kernel code sets CP0_EPC to the handler
2771 * since it returns to userland using eret
2772 * we cannot do this here, and we must set PC directly */
2773 env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
2774 unlock_user_struct(frame, frame_addr, 1);
2775 return;
2776
2777 give_sigsegv:
2778 unlock_user_struct(frame, frame_addr, 1);
2779 force_sig(TARGET_SIGSEGV/*, current*/);
2780 }
2781
2782 long do_rt_sigreturn(CPUMIPSState *env)
2783 {
2784 struct target_rt_sigframe *frame;
2785 abi_ulong frame_addr;
2786 sigset_t blocked;
2787
2788 #if defined(DEBUG_SIGNAL)
2789 fprintf(stderr, "do_rt_sigreturn\n");
2790 #endif
2791 frame_addr = env->active_tc.gpr[29];
2792 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2793 goto badframe;
2794
2795 target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask);
2796 sigprocmask(SIG_SETMASK, &blocked, NULL);
2797
2798 if (restore_sigcontext(env, &frame->rs_uc.tuc_mcontext))
2799 goto badframe;
2800
2801 if (do_sigaltstack(frame_addr +
2802 offsetof(struct target_rt_sigframe, rs_uc.tuc_stack),
2803 0, get_sp_from_cpustate(env)) == -EFAULT)
2804 goto badframe;
2805
2806 env->active_tc.PC = env->CP0_EPC;
2807 /* I am not sure this is right, but it seems to work
2808 * maybe a problem with nested signals ? */
2809 env->CP0_EPC = 0;
2810 return -TARGET_QEMU_ESIGRETURN;
2811
2812 badframe:
2813 force_sig(TARGET_SIGSEGV/*, current*/);
2814 return 0;
2815 }
2816
2817 #elif defined(TARGET_SH4)
2818
2819 /*
2820 * code and data structures from linux kernel:
2821 * include/asm-sh/sigcontext.h
2822 * arch/sh/kernel/signal.c
2823 */
2824
2825 struct target_sigcontext {
2826 target_ulong oldmask;
2827
2828 /* CPU registers */
2829 target_ulong sc_gregs[16];
2830 target_ulong sc_pc;
2831 target_ulong sc_pr;
2832 target_ulong sc_sr;
2833 target_ulong sc_gbr;
2834 target_ulong sc_mach;
2835 target_ulong sc_macl;
2836
2837 /* FPU registers */
2838 target_ulong sc_fpregs[16];
2839 target_ulong sc_xfpregs[16];
2840 unsigned int sc_fpscr;
2841 unsigned int sc_fpul;
2842 unsigned int sc_ownedfp;
2843 };
2844
2845 struct target_sigframe
2846 {
2847 struct target_sigcontext sc;
2848 target_ulong extramask[TARGET_NSIG_WORDS-1];
2849 uint16_t retcode[3];
2850 };
2851
2852
2853 struct target_ucontext {
2854 target_ulong tuc_flags;
2855 struct target_ucontext *tuc_link;
2856 target_stack_t tuc_stack;
2857 struct target_sigcontext tuc_mcontext;
2858 target_sigset_t tuc_sigmask; /* mask last for extensibility */
2859 };
2860
2861 struct target_rt_sigframe
2862 {
2863 struct target_siginfo info;
2864 struct target_ucontext uc;
2865 uint16_t retcode[3];
2866 };
2867
2868
2869 #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
2870 #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
2871
2872 static abi_ulong get_sigframe(struct target_sigaction *ka,
2873 unsigned long sp, size_t frame_size)
2874 {
2875 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
2876 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2877 }
2878
2879 return (sp - frame_size) & -8ul;
2880 }
2881
2882 static int setup_sigcontext(struct target_sigcontext *sc,
2883 CPUSH4State *regs, unsigned long mask)
2884 {
2885 int err = 0;
2886 int i;
2887
2888 #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
2889 COPY(gregs[0]); COPY(gregs[1]);
2890 COPY(gregs[2]); COPY(gregs[3]);
2891 COPY(gregs[4]); COPY(gregs[5]);
2892 COPY(gregs[6]); COPY(gregs[7]);
2893 COPY(gregs[8]); COPY(gregs[9]);
2894 COPY(gregs[10]); COPY(gregs[11]);
2895 COPY(gregs[12]); COPY(gregs[13]);
2896 COPY(gregs[14]); COPY(gregs[15]);
2897 COPY(gbr); COPY(mach);
2898 COPY(macl); COPY(pr);
2899 COPY(sr); COPY(pc);
2900 #undef COPY
2901
2902 for (i=0; i<16; i++) {
2903 err |= __put_user(regs->fregs[i], &sc->sc_fpregs[i]);
2904 }
2905 err |= __put_user(regs->fpscr, &sc->sc_fpscr);
2906 err |= __put_user(regs->fpul, &sc->sc_fpul);
2907
2908 /* non-iBCS2 extensions.. */
2909 err |= __put_user(mask, &sc->oldmask);
2910
2911 return err;
2912 }
2913
2914 static int restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc,
2915 target_ulong *r0_p)
2916 {
2917 unsigned int err = 0;
2918 int i;
2919
2920 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
2921 COPY(gregs[1]);
2922 COPY(gregs[2]); COPY(gregs[3]);
2923 COPY(gregs[4]); COPY(gregs[5]);
2924 COPY(gregs[6]); COPY(gregs[7]);
2925 COPY(gregs[8]); COPY(gregs[9]);
2926 COPY(gregs[10]); COPY(gregs[11]);
2927 COPY(gregs[12]); COPY(gregs[13]);
2928 COPY(gregs[14]); COPY(gregs[15]);
2929 COPY(gbr); COPY(mach);
2930 COPY(macl); COPY(pr);
2931 COPY(sr); COPY(pc);
2932 #undef COPY
2933
2934 for (i=0; i<16; i++) {
2935 err |= __get_user(regs->fregs[i], &sc->sc_fpregs[i]);
2936 }
2937 err |= __get_user(regs->fpscr, &sc->sc_fpscr);
2938 err |= __get_user(regs->fpul, &sc->sc_fpul);
2939
2940 regs->tra = -1; /* disable syscall checks */
2941 err |= __get_user(*r0_p, &sc->sc_gregs[0]);
2942 return err;
2943 }
2944
2945 static void setup_frame(int sig, struct target_sigaction *ka,
2946 target_sigset_t *set, CPUSH4State *regs)
2947 {
2948 struct target_sigframe *frame;
2949 abi_ulong frame_addr;
2950 int i;
2951 int err = 0;
2952 int signal;
2953
2954 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
2955 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2956 goto give_sigsegv;
2957
2958 signal = current_exec_domain_sig(sig);
2959
2960 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
2961
2962 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
2963 err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
2964 }
2965
2966 /* Set up to return from userspace. If provided, use a stub
2967 already in userspace. */
2968 if (ka->sa_flags & TARGET_SA_RESTORER) {
2969 regs->pr = (unsigned long) ka->sa_restorer;
2970 } else {
2971 /* Generate return code (system call to sigreturn) */
2972 err |= __put_user(MOVW(2), &frame->retcode[0]);
2973 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
2974 err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
2975 regs->pr = (unsigned long) frame->retcode;
2976 }
2977
2978 if (err)
2979 goto give_sigsegv;
2980
2981 /* Set up registers for signal handler */
2982 regs->gregs[15] = frame_addr;
2983 regs->gregs[4] = signal; /* Arg for signal handler */
2984 regs->gregs[5] = 0;
2985 regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc);
2986 regs->pc = (unsigned long) ka->_sa_handler;
2987
2988 unlock_user_struct(frame, frame_addr, 1);
2989 return;
2990
2991 give_sigsegv:
2992 unlock_user_struct(frame, frame_addr, 1);
2993 force_sig(TARGET_SIGSEGV);
2994 }
2995
2996 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2997 target_siginfo_t *info,
2998 target_sigset_t *set, CPUSH4State *regs)
2999 {
3000 struct target_rt_sigframe *frame;
3001 abi_ulong frame_addr;
3002 int i;
3003 int err = 0;
3004 int signal;
3005
3006 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
3007 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3008 goto give_sigsegv;
3009
3010 signal = current_exec_domain_sig(sig);
3011
3012 err |= copy_siginfo_to_user(&frame->info, info);
3013
3014 /* Create the ucontext. */
3015 err |= __put_user(0, &frame->uc.tuc_flags);
3016 err |= __put_user(0, (unsigned long *)&frame->uc.tuc_link);
3017 err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp,
3018 &frame->uc.tuc_stack.ss_sp);
3019 err |= __put_user(sas_ss_flags(regs->gregs[15]),
3020 &frame->uc.tuc_stack.ss_flags);
3021 err |= __put_user(target_sigaltstack_used.ss_size,
3022 &frame->uc.tuc_stack.ss_size);
3023 err |= setup_sigcontext(&frame->uc.tuc_mcontext,
3024 regs, set->sig[0]);
3025 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
3026 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
3027 }
3028
3029 /* Set up to return from userspace. If provided, use a stub
3030 already in userspace. */
3031 if (ka->sa_flags & TARGET_SA_RESTORER) {
3032 regs->pr = (unsigned long) ka->sa_restorer;
3033 } else {
3034 /* Generate return code (system call to sigreturn) */
3035 err |= __put_user(MOVW(2), &frame->retcode[0]);
3036 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
3037 err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
3038 regs->pr = (unsigned long) frame->retcode;
3039 }
3040
3041 if (err)
3042 goto give_sigsegv;
3043
3044 /* Set up registers for signal handler */
3045 regs->gregs[15] = frame_addr;
3046 regs->gregs[4] = signal; /* Arg for signal handler */
3047 regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info);
3048 regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc);
3049 regs->pc = (unsigned long) ka->_sa_handler;
3050
3051 unlock_user_struct(frame, frame_addr, 1);
3052 return;
3053
3054 give_sigsegv:
3055 unlock_user_struct(frame, frame_addr, 1);
3056 force_sig(TARGET_SIGSEGV);
3057 }
3058
3059 long do_sigreturn(CPUSH4State *regs)
3060 {
3061 struct target_sigframe *frame;
3062 abi_ulong frame_addr;
3063 sigset_t blocked;
3064 target_sigset_t target_set;
3065 target_ulong r0;
3066 int i;
3067 int err = 0;
3068
3069 #if defined(DEBUG_SIGNAL)
3070 fprintf(stderr, "do_sigreturn\n");
3071 #endif
3072 frame_addr = regs->gregs[15];
3073 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3074 goto badframe;
3075
3076 err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
3077 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3078 err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
3079 }
3080
3081 if (err)
3082 goto badframe;
3083
3084 target_to_host_sigset_internal(&blocked, &target_set);
3085 sigprocmask(SIG_SETMASK, &blocked, NULL);
3086
3087 if (restore_sigcontext(regs, &frame->sc, &r0))
3088 goto badframe;
3089
3090 unlock_user_struct(frame, frame_addr, 0);
3091 return r0;
3092
3093 badframe:
3094 unlock_user_struct(frame, frame_addr, 0);
3095 force_sig(TARGET_SIGSEGV);
3096 return 0;
3097 }
3098
3099 long do_rt_sigreturn(CPUSH4State *regs)
3100 {
3101 struct target_rt_sigframe *frame;
3102 abi_ulong frame_addr;
3103 sigset_t blocked;
3104 target_ulong r0;
3105
3106 #if defined(DEBUG_SIGNAL)
3107 fprintf(stderr, "do_rt_sigreturn\n");
3108 #endif
3109 frame_addr = regs->gregs[15];
3110 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3111 goto badframe;
3112
3113 target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask);
3114 sigprocmask(SIG_SETMASK, &blocked, NULL);
3115
3116 if (restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0))
3117 goto badframe;
3118
3119 if (do_sigaltstack(frame_addr +
3120 offsetof(struct target_rt_sigframe, uc.tuc_stack),
3121 0, get_sp_from_cpustate(regs)) == -EFAULT)
3122 goto badframe;
3123
3124 unlock_user_struct(frame, frame_addr, 0);
3125 return r0;
3126
3127 badframe:
3128 unlock_user_struct(frame, frame_addr, 0);
3129 force_sig(TARGET_SIGSEGV);
3130 return 0;
3131 }
3132 #elif defined(TARGET_MICROBLAZE)
3133
3134 struct target_sigcontext {
3135 struct target_pt_regs regs; /* needs to be first */
3136 uint32_t oldmask;
3137 };
3138
3139 struct target_stack_t {
3140 abi_ulong ss_sp;
3141 int ss_flags;
3142 unsigned int ss_size;
3143 };
3144
3145 struct target_ucontext {
3146 abi_ulong tuc_flags;
3147 abi_ulong tuc_link;
3148 struct target_stack_t tuc_stack;
3149 struct target_sigcontext tuc_mcontext;
3150 uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1];
3151 };
3152
3153 /* Signal frames. */
3154 struct target_signal_frame {
3155 struct target_ucontext uc;
3156 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3157 uint32_t tramp[2];
3158 };
3159
3160 struct rt_signal_frame {
3161 siginfo_t info;
3162 struct ucontext uc;
3163 uint32_t tramp[2];
3164 };
3165
3166 static void setup_sigcontext(struct target_sigcontext *sc, CPUMBState *env)
3167 {
3168 __put_user(env->regs[0], &sc->regs.r0);
3169 __put_user(env->regs[1], &sc->regs.r1);
3170 __put_user(env->regs[2], &sc->regs.r2);
3171 __put_user(env->regs[3], &sc->regs.r3);
3172 __put_user(env->regs[4], &sc->regs.r4);
3173 __put_user(env->regs[5], &sc->regs.r5);
3174 __put_user(env->regs[6], &sc->regs.r6);
3175 __put_user(env->regs[7], &sc->regs.r7);
3176 __put_user(env->regs[8], &sc->regs.r8);
3177 __put_user(env->regs[9], &sc->regs.r9);
3178 __put_user(env->regs[10], &sc->regs.r10);
3179 __put_user(env->regs[11], &sc->regs.r11);
3180 __put_user(env->regs[12], &sc->regs.r12);
3181 __put_user(env->regs[13], &sc->regs.r13);
3182 __put_user(env->regs[14], &sc->regs.r14);
3183 __put_user(env->regs[15], &sc->regs.r15);
3184 __put_user(env->regs[16], &sc->regs.r16);
3185 __put_user(env->regs[17], &sc->regs.r17);
3186 __put_user(env->regs[18], &sc->regs.r18);
3187 __put_user(env->regs[19], &sc->regs.r19);
3188 __put_user(env->regs[20], &sc->regs.r20);
3189 __put_user(env->regs[21], &sc->regs.r21);
3190 __put_user(env->regs[22], &sc->regs.r22);
3191 __put_user(env->regs[23], &sc->regs.r23);
3192 __put_user(env->regs[24], &sc->regs.r24);
3193 __put_user(env->regs[25], &sc->regs.r25);
3194 __put_user(env->regs[26], &sc->regs.r26);
3195 __put_user(env->regs[27], &sc->regs.r27);
3196 __put_user(env->regs[28], &sc->regs.r28);
3197 __put_user(env->regs[29], &sc->regs.r29);
3198 __put_user(env->regs[30], &sc->regs.r30);
3199 __put_user(env->regs[31], &sc->regs.r31);
3200 __put_user(env->sregs[SR_PC], &sc->regs.pc);
3201 }
3202
3203 static void restore_sigcontext(struct target_sigcontext *sc, CPUMBState *env)
3204 {
3205 __get_user(env->regs[0], &sc->regs.r0);
3206 __get_user(env->regs[1], &sc->regs.r1);
3207 __get_user(env->regs[2], &sc->regs.r2);
3208 __get_user(env->regs[3], &sc->regs.r3);
3209 __get_user(env->regs[4], &sc->regs.r4);
3210 __get_user(env->regs[5], &sc->regs.r5);
3211 __get_user(env->regs[6], &sc->regs.r6);
3212 __get_user(env->regs[7], &sc->regs.r7);
3213 __get_user(env->regs[8], &sc->regs.r8);
3214 __get_user(env->regs[9], &sc->regs.r9);
3215 __get_user(env->regs[10], &sc->regs.r10);
3216 __get_user(env->regs[11], &sc->regs.r11);
3217 __get_user(env->regs[12], &sc->regs.r12);
3218 __get_user(env->regs[13], &sc->regs.r13);
3219 __get_user(env->regs[14], &sc->regs.r14);
3220 __get_user(env->regs[15], &sc->regs.r15);
3221 __get_user(env->regs[16], &sc->regs.r16);
3222 __get_user(env->regs[17], &sc->regs.r17);
3223 __get_user(env->regs[18], &sc->regs.r18);
3224 __get_user(env->regs[19], &sc->regs.r19);
3225 __get_user(env->regs[20], &sc->regs.r20);
3226 __get_user(env->regs[21], &sc->regs.r21);
3227 __get_user(env->regs[22], &sc->regs.r22);
3228 __get_user(env->regs[23], &sc->regs.r23);
3229 __get_user(env->regs[24], &sc->regs.r24);
3230 __get_user(env->regs[25], &sc->regs.r25);
3231 __get_user(env->regs[26], &sc->regs.r26);
3232 __get_user(env->regs[27], &sc->regs.r27);
3233 __get_user(env->regs[28], &sc->regs.r28);
3234 __get_user(env->regs[29], &sc->regs.r29);
3235 __get_user(env->regs[30], &sc->regs.r30);
3236 __get_user(env->regs[31], &sc->regs.r31);
3237 __get_user(env->sregs[SR_PC], &sc->regs.pc);
3238 }
3239
3240 static abi_ulong get_sigframe(struct target_sigaction *ka,
3241 CPUMBState *env, int frame_size)
3242 {
3243 abi_ulong sp = env->regs[1];
3244
3245 if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp))
3246 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3247
3248 return ((sp - frame_size) & -8UL);
3249 }
3250
3251 static void setup_frame(int sig, struct target_sigaction *ka,
3252 target_sigset_t *set, CPUMBState *env)
3253 {
3254 struct target_signal_frame *frame;
3255 abi_ulong frame_addr;
3256 int err = 0;
3257 int i;
3258
3259 frame_addr = get_sigframe(ka, env, sizeof *frame);
3260 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3261 goto badframe;
3262
3263 /* Save the mask. */
3264 err |= __put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask);
3265 if (err)
3266 goto badframe;
3267
3268 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3269 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
3270 goto badframe;
3271 }
3272
3273 setup_sigcontext(&frame->uc.tuc_mcontext, env);
3274
3275 /* Set up to return from userspace. If provided, use a stub
3276 already in userspace. */
3277 /* minus 8 is offset to cater for "rtsd r15,8" offset */
3278 if (ka->sa_flags & TARGET_SA_RESTORER) {
3279 env->regs[15] = ((unsigned long)ka->sa_restorer)-8;
3280 } else {
3281 uint32_t t;
3282 /* Note, these encodings are _big endian_! */
3283 /* addi r12, r0, __NR_sigreturn */
3284 t = 0x31800000UL | TARGET_NR_sigreturn;
3285 err |= __put_user(t, frame->tramp + 0);
3286 /* brki r14, 0x8 */
3287 t = 0xb9cc0008UL;
3288 err |= __put_user(t, frame->tramp + 1);
3289
3290 /* Return from sighandler will jump to the tramp.
3291 Negative 8 offset because return is rtsd r15, 8 */
3292 env->regs[15] = ((unsigned long)frame->tramp) - 8;
3293 }
3294
3295 if (err)
3296 goto badframe;
3297
3298 /* Set up registers for signal handler */
3299 env->regs[1] = frame_addr;
3300 /* Signal handler args: */
3301 env->regs[5] = sig; /* Arg 0: signum */
3302 env->regs[6] = 0;
3303 /* arg 1: sigcontext */
3304 env->regs[7] = frame_addr += offsetof(typeof(*frame), uc);
3305
3306 /* Offset of 4 to handle microblaze rtid r14, 0 */
3307 env->sregs[SR_PC] = (unsigned long)ka->_sa_handler;
3308
3309 unlock_user_struct(frame, frame_addr, 1);
3310 return;
3311 badframe:
3312 unlock_user_struct(frame, frame_addr, 1);
3313 force_sig(TARGET_SIGSEGV);
3314 }
3315
3316 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3317 target_siginfo_t *info,
3318 target_sigset_t *set, CPUMBState *env)
3319 {
3320 fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n");
3321 }
3322
3323 long do_sigreturn(CPUMBState *env)
3324 {
3325 struct target_signal_frame *frame;
3326 abi_ulong frame_addr;
3327 target_sigset_t target_set;
3328 sigset_t set;
3329 int i;
3330
3331 frame_addr = env->regs[R_SP];
3332 /* Make sure the guest isn't playing games. */
3333 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3334 goto badframe;
3335
3336 /* Restore blocked signals */
3337 if (__get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask))
3338 goto badframe;
3339 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3340 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3341 goto badframe;
3342 }
3343 target_to_host_sigset_internal(&set, &target_set);
3344 sigprocmask(SIG_SETMASK, &set, NULL);
3345
3346 restore_sigcontext(&frame->uc.tuc_mcontext, env);
3347 /* We got here through a sigreturn syscall, our path back is via an
3348 rtb insn so setup r14 for that. */
3349 env->regs[14] = env->sregs[SR_PC];
3350
3351 unlock_user_struct(frame, frame_addr, 0);
3352 return env->regs[10];
3353 badframe:
3354 unlock_user_struct(frame, frame_addr, 0);
3355 force_sig(TARGET_SIGSEGV);
3356 }
3357
3358 long do_rt_sigreturn(CPUMBState *env)
3359 {
3360 fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n");
3361 return -TARGET_ENOSYS;
3362 }
3363
3364 #elif defined(TARGET_CRIS)
3365
3366 struct target_sigcontext {
3367 struct target_pt_regs regs; /* needs to be first */
3368 uint32_t oldmask;
3369 uint32_t usp; /* usp before stacking this gunk on it */
3370 };
3371
3372 /* Signal frames. */
3373 struct target_signal_frame {
3374 struct target_sigcontext sc;
3375 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3376 uint8_t retcode[8]; /* Trampoline code. */
3377 };
3378
3379 struct rt_signal_frame {
3380 siginfo_t *pinfo;
3381 void *puc;
3382 siginfo_t info;
3383 struct ucontext uc;
3384 uint8_t retcode[8]; /* Trampoline code. */
3385 };
3386
3387 static void setup_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
3388 {
3389 __put_user(env->regs[0], &sc->regs.r0);
3390 __put_user(env->regs[1], &sc->regs.r1);
3391 __put_user(env->regs[2], &sc->regs.r2);
3392 __put_user(env->regs[3], &sc->regs.r3);
3393 __put_user(env->regs[4], &sc->regs.r4);
3394 __put_user(env->regs[5], &sc->regs.r5);
3395 __put_user(env->regs[6], &sc->regs.r6);
3396 __put_user(env->regs[7], &sc->regs.r7);
3397 __put_user(env->regs[8], &sc->regs.r8);
3398 __put_user(env->regs[9], &sc->regs.r9);
3399 __put_user(env->regs[10], &sc->regs.r10);
3400 __put_user(env->regs[11], &sc->regs.r11);
3401 __put_user(env->regs[12], &sc->regs.r12);
3402 __put_user(env->regs[13], &sc->regs.r13);
3403 __put_user(env->regs[14], &sc->usp);
3404 __put_user(env->regs[15], &sc->regs.acr);
3405 __put_user(env->pregs[PR_MOF], &sc->regs.mof);
3406 __put_user(env->pregs[PR_SRP], &sc->regs.srp);
3407 __put_user(env->pc, &sc->regs.erp);
3408 }
3409
3410 static void restore_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
3411 {
3412 __get_user(env->regs[0], &sc->regs.r0);
3413 __get_user(env->regs[1], &sc->regs.r1);
3414 __get_user(env->regs[2], &sc->regs.r2);
3415 __get_user(env->regs[3], &sc->regs.r3);
3416 __get_user(env->regs[4], &sc->regs.r4);
3417 __get_user(env->regs[5], &sc->regs.r5);
3418 __get_user(env->regs[6], &sc->regs.r6);
3419 __get_user(env->regs[7], &sc->regs.r7);
3420 __get_user(env->regs[8], &sc->regs.r8);
3421 __get_user(env->regs[9], &sc->regs.r9);
3422 __get_user(env->regs[10], &sc->regs.r10);
3423 __get_user(env->regs[11], &sc->regs.r11);
3424 __get_user(env->regs[12], &sc->regs.r12);
3425 __get_user(env->regs[13], &sc->regs.r13);
3426 __get_user(env->regs[14], &sc->usp);
3427 __get_user(env->regs[15], &sc->regs.acr);
3428 __get_user(env->pregs[PR_MOF], &sc->regs.mof);
3429 __get_user(env->pregs[PR_SRP], &sc->regs.srp);
3430 __get_user(env->pc, &sc->regs.erp);
3431 }
3432
3433 static abi_ulong get_sigframe(CPUCRISState *env, int framesize)
3434 {
3435 abi_ulong sp;
3436 /* Align the stack downwards to 4. */
3437 sp = (env->regs[R_SP] & ~3);
3438 return sp - framesize;
3439 }
3440
3441 static void setup_frame(int sig, struct target_sigaction *ka,
3442 target_sigset_t *set, CPUCRISState *env)
3443 {
3444 struct target_signal_frame *frame;
3445 abi_ulong frame_addr;
3446 int err = 0;
3447 int i;
3448
3449 frame_addr = get_sigframe(env, sizeof *frame);
3450 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3451 goto badframe;
3452
3453 /*
3454 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
3455 * use this trampoline anymore but it sets it up for GDB.
3456 * In QEMU, using the trampoline simplifies things a bit so we use it.
3457 *
3458 * This is movu.w __NR_sigreturn, r9; break 13;
3459 */
3460 err |= __put_user(0x9c5f, frame->retcode+0);
3461 err |= __put_user(TARGET_NR_sigreturn,
3462 frame->retcode+2);
3463 err |= __put_user(0xe93d, frame->retcode+4);
3464
3465 /* Save the mask. */
3466 err |= __put_user(set->sig[0], &frame->sc.oldmask);
3467 if (err)
3468 goto badframe;
3469
3470 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3471 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
3472 goto badframe;
3473 }
3474
3475 setup_sigcontext(&frame->sc, env);
3476
3477 /* Move the stack and setup the arguments for the handler. */
3478 env->regs[R_SP] = frame_addr;
3479 env->regs[10] = sig;
3480 env->pc = (unsigned long) ka->_sa_handler;
3481 /* Link SRP so the guest returns through the trampoline. */
3482 env->pregs[PR_SRP] = frame_addr + offsetof(typeof(*frame), retcode);
3483
3484 unlock_user_struct(frame, frame_addr, 1);
3485 return;
3486 badframe:
3487 unlock_user_struct(frame, frame_addr, 1);
3488 force_sig(TARGET_SIGSEGV);
3489 }
3490
3491 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3492 target_siginfo_t *info,
3493 target_sigset_t *set, CPUCRISState *env)
3494 {
3495 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
3496 }
3497
3498 long do_sigreturn(CPUCRISState *env)
3499 {
3500 struct target_signal_frame *frame;
3501 abi_ulong frame_addr;
3502 target_sigset_t target_set;
3503 sigset_t set;
3504 int i;
3505
3506 frame_addr = env->regs[R_SP];
3507 /* Make sure the guest isn't playing games. */
3508 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3509 goto badframe;
3510
3511 /* Restore blocked signals */
3512 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
3513 goto badframe;
3514 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3515 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3516 goto badframe;
3517 }
3518 target_to_host_sigset_internal(&set, &target_set);
3519 sigprocmask(SIG_SETMASK, &set, NULL);
3520
3521 restore_sigcontext(&frame->sc, env);
3522 unlock_user_struct(frame, frame_addr, 0);
3523 return env->regs[10];
3524 badframe:
3525 unlock_user_struct(frame, frame_addr, 0);
3526 force_sig(TARGET_SIGSEGV);
3527 }
3528
3529 long do_rt_sigreturn(CPUCRISState *env)
3530 {
3531 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
3532 return -TARGET_ENOSYS;
3533 }
3534
3535 #elif defined(TARGET_OPENRISC)
3536
3537 struct target_sigcontext {
3538 struct target_pt_regs regs;
3539 abi_ulong oldmask;
3540 abi_ulong usp;
3541 };
3542
3543 struct target_ucontext {
3544 abi_ulong tuc_flags;
3545 abi_ulong tuc_link;
3546 target_stack_t tuc_stack;
3547 struct target_sigcontext tuc_mcontext;
3548 target_sigset_t tuc_sigmask; /* mask last for extensibility */
3549 };
3550
3551 struct target_rt_sigframe {
3552 abi_ulong pinfo;
3553 uint64_t puc;
3554 struct target_siginfo info;
3555 struct target_sigcontext sc;
3556 struct target_ucontext uc;
3557 unsigned char retcode[16]; /* trampoline code */
3558 };
3559
3560 /* This is the asm-generic/ucontext.h version */
3561 #if 0
3562 static int restore_sigcontext(CPUOpenRISCState *regs,
3563 struct target_sigcontext *sc)
3564 {
3565 unsigned int err = 0;
3566 unsigned long old_usp;
3567
3568 /* Alwys make any pending restarted system call return -EINTR */
3569 current_thread_info()->restart_block.fn = do_no_restart_syscall;
3570
3571 /* restore the regs from &sc->regs (same as sc, since regs is first)
3572 * (sc is already checked for VERIFY_READ since the sigframe was
3573 * checked in sys_sigreturn previously)
3574 */
3575
3576 if (copy_from_user(regs, &sc, sizeof(struct target_pt_regs))) {
3577 goto badframe;
3578 }
3579
3580 /* make sure the U-flag is set so user-mode cannot fool us */
3581
3582 regs->sr &= ~SR_SM;
3583
3584 /* restore the old USP as it was before we stacked the sc etc.
3585 * (we cannot just pop the sigcontext since we aligned the sp and
3586 * stuff after pushing it)
3587 */
3588
3589 err |= __get_user(old_usp, &sc->usp);
3590 phx_signal("old_usp 0x%lx", old_usp);
3591
3592 __PHX__ REALLY /* ??? */
3593 wrusp(old_usp);
3594 regs->gpr[1] = old_usp;
3595
3596 /* TODO: the other ports use regs->orig_XX to disable syscall checks
3597 * after this completes, but we don't use that mechanism. maybe we can
3598 * use it now ?
3599 */
3600
3601 return err;
3602
3603 badframe:
3604 return 1;
3605 }
3606 #endif
3607
3608 /* Set up a signal frame. */
3609
3610 static int setup_sigcontext(struct target_sigcontext *sc,
3611 CPUOpenRISCState *regs,
3612 unsigned long mask)
3613 {
3614 int err = 0;
3615 unsigned long usp = regs->gpr[1];
3616
3617 /* copy the regs. they are first in sc so we can use sc directly */
3618
3619 /*err |= copy_to_user(&sc, regs, sizeof(struct target_pt_regs));*/
3620
3621 /* Set the frametype to CRIS_FRAME_NORMAL for the execution of
3622 the signal handler. The frametype will be restored to its previous
3623 value in restore_sigcontext. */
3624 /*regs->frametype = CRIS_FRAME_NORMAL;*/
3625
3626 /* then some other stuff */
3627 err |= __put_user(mask, &sc->oldmask);
3628 err |= __put_user(usp, &sc->usp); return err;
3629 }
3630
3631 static inline unsigned long align_sigframe(unsigned long sp)
3632 {
3633 unsigned long i;
3634 i = sp & ~3UL;
3635 return i;
3636 }
3637
3638 static inline abi_ulong get_sigframe(struct target_sigaction *ka,
3639 CPUOpenRISCState *regs,
3640 size_t frame_size)
3641 {
3642 unsigned long sp = regs->gpr[1];
3643 int onsigstack = on_sig_stack(sp);
3644
3645 /* redzone */
3646 /* This is the X/Open sanctioned signal stack switching. */
3647 if ((ka->sa_flags & SA_ONSTACK) != 0 && !onsigstack) {
3648 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3649 }
3650
3651 sp = align_sigframe(sp - frame_size);
3652
3653 /*
3654 * If we are on the alternate signal stack and would overflow it, don't.
3655 * Return an always-bogus address instead so we will die with SIGSEGV.
3656 */
3657
3658 if (onsigstack && !likely(on_sig_stack(sp))) {
3659 return -1L;
3660 }
3661
3662 return sp;
3663 }
3664
3665 static void setup_frame(int sig, struct target_sigaction *ka,
3666 target_sigset_t *set, CPUOpenRISCState *env)
3667 {
3668 qemu_log("Not implement.\n");
3669 }
3670
3671 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3672 target_siginfo_t *info,
3673 target_sigset_t *set, CPUOpenRISCState *env)
3674 {
3675 int err = 0;
3676 abi_ulong frame_addr;
3677 unsigned long return_ip;
3678 struct target_rt_sigframe *frame;
3679 abi_ulong info_addr, uc_addr;
3680
3681 frame_addr = get_sigframe(ka, env, sizeof *frame);
3682
3683 frame_addr = get_sigframe(ka, env, sizeof(*frame));
3684 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3685 goto give_sigsegv;
3686 }
3687
3688 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
3689 err |= __put_user(info_addr, &frame->pinfo);
3690 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
3691 err |= __put_user(uc_addr, &frame->puc);
3692
3693 if (ka->sa_flags & SA_SIGINFO) {
3694 err |= copy_siginfo_to_user(&frame->info, info);
3695 }
3696 if (err) {
3697 goto give_sigsegv;
3698 }
3699
3700 /*err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));*/
3701 err |= __put_user(0, &frame->uc.tuc_flags);
3702 err |= __put_user(0, &frame->uc.tuc_link);
3703 err |= __put_user(target_sigaltstack_used.ss_sp,
3704 &frame->uc.tuc_stack.ss_sp);
3705 err |= __put_user(sas_ss_flags(env->gpr[1]), &frame->uc.tuc_stack.ss_flags);
3706 err |= __put_user(target_sigaltstack_used.ss_size,
3707 &frame->uc.tuc_stack.ss_size);
3708 err |= setup_sigcontext(&frame->sc, env, set->sig[0]);
3709
3710 /*err |= copy_to_user(frame->uc.tuc_sigmask, set, sizeof(*set));*/
3711
3712 if (err) {
3713 goto give_sigsegv;
3714 }
3715
3716 /* trampoline - the desired return ip is the retcode itself */
3717 return_ip = (unsigned long)&frame->retcode;
3718 /* This is l.ori r11,r0,__NR_sigreturn, l.sys 1 */
3719 err |= __put_user(0xa960, (short *)(frame->retcode + 0));
3720 err |= __put_user(TARGET_NR_rt_sigreturn, (short *)(frame->retcode + 2));
3721 err |= __put_user(0x20000001, (unsigned long *)(frame->retcode + 4));
3722 err |= __put_user(0x15000000, (unsigned long *)(frame->retcode + 8));
3723
3724 if (err) {
3725 goto give_sigsegv;
3726 }
3727
3728 /* TODO what is the current->exec_domain stuff and invmap ? */
3729
3730 /* Set up registers for signal handler */
3731 env->pc = (unsigned long)ka->_sa_handler; /* what we enter NOW */
3732 env->gpr[9] = (unsigned long)return_ip; /* what we enter LATER */
3733 env->gpr[3] = (unsigned long)sig; /* arg 1: signo */
3734 env->gpr[4] = (unsigned long)&frame->info; /* arg 2: (siginfo_t*) */
3735 env->gpr[5] = (unsigned long)&frame->uc; /* arg 3: ucontext */
3736
3737 /* actually move the usp to reflect the stacked frame */
3738 env->gpr[1] = (unsigned long)frame;
3739
3740 return;
3741
3742 give_sigsegv:
3743 unlock_user_struct(frame, frame_addr, 1);
3744 if (sig == TARGET_SIGSEGV) {
3745 ka->_sa_handler = TARGET_SIG_DFL;
3746 }
3747 force_sig(TARGET_SIGSEGV);
3748 }
3749
3750 long do_sigreturn(CPUOpenRISCState *env)
3751 {
3752
3753 qemu_log("do_sigreturn: not implemented\n");
3754 return -TARGET_ENOSYS;
3755 }
3756
3757 long do_rt_sigreturn(CPUOpenRISCState *env)
3758 {
3759 qemu_log("do_rt_sigreturn: not implemented\n");
3760 return -TARGET_ENOSYS;
3761 }
3762 /* TARGET_OPENRISC */
3763
3764 #elif defined(TARGET_S390X)
3765
3766 #define __NUM_GPRS 16
3767 #define __NUM_FPRS 16
3768 #define __NUM_ACRS 16
3769
3770 #define S390_SYSCALL_SIZE 2
3771 #define __SIGNAL_FRAMESIZE 160 /* FIXME: 31-bit mode -> 96 */
3772
3773 #define _SIGCONTEXT_NSIG 64
3774 #define _SIGCONTEXT_NSIG_BPW 64 /* FIXME: 31-bit mode -> 32 */
3775 #define _SIGCONTEXT_NSIG_WORDS (_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW)
3776 #define _SIGMASK_COPY_SIZE (sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS)
3777 #define PSW_ADDR_AMODE 0x0000000000000000UL /* 0x80000000UL for 31-bit */
3778 #define S390_SYSCALL_OPCODE ((uint16_t)0x0a00)
3779
3780 typedef struct {
3781 target_psw_t psw;
3782 target_ulong gprs[__NUM_GPRS];
3783 unsigned int acrs[__NUM_ACRS];
3784 } target_s390_regs_common;
3785
3786 typedef struct {
3787 unsigned int fpc;
3788 double fprs[__NUM_FPRS];
3789 } target_s390_fp_regs;
3790
3791 typedef struct {
3792 target_s390_regs_common regs;
3793 target_s390_fp_regs fpregs;
3794 } target_sigregs;
3795
3796 struct target_sigcontext {
3797 target_ulong oldmask[_SIGCONTEXT_NSIG_WORDS];
3798 target_sigregs *sregs;
3799 };
3800
3801 typedef struct {
3802 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
3803 struct target_sigcontext sc;
3804 target_sigregs sregs;
3805 int signo;
3806 uint8_t retcode[S390_SYSCALL_SIZE];
3807 } sigframe;
3808
3809 struct target_ucontext {
3810 target_ulong tuc_flags;
3811 struct target_ucontext *tuc_link;
3812 target_stack_t tuc_stack;
3813 target_sigregs tuc_mcontext;
3814 target_sigset_t tuc_sigmask; /* mask last for extensibility */
3815 };
3816
3817 typedef struct {
3818 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
3819 uint8_t retcode[S390_SYSCALL_SIZE];
3820 struct target_siginfo info;
3821 struct target_ucontext uc;
3822 } rt_sigframe;
3823
3824 static inline abi_ulong
3825 get_sigframe(struct target_sigaction *ka, CPUS390XState *env, size_t frame_size)
3826 {
3827 abi_ulong sp;
3828
3829 /* Default to using normal stack */
3830 sp = env->regs[15];
3831
3832 /* This is the X/Open sanctioned signal stack switching. */
3833 if (ka->sa_flags & TARGET_SA_ONSTACK) {
3834 if (!sas_ss_flags(sp)) {
3835 sp = target_sigaltstack_used.ss_sp +
3836 target_sigaltstack_used.ss_size;
3837 }
3838 }
3839
3840 /* This is the legacy signal stack switching. */
3841 else if (/* FIXME !user_mode(regs) */ 0 &&
3842 !(ka->sa_flags & TARGET_SA_RESTORER) &&
3843 ka->sa_restorer) {
3844 sp = (abi_ulong) ka->sa_restorer;
3845 }
3846
3847 return (sp - frame_size) & -8ul;
3848 }
3849
3850 static void save_sigregs(CPUS390XState *env, target_sigregs *sregs)
3851 {
3852 int i;
3853 //save_access_regs(current->thread.acrs); FIXME
3854
3855 /* Copy a 'clean' PSW mask to the user to avoid leaking
3856 information about whether PER is currently on. */
3857 __put_user(env->psw.mask, &sregs->regs.psw.mask);
3858 __put_user(env->psw.addr, &sregs->regs.psw.addr);
3859 for (i = 0; i < 16; i++) {
3860 __put_user(env->regs[i], &sregs->regs.gprs[i]);
3861 }
3862 for (i = 0; i < 16; i++) {
3863 __put_user(env->aregs[i], &sregs->regs.acrs[i]);
3864 }
3865 /*
3866 * We have to store the fp registers to current->thread.fp_regs
3867 * to merge them with the emulated registers.
3868 */
3869 //save_fp_regs(&current->thread.fp_regs); FIXME
3870 for (i = 0; i < 16; i++) {
3871 __put_user(env->fregs[i].ll, &sregs->fpregs.fprs[i]);
3872 }
3873 }
3874
3875 static void setup_frame(int sig, struct target_sigaction *ka,
3876 target_sigset_t *set, CPUS390XState *env)
3877 {
3878 sigframe *frame;
3879 abi_ulong frame_addr;
3880
3881 frame_addr = get_sigframe(ka, env, sizeof(*frame));
3882 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
3883 (unsigned long long)frame_addr);
3884 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3885 goto give_sigsegv;
3886 }
3887
3888 qemu_log("%s: 1\n", __FUNCTION__);
3889 if (__put_user(set->sig[0], &frame->sc.oldmask[0])) {
3890 goto give_sigsegv;
3891 }
3892
3893 save_sigregs(env, &frame->sregs);
3894
3895 __put_user((abi_ulong)(unsigned long)&frame->sregs,
3896 (abi_ulong *)&frame->sc.sregs);
3897
3898 /* Set up to return from userspace. If provided, use a stub
3899 already in userspace. */
3900 if (ka->sa_flags & TARGET_SA_RESTORER) {
3901 env->regs[14] = (unsigned long)
3902 ka->sa_restorer | PSW_ADDR_AMODE;
3903 } else {
3904 env->regs[14] = (unsigned long)
3905 frame->retcode | PSW_ADDR_AMODE;
3906 if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn,
3907 (uint16_t *)(frame->retcode)))
3908 goto give_sigsegv;
3909 }
3910
3911 /* Set up backchain. */
3912 if (__put_user(env->regs[15], (abi_ulong *) frame)) {
3913 goto give_sigsegv;
3914 }
3915
3916 /* Set up registers for signal handler */
3917 env->regs[15] = frame_addr;
3918 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
3919
3920 env->regs[2] = sig; //map_signal(sig);
3921 env->regs[3] = frame_addr += offsetof(typeof(*frame), sc);
3922
3923 /* We forgot to include these in the sigcontext.
3924 To avoid breaking binary compatibility, they are passed as args. */
3925 env->regs[4] = 0; // FIXME: no clue... current->thread.trap_no;
3926 env->regs[5] = 0; // FIXME: no clue... current->thread.prot_addr;
3927
3928 /* Place signal number on stack to allow backtrace from handler. */
3929 if (__put_user(env->regs[2], (int *) &frame->signo)) {
3930 goto give_sigsegv;
3931 }
3932 unlock_user_struct(frame, frame_addr, 1);
3933 return;
3934
3935 give_sigsegv:
3936 qemu_log("%s: give_sigsegv\n", __FUNCTION__);
3937 unlock_user_struct(frame, frame_addr, 1);
3938 force_sig(TARGET_SIGSEGV);
3939 }
3940
3941 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3942 target_siginfo_t *info,
3943 target_sigset_t *set, CPUS390XState *env)
3944 {
3945 int i;
3946 rt_sigframe *frame;
3947 abi_ulong frame_addr;
3948
3949 frame_addr = get_sigframe(ka, env, sizeof *frame);
3950 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
3951 (unsigned long long)frame_addr);
3952 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3953 goto give_sigsegv;
3954 }
3955
3956 qemu_log("%s: 1\n", __FUNCTION__);
3957 if (copy_siginfo_to_user(&frame->info, info)) {
3958 goto give_sigsegv;
3959 }
3960
3961 /* Create the ucontext. */
3962 __put_user(0, &frame->uc.tuc_flags);
3963 __put_user((abi_ulong)0, (abi_ulong *)&frame->uc.tuc_link);
3964 __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
3965 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
3966 &frame->uc.tuc_stack.ss_flags);
3967 __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size);
3968 save_sigregs(env, &frame->uc.tuc_mcontext);
3969 for (i = 0; i < TARGET_NSIG_WORDS; i++) {
3970 __put_user((abi_ulong)set->sig[i],
3971 (abi_ulong *)&frame->uc.tuc_sigmask.sig[i]);
3972 }
3973
3974 /* Set up to return from userspace. If provided, use a stub
3975 already in userspace. */
3976 if (ka->sa_flags & TARGET_SA_RESTORER) {
3977 env->regs[14] = (unsigned long) ka->sa_restorer | PSW_ADDR_AMODE;
3978 } else {
3979 env->regs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE;
3980 if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn,
3981 (uint16_t *)(frame->retcode))) {
3982 goto give_sigsegv;
3983 }
3984 }
3985
3986 /* Set up backchain. */
3987 if (__put_user(env->regs[15], (abi_ulong *) frame)) {
3988 goto give_sigsegv;
3989 }
3990
3991 /* Set up registers for signal handler */
3992 env->regs[15] = frame_addr;
3993 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
3994
3995 env->regs[2] = sig; //map_signal(sig);
3996 env->regs[3] = frame_addr + offsetof(typeof(*frame), info);
3997 env->regs[4] = frame_addr + offsetof(typeof(*frame), uc);
3998 return;
3999
4000 give_sigsegv:
4001 qemu_log("%s: give_sigsegv\n", __FUNCTION__);
4002 unlock_user_struct(frame, frame_addr, 1);
4003 force_sig(TARGET_SIGSEGV);
4004 }
4005
4006 static int
4007 restore_sigregs(CPUS390XState *env, target_sigregs *sc)
4008 {
4009 int err = 0;
4010 int i;
4011
4012 for (i = 0; i < 16; i++) {
4013 err |= __get_user(env->regs[i], &sc->regs.gprs[i]);
4014 }
4015
4016 err |= __get_user(env->psw.mask, &sc->regs.psw.mask);
4017 qemu_log("%s: sc->regs.psw.addr 0x%llx env->psw.addr 0x%llx\n",
4018 __FUNCTION__, (unsigned long long)sc->regs.psw.addr,
4019 (unsigned long long)env->psw.addr);
4020 err |= __get_user(env->psw.addr, &sc->regs.psw.addr);
4021 /* FIXME: 31-bit -> | PSW_ADDR_AMODE */
4022
4023 for (i = 0; i < 16; i++) {
4024 err |= __get_user(env->aregs[i], &sc->regs.acrs[i]);
4025 }
4026 for (i = 0; i < 16; i++) {
4027 err |= __get_user(env->fregs[i].ll, &sc->fpregs.fprs[i]);
4028 }
4029
4030 return err;
4031 }
4032
4033 long do_sigreturn(CPUS390XState *env)
4034 {
4035 sigframe *frame;
4036 abi_ulong frame_addr = env->regs[15];
4037 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
4038 (unsigned long long)frame_addr);
4039 target_sigset_t target_set;
4040 sigset_t set;
4041
4042 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
4043 goto badframe;
4044 }
4045 if (__get_user(target_set.sig[0], &frame->sc.oldmask[0])) {
4046 goto badframe;
4047 }
4048
4049 target_to_host_sigset_internal(&set, &target_set);
4050 sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */
4051
4052 if (restore_sigregs(env, &frame->sregs)) {
4053 goto badframe;
4054 }
4055
4056 unlock_user_struct(frame, frame_addr, 0);
4057 return env->regs[2];
4058
4059 badframe:
4060 unlock_user_struct(frame, frame_addr, 0);
4061 force_sig(TARGET_SIGSEGV);
4062 return 0;
4063 }
4064
4065 long do_rt_sigreturn(CPUS390XState *env)
4066 {
4067 rt_sigframe *frame;
4068 abi_ulong frame_addr = env->regs[15];
4069 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
4070 (unsigned long long)frame_addr);
4071 sigset_t set;
4072
4073 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
4074 goto badframe;
4075 }
4076 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
4077
4078 sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */
4079
4080 if (restore_sigregs(env, &frame->uc.tuc_mcontext)) {
4081 goto badframe;
4082 }
4083
4084 if (do_sigaltstack(frame_addr + offsetof(rt_sigframe, uc.tuc_stack), 0,
4085 get_sp_from_cpustate(env)) == -EFAULT) {
4086 goto badframe;
4087 }
4088 unlock_user_struct(frame, frame_addr, 0);
4089 return env->regs[2];
4090
4091 badframe:
4092 unlock_user_struct(frame, frame_addr, 0);
4093 force_sig(TARGET_SIGSEGV);
4094 return 0;
4095 }
4096
4097 #elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
4098
4099 /* FIXME: Many of the structures are defined for both PPC and PPC64, but
4100 the signal handling is different enough that we haven't implemented
4101 support for PPC64 yet. Hence the restriction above.
4102
4103 There are various #if'd blocks for code for TARGET_PPC64. These
4104 blocks should go away so that we can successfully run 32-bit and
4105 64-bit binaries on a QEMU configured for PPC64. */
4106
4107 /* Size of dummy stack frame allocated when calling signal handler.
4108 See arch/powerpc/include/asm/ptrace.h. */
4109 #if defined(TARGET_PPC64)
4110 #define SIGNAL_FRAMESIZE 128
4111 #else
4112 #define SIGNAL_FRAMESIZE 64
4113 #endif
4114
4115 /* See arch/powerpc/include/asm/sigcontext.h. */
4116 struct target_sigcontext {
4117 target_ulong _unused[4];
4118 int32_t signal;
4119 #if defined(TARGET_PPC64)
4120 int32_t pad0;
4121 #endif
4122 target_ulong handler;
4123 target_ulong oldmask;
4124 target_ulong regs; /* struct pt_regs __user * */
4125 /* TODO: PPC64 includes extra bits here. */
4126 };
4127
4128 /* Indices for target_mcontext.mc_gregs, below.
4129 See arch/powerpc/include/asm/ptrace.h for details. */
4130 enum {
4131 TARGET_PT_R0 = 0,
4132 TARGET_PT_R1 = 1,
4133 TARGET_PT_R2 = 2,
4134 TARGET_PT_R3 = 3,
4135 TARGET_PT_R4 = 4,
4136 TARGET_PT_R5 = 5,
4137 TARGET_PT_R6 = 6,
4138 TARGET_PT_R7 = 7,
4139 TARGET_PT_R8 = 8,
4140 TARGET_PT_R9 = 9,
4141 TARGET_PT_R10 = 10,
4142 TARGET_PT_R11 = 11,
4143 TARGET_PT_R12 = 12,
4144 TARGET_PT_R13 = 13,
4145 TARGET_PT_R14 = 14,
4146 TARGET_PT_R15 = 15,
4147 TARGET_PT_R16 = 16,
4148 TARGET_PT_R17 = 17,
4149 TARGET_PT_R18 = 18,
4150 TARGET_PT_R19 = 19,
4151 TARGET_PT_R20 = 20,
4152 TARGET_PT_R21 = 21,
4153 TARGET_PT_R22 = 22,
4154 TARGET_PT_R23 = 23,
4155 TARGET_PT_R24 = 24,
4156 TARGET_PT_R25 = 25,
4157 TARGET_PT_R26 = 26,
4158 TARGET_PT_R27 = 27,
4159 TARGET_PT_R28 = 28,
4160 TARGET_PT_R29 = 29,
4161 TARGET_PT_R30 = 30,
4162 TARGET_PT_R31 = 31,
4163 TARGET_PT_NIP = 32,
4164 TARGET_PT_MSR = 33,
4165 TARGET_PT_ORIG_R3 = 34,
4166 TARGET_PT_CTR = 35,
4167 TARGET_PT_LNK = 36,
4168 TARGET_PT_XER = 37,
4169 TARGET_PT_CCR = 38,
4170 /* Yes, there are two registers with #39. One is 64-bit only. */
4171 TARGET_PT_MQ = 39,
4172 TARGET_PT_SOFTE = 39,
4173 TARGET_PT_TRAP = 40,
4174 TARGET_PT_DAR = 41,
4175 TARGET_PT_DSISR = 42,
4176 TARGET_PT_RESULT = 43,
4177 TARGET_PT_REGS_COUNT = 44
4178 };
4179
4180 /* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC;
4181 on 64-bit PPC, sigcontext and mcontext are one and the same. */
4182 struct target_mcontext {
4183 target_ulong mc_gregs[48];
4184 /* Includes fpscr. */
4185 uint64_t mc_fregs[33];
4186 target_ulong mc_pad[2];
4187 /* We need to handle Altivec and SPE at the same time, which no
4188 kernel needs to do. Fortunately, the kernel defines this bit to
4189 be Altivec-register-large all the time, rather than trying to
4190 twiddle it based on the specific platform. */
4191 union {
4192 /* SPE vector registers. One extra for SPEFSCR. */
4193 uint32_t spe[33];
4194 /* Altivec vector registers. The packing of VSCR and VRSAVE
4195 varies depending on whether we're PPC64 or not: PPC64 splits
4196 them apart; PPC32 stuffs them together. */
4197 #if defined(TARGET_PPC64)
4198 #define QEMU_NVRREG 34
4199 #else
4200 #define QEMU_NVRREG 33
4201 #endif
4202 ppc_avr_t altivec[QEMU_NVRREG];
4203 #undef QEMU_NVRREG
4204 } mc_vregs __attribute__((__aligned__(16)));
4205 };
4206
4207 struct target_ucontext {
4208 target_ulong tuc_flags;
4209 target_ulong tuc_link; /* struct ucontext __user * */
4210 struct target_sigaltstack tuc_stack;
4211 #if !defined(TARGET_PPC64)
4212 int32_t tuc_pad[7];
4213 target_ulong tuc_regs; /* struct mcontext __user *
4214 points to uc_mcontext field */
4215 #endif
4216 target_sigset_t tuc_sigmask;
4217 #if defined(TARGET_PPC64)
4218 target_sigset_t unused[15]; /* Allow for uc_sigmask growth */
4219 struct target_sigcontext tuc_mcontext;
4220 #else
4221 int32_t tuc_maskext[30];
4222 int32_t tuc_pad2[3];
4223 struct target_mcontext tuc_mcontext;
4224 #endif
4225 };
4226
4227 /* See arch/powerpc/kernel/signal_32.c. */
4228 struct target_sigframe {
4229 struct target_sigcontext sctx;
4230 struct target_mcontext mctx;
4231 int32_t abigap[56];
4232 };
4233
4234 struct target_rt_sigframe {
4235 struct target_siginfo info;
4236 struct target_ucontext uc;
4237 int32_t abigap[56];
4238 };
4239
4240 /* We use the mc_pad field for the signal return trampoline. */
4241 #define tramp mc_pad
4242
4243 /* See arch/powerpc/kernel/signal.c. */
4244 static target_ulong get_sigframe(struct target_sigaction *ka,
4245 CPUPPCState *env,
4246 int frame_size)
4247 {
4248 target_ulong oldsp, newsp;
4249
4250 oldsp = env->gpr[1];
4251
4252 if ((ka->sa_flags & TARGET_SA_ONSTACK) &&
4253 (sas_ss_flags(oldsp) == 0)) {
4254 oldsp = (target_sigaltstack_used.ss_sp
4255 + target_sigaltstack_used.ss_size);
4256 }
4257
4258 newsp = (oldsp - frame_size) & ~0xFUL;
4259
4260 return newsp;
4261 }
4262
4263 static int save_user_regs(CPUPPCState *env, struct target_mcontext *frame,
4264 int sigret)
4265 {
4266 target_ulong msr = env->msr;
4267 int i;
4268 target_ulong ccr = 0;
4269
4270 /* In general, the kernel attempts to be intelligent about what it
4271 needs to save for Altivec/FP/SPE registers. We don't care that
4272 much, so we just go ahead and save everything. */
4273
4274 /* Save general registers. */
4275 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4276 if (__put_user(env->gpr[i], &frame->mc_gregs[i])) {
4277 return 1;
4278 }
4279 }
4280 if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
4281 || __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
4282 || __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
4283 || __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
4284 return 1;
4285
4286 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
4287 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
4288 }
4289 if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
4290 return 1;
4291
4292 /* Save Altivec registers if necessary. */
4293 if (env->insns_flags & PPC_ALTIVEC) {
4294 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
4295 ppc_avr_t *avr = &env->avr[i];
4296 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
4297
4298 if (__put_user(avr->u64[0], &vreg->u64[0]) ||
4299 __put_user(avr->u64[1], &vreg->u64[1])) {
4300 return 1;
4301 }
4302 }
4303 /* Set MSR_VR in the saved MSR value to indicate that
4304 frame->mc_vregs contains valid data. */
4305 msr |= MSR_VR;
4306 if (__put_user((uint32_t)env->spr[SPR_VRSAVE],
4307 &frame->mc_vregs.altivec[32].u32[3]))
4308 return 1;
4309 }
4310
4311 /* Save floating point registers. */
4312 if (env->insns_flags & PPC_FLOAT) {
4313 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
4314 if (__put_user(env->fpr[i], &frame->mc_fregs[i])) {
4315 return 1;
4316 }
4317 }
4318 if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32]))
4319 return 1;
4320 }
4321
4322 /* Save SPE registers. The kernel only saves the high half. */
4323 if (env->insns_flags & PPC_SPE) {
4324 #if defined(TARGET_PPC64)
4325 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4326 if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) {
4327 return 1;
4328 }
4329 }
4330 #else
4331 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
4332 if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
4333 return 1;
4334 }
4335 }
4336 #endif
4337 /* Set MSR_SPE in the saved MSR value to indicate that
4338 frame->mc_vregs contains valid data. */
4339 msr |= MSR_SPE;
4340 if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
4341 return 1;
4342 }
4343
4344 /* Store MSR. */
4345 if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
4346 return 1;
4347
4348 /* Set up the sigreturn trampoline: li r0,sigret; sc. */
4349 if (sigret) {
4350 if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) ||
4351 __put_user(0x44000002UL, &frame->tramp[1])) {
4352 return 1;
4353 }
4354 }
4355
4356 return 0;
4357 }
4358
4359 static int restore_user_regs(CPUPPCState *env,
4360 struct target_mcontext *frame, int sig)
4361 {
4362 target_ulong save_r2 = 0;
4363 target_ulong msr;
4364 target_ulong ccr;
4365
4366 int i;
4367
4368 if (!sig) {
4369 save_r2 = env->gpr[2];
4370 }
4371
4372 /* Restore general registers. */
4373 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4374 if (__get_user(env->gpr[i], &frame->mc_gregs[i])) {
4375 return 1;
4376 }
4377 }
4378 if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
4379 || __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
4380 || __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
4381 || __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
4382 return 1;
4383 if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
4384 return 1;
4385
4386 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
4387 env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf;
4388 }
4389
4390 if (!sig) {
4391 env->gpr[2] = save_r2;
4392 }
4393 /* Restore MSR. */
4394 if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
4395 return 1;
4396
4397 /* If doing signal return, restore the previous little-endian mode. */
4398 if (sig)
4399 env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE);
4400
4401 /* Restore Altivec registers if necessary. */
4402 if (env->insns_flags & PPC_ALTIVEC) {
4403 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
4404 ppc_avr_t *avr = &env->avr[i];
4405 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
4406
4407 if (__get_user(avr->u64[0], &vreg->u64[0]) ||
4408 __get_user(avr->u64[1], &vreg->u64[1])) {
4409 return 1;
4410 }
4411 }
4412 /* Set MSR_VEC in the saved MSR value to indicate that
4413 frame->mc_vregs contains valid data. */
4414 if (__get_user(env->spr[SPR_VRSAVE],
4415 (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3])))
4416 return 1;
4417 }
4418
4419 /* Restore floating point registers. */
4420 if (env->insns_flags & PPC_FLOAT) {
4421 uint64_t fpscr;
4422 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
4423 if (__get_user(env->fpr[i], &frame->mc_fregs[i])) {
4424 return 1;
4425 }
4426 }
4427 if (__get_user(fpscr, &frame->mc_fregs[32]))
4428 return 1;
4429 env->fpscr = (uint32_t) fpscr;
4430 }
4431
4432 /* Save SPE registers. The kernel only saves the high half. */
4433 if (env->insns_flags & PPC_SPE) {
4434 #if defined(TARGET_PPC64)
4435 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4436 uint32_t hi;
4437
4438 if (__get_user(hi, &frame->mc_vregs.spe[i])) {
4439 return 1;
4440 }
4441 env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
4442 }
4443 #else
4444 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
4445 if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
4446 return 1;
4447 }
4448 }
4449 #endif
4450 if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
4451 return 1;
4452 }
4453
4454 return 0;
4455 }
4456
4457 static void setup_frame(int sig, struct target_sigaction *ka,
4458 target_sigset_t *set, CPUPPCState *env)
4459 {
4460 struct target_sigframe *frame;
4461 struct target_sigcontext *sc;
4462 target_ulong frame_addr, newsp;
4463 int err = 0;
4464 int signal;
4465
4466 frame_addr = get_sigframe(ka, env, sizeof(*frame));
4467 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
4468 goto sigsegv;
4469 sc = &frame->sctx;
4470
4471 signal = current_exec_domain_sig(sig);
4472
4473 err |= __put_user(ka->_sa_handler, &sc->handler);
4474 err |= __put_user(set->sig[0], &sc->oldmask);
4475 #if defined(TARGET_PPC64)
4476 err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]);
4477 #else
4478 err |= __put_user(set->sig[1], &sc->_unused[3]);
4479 #endif
4480 err |= __put_user(h2g(&frame->mctx), &sc->regs);
4481 err |= __put_user(sig, &sc->signal);
4482
4483 /* Save user regs. */
4484 err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn);
4485
4486 /* The kernel checks for the presence of a VDSO here. We don't
4487 emulate a vdso, so use a sigreturn system call. */
4488 env->lr = (target_ulong) h2g(frame->mctx.tramp);
4489
4490 /* Turn off all fp exceptions. */
4491 env->fpscr = 0;
4492
4493 /* Create a stack frame for the caller of the handler. */
4494 newsp = frame_addr - SIGNAL_FRAMESIZE;
4495 err |= put_user(env->gpr[1], newsp, target_ulong);
4496
4497 if (err)
4498 goto sigsegv;
4499
4500 /* Set up registers for signal handler. */
4501 env->gpr[1] = newsp;
4502 env->gpr[3] = signal;
4503 env->gpr[4] = frame_addr + offsetof(struct target_sigframe, sctx);
4504 env->nip = (target_ulong) ka->_sa_handler;
4505 /* Signal handlers are entered in big-endian mode. */
4506 env->msr &= ~MSR_LE;
4507
4508 unlock_user_struct(frame, frame_addr, 1);
4509 return;
4510
4511 sigsegv:
4512 unlock_user_struct(frame, frame_addr, 1);
4513 qemu_log("segfaulting from setup_frame\n");
4514 force_sig(TARGET_SIGSEGV);
4515 }
4516
4517 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4518 target_siginfo_t *info,
4519 target_sigset_t *set, CPUPPCState *env)
4520 {
4521 struct target_rt_sigframe *rt_sf;
4522 struct target_mcontext *frame;
4523 target_ulong rt_sf_addr, newsp = 0;
4524 int i, err = 0;
4525 int signal;
4526
4527 rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
4528 if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1))
4529 goto sigsegv;
4530
4531 signal = current_exec_domain_sig(sig);
4532
4533 err |= copy_siginfo_to_user(&rt_sf->info, info);
4534
4535 err |= __put_user(0, &rt_sf->uc.tuc_flags);
4536 err |= __put_user(0, &rt_sf->uc.tuc_link);
4537 err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp,
4538 &rt_sf->uc.tuc_stack.ss_sp);
4539 err |= __put_user(sas_ss_flags(env->gpr[1]),
4540 &rt_sf->uc.tuc_stack.ss_flags);
4541 err |= __put_user(target_sigaltstack_used.ss_size,
4542 &rt_sf->uc.tuc_stack.ss_size);
4543 err |= __put_user(h2g (&rt_sf->uc.tuc_mcontext),
4544 &rt_sf->uc.tuc_regs);
4545 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
4546 err |= __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]);
4547 }
4548
4549 frame = &rt_sf->uc.tuc_mcontext;
4550 err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn);
4551
4552 /* The kernel checks for the presence of a VDSO here. We don't
4553 emulate a vdso, so use a sigreturn system call. */
4554 env->lr = (target_ulong) h2g(frame->tramp);
4555
4556 /* Turn off all fp exceptions. */
4557 env->fpscr = 0;
4558
4559 /* Create a stack frame for the caller of the handler. */
4560 newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
4561 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
4562
4563 if (err)
4564 goto sigsegv;
4565
4566 /* Set up registers for signal handler. */
4567 env->gpr[1] = newsp;
4568 env->gpr[3] = (target_ulong) signal;
4569 env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
4570 env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
4571 env->gpr[6] = (target_ulong) h2g(rt_sf);
4572 env->nip = (target_ulong) ka->_sa_handler;
4573 /* Signal handlers are entered in big-endian mode. */
4574 env->msr &= ~MSR_LE;
4575
4576 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4577 return;
4578
4579 sigsegv:
4580 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4581 qemu_log("segfaulting from setup_rt_frame\n");
4582 force_sig(TARGET_SIGSEGV);
4583
4584 }
4585
4586 long do_sigreturn(CPUPPCState *env)
4587 {
4588 struct target_sigcontext *sc = NULL;
4589 struct target_mcontext *sr = NULL;
4590 target_ulong sr_addr, sc_addr;
4591 sigset_t blocked;
4592 target_sigset_t set;
4593
4594 sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
4595 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1))
4596 goto sigsegv;
4597
4598 #if defined(TARGET_PPC64)
4599 set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32);
4600 #else
4601 if(__get_user(set.sig[0], &sc->oldmask) ||
4602 __get_user(set.sig[1], &sc->_unused[3]))
4603 goto sigsegv;
4604 #endif
4605 target_to_host_sigset_internal(&blocked, &set);
4606 sigprocmask(SIG_SETMASK, &blocked, NULL);
4607
4608 if (__get_user(sr_addr, &sc->regs))
4609 goto sigsegv;
4610 if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1))
4611 goto sigsegv;
4612 if (restore_user_regs(env, sr, 1))
4613 goto sigsegv;
4614
4615 unlock_user_struct(sr, sr_addr, 1);
4616 unlock_user_struct(sc, sc_addr, 1);
4617 return -TARGET_QEMU_ESIGRETURN;
4618
4619 sigsegv:
4620 unlock_user_struct(sr, sr_addr, 1);
4621 unlock_user_struct(sc, sc_addr, 1);
4622 qemu_log("segfaulting from do_sigreturn\n");
4623 force_sig(TARGET_SIGSEGV);
4624 return 0;
4625 }
4626
4627 /* See arch/powerpc/kernel/signal_32.c. */
4628 static int do_setcontext(struct target_ucontext *ucp, CPUPPCState *env, int sig)
4629 {
4630 struct target_mcontext *mcp;
4631 target_ulong mcp_addr;
4632 sigset_t blocked;
4633 target_sigset_t set;
4634
4635 if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask),
4636 sizeof (set)))
4637 return 1;
4638
4639 #if defined(TARGET_PPC64)
4640 fprintf (stderr, "do_setcontext: not implemented\n");
4641 return 0;
4642 #else
4643 if (__get_user(mcp_addr, &ucp->tuc_regs))
4644 return 1;
4645
4646 if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1))
4647 return 1;
4648
4649 target_to_host_sigset_internal(&blocked, &set);
4650 sigprocmask(SIG_SETMASK, &blocked, NULL);
4651 if (restore_user_regs(env, mcp, sig))
4652 goto sigsegv;
4653
4654 unlock_user_struct(mcp, mcp_addr, 1);
4655 return 0;
4656
4657 sigsegv:
4658 unlock_user_struct(mcp, mcp_addr, 1);
4659 return 1;
4660 #endif
4661 }
4662
4663 long do_rt_sigreturn(CPUPPCState *env)
4664 {
4665 struct target_rt_sigframe *rt_sf = NULL;
4666 target_ulong rt_sf_addr;
4667
4668 rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16;
4669 if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1))
4670 goto sigsegv;
4671
4672 if (do_setcontext(&rt_sf->uc, env, 1))
4673 goto sigsegv;
4674
4675 do_sigaltstack(rt_sf_addr
4676 + offsetof(struct target_rt_sigframe, uc.tuc_stack),
4677 0, env->gpr[1]);
4678
4679 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4680 return -TARGET_QEMU_ESIGRETURN;
4681
4682 sigsegv:
4683 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4684 qemu_log("segfaulting from do_rt_sigreturn\n");
4685 force_sig(TARGET_SIGSEGV);
4686 return 0;
4687 }
4688
4689 #elif defined(TARGET_M68K)
4690
4691 struct target_sigcontext {
4692 abi_ulong sc_mask;
4693 abi_ulong sc_usp;
4694 abi_ulong sc_d0;
4695 abi_ulong sc_d1;
4696 abi_ulong sc_a0;
4697 abi_ulong sc_a1;
4698 unsigned short sc_sr;
4699 abi_ulong sc_pc;
4700 };
4701
4702 struct target_sigframe
4703 {
4704 abi_ulong pretcode;
4705 int sig;
4706 int code;
4707 abi_ulong psc;
4708 char retcode[8];
4709 abi_ulong extramask[TARGET_NSIG_WORDS-1];
4710 struct target_sigcontext sc;
4711 };
4712
4713 typedef int target_greg_t;
4714 #define TARGET_NGREG 18
4715 typedef target_greg_t target_gregset_t[TARGET_NGREG];
4716
4717 typedef struct target_fpregset {
4718 int f_fpcntl[3];
4719 int f_fpregs[8*3];
4720 } target_fpregset_t;
4721
4722 struct target_mcontext {
4723 int version;
4724 target_gregset_t gregs;
4725 target_fpregset_t fpregs;
4726 };
4727
4728 #define TARGET_MCONTEXT_VERSION 2
4729
4730 struct target_ucontext {
4731 abi_ulong tuc_flags;
4732 abi_ulong tuc_link;
4733 target_stack_t tuc_stack;
4734 struct target_mcontext tuc_mcontext;
4735 abi_long tuc_filler[80];
4736 target_sigset_t tuc_sigmask;
4737 };
4738
4739 struct target_rt_sigframe
4740 {
4741 abi_ulong pretcode;
4742 int sig;
4743 abi_ulong pinfo;
4744 abi_ulong puc;
4745 char retcode[8];
4746 struct target_siginfo info;
4747 struct target_ucontext uc;
4748 };
4749
4750 static int
4751 setup_sigcontext(struct target_sigcontext *sc, CPUM68KState *env,
4752 abi_ulong mask)
4753 {
4754 int err = 0;
4755
4756 err |= __put_user(mask, &sc->sc_mask);
4757 err |= __put_user(env->aregs[7], &sc->sc_usp);
4758 err |= __put_user(env->dregs[0], &sc->sc_d0);
4759 err |= __put_user(env->dregs[1], &sc->sc_d1);
4760 err |= __put_user(env->aregs[0], &sc->sc_a0);
4761 err |= __put_user(env->aregs[1], &sc->sc_a1);
4762 err |= __put_user(env->sr, &sc->sc_sr);
4763 err |= __put_user(env->pc, &sc->sc_pc);
4764
4765 return err;
4766 }
4767
4768 static int
4769 restore_sigcontext(CPUM68KState *env, struct target_sigcontext *sc, int *pd0)
4770 {
4771 int err = 0;
4772 int temp;
4773
4774 err |= __get_user(env->aregs[7], &sc->sc_usp);
4775 err |= __get_user(env->dregs[1], &sc->sc_d1);
4776 err |= __get_user(env->aregs[0], &sc->sc_a0);
4777 err |= __get_user(env->aregs[1], &sc->sc_a1);
4778 err |= __get_user(env->pc, &sc->sc_pc);
4779 err |= __get_user(temp, &sc->sc_sr);
4780 env->sr = (env->sr & 0xff00) | (temp & 0xff);
4781
4782 *pd0 = tswapl(sc->sc_d0);
4783
4784 return err;
4785 }
4786
4787 /*
4788 * Determine which stack to use..
4789 */
4790 static inline abi_ulong
4791 get_sigframe(struct target_sigaction *ka, CPUM68KState *regs,
4792 size_t frame_size)
4793 {
4794 unsigned long sp;
4795
4796 sp = regs->aregs[7];
4797
4798 /* This is the X/Open sanctioned signal stack switching. */
4799 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
4800 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
4801 }
4802
4803 return ((sp - frame_size) & -8UL);
4804 }
4805
4806 static void setup_frame(int sig, struct target_sigaction *ka,
4807 target_sigset_t *set, CPUM68KState *env)
4808 {
4809 struct target_sigframe *frame;
4810 abi_ulong frame_addr;
4811 abi_ulong retcode_addr;
4812 abi_ulong sc_addr;
4813 int err = 0;
4814 int i;
4815
4816 frame_addr = get_sigframe(ka, env, sizeof *frame);
4817 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
4818 goto give_sigsegv;
4819
4820 err |= __put_user(sig, &frame->sig);
4821
4822 sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
4823 err |= __put_user(sc_addr, &frame->psc);
4824
4825 err |= setup_sigcontext(&frame->sc, env, set->sig[0]);
4826 if (err)
4827 goto give_sigsegv;
4828
4829 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
4830 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
4831 goto give_sigsegv;
4832 }
4833
4834 /* Set up to return from userspace. */
4835
4836 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
4837 err |= __put_user(retcode_addr, &frame->pretcode);
4838
4839 /* moveq #,d0; trap #0 */
4840
4841 err |= __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16),
4842 (long *)(frame->retcode));
4843
4844 if (err)
4845 goto give_sigsegv;
4846
4847 /* Set up to return from userspace */
4848
4849 env->aregs[7] = frame_addr;
4850 env->pc = ka->_sa_handler;
4851
4852 unlock_user_struct(frame, frame_addr, 1);
4853 return;
4854
4855 give_sigsegv:
4856 unlock_user_struct(frame, frame_addr, 1);
4857 force_sig(TARGET_SIGSEGV);
4858 }
4859
4860 static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
4861 CPUM68KState *env)
4862 {
4863 target_greg_t *gregs = uc->tuc_mcontext.gregs;
4864 int err;
4865
4866 err = __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version);
4867 err |= __put_user(env->dregs[0], &gregs[0]);
4868 err |= __put_user(env->dregs[1], &gregs[1]);
4869 err |= __put_user(env->dregs[2], &gregs[2]);
4870 err |= __put_user(env->dregs[3], &gregs[3]);
4871 err |= __put_user(env->dregs[4], &gregs[4]);
4872 err |= __put_user(env->dregs[5], &gregs[5]);
4873 err |= __put_user(env->dregs[6], &gregs[6]);
4874 err |= __put_user(env->dregs[7], &gregs[7]);
4875 err |= __put_user(env->aregs[0], &gregs[8]);
4876 err |= __put_user(env->aregs[1], &gregs[9]);
4877 err |= __put_user(env->aregs[2], &gregs[10]);
4878 err |= __put_user(env->aregs[3], &gregs[11]);
4879 err |= __put_user(env->aregs[4], &gregs[12]);
4880 err |= __put_user(env->aregs[5], &gregs[13]);
4881 err |= __put_user(env->aregs[6], &gregs[14]);
4882 err |= __put_user(env->aregs[7], &gregs[15]);
4883 err |= __put_user(env->pc, &gregs[16]);
4884 err |= __put_user(env->sr, &gregs[17]);
4885
4886 return err;
4887 }
4888
4889 static inline int target_rt_restore_ucontext(CPUM68KState *env,
4890 struct target_ucontext *uc,
4891 int *pd0)
4892 {
4893 int temp;
4894 int err;
4895 target_greg_t *gregs = uc->tuc_mcontext.gregs;
4896
4897 err = __get_user(temp, &uc->tuc_mcontext.version);
4898 if (temp != TARGET_MCONTEXT_VERSION)
4899 goto badframe;
4900
4901 /* restore passed registers */
4902 err |= __get_user(env->dregs[0], &gregs[0]);
4903 err |= __get_user(env->dregs[1], &gregs[1]);
4904 err |= __get_user(env->dregs[2], &gregs[2]);
4905 err |= __get_user(env->dregs[3], &gregs[3]);
4906 err |= __get_user(env->dregs[4], &gregs[4]);
4907 err |= __get_user(env->dregs[5], &gregs[5]);
4908 err |= __get_user(env->dregs[6], &gregs[6]);
4909 err |= __get_user(env->dregs[7], &gregs[7]);
4910 err |= __get_user(env->aregs[0], &gregs[8]);
4911 err |= __get_user(env->aregs[1], &gregs[9]);
4912 err |= __get_user(env->aregs[2], &gregs[10]);
4913 err |= __get_user(env->aregs[3], &gregs[11]);
4914 err |= __get_user(env->aregs[4], &gregs[12]);
4915 err |= __get_user(env->aregs[5], &gregs[13]);
4916 err |= __get_user(env->aregs[6], &gregs[14]);
4917 err |= __get_user(env->aregs[7], &gregs[15]);
4918 err |= __get_user(env->pc, &gregs[16]);
4919 err |= __get_user(temp, &gregs[17]);
4920 env->sr = (env->sr & 0xff00) | (temp & 0xff);
4921
4922 *pd0 = env->dregs[0];
4923 return err;
4924
4925 badframe:
4926 return 1;
4927 }
4928
4929 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4930 target_siginfo_t *info,
4931 target_sigset_t *set, CPUM68KState *env)
4932 {
4933 struct target_rt_sigframe *frame;
4934 abi_ulong frame_addr;
4935 abi_ulong retcode_addr;
4936 abi_ulong info_addr;
4937 abi_ulong uc_addr;
4938 int err = 0;
4939 int i;
4940
4941 frame_addr = get_sigframe(ka, env, sizeof *frame);
4942 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
4943 goto give_sigsegv;
4944
4945 err |= __put_user(sig, &frame->sig);
4946
4947 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
4948 err |= __put_user(info_addr, &frame->pinfo);
4949
4950 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
4951 err |= __put_user(uc_addr, &frame->puc);
4952
4953 err |= copy_siginfo_to_user(&frame->info, info);
4954
4955 /* Create the ucontext */
4956
4957 err |= __put_user(0, &frame->uc.tuc_flags);
4958 err |= __put_user(0, &frame->uc.tuc_link);
4959 err |= __put_user(target_sigaltstack_used.ss_sp,
4960 &frame->uc.tuc_stack.ss_sp);
4961 err |= __put_user(sas_ss_flags(env->aregs[7]),
4962 &frame->uc.tuc_stack.ss_flags);
4963 err |= __put_user(target_sigaltstack_used.ss_size,
4964 &frame->uc.tuc_stack.ss_size);
4965 err |= target_rt_setup_ucontext(&frame->uc, env);
4966
4967 if (err)
4968 goto give_sigsegv;
4969
4970 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
4971 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
4972 goto give_sigsegv;
4973 }
4974
4975 /* Set up to return from userspace. */
4976
4977 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
4978 err |= __put_user(retcode_addr, &frame->pretcode);
4979
4980 /* moveq #,d0; notb d0; trap #0 */
4981
4982 err |= __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
4983 (long *)(frame->retcode + 0));
4984 err |= __put_user(0x4e40, (short *)(frame->retcode + 4));
4985
4986 if (err)
4987 goto give_sigsegv;
4988
4989 /* Set up to return from userspace */
4990
4991 env->aregs[7] = frame_addr;
4992 env->pc = ka->_sa_handler;
4993
4994 unlock_user_struct(frame, frame_addr, 1);
4995 return;
4996
4997 give_sigsegv:
4998 unlock_user_struct(frame, frame_addr, 1);
4999 force_sig(TARGET_SIGSEGV);
5000 }
5001
5002 long do_sigreturn(CPUM68KState *env)
5003 {
5004 struct target_sigframe *frame;
5005 abi_ulong frame_addr = env->aregs[7] - 4;
5006 target_sigset_t target_set;
5007 sigset_t set;
5008 int d0, i;
5009
5010 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
5011 goto badframe;
5012
5013 /* set blocked signals */
5014
5015 if (__get_user(target_set.sig[0], &frame->sc.sc_mask))
5016 goto badframe;
5017
5018 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
5019 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
5020 goto badframe;
5021 }
5022
5023 target_to_host_sigset_internal(&set, &target_set);
5024 sigprocmask(SIG_SETMASK, &set, NULL);
5025
5026 /* restore registers */
5027
5028 if (restore_sigcontext(env, &frame->sc, &d0))
5029 goto badframe;
5030
5031 unlock_user_struct(frame, frame_addr, 0);
5032 return d0;
5033
5034 badframe:
5035 unlock_user_struct(frame, frame_addr, 0);
5036 force_sig(TARGET_SIGSEGV);
5037 return 0;
5038 }
5039
5040 long do_rt_sigreturn(CPUM68KState *env)
5041 {
5042 struct target_rt_sigframe *frame;
5043 abi_ulong frame_addr = env->aregs[7] - 4;
5044 target_sigset_t target_set;
5045 sigset_t set;
5046 int d0;
5047
5048 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
5049 goto badframe;
5050
5051 target_to_host_sigset_internal(&set, &target_set);
5052 sigprocmask(SIG_SETMASK, &set, NULL);
5053
5054 /* restore registers */
5055
5056 if (target_rt_restore_ucontext(env, &frame->uc, &d0))
5057 goto badframe;
5058
5059 if (do_sigaltstack(frame_addr +
5060 offsetof(struct target_rt_sigframe, uc.tuc_stack),
5061 0, get_sp_from_cpustate(env)) == -EFAULT)
5062 goto badframe;
5063
5064 unlock_user_struct(frame, frame_addr, 0);
5065 return d0;
5066
5067 badframe:
5068 unlock_user_struct(frame, frame_addr, 0);
5069 force_sig(TARGET_SIGSEGV);
5070 return 0;
5071 }
5072
5073 #elif defined(TARGET_ALPHA)
5074
5075 struct target_sigcontext {
5076 abi_long sc_onstack;
5077 abi_long sc_mask;
5078 abi_long sc_pc;
5079 abi_long sc_ps;
5080 abi_long sc_regs[32];
5081 abi_long sc_ownedfp;
5082 abi_long sc_fpregs[32];
5083 abi_ulong sc_fpcr;
5084 abi_ulong sc_fp_control;
5085 abi_ulong sc_reserved1;
5086 abi_ulong sc_reserved2;
5087 abi_ulong sc_ssize;
5088 abi_ulong sc_sbase;
5089 abi_ulong sc_traparg_a0;
5090 abi_ulong sc_traparg_a1;
5091 abi_ulong sc_traparg_a2;
5092 abi_ulong sc_fp_trap_pc;
5093 abi_ulong sc_fp_trigger_sum;
5094 abi_ulong sc_fp_trigger_inst;
5095 };
5096
5097 struct target_ucontext {
5098 abi_ulong tuc_flags;
5099 abi_ulong tuc_link;
5100 abi_ulong tuc_osf_sigmask;
5101 target_stack_t tuc_stack;
5102 struct target_sigcontext tuc_mcontext;
5103 target_sigset_t tuc_sigmask;
5104 };
5105
5106 struct target_sigframe {
5107 struct target_sigcontext sc;
5108 unsigned int retcode[3];
5109 };
5110
5111 struct target_rt_sigframe {
5112 target_siginfo_t info;
5113 struct target_ucontext uc;
5114 unsigned int retcode[3];
5115 };
5116
5117 #define INSN_MOV_R30_R16 0x47fe0410
5118 #define INSN_LDI_R0 0x201f0000
5119 #define INSN_CALLSYS 0x00000083
5120
5121 static int setup_sigcontext(struct target_sigcontext *sc, CPUAlphaState *env,
5122 abi_ulong frame_addr, target_sigset_t *set)
5123 {
5124 int i, err = 0;
5125
5126 err |= __put_user(on_sig_stack(frame_addr), &sc->sc_onstack);
5127 err |= __put_user(set->sig[0], &sc->sc_mask);
5128 err |= __put_user(env->pc, &sc->sc_pc);
5129 err |= __put_user(8, &sc->sc_ps);
5130
5131 for (i = 0; i < 31; ++i) {
5132 err |= __put_user(env->ir[i], &sc->sc_regs[i]);
5133 }
5134 err |= __put_user(0, &sc->sc_regs[31]);
5135
5136 for (i = 0; i < 31; ++i) {
5137 err |= __put_user(env->fir[i], &sc->sc_fpregs[i]);
5138 }
5139 err |= __put_user(0, &sc->sc_fpregs[31]);
5140 err |= __put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr);
5141
5142 err |= __put_user(0, &sc->sc_traparg_a0); /* FIXME */
5143 err |= __put_user(0, &sc->sc_traparg_a1); /* FIXME */
5144 err |= __put_user(0, &sc->sc_traparg_a2); /* FIXME */
5145
5146 return err;
5147 }
5148
5149 static int restore_sigcontext(CPUAlphaState *env,
5150 struct target_sigcontext *sc)
5151 {
5152 uint64_t fpcr;
5153 int i, err = 0;
5154
5155 err |= __get_user(env->pc, &sc->sc_pc);
5156
5157 for (i = 0; i < 31; ++i) {
5158 err |= __get_user(env->ir[i], &sc->sc_regs[i]);
5159 }
5160 for (i = 0; i < 31; ++i) {
5161 err |= __get_user(env->fir[i], &sc->sc_fpregs[i]);
5162 }
5163
5164 err |= __get_user(fpcr, &sc->sc_fpcr);
5165 cpu_alpha_store_fpcr(env, fpcr);
5166
5167 return err;
5168 }
5169
5170 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
5171 CPUAlphaState *env,
5172 unsigned long framesize)
5173 {
5174 abi_ulong sp = env->ir[IR_SP];
5175
5176 /* This is the X/Open sanctioned signal stack switching. */
5177 if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) {
5178 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
5179 }
5180 return (sp - framesize) & -32;
5181 }
5182
5183 static void setup_frame(int sig, struct target_sigaction *ka,
5184 target_sigset_t *set, CPUAlphaState *env)
5185 {
5186 abi_ulong frame_addr, r26;
5187 struct target_sigframe *frame;
5188 int err = 0;
5189
5190 frame_addr = get_sigframe(ka, env, sizeof(*frame));
5191 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5192 goto give_sigsegv;
5193 }
5194
5195 err |= setup_sigcontext(&frame->sc, env, frame_addr, set);
5196
5197 if (ka->sa_restorer) {
5198 r26 = ka->sa_restorer;
5199 } else {
5200 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
5201 err |= __put_user(INSN_LDI_R0 + TARGET_NR_sigreturn,
5202 &frame->retcode[1]);
5203 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]);
5204 /* imb() */
5205 r26 = frame_addr;
5206 }
5207
5208 unlock_user_struct(frame, frame_addr, 1);
5209
5210 if (err) {
5211 give_sigsegv:
5212 if (sig == TARGET_SIGSEGV) {
5213 ka->_sa_handler = TARGET_SIG_DFL;
5214 }
5215 force_sig(TARGET_SIGSEGV);
5216 }
5217
5218 env->ir[IR_RA] = r26;
5219 env->ir[IR_PV] = env->pc = ka->_sa_handler;
5220 env->ir[IR_A0] = sig;
5221 env->ir[IR_A1] = 0;
5222 env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc);
5223 env->ir[IR_SP] = frame_addr;
5224 }
5225
5226 static void setup_rt_frame(int sig, struct target_sigaction *ka,
5227 target_siginfo_t *info,
5228 target_sigset_t *set, CPUAlphaState *env)
5229 {
5230 abi_ulong frame_addr, r26;
5231 struct target_rt_sigframe *frame;
5232 int i, err = 0;
5233
5234 frame_addr = get_sigframe(ka, env, sizeof(*frame));
5235 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5236 goto give_sigsegv;
5237 }
5238
5239 err |= copy_siginfo_to_user(&frame->info, info);
5240
5241 err |= __put_user(0, &frame->uc.tuc_flags);
5242 err |= __put_user(0, &frame->uc.tuc_link);
5243 err |= __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask);
5244 err |= __put_user(target_sigaltstack_used.ss_sp,
5245 &frame->uc.tuc_stack.ss_sp);
5246 err |= __put_user(sas_ss_flags(env->ir[IR_SP]),
5247 &frame->uc.tuc_stack.ss_flags);
5248 err |= __put_user(target_sigaltstack_used.ss_size,
5249 &frame->uc.tuc_stack.ss_size);
5250 err |= setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set);
5251 for (i = 0; i < TARGET_NSIG_WORDS; ++i) {
5252 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
5253 }
5254
5255 if (ka->sa_restorer) {
5256 r26 = ka->sa_restorer;
5257 } else {
5258 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
5259 err |= __put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn,
5260 &frame->retcode[1]);
5261 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]);
5262 /* imb(); */
5263 r26 = frame_addr;
5264 }
5265
5266 if (err) {
5267 give_sigsegv:
5268 if (sig == TARGET_SIGSEGV) {
5269 ka->_sa_handler = TARGET_SIG_DFL;
5270 }
5271 force_sig(TARGET_SIGSEGV);
5272 }
5273
5274 env->ir[IR_RA] = r26;
5275 env->ir[IR_PV] = env->pc = ka->_sa_handler;
5276 env->ir[IR_A0] = sig;
5277 env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info);
5278 env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
5279 env->ir[IR_SP] = frame_addr;
5280 }
5281
5282 long do_sigreturn(CPUAlphaState *env)
5283 {
5284 struct target_sigcontext *sc;
5285 abi_ulong sc_addr = env->ir[IR_A0];
5286 target_sigset_t target_set;
5287 sigset_t set;
5288
5289 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) {
5290 goto badframe;
5291 }
5292
5293 target_sigemptyset(&target_set);
5294 if (__get_user(target_set.sig[0], &sc->sc_mask)) {
5295 goto badframe;
5296 }
5297
5298 target_to_host_sigset_internal(&set, &target_set);
5299 sigprocmask(SIG_SETMASK, &set, NULL);
5300
5301 if (restore_sigcontext(env, sc)) {
5302 goto badframe;
5303 }
5304 unlock_user_struct(sc, sc_addr, 0);
5305 return env->ir[IR_V0];
5306
5307 badframe:
5308 unlock_user_struct(sc, sc_addr, 0);
5309 force_sig(TARGET_SIGSEGV);
5310 }
5311
5312 long do_rt_sigreturn(CPUAlphaState *env)
5313 {
5314 abi_ulong frame_addr = env->ir[IR_A0];
5315 struct target_rt_sigframe *frame;
5316 sigset_t set;
5317
5318 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
5319 goto badframe;
5320 }
5321 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
5322 sigprocmask(SIG_SETMASK, &set, NULL);
5323
5324 if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
5325 goto badframe;
5326 }
5327 if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
5328 uc.tuc_stack),
5329 0, env->ir[IR_SP]) == -EFAULT) {
5330 goto badframe;
5331 }
5332
5333 unlock_user_struct(frame, frame_addr, 0);
5334 return env->ir[IR_V0];
5335
5336
5337 badframe:
5338 unlock_user_struct(frame, frame_addr, 0);
5339 force_sig(TARGET_SIGSEGV);
5340 }
5341
5342 #else
5343
5344 static void setup_frame(int sig, struct target_sigaction *ka,
5345 target_sigset_t *set, CPUArchState *env)
5346 {
5347 fprintf(stderr, "setup_frame: not implemented\n");
5348 }
5349
5350 static void setup_rt_frame(int sig, struct target_sigaction *ka,
5351 target_siginfo_t *info,
5352 target_sigset_t *set, CPUArchState *env)
5353 {
5354 fprintf(stderr, "setup_rt_frame: not implemented\n");
5355 }
5356
5357 long do_sigreturn(CPUArchState *env)
5358 {
5359 fprintf(stderr, "do_sigreturn: not implemented\n");
5360 return -TARGET_ENOSYS;
5361 }
5362
5363 long do_rt_sigreturn(CPUArchState *env)
5364 {
5365 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
5366 return -TARGET_ENOSYS;
5367 }
5368
5369 #endif
5370
5371 void process_pending_signals(CPUArchState *cpu_env)
5372 {
5373 int sig;
5374 abi_ulong handler;
5375 sigset_t set, old_set;
5376 target_sigset_t target_old_set;
5377 struct emulated_sigtable *k;
5378 struct target_sigaction *sa;
5379 struct sigqueue *q;
5380 TaskState *ts = cpu_env->opaque;
5381
5382 if (!ts->signal_pending)
5383 return;
5384
5385 /* FIXME: This is not threadsafe. */
5386 k = ts->sigtab;
5387 for(sig = 1; sig <= TARGET_NSIG; sig++) {
5388 if (k->pending)
5389 goto handle_signal;
5390 k++;
5391 }
5392 /* if no signal is pending, just return */
5393 ts->signal_pending = 0;
5394 return;
5395
5396 handle_signal:
5397 #ifdef DEBUG_SIGNAL
5398 fprintf(stderr, "qemu: process signal %d\n", sig);
5399 #endif
5400 /* dequeue signal */
5401 q = k->first;
5402 k->first = q->next;
5403 if (!k->first)
5404 k->pending = 0;
5405
5406 sig = gdb_handlesig (cpu_env, sig);
5407 if (!sig) {
5408 sa = NULL;
5409 handler = TARGET_SIG_IGN;
5410 } else {
5411 sa = &sigact_table[sig - 1];
5412 handler = sa->_sa_handler;
5413 }
5414
5415 if (handler == TARGET_SIG_DFL) {
5416 /* default handler : ignore some signal. The other are job control or fatal */
5417 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
5418 kill(getpid(),SIGSTOP);
5419 } else if (sig != TARGET_SIGCHLD &&
5420 sig != TARGET_SIGURG &&
5421 sig != TARGET_SIGWINCH &&
5422 sig != TARGET_SIGCONT) {
5423 force_sig(sig);
5424 }
5425 } else if (handler == TARGET_SIG_IGN) {
5426 /* ignore sig */
5427 } else if (handler == TARGET_SIG_ERR) {
5428 force_sig(sig);
5429 } else {
5430 /* compute the blocked signals during the handler execution */
5431 target_to_host_sigset(&set, &sa->sa_mask);
5432 /* SA_NODEFER indicates that the current signal should not be
5433 blocked during the handler */
5434 if (!(sa->sa_flags & TARGET_SA_NODEFER))
5435 sigaddset(&set, target_to_host_signal(sig));
5436
5437 /* block signals in the handler using Linux */
5438 sigprocmask(SIG_BLOCK, &set, &old_set);
5439 /* save the previous blocked signal state to restore it at the
5440 end of the signal execution (see do_sigreturn) */
5441 host_to_target_sigset_internal(&target_old_set, &old_set);
5442
5443 /* if the CPU is in VM86 mode, we restore the 32 bit values */
5444 #if defined(TARGET_I386) && !defined(TARGET_X86_64)
5445 {
5446 CPUX86State *env = cpu_env;
5447 if (env->eflags & VM_MASK)
5448 save_v86_state(env);
5449 }
5450 #endif
5451 /* prepare the stack frame of the virtual CPU */
5452 #if defined(TARGET_ABI_MIPSN32) || defined(TARGET_ABI_MIPSN64)
5453 /* These targets do not have traditional signals. */
5454 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
5455 #else
5456 if (sa->sa_flags & TARGET_SA_SIGINFO)
5457 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
5458 else
5459 setup_frame(sig, sa, &target_old_set, cpu_env);
5460 #endif
5461 if (sa->sa_flags & TARGET_SA_RESETHAND)
5462 sa->_sa_handler = TARGET_SIG_DFL;
5463 }
5464 if (q != &k->info)
5465 free_sigqueue(cpu_env, q);
5466 }
Qemu with PowerPC KVM improvements