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i8254: Fix migration from older versions
[qemu.git] / linux-user / signal.c
blobce033e90b4281cba1aa79f05c6cc3eee3579015c
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 <signal.h>
25 #include <errno.h>
26 #include <assert.h>
27 #include <sys/ucontext.h>
28 #include <sys/resource.h>
29
30 #include "qemu.h"
31 #include "qemu-common.h"
32 #include "target_signal.h"
33
34 //#define DEBUG_SIGNAL
35
36 static struct target_sigaltstack target_sigaltstack_used = {
37 .ss_sp = 0,
38 .ss_size = 0,
39 .ss_flags = TARGET_SS_DISABLE,
40 };
41
42 static struct target_sigaction sigact_table[TARGET_NSIG];
43
44 static void host_signal_handler(int host_signum, siginfo_t *info,
45 void *puc);
46
47 static uint8_t host_to_target_signal_table[_NSIG] = {
48 [SIGHUP] = TARGET_SIGHUP,
49 [SIGINT] = TARGET_SIGINT,
50 [SIGQUIT] = TARGET_SIGQUIT,
51 [SIGILL] = TARGET_SIGILL,
52 [SIGTRAP] = TARGET_SIGTRAP,
53 [SIGABRT] = TARGET_SIGABRT,
54 /* [SIGIOT] = TARGET_SIGIOT,*/
55 [SIGBUS] = TARGET_SIGBUS,
56 [SIGFPE] = TARGET_SIGFPE,
57 [SIGKILL] = TARGET_SIGKILL,
58 [SIGUSR1] = TARGET_SIGUSR1,
59 [SIGSEGV] = TARGET_SIGSEGV,
60 [SIGUSR2] = TARGET_SIGUSR2,
61 [SIGPIPE] = TARGET_SIGPIPE,
62 [SIGALRM] = TARGET_SIGALRM,
63 [SIGTERM] = TARGET_SIGTERM,
64 #ifdef SIGSTKFLT
65 [SIGSTKFLT] = TARGET_SIGSTKFLT,
66 #endif
67 [SIGCHLD] = TARGET_SIGCHLD,
68 [SIGCONT] = TARGET_SIGCONT,
69 [SIGSTOP] = TARGET_SIGSTOP,
70 [SIGTSTP] = TARGET_SIGTSTP,
71 [SIGTTIN] = TARGET_SIGTTIN,
72 [SIGTTOU] = TARGET_SIGTTOU,
73 [SIGURG] = TARGET_SIGURG,
74 [SIGXCPU] = TARGET_SIGXCPU,
75 [SIGXFSZ] = TARGET_SIGXFSZ,
76 [SIGVTALRM] = TARGET_SIGVTALRM,
77 [SIGPROF] = TARGET_SIGPROF,
78 [SIGWINCH] = TARGET_SIGWINCH,
79 [SIGIO] = TARGET_SIGIO,
80 [SIGPWR] = TARGET_SIGPWR,
81 [SIGSYS] = TARGET_SIGSYS,
82 /* next signals stay the same */
83 /* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with
84 host libpthread signals. This assumes noone actually uses SIGRTMAX :-/
85 To fix this properly we need to do manual signal delivery multiplexed
86 over a single host signal. */
87 [__SIGRTMIN] = __SIGRTMAX,
88 [__SIGRTMAX] = __SIGRTMIN,
89 };
90 static uint8_t target_to_host_signal_table[_NSIG];
91
92 static inline int on_sig_stack(unsigned long sp)
93 {
94 return (sp - target_sigaltstack_used.ss_sp
95 < target_sigaltstack_used.ss_size);
96 }
97
98 static inline int sas_ss_flags(unsigned long sp)
99 {
100 return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE
101 : on_sig_stack(sp) ? SS_ONSTACK : 0);
102 }
103
104 int host_to_target_signal(int sig)
105 {
106 if (sig >= _NSIG)
107 return sig;
108 return host_to_target_signal_table[sig];
109 }
110
111 int target_to_host_signal(int sig)
112 {
113 if (sig >= _NSIG)
114 return sig;
115 return target_to_host_signal_table[sig];
116 }
117
118 static inline void target_sigemptyset(target_sigset_t *set)
119 {
120 memset(set, 0, sizeof(*set));
121 }
122
123 static inline void target_sigaddset(target_sigset_t *set, int signum)
124 {
125 signum--;
126 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
127 set->sig[signum / TARGET_NSIG_BPW] |= mask;
128 }
129
130 static inline int target_sigismember(const target_sigset_t *set, int signum)
131 {
132 signum--;
133 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
134 return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0);
135 }
136
137 static void host_to_target_sigset_internal(target_sigset_t *d,
138 const sigset_t *s)
139 {
140 int i;
141 target_sigemptyset(d);
142 for (i = 1; i <= TARGET_NSIG; i++) {
143 if (sigismember(s, i)) {
144 target_sigaddset(d, host_to_target_signal(i));
145 }
146 }
147 }
148
149 void host_to_target_sigset(target_sigset_t *d, const sigset_t *s)
150 {
151 target_sigset_t d1;
152 int i;
153
154 host_to_target_sigset_internal(&d1, s);
155 for(i = 0;i < TARGET_NSIG_WORDS; i++)
156 d->sig[i] = tswapl(d1.sig[i]);
157 }
158
159 static void target_to_host_sigset_internal(sigset_t *d,
160 const target_sigset_t *s)
161 {
162 int i;
163 sigemptyset(d);
164 for (i = 1; i <= TARGET_NSIG; i++) {
165 if (target_sigismember(s, i)) {
166 sigaddset(d, target_to_host_signal(i));
167 }
168 }
169 }
170
171 void target_to_host_sigset(sigset_t *d, const target_sigset_t *s)
172 {
173 target_sigset_t s1;
174 int i;
175
176 for(i = 0;i < TARGET_NSIG_WORDS; i++)
177 s1.sig[i] = tswapl(s->sig[i]);
178 target_to_host_sigset_internal(d, &s1);
179 }
180
181 void host_to_target_old_sigset(abi_ulong *old_sigset,
182 const sigset_t *sigset)
183 {
184 target_sigset_t d;
185 host_to_target_sigset(&d, sigset);
186 *old_sigset = d.sig[0];
187 }
188
189 void target_to_host_old_sigset(sigset_t *sigset,
190 const abi_ulong *old_sigset)
191 {
192 target_sigset_t d;
193 int i;
194
195 d.sig[0] = *old_sigset;
196 for(i = 1;i < TARGET_NSIG_WORDS; i++)
197 d.sig[i] = 0;
198 target_to_host_sigset(sigset, &d);
199 }
200
201 /* siginfo conversion */
202
203 static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
204 const siginfo_t *info)
205 {
206 int sig;
207 sig = host_to_target_signal(info->si_signo);
208 tinfo->si_signo = sig;
209 tinfo->si_errno = 0;
210 tinfo->si_code = info->si_code;
211 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
212 sig == SIGBUS || sig == SIGTRAP) {
213 /* should never come here, but who knows. The information for
214 the target is irrelevant */
215 tinfo->_sifields._sigfault._addr = 0;
216 } else if (sig == SIGIO) {
217 tinfo->_sifields._sigpoll._fd = info->si_fd;
218 } else if (sig >= TARGET_SIGRTMIN) {
219 tinfo->_sifields._rt._pid = info->si_pid;
220 tinfo->_sifields._rt._uid = info->si_uid;
221 /* XXX: potential problem if 64 bit */
222 tinfo->_sifields._rt._sigval.sival_ptr =
223 (abi_ulong)(unsigned long)info->si_value.sival_ptr;
224 }
225 }
226
227 static void tswap_siginfo(target_siginfo_t *tinfo,
228 const target_siginfo_t *info)
229 {
230 int sig;
231 sig = info->si_signo;
232 tinfo->si_signo = tswap32(sig);
233 tinfo->si_errno = tswap32(info->si_errno);
234 tinfo->si_code = tswap32(info->si_code);
235 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
236 sig == SIGBUS || sig == SIGTRAP) {
237 tinfo->_sifields._sigfault._addr =
238 tswapl(info->_sifields._sigfault._addr);
239 } else if (sig == SIGIO) {
240 tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
241 } else if (sig >= TARGET_SIGRTMIN) {
242 tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid);
243 tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid);
244 tinfo->_sifields._rt._sigval.sival_ptr =
245 tswapl(info->_sifields._rt._sigval.sival_ptr);
246 }
247 }
248
249
250 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info)
251 {
252 host_to_target_siginfo_noswap(tinfo, info);
253 tswap_siginfo(tinfo, tinfo);
254 }
255
256 /* XXX: we support only POSIX RT signals are used. */
257 /* XXX: find a solution for 64 bit (additional malloced data is needed) */
258 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo)
259 {
260 info->si_signo = tswap32(tinfo->si_signo);
261 info->si_errno = tswap32(tinfo->si_errno);
262 info->si_code = tswap32(tinfo->si_code);
263 info->si_pid = tswap32(tinfo->_sifields._rt._pid);
264 info->si_uid = tswap32(tinfo->_sifields._rt._uid);
265 info->si_value.sival_ptr =
266 (void *)(long)tswapl(tinfo->_sifields._rt._sigval.sival_ptr);
267 }
268
269 static int fatal_signal (int sig)
270 {
271 switch (sig) {
272 case TARGET_SIGCHLD:
273 case TARGET_SIGURG:
274 case TARGET_SIGWINCH:
275 /* Ignored by default. */
276 return 0;
277 case TARGET_SIGCONT:
278 case TARGET_SIGSTOP:
279 case TARGET_SIGTSTP:
280 case TARGET_SIGTTIN:
281 case TARGET_SIGTTOU:
282 /* Job control signals. */
283 return 0;
284 default:
285 return 1;
286 }
287 }
288
289 /* returns 1 if given signal should dump core if not handled */
290 static int core_dump_signal(int sig)
291 {
292 switch (sig) {
293 case TARGET_SIGABRT:
294 case TARGET_SIGFPE:
295 case TARGET_SIGILL:
296 case TARGET_SIGQUIT:
297 case TARGET_SIGSEGV:
298 case TARGET_SIGTRAP:
299 case TARGET_SIGBUS:
300 return (1);
301 default:
302 return (0);
303 }
304 }
305
306 void signal_init(void)
307 {
308 struct sigaction act;
309 struct sigaction oact;
310 int i, j;
311 int host_sig;
312
313 /* generate signal conversion tables */
314 for(i = 1; i < _NSIG; i++) {
315 if (host_to_target_signal_table[i] == 0)
316 host_to_target_signal_table[i] = i;
317 }
318 for(i = 1; i < _NSIG; i++) {
319 j = host_to_target_signal_table[i];
320 target_to_host_signal_table[j] = i;
321 }
322
323 /* set all host signal handlers. ALL signals are blocked during
324 the handlers to serialize them. */
325 memset(sigact_table, 0, sizeof(sigact_table));
326
327 sigfillset(&act.sa_mask);
328 act.sa_flags = SA_SIGINFO;
329 act.sa_sigaction = host_signal_handler;
330 for(i = 1; i <= TARGET_NSIG; i++) {
331 host_sig = target_to_host_signal(i);
332 sigaction(host_sig, NULL, &oact);
333 if (oact.sa_sigaction == (void *)SIG_IGN) {
334 sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
335 } else if (oact.sa_sigaction == (void *)SIG_DFL) {
336 sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
337 }
338 /* If there's already a handler installed then something has
339 gone horribly wrong, so don't even try to handle that case. */
340 /* Install some handlers for our own use. We need at least
341 SIGSEGV and SIGBUS, to detect exceptions. We can not just
342 trap all signals because it affects syscall interrupt
343 behavior. But do trap all default-fatal signals. */
344 if (fatal_signal (i))
345 sigaction(host_sig, &act, NULL);
346 }
347 }
348
349 /* signal queue handling */
350
351 static inline struct sigqueue *alloc_sigqueue(CPUState *env)
352 {
353 TaskState *ts = env->opaque;
354 struct sigqueue *q = ts->first_free;
355 if (!q)
356 return NULL;
357 ts->first_free = q->next;
358 return q;
359 }
360
361 static inline void free_sigqueue(CPUState *env, struct sigqueue *q)
362 {
363 TaskState *ts = env->opaque;
364 q->next = ts->first_free;
365 ts->first_free = q;
366 }
367
368 /* abort execution with signal */
369 static void QEMU_NORETURN force_sig(int target_sig)
370 {
371 TaskState *ts = (TaskState *)thread_env->opaque;
372 int host_sig, core_dumped = 0;
373 struct sigaction act;
374 host_sig = target_to_host_signal(target_sig);
375 gdb_signalled(thread_env, target_sig);
376
377 /* dump core if supported by target binary format */
378 if (core_dump_signal(target_sig) && (ts->bprm->core_dump != NULL)) {
379 stop_all_tasks();
380 core_dumped =
381 ((*ts->bprm->core_dump)(target_sig, thread_env) == 0);
382 }
383 if (core_dumped) {
384 /* we already dumped the core of target process, we don't want
385 * a coredump of qemu itself */
386 struct rlimit nodump;
387 getrlimit(RLIMIT_CORE, &nodump);
388 nodump.rlim_cur=0;
389 setrlimit(RLIMIT_CORE, &nodump);
390 (void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n",
391 target_sig, strsignal(host_sig), "core dumped" );
392 }
393
394 /* The proper exit code for dieing from an uncaught signal is
395 * -<signal>. The kernel doesn't allow exit() or _exit() to pass
396 * a negative value. To get the proper exit code we need to
397 * actually die from an uncaught signal. Here the default signal
398 * handler is installed, we send ourself a signal and we wait for
399 * it to arrive. */
400 sigfillset(&act.sa_mask);
401 act.sa_handler = SIG_DFL;
402 sigaction(host_sig, &act, NULL);
403
404 /* For some reason raise(host_sig) doesn't send the signal when
405 * statically linked on x86-64. */
406 kill(getpid(), host_sig);
407
408 /* Make sure the signal isn't masked (just reuse the mask inside
409 of act) */
410 sigdelset(&act.sa_mask, host_sig);
411 sigsuspend(&act.sa_mask);
412
413 /* unreachable */
414 abort();
415 }
416
417 /* queue a signal so that it will be send to the virtual CPU as soon
418 as possible */
419 int queue_signal(CPUState *env, int sig, target_siginfo_t *info)
420 {
421 TaskState *ts = env->opaque;
422 struct emulated_sigtable *k;
423 struct sigqueue *q, **pq;
424 abi_ulong handler;
425 int queue;
426
427 #if defined(DEBUG_SIGNAL)
428 fprintf(stderr, "queue_signal: sig=%d\n",
429 sig);
430 #endif
431 k = &ts->sigtab[sig - 1];
432 queue = gdb_queuesig ();
433 handler = sigact_table[sig - 1]._sa_handler;
434 if (!queue && handler == TARGET_SIG_DFL) {
435 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
436 kill(getpid(),SIGSTOP);
437 return 0;
438 } else
439 /* default handler : ignore some signal. The other are fatal */
440 if (sig != TARGET_SIGCHLD &&
441 sig != TARGET_SIGURG &&
442 sig != TARGET_SIGWINCH &&
443 sig != TARGET_SIGCONT) {
444 force_sig(sig);
445 } else {
446 return 0; /* indicate ignored */
447 }
448 } else if (!queue && handler == TARGET_SIG_IGN) {
449 /* ignore signal */
450 return 0;
451 } else if (!queue && handler == TARGET_SIG_ERR) {
452 force_sig(sig);
453 } else {
454 pq = &k->first;
455 if (sig < TARGET_SIGRTMIN) {
456 /* if non real time signal, we queue exactly one signal */
457 if (!k->pending)
458 q = &k->info;
459 else
460 return 0;
461 } else {
462 if (!k->pending) {
463 /* first signal */
464 q = &k->info;
465 } else {
466 q = alloc_sigqueue(env);
467 if (!q)
468 return -EAGAIN;
469 while (*pq != NULL)
470 pq = &(*pq)->next;
471 }
472 }
473 *pq = q;
474 q->info = *info;
475 q->next = NULL;
476 k->pending = 1;
477 /* signal that a new signal is pending */
478 ts->signal_pending = 1;
479 return 1; /* indicates that the signal was queued */
480 }
481 }
482
483 static void host_signal_handler(int host_signum, siginfo_t *info,
484 void *puc)
485 {
486 int sig;
487 target_siginfo_t tinfo;
488
489 /* the CPU emulator uses some host signals to detect exceptions,
490 we forward to it some signals */
491 if ((host_signum == SIGSEGV || host_signum == SIGBUS)
492 && info->si_code > 0) {
493 if (cpu_signal_handler(host_signum, info, puc))
494 return;
495 }
496
497 /* get target signal number */
498 sig = host_to_target_signal(host_signum);
499 if (sig < 1 || sig > TARGET_NSIG)
500 return;
501 #if defined(DEBUG_SIGNAL)
502 fprintf(stderr, "qemu: got signal %d\n", sig);
503 #endif
504 host_to_target_siginfo_noswap(&tinfo, info);
505 if (queue_signal(thread_env, sig, &tinfo) == 1) {
506 /* interrupt the virtual CPU as soon as possible */
507 cpu_exit(thread_env);
508 }
509 }
510
511 /* do_sigaltstack() returns target values and errnos. */
512 /* compare linux/kernel/signal.c:do_sigaltstack() */
513 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
514 {
515 int ret;
516 struct target_sigaltstack oss;
517
518 /* XXX: test errors */
519 if(uoss_addr)
520 {
521 __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
522 __put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
523 __put_user(sas_ss_flags(sp), &oss.ss_flags);
524 }
525
526 if(uss_addr)
527 {
528 struct target_sigaltstack *uss;
529 struct target_sigaltstack ss;
530
531 ret = -TARGET_EFAULT;
532 if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)
533 || __get_user(ss.ss_sp, &uss->ss_sp)
534 || __get_user(ss.ss_size, &uss->ss_size)
535 || __get_user(ss.ss_flags, &uss->ss_flags))
536 goto out;
537 unlock_user_struct(uss, uss_addr, 0);
538
539 ret = -TARGET_EPERM;
540 if (on_sig_stack(sp))
541 goto out;
542
543 ret = -TARGET_EINVAL;
544 if (ss.ss_flags != TARGET_SS_DISABLE
545 && ss.ss_flags != TARGET_SS_ONSTACK
546 && ss.ss_flags != 0)
547 goto out;
548
549 if (ss.ss_flags == TARGET_SS_DISABLE) {
550 ss.ss_size = 0;
551 ss.ss_sp = 0;
552 } else {
553 ret = -TARGET_ENOMEM;
554 if (ss.ss_size < MINSIGSTKSZ)
555 goto out;
556 }
557
558 target_sigaltstack_used.ss_sp = ss.ss_sp;
559 target_sigaltstack_used.ss_size = ss.ss_size;
560 }
561
562 if (uoss_addr) {
563 ret = -TARGET_EFAULT;
564 if (copy_to_user(uoss_addr, &oss, sizeof(oss)))
565 goto out;
566 }
567
568 ret = 0;
569 out:
570 return ret;
571 }
572
573 /* do_sigaction() return host values and errnos */
574 int do_sigaction(int sig, const struct target_sigaction *act,
575 struct target_sigaction *oact)
576 {
577 struct target_sigaction *k;
578 struct sigaction act1;
579 int host_sig;
580 int ret = 0;
581
582 if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP)
583 return -EINVAL;
584 k = &sigact_table[sig - 1];
585 #if defined(DEBUG_SIGNAL)
586 fprintf(stderr, "sigaction sig=%d act=0x%p, oact=0x%p\n",
587 sig, act, oact);
588 #endif
589 if (oact) {
590 oact->_sa_handler = tswapl(k->_sa_handler);
591 oact->sa_flags = tswapl(k->sa_flags);
592 #if !defined(TARGET_MIPS)
593 oact->sa_restorer = tswapl(k->sa_restorer);
594 #endif
595 oact->sa_mask = k->sa_mask;
596 }
597 if (act) {
598 /* FIXME: This is not threadsafe. */
599 k->_sa_handler = tswapl(act->_sa_handler);
600 k->sa_flags = tswapl(act->sa_flags);
601 #if !defined(TARGET_MIPS)
602 k->sa_restorer = tswapl(act->sa_restorer);
603 #endif
604 k->sa_mask = act->sa_mask;
605
606 /* we update the host linux signal state */
607 host_sig = target_to_host_signal(sig);
608 if (host_sig != SIGSEGV && host_sig != SIGBUS) {
609 sigfillset(&act1.sa_mask);
610 act1.sa_flags = SA_SIGINFO;
611 if (k->sa_flags & TARGET_SA_RESTART)
612 act1.sa_flags |= SA_RESTART;
613 /* NOTE: it is important to update the host kernel signal
614 ignore state to avoid getting unexpected interrupted
615 syscalls */
616 if (k->_sa_handler == TARGET_SIG_IGN) {
617 act1.sa_sigaction = (void *)SIG_IGN;
618 } else if (k->_sa_handler == TARGET_SIG_DFL) {
619 if (fatal_signal (sig))
620 act1.sa_sigaction = host_signal_handler;
621 else
622 act1.sa_sigaction = (void *)SIG_DFL;
623 } else {
624 act1.sa_sigaction = host_signal_handler;
625 }
626 ret = sigaction(host_sig, &act1, NULL);
627 }
628 }
629 return ret;
630 }
631
632 static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
633 const target_siginfo_t *info)
634 {
635 tswap_siginfo(tinfo, info);
636 return 0;
637 }
638
639 static inline int current_exec_domain_sig(int sig)
640 {
641 return /* current->exec_domain && current->exec_domain->signal_invmap
642 && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
643 }
644
645 #if defined(TARGET_I386) && TARGET_ABI_BITS == 32
646
647 /* from the Linux kernel */
648
649 struct target_fpreg {
650 uint16_t significand[4];
651 uint16_t exponent;
652 };
653
654 struct target_fpxreg {
655 uint16_t significand[4];
656 uint16_t exponent;
657 uint16_t padding[3];
658 };
659
660 struct target_xmmreg {
661 abi_ulong element[4];
662 };
663
664 struct target_fpstate {
665 /* Regular FPU environment */
666 abi_ulong cw;
667 abi_ulong sw;
668 abi_ulong tag;
669 abi_ulong ipoff;
670 abi_ulong cssel;
671 abi_ulong dataoff;
672 abi_ulong datasel;
673 struct target_fpreg _st[8];
674 uint16_t status;
675 uint16_t magic; /* 0xffff = regular FPU data only */
676
677 /* FXSR FPU environment */
678 abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
679 abi_ulong mxcsr;
680 abi_ulong reserved;
681 struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
682 struct target_xmmreg _xmm[8];
683 abi_ulong padding[56];
684 };
685
686 #define X86_FXSR_MAGIC 0x0000
687
688 struct target_sigcontext {
689 uint16_t gs, __gsh;
690 uint16_t fs, __fsh;
691 uint16_t es, __esh;
692 uint16_t ds, __dsh;
693 abi_ulong edi;
694 abi_ulong esi;
695 abi_ulong ebp;
696 abi_ulong esp;
697 abi_ulong ebx;
698 abi_ulong edx;
699 abi_ulong ecx;
700 abi_ulong eax;
701 abi_ulong trapno;
702 abi_ulong err;
703 abi_ulong eip;
704 uint16_t cs, __csh;
705 abi_ulong eflags;
706 abi_ulong esp_at_signal;
707 uint16_t ss, __ssh;
708 abi_ulong fpstate; /* pointer */
709 abi_ulong oldmask;
710 abi_ulong cr2;
711 };
712
713 struct target_ucontext {
714 abi_ulong tuc_flags;
715 abi_ulong tuc_link;
716 target_stack_t tuc_stack;
717 struct target_sigcontext tuc_mcontext;
718 target_sigset_t tuc_sigmask; /* mask last for extensibility */
719 };
720
721 struct sigframe
722 {
723 abi_ulong pretcode;
724 int sig;
725 struct target_sigcontext sc;
726 struct target_fpstate fpstate;
727 abi_ulong extramask[TARGET_NSIG_WORDS-1];
728 char retcode[8];
729 };
730
731 struct rt_sigframe
732 {
733 abi_ulong pretcode;
734 int sig;
735 abi_ulong pinfo;
736 abi_ulong puc;
737 struct target_siginfo info;
738 struct target_ucontext uc;
739 struct target_fpstate fpstate;
740 char retcode[8];
741 };
742
743 /*
744 * Set up a signal frame.
745 */
746
747 /* XXX: save x87 state */
748 static int
749 setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
750 CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr)
751 {
752 int err = 0;
753 uint16_t magic;
754
755 /* already locked in setup_frame() */
756 err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
757 err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
758 err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
759 err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
760 err |= __put_user(env->regs[R_EDI], &sc->edi);
761 err |= __put_user(env->regs[R_ESI], &sc->esi);
762 err |= __put_user(env->regs[R_EBP], &sc->ebp);
763 err |= __put_user(env->regs[R_ESP], &sc->esp);
764 err |= __put_user(env->regs[R_EBX], &sc->ebx);
765 err |= __put_user(env->regs[R_EDX], &sc->edx);
766 err |= __put_user(env->regs[R_ECX], &sc->ecx);
767 err |= __put_user(env->regs[R_EAX], &sc->eax);
768 err |= __put_user(env->exception_index, &sc->trapno);
769 err |= __put_user(env->error_code, &sc->err);
770 err |= __put_user(env->eip, &sc->eip);
771 err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
772 err |= __put_user(env->eflags, &sc->eflags);
773 err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
774 err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
775
776 cpu_x86_fsave(env, fpstate_addr, 1);
777 fpstate->status = fpstate->sw;
778 magic = 0xffff;
779 err |= __put_user(magic, &fpstate->magic);
780 err |= __put_user(fpstate_addr, &sc->fpstate);
781
782 /* non-iBCS2 extensions.. */
783 err |= __put_user(mask, &sc->oldmask);
784 err |= __put_user(env->cr[2], &sc->cr2);
785 return err;
786 }
787
788 /*
789 * Determine which stack to use..
790 */
791
792 static inline abi_ulong
793 get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
794 {
795 unsigned long esp;
796
797 /* Default to using normal stack */
798 esp = env->regs[R_ESP];
799 /* This is the X/Open sanctioned signal stack switching. */
800 if (ka->sa_flags & TARGET_SA_ONSTACK) {
801 if (sas_ss_flags(esp) == 0)
802 esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
803 }
804
805 /* This is the legacy signal stack switching. */
806 else
807 if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
808 !(ka->sa_flags & TARGET_SA_RESTORER) &&
809 ka->sa_restorer) {
810 esp = (unsigned long) ka->sa_restorer;
811 }
812 return (esp - frame_size) & -8ul;
813 }
814
815 /* compare linux/arch/i386/kernel/signal.c:setup_frame() */
816 static void setup_frame(int sig, struct target_sigaction *ka,
817 target_sigset_t *set, CPUX86State *env)
818 {
819 abi_ulong frame_addr;
820 struct sigframe *frame;
821 int i, err = 0;
822
823 frame_addr = get_sigframe(ka, env, sizeof(*frame));
824
825 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
826 goto give_sigsegv;
827
828 err |= __put_user(current_exec_domain_sig(sig),
829 &frame->sig);
830 if (err)
831 goto give_sigsegv;
832
833 setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
834 frame_addr + offsetof(struct sigframe, fpstate));
835 if (err)
836 goto give_sigsegv;
837
838 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
839 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
840 goto give_sigsegv;
841 }
842
843 /* Set up to return from userspace. If provided, use a stub
844 already in userspace. */
845 if (ka->sa_flags & TARGET_SA_RESTORER) {
846 err |= __put_user(ka->sa_restorer, &frame->pretcode);
847 } else {
848 uint16_t val16;
849 abi_ulong retcode_addr;
850 retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
851 err |= __put_user(retcode_addr, &frame->pretcode);
852 /* This is popl %eax ; movl $,%eax ; int $0x80 */
853 val16 = 0xb858;
854 err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
855 err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
856 val16 = 0x80cd;
857 err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
858 }
859
860 if (err)
861 goto give_sigsegv;
862
863 /* Set up registers for signal handler */
864 env->regs[R_ESP] = frame_addr;
865 env->eip = ka->_sa_handler;
866
867 cpu_x86_load_seg(env, R_DS, __USER_DS);
868 cpu_x86_load_seg(env, R_ES, __USER_DS);
869 cpu_x86_load_seg(env, R_SS, __USER_DS);
870 cpu_x86_load_seg(env, R_CS, __USER_CS);
871 env->eflags &= ~TF_MASK;
872
873 unlock_user_struct(frame, frame_addr, 1);
874
875 return;
876
877 give_sigsegv:
878 unlock_user_struct(frame, frame_addr, 1);
879 if (sig == TARGET_SIGSEGV)
880 ka->_sa_handler = TARGET_SIG_DFL;
881 force_sig(TARGET_SIGSEGV /* , current */);
882 }
883
884 /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
885 static void setup_rt_frame(int sig, struct target_sigaction *ka,
886 target_siginfo_t *info,
887 target_sigset_t *set, CPUX86State *env)
888 {
889 abi_ulong frame_addr, addr;
890 struct rt_sigframe *frame;
891 int i, err = 0;
892
893 frame_addr = get_sigframe(ka, env, sizeof(*frame));
894
895 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
896 goto give_sigsegv;
897
898 err |= __put_user(current_exec_domain_sig(sig),
899 &frame->sig);
900 addr = frame_addr + offsetof(struct rt_sigframe, info);
901 err |= __put_user(addr, &frame->pinfo);
902 addr = frame_addr + offsetof(struct rt_sigframe, uc);
903 err |= __put_user(addr, &frame->puc);
904 err |= copy_siginfo_to_user(&frame->info, info);
905 if (err)
906 goto give_sigsegv;
907
908 /* Create the ucontext. */
909 err |= __put_user(0, &frame->uc.tuc_flags);
910 err |= __put_user(0, &frame->uc.tuc_link);
911 err |= __put_user(target_sigaltstack_used.ss_sp,
912 &frame->uc.tuc_stack.ss_sp);
913 err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
914 &frame->uc.tuc_stack.ss_flags);
915 err |= __put_user(target_sigaltstack_used.ss_size,
916 &frame->uc.tuc_stack.ss_size);
917 err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
918 env, set->sig[0],
919 frame_addr + offsetof(struct rt_sigframe, fpstate));
920 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
921 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
922 goto give_sigsegv;
923 }
924
925 /* Set up to return from userspace. If provided, use a stub
926 already in userspace. */
927 if (ka->sa_flags & TARGET_SA_RESTORER) {
928 err |= __put_user(ka->sa_restorer, &frame->pretcode);
929 } else {
930 uint16_t val16;
931 addr = frame_addr + offsetof(struct rt_sigframe, retcode);
932 err |= __put_user(addr, &frame->pretcode);
933 /* This is movl $,%eax ; int $0x80 */
934 err |= __put_user(0xb8, (char *)(frame->retcode+0));
935 err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
936 val16 = 0x80cd;
937 err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
938 }
939
940 if (err)
941 goto give_sigsegv;
942
943 /* Set up registers for signal handler */
944 env->regs[R_ESP] = frame_addr;
945 env->eip = ka->_sa_handler;
946
947 cpu_x86_load_seg(env, R_DS, __USER_DS);
948 cpu_x86_load_seg(env, R_ES, __USER_DS);
949 cpu_x86_load_seg(env, R_SS, __USER_DS);
950 cpu_x86_load_seg(env, R_CS, __USER_CS);
951 env->eflags &= ~TF_MASK;
952
953 unlock_user_struct(frame, frame_addr, 1);
954
955 return;
956
957 give_sigsegv:
958 unlock_user_struct(frame, frame_addr, 1);
959 if (sig == TARGET_SIGSEGV)
960 ka->_sa_handler = TARGET_SIG_DFL;
961 force_sig(TARGET_SIGSEGV /* , current */);
962 }
963
964 static int
965 restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
966 {
967 unsigned int err = 0;
968 abi_ulong fpstate_addr;
969 unsigned int tmpflags;
970
971 cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
972 cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
973 cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
974 cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
975
976 env->regs[R_EDI] = tswapl(sc->edi);
977 env->regs[R_ESI] = tswapl(sc->esi);
978 env->regs[R_EBP] = tswapl(sc->ebp);
979 env->regs[R_ESP] = tswapl(sc->esp);
980 env->regs[R_EBX] = tswapl(sc->ebx);
981 env->regs[R_EDX] = tswapl(sc->edx);
982 env->regs[R_ECX] = tswapl(sc->ecx);
983 env->eip = tswapl(sc->eip);
984
985 cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
986 cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
987
988 tmpflags = tswapl(sc->eflags);
989 env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
990 // regs->orig_eax = -1; /* disable syscall checks */
991
992 fpstate_addr = tswapl(sc->fpstate);
993 if (fpstate_addr != 0) {
994 if (!access_ok(VERIFY_READ, fpstate_addr,
995 sizeof(struct target_fpstate)))
996 goto badframe;
997 cpu_x86_frstor(env, fpstate_addr, 1);
998 }
999
1000 *peax = tswapl(sc->eax);
1001 return err;
1002 badframe:
1003 return 1;
1004 }
1005
1006 long do_sigreturn(CPUX86State *env)
1007 {
1008 struct sigframe *frame;
1009 abi_ulong frame_addr = env->regs[R_ESP] - 8;
1010 target_sigset_t target_set;
1011 sigset_t set;
1012 int eax, i;
1013
1014 #if defined(DEBUG_SIGNAL)
1015 fprintf(stderr, "do_sigreturn\n");
1016 #endif
1017 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1018 goto badframe;
1019 /* set blocked signals */
1020 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
1021 goto badframe;
1022 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1023 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
1024 goto badframe;
1025 }
1026
1027 target_to_host_sigset_internal(&set, &target_set);
1028 sigprocmask(SIG_SETMASK, &set, NULL);
1029
1030 /* restore registers */
1031 if (restore_sigcontext(env, &frame->sc, &eax))
1032 goto badframe;
1033 unlock_user_struct(frame, frame_addr, 0);
1034 return eax;
1035
1036 badframe:
1037 unlock_user_struct(frame, frame_addr, 0);
1038 force_sig(TARGET_SIGSEGV);
1039 return 0;
1040 }
1041
1042 long do_rt_sigreturn(CPUX86State *env)
1043 {
1044 abi_ulong frame_addr;
1045 struct rt_sigframe *frame;
1046 sigset_t set;
1047 int eax;
1048
1049 frame_addr = env->regs[R_ESP] - 4;
1050 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1051 goto badframe;
1052 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
1053 sigprocmask(SIG_SETMASK, &set, NULL);
1054
1055 if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
1056 goto badframe;
1057
1058 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
1059 get_sp_from_cpustate(env)) == -EFAULT)
1060 goto badframe;
1061
1062 unlock_user_struct(frame, frame_addr, 0);
1063 return eax;
1064
1065 badframe:
1066 unlock_user_struct(frame, frame_addr, 0);
1067 force_sig(TARGET_SIGSEGV);
1068 return 0;
1069 }
1070
1071 #elif defined(TARGET_ARM)
1072
1073 struct target_sigcontext {
1074 abi_ulong trap_no;
1075 abi_ulong error_code;
1076 abi_ulong oldmask;
1077 abi_ulong arm_r0;
1078 abi_ulong arm_r1;
1079 abi_ulong arm_r2;
1080 abi_ulong arm_r3;
1081 abi_ulong arm_r4;
1082 abi_ulong arm_r5;
1083 abi_ulong arm_r6;
1084 abi_ulong arm_r7;
1085 abi_ulong arm_r8;
1086 abi_ulong arm_r9;
1087 abi_ulong arm_r10;
1088 abi_ulong arm_fp;
1089 abi_ulong arm_ip;
1090 abi_ulong arm_sp;
1091 abi_ulong arm_lr;
1092 abi_ulong arm_pc;
1093 abi_ulong arm_cpsr;
1094 abi_ulong fault_address;
1095 };
1096
1097 struct target_ucontext_v1 {
1098 abi_ulong tuc_flags;
1099 abi_ulong tuc_link;
1100 target_stack_t tuc_stack;
1101 struct target_sigcontext tuc_mcontext;
1102 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1103 };
1104
1105 struct target_ucontext_v2 {
1106 abi_ulong tuc_flags;
1107 abi_ulong tuc_link;
1108 target_stack_t tuc_stack;
1109 struct target_sigcontext tuc_mcontext;
1110 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1111 char __unused[128 - sizeof(target_sigset_t)];
1112 abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
1113 };
1114
1115 struct target_user_vfp {
1116 uint64_t fpregs[32];
1117 abi_ulong fpscr;
1118 };
1119
1120 struct target_user_vfp_exc {
1121 abi_ulong fpexc;
1122 abi_ulong fpinst;
1123 abi_ulong fpinst2;
1124 };
1125
1126 struct target_vfp_sigframe {
1127 abi_ulong magic;
1128 abi_ulong size;
1129 struct target_user_vfp ufp;
1130 struct target_user_vfp_exc ufp_exc;
1131 } __attribute__((__aligned__(8)));
1132
1133 struct target_iwmmxt_sigframe {
1134 abi_ulong magic;
1135 abi_ulong size;
1136 uint64_t regs[16];
1137 /* Note that not all the coprocessor control registers are stored here */
1138 uint32_t wcssf;
1139 uint32_t wcasf;
1140 uint32_t wcgr0;
1141 uint32_t wcgr1;
1142 uint32_t wcgr2;
1143 uint32_t wcgr3;
1144 } __attribute__((__aligned__(8)));
1145
1146 #define TARGET_VFP_MAGIC 0x56465001
1147 #define TARGET_IWMMXT_MAGIC 0x12ef842a
1148
1149 struct sigframe_v1
1150 {
1151 struct target_sigcontext sc;
1152 abi_ulong extramask[TARGET_NSIG_WORDS-1];
1153 abi_ulong retcode;
1154 };
1155
1156 struct sigframe_v2
1157 {
1158 struct target_ucontext_v2 uc;
1159 abi_ulong retcode;
1160 };
1161
1162 struct rt_sigframe_v1
1163 {
1164 abi_ulong pinfo;
1165 abi_ulong puc;
1166 struct target_siginfo info;
1167 struct target_ucontext_v1 uc;
1168 abi_ulong retcode;
1169 };
1170
1171 struct rt_sigframe_v2
1172 {
1173 struct target_siginfo info;
1174 struct target_ucontext_v2 uc;
1175 abi_ulong retcode;
1176 };
1177
1178 #define TARGET_CONFIG_CPU_32 1
1179
1180 /*
1181 * For ARM syscalls, we encode the syscall number into the instruction.
1182 */
1183 #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
1184 #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
1185
1186 /*
1187 * For Thumb syscalls, we pass the syscall number via r7. We therefore
1188 * need two 16-bit instructions.
1189 */
1190 #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
1191 #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
1192
1193 static const abi_ulong retcodes[4] = {
1194 SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
1195 SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
1196 };
1197
1198
1199 #define __get_user_error(x,p,e) __get_user(x, p)
1200
1201 static inline int valid_user_regs(CPUState *regs)
1202 {
1203 return 1;
1204 }
1205
1206 static void
1207 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1208 CPUState *env, abi_ulong mask)
1209 {
1210 __put_user(env->regs[0], &sc->arm_r0);
1211 __put_user(env->regs[1], &sc->arm_r1);
1212 __put_user(env->regs[2], &sc->arm_r2);
1213 __put_user(env->regs[3], &sc->arm_r3);
1214 __put_user(env->regs[4], &sc->arm_r4);
1215 __put_user(env->regs[5], &sc->arm_r5);
1216 __put_user(env->regs[6], &sc->arm_r6);
1217 __put_user(env->regs[7], &sc->arm_r7);
1218 __put_user(env->regs[8], &sc->arm_r8);
1219 __put_user(env->regs[9], &sc->arm_r9);
1220 __put_user(env->regs[10], &sc->arm_r10);
1221 __put_user(env->regs[11], &sc->arm_fp);
1222 __put_user(env->regs[12], &sc->arm_ip);
1223 __put_user(env->regs[13], &sc->arm_sp);
1224 __put_user(env->regs[14], &sc->arm_lr);
1225 __put_user(env->regs[15], &sc->arm_pc);
1226 #ifdef TARGET_CONFIG_CPU_32
1227 __put_user(cpsr_read(env), &sc->arm_cpsr);
1228 #endif
1229
1230 __put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
1231 __put_user(/* current->thread.error_code */ 0, &sc->error_code);
1232 __put_user(/* current->thread.address */ 0, &sc->fault_address);
1233 __put_user(mask, &sc->oldmask);
1234 }
1235
1236 static inline abi_ulong
1237 get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize)
1238 {
1239 unsigned long sp = regs->regs[13];
1240
1241 /*
1242 * This is the X/Open sanctioned signal stack switching.
1243 */
1244 if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
1245 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1246 /*
1247 * ATPCS B01 mandates 8-byte alignment
1248 */
1249 return (sp - framesize) & ~7;
1250 }
1251
1252 static int
1253 setup_return(CPUState *env, struct target_sigaction *ka,
1254 abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
1255 {
1256 abi_ulong handler = ka->_sa_handler;
1257 abi_ulong retcode;
1258 int thumb = handler & 1;
1259 uint32_t cpsr = cpsr_read(env);
1260
1261 cpsr &= ~CPSR_IT;
1262 if (thumb) {
1263 cpsr |= CPSR_T;
1264 } else {
1265 cpsr &= ~CPSR_T;
1266 }
1267
1268 if (ka->sa_flags & TARGET_SA_RESTORER) {
1269 retcode = ka->sa_restorer;
1270 } else {
1271 unsigned int idx = thumb;
1272
1273 if (ka->sa_flags & TARGET_SA_SIGINFO)
1274 idx += 2;
1275
1276 if (__put_user(retcodes[idx], rc))
1277 return 1;
1278 #if 0
1279 flush_icache_range((abi_ulong)rc,
1280 (abi_ulong)(rc + 1));
1281 #endif
1282 retcode = rc_addr + thumb;
1283 }
1284
1285 env->regs[0] = usig;
1286 env->regs[13] = frame_addr;
1287 env->regs[14] = retcode;
1288 env->regs[15] = handler & (thumb ? ~1 : ~3);
1289 cpsr_write(env, cpsr, 0xffffffff);
1290
1291 return 0;
1292 }
1293
1294 static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUState *env)
1295 {
1296 int i;
1297 struct target_vfp_sigframe *vfpframe;
1298 vfpframe = (struct target_vfp_sigframe *)regspace;
1299 __put_user(TARGET_VFP_MAGIC, &vfpframe->magic);
1300 __put_user(sizeof(*vfpframe), &vfpframe->size);
1301 for (i = 0; i < 32; i++) {
1302 __put_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]);
1303 }
1304 __put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr);
1305 __put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc);
1306 __put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
1307 __put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
1308 return (abi_ulong*)(vfpframe+1);
1309 }
1310
1311 static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace, CPUState *env)
1312 {
1313 int i;
1314 struct target_iwmmxt_sigframe *iwmmxtframe;
1315 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
1316 __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic);
1317 __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size);
1318 for (i = 0; i < 16; i++) {
1319 __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
1320 }
1321 __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
1322 __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
1323 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
1324 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
1325 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
1326 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
1327 return (abi_ulong*)(iwmmxtframe+1);
1328 }
1329
1330 static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
1331 target_sigset_t *set, CPUState *env)
1332 {
1333 struct target_sigaltstack stack;
1334 int i;
1335 abi_ulong *regspace;
1336
1337 /* Clear all the bits of the ucontext we don't use. */
1338 memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
1339
1340 memset(&stack, 0, sizeof(stack));
1341 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1342 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1343 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1344 memcpy(&uc->tuc_stack, &stack, sizeof(stack));
1345
1346 setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
1347 /* Save coprocessor signal frame. */
1348 regspace = uc->tuc_regspace;
1349 if (arm_feature(env, ARM_FEATURE_VFP)) {
1350 regspace = setup_sigframe_v2_vfp(regspace, env);
1351 }
1352 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
1353 regspace = setup_sigframe_v2_iwmmxt(regspace, env);
1354 }
1355
1356 /* Write terminating magic word */
1357 __put_user(0, regspace);
1358
1359 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1360 __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
1361 }
1362 }
1363
1364 /* compare linux/arch/arm/kernel/signal.c:setup_frame() */
1365 static void setup_frame_v1(int usig, struct target_sigaction *ka,
1366 target_sigset_t *set, CPUState *regs)
1367 {
1368 struct sigframe_v1 *frame;
1369 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1370 int i;
1371
1372 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1373 return;
1374
1375 setup_sigcontext(&frame->sc, regs, set->sig[0]);
1376
1377 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1378 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
1379 goto end;
1380 }
1381
1382 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1383 frame_addr + offsetof(struct sigframe_v1, retcode));
1384
1385 end:
1386 unlock_user_struct(frame, frame_addr, 1);
1387 }
1388
1389 static void setup_frame_v2(int usig, struct target_sigaction *ka,
1390 target_sigset_t *set, CPUState *regs)
1391 {
1392 struct sigframe_v2 *frame;
1393 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1394
1395 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1396 return;
1397
1398 setup_sigframe_v2(&frame->uc, set, regs);
1399
1400 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1401 frame_addr + offsetof(struct sigframe_v2, retcode));
1402
1403 unlock_user_struct(frame, frame_addr, 1);
1404 }
1405
1406 static void setup_frame(int usig, struct target_sigaction *ka,
1407 target_sigset_t *set, CPUState *regs)
1408 {
1409 if (get_osversion() >= 0x020612) {
1410 setup_frame_v2(usig, ka, set, regs);
1411 } else {
1412 setup_frame_v1(usig, ka, set, regs);
1413 }
1414 }
1415
1416 /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
1417 static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
1418 target_siginfo_t *info,
1419 target_sigset_t *set, CPUState *env)
1420 {
1421 struct rt_sigframe_v1 *frame;
1422 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1423 struct target_sigaltstack stack;
1424 int i;
1425 abi_ulong info_addr, uc_addr;
1426
1427 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1428 return /* 1 */;
1429
1430 info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
1431 __put_user(info_addr, &frame->pinfo);
1432 uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
1433 __put_user(uc_addr, &frame->puc);
1434 copy_siginfo_to_user(&frame->info, info);
1435
1436 /* Clear all the bits of the ucontext we don't use. */
1437 memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
1438
1439 memset(&stack, 0, sizeof(stack));
1440 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1441 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1442 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1443 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
1444
1445 setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
1446 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1447 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
1448 goto end;
1449 }
1450
1451 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1452 frame_addr + offsetof(struct rt_sigframe_v1, retcode));
1453
1454 env->regs[1] = info_addr;
1455 env->regs[2] = uc_addr;
1456
1457 end:
1458 unlock_user_struct(frame, frame_addr, 1);
1459 }
1460
1461 static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
1462 target_siginfo_t *info,
1463 target_sigset_t *set, CPUState *env)
1464 {
1465 struct rt_sigframe_v2 *frame;
1466 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1467 abi_ulong info_addr, uc_addr;
1468
1469 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1470 return /* 1 */;
1471
1472 info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
1473 uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
1474 copy_siginfo_to_user(&frame->info, info);
1475
1476 setup_sigframe_v2(&frame->uc, set, env);
1477
1478 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1479 frame_addr + offsetof(struct rt_sigframe_v2, retcode));
1480
1481 env->regs[1] = info_addr;
1482 env->regs[2] = uc_addr;
1483
1484 unlock_user_struct(frame, frame_addr, 1);
1485 }
1486
1487 static void setup_rt_frame(int usig, struct target_sigaction *ka,
1488 target_siginfo_t *info,
1489 target_sigset_t *set, CPUState *env)
1490 {
1491 if (get_osversion() >= 0x020612) {
1492 setup_rt_frame_v2(usig, ka, info, set, env);
1493 } else {
1494 setup_rt_frame_v1(usig, ka, info, set, env);
1495 }
1496 }
1497
1498 static int
1499 restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
1500 {
1501 int err = 0;
1502 uint32_t cpsr;
1503
1504 __get_user_error(env->regs[0], &sc->arm_r0, err);
1505 __get_user_error(env->regs[1], &sc->arm_r1, err);
1506 __get_user_error(env->regs[2], &sc->arm_r2, err);
1507 __get_user_error(env->regs[3], &sc->arm_r3, err);
1508 __get_user_error(env->regs[4], &sc->arm_r4, err);
1509 __get_user_error(env->regs[5], &sc->arm_r5, err);
1510 __get_user_error(env->regs[6], &sc->arm_r6, err);
1511 __get_user_error(env->regs[7], &sc->arm_r7, err);
1512 __get_user_error(env->regs[8], &sc->arm_r8, err);
1513 __get_user_error(env->regs[9], &sc->arm_r9, err);
1514 __get_user_error(env->regs[10], &sc->arm_r10, err);
1515 __get_user_error(env->regs[11], &sc->arm_fp, err);
1516 __get_user_error(env->regs[12], &sc->arm_ip, err);
1517 __get_user_error(env->regs[13], &sc->arm_sp, err);
1518 __get_user_error(env->regs[14], &sc->arm_lr, err);
1519 __get_user_error(env->regs[15], &sc->arm_pc, err);
1520 #ifdef TARGET_CONFIG_CPU_32
1521 __get_user_error(cpsr, &sc->arm_cpsr, err);
1522 cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC);
1523 #endif
1524
1525 err |= !valid_user_regs(env);
1526
1527 return err;
1528 }
1529
1530 static long do_sigreturn_v1(CPUState *env)
1531 {
1532 abi_ulong frame_addr;
1533 struct sigframe_v1 *frame;
1534 target_sigset_t set;
1535 sigset_t host_set;
1536 int i;
1537
1538 /*
1539 * Since we stacked the signal on a 64-bit boundary,
1540 * then 'sp' should be word aligned here. If it's
1541 * not, then the user is trying to mess with us.
1542 */
1543 if (env->regs[13] & 7)
1544 goto badframe;
1545
1546 frame_addr = env->regs[13];
1547 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1548 goto badframe;
1549
1550 if (__get_user(set.sig[0], &frame->sc.oldmask))
1551 goto badframe;
1552 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1553 if (__get_user(set.sig[i], &frame->extramask[i - 1]))
1554 goto badframe;
1555 }
1556
1557 target_to_host_sigset_internal(&host_set, &set);
1558 sigprocmask(SIG_SETMASK, &host_set, NULL);
1559
1560 if (restore_sigcontext(env, &frame->sc))
1561 goto badframe;
1562
1563 #if 0
1564 /* Send SIGTRAP if we're single-stepping */
1565 if (ptrace_cancel_bpt(current))
1566 send_sig(SIGTRAP, current, 1);
1567 #endif
1568 unlock_user_struct(frame, frame_addr, 0);
1569 return env->regs[0];
1570
1571 badframe:
1572 unlock_user_struct(frame, frame_addr, 0);
1573 force_sig(TARGET_SIGSEGV /* , current */);
1574 return 0;
1575 }
1576
1577 static abi_ulong *restore_sigframe_v2_vfp(CPUState *env, abi_ulong *regspace)
1578 {
1579 int i;
1580 abi_ulong magic, sz;
1581 uint32_t fpscr, fpexc;
1582 struct target_vfp_sigframe *vfpframe;
1583 vfpframe = (struct target_vfp_sigframe *)regspace;
1584
1585 __get_user(magic, &vfpframe->magic);
1586 __get_user(sz, &vfpframe->size);
1587 if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) {
1588 return 0;
1589 }
1590 for (i = 0; i < 32; i++) {
1591 __get_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]);
1592 }
1593 __get_user(fpscr, &vfpframe->ufp.fpscr);
1594 vfp_set_fpscr(env, fpscr);
1595 __get_user(fpexc, &vfpframe->ufp_exc.fpexc);
1596 /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid
1597 * and the exception flag is cleared
1598 */
1599 fpexc |= (1 << 30);
1600 fpexc &= ~((1 << 31) | (1 << 28));
1601 env->vfp.xregs[ARM_VFP_FPEXC] = fpexc;
1602 __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
1603 __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
1604 return (abi_ulong*)(vfpframe + 1);
1605 }
1606
1607 static abi_ulong *restore_sigframe_v2_iwmmxt(CPUState *env, abi_ulong *regspace)
1608 {
1609 int i;
1610 abi_ulong magic, sz;
1611 struct target_iwmmxt_sigframe *iwmmxtframe;
1612 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
1613
1614 __get_user(magic, &iwmmxtframe->magic);
1615 __get_user(sz, &iwmmxtframe->size);
1616 if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) {
1617 return 0;
1618 }
1619 for (i = 0; i < 16; i++) {
1620 __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
1621 }
1622 __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
1623 __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
1624 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
1625 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
1626 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
1627 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
1628 return (abi_ulong*)(iwmmxtframe + 1);
1629 }
1630
1631 static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr,
1632 struct target_ucontext_v2 *uc)
1633 {
1634 sigset_t host_set;
1635 abi_ulong *regspace;
1636
1637 target_to_host_sigset(&host_set, &uc->tuc_sigmask);
1638 sigprocmask(SIG_SETMASK, &host_set, NULL);
1639
1640 if (restore_sigcontext(env, &uc->tuc_mcontext))
1641 return 1;
1642
1643 /* Restore coprocessor signal frame */
1644 regspace = uc->tuc_regspace;
1645 if (arm_feature(env, ARM_FEATURE_VFP)) {
1646 regspace = restore_sigframe_v2_vfp(env, regspace);
1647 if (!regspace) {
1648 return 1;
1649 }
1650 }
1651 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
1652 regspace = restore_sigframe_v2_iwmmxt(env, regspace);
1653 if (!regspace) {
1654 return 1;
1655 }
1656 }
1657
1658 if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1659 return 1;
1660
1661 #if 0
1662 /* Send SIGTRAP if we're single-stepping */
1663 if (ptrace_cancel_bpt(current))
1664 send_sig(SIGTRAP, current, 1);
1665 #endif
1666
1667 return 0;
1668 }
1669
1670 static long do_sigreturn_v2(CPUState *env)
1671 {
1672 abi_ulong frame_addr;
1673 struct sigframe_v2 *frame;
1674
1675 /*
1676 * Since we stacked the signal on a 64-bit boundary,
1677 * then 'sp' should be word aligned here. If it's
1678 * not, then the user is trying to mess with us.
1679 */
1680 if (env->regs[13] & 7)
1681 goto badframe;
1682
1683 frame_addr = env->regs[13];
1684 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1685 goto badframe;
1686
1687 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1688 goto badframe;
1689
1690 unlock_user_struct(frame, frame_addr, 0);
1691 return env->regs[0];
1692
1693 badframe:
1694 unlock_user_struct(frame, frame_addr, 0);
1695 force_sig(TARGET_SIGSEGV /* , current */);
1696 return 0;
1697 }
1698
1699 long do_sigreturn(CPUState *env)
1700 {
1701 if (get_osversion() >= 0x020612) {
1702 return do_sigreturn_v2(env);
1703 } else {
1704 return do_sigreturn_v1(env);
1705 }
1706 }
1707
1708 static long do_rt_sigreturn_v1(CPUState *env)
1709 {
1710 abi_ulong frame_addr;
1711 struct rt_sigframe_v1 *frame;
1712 sigset_t host_set;
1713
1714 /*
1715 * Since we stacked the signal on a 64-bit boundary,
1716 * then 'sp' should be word aligned here. If it's
1717 * not, then the user is trying to mess with us.
1718 */
1719 if (env->regs[13] & 7)
1720 goto badframe;
1721
1722 frame_addr = env->regs[13];
1723 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1724 goto badframe;
1725
1726 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
1727 sigprocmask(SIG_SETMASK, &host_set, NULL);
1728
1729 if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
1730 goto badframe;
1731
1732 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1733 goto badframe;
1734
1735 #if 0
1736 /* Send SIGTRAP if we're single-stepping */
1737 if (ptrace_cancel_bpt(current))
1738 send_sig(SIGTRAP, current, 1);
1739 #endif
1740 unlock_user_struct(frame, frame_addr, 0);
1741 return env->regs[0];
1742
1743 badframe:
1744 unlock_user_struct(frame, frame_addr, 0);
1745 force_sig(TARGET_SIGSEGV /* , current */);
1746 return 0;
1747 }
1748
1749 static long do_rt_sigreturn_v2(CPUState *env)
1750 {
1751 abi_ulong frame_addr;
1752 struct rt_sigframe_v2 *frame;
1753
1754 /*
1755 * Since we stacked the signal on a 64-bit boundary,
1756 * then 'sp' should be word aligned here. If it's
1757 * not, then the user is trying to mess with us.
1758 */
1759 if (env->regs[13] & 7)
1760 goto badframe;
1761
1762 frame_addr = env->regs[13];
1763 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1764 goto badframe;
1765
1766 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1767 goto badframe;
1768
1769 unlock_user_struct(frame, frame_addr, 0);
1770 return env->regs[0];
1771
1772 badframe:
1773 unlock_user_struct(frame, frame_addr, 0);
1774 force_sig(TARGET_SIGSEGV /* , current */);
1775 return 0;
1776 }
1777
1778 long do_rt_sigreturn(CPUState *env)
1779 {
1780 if (get_osversion() >= 0x020612) {
1781 return do_rt_sigreturn_v2(env);
1782 } else {
1783 return do_rt_sigreturn_v1(env);
1784 }
1785 }
1786
1787 #elif defined(TARGET_SPARC)
1788
1789 #define __SUNOS_MAXWIN 31
1790
1791 /* This is what SunOS does, so shall I. */
1792 struct target_sigcontext {
1793 abi_ulong sigc_onstack; /* state to restore */
1794
1795 abi_ulong sigc_mask; /* sigmask to restore */
1796 abi_ulong sigc_sp; /* stack pointer */
1797 abi_ulong sigc_pc; /* program counter */
1798 abi_ulong sigc_npc; /* next program counter */
1799 abi_ulong sigc_psr; /* for condition codes etc */
1800 abi_ulong sigc_g1; /* User uses these two registers */
1801 abi_ulong sigc_o0; /* within the trampoline code. */
1802
1803 /* Now comes information regarding the users window set
1804 * at the time of the signal.
1805 */
1806 abi_ulong sigc_oswins; /* outstanding windows */
1807
1808 /* stack ptrs for each regwin buf */
1809 char *sigc_spbuf[__SUNOS_MAXWIN];
1810
1811 /* Windows to restore after signal */
1812 struct {
1813 abi_ulong locals[8];
1814 abi_ulong ins[8];
1815 } sigc_wbuf[__SUNOS_MAXWIN];
1816 };
1817 /* A Sparc stack frame */
1818 struct sparc_stackf {
1819 abi_ulong locals[8];
1820 abi_ulong ins[8];
1821 /* It's simpler to treat fp and callers_pc as elements of ins[]
1822 * since we never need to access them ourselves.
1823 */
1824 char *structptr;
1825 abi_ulong xargs[6];
1826 abi_ulong xxargs[1];
1827 };
1828
1829 typedef struct {
1830 struct {
1831 abi_ulong psr;
1832 abi_ulong pc;
1833 abi_ulong npc;
1834 abi_ulong y;
1835 abi_ulong u_regs[16]; /* globals and ins */
1836 } si_regs;
1837 int si_mask;
1838 } __siginfo_t;
1839
1840 typedef struct {
1841 unsigned long si_float_regs [32];
1842 unsigned long si_fsr;
1843 unsigned long si_fpqdepth;
1844 struct {
1845 unsigned long *insn_addr;
1846 unsigned long insn;
1847 } si_fpqueue [16];
1848 } qemu_siginfo_fpu_t;
1849
1850
1851 struct target_signal_frame {
1852 struct sparc_stackf ss;
1853 __siginfo_t info;
1854 abi_ulong fpu_save;
1855 abi_ulong insns[2] __attribute__ ((aligned (8)));
1856 abi_ulong extramask[TARGET_NSIG_WORDS - 1];
1857 abi_ulong extra_size; /* Should be 0 */
1858 qemu_siginfo_fpu_t fpu_state;
1859 };
1860 struct target_rt_signal_frame {
1861 struct sparc_stackf ss;
1862 siginfo_t info;
1863 abi_ulong regs[20];
1864 sigset_t mask;
1865 abi_ulong fpu_save;
1866 unsigned int insns[2];
1867 stack_t stack;
1868 unsigned int extra_size; /* Should be 0 */
1869 qemu_siginfo_fpu_t fpu_state;
1870 };
1871
1872 #define UREG_O0 16
1873 #define UREG_O6 22
1874 #define UREG_I0 0
1875 #define UREG_I1 1
1876 #define UREG_I2 2
1877 #define UREG_I3 3
1878 #define UREG_I4 4
1879 #define UREG_I5 5
1880 #define UREG_I6 6
1881 #define UREG_I7 7
1882 #define UREG_L0 8
1883 #define UREG_FP UREG_I6
1884 #define UREG_SP UREG_O6
1885
1886 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
1887 CPUState *env, unsigned long framesize)
1888 {
1889 abi_ulong sp;
1890
1891 sp = env->regwptr[UREG_FP];
1892
1893 /* This is the X/Open sanctioned signal stack switching. */
1894 if (sa->sa_flags & TARGET_SA_ONSTACK) {
1895 if (!on_sig_stack(sp)
1896 && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
1897 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1898 }
1899 return sp - framesize;
1900 }
1901
1902 static int
1903 setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask)
1904 {
1905 int err = 0, i;
1906
1907 err |= __put_user(env->psr, &si->si_regs.psr);
1908 err |= __put_user(env->pc, &si->si_regs.pc);
1909 err |= __put_user(env->npc, &si->si_regs.npc);
1910 err |= __put_user(env->y, &si->si_regs.y);
1911 for (i=0; i < 8; i++) {
1912 err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
1913 }
1914 for (i=0; i < 8; i++) {
1915 err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
1916 }
1917 err |= __put_user(mask, &si->si_mask);
1918 return err;
1919 }
1920
1921 #if 0
1922 static int
1923 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1924 CPUState *env, unsigned long mask)
1925 {
1926 int err = 0;
1927
1928 err |= __put_user(mask, &sc->sigc_mask);
1929 err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
1930 err |= __put_user(env->pc, &sc->sigc_pc);
1931 err |= __put_user(env->npc, &sc->sigc_npc);
1932 err |= __put_user(env->psr, &sc->sigc_psr);
1933 err |= __put_user(env->gregs[1], &sc->sigc_g1);
1934 err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
1935
1936 return err;
1937 }
1938 #endif
1939 #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
1940
1941 static void setup_frame(int sig, struct target_sigaction *ka,
1942 target_sigset_t *set, CPUState *env)
1943 {
1944 abi_ulong sf_addr;
1945 struct target_signal_frame *sf;
1946 int sigframe_size, err, i;
1947
1948 /* 1. Make sure everything is clean */
1949 //synchronize_user_stack();
1950
1951 sigframe_size = NF_ALIGNEDSZ;
1952 sf_addr = get_sigframe(ka, env, sigframe_size);
1953
1954 sf = lock_user(VERIFY_WRITE, sf_addr,
1955 sizeof(struct target_signal_frame), 0);
1956 if (!sf)
1957 goto sigsegv;
1958
1959 //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1960 #if 0
1961 if (invalid_frame_pointer(sf, sigframe_size))
1962 goto sigill_and_return;
1963 #endif
1964 /* 2. Save the current process state */
1965 err = setup___siginfo(&sf->info, env, set->sig[0]);
1966 err |= __put_user(0, &sf->extra_size);
1967
1968 //err |= save_fpu_state(regs, &sf->fpu_state);
1969 //err |= __put_user(&sf->fpu_state, &sf->fpu_save);
1970
1971 err |= __put_user(set->sig[0], &sf->info.si_mask);
1972 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
1973 err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
1974 }
1975
1976 for (i = 0; i < 8; i++) {
1977 err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
1978 }
1979 for (i = 0; i < 8; i++) {
1980 err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
1981 }
1982 if (err)
1983 goto sigsegv;
1984
1985 /* 3. signal handler back-trampoline and parameters */
1986 env->regwptr[UREG_FP] = sf_addr;
1987 env->regwptr[UREG_I0] = sig;
1988 env->regwptr[UREG_I1] = sf_addr +
1989 offsetof(struct target_signal_frame, info);
1990 env->regwptr[UREG_I2] = sf_addr +
1991 offsetof(struct target_signal_frame, info);
1992
1993 /* 4. signal handler */
1994 env->pc = ka->_sa_handler;
1995 env->npc = (env->pc + 4);
1996 /* 5. return to kernel instructions */
1997 if (ka->sa_restorer)
1998 env->regwptr[UREG_I7] = ka->sa_restorer;
1999 else {
2000 uint32_t val32;
2001
2002 env->regwptr[UREG_I7] = sf_addr +
2003 offsetof(struct target_signal_frame, insns) - 2 * 4;
2004
2005 /* mov __NR_sigreturn, %g1 */
2006 val32 = 0x821020d8;
2007 err |= __put_user(val32, &sf->insns[0]);
2008
2009 /* t 0x10 */
2010 val32 = 0x91d02010;
2011 err |= __put_user(val32, &sf->insns[1]);
2012 if (err)
2013 goto sigsegv;
2014
2015 /* Flush instruction space. */
2016 //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
2017 // tb_flush(env);
2018 }
2019 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
2020 return;
2021 #if 0
2022 sigill_and_return:
2023 force_sig(TARGET_SIGILL);
2024 #endif
2025 sigsegv:
2026 //fprintf(stderr, "force_sig\n");
2027 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
2028 force_sig(TARGET_SIGSEGV);
2029 }
2030 static inline int
2031 restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu)
2032 {
2033 int err;
2034 #if 0
2035 #ifdef CONFIG_SMP
2036 if (current->flags & PF_USEDFPU)
2037 regs->psr &= ~PSR_EF;
2038 #else
2039 if (current == last_task_used_math) {
2040 last_task_used_math = 0;
2041 regs->psr &= ~PSR_EF;
2042 }
2043 #endif
2044 current->used_math = 1;
2045 current->flags &= ~PF_USEDFPU;
2046 #endif
2047 #if 0
2048 if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
2049 return -EFAULT;
2050 #endif
2051
2052 #if 0
2053 /* XXX: incorrect */
2054 err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
2055 (sizeof(unsigned long) * 32));
2056 #endif
2057 err |= __get_user(env->fsr, &fpu->si_fsr);
2058 #if 0
2059 err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
2060 if (current->thread.fpqdepth != 0)
2061 err |= __copy_from_user(&current->thread.fpqueue[0],
2062 &fpu->si_fpqueue[0],
2063 ((sizeof(unsigned long) +
2064 (sizeof(unsigned long *)))*16));
2065 #endif
2066 return err;
2067 }
2068
2069
2070 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2071 target_siginfo_t *info,
2072 target_sigset_t *set, CPUState *env)
2073 {
2074 fprintf(stderr, "setup_rt_frame: not implemented\n");
2075 }
2076
2077 long do_sigreturn(CPUState *env)
2078 {
2079 abi_ulong sf_addr;
2080 struct target_signal_frame *sf;
2081 uint32_t up_psr, pc, npc;
2082 target_sigset_t set;
2083 sigset_t host_set;
2084 abi_ulong fpu_save_addr;
2085 int err, i;
2086
2087 sf_addr = env->regwptr[UREG_FP];
2088 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1))
2089 goto segv_and_exit;
2090 #if 0
2091 fprintf(stderr, "sigreturn\n");
2092 fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
2093 #endif
2094 //cpu_dump_state(env, stderr, fprintf, 0);
2095
2096 /* 1. Make sure we are not getting garbage from the user */
2097
2098 if (sf_addr & 3)
2099 goto segv_and_exit;
2100
2101 err = __get_user(pc, &sf->info.si_regs.pc);
2102 err |= __get_user(npc, &sf->info.si_regs.npc);
2103
2104 if ((pc | npc) & 3)
2105 goto segv_and_exit;
2106
2107 /* 2. Restore the state */
2108 err |= __get_user(up_psr, &sf->info.si_regs.psr);
2109
2110 /* User can only change condition codes and FPU enabling in %psr. */
2111 env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
2112 | (env->psr & ~(PSR_ICC /* | PSR_EF */));
2113
2114 env->pc = pc;
2115 env->npc = npc;
2116 err |= __get_user(env->y, &sf->info.si_regs.y);
2117 for (i=0; i < 8; i++) {
2118 err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
2119 }
2120 for (i=0; i < 8; i++) {
2121 err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
2122 }
2123
2124 err |= __get_user(fpu_save_addr, &sf->fpu_save);
2125
2126 //if (fpu_save)
2127 // err |= restore_fpu_state(env, fpu_save);
2128
2129 /* This is pretty much atomic, no amount locking would prevent
2130 * the races which exist anyways.
2131 */
2132 err |= __get_user(set.sig[0], &sf->info.si_mask);
2133 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2134 err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
2135 }
2136
2137 target_to_host_sigset_internal(&host_set, &set);
2138 sigprocmask(SIG_SETMASK, &host_set, NULL);
2139
2140 if (err)
2141 goto segv_and_exit;
2142 unlock_user_struct(sf, sf_addr, 0);
2143 return env->regwptr[0];
2144
2145 segv_and_exit:
2146 unlock_user_struct(sf, sf_addr, 0);
2147 force_sig(TARGET_SIGSEGV);
2148 }
2149
2150 long do_rt_sigreturn(CPUState *env)
2151 {
2152 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2153 return -TARGET_ENOSYS;
2154 }
2155
2156 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
2157 #define MC_TSTATE 0
2158 #define MC_PC 1
2159 #define MC_NPC 2
2160 #define MC_Y 3
2161 #define MC_G1 4
2162 #define MC_G2 5
2163 #define MC_G3 6
2164 #define MC_G4 7
2165 #define MC_G5 8
2166 #define MC_G6 9
2167 #define MC_G7 10
2168 #define MC_O0 11
2169 #define MC_O1 12
2170 #define MC_O2 13
2171 #define MC_O3 14
2172 #define MC_O4 15
2173 #define MC_O5 16
2174 #define MC_O6 17
2175 #define MC_O7 18
2176 #define MC_NGREG 19
2177
2178 typedef abi_ulong target_mc_greg_t;
2179 typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
2180
2181 struct target_mc_fq {
2182 abi_ulong *mcfq_addr;
2183 uint32_t mcfq_insn;
2184 };
2185
2186 struct target_mc_fpu {
2187 union {
2188 uint32_t sregs[32];
2189 uint64_t dregs[32];
2190 //uint128_t qregs[16];
2191 } mcfpu_fregs;
2192 abi_ulong mcfpu_fsr;
2193 abi_ulong mcfpu_fprs;
2194 abi_ulong mcfpu_gsr;
2195 struct target_mc_fq *mcfpu_fq;
2196 unsigned char mcfpu_qcnt;
2197 unsigned char mcfpu_qentsz;
2198 unsigned char mcfpu_enab;
2199 };
2200 typedef struct target_mc_fpu target_mc_fpu_t;
2201
2202 typedef struct {
2203 target_mc_gregset_t mc_gregs;
2204 target_mc_greg_t mc_fp;
2205 target_mc_greg_t mc_i7;
2206 target_mc_fpu_t mc_fpregs;
2207 } target_mcontext_t;
2208
2209 struct target_ucontext {
2210 struct target_ucontext *tuc_link;
2211 abi_ulong tuc_flags;
2212 target_sigset_t tuc_sigmask;
2213 target_mcontext_t tuc_mcontext;
2214 };
2215
2216 /* A V9 register window */
2217 struct target_reg_window {
2218 abi_ulong locals[8];
2219 abi_ulong ins[8];
2220 };
2221
2222 #define TARGET_STACK_BIAS 2047
2223
2224 /* {set, get}context() needed for 64-bit SparcLinux userland. */
2225 void sparc64_set_context(CPUSPARCState *env)
2226 {
2227 abi_ulong ucp_addr;
2228 struct target_ucontext *ucp;
2229 target_mc_gregset_t *grp;
2230 abi_ulong pc, npc, tstate;
2231 abi_ulong fp, i7, w_addr;
2232 unsigned char fenab;
2233 int err;
2234 unsigned int i;
2235
2236 ucp_addr = env->regwptr[UREG_I0];
2237 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1))
2238 goto do_sigsegv;
2239 grp = &ucp->tuc_mcontext.mc_gregs;
2240 err = __get_user(pc, &((*grp)[MC_PC]));
2241 err |= __get_user(npc, &((*grp)[MC_NPC]));
2242 if (err || ((pc | npc) & 3))
2243 goto do_sigsegv;
2244 if (env->regwptr[UREG_I1]) {
2245 target_sigset_t target_set;
2246 sigset_t set;
2247
2248 if (TARGET_NSIG_WORDS == 1) {
2249 if (__get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0]))
2250 goto do_sigsegv;
2251 } else {
2252 abi_ulong *src, *dst;
2253 src = ucp->tuc_sigmask.sig;
2254 dst = target_set.sig;
2255 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2256 i++, dst++, src++)
2257 err |= __get_user(*dst, src);
2258 if (err)
2259 goto do_sigsegv;
2260 }
2261 target_to_host_sigset_internal(&set, &target_set);
2262 sigprocmask(SIG_SETMASK, &set, NULL);
2263 }
2264 env->pc = pc;
2265 env->npc = npc;
2266 err |= __get_user(env->y, &((*grp)[MC_Y]));
2267 err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
2268 env->asi = (tstate >> 24) & 0xff;
2269 cpu_put_ccr(env, tstate >> 32);
2270 cpu_put_cwp64(env, tstate & 0x1f);
2271 err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
2272 err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
2273 err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
2274 err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
2275 err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
2276 err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
2277 err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
2278 err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
2279 err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
2280 err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
2281 err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
2282 err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
2283 err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
2284 err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
2285 err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
2286
2287 err |= __get_user(fp, &(ucp->tuc_mcontext.mc_fp));
2288 err |= __get_user(i7, &(ucp->tuc_mcontext.mc_i7));
2289
2290 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2291 if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2292 abi_ulong) != 0)
2293 goto do_sigsegv;
2294 if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2295 abi_ulong) != 0)
2296 goto do_sigsegv;
2297 err |= __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab));
2298 err |= __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs));
2299 {
2300 uint32_t *src, *dst;
2301 src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2302 dst = env->fpr;
2303 /* XXX: check that the CPU storage is the same as user context */
2304 for (i = 0; i < 64; i++, dst++, src++)
2305 err |= __get_user(*dst, src);
2306 }
2307 err |= __get_user(env->fsr,
2308 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr));
2309 err |= __get_user(env->gsr,
2310 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr));
2311 if (err)
2312 goto do_sigsegv;
2313 unlock_user_struct(ucp, ucp_addr, 0);
2314 return;
2315 do_sigsegv:
2316 unlock_user_struct(ucp, ucp_addr, 0);
2317 force_sig(TARGET_SIGSEGV);
2318 }
2319
2320 void sparc64_get_context(CPUSPARCState *env)
2321 {
2322 abi_ulong ucp_addr;
2323 struct target_ucontext *ucp;
2324 target_mc_gregset_t *grp;
2325 target_mcontext_t *mcp;
2326 abi_ulong fp, i7, w_addr;
2327 int err;
2328 unsigned int i;
2329 target_sigset_t target_set;
2330 sigset_t set;
2331
2332 ucp_addr = env->regwptr[UREG_I0];
2333 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0))
2334 goto do_sigsegv;
2335
2336 mcp = &ucp->tuc_mcontext;
2337 grp = &mcp->mc_gregs;
2338
2339 /* Skip over the trap instruction, first. */
2340 env->pc = env->npc;
2341 env->npc += 4;
2342
2343 err = 0;
2344
2345 sigprocmask(0, NULL, &set);
2346 host_to_target_sigset_internal(&target_set, &set);
2347 if (TARGET_NSIG_WORDS == 1) {
2348 err |= __put_user(target_set.sig[0],
2349 (abi_ulong *)&ucp->tuc_sigmask);
2350 } else {
2351 abi_ulong *src, *dst;
2352 src = target_set.sig;
2353 dst = ucp->tuc_sigmask.sig;
2354 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2355 i++, dst++, src++)
2356 err |= __put_user(*src, dst);
2357 if (err)
2358 goto do_sigsegv;
2359 }
2360
2361 /* XXX: tstate must be saved properly */
2362 // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
2363 err |= __put_user(env->pc, &((*grp)[MC_PC]));
2364 err |= __put_user(env->npc, &((*grp)[MC_NPC]));
2365 err |= __put_user(env->y, &((*grp)[MC_Y]));
2366 err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
2367 err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
2368 err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
2369 err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
2370 err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
2371 err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
2372 err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
2373 err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
2374 err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
2375 err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
2376 err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
2377 err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
2378 err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
2379 err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
2380 err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
2381
2382 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2383 fp = i7 = 0;
2384 if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2385 abi_ulong) != 0)
2386 goto do_sigsegv;
2387 if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2388 abi_ulong) != 0)
2389 goto do_sigsegv;
2390 err |= __put_user(fp, &(mcp->mc_fp));
2391 err |= __put_user(i7, &(mcp->mc_i7));
2392
2393 {
2394 uint32_t *src, *dst;
2395 src = env->fpr;
2396 dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2397 /* XXX: check that the CPU storage is the same as user context */
2398 for (i = 0; i < 64; i++, dst++, src++)
2399 err |= __put_user(*src, dst);
2400 }
2401 err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
2402 err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
2403 err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
2404
2405 if (err)
2406 goto do_sigsegv;
2407 unlock_user_struct(ucp, ucp_addr, 1);
2408 return;
2409 do_sigsegv:
2410 unlock_user_struct(ucp, ucp_addr, 1);
2411 force_sig(TARGET_SIGSEGV);
2412 }
2413 #endif
2414 #elif defined(TARGET_ABI_MIPSN64)
2415
2416 # warning signal handling not implemented
2417
2418 static void setup_frame(int sig, struct target_sigaction *ka,
2419 target_sigset_t *set, CPUState *env)
2420 {
2421 fprintf(stderr, "setup_frame: not implemented\n");
2422 }
2423
2424 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2425 target_siginfo_t *info,
2426 target_sigset_t *set, CPUState *env)
2427 {
2428 fprintf(stderr, "setup_rt_frame: not implemented\n");
2429 }
2430
2431 long do_sigreturn(CPUState *env)
2432 {
2433 fprintf(stderr, "do_sigreturn: not implemented\n");
2434 return -TARGET_ENOSYS;
2435 }
2436
2437 long do_rt_sigreturn(CPUState *env)
2438 {
2439 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2440 return -TARGET_ENOSYS;
2441 }
2442
2443 #elif defined(TARGET_ABI_MIPSN32)
2444
2445 # warning signal handling not implemented
2446
2447 static void setup_frame(int sig, struct target_sigaction *ka,
2448 target_sigset_t *set, CPUState *env)
2449 {
2450 fprintf(stderr, "setup_frame: not implemented\n");
2451 }
2452
2453 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2454 target_siginfo_t *info,
2455 target_sigset_t *set, CPUState *env)
2456 {
2457 fprintf(stderr, "setup_rt_frame: not implemented\n");
2458 }
2459
2460 long do_sigreturn(CPUState *env)
2461 {
2462 fprintf(stderr, "do_sigreturn: not implemented\n");
2463 return -TARGET_ENOSYS;
2464 }
2465
2466 long do_rt_sigreturn(CPUState *env)
2467 {
2468 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2469 return -TARGET_ENOSYS;
2470 }
2471
2472 #elif defined(TARGET_ABI_MIPSO32)
2473
2474 struct target_sigcontext {
2475 uint32_t sc_regmask; /* Unused */
2476 uint32_t sc_status;
2477 uint64_t sc_pc;
2478 uint64_t sc_regs[32];
2479 uint64_t sc_fpregs[32];
2480 uint32_t sc_ownedfp; /* Unused */
2481 uint32_t sc_fpc_csr;
2482 uint32_t sc_fpc_eir; /* Unused */
2483 uint32_t sc_used_math;
2484 uint32_t sc_dsp; /* dsp status, was sc_ssflags */
2485 uint32_t pad0;
2486 uint64_t sc_mdhi;
2487 uint64_t sc_mdlo;
2488 target_ulong sc_hi1; /* Was sc_cause */
2489 target_ulong sc_lo1; /* Was sc_badvaddr */
2490 target_ulong sc_hi2; /* Was sc_sigset[4] */
2491 target_ulong sc_lo2;
2492 target_ulong sc_hi3;
2493 target_ulong sc_lo3;
2494 };
2495
2496 struct sigframe {
2497 uint32_t sf_ass[4]; /* argument save space for o32 */
2498 uint32_t sf_code[2]; /* signal trampoline */
2499 struct target_sigcontext sf_sc;
2500 target_sigset_t sf_mask;
2501 };
2502
2503 struct target_ucontext {
2504 target_ulong tuc_flags;
2505 target_ulong tuc_link;
2506 target_stack_t tuc_stack;
2507 target_ulong pad0;
2508 struct target_sigcontext tuc_mcontext;
2509 target_sigset_t tuc_sigmask;
2510 };
2511
2512 struct target_rt_sigframe {
2513 uint32_t rs_ass[4]; /* argument save space for o32 */
2514 uint32_t rs_code[2]; /* signal trampoline */
2515 struct target_siginfo rs_info;
2516 struct target_ucontext rs_uc;
2517 };
2518
2519 /* Install trampoline to jump back from signal handler */
2520 static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
2521 {
2522 int err;
2523
2524 /*
2525 * Set up the return code ...
2526 *
2527 * li v0, __NR__foo_sigreturn
2528 * syscall
2529 */
2530
2531 err = __put_user(0x24020000 + syscall, tramp + 0);
2532 err |= __put_user(0x0000000c , tramp + 1);
2533 /* flush_cache_sigtramp((unsigned long) tramp); */
2534 return err;
2535 }
2536
2537 static inline int
2538 setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2539 {
2540 int err = 0;
2541
2542 err |= __put_user(regs->active_tc.PC, &sc->sc_pc);
2543
2544 #define save_gp_reg(i) do { \
2545 err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
2546 } while(0)
2547 __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2);
2548 save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6);
2549 save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10);
2550 save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
2551 save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18);
2552 save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22);
2553 save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
2554 save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30);
2555 save_gp_reg(31);
2556 #undef save_gp_reg
2557
2558 err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2559 err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2560
2561 /* Not used yet, but might be useful if we ever have DSP suppport */
2562 #if 0
2563 if (cpu_has_dsp) {
2564 err |= __put_user(mfhi1(), &sc->sc_hi1);
2565 err |= __put_user(mflo1(), &sc->sc_lo1);
2566 err |= __put_user(mfhi2(), &sc->sc_hi2);
2567 err |= __put_user(mflo2(), &sc->sc_lo2);
2568 err |= __put_user(mfhi3(), &sc->sc_hi3);
2569 err |= __put_user(mflo3(), &sc->sc_lo3);
2570 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2571 }
2572 /* same with 64 bit */
2573 #ifdef CONFIG_64BIT
2574 err |= __put_user(regs->hi, &sc->sc_hi[0]);
2575 err |= __put_user(regs->lo, &sc->sc_lo[0]);
2576 if (cpu_has_dsp) {
2577 err |= __put_user(mfhi1(), &sc->sc_hi[1]);
2578 err |= __put_user(mflo1(), &sc->sc_lo[1]);
2579 err |= __put_user(mfhi2(), &sc->sc_hi[2]);
2580 err |= __put_user(mflo2(), &sc->sc_lo[2]);
2581 err |= __put_user(mfhi3(), &sc->sc_hi[3]);
2582 err |= __put_user(mflo3(), &sc->sc_lo[3]);
2583 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2584 }
2585 #endif
2586 #endif
2587
2588 #if 0
2589 err |= __put_user(!!used_math(), &sc->sc_used_math);
2590
2591 if (!used_math())
2592 goto out;
2593
2594 /*
2595 * Save FPU state to signal context. Signal handler will "inherit"
2596 * current FPU state.
2597 */
2598 preempt_disable();
2599
2600 if (!is_fpu_owner()) {
2601 own_fpu();
2602 restore_fp(current);
2603 }
2604 err |= save_fp_context(sc);
2605
2606 preempt_enable();
2607 out:
2608 #endif
2609 return err;
2610 }
2611
2612 static inline int
2613 restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2614 {
2615 int err = 0;
2616
2617 err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
2618
2619 err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2620 err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2621
2622 #define restore_gp_reg(i) do { \
2623 err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
2624 } while(0)
2625 restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3);
2626 restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6);
2627 restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9);
2628 restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12);
2629 restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15);
2630 restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18);
2631 restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21);
2632 restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24);
2633 restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27);
2634 restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30);
2635 restore_gp_reg(31);
2636 #undef restore_gp_reg
2637
2638 #if 0
2639 if (cpu_has_dsp) {
2640 err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
2641 err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
2642 err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
2643 err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
2644 err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
2645 err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
2646 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2647 }
2648 #ifdef CONFIG_64BIT
2649 err |= __get_user(regs->hi, &sc->sc_hi[0]);
2650 err |= __get_user(regs->lo, &sc->sc_lo[0]);
2651 if (cpu_has_dsp) {
2652 err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
2653 err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
2654 err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
2655 err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
2656 err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
2657 err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
2658 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2659 }
2660 #endif
2661
2662 err |= __get_user(used_math, &sc->sc_used_math);
2663 conditional_used_math(used_math);
2664
2665 preempt_disable();
2666
2667 if (used_math()) {
2668 /* restore fpu context if we have used it before */
2669 own_fpu();
2670 err |= restore_fp_context(sc);
2671 } else {
2672 /* signal handler may have used FPU. Give it up. */
2673 lose_fpu();
2674 }
2675
2676 preempt_enable();
2677 #endif
2678 return err;
2679 }
2680 /*
2681 * Determine which stack to use..
2682 */
2683 static inline abi_ulong
2684 get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
2685 {
2686 unsigned long sp;
2687
2688 /* Default to using normal stack */
2689 sp = regs->active_tc.gpr[29];
2690
2691 /*
2692 * FPU emulator may have it's own trampoline active just
2693 * above the user stack, 16-bytes before the next lowest
2694 * 16 byte boundary. Try to avoid trashing it.
2695 */
2696 sp -= 32;
2697
2698 /* This is the X/Open sanctioned signal stack switching. */
2699 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
2700 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2701 }
2702
2703 return (sp - frame_size) & ~7;
2704 }
2705
2706 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */
2707 static void setup_frame(int sig, struct target_sigaction * ka,
2708 target_sigset_t *set, CPUState *regs)
2709 {
2710 struct sigframe *frame;
2711 abi_ulong frame_addr;
2712 int i;
2713
2714 frame_addr = get_sigframe(ka, regs, sizeof(*frame));
2715 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2716 goto give_sigsegv;
2717
2718 install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
2719
2720 if(setup_sigcontext(regs, &frame->sf_sc))
2721 goto give_sigsegv;
2722
2723 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2724 if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
2725 goto give_sigsegv;
2726 }
2727
2728 /*
2729 * Arguments to signal handler:
2730 *
2731 * a0 = signal number
2732 * a1 = 0 (should be cause)
2733 * a2 = pointer to struct sigcontext
2734 *
2735 * $25 and PC point to the signal handler, $29 points to the
2736 * struct sigframe.
2737 */
2738 regs->active_tc.gpr[ 4] = sig;
2739 regs->active_tc.gpr[ 5] = 0;
2740 regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
2741 regs->active_tc.gpr[29] = frame_addr;
2742 regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
2743 /* The original kernel code sets CP0_EPC to the handler
2744 * since it returns to userland using eret
2745 * we cannot do this here, and we must set PC directly */
2746 regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
2747 unlock_user_struct(frame, frame_addr, 1);
2748 return;
2749
2750 give_sigsegv:
2751 unlock_user_struct(frame, frame_addr, 1);
2752 force_sig(TARGET_SIGSEGV/*, current*/);
2753 return;
2754 }
2755
2756 long do_sigreturn(CPUState *regs)
2757 {
2758 struct sigframe *frame;
2759 abi_ulong frame_addr;
2760 sigset_t blocked;
2761 target_sigset_t target_set;
2762 int i;
2763
2764 #if defined(DEBUG_SIGNAL)
2765 fprintf(stderr, "do_sigreturn\n");
2766 #endif
2767 frame_addr = regs->active_tc.gpr[29];
2768 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2769 goto badframe;
2770
2771 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2772 if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
2773 goto badframe;
2774 }
2775
2776 target_to_host_sigset_internal(&blocked, &target_set);
2777 sigprocmask(SIG_SETMASK, &blocked, NULL);
2778
2779 if (restore_sigcontext(regs, &frame->sf_sc))
2780 goto badframe;
2781
2782 #if 0
2783 /*
2784 * Don't let your children do this ...
2785 */
2786 __asm__ __volatile__(
2787 "move\t$29, %0\n\t"
2788 "j\tsyscall_exit"
2789 :/* no outputs */
2790 :"r" (&regs));
2791 /* Unreached */
2792 #endif
2793
2794 regs->active_tc.PC = regs->CP0_EPC;
2795 /* I am not sure this is right, but it seems to work
2796 * maybe a problem with nested signals ? */
2797 regs->CP0_EPC = 0;
2798 return -TARGET_QEMU_ESIGRETURN;
2799
2800 badframe:
2801 force_sig(TARGET_SIGSEGV/*, current*/);
2802 return 0;
2803 }
2804
2805 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2806 target_siginfo_t *info,
2807 target_sigset_t *set, CPUState *env)
2808 {
2809 struct target_rt_sigframe *frame;
2810 abi_ulong frame_addr;
2811 int i;
2812
2813 frame_addr = get_sigframe(ka, env, sizeof(*frame));
2814 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2815 goto give_sigsegv;
2816
2817 install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn);
2818
2819 copy_siginfo_to_user(&frame->rs_info, info);
2820
2821 __put_user(0, &frame->rs_uc.tuc_flags);
2822 __put_user(0, &frame->rs_uc.tuc_link);
2823 __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp);
2824 __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size);
2825 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
2826 &frame->rs_uc.tuc_stack.ss_flags);
2827
2828 setup_sigcontext(env, &frame->rs_uc.tuc_mcontext);
2829
2830 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2831 __put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]);
2832 }
2833
2834 /*
2835 * Arguments to signal handler:
2836 *
2837 * a0 = signal number
2838 * a1 = pointer to struct siginfo
2839 * a2 = pointer to struct ucontext
2840 *
2841 * $25 and PC point to the signal handler, $29 points to the
2842 * struct sigframe.
2843 */
2844 env->active_tc.gpr[ 4] = sig;
2845 env->active_tc.gpr[ 5] = frame_addr
2846 + offsetof(struct target_rt_sigframe, rs_info);
2847 env->active_tc.gpr[ 6] = frame_addr
2848 + offsetof(struct target_rt_sigframe, rs_uc);
2849 env->active_tc.gpr[29] = frame_addr;
2850 env->active_tc.gpr[31] = frame_addr
2851 + offsetof(struct target_rt_sigframe, rs_code);
2852 /* The original kernel code sets CP0_EPC to the handler
2853 * since it returns to userland using eret
2854 * we cannot do this here, and we must set PC directly */
2855 env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
2856 unlock_user_struct(frame, frame_addr, 1);
2857 return;
2858
2859 give_sigsegv:
2860 unlock_user_struct(frame, frame_addr, 1);
2861 force_sig(TARGET_SIGSEGV/*, current*/);
2862 return;
2863 }
2864
2865 long do_rt_sigreturn(CPUState *env)
2866 {
2867 struct target_rt_sigframe *frame;
2868 abi_ulong frame_addr;
2869 sigset_t blocked;
2870
2871 #if defined(DEBUG_SIGNAL)
2872 fprintf(stderr, "do_rt_sigreturn\n");
2873 #endif
2874 frame_addr = env->active_tc.gpr[29];
2875 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2876 goto badframe;
2877
2878 target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask);
2879 sigprocmask(SIG_SETMASK, &blocked, NULL);
2880
2881 if (restore_sigcontext(env, &frame->rs_uc.tuc_mcontext))
2882 goto badframe;
2883
2884 if (do_sigaltstack(frame_addr +
2885 offsetof(struct target_rt_sigframe, rs_uc.tuc_stack),
2886 0, get_sp_from_cpustate(env)) == -EFAULT)
2887 goto badframe;
2888
2889 env->active_tc.PC = env->CP0_EPC;
2890 /* I am not sure this is right, but it seems to work
2891 * maybe a problem with nested signals ? */
2892 env->CP0_EPC = 0;
2893 return -TARGET_QEMU_ESIGRETURN;
2894
2895 badframe:
2896 force_sig(TARGET_SIGSEGV/*, current*/);
2897 return 0;
2898 }
2899
2900 #elif defined(TARGET_SH4)
2901
2902 /*
2903 * code and data structures from linux kernel:
2904 * include/asm-sh/sigcontext.h
2905 * arch/sh/kernel/signal.c
2906 */
2907
2908 struct target_sigcontext {
2909 target_ulong oldmask;
2910
2911 /* CPU registers */
2912 target_ulong sc_gregs[16];
2913 target_ulong sc_pc;
2914 target_ulong sc_pr;
2915 target_ulong sc_sr;
2916 target_ulong sc_gbr;
2917 target_ulong sc_mach;
2918 target_ulong sc_macl;
2919
2920 /* FPU registers */
2921 target_ulong sc_fpregs[16];
2922 target_ulong sc_xfpregs[16];
2923 unsigned int sc_fpscr;
2924 unsigned int sc_fpul;
2925 unsigned int sc_ownedfp;
2926 };
2927
2928 struct target_sigframe
2929 {
2930 struct target_sigcontext sc;
2931 target_ulong extramask[TARGET_NSIG_WORDS-1];
2932 uint16_t retcode[3];
2933 };
2934
2935
2936 struct target_ucontext {
2937 target_ulong tuc_flags;
2938 struct target_ucontext *tuc_link;
2939 target_stack_t tuc_stack;
2940 struct target_sigcontext tuc_mcontext;
2941 target_sigset_t tuc_sigmask; /* mask last for extensibility */
2942 };
2943
2944 struct target_rt_sigframe
2945 {
2946 struct target_siginfo info;
2947 struct target_ucontext uc;
2948 uint16_t retcode[3];
2949 };
2950
2951
2952 #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
2953 #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
2954
2955 static abi_ulong get_sigframe(struct target_sigaction *ka,
2956 unsigned long sp, size_t frame_size)
2957 {
2958 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
2959 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2960 }
2961
2962 return (sp - frame_size) & -8ul;
2963 }
2964
2965 static int setup_sigcontext(struct target_sigcontext *sc,
2966 CPUState *regs, unsigned long mask)
2967 {
2968 int err = 0;
2969 int i;
2970
2971 #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
2972 COPY(gregs[0]); COPY(gregs[1]);
2973 COPY(gregs[2]); COPY(gregs[3]);
2974 COPY(gregs[4]); COPY(gregs[5]);
2975 COPY(gregs[6]); COPY(gregs[7]);
2976 COPY(gregs[8]); COPY(gregs[9]);
2977 COPY(gregs[10]); COPY(gregs[11]);
2978 COPY(gregs[12]); COPY(gregs[13]);
2979 COPY(gregs[14]); COPY(gregs[15]);
2980 COPY(gbr); COPY(mach);
2981 COPY(macl); COPY(pr);
2982 COPY(sr); COPY(pc);
2983 #undef COPY
2984
2985 for (i=0; i<16; i++) {
2986 err |= __put_user(regs->fregs[i], &sc->sc_fpregs[i]);
2987 }
2988 err |= __put_user(regs->fpscr, &sc->sc_fpscr);
2989 err |= __put_user(regs->fpul, &sc->sc_fpul);
2990
2991 /* non-iBCS2 extensions.. */
2992 err |= __put_user(mask, &sc->oldmask);
2993
2994 return err;
2995 }
2996
2997 static int restore_sigcontext(CPUState *regs, struct target_sigcontext *sc,
2998 target_ulong *r0_p)
2999 {
3000 unsigned int err = 0;
3001 int i;
3002
3003 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
3004 COPY(gregs[1]);
3005 COPY(gregs[2]); COPY(gregs[3]);
3006 COPY(gregs[4]); COPY(gregs[5]);
3007 COPY(gregs[6]); COPY(gregs[7]);
3008 COPY(gregs[8]); COPY(gregs[9]);
3009 COPY(gregs[10]); COPY(gregs[11]);
3010 COPY(gregs[12]); COPY(gregs[13]);
3011 COPY(gregs[14]); COPY(gregs[15]);
3012 COPY(gbr); COPY(mach);
3013 COPY(macl); COPY(pr);
3014 COPY(sr); COPY(pc);
3015 #undef COPY
3016
3017 for (i=0; i<16; i++) {
3018 err |= __get_user(regs->fregs[i], &sc->sc_fpregs[i]);
3019 }
3020 err |= __get_user(regs->fpscr, &sc->sc_fpscr);
3021 err |= __get_user(regs->fpul, &sc->sc_fpul);
3022
3023 regs->tra = -1; /* disable syscall checks */
3024 err |= __get_user(*r0_p, &sc->sc_gregs[0]);
3025 return err;
3026 }
3027
3028 static void setup_frame(int sig, struct target_sigaction *ka,
3029 target_sigset_t *set, CPUState *regs)
3030 {
3031 struct target_sigframe *frame;
3032 abi_ulong frame_addr;
3033 int i;
3034 int err = 0;
3035 int signal;
3036
3037 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
3038 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3039 goto give_sigsegv;
3040
3041 signal = current_exec_domain_sig(sig);
3042
3043 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
3044
3045 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
3046 err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
3047 }
3048
3049 /* Set up to return from userspace. If provided, use a stub
3050 already in userspace. */
3051 if (ka->sa_flags & TARGET_SA_RESTORER) {
3052 regs->pr = (unsigned long) ka->sa_restorer;
3053 } else {
3054 /* Generate return code (system call to sigreturn) */
3055 err |= __put_user(MOVW(2), &frame->retcode[0]);
3056 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
3057 err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
3058 regs->pr = (unsigned long) frame->retcode;
3059 }
3060
3061 if (err)
3062 goto give_sigsegv;
3063
3064 /* Set up registers for signal handler */
3065 regs->gregs[15] = (unsigned long) frame;
3066 regs->gregs[4] = signal; /* Arg for signal handler */
3067 regs->gregs[5] = 0;
3068 regs->gregs[6] = (unsigned long) &frame->sc;
3069 regs->pc = (unsigned long) ka->_sa_handler;
3070
3071 unlock_user_struct(frame, frame_addr, 1);
3072 return;
3073
3074 give_sigsegv:
3075 unlock_user_struct(frame, frame_addr, 1);
3076 force_sig(TARGET_SIGSEGV);
3077 }
3078
3079 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3080 target_siginfo_t *info,
3081 target_sigset_t *set, CPUState *regs)
3082 {
3083 struct target_rt_sigframe *frame;
3084 abi_ulong frame_addr;
3085 int i;
3086 int err = 0;
3087 int signal;
3088
3089 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
3090 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3091 goto give_sigsegv;
3092
3093 signal = current_exec_domain_sig(sig);
3094
3095 err |= copy_siginfo_to_user(&frame->info, info);
3096
3097 /* Create the ucontext. */
3098 err |= __put_user(0, &frame->uc.tuc_flags);
3099 err |= __put_user(0, (unsigned long *)&frame->uc.tuc_link);
3100 err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp,
3101 &frame->uc.tuc_stack.ss_sp);
3102 err |= __put_user(sas_ss_flags(regs->gregs[15]),
3103 &frame->uc.tuc_stack.ss_flags);
3104 err |= __put_user(target_sigaltstack_used.ss_size,
3105 &frame->uc.tuc_stack.ss_size);
3106 err |= setup_sigcontext(&frame->uc.tuc_mcontext,
3107 regs, set->sig[0]);
3108 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
3109 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
3110 }
3111
3112 /* Set up to return from userspace. If provided, use a stub
3113 already in userspace. */
3114 if (ka->sa_flags & TARGET_SA_RESTORER) {
3115 regs->pr = (unsigned long) ka->sa_restorer;
3116 } else {
3117 /* Generate return code (system call to sigreturn) */
3118 err |= __put_user(MOVW(2), &frame->retcode[0]);
3119 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
3120 err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
3121 regs->pr = (unsigned long) frame->retcode;
3122 }
3123
3124 if (err)
3125 goto give_sigsegv;
3126
3127 /* Set up registers for signal handler */
3128 regs->gregs[15] = (unsigned long) frame;
3129 regs->gregs[4] = signal; /* Arg for signal handler */
3130 regs->gregs[5] = (unsigned long) &frame->info;
3131 regs->gregs[6] = (unsigned long) &frame->uc;
3132 regs->pc = (unsigned long) ka->_sa_handler;
3133
3134 unlock_user_struct(frame, frame_addr, 1);
3135 return;
3136
3137 give_sigsegv:
3138 unlock_user_struct(frame, frame_addr, 1);
3139 force_sig(TARGET_SIGSEGV);
3140 }
3141
3142 long do_sigreturn(CPUState *regs)
3143 {
3144 struct target_sigframe *frame;
3145 abi_ulong frame_addr;
3146 sigset_t blocked;
3147 target_sigset_t target_set;
3148 target_ulong r0;
3149 int i;
3150 int err = 0;
3151
3152 #if defined(DEBUG_SIGNAL)
3153 fprintf(stderr, "do_sigreturn\n");
3154 #endif
3155 frame_addr = regs->gregs[15];
3156 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3157 goto badframe;
3158
3159 err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
3160 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3161 err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
3162 }
3163
3164 if (err)
3165 goto badframe;
3166
3167 target_to_host_sigset_internal(&blocked, &target_set);
3168 sigprocmask(SIG_SETMASK, &blocked, NULL);
3169
3170 if (restore_sigcontext(regs, &frame->sc, &r0))
3171 goto badframe;
3172
3173 unlock_user_struct(frame, frame_addr, 0);
3174 return r0;
3175
3176 badframe:
3177 unlock_user_struct(frame, frame_addr, 0);
3178 force_sig(TARGET_SIGSEGV);
3179 return 0;
3180 }
3181
3182 long do_rt_sigreturn(CPUState *regs)
3183 {
3184 struct target_rt_sigframe *frame;
3185 abi_ulong frame_addr;
3186 sigset_t blocked;
3187 target_ulong r0;
3188
3189 #if defined(DEBUG_SIGNAL)
3190 fprintf(stderr, "do_rt_sigreturn\n");
3191 #endif
3192 frame_addr = regs->gregs[15];
3193 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3194 goto badframe;
3195
3196 target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask);
3197 sigprocmask(SIG_SETMASK, &blocked, NULL);
3198
3199 if (restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0))
3200 goto badframe;
3201
3202 if (do_sigaltstack(frame_addr +
3203 offsetof(struct target_rt_sigframe, uc.tuc_stack),
3204 0, get_sp_from_cpustate(regs)) == -EFAULT)
3205 goto badframe;
3206
3207 unlock_user_struct(frame, frame_addr, 0);
3208 return r0;
3209
3210 badframe:
3211 unlock_user_struct(frame, frame_addr, 0);
3212 force_sig(TARGET_SIGSEGV);
3213 return 0;
3214 }
3215 #elif defined(TARGET_MICROBLAZE)
3216
3217 struct target_sigcontext {
3218 struct target_pt_regs regs; /* needs to be first */
3219 uint32_t oldmask;
3220 };
3221
3222 struct target_stack_t {
3223 abi_ulong ss_sp;
3224 int ss_flags;
3225 unsigned int ss_size;
3226 };
3227
3228 struct target_ucontext {
3229 abi_ulong tuc_flags;
3230 abi_ulong tuc_link;
3231 struct target_stack_t tuc_stack;
3232 struct target_sigcontext tuc_mcontext;
3233 uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1];
3234 };
3235
3236 /* Signal frames. */
3237 struct target_signal_frame {
3238 struct target_ucontext uc;
3239 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3240 uint32_t tramp[2];
3241 };
3242
3243 struct rt_signal_frame {
3244 struct siginfo info;
3245 struct ucontext uc;
3246 uint32_t tramp[2];
3247 };
3248
3249 static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env)
3250 {
3251 __put_user(env->regs[0], &sc->regs.r0);
3252 __put_user(env->regs[1], &sc->regs.r1);
3253 __put_user(env->regs[2], &sc->regs.r2);
3254 __put_user(env->regs[3], &sc->regs.r3);
3255 __put_user(env->regs[4], &sc->regs.r4);
3256 __put_user(env->regs[5], &sc->regs.r5);
3257 __put_user(env->regs[6], &sc->regs.r6);
3258 __put_user(env->regs[7], &sc->regs.r7);
3259 __put_user(env->regs[8], &sc->regs.r8);
3260 __put_user(env->regs[9], &sc->regs.r9);
3261 __put_user(env->regs[10], &sc->regs.r10);
3262 __put_user(env->regs[11], &sc->regs.r11);
3263 __put_user(env->regs[12], &sc->regs.r12);
3264 __put_user(env->regs[13], &sc->regs.r13);
3265 __put_user(env->regs[14], &sc->regs.r14);
3266 __put_user(env->regs[15], &sc->regs.r15);
3267 __put_user(env->regs[16], &sc->regs.r16);
3268 __put_user(env->regs[17], &sc->regs.r17);
3269 __put_user(env->regs[18], &sc->regs.r18);
3270 __put_user(env->regs[19], &sc->regs.r19);
3271 __put_user(env->regs[20], &sc->regs.r20);
3272 __put_user(env->regs[21], &sc->regs.r21);
3273 __put_user(env->regs[22], &sc->regs.r22);
3274 __put_user(env->regs[23], &sc->regs.r23);
3275 __put_user(env->regs[24], &sc->regs.r24);
3276 __put_user(env->regs[25], &sc->regs.r25);
3277 __put_user(env->regs[26], &sc->regs.r26);
3278 __put_user(env->regs[27], &sc->regs.r27);
3279 __put_user(env->regs[28], &sc->regs.r28);
3280 __put_user(env->regs[29], &sc->regs.r29);
3281 __put_user(env->regs[30], &sc->regs.r30);
3282 __put_user(env->regs[31], &sc->regs.r31);
3283 __put_user(env->sregs[SR_PC], &sc->regs.pc);
3284 }
3285
3286 static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env)
3287 {
3288 __get_user(env->regs[0], &sc->regs.r0);
3289 __get_user(env->regs[1], &sc->regs.r1);
3290 __get_user(env->regs[2], &sc->regs.r2);
3291 __get_user(env->regs[3], &sc->regs.r3);
3292 __get_user(env->regs[4], &sc->regs.r4);
3293 __get_user(env->regs[5], &sc->regs.r5);
3294 __get_user(env->regs[6], &sc->regs.r6);
3295 __get_user(env->regs[7], &sc->regs.r7);
3296 __get_user(env->regs[8], &sc->regs.r8);
3297 __get_user(env->regs[9], &sc->regs.r9);
3298 __get_user(env->regs[10], &sc->regs.r10);
3299 __get_user(env->regs[11], &sc->regs.r11);
3300 __get_user(env->regs[12], &sc->regs.r12);
3301 __get_user(env->regs[13], &sc->regs.r13);
3302 __get_user(env->regs[14], &sc->regs.r14);
3303 __get_user(env->regs[15], &sc->regs.r15);
3304 __get_user(env->regs[16], &sc->regs.r16);
3305 __get_user(env->regs[17], &sc->regs.r17);
3306 __get_user(env->regs[18], &sc->regs.r18);
3307 __get_user(env->regs[19], &sc->regs.r19);
3308 __get_user(env->regs[20], &sc->regs.r20);
3309 __get_user(env->regs[21], &sc->regs.r21);
3310 __get_user(env->regs[22], &sc->regs.r22);
3311 __get_user(env->regs[23], &sc->regs.r23);
3312 __get_user(env->regs[24], &sc->regs.r24);
3313 __get_user(env->regs[25], &sc->regs.r25);
3314 __get_user(env->regs[26], &sc->regs.r26);
3315 __get_user(env->regs[27], &sc->regs.r27);
3316 __get_user(env->regs[28], &sc->regs.r28);
3317 __get_user(env->regs[29], &sc->regs.r29);
3318 __get_user(env->regs[30], &sc->regs.r30);
3319 __get_user(env->regs[31], &sc->regs.r31);
3320 __get_user(env->sregs[SR_PC], &sc->regs.pc);
3321 }
3322
3323 static abi_ulong get_sigframe(struct target_sigaction *ka,
3324 CPUState *env, int frame_size)
3325 {
3326 abi_ulong sp = env->regs[1];
3327
3328 if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp))
3329 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3330
3331 return ((sp - frame_size) & -8UL);
3332 }
3333
3334 static void setup_frame(int sig, struct target_sigaction *ka,
3335 target_sigset_t *set, CPUState *env)
3336 {
3337 struct target_signal_frame *frame;
3338 abi_ulong frame_addr;
3339 int err = 0;
3340 int i;
3341
3342 frame_addr = get_sigframe(ka, env, sizeof *frame);
3343 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3344 goto badframe;
3345
3346 /* Save the mask. */
3347 err |= __put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask);
3348 if (err)
3349 goto badframe;
3350
3351 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3352 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
3353 goto badframe;
3354 }
3355
3356 setup_sigcontext(&frame->uc.tuc_mcontext, env);
3357
3358 /* Set up to return from userspace. If provided, use a stub
3359 already in userspace. */
3360 /* minus 8 is offset to cater for "rtsd r15,8" offset */
3361 if (ka->sa_flags & TARGET_SA_RESTORER) {
3362 env->regs[15] = ((unsigned long)ka->sa_restorer)-8;
3363 } else {
3364 uint32_t t;
3365 /* Note, these encodings are _big endian_! */
3366 /* addi r12, r0, __NR_sigreturn */
3367 t = 0x31800000UL | TARGET_NR_sigreturn;
3368 err |= __put_user(t, frame->tramp + 0);
3369 /* brki r14, 0x8 */
3370 t = 0xb9cc0008UL;
3371 err |= __put_user(t, frame->tramp + 1);
3372
3373 /* Return from sighandler will jump to the tramp.
3374 Negative 8 offset because return is rtsd r15, 8 */
3375 env->regs[15] = ((unsigned long)frame->tramp) - 8;
3376 }
3377
3378 if (err)
3379 goto badframe;
3380
3381 /* Set up registers for signal handler */
3382 env->regs[1] = (unsigned long) frame;
3383 /* Signal handler args: */
3384 env->regs[5] = sig; /* Arg 0: signum */
3385 env->regs[6] = 0;
3386 env->regs[7] = (unsigned long) &frame->uc; /* arg 1: sigcontext */
3387
3388 /* Offset of 4 to handle microblaze rtid r14, 0 */
3389 env->sregs[SR_PC] = (unsigned long)ka->_sa_handler;
3390
3391 unlock_user_struct(frame, frame_addr, 1);
3392 return;
3393 badframe:
3394 unlock_user_struct(frame, frame_addr, 1);
3395 force_sig(TARGET_SIGSEGV);
3396 }
3397
3398 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3399 target_siginfo_t *info,
3400 target_sigset_t *set, CPUState *env)
3401 {
3402 fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n");
3403 }
3404
3405 long do_sigreturn(CPUState *env)
3406 {
3407 struct target_signal_frame *frame;
3408 abi_ulong frame_addr;
3409 target_sigset_t target_set;
3410 sigset_t set;
3411 int i;
3412
3413 frame_addr = env->regs[R_SP];
3414 /* Make sure the guest isn't playing games. */
3415 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3416 goto badframe;
3417
3418 /* Restore blocked signals */
3419 if (__get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask))
3420 goto badframe;
3421 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3422 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3423 goto badframe;
3424 }
3425 target_to_host_sigset_internal(&set, &target_set);
3426 sigprocmask(SIG_SETMASK, &set, NULL);
3427
3428 restore_sigcontext(&frame->uc.tuc_mcontext, env);
3429 /* We got here through a sigreturn syscall, our path back is via an
3430 rtb insn so setup r14 for that. */
3431 env->regs[14] = env->sregs[SR_PC];
3432
3433 unlock_user_struct(frame, frame_addr, 0);
3434 return env->regs[10];
3435 badframe:
3436 unlock_user_struct(frame, frame_addr, 0);
3437 force_sig(TARGET_SIGSEGV);
3438 }
3439
3440 long do_rt_sigreturn(CPUState *env)
3441 {
3442 fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n");
3443 return -TARGET_ENOSYS;
3444 }
3445
3446 #elif defined(TARGET_CRIS)
3447
3448 struct target_sigcontext {
3449 struct target_pt_regs regs; /* needs to be first */
3450 uint32_t oldmask;
3451 uint32_t usp; /* usp before stacking this gunk on it */
3452 };
3453
3454 /* Signal frames. */
3455 struct target_signal_frame {
3456 struct target_sigcontext sc;
3457 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3458 uint8_t retcode[8]; /* Trampoline code. */
3459 };
3460
3461 struct rt_signal_frame {
3462 struct siginfo *pinfo;
3463 void *puc;
3464 struct siginfo info;
3465 struct ucontext uc;
3466 uint8_t retcode[8]; /* Trampoline code. */
3467 };
3468
3469 static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env)
3470 {
3471 __put_user(env->regs[0], &sc->regs.r0);
3472 __put_user(env->regs[1], &sc->regs.r1);
3473 __put_user(env->regs[2], &sc->regs.r2);
3474 __put_user(env->regs[3], &sc->regs.r3);
3475 __put_user(env->regs[4], &sc->regs.r4);
3476 __put_user(env->regs[5], &sc->regs.r5);
3477 __put_user(env->regs[6], &sc->regs.r6);
3478 __put_user(env->regs[7], &sc->regs.r7);
3479 __put_user(env->regs[8], &sc->regs.r8);
3480 __put_user(env->regs[9], &sc->regs.r9);
3481 __put_user(env->regs[10], &sc->regs.r10);
3482 __put_user(env->regs[11], &sc->regs.r11);
3483 __put_user(env->regs[12], &sc->regs.r12);
3484 __put_user(env->regs[13], &sc->regs.r13);
3485 __put_user(env->regs[14], &sc->usp);
3486 __put_user(env->regs[15], &sc->regs.acr);
3487 __put_user(env->pregs[PR_MOF], &sc->regs.mof);
3488 __put_user(env->pregs[PR_SRP], &sc->regs.srp);
3489 __put_user(env->pc, &sc->regs.erp);
3490 }
3491
3492 static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env)
3493 {
3494 __get_user(env->regs[0], &sc->regs.r0);
3495 __get_user(env->regs[1], &sc->regs.r1);
3496 __get_user(env->regs[2], &sc->regs.r2);
3497 __get_user(env->regs[3], &sc->regs.r3);
3498 __get_user(env->regs[4], &sc->regs.r4);
3499 __get_user(env->regs[5], &sc->regs.r5);
3500 __get_user(env->regs[6], &sc->regs.r6);
3501 __get_user(env->regs[7], &sc->regs.r7);
3502 __get_user(env->regs[8], &sc->regs.r8);
3503 __get_user(env->regs[9], &sc->regs.r9);
3504 __get_user(env->regs[10], &sc->regs.r10);
3505 __get_user(env->regs[11], &sc->regs.r11);
3506 __get_user(env->regs[12], &sc->regs.r12);
3507 __get_user(env->regs[13], &sc->regs.r13);
3508 __get_user(env->regs[14], &sc->usp);
3509 __get_user(env->regs[15], &sc->regs.acr);
3510 __get_user(env->pregs[PR_MOF], &sc->regs.mof);
3511 __get_user(env->pregs[PR_SRP], &sc->regs.srp);
3512 __get_user(env->pc, &sc->regs.erp);
3513 }
3514
3515 static abi_ulong get_sigframe(CPUState *env, int framesize)
3516 {
3517 abi_ulong sp;
3518 /* Align the stack downwards to 4. */
3519 sp = (env->regs[R_SP] & ~3);
3520 return sp - framesize;
3521 }
3522
3523 static void setup_frame(int sig, struct target_sigaction *ka,
3524 target_sigset_t *set, CPUState *env)
3525 {
3526 struct target_signal_frame *frame;
3527 abi_ulong frame_addr;
3528 int err = 0;
3529 int i;
3530
3531 frame_addr = get_sigframe(env, sizeof *frame);
3532 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3533 goto badframe;
3534
3535 /*
3536 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
3537 * use this trampoline anymore but it sets it up for GDB.
3538 * In QEMU, using the trampoline simplifies things a bit so we use it.
3539 *
3540 * This is movu.w __NR_sigreturn, r9; break 13;
3541 */
3542 err |= __put_user(0x9c5f, frame->retcode+0);
3543 err |= __put_user(TARGET_NR_sigreturn,
3544 frame->retcode+2);
3545 err |= __put_user(0xe93d, frame->retcode+4);
3546
3547 /* Save the mask. */
3548 err |= __put_user(set->sig[0], &frame->sc.oldmask);
3549 if (err)
3550 goto badframe;
3551
3552 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3553 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
3554 goto badframe;
3555 }
3556
3557 setup_sigcontext(&frame->sc, env);
3558
3559 /* Move the stack and setup the arguments for the handler. */
3560 env->regs[R_SP] = (uint32_t) (unsigned long) frame;
3561 env->regs[10] = sig;
3562 env->pc = (unsigned long) ka->_sa_handler;
3563 /* Link SRP so the guest returns through the trampoline. */
3564 env->pregs[PR_SRP] = (uint32_t) (unsigned long) &frame->retcode[0];
3565
3566 unlock_user_struct(frame, frame_addr, 1);
3567 return;
3568 badframe:
3569 unlock_user_struct(frame, frame_addr, 1);
3570 force_sig(TARGET_SIGSEGV);
3571 }
3572
3573 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3574 target_siginfo_t *info,
3575 target_sigset_t *set, CPUState *env)
3576 {
3577 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
3578 }
3579
3580 long do_sigreturn(CPUState *env)
3581 {
3582 struct target_signal_frame *frame;
3583 abi_ulong frame_addr;
3584 target_sigset_t target_set;
3585 sigset_t set;
3586 int i;
3587
3588 frame_addr = env->regs[R_SP];
3589 /* Make sure the guest isn't playing games. */
3590 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3591 goto badframe;
3592
3593 /* Restore blocked signals */
3594 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
3595 goto badframe;
3596 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3597 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3598 goto badframe;
3599 }
3600 target_to_host_sigset_internal(&set, &target_set);
3601 sigprocmask(SIG_SETMASK, &set, NULL);
3602
3603 restore_sigcontext(&frame->sc, env);
3604 unlock_user_struct(frame, frame_addr, 0);
3605 return env->regs[10];
3606 badframe:
3607 unlock_user_struct(frame, frame_addr, 0);
3608 force_sig(TARGET_SIGSEGV);
3609 }
3610
3611 long do_rt_sigreturn(CPUState *env)
3612 {
3613 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
3614 return -TARGET_ENOSYS;
3615 }
3616
3617 #elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
3618
3619 /* FIXME: Many of the structures are defined for both PPC and PPC64, but
3620 the signal handling is different enough that we haven't implemented
3621 support for PPC64 yet. Hence the restriction above.
3622
3623 There are various #if'd blocks for code for TARGET_PPC64. These
3624 blocks should go away so that we can successfully run 32-bit and
3625 64-bit binaries on a QEMU configured for PPC64. */
3626
3627 /* Size of dummy stack frame allocated when calling signal handler.
3628 See arch/powerpc/include/asm/ptrace.h. */
3629 #if defined(TARGET_PPC64)
3630 #define SIGNAL_FRAMESIZE 128
3631 #else
3632 #define SIGNAL_FRAMESIZE 64
3633 #endif
3634
3635 /* See arch/powerpc/include/asm/sigcontext.h. */
3636 struct target_sigcontext {
3637 target_ulong _unused[4];
3638 int32_t signal;
3639 #if defined(TARGET_PPC64)
3640 int32_t pad0;
3641 #endif
3642 target_ulong handler;
3643 target_ulong oldmask;
3644 target_ulong regs; /* struct pt_regs __user * */
3645 /* TODO: PPC64 includes extra bits here. */
3646 };
3647
3648 /* Indices for target_mcontext.mc_gregs, below.
3649 See arch/powerpc/include/asm/ptrace.h for details. */
3650 enum {
3651 TARGET_PT_R0 = 0,
3652 TARGET_PT_R1 = 1,
3653 TARGET_PT_R2 = 2,
3654 TARGET_PT_R3 = 3,
3655 TARGET_PT_R4 = 4,
3656 TARGET_PT_R5 = 5,
3657 TARGET_PT_R6 = 6,
3658 TARGET_PT_R7 = 7,
3659 TARGET_PT_R8 = 8,
3660 TARGET_PT_R9 = 9,
3661 TARGET_PT_R10 = 10,
3662 TARGET_PT_R11 = 11,
3663 TARGET_PT_R12 = 12,
3664 TARGET_PT_R13 = 13,
3665 TARGET_PT_R14 = 14,
3666 TARGET_PT_R15 = 15,
3667 TARGET_PT_R16 = 16,
3668 TARGET_PT_R17 = 17,
3669 TARGET_PT_R18 = 18,
3670 TARGET_PT_R19 = 19,
3671 TARGET_PT_R20 = 20,
3672 TARGET_PT_R21 = 21,
3673 TARGET_PT_R22 = 22,
3674 TARGET_PT_R23 = 23,
3675 TARGET_PT_R24 = 24,
3676 TARGET_PT_R25 = 25,
3677 TARGET_PT_R26 = 26,
3678 TARGET_PT_R27 = 27,
3679 TARGET_PT_R28 = 28,
3680 TARGET_PT_R29 = 29,
3681 TARGET_PT_R30 = 30,
3682 TARGET_PT_R31 = 31,
3683 TARGET_PT_NIP = 32,
3684 TARGET_PT_MSR = 33,
3685 TARGET_PT_ORIG_R3 = 34,
3686 TARGET_PT_CTR = 35,
3687 TARGET_PT_LNK = 36,
3688 TARGET_PT_XER = 37,
3689 TARGET_PT_CCR = 38,
3690 /* Yes, there are two registers with #39. One is 64-bit only. */
3691 TARGET_PT_MQ = 39,
3692 TARGET_PT_SOFTE = 39,
3693 TARGET_PT_TRAP = 40,
3694 TARGET_PT_DAR = 41,
3695 TARGET_PT_DSISR = 42,
3696 TARGET_PT_RESULT = 43,
3697 TARGET_PT_REGS_COUNT = 44
3698 };
3699
3700 /* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC;
3701 on 64-bit PPC, sigcontext and mcontext are one and the same. */
3702 struct target_mcontext {
3703 target_ulong mc_gregs[48];
3704 /* Includes fpscr. */
3705 uint64_t mc_fregs[33];
3706 target_ulong mc_pad[2];
3707 /* We need to handle Altivec and SPE at the same time, which no
3708 kernel needs to do. Fortunately, the kernel defines this bit to
3709 be Altivec-register-large all the time, rather than trying to
3710 twiddle it based on the specific platform. */
3711 union {
3712 /* SPE vector registers. One extra for SPEFSCR. */
3713 uint32_t spe[33];
3714 /* Altivec vector registers. The packing of VSCR and VRSAVE
3715 varies depending on whether we're PPC64 or not: PPC64 splits
3716 them apart; PPC32 stuffs them together. */
3717 #if defined(TARGET_PPC64)
3718 #define QEMU_NVRREG 34
3719 #else
3720 #define QEMU_NVRREG 33
3721 #endif
3722 ppc_avr_t altivec[QEMU_NVRREG];
3723 #undef QEMU_NVRREG
3724 } mc_vregs __attribute__((__aligned__(16)));
3725 };
3726
3727 struct target_ucontext {
3728 target_ulong tuc_flags;
3729 target_ulong tuc_link; /* struct ucontext __user * */
3730 struct target_sigaltstack tuc_stack;
3731 #if !defined(TARGET_PPC64)
3732 int32_t tuc_pad[7];
3733 target_ulong tuc_regs; /* struct mcontext __user *
3734 points to uc_mcontext field */
3735 #endif
3736 target_sigset_t tuc_sigmask;
3737 #if defined(TARGET_PPC64)
3738 target_sigset_t unused[15]; /* Allow for uc_sigmask growth */
3739 struct target_sigcontext tuc_mcontext;
3740 #else
3741 int32_t tuc_maskext[30];
3742 int32_t tuc_pad2[3];
3743 struct target_mcontext tuc_mcontext;
3744 #endif
3745 };
3746
3747 /* See arch/powerpc/kernel/signal_32.c. */
3748 struct target_sigframe {
3749 struct target_sigcontext sctx;
3750 struct target_mcontext mctx;
3751 int32_t abigap[56];
3752 };
3753
3754 struct target_rt_sigframe {
3755 struct target_siginfo info;
3756 struct target_ucontext uc;
3757 int32_t abigap[56];
3758 };
3759
3760 /* We use the mc_pad field for the signal return trampoline. */
3761 #define tramp mc_pad
3762
3763 /* See arch/powerpc/kernel/signal.c. */
3764 static target_ulong get_sigframe(struct target_sigaction *ka,
3765 CPUState *env,
3766 int frame_size)
3767 {
3768 target_ulong oldsp, newsp;
3769
3770 oldsp = env->gpr[1];
3771
3772 if ((ka->sa_flags & TARGET_SA_ONSTACK) &&
3773 (sas_ss_flags(oldsp))) {
3774 oldsp = (target_sigaltstack_used.ss_sp
3775 + target_sigaltstack_used.ss_size);
3776 }
3777
3778 newsp = (oldsp - frame_size) & ~0xFUL;
3779
3780 return newsp;
3781 }
3782
3783 static int save_user_regs(CPUState *env, struct target_mcontext *frame,
3784 int sigret)
3785 {
3786 target_ulong msr = env->msr;
3787 int i;
3788 target_ulong ccr = 0;
3789
3790 /* In general, the kernel attempts to be intelligent about what it
3791 needs to save for Altivec/FP/SPE registers. We don't care that
3792 much, so we just go ahead and save everything. */
3793
3794 /* Save general registers. */
3795 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
3796 if (__put_user(env->gpr[i], &frame->mc_gregs[i])) {
3797 return 1;
3798 }
3799 }
3800 if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
3801 || __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
3802 || __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
3803 || __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
3804 return 1;
3805
3806 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
3807 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
3808 }
3809 if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
3810 return 1;
3811
3812 /* Save Altivec registers if necessary. */
3813 if (env->insns_flags & PPC_ALTIVEC) {
3814 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
3815 ppc_avr_t *avr = &env->avr[i];
3816 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
3817
3818 if (__put_user(avr->u64[0], &vreg->u64[0]) ||
3819 __put_user(avr->u64[1], &vreg->u64[1])) {
3820 return 1;
3821 }
3822 }
3823 /* Set MSR_VR in the saved MSR value to indicate that
3824 frame->mc_vregs contains valid data. */
3825 msr |= MSR_VR;
3826 if (__put_user((uint32_t)env->spr[SPR_VRSAVE],
3827 &frame->mc_vregs.altivec[32].u32[3]))
3828 return 1;
3829 }
3830
3831 /* Save floating point registers. */
3832 if (env->insns_flags & PPC_FLOAT) {
3833 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
3834 if (__put_user(env->fpr[i], &frame->mc_fregs[i])) {
3835 return 1;
3836 }
3837 }
3838 if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32]))
3839 return 1;
3840 }
3841
3842 /* Save SPE registers. The kernel only saves the high half. */
3843 if (env->insns_flags & PPC_SPE) {
3844 #if defined(TARGET_PPC64)
3845 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
3846 if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) {
3847 return 1;
3848 }
3849 }
3850 #else
3851 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
3852 if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
3853 return 1;
3854 }
3855 }
3856 #endif
3857 /* Set MSR_SPE in the saved MSR value to indicate that
3858 frame->mc_vregs contains valid data. */
3859 msr |= MSR_SPE;
3860 if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
3861 return 1;
3862 }
3863
3864 /* Store MSR. */
3865 if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
3866 return 1;
3867
3868 /* Set up the sigreturn trampoline: li r0,sigret; sc. */
3869 if (sigret) {
3870 if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) ||
3871 __put_user(0x44000002UL, &frame->tramp[1])) {
3872 return 1;
3873 }
3874 }
3875
3876 return 0;
3877 }
3878
3879 static int restore_user_regs(CPUState *env,
3880 struct target_mcontext *frame, int sig)
3881 {
3882 target_ulong save_r2 = 0;
3883 target_ulong msr;
3884 target_ulong ccr;
3885
3886 int i;
3887
3888 if (!sig) {
3889 save_r2 = env->gpr[2];
3890 }
3891
3892 /* Restore general registers. */
3893 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
3894 if (__get_user(env->gpr[i], &frame->mc_gregs[i])) {
3895 return 1;
3896 }
3897 }
3898 if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
3899 || __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
3900 || __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
3901 || __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
3902 return 1;
3903 if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
3904 return 1;
3905
3906 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
3907 env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf;
3908 }
3909
3910 if (!sig) {
3911 env->gpr[2] = save_r2;
3912 }
3913 /* Restore MSR. */
3914 if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
3915 return 1;
3916
3917 /* If doing signal return, restore the previous little-endian mode. */
3918 if (sig)
3919 env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE);
3920
3921 /* Restore Altivec registers if necessary. */
3922 if (env->insns_flags & PPC_ALTIVEC) {
3923 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
3924 ppc_avr_t *avr = &env->avr[i];
3925 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
3926
3927 if (__get_user(avr->u64[0], &vreg->u64[0]) ||
3928 __get_user(avr->u64[1], &vreg->u64[1])) {
3929 return 1;
3930 }
3931 }
3932 /* Set MSR_VEC in the saved MSR value to indicate that
3933 frame->mc_vregs contains valid data. */
3934 if (__get_user(env->spr[SPR_VRSAVE],
3935 (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3])))
3936 return 1;
3937 }
3938
3939 /* Restore floating point registers. */
3940 if (env->insns_flags & PPC_FLOAT) {
3941 uint64_t fpscr;
3942 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
3943 if (__get_user(env->fpr[i], &frame->mc_fregs[i])) {
3944 return 1;
3945 }
3946 }
3947 if (__get_user(fpscr, &frame->mc_fregs[32]))
3948 return 1;
3949 env->fpscr = (uint32_t) fpscr;
3950 }
3951
3952 /* Save SPE registers. The kernel only saves the high half. */
3953 if (env->insns_flags & PPC_SPE) {
3954 #if defined(TARGET_PPC64)
3955 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
3956 uint32_t hi;
3957
3958 if (__get_user(hi, &frame->mc_vregs.spe[i])) {
3959 return 1;
3960 }
3961 env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
3962 }
3963 #else
3964 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
3965 if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
3966 return 1;
3967 }
3968 }
3969 #endif
3970 if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
3971 return 1;
3972 }
3973
3974 return 0;
3975 }
3976
3977 static void setup_frame(int sig, struct target_sigaction *ka,
3978 target_sigset_t *set, CPUState *env)
3979 {
3980 struct target_sigframe *frame;
3981 struct target_sigcontext *sc;
3982 target_ulong frame_addr, newsp;
3983 int err = 0;
3984 int signal;
3985
3986 frame_addr = get_sigframe(ka, env, sizeof(*frame));
3987 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3988 goto sigsegv;
3989 sc = &frame->sctx;
3990
3991 signal = current_exec_domain_sig(sig);
3992
3993 err |= __put_user(h2g(ka->_sa_handler), &sc->handler);
3994 err |= __put_user(set->sig[0], &sc->oldmask);
3995 #if defined(TARGET_PPC64)
3996 err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]);
3997 #else
3998 err |= __put_user(set->sig[1], &sc->_unused[3]);
3999 #endif
4000 err |= __put_user(h2g(&frame->mctx), &sc->regs);
4001 err |= __put_user(sig, &sc->signal);
4002
4003 /* Save user regs. */
4004 err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn);
4005
4006 /* The kernel checks for the presence of a VDSO here. We don't
4007 emulate a vdso, so use a sigreturn system call. */
4008 env->lr = (target_ulong) h2g(frame->mctx.tramp);
4009
4010 /* Turn off all fp exceptions. */
4011 env->fpscr = 0;
4012
4013 /* Create a stack frame for the caller of the handler. */
4014 newsp = frame_addr - SIGNAL_FRAMESIZE;
4015 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
4016
4017 if (err)
4018 goto sigsegv;
4019
4020 /* Set up registers for signal handler. */
4021 env->gpr[1] = newsp;
4022 env->gpr[3] = signal;
4023 env->gpr[4] = (target_ulong) h2g(sc);
4024 env->nip = (target_ulong) ka->_sa_handler;
4025 /* Signal handlers are entered in big-endian mode. */
4026 env->msr &= ~MSR_LE;
4027
4028 unlock_user_struct(frame, frame_addr, 1);
4029 return;
4030
4031 sigsegv:
4032 unlock_user_struct(frame, frame_addr, 1);
4033 if (logfile)
4034 fprintf (logfile, "segfaulting from setup_frame\n");
4035 force_sig(TARGET_SIGSEGV);
4036 }
4037
4038 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4039 target_siginfo_t *info,
4040 target_sigset_t *set, CPUState *env)
4041 {
4042 struct target_rt_sigframe *rt_sf;
4043 struct target_mcontext *frame;
4044 target_ulong rt_sf_addr, newsp = 0;
4045 int i, err = 0;
4046 int signal;
4047
4048 rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
4049 if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1))
4050 goto sigsegv;
4051
4052 signal = current_exec_domain_sig(sig);
4053
4054 err |= copy_siginfo_to_user(&rt_sf->info, info);
4055
4056 err |= __put_user(0, &rt_sf->uc.tuc_flags);
4057 err |= __put_user(0, &rt_sf->uc.tuc_link);
4058 err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp,
4059 &rt_sf->uc.tuc_stack.ss_sp);
4060 err |= __put_user(sas_ss_flags(env->gpr[1]),
4061 &rt_sf->uc.tuc_stack.ss_flags);
4062 err |= __put_user(target_sigaltstack_used.ss_size,
4063 &rt_sf->uc.tuc_stack.ss_size);
4064 err |= __put_user(h2g (&rt_sf->uc.tuc_mcontext),
4065 &rt_sf->uc.tuc_regs);
4066 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
4067 err |= __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]);
4068 }
4069
4070 frame = &rt_sf->uc.tuc_mcontext;
4071 err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn);
4072
4073 /* The kernel checks for the presence of a VDSO here. We don't
4074 emulate a vdso, so use a sigreturn system call. */
4075 env->lr = (target_ulong) h2g(frame->tramp);
4076
4077 /* Turn off all fp exceptions. */
4078 env->fpscr = 0;
4079
4080 /* Create a stack frame for the caller of the handler. */
4081 newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
4082 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
4083
4084 if (err)
4085 goto sigsegv;
4086
4087 /* Set up registers for signal handler. */
4088 env->gpr[1] = newsp;
4089 env->gpr[3] = (target_ulong) signal;
4090 env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
4091 env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
4092 env->gpr[6] = (target_ulong) h2g(rt_sf);
4093 env->nip = (target_ulong) ka->_sa_handler;
4094 /* Signal handlers are entered in big-endian mode. */
4095 env->msr &= ~MSR_LE;
4096
4097 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4098 return;
4099
4100 sigsegv:
4101 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4102 if (logfile)
4103 fprintf (logfile, "segfaulting from setup_rt_frame\n");
4104 force_sig(TARGET_SIGSEGV);
4105
4106 }
4107
4108 long do_sigreturn(CPUState *env)
4109 {
4110 struct target_sigcontext *sc = NULL;
4111 struct target_mcontext *sr = NULL;
4112 target_ulong sr_addr, sc_addr;
4113 sigset_t blocked;
4114 target_sigset_t set;
4115
4116 sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
4117 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1))
4118 goto sigsegv;
4119
4120 #if defined(TARGET_PPC64)
4121 set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32);
4122 #else
4123 if(__get_user(set.sig[0], &sc->oldmask) ||
4124 __get_user(set.sig[1], &sc->_unused[3]))
4125 goto sigsegv;
4126 #endif
4127 target_to_host_sigset_internal(&blocked, &set);
4128 sigprocmask(SIG_SETMASK, &blocked, NULL);
4129
4130 if (__get_user(sr_addr, &sc->regs))
4131 goto sigsegv;
4132 if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1))
4133 goto sigsegv;
4134 if (restore_user_regs(env, sr, 1))
4135 goto sigsegv;
4136
4137 unlock_user_struct(sr, sr_addr, 1);
4138 unlock_user_struct(sc, sc_addr, 1);
4139 return -TARGET_QEMU_ESIGRETURN;
4140
4141 sigsegv:
4142 unlock_user_struct(sr, sr_addr, 1);
4143 unlock_user_struct(sc, sc_addr, 1);
4144 if (logfile)
4145 fprintf (logfile, "segfaulting from do_sigreturn\n");
4146 force_sig(TARGET_SIGSEGV);
4147 return 0;
4148 }
4149
4150 /* See arch/powerpc/kernel/signal_32.c. */
4151 static int do_setcontext(struct target_ucontext *ucp, CPUState *env, int sig)
4152 {
4153 struct target_mcontext *mcp;
4154 target_ulong mcp_addr;
4155 sigset_t blocked;
4156 target_sigset_t set;
4157
4158 if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask),
4159 sizeof (set)))
4160 return 1;
4161
4162 #if defined(TARGET_PPC64)
4163 fprintf (stderr, "do_setcontext: not implemented\n");
4164 return 0;
4165 #else
4166 if (__get_user(mcp_addr, &ucp->tuc_regs))
4167 return 1;
4168
4169 if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1))
4170 return 1;
4171
4172 target_to_host_sigset_internal(&blocked, &set);
4173 sigprocmask(SIG_SETMASK, &blocked, NULL);
4174 if (restore_user_regs(env, mcp, sig))
4175 goto sigsegv;
4176
4177 unlock_user_struct(mcp, mcp_addr, 1);
4178 return 0;
4179
4180 sigsegv:
4181 unlock_user_struct(mcp, mcp_addr, 1);
4182 return 1;
4183 #endif
4184 }
4185
4186 long do_rt_sigreturn(CPUState *env)
4187 {
4188 struct target_rt_sigframe *rt_sf = NULL;
4189 target_ulong rt_sf_addr;
4190
4191 rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16;
4192 if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1))
4193 goto sigsegv;
4194
4195 if (do_setcontext(&rt_sf->uc, env, 1))
4196 goto sigsegv;
4197
4198 do_sigaltstack(rt_sf_addr
4199 + offsetof(struct target_rt_sigframe, uc.tuc_stack),
4200 0, env->gpr[1]);
4201
4202 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4203 return -TARGET_QEMU_ESIGRETURN;
4204
4205 sigsegv:
4206 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4207 if (logfile)
4208 fprintf (logfile, "segfaulting from do_rt_sigreturn\n");
4209 force_sig(TARGET_SIGSEGV);
4210 return 0;
4211 }
4212
4213 #elif defined(TARGET_M68K)
4214
4215 struct target_sigcontext {
4216 abi_ulong sc_mask;
4217 abi_ulong sc_usp;
4218 abi_ulong sc_d0;
4219 abi_ulong sc_d1;
4220 abi_ulong sc_a0;
4221 abi_ulong sc_a1;
4222 unsigned short sc_sr;
4223 abi_ulong sc_pc;
4224 };
4225
4226 struct target_sigframe
4227 {
4228 abi_ulong pretcode;
4229 int sig;
4230 int code;
4231 abi_ulong psc;
4232 char retcode[8];
4233 abi_ulong extramask[TARGET_NSIG_WORDS-1];
4234 struct target_sigcontext sc;
4235 };
4236
4237 typedef int target_greg_t;
4238 #define TARGET_NGREG 18
4239 typedef target_greg_t target_gregset_t[TARGET_NGREG];
4240
4241 typedef struct target_fpregset {
4242 int f_fpcntl[3];
4243 int f_fpregs[8*3];
4244 } target_fpregset_t;
4245
4246 struct target_mcontext {
4247 int version;
4248 target_gregset_t gregs;
4249 target_fpregset_t fpregs;
4250 };
4251
4252 #define TARGET_MCONTEXT_VERSION 2
4253
4254 struct target_ucontext {
4255 abi_ulong tuc_flags;
4256 abi_ulong tuc_link;
4257 target_stack_t tuc_stack;
4258 struct target_mcontext tuc_mcontext;
4259 abi_long tuc_filler[80];
4260 target_sigset_t tuc_sigmask;
4261 };
4262
4263 struct target_rt_sigframe
4264 {
4265 abi_ulong pretcode;
4266 int sig;
4267 abi_ulong pinfo;
4268 abi_ulong puc;
4269 char retcode[8];
4270 struct target_siginfo info;
4271 struct target_ucontext uc;
4272 };
4273
4274 static int
4275 setup_sigcontext(struct target_sigcontext *sc, CPUState *env, abi_ulong mask)
4276 {
4277 int err = 0;
4278
4279 err |= __put_user(mask, &sc->sc_mask);
4280 err |= __put_user(env->aregs[7], &sc->sc_usp);
4281 err |= __put_user(env->dregs[0], &sc->sc_d0);
4282 err |= __put_user(env->dregs[1], &sc->sc_d1);
4283 err |= __put_user(env->aregs[0], &sc->sc_a0);
4284 err |= __put_user(env->aregs[1], &sc->sc_a1);
4285 err |= __put_user(env->sr, &sc->sc_sr);
4286 err |= __put_user(env->pc, &sc->sc_pc);
4287
4288 return err;
4289 }
4290
4291 static int
4292 restore_sigcontext(CPUState *env, struct target_sigcontext *sc, int *pd0)
4293 {
4294 int err = 0;
4295 int temp;
4296
4297 err |= __get_user(env->aregs[7], &sc->sc_usp);
4298 err |= __get_user(env->dregs[1], &sc->sc_d1);
4299 err |= __get_user(env->aregs[0], &sc->sc_a0);
4300 err |= __get_user(env->aregs[1], &sc->sc_a1);
4301 err |= __get_user(env->pc, &sc->sc_pc);
4302 err |= __get_user(temp, &sc->sc_sr);
4303 env->sr = (env->sr & 0xff00) | (temp & 0xff);
4304
4305 *pd0 = tswapl(sc->sc_d0);
4306
4307 return err;
4308 }
4309
4310 /*
4311 * Determine which stack to use..
4312 */
4313 static inline abi_ulong
4314 get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
4315 {
4316 unsigned long sp;
4317
4318 sp = regs->aregs[7];
4319
4320 /* This is the X/Open sanctioned signal stack switching. */
4321 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
4322 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
4323 }
4324
4325 return ((sp - frame_size) & -8UL);
4326 }
4327
4328 static void setup_frame(int sig, struct target_sigaction *ka,
4329 target_sigset_t *set, CPUState *env)
4330 {
4331 struct target_sigframe *frame;
4332 abi_ulong frame_addr;
4333 abi_ulong retcode_addr;
4334 abi_ulong sc_addr;
4335 int err = 0;
4336 int i;
4337
4338 frame_addr = get_sigframe(ka, env, sizeof *frame);
4339 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
4340 goto give_sigsegv;
4341
4342 err |= __put_user(sig, &frame->sig);
4343
4344 sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
4345 err |= __put_user(sc_addr, &frame->psc);
4346
4347 err |= setup_sigcontext(&frame->sc, env, set->sig[0]);
4348 if (err)
4349 goto give_sigsegv;
4350
4351 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
4352 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
4353 goto give_sigsegv;
4354 }
4355
4356 /* Set up to return from userspace. */
4357
4358 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
4359 err |= __put_user(retcode_addr, &frame->pretcode);
4360
4361 /* moveq #,d0; trap #0 */
4362
4363 err |= __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16),
4364 (long *)(frame->retcode));
4365
4366 if (err)
4367 goto give_sigsegv;
4368
4369 /* Set up to return from userspace */
4370
4371 env->aregs[7] = frame_addr;
4372 env->pc = ka->_sa_handler;
4373
4374 unlock_user_struct(frame, frame_addr, 1);
4375 return;
4376
4377 give_sigsegv:
4378 unlock_user_struct(frame, frame_addr, 1);
4379 force_sig(TARGET_SIGSEGV);
4380 }
4381
4382 static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
4383 CPUState *env)
4384 {
4385 target_greg_t *gregs = uc->tuc_mcontext.gregs;
4386 int err;
4387
4388 err = __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version);
4389 err |= __put_user(env->dregs[0], &gregs[0]);
4390 err |= __put_user(env->dregs[1], &gregs[1]);
4391 err |= __put_user(env->dregs[2], &gregs[2]);
4392 err |= __put_user(env->dregs[3], &gregs[3]);
4393 err |= __put_user(env->dregs[4], &gregs[4]);
4394 err |= __put_user(env->dregs[5], &gregs[5]);
4395 err |= __put_user(env->dregs[6], &gregs[6]);
4396 err |= __put_user(env->dregs[7], &gregs[7]);
4397 err |= __put_user(env->aregs[0], &gregs[8]);
4398 err |= __put_user(env->aregs[1], &gregs[9]);
4399 err |= __put_user(env->aregs[2], &gregs[10]);
4400 err |= __put_user(env->aregs[3], &gregs[11]);
4401 err |= __put_user(env->aregs[4], &gregs[12]);
4402 err |= __put_user(env->aregs[5], &gregs[13]);
4403 err |= __put_user(env->aregs[6], &gregs[14]);
4404 err |= __put_user(env->aregs[7], &gregs[15]);
4405 err |= __put_user(env->pc, &gregs[16]);
4406 err |= __put_user(env->sr, &gregs[17]);
4407
4408 return err;
4409 }
4410
4411 static inline int target_rt_restore_ucontext(CPUState *env,
4412 struct target_ucontext *uc,
4413 int *pd0)
4414 {
4415 int temp;
4416 int err;
4417 target_greg_t *gregs = uc->tuc_mcontext.gregs;
4418
4419 err = __get_user(temp, &uc->tuc_mcontext.version);
4420 if (temp != TARGET_MCONTEXT_VERSION)
4421 goto badframe;
4422
4423 /* restore passed registers */
4424 err |= __get_user(env->dregs[0], &gregs[0]);
4425 err |= __get_user(env->dregs[1], &gregs[1]);
4426 err |= __get_user(env->dregs[2], &gregs[2]);
4427 err |= __get_user(env->dregs[3], &gregs[3]);
4428 err |= __get_user(env->dregs[4], &gregs[4]);
4429 err |= __get_user(env->dregs[5], &gregs[5]);
4430 err |= __get_user(env->dregs[6], &gregs[6]);
4431 err |= __get_user(env->dregs[7], &gregs[7]);
4432 err |= __get_user(env->aregs[0], &gregs[8]);
4433 err |= __get_user(env->aregs[1], &gregs[9]);
4434 err |= __get_user(env->aregs[2], &gregs[10]);
4435 err |= __get_user(env->aregs[3], &gregs[11]);
4436 err |= __get_user(env->aregs[4], &gregs[12]);
4437 err |= __get_user(env->aregs[5], &gregs[13]);
4438 err |= __get_user(env->aregs[6], &gregs[14]);
4439 err |= __get_user(env->aregs[7], &gregs[15]);
4440 err |= __get_user(env->pc, &gregs[16]);
4441 err |= __get_user(temp, &gregs[17]);
4442 env->sr = (env->sr & 0xff00) | (temp & 0xff);
4443
4444 *pd0 = env->dregs[0];
4445 return err;
4446
4447 badframe:
4448 return 1;
4449 }
4450
4451 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4452 target_siginfo_t *info,
4453 target_sigset_t *set, CPUState *env)
4454 {
4455 struct target_rt_sigframe *frame;
4456 abi_ulong frame_addr;
4457 abi_ulong retcode_addr;
4458 abi_ulong info_addr;
4459 abi_ulong uc_addr;
4460 int err = 0;
4461 int i;
4462
4463 frame_addr = get_sigframe(ka, env, sizeof *frame);
4464 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
4465 goto give_sigsegv;
4466
4467 err |= __put_user(sig, &frame->sig);
4468
4469 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
4470 err |= __put_user(info_addr, &frame->pinfo);
4471
4472 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
4473 err |= __put_user(uc_addr, &frame->puc);
4474
4475 err |= copy_siginfo_to_user(&frame->info, info);
4476
4477 /* Create the ucontext */
4478
4479 err |= __put_user(0, &frame->uc.tuc_flags);
4480 err |= __put_user(0, &frame->uc.tuc_link);
4481 err |= __put_user(target_sigaltstack_used.ss_sp,
4482 &frame->uc.tuc_stack.ss_sp);
4483 err |= __put_user(sas_ss_flags(env->aregs[7]),
4484 &frame->uc.tuc_stack.ss_flags);
4485 err |= __put_user(target_sigaltstack_used.ss_size,
4486 &frame->uc.tuc_stack.ss_size);
4487 err |= target_rt_setup_ucontext(&frame->uc, env);
4488
4489 if (err)
4490 goto give_sigsegv;
4491
4492 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
4493 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
4494 goto give_sigsegv;
4495 }
4496
4497 /* Set up to return from userspace. */
4498
4499 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
4500 err |= __put_user(retcode_addr, &frame->pretcode);
4501
4502 /* moveq #,d0; notb d0; trap #0 */
4503
4504 err |= __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
4505 (long *)(frame->retcode + 0));
4506 err |= __put_user(0x4e40, (short *)(frame->retcode + 4));
4507
4508 if (err)
4509 goto give_sigsegv;
4510
4511 /* Set up to return from userspace */
4512
4513 env->aregs[7] = frame_addr;
4514 env->pc = ka->_sa_handler;
4515
4516 unlock_user_struct(frame, frame_addr, 1);
4517 return;
4518
4519 give_sigsegv:
4520 unlock_user_struct(frame, frame_addr, 1);
4521 force_sig(TARGET_SIGSEGV);
4522 }
4523
4524 long do_sigreturn(CPUState *env)
4525 {
4526 struct target_sigframe *frame;
4527 abi_ulong frame_addr = env->aregs[7] - 4;
4528 target_sigset_t target_set;
4529 sigset_t set;
4530 int d0, i;
4531
4532 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
4533 goto badframe;
4534
4535 /* set blocked signals */
4536
4537 if (__get_user(target_set.sig[0], &frame->sc.sc_mask))
4538 goto badframe;
4539
4540 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
4541 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
4542 goto badframe;
4543 }
4544
4545 target_to_host_sigset_internal(&set, &target_set);
4546 sigprocmask(SIG_SETMASK, &set, NULL);
4547
4548 /* restore registers */
4549
4550 if (restore_sigcontext(env, &frame->sc, &d0))
4551 goto badframe;
4552
4553 unlock_user_struct(frame, frame_addr, 0);
4554 return d0;
4555
4556 badframe:
4557 unlock_user_struct(frame, frame_addr, 0);
4558 force_sig(TARGET_SIGSEGV);
4559 return 0;
4560 }
4561
4562 long do_rt_sigreturn(CPUState *env)
4563 {
4564 struct target_rt_sigframe *frame;
4565 abi_ulong frame_addr = env->aregs[7] - 4;
4566 target_sigset_t target_set;
4567 sigset_t set;
4568 int d0;
4569
4570 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
4571 goto badframe;
4572
4573 target_to_host_sigset_internal(&set, &target_set);
4574 sigprocmask(SIG_SETMASK, &set, NULL);
4575
4576 /* restore registers */
4577
4578 if (target_rt_restore_ucontext(env, &frame->uc, &d0))
4579 goto badframe;
4580
4581 if (do_sigaltstack(frame_addr +
4582 offsetof(struct target_rt_sigframe, uc.tuc_stack),
4583 0, get_sp_from_cpustate(env)) == -EFAULT)
4584 goto badframe;
4585
4586 unlock_user_struct(frame, frame_addr, 0);
4587 return d0;
4588
4589 badframe:
4590 unlock_user_struct(frame, frame_addr, 0);
4591 force_sig(TARGET_SIGSEGV);
4592 return 0;
4593 }
4594
4595 #elif defined(TARGET_ALPHA)
4596
4597 struct target_sigcontext {
4598 abi_long sc_onstack;
4599 abi_long sc_mask;
4600 abi_long sc_pc;
4601 abi_long sc_ps;
4602 abi_long sc_regs[32];
4603 abi_long sc_ownedfp;
4604 abi_long sc_fpregs[32];
4605 abi_ulong sc_fpcr;
4606 abi_ulong sc_fp_control;
4607 abi_ulong sc_reserved1;
4608 abi_ulong sc_reserved2;
4609 abi_ulong sc_ssize;
4610 abi_ulong sc_sbase;
4611 abi_ulong sc_traparg_a0;
4612 abi_ulong sc_traparg_a1;
4613 abi_ulong sc_traparg_a2;
4614 abi_ulong sc_fp_trap_pc;
4615 abi_ulong sc_fp_trigger_sum;
4616 abi_ulong sc_fp_trigger_inst;
4617 };
4618
4619 struct target_ucontext {
4620 abi_ulong tuc_flags;
4621 abi_ulong tuc_link;
4622 abi_ulong tuc_osf_sigmask;
4623 target_stack_t tuc_stack;
4624 struct target_sigcontext tuc_mcontext;
4625 target_sigset_t tuc_sigmask;
4626 };
4627
4628 struct target_sigframe {
4629 struct target_sigcontext sc;
4630 unsigned int retcode[3];
4631 };
4632
4633 struct target_rt_sigframe {
4634 target_siginfo_t info;
4635 struct target_ucontext uc;
4636 unsigned int retcode[3];
4637 };
4638
4639 #define INSN_MOV_R30_R16 0x47fe0410
4640 #define INSN_LDI_R0 0x201f0000
4641 #define INSN_CALLSYS 0x00000083
4642
4643 static int setup_sigcontext(struct target_sigcontext *sc, CPUState *env,
4644 abi_ulong frame_addr, target_sigset_t *set)
4645 {
4646 int i, err = 0;
4647
4648 err |= __put_user(on_sig_stack(frame_addr), &sc->sc_onstack);
4649 err |= __put_user(set->sig[0], &sc->sc_mask);
4650 err |= __put_user(env->pc, &sc->sc_pc);
4651 err |= __put_user(8, &sc->sc_ps);
4652
4653 for (i = 0; i < 31; ++i) {
4654 err |= __put_user(env->ir[i], &sc->sc_regs[i]);
4655 }
4656 err |= __put_user(0, &sc->sc_regs[31]);
4657
4658 for (i = 0; i < 31; ++i) {
4659 err |= __put_user(env->fir[i], &sc->sc_fpregs[i]);
4660 }
4661 err |= __put_user(0, &sc->sc_fpregs[31]);
4662 err |= __put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr);
4663
4664 err |= __put_user(0, &sc->sc_traparg_a0); /* FIXME */
4665 err |= __put_user(0, &sc->sc_traparg_a1); /* FIXME */
4666 err |= __put_user(0, &sc->sc_traparg_a2); /* FIXME */
4667
4668 return err;
4669 }
4670
4671 static int restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
4672 {
4673 uint64_t fpcr;
4674 int i, err = 0;
4675
4676 err |= __get_user(env->pc, &sc->sc_pc);
4677
4678 for (i = 0; i < 31; ++i) {
4679 err |= __get_user(env->ir[i], &sc->sc_regs[i]);
4680 }
4681 for (i = 0; i < 31; ++i) {
4682 err |= __get_user(env->fir[i], &sc->sc_fpregs[i]);
4683 }
4684
4685 err |= __get_user(fpcr, &sc->sc_fpcr);
4686 cpu_alpha_store_fpcr(env, fpcr);
4687
4688 return err;
4689 }
4690
4691 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
4692 CPUState *env, unsigned long framesize)
4693 {
4694 abi_ulong sp = env->ir[IR_SP];
4695
4696 /* This is the X/Open sanctioned signal stack switching. */
4697 if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) {
4698 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
4699 }
4700 return (sp - framesize) & -32;
4701 }
4702
4703 static void setup_frame(int sig, struct target_sigaction *ka,
4704 target_sigset_t *set, CPUState *env)
4705 {
4706 abi_ulong frame_addr, r26;
4707 struct target_sigframe *frame;
4708 int err = 0;
4709
4710 frame_addr = get_sigframe(ka, env, sizeof(*frame));
4711 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
4712 goto give_sigsegv;
4713 }
4714
4715 err |= setup_sigcontext(&frame->sc, env, frame_addr, set);
4716
4717 if (ka->sa_restorer) {
4718 r26 = ka->sa_restorer;
4719 } else {
4720 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
4721 err |= __put_user(INSN_LDI_R0 + TARGET_NR_sigreturn,
4722 &frame->retcode[1]);
4723 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]);
4724 /* imb() */
4725 r26 = frame_addr;
4726 }
4727
4728 unlock_user_struct(frame, frame_addr, 1);
4729
4730 if (err) {
4731 give_sigsegv:
4732 if (sig == TARGET_SIGSEGV) {
4733 ka->_sa_handler = TARGET_SIG_DFL;
4734 }
4735 force_sig(TARGET_SIGSEGV);
4736 }
4737
4738 env->ir[IR_RA] = r26;
4739 env->ir[IR_PV] = env->pc = ka->_sa_handler;
4740 env->ir[IR_A0] = sig;
4741 env->ir[IR_A1] = 0;
4742 env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc);
4743 env->ir[IR_SP] = frame_addr;
4744 }
4745
4746 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4747 target_siginfo_t *info,
4748 target_sigset_t *set, CPUState *env)
4749 {
4750 abi_ulong frame_addr, r26;
4751 struct target_rt_sigframe *frame;
4752 int i, err = 0;
4753
4754 frame_addr = get_sigframe(ka, env, sizeof(*frame));
4755 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
4756 goto give_sigsegv;
4757 }
4758
4759 err |= copy_siginfo_to_user(&frame->info, info);
4760
4761 err |= __put_user(0, &frame->uc.tuc_flags);
4762 err |= __put_user(0, &frame->uc.tuc_link);
4763 err |= __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask);
4764 err |= __put_user(target_sigaltstack_used.ss_sp,
4765 &frame->uc.tuc_stack.ss_sp);
4766 err |= __put_user(sas_ss_flags(env->ir[IR_SP]),
4767 &frame->uc.tuc_stack.ss_flags);
4768 err |= __put_user(target_sigaltstack_used.ss_size,
4769 &frame->uc.tuc_stack.ss_size);
4770 err |= setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set);
4771 for (i = 0; i < TARGET_NSIG_WORDS; ++i) {
4772 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
4773 }
4774
4775 if (ka->sa_restorer) {
4776 r26 = ka->sa_restorer;
4777 } else {
4778 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
4779 err |= __put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn,
4780 &frame->retcode[1]);
4781 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]);
4782 /* imb(); */
4783 r26 = frame_addr;
4784 }
4785
4786 if (err) {
4787 give_sigsegv:
4788 if (sig == TARGET_SIGSEGV) {
4789 ka->_sa_handler = TARGET_SIG_DFL;
4790 }
4791 force_sig(TARGET_SIGSEGV);
4792 }
4793
4794 env->ir[IR_RA] = r26;
4795 env->ir[IR_PV] = env->pc = ka->_sa_handler;
4796 env->ir[IR_A0] = sig;
4797 env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info);
4798 env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
4799 env->ir[IR_SP] = frame_addr;
4800 }
4801
4802 long do_sigreturn(CPUState *env)
4803 {
4804 struct target_sigcontext *sc;
4805 abi_ulong sc_addr = env->ir[IR_A0];
4806 target_sigset_t target_set;
4807 sigset_t set;
4808
4809 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) {
4810 goto badframe;
4811 }
4812
4813 target_sigemptyset(&target_set);
4814 if (__get_user(target_set.sig[0], &sc->sc_mask)) {
4815 goto badframe;
4816 }
4817
4818 target_to_host_sigset_internal(&set, &target_set);
4819 sigprocmask(SIG_SETMASK, &set, NULL);
4820
4821 if (restore_sigcontext(env, sc)) {
4822 goto badframe;
4823 }
4824 unlock_user_struct(sc, sc_addr, 0);
4825 return env->ir[IR_V0];
4826
4827 badframe:
4828 unlock_user_struct(sc, sc_addr, 0);
4829 force_sig(TARGET_SIGSEGV);
4830 }
4831
4832 long do_rt_sigreturn(CPUState *env)
4833 {
4834 abi_ulong frame_addr = env->ir[IR_A0];
4835 struct target_rt_sigframe *frame;
4836 sigset_t set;
4837
4838 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
4839 goto badframe;
4840 }
4841 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
4842 sigprocmask(SIG_SETMASK, &set, NULL);
4843
4844 if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
4845 goto badframe;
4846 }
4847 if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
4848 uc.tuc_stack),
4849 0, env->ir[IR_SP]) == -EFAULT) {
4850 goto badframe;
4851 }
4852
4853 unlock_user_struct(frame, frame_addr, 0);
4854 return env->ir[IR_V0];
4855
4856
4857 badframe:
4858 unlock_user_struct(frame, frame_addr, 0);
4859 force_sig(TARGET_SIGSEGV);
4860 }
4861
4862 #else
4863
4864 static void setup_frame(int sig, struct target_sigaction *ka,
4865 target_sigset_t *set, CPUState *env)
4866 {
4867 fprintf(stderr, "setup_frame: not implemented\n");
4868 }
4869
4870 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4871 target_siginfo_t *info,
4872 target_sigset_t *set, CPUState *env)
4873 {
4874 fprintf(stderr, "setup_rt_frame: not implemented\n");
4875 }
4876
4877 long do_sigreturn(CPUState *env)
4878 {
4879 fprintf(stderr, "do_sigreturn: not implemented\n");
4880 return -TARGET_ENOSYS;
4881 }
4882
4883 long do_rt_sigreturn(CPUState *env)
4884 {
4885 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
4886 return -TARGET_ENOSYS;
4887 }
4888
4889 #endif
4890
4891 void process_pending_signals(CPUState *cpu_env)
4892 {
4893 int sig;
4894 abi_ulong handler;
4895 sigset_t set, old_set;
4896 target_sigset_t target_old_set;
4897 struct emulated_sigtable *k;
4898 struct target_sigaction *sa;
4899 struct sigqueue *q;
4900 TaskState *ts = cpu_env->opaque;
4901
4902 if (!ts->signal_pending)
4903 return;
4904
4905 /* FIXME: This is not threadsafe. */
4906 k = ts->sigtab;
4907 for(sig = 1; sig <= TARGET_NSIG; sig++) {
4908 if (k->pending)
4909 goto handle_signal;
4910 k++;
4911 }
4912 /* if no signal is pending, just return */
4913 ts->signal_pending = 0;
4914 return;
4915
4916 handle_signal:
4917 #ifdef DEBUG_SIGNAL
4918 fprintf(stderr, "qemu: process signal %d\n", sig);
4919 #endif
4920 /* dequeue signal */
4921 q = k->first;
4922 k->first = q->next;
4923 if (!k->first)
4924 k->pending = 0;
4925
4926 sig = gdb_handlesig (cpu_env, sig);
4927 if (!sig) {
4928 sa = NULL;
4929 handler = TARGET_SIG_IGN;
4930 } else {
4931 sa = &sigact_table[sig - 1];
4932 handler = sa->_sa_handler;
4933 }
4934
4935 if (handler == TARGET_SIG_DFL) {
4936 /* default handler : ignore some signal. The other are job control or fatal */
4937 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
4938 kill(getpid(),SIGSTOP);
4939 } else if (sig != TARGET_SIGCHLD &&
4940 sig != TARGET_SIGURG &&
4941 sig != TARGET_SIGWINCH &&
4942 sig != TARGET_SIGCONT) {
4943 force_sig(sig);
4944 }
4945 } else if (handler == TARGET_SIG_IGN) {
4946 /* ignore sig */
4947 } else if (handler == TARGET_SIG_ERR) {
4948 force_sig(sig);
4949 } else {
4950 /* compute the blocked signals during the handler execution */
4951 target_to_host_sigset(&set, &sa->sa_mask);
4952 /* SA_NODEFER indicates that the current signal should not be
4953 blocked during the handler */
4954 if (!(sa->sa_flags & TARGET_SA_NODEFER))
4955 sigaddset(&set, target_to_host_signal(sig));
4956
4957 /* block signals in the handler using Linux */
4958 sigprocmask(SIG_BLOCK, &set, &old_set);
4959 /* save the previous blocked signal state to restore it at the
4960 end of the signal execution (see do_sigreturn) */
4961 host_to_target_sigset_internal(&target_old_set, &old_set);
4962
4963 /* if the CPU is in VM86 mode, we restore the 32 bit values */
4964 #if defined(TARGET_I386) && !defined(TARGET_X86_64)
4965 {
4966 CPUX86State *env = cpu_env;
4967 if (env->eflags & VM_MASK)
4968 save_v86_state(env);
4969 }
4970 #endif
4971 /* prepare the stack frame of the virtual CPU */
4972 if (sa->sa_flags & TARGET_SA_SIGINFO)
4973 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
4974 else
4975 setup_frame(sig, sa, &target_old_set, cpu_env);
4976 if (sa->sa_flags & TARGET_SA_RESETHAND)
4977 sa->_sa_handler = TARGET_SIG_DFL;
4978 }
4979 if (q != &k->info)
4980 free_sigqueue(cpu_env, q);
4981 }
QEmu