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qcow2: Restore total_sectors value in save_vmstate
[qemu.git] / linux-user / signal.c
blob7751c47ef14acb80ceab9e83e7ca1e5d17b4f9e2
1 /*
2 * Emulation of Linux signals
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19 #include <stdlib.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include <stdarg.h>
23 #include <unistd.h>
24 #include <errno.h>
25 #include <assert.h>
26 #include <sys/ucontext.h>
27 #include <sys/resource.h>
28
29 #include "qemu.h"
30 #include "qemu-common.h"
31 #include "target_signal.h"
32
33 //#define DEBUG_SIGNAL
34
35 static struct target_sigaltstack target_sigaltstack_used = {
36 .ss_sp = 0,
37 .ss_size = 0,
38 .ss_flags = TARGET_SS_DISABLE,
39 };
40
41 static struct target_sigaction sigact_table[TARGET_NSIG];
42
43 static void host_signal_handler(int host_signum, siginfo_t *info,
44 void *puc);
45
46 static uint8_t host_to_target_signal_table[_NSIG] = {
47 [SIGHUP] = TARGET_SIGHUP,
48 [SIGINT] = TARGET_SIGINT,
49 [SIGQUIT] = TARGET_SIGQUIT,
50 [SIGILL] = TARGET_SIGILL,
51 [SIGTRAP] = TARGET_SIGTRAP,
52 [SIGABRT] = TARGET_SIGABRT,
53 /* [SIGIOT] = TARGET_SIGIOT,*/
54 [SIGBUS] = TARGET_SIGBUS,
55 [SIGFPE] = TARGET_SIGFPE,
56 [SIGKILL] = TARGET_SIGKILL,
57 [SIGUSR1] = TARGET_SIGUSR1,
58 [SIGSEGV] = TARGET_SIGSEGV,
59 [SIGUSR2] = TARGET_SIGUSR2,
60 [SIGPIPE] = TARGET_SIGPIPE,
61 [SIGALRM] = TARGET_SIGALRM,
62 [SIGTERM] = TARGET_SIGTERM,
63 #ifdef SIGSTKFLT
64 [SIGSTKFLT] = TARGET_SIGSTKFLT,
65 #endif
66 [SIGCHLD] = TARGET_SIGCHLD,
67 [SIGCONT] = TARGET_SIGCONT,
68 [SIGSTOP] = TARGET_SIGSTOP,
69 [SIGTSTP] = TARGET_SIGTSTP,
70 [SIGTTIN] = TARGET_SIGTTIN,
71 [SIGTTOU] = TARGET_SIGTTOU,
72 [SIGURG] = TARGET_SIGURG,
73 [SIGXCPU] = TARGET_SIGXCPU,
74 [SIGXFSZ] = TARGET_SIGXFSZ,
75 [SIGVTALRM] = TARGET_SIGVTALRM,
76 [SIGPROF] = TARGET_SIGPROF,
77 [SIGWINCH] = TARGET_SIGWINCH,
78 [SIGIO] = TARGET_SIGIO,
79 [SIGPWR] = TARGET_SIGPWR,
80 [SIGSYS] = TARGET_SIGSYS,
81 /* next signals stay the same */
82 /* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with
83 host libpthread signals. This assumes no one actually uses SIGRTMAX :-/
84 To fix this properly we need to do manual signal delivery multiplexed
85 over a single host signal. */
86 [__SIGRTMIN] = __SIGRTMAX,
87 [__SIGRTMAX] = __SIGRTMIN,
88 };
89 static uint8_t target_to_host_signal_table[_NSIG];
90
91 static inline int on_sig_stack(unsigned long sp)
92 {
93 return (sp - target_sigaltstack_used.ss_sp
94 < target_sigaltstack_used.ss_size);
95 }
96
97 static inline int sas_ss_flags(unsigned long sp)
98 {
99 return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE
100 : on_sig_stack(sp) ? SS_ONSTACK : 0);
101 }
102
103 int host_to_target_signal(int sig)
104 {
105 if (sig < 0 || sig >= _NSIG)
106 return sig;
107 return host_to_target_signal_table[sig];
108 }
109
110 int target_to_host_signal(int sig)
111 {
112 if (sig < 0 || sig >= _NSIG)
113 return sig;
114 return target_to_host_signal_table[sig];
115 }
116
117 static inline void target_sigemptyset(target_sigset_t *set)
118 {
119 memset(set, 0, sizeof(*set));
120 }
121
122 static inline void target_sigaddset(target_sigset_t *set, int signum)
123 {
124 signum--;
125 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
126 set->sig[signum / TARGET_NSIG_BPW] |= mask;
127 }
128
129 static inline int target_sigismember(const target_sigset_t *set, int signum)
130 {
131 signum--;
132 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
133 return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0);
134 }
135
136 static void host_to_target_sigset_internal(target_sigset_t *d,
137 const sigset_t *s)
138 {
139 int i;
140 target_sigemptyset(d);
141 for (i = 1; i <= TARGET_NSIG; i++) {
142 if (sigismember(s, i)) {
143 target_sigaddset(d, host_to_target_signal(i));
144 }
145 }
146 }
147
148 void host_to_target_sigset(target_sigset_t *d, const sigset_t *s)
149 {
150 target_sigset_t d1;
151 int i;
152
153 host_to_target_sigset_internal(&d1, s);
154 for(i = 0;i < TARGET_NSIG_WORDS; i++)
155 d->sig[i] = tswapal(d1.sig[i]);
156 }
157
158 static void target_to_host_sigset_internal(sigset_t *d,
159 const target_sigset_t *s)
160 {
161 int i;
162 sigemptyset(d);
163 for (i = 1; i <= TARGET_NSIG; i++) {
164 if (target_sigismember(s, i)) {
165 sigaddset(d, target_to_host_signal(i));
166 }
167 }
168 }
169
170 void target_to_host_sigset(sigset_t *d, const target_sigset_t *s)
171 {
172 target_sigset_t s1;
173 int i;
174
175 for(i = 0;i < TARGET_NSIG_WORDS; i++)
176 s1.sig[i] = tswapal(s->sig[i]);
177 target_to_host_sigset_internal(d, &s1);
178 }
179
180 void host_to_target_old_sigset(abi_ulong *old_sigset,
181 const sigset_t *sigset)
182 {
183 target_sigset_t d;
184 host_to_target_sigset(&d, sigset);
185 *old_sigset = d.sig[0];
186 }
187
188 void target_to_host_old_sigset(sigset_t *sigset,
189 const abi_ulong *old_sigset)
190 {
191 target_sigset_t d;
192 int i;
193
194 d.sig[0] = *old_sigset;
195 for(i = 1;i < TARGET_NSIG_WORDS; i++)
196 d.sig[i] = 0;
197 target_to_host_sigset(sigset, &d);
198 }
199
200 /* siginfo conversion */
201
202 static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
203 const siginfo_t *info)
204 {
205 int sig = host_to_target_signal(info->si_signo);
206 tinfo->si_signo = sig;
207 tinfo->si_errno = 0;
208 tinfo->si_code = info->si_code;
209
210 if (sig == TARGET_SIGILL || sig == TARGET_SIGFPE || sig == TARGET_SIGSEGV
211 || sig == TARGET_SIGBUS || sig == TARGET_SIGTRAP) {
212 /* Should never come here, but who knows. The information for
213 the target is irrelevant. */
214 tinfo->_sifields._sigfault._addr = 0;
215 } else if (sig == TARGET_SIGIO) {
216 tinfo->_sifields._sigpoll._band = info->si_band;
217 tinfo->_sifields._sigpoll._fd = info->si_fd;
218 } else if (sig == TARGET_SIGCHLD) {
219 tinfo->_sifields._sigchld._pid = info->si_pid;
220 tinfo->_sifields._sigchld._uid = info->si_uid;
221 tinfo->_sifields._sigchld._status
222 = host_to_target_waitstatus(info->si_status);
223 tinfo->_sifields._sigchld._utime = info->si_utime;
224 tinfo->_sifields._sigchld._stime = info->si_stime;
225 } else if (sig >= TARGET_SIGRTMIN) {
226 tinfo->_sifields._rt._pid = info->si_pid;
227 tinfo->_sifields._rt._uid = info->si_uid;
228 /* XXX: potential problem if 64 bit */
229 tinfo->_sifields._rt._sigval.sival_ptr
230 = (abi_ulong)(unsigned long)info->si_value.sival_ptr;
231 }
232 }
233
234 static void tswap_siginfo(target_siginfo_t *tinfo,
235 const target_siginfo_t *info)
236 {
237 int sig = info->si_signo;
238 tinfo->si_signo = tswap32(sig);
239 tinfo->si_errno = tswap32(info->si_errno);
240 tinfo->si_code = tswap32(info->si_code);
241
242 if (sig == TARGET_SIGILL || sig == TARGET_SIGFPE || sig == TARGET_SIGSEGV
243 || sig == TARGET_SIGBUS || sig == TARGET_SIGTRAP) {
244 tinfo->_sifields._sigfault._addr
245 = tswapal(info->_sifields._sigfault._addr);
246 } else if (sig == TARGET_SIGIO) {
247 tinfo->_sifields._sigpoll._band
248 = tswap32(info->_sifields._sigpoll._band);
249 tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
250 } else if (sig == TARGET_SIGCHLD) {
251 tinfo->_sifields._sigchld._pid
252 = tswap32(info->_sifields._sigchld._pid);
253 tinfo->_sifields._sigchld._uid
254 = tswap32(info->_sifields._sigchld._uid);
255 tinfo->_sifields._sigchld._status
256 = tswap32(info->_sifields._sigchld._status);
257 tinfo->_sifields._sigchld._utime
258 = tswapal(info->_sifields._sigchld._utime);
259 tinfo->_sifields._sigchld._stime
260 = tswapal(info->_sifields._sigchld._stime);
261 } else if (sig >= TARGET_SIGRTMIN) {
262 tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid);
263 tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid);
264 tinfo->_sifields._rt._sigval.sival_ptr
265 = tswapal(info->_sifields._rt._sigval.sival_ptr);
266 }
267 }
268
269
270 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info)
271 {
272 host_to_target_siginfo_noswap(tinfo, info);
273 tswap_siginfo(tinfo, tinfo);
274 }
275
276 /* XXX: we support only POSIX RT signals are used. */
277 /* XXX: find a solution for 64 bit (additional malloced data is needed) */
278 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo)
279 {
280 info->si_signo = tswap32(tinfo->si_signo);
281 info->si_errno = tswap32(tinfo->si_errno);
282 info->si_code = tswap32(tinfo->si_code);
283 info->si_pid = tswap32(tinfo->_sifields._rt._pid);
284 info->si_uid = tswap32(tinfo->_sifields._rt._uid);
285 info->si_value.sival_ptr =
286 (void *)(long)tswapal(tinfo->_sifields._rt._sigval.sival_ptr);
287 }
288
289 static int fatal_signal (int sig)
290 {
291 switch (sig) {
292 case TARGET_SIGCHLD:
293 case TARGET_SIGURG:
294 case TARGET_SIGWINCH:
295 /* Ignored by default. */
296 return 0;
297 case TARGET_SIGCONT:
298 case TARGET_SIGSTOP:
299 case TARGET_SIGTSTP:
300 case TARGET_SIGTTIN:
301 case TARGET_SIGTTOU:
302 /* Job control signals. */
303 return 0;
304 default:
305 return 1;
306 }
307 }
308
309 /* returns 1 if given signal should dump core if not handled */
310 static int core_dump_signal(int sig)
311 {
312 switch (sig) {
313 case TARGET_SIGABRT:
314 case TARGET_SIGFPE:
315 case TARGET_SIGILL:
316 case TARGET_SIGQUIT:
317 case TARGET_SIGSEGV:
318 case TARGET_SIGTRAP:
319 case TARGET_SIGBUS:
320 return (1);
321 default:
322 return (0);
323 }
324 }
325
326 void signal_init(void)
327 {
328 struct sigaction act;
329 struct sigaction oact;
330 int i, j;
331 int host_sig;
332
333 /* generate signal conversion tables */
334 for(i = 1; i < _NSIG; i++) {
335 if (host_to_target_signal_table[i] == 0)
336 host_to_target_signal_table[i] = i;
337 }
338 for(i = 1; i < _NSIG; i++) {
339 j = host_to_target_signal_table[i];
340 target_to_host_signal_table[j] = i;
341 }
342
343 /* set all host signal handlers. ALL signals are blocked during
344 the handlers to serialize them. */
345 memset(sigact_table, 0, sizeof(sigact_table));
346
347 sigfillset(&act.sa_mask);
348 act.sa_flags = SA_SIGINFO;
349 act.sa_sigaction = host_signal_handler;
350 for(i = 1; i <= TARGET_NSIG; i++) {
351 host_sig = target_to_host_signal(i);
352 sigaction(host_sig, NULL, &oact);
353 if (oact.sa_sigaction == (void *)SIG_IGN) {
354 sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
355 } else if (oact.sa_sigaction == (void *)SIG_DFL) {
356 sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
357 }
358 /* If there's already a handler installed then something has
359 gone horribly wrong, so don't even try to handle that case. */
360 /* Install some handlers for our own use. We need at least
361 SIGSEGV and SIGBUS, to detect exceptions. We can not just
362 trap all signals because it affects syscall interrupt
363 behavior. But do trap all default-fatal signals. */
364 if (fatal_signal (i))
365 sigaction(host_sig, &act, NULL);
366 }
367 }
368
369 /* signal queue handling */
370
371 static inline struct sigqueue *alloc_sigqueue(CPUArchState *env)
372 {
373 TaskState *ts = env->opaque;
374 struct sigqueue *q = ts->first_free;
375 if (!q)
376 return NULL;
377 ts->first_free = q->next;
378 return q;
379 }
380
381 static inline void free_sigqueue(CPUArchState *env, struct sigqueue *q)
382 {
383 TaskState *ts = env->opaque;
384 q->next = ts->first_free;
385 ts->first_free = q;
386 }
387
388 /* abort execution with signal */
389 static void QEMU_NORETURN force_sig(int target_sig)
390 {
391 CPUArchState *env = thread_cpu->env_ptr;
392 TaskState *ts = (TaskState *)env->opaque;
393 int host_sig, core_dumped = 0;
394 struct sigaction act;
395 host_sig = target_to_host_signal(target_sig);
396 gdb_signalled(env, target_sig);
397
398 /* dump core if supported by target binary format */
399 if (core_dump_signal(target_sig) && (ts->bprm->core_dump != NULL)) {
400 stop_all_tasks();
401 core_dumped =
402 ((*ts->bprm->core_dump)(target_sig, env) == 0);
403 }
404 if (core_dumped) {
405 /* we already dumped the core of target process, we don't want
406 * a coredump of qemu itself */
407 struct rlimit nodump;
408 getrlimit(RLIMIT_CORE, &nodump);
409 nodump.rlim_cur=0;
410 setrlimit(RLIMIT_CORE, &nodump);
411 (void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n",
412 target_sig, strsignal(host_sig), "core dumped" );
413 }
414
415 /* The proper exit code for dying from an uncaught signal is
416 * -<signal>. The kernel doesn't allow exit() or _exit() to pass
417 * a negative value. To get the proper exit code we need to
418 * actually die from an uncaught signal. Here the default signal
419 * handler is installed, we send ourself a signal and we wait for
420 * it to arrive. */
421 sigfillset(&act.sa_mask);
422 act.sa_handler = SIG_DFL;
423 sigaction(host_sig, &act, NULL);
424
425 /* For some reason raise(host_sig) doesn't send the signal when
426 * statically linked on x86-64. */
427 kill(getpid(), host_sig);
428
429 /* Make sure the signal isn't masked (just reuse the mask inside
430 of act) */
431 sigdelset(&act.sa_mask, host_sig);
432 sigsuspend(&act.sa_mask);
433
434 /* unreachable */
435 abort();
436 }
437
438 /* queue a signal so that it will be send to the virtual CPU as soon
439 as possible */
440 int queue_signal(CPUArchState *env, int sig, target_siginfo_t *info)
441 {
442 TaskState *ts = env->opaque;
443 struct emulated_sigtable *k;
444 struct sigqueue *q, **pq;
445 abi_ulong handler;
446 int queue;
447
448 #if defined(DEBUG_SIGNAL)
449 fprintf(stderr, "queue_signal: sig=%d\n",
450 sig);
451 #endif
452 k = &ts->sigtab[sig - 1];
453 queue = gdb_queuesig ();
454 handler = sigact_table[sig - 1]._sa_handler;
455 if (!queue && handler == TARGET_SIG_DFL) {
456 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
457 kill(getpid(),SIGSTOP);
458 return 0;
459 } else
460 /* default handler : ignore some signal. The other are fatal */
461 if (sig != TARGET_SIGCHLD &&
462 sig != TARGET_SIGURG &&
463 sig != TARGET_SIGWINCH &&
464 sig != TARGET_SIGCONT) {
465 force_sig(sig);
466 } else {
467 return 0; /* indicate ignored */
468 }
469 } else if (!queue && handler == TARGET_SIG_IGN) {
470 /* ignore signal */
471 return 0;
472 } else if (!queue && handler == TARGET_SIG_ERR) {
473 force_sig(sig);
474 } else {
475 pq = &k->first;
476 if (sig < TARGET_SIGRTMIN) {
477 /* if non real time signal, we queue exactly one signal */
478 if (!k->pending)
479 q = &k->info;
480 else
481 return 0;
482 } else {
483 if (!k->pending) {
484 /* first signal */
485 q = &k->info;
486 } else {
487 q = alloc_sigqueue(env);
488 if (!q)
489 return -EAGAIN;
490 while (*pq != NULL)
491 pq = &(*pq)->next;
492 }
493 }
494 *pq = q;
495 q->info = *info;
496 q->next = NULL;
497 k->pending = 1;
498 /* signal that a new signal is pending */
499 ts->signal_pending = 1;
500 return 1; /* indicates that the signal was queued */
501 }
502 }
503
504 static void host_signal_handler(int host_signum, siginfo_t *info,
505 void *puc)
506 {
507 CPUArchState *env = thread_cpu->env_ptr;
508 int sig;
509 target_siginfo_t tinfo;
510
511 /* the CPU emulator uses some host signals to detect exceptions,
512 we forward to it some signals */
513 if ((host_signum == SIGSEGV || host_signum == SIGBUS)
514 && info->si_code > 0) {
515 if (cpu_signal_handler(host_signum, info, puc))
516 return;
517 }
518
519 /* get target signal number */
520 sig = host_to_target_signal(host_signum);
521 if (sig < 1 || sig > TARGET_NSIG)
522 return;
523 #if defined(DEBUG_SIGNAL)
524 fprintf(stderr, "qemu: got signal %d\n", sig);
525 #endif
526 host_to_target_siginfo_noswap(&tinfo, info);
527 if (queue_signal(env, sig, &tinfo) == 1) {
528 /* interrupt the virtual CPU as soon as possible */
529 cpu_exit(thread_cpu);
530 }
531 }
532
533 /* do_sigaltstack() returns target values and errnos. */
534 /* compare linux/kernel/signal.c:do_sigaltstack() */
535 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
536 {
537 int ret;
538 struct target_sigaltstack oss;
539
540 /* XXX: test errors */
541 if(uoss_addr)
542 {
543 __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
544 __put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
545 __put_user(sas_ss_flags(sp), &oss.ss_flags);
546 }
547
548 if(uss_addr)
549 {
550 struct target_sigaltstack *uss;
551 struct target_sigaltstack ss;
552
553 ret = -TARGET_EFAULT;
554 if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)
555 || __get_user(ss.ss_sp, &uss->ss_sp)
556 || __get_user(ss.ss_size, &uss->ss_size)
557 || __get_user(ss.ss_flags, &uss->ss_flags))
558 goto out;
559 unlock_user_struct(uss, uss_addr, 0);
560
561 ret = -TARGET_EPERM;
562 if (on_sig_stack(sp))
563 goto out;
564
565 ret = -TARGET_EINVAL;
566 if (ss.ss_flags != TARGET_SS_DISABLE
567 && ss.ss_flags != TARGET_SS_ONSTACK
568 && ss.ss_flags != 0)
569 goto out;
570
571 if (ss.ss_flags == TARGET_SS_DISABLE) {
572 ss.ss_size = 0;
573 ss.ss_sp = 0;
574 } else {
575 ret = -TARGET_ENOMEM;
576 if (ss.ss_size < MINSIGSTKSZ)
577 goto out;
578 }
579
580 target_sigaltstack_used.ss_sp = ss.ss_sp;
581 target_sigaltstack_used.ss_size = ss.ss_size;
582 }
583
584 if (uoss_addr) {
585 ret = -TARGET_EFAULT;
586 if (copy_to_user(uoss_addr, &oss, sizeof(oss)))
587 goto out;
588 }
589
590 ret = 0;
591 out:
592 return ret;
593 }
594
595 /* do_sigaction() return host values and errnos */
596 int do_sigaction(int sig, const struct target_sigaction *act,
597 struct target_sigaction *oact)
598 {
599 struct target_sigaction *k;
600 struct sigaction act1;
601 int host_sig;
602 int ret = 0;
603
604 if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP)
605 return -EINVAL;
606 k = &sigact_table[sig - 1];
607 #if defined(DEBUG_SIGNAL)
608 fprintf(stderr, "sigaction sig=%d act=0x%p, oact=0x%p\n",
609 sig, act, oact);
610 #endif
611 if (oact) {
612 __put_user(k->_sa_handler, &oact->_sa_handler);
613 __put_user(k->sa_flags, &oact->sa_flags);
614 #if !defined(TARGET_MIPS)
615 __put_user(k->sa_restorer, &oact->sa_restorer);
616 #endif
617 /* Not swapped. */
618 oact->sa_mask = k->sa_mask;
619 }
620 if (act) {
621 /* FIXME: This is not threadsafe. */
622 __get_user(k->_sa_handler, &act->_sa_handler);
623 __get_user(k->sa_flags, &act->sa_flags);
624 #if !defined(TARGET_MIPS)
625 __get_user(k->sa_restorer, &act->sa_restorer);
626 #endif
627 /* To be swapped in target_to_host_sigset. */
628 k->sa_mask = act->sa_mask;
629
630 /* we update the host linux signal state */
631 host_sig = target_to_host_signal(sig);
632 if (host_sig != SIGSEGV && host_sig != SIGBUS) {
633 sigfillset(&act1.sa_mask);
634 act1.sa_flags = SA_SIGINFO;
635 if (k->sa_flags & TARGET_SA_RESTART)
636 act1.sa_flags |= SA_RESTART;
637 /* NOTE: it is important to update the host kernel signal
638 ignore state to avoid getting unexpected interrupted
639 syscalls */
640 if (k->_sa_handler == TARGET_SIG_IGN) {
641 act1.sa_sigaction = (void *)SIG_IGN;
642 } else if (k->_sa_handler == TARGET_SIG_DFL) {
643 if (fatal_signal (sig))
644 act1.sa_sigaction = host_signal_handler;
645 else
646 act1.sa_sigaction = (void *)SIG_DFL;
647 } else {
648 act1.sa_sigaction = host_signal_handler;
649 }
650 ret = sigaction(host_sig, &act1, NULL);
651 }
652 }
653 return ret;
654 }
655
656 static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
657 const target_siginfo_t *info)
658 {
659 tswap_siginfo(tinfo, info);
660 return 0;
661 }
662
663 static inline int current_exec_domain_sig(int sig)
664 {
665 return /* current->exec_domain && current->exec_domain->signal_invmap
666 && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
667 }
668
669 #if defined(TARGET_I386) && TARGET_ABI_BITS == 32
670
671 /* from the Linux kernel */
672
673 struct target_fpreg {
674 uint16_t significand[4];
675 uint16_t exponent;
676 };
677
678 struct target_fpxreg {
679 uint16_t significand[4];
680 uint16_t exponent;
681 uint16_t padding[3];
682 };
683
684 struct target_xmmreg {
685 abi_ulong element[4];
686 };
687
688 struct target_fpstate {
689 /* Regular FPU environment */
690 abi_ulong cw;
691 abi_ulong sw;
692 abi_ulong tag;
693 abi_ulong ipoff;
694 abi_ulong cssel;
695 abi_ulong dataoff;
696 abi_ulong datasel;
697 struct target_fpreg _st[8];
698 uint16_t status;
699 uint16_t magic; /* 0xffff = regular FPU data only */
700
701 /* FXSR FPU environment */
702 abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
703 abi_ulong mxcsr;
704 abi_ulong reserved;
705 struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
706 struct target_xmmreg _xmm[8];
707 abi_ulong padding[56];
708 };
709
710 #define X86_FXSR_MAGIC 0x0000
711
712 struct target_sigcontext {
713 uint16_t gs, __gsh;
714 uint16_t fs, __fsh;
715 uint16_t es, __esh;
716 uint16_t ds, __dsh;
717 abi_ulong edi;
718 abi_ulong esi;
719 abi_ulong ebp;
720 abi_ulong esp;
721 abi_ulong ebx;
722 abi_ulong edx;
723 abi_ulong ecx;
724 abi_ulong eax;
725 abi_ulong trapno;
726 abi_ulong err;
727 abi_ulong eip;
728 uint16_t cs, __csh;
729 abi_ulong eflags;
730 abi_ulong esp_at_signal;
731 uint16_t ss, __ssh;
732 abi_ulong fpstate; /* pointer */
733 abi_ulong oldmask;
734 abi_ulong cr2;
735 };
736
737 struct target_ucontext {
738 abi_ulong tuc_flags;
739 abi_ulong tuc_link;
740 target_stack_t tuc_stack;
741 struct target_sigcontext tuc_mcontext;
742 target_sigset_t tuc_sigmask; /* mask last for extensibility */
743 };
744
745 struct sigframe
746 {
747 abi_ulong pretcode;
748 int sig;
749 struct target_sigcontext sc;
750 struct target_fpstate fpstate;
751 abi_ulong extramask[TARGET_NSIG_WORDS-1];
752 char retcode[8];
753 };
754
755 struct rt_sigframe
756 {
757 abi_ulong pretcode;
758 int sig;
759 abi_ulong pinfo;
760 abi_ulong puc;
761 struct target_siginfo info;
762 struct target_ucontext uc;
763 struct target_fpstate fpstate;
764 char retcode[8];
765 };
766
767 /*
768 * Set up a signal frame.
769 */
770
771 /* XXX: save x87 state */
772 static int
773 setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
774 CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr)
775 {
776 int err = 0;
777 uint16_t magic;
778
779 /* already locked in setup_frame() */
780 err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
781 err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
782 err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
783 err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
784 err |= __put_user(env->regs[R_EDI], &sc->edi);
785 err |= __put_user(env->regs[R_ESI], &sc->esi);
786 err |= __put_user(env->regs[R_EBP], &sc->ebp);
787 err |= __put_user(env->regs[R_ESP], &sc->esp);
788 err |= __put_user(env->regs[R_EBX], &sc->ebx);
789 err |= __put_user(env->regs[R_EDX], &sc->edx);
790 err |= __put_user(env->regs[R_ECX], &sc->ecx);
791 err |= __put_user(env->regs[R_EAX], &sc->eax);
792 err |= __put_user(env->exception_index, &sc->trapno);
793 err |= __put_user(env->error_code, &sc->err);
794 err |= __put_user(env->eip, &sc->eip);
795 err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
796 err |= __put_user(env->eflags, &sc->eflags);
797 err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
798 err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
799
800 cpu_x86_fsave(env, fpstate_addr, 1);
801 fpstate->status = fpstate->sw;
802 magic = 0xffff;
803 err |= __put_user(magic, &fpstate->magic);
804 err |= __put_user(fpstate_addr, &sc->fpstate);
805
806 /* non-iBCS2 extensions.. */
807 err |= __put_user(mask, &sc->oldmask);
808 err |= __put_user(env->cr[2], &sc->cr2);
809 return err;
810 }
811
812 /*
813 * Determine which stack to use..
814 */
815
816 static inline abi_ulong
817 get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
818 {
819 unsigned long esp;
820
821 /* Default to using normal stack */
822 esp = env->regs[R_ESP];
823 /* This is the X/Open sanctioned signal stack switching. */
824 if (ka->sa_flags & TARGET_SA_ONSTACK) {
825 if (sas_ss_flags(esp) == 0)
826 esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
827 }
828
829 /* This is the legacy signal stack switching. */
830 else
831 if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
832 !(ka->sa_flags & TARGET_SA_RESTORER) &&
833 ka->sa_restorer) {
834 esp = (unsigned long) ka->sa_restorer;
835 }
836 return (esp - frame_size) & -8ul;
837 }
838
839 /* compare linux/arch/i386/kernel/signal.c:setup_frame() */
840 static void setup_frame(int sig, struct target_sigaction *ka,
841 target_sigset_t *set, CPUX86State *env)
842 {
843 abi_ulong frame_addr;
844 struct sigframe *frame;
845 int i, err = 0;
846
847 frame_addr = get_sigframe(ka, env, sizeof(*frame));
848
849 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
850 goto give_sigsegv;
851
852 err |= __put_user(current_exec_domain_sig(sig),
853 &frame->sig);
854 if (err)
855 goto give_sigsegv;
856
857 setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
858 frame_addr + offsetof(struct sigframe, fpstate));
859 if (err)
860 goto give_sigsegv;
861
862 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
863 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
864 goto give_sigsegv;
865 }
866
867 /* Set up to return from userspace. If provided, use a stub
868 already in userspace. */
869 if (ka->sa_flags & TARGET_SA_RESTORER) {
870 err |= __put_user(ka->sa_restorer, &frame->pretcode);
871 } else {
872 uint16_t val16;
873 abi_ulong retcode_addr;
874 retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
875 err |= __put_user(retcode_addr, &frame->pretcode);
876 /* This is popl %eax ; movl $,%eax ; int $0x80 */
877 val16 = 0xb858;
878 err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
879 err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
880 val16 = 0x80cd;
881 err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
882 }
883
884 if (err)
885 goto give_sigsegv;
886
887 /* Set up registers for signal handler */
888 env->regs[R_ESP] = frame_addr;
889 env->eip = ka->_sa_handler;
890
891 cpu_x86_load_seg(env, R_DS, __USER_DS);
892 cpu_x86_load_seg(env, R_ES, __USER_DS);
893 cpu_x86_load_seg(env, R_SS, __USER_DS);
894 cpu_x86_load_seg(env, R_CS, __USER_CS);
895 env->eflags &= ~TF_MASK;
896
897 unlock_user_struct(frame, frame_addr, 1);
898
899 return;
900
901 give_sigsegv:
902 unlock_user_struct(frame, frame_addr, 1);
903 if (sig == TARGET_SIGSEGV)
904 ka->_sa_handler = TARGET_SIG_DFL;
905 force_sig(TARGET_SIGSEGV /* , current */);
906 }
907
908 /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
909 static void setup_rt_frame(int sig, struct target_sigaction *ka,
910 target_siginfo_t *info,
911 target_sigset_t *set, CPUX86State *env)
912 {
913 abi_ulong frame_addr, addr;
914 struct rt_sigframe *frame;
915 int i, err = 0;
916
917 frame_addr = get_sigframe(ka, env, sizeof(*frame));
918
919 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
920 goto give_sigsegv;
921
922 err |= __put_user(current_exec_domain_sig(sig),
923 &frame->sig);
924 addr = frame_addr + offsetof(struct rt_sigframe, info);
925 err |= __put_user(addr, &frame->pinfo);
926 addr = frame_addr + offsetof(struct rt_sigframe, uc);
927 err |= __put_user(addr, &frame->puc);
928 err |= copy_siginfo_to_user(&frame->info, info);
929 if (err)
930 goto give_sigsegv;
931
932 /* Create the ucontext. */
933 err |= __put_user(0, &frame->uc.tuc_flags);
934 err |= __put_user(0, &frame->uc.tuc_link);
935 err |= __put_user(target_sigaltstack_used.ss_sp,
936 &frame->uc.tuc_stack.ss_sp);
937 err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
938 &frame->uc.tuc_stack.ss_flags);
939 err |= __put_user(target_sigaltstack_used.ss_size,
940 &frame->uc.tuc_stack.ss_size);
941 err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
942 env, set->sig[0],
943 frame_addr + offsetof(struct rt_sigframe, fpstate));
944 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
945 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
946 goto give_sigsegv;
947 }
948
949 /* Set up to return from userspace. If provided, use a stub
950 already in userspace. */
951 if (ka->sa_flags & TARGET_SA_RESTORER) {
952 err |= __put_user(ka->sa_restorer, &frame->pretcode);
953 } else {
954 uint16_t val16;
955 addr = frame_addr + offsetof(struct rt_sigframe, retcode);
956 err |= __put_user(addr, &frame->pretcode);
957 /* This is movl $,%eax ; int $0x80 */
958 err |= __put_user(0xb8, (char *)(frame->retcode+0));
959 err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
960 val16 = 0x80cd;
961 err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
962 }
963
964 if (err)
965 goto give_sigsegv;
966
967 /* Set up registers for signal handler */
968 env->regs[R_ESP] = frame_addr;
969 env->eip = ka->_sa_handler;
970
971 cpu_x86_load_seg(env, R_DS, __USER_DS);
972 cpu_x86_load_seg(env, R_ES, __USER_DS);
973 cpu_x86_load_seg(env, R_SS, __USER_DS);
974 cpu_x86_load_seg(env, R_CS, __USER_CS);
975 env->eflags &= ~TF_MASK;
976
977 unlock_user_struct(frame, frame_addr, 1);
978
979 return;
980
981 give_sigsegv:
982 unlock_user_struct(frame, frame_addr, 1);
983 if (sig == TARGET_SIGSEGV)
984 ka->_sa_handler = TARGET_SIG_DFL;
985 force_sig(TARGET_SIGSEGV /* , current */);
986 }
987
988 static int
989 restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
990 {
991 unsigned int err = 0;
992 abi_ulong fpstate_addr;
993 unsigned int tmpflags;
994
995 cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
996 cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
997 cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
998 cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
999
1000 env->regs[R_EDI] = tswapl(sc->edi);
1001 env->regs[R_ESI] = tswapl(sc->esi);
1002 env->regs[R_EBP] = tswapl(sc->ebp);
1003 env->regs[R_ESP] = tswapl(sc->esp);
1004 env->regs[R_EBX] = tswapl(sc->ebx);
1005 env->regs[R_EDX] = tswapl(sc->edx);
1006 env->regs[R_ECX] = tswapl(sc->ecx);
1007 env->eip = tswapl(sc->eip);
1008
1009 cpu_x86_load_seg(env, R_CS, lduw_p(&sc->cs) | 3);
1010 cpu_x86_load_seg(env, R_SS, lduw_p(&sc->ss) | 3);
1011
1012 tmpflags = tswapl(sc->eflags);
1013 env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
1014 // regs->orig_eax = -1; /* disable syscall checks */
1015
1016 fpstate_addr = tswapl(sc->fpstate);
1017 if (fpstate_addr != 0) {
1018 if (!access_ok(VERIFY_READ, fpstate_addr,
1019 sizeof(struct target_fpstate)))
1020 goto badframe;
1021 cpu_x86_frstor(env, fpstate_addr, 1);
1022 }
1023
1024 *peax = tswapl(sc->eax);
1025 return err;
1026 badframe:
1027 return 1;
1028 }
1029
1030 long do_sigreturn(CPUX86State *env)
1031 {
1032 struct sigframe *frame;
1033 abi_ulong frame_addr = env->regs[R_ESP] - 8;
1034 target_sigset_t target_set;
1035 sigset_t set;
1036 int eax, i;
1037
1038 #if defined(DEBUG_SIGNAL)
1039 fprintf(stderr, "do_sigreturn\n");
1040 #endif
1041 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1042 goto badframe;
1043 /* set blocked signals */
1044 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
1045 goto badframe;
1046 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1047 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
1048 goto badframe;
1049 }
1050
1051 target_to_host_sigset_internal(&set, &target_set);
1052 sigprocmask(SIG_SETMASK, &set, NULL);
1053
1054 /* restore registers */
1055 if (restore_sigcontext(env, &frame->sc, &eax))
1056 goto badframe;
1057 unlock_user_struct(frame, frame_addr, 0);
1058 return eax;
1059
1060 badframe:
1061 unlock_user_struct(frame, frame_addr, 0);
1062 force_sig(TARGET_SIGSEGV);
1063 return 0;
1064 }
1065
1066 long do_rt_sigreturn(CPUX86State *env)
1067 {
1068 abi_ulong frame_addr;
1069 struct rt_sigframe *frame;
1070 sigset_t set;
1071 int eax;
1072
1073 frame_addr = env->regs[R_ESP] - 4;
1074 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1075 goto badframe;
1076 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
1077 sigprocmask(SIG_SETMASK, &set, NULL);
1078
1079 if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
1080 goto badframe;
1081
1082 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
1083 get_sp_from_cpustate(env)) == -EFAULT)
1084 goto badframe;
1085
1086 unlock_user_struct(frame, frame_addr, 0);
1087 return eax;
1088
1089 badframe:
1090 unlock_user_struct(frame, frame_addr, 0);
1091 force_sig(TARGET_SIGSEGV);
1092 return 0;
1093 }
1094
1095 #elif defined(TARGET_AARCH64)
1096
1097 struct target_sigcontext {
1098 uint64_t fault_address;
1099 /* AArch64 registers */
1100 uint64_t regs[31];
1101 uint64_t sp;
1102 uint64_t pc;
1103 uint64_t pstate;
1104 /* 4K reserved for FP/SIMD state and future expansion */
1105 char __reserved[4096] __attribute__((__aligned__(16)));
1106 };
1107
1108 struct target_ucontext {
1109 abi_ulong tuc_flags;
1110 abi_ulong tuc_link;
1111 target_stack_t tuc_stack;
1112 target_sigset_t tuc_sigmask;
1113 /* glibc uses a 1024-bit sigset_t */
1114 char __unused[1024 / 8 - sizeof(target_sigset_t)];
1115 /* last for future expansion */
1116 struct target_sigcontext tuc_mcontext;
1117 };
1118
1119 /*
1120 * Header to be used at the beginning of structures extending the user
1121 * context. Such structures must be placed after the rt_sigframe on the stack
1122 * and be 16-byte aligned. The last structure must be a dummy one with the
1123 * magic and size set to 0.
1124 */
1125 struct target_aarch64_ctx {
1126 uint32_t magic;
1127 uint32_t size;
1128 };
1129
1130 #define TARGET_FPSIMD_MAGIC 0x46508001
1131
1132 struct target_fpsimd_context {
1133 struct target_aarch64_ctx head;
1134 uint32_t fpsr;
1135 uint32_t fpcr;
1136 uint64_t vregs[32 * 2]; /* really uint128_t vregs[32] */
1137 };
1138
1139 /*
1140 * Auxiliary context saved in the sigcontext.__reserved array. Not exported to
1141 * user space as it will change with the addition of new context. User space
1142 * should check the magic/size information.
1143 */
1144 struct target_aux_context {
1145 struct target_fpsimd_context fpsimd;
1146 /* additional context to be added before "end" */
1147 struct target_aarch64_ctx end;
1148 };
1149
1150 struct target_rt_sigframe {
1151 struct target_siginfo info;
1152 struct target_ucontext uc;
1153 uint64_t fp;
1154 uint64_t lr;
1155 uint32_t tramp[2];
1156 };
1157
1158 static int target_setup_sigframe(struct target_rt_sigframe *sf,
1159 CPUARMState *env, target_sigset_t *set)
1160 {
1161 int i;
1162 struct target_aux_context *aux =
1163 (struct target_aux_context *)sf->uc.tuc_mcontext.__reserved;
1164
1165 /* set up the stack frame for unwinding */
1166 __put_user(env->xregs[29], &sf->fp);
1167 __put_user(env->xregs[30], &sf->lr);
1168
1169 for (i = 0; i < 31; i++) {
1170 __put_user(env->xregs[i], &sf->uc.tuc_mcontext.regs[i]);
1171 }
1172 __put_user(env->xregs[31], &sf->uc.tuc_mcontext.sp);
1173 __put_user(env->pc, &sf->uc.tuc_mcontext.pc);
1174 __put_user(env->pstate, &sf->uc.tuc_mcontext.pstate);
1175
1176 __put_user(/*current->thread.fault_address*/ 0,
1177 &sf->uc.tuc_mcontext.fault_address);
1178
1179 for (i = 0; i < TARGET_NSIG_WORDS; i++) {
1180 __put_user(set->sig[i], &sf->uc.tuc_sigmask.sig[i]);
1181 }
1182
1183 for (i = 0; i < 32; i++) {
1184 #ifdef TARGET_WORDS_BIGENDIAN
1185 __put_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2 + 1]);
1186 __put_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2]);
1187 #else
1188 __put_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2]);
1189 __put_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2 + 1]);
1190 #endif
1191 }
1192 __put_user(/*env->fpsr*/0, &aux->fpsimd.fpsr);
1193 __put_user(/*env->fpcr*/0, &aux->fpsimd.fpcr);
1194 __put_user(TARGET_FPSIMD_MAGIC, &aux->fpsimd.head.magic);
1195 __put_user(sizeof(struct target_fpsimd_context),
1196 &aux->fpsimd.head.size);
1197
1198 /* set the "end" magic */
1199 __put_user(0, &aux->end.magic);
1200 __put_user(0, &aux->end.size);
1201
1202 return 0;
1203 }
1204
1205 static int target_restore_sigframe(CPUARMState *env,
1206 struct target_rt_sigframe *sf)
1207 {
1208 sigset_t set;
1209 int i;
1210 struct target_aux_context *aux =
1211 (struct target_aux_context *)sf->uc.tuc_mcontext.__reserved;
1212 uint32_t magic, size;
1213
1214 target_to_host_sigset(&set, &sf->uc.tuc_sigmask);
1215 sigprocmask(SIG_SETMASK, &set, NULL);
1216
1217 for (i = 0; i < 31; i++) {
1218 __get_user(env->xregs[i], &sf->uc.tuc_mcontext.regs[i]);
1219 }
1220
1221 __get_user(env->xregs[31], &sf->uc.tuc_mcontext.sp);
1222 __get_user(env->pc, &sf->uc.tuc_mcontext.pc);
1223 __get_user(env->pstate, &sf->uc.tuc_mcontext.pstate);
1224
1225 __get_user(magic, &aux->fpsimd.head.magic);
1226 __get_user(size, &aux->fpsimd.head.size);
1227
1228 if (magic != TARGET_FPSIMD_MAGIC
1229 || size != sizeof(struct target_fpsimd_context)) {
1230 return 1;
1231 }
1232
1233 for (i = 0; i < 32 * 2; i++) {
1234 __get_user(env->vfp.regs[i], &aux->fpsimd.vregs[i]);
1235 }
1236
1237 return 0;
1238 }
1239
1240 static abi_ulong get_sigframe(struct target_sigaction *ka, CPUARMState *env)
1241 {
1242 abi_ulong sp;
1243
1244 sp = env->xregs[31];
1245
1246 /*
1247 * This is the X/Open sanctioned signal stack switching.
1248 */
1249 if ((ka->sa_flags & SA_ONSTACK) && !sas_ss_flags(sp)) {
1250 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1251 }
1252
1253 sp = (sp - sizeof(struct target_rt_sigframe)) & ~15;
1254
1255 return sp;
1256 }
1257
1258 static void target_setup_frame(int usig, struct target_sigaction *ka,
1259 target_siginfo_t *info, target_sigset_t *set,
1260 CPUARMState *env)
1261 {
1262 struct target_rt_sigframe *frame;
1263 abi_ulong frame_addr;
1264
1265 frame_addr = get_sigframe(ka, env);
1266 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
1267 goto give_sigsegv;
1268 }
1269
1270 __put_user(0, &frame->uc.tuc_flags);
1271 __put_user(0, &frame->uc.tuc_link);
1272
1273 __put_user(target_sigaltstack_used.ss_sp,
1274 &frame->uc.tuc_stack.ss_sp);
1275 __put_user(sas_ss_flags(env->xregs[31]),
1276 &frame->uc.tuc_stack.ss_flags);
1277 __put_user(target_sigaltstack_used.ss_size,
1278 &frame->uc.tuc_stack.ss_size);
1279 target_setup_sigframe(frame, env, set);
1280 /* mov x8,#__NR_rt_sigreturn; svc #0 */
1281 __put_user(0xd2801168, &frame->tramp[0]);
1282 __put_user(0xd4000001, &frame->tramp[1]);
1283 env->xregs[0] = usig;
1284 env->xregs[31] = frame_addr;
1285 env->xregs[29] = env->xregs[31] + offsetof(struct target_rt_sigframe, fp);
1286 env->pc = ka->_sa_handler;
1287 env->xregs[30] = env->xregs[31] +
1288 offsetof(struct target_rt_sigframe, tramp);
1289 if (info) {
1290 if (copy_siginfo_to_user(&frame->info, info)) {
1291 goto give_sigsegv;
1292 }
1293 env->xregs[1] = frame_addr + offsetof(struct target_rt_sigframe, info);
1294 env->xregs[2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
1295 }
1296
1297 unlock_user_struct(frame, frame_addr, 1);
1298 return;
1299
1300 give_sigsegv:
1301 unlock_user_struct(frame, frame_addr, 1);
1302 force_sig(TARGET_SIGSEGV);
1303 }
1304
1305 static void setup_rt_frame(int sig, struct target_sigaction *ka,
1306 target_siginfo_t *info, target_sigset_t *set,
1307 CPUARMState *env)
1308 {
1309 target_setup_frame(sig, ka, info, set, env);
1310 }
1311
1312 static void setup_frame(int sig, struct target_sigaction *ka,
1313 target_sigset_t *set, CPUARMState *env)
1314 {
1315 target_setup_frame(sig, ka, 0, set, env);
1316 }
1317
1318 long do_rt_sigreturn(CPUARMState *env)
1319 {
1320 struct target_rt_sigframe *frame;
1321 abi_ulong frame_addr = env->xregs[31];
1322
1323 if (frame_addr & 15) {
1324 goto badframe;
1325 }
1326
1327 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
1328 goto badframe;
1329 }
1330
1331 if (target_restore_sigframe(env, frame)) {
1332 goto badframe;
1333 }
1334
1335 if (do_sigaltstack(frame_addr +
1336 offsetof(struct target_rt_sigframe, uc.tuc_stack),
1337 0, get_sp_from_cpustate(env)) == -EFAULT) {
1338 goto badframe;
1339 }
1340
1341 unlock_user_struct(frame, frame_addr, 0);
1342 return env->xregs[0];
1343
1344 badframe:
1345 unlock_user_struct(frame, frame_addr, 0);
1346 force_sig(TARGET_SIGSEGV);
1347 return 0;
1348 }
1349
1350 long do_sigreturn(CPUARMState *env)
1351 {
1352 return do_rt_sigreturn(env);
1353 }
1354
1355 #elif defined(TARGET_ARM)
1356
1357 struct target_sigcontext {
1358 abi_ulong trap_no;
1359 abi_ulong error_code;
1360 abi_ulong oldmask;
1361 abi_ulong arm_r0;
1362 abi_ulong arm_r1;
1363 abi_ulong arm_r2;
1364 abi_ulong arm_r3;
1365 abi_ulong arm_r4;
1366 abi_ulong arm_r5;
1367 abi_ulong arm_r6;
1368 abi_ulong arm_r7;
1369 abi_ulong arm_r8;
1370 abi_ulong arm_r9;
1371 abi_ulong arm_r10;
1372 abi_ulong arm_fp;
1373 abi_ulong arm_ip;
1374 abi_ulong arm_sp;
1375 abi_ulong arm_lr;
1376 abi_ulong arm_pc;
1377 abi_ulong arm_cpsr;
1378 abi_ulong fault_address;
1379 };
1380
1381 struct target_ucontext_v1 {
1382 abi_ulong tuc_flags;
1383 abi_ulong tuc_link;
1384 target_stack_t tuc_stack;
1385 struct target_sigcontext tuc_mcontext;
1386 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1387 };
1388
1389 struct target_ucontext_v2 {
1390 abi_ulong tuc_flags;
1391 abi_ulong tuc_link;
1392 target_stack_t tuc_stack;
1393 struct target_sigcontext tuc_mcontext;
1394 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1395 char __unused[128 - sizeof(target_sigset_t)];
1396 abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
1397 };
1398
1399 struct target_user_vfp {
1400 uint64_t fpregs[32];
1401 abi_ulong fpscr;
1402 };
1403
1404 struct target_user_vfp_exc {
1405 abi_ulong fpexc;
1406 abi_ulong fpinst;
1407 abi_ulong fpinst2;
1408 };
1409
1410 struct target_vfp_sigframe {
1411 abi_ulong magic;
1412 abi_ulong size;
1413 struct target_user_vfp ufp;
1414 struct target_user_vfp_exc ufp_exc;
1415 } __attribute__((__aligned__(8)));
1416
1417 struct target_iwmmxt_sigframe {
1418 abi_ulong magic;
1419 abi_ulong size;
1420 uint64_t regs[16];
1421 /* Note that not all the coprocessor control registers are stored here */
1422 uint32_t wcssf;
1423 uint32_t wcasf;
1424 uint32_t wcgr0;
1425 uint32_t wcgr1;
1426 uint32_t wcgr2;
1427 uint32_t wcgr3;
1428 } __attribute__((__aligned__(8)));
1429
1430 #define TARGET_VFP_MAGIC 0x56465001
1431 #define TARGET_IWMMXT_MAGIC 0x12ef842a
1432
1433 struct sigframe_v1
1434 {
1435 struct target_sigcontext sc;
1436 abi_ulong extramask[TARGET_NSIG_WORDS-1];
1437 abi_ulong retcode;
1438 };
1439
1440 struct sigframe_v2
1441 {
1442 struct target_ucontext_v2 uc;
1443 abi_ulong retcode;
1444 };
1445
1446 struct rt_sigframe_v1
1447 {
1448 abi_ulong pinfo;
1449 abi_ulong puc;
1450 struct target_siginfo info;
1451 struct target_ucontext_v1 uc;
1452 abi_ulong retcode;
1453 };
1454
1455 struct rt_sigframe_v2
1456 {
1457 struct target_siginfo info;
1458 struct target_ucontext_v2 uc;
1459 abi_ulong retcode;
1460 };
1461
1462 #define TARGET_CONFIG_CPU_32 1
1463
1464 /*
1465 * For ARM syscalls, we encode the syscall number into the instruction.
1466 */
1467 #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
1468 #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
1469
1470 /*
1471 * For Thumb syscalls, we pass the syscall number via r7. We therefore
1472 * need two 16-bit instructions.
1473 */
1474 #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
1475 #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
1476
1477 static const abi_ulong retcodes[4] = {
1478 SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
1479 SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
1480 };
1481
1482
1483 #define __get_user_error(x,p,e) __get_user(x, p)
1484
1485 static inline int valid_user_regs(CPUARMState *regs)
1486 {
1487 return 1;
1488 }
1489
1490 static void
1491 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1492 CPUARMState *env, abi_ulong mask)
1493 {
1494 __put_user(env->regs[0], &sc->arm_r0);
1495 __put_user(env->regs[1], &sc->arm_r1);
1496 __put_user(env->regs[2], &sc->arm_r2);
1497 __put_user(env->regs[3], &sc->arm_r3);
1498 __put_user(env->regs[4], &sc->arm_r4);
1499 __put_user(env->regs[5], &sc->arm_r5);
1500 __put_user(env->regs[6], &sc->arm_r6);
1501 __put_user(env->regs[7], &sc->arm_r7);
1502 __put_user(env->regs[8], &sc->arm_r8);
1503 __put_user(env->regs[9], &sc->arm_r9);
1504 __put_user(env->regs[10], &sc->arm_r10);
1505 __put_user(env->regs[11], &sc->arm_fp);
1506 __put_user(env->regs[12], &sc->arm_ip);
1507 __put_user(env->regs[13], &sc->arm_sp);
1508 __put_user(env->regs[14], &sc->arm_lr);
1509 __put_user(env->regs[15], &sc->arm_pc);
1510 #ifdef TARGET_CONFIG_CPU_32
1511 __put_user(cpsr_read(env), &sc->arm_cpsr);
1512 #endif
1513
1514 __put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
1515 __put_user(/* current->thread.error_code */ 0, &sc->error_code);
1516 __put_user(/* current->thread.address */ 0, &sc->fault_address);
1517 __put_user(mask, &sc->oldmask);
1518 }
1519
1520 static inline abi_ulong
1521 get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize)
1522 {
1523 unsigned long sp = regs->regs[13];
1524
1525 /*
1526 * This is the X/Open sanctioned signal stack switching.
1527 */
1528 if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
1529 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1530 /*
1531 * ATPCS B01 mandates 8-byte alignment
1532 */
1533 return (sp - framesize) & ~7;
1534 }
1535
1536 static int
1537 setup_return(CPUARMState *env, struct target_sigaction *ka,
1538 abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
1539 {
1540 abi_ulong handler = ka->_sa_handler;
1541 abi_ulong retcode;
1542 int thumb = handler & 1;
1543 uint32_t cpsr = cpsr_read(env);
1544
1545 cpsr &= ~CPSR_IT;
1546 if (thumb) {
1547 cpsr |= CPSR_T;
1548 } else {
1549 cpsr &= ~CPSR_T;
1550 }
1551
1552 if (ka->sa_flags & TARGET_SA_RESTORER) {
1553 retcode = ka->sa_restorer;
1554 } else {
1555 unsigned int idx = thumb;
1556
1557 if (ka->sa_flags & TARGET_SA_SIGINFO)
1558 idx += 2;
1559
1560 if (__put_user(retcodes[idx], rc))
1561 return 1;
1562
1563 retcode = rc_addr + thumb;
1564 }
1565
1566 env->regs[0] = usig;
1567 env->regs[13] = frame_addr;
1568 env->regs[14] = retcode;
1569 env->regs[15] = handler & (thumb ? ~1 : ~3);
1570 cpsr_write(env, cpsr, 0xffffffff);
1571
1572 return 0;
1573 }
1574
1575 static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env)
1576 {
1577 int i;
1578 struct target_vfp_sigframe *vfpframe;
1579 vfpframe = (struct target_vfp_sigframe *)regspace;
1580 __put_user(TARGET_VFP_MAGIC, &vfpframe->magic);
1581 __put_user(sizeof(*vfpframe), &vfpframe->size);
1582 for (i = 0; i < 32; i++) {
1583 __put_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]);
1584 }
1585 __put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr);
1586 __put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc);
1587 __put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
1588 __put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
1589 return (abi_ulong*)(vfpframe+1);
1590 }
1591
1592 static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace,
1593 CPUARMState *env)
1594 {
1595 int i;
1596 struct target_iwmmxt_sigframe *iwmmxtframe;
1597 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
1598 __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic);
1599 __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size);
1600 for (i = 0; i < 16; i++) {
1601 __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
1602 }
1603 __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
1604 __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
1605 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
1606 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
1607 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
1608 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
1609 return (abi_ulong*)(iwmmxtframe+1);
1610 }
1611
1612 static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
1613 target_sigset_t *set, CPUARMState *env)
1614 {
1615 struct target_sigaltstack stack;
1616 int i;
1617 abi_ulong *regspace;
1618
1619 /* Clear all the bits of the ucontext we don't use. */
1620 memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
1621
1622 memset(&stack, 0, sizeof(stack));
1623 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1624 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1625 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1626 memcpy(&uc->tuc_stack, &stack, sizeof(stack));
1627
1628 setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
1629 /* Save coprocessor signal frame. */
1630 regspace = uc->tuc_regspace;
1631 if (arm_feature(env, ARM_FEATURE_VFP)) {
1632 regspace = setup_sigframe_v2_vfp(regspace, env);
1633 }
1634 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
1635 regspace = setup_sigframe_v2_iwmmxt(regspace, env);
1636 }
1637
1638 /* Write terminating magic word */
1639 __put_user(0, regspace);
1640
1641 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1642 __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
1643 }
1644 }
1645
1646 /* compare linux/arch/arm/kernel/signal.c:setup_frame() */
1647 static void setup_frame_v1(int usig, struct target_sigaction *ka,
1648 target_sigset_t *set, CPUARMState *regs)
1649 {
1650 struct sigframe_v1 *frame;
1651 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1652 int i;
1653
1654 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1655 return;
1656
1657 setup_sigcontext(&frame->sc, regs, set->sig[0]);
1658
1659 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1660 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
1661 goto end;
1662 }
1663
1664 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1665 frame_addr + offsetof(struct sigframe_v1, retcode));
1666
1667 end:
1668 unlock_user_struct(frame, frame_addr, 1);
1669 }
1670
1671 static void setup_frame_v2(int usig, struct target_sigaction *ka,
1672 target_sigset_t *set, CPUARMState *regs)
1673 {
1674 struct sigframe_v2 *frame;
1675 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1676
1677 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1678 return;
1679
1680 setup_sigframe_v2(&frame->uc, set, regs);
1681
1682 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1683 frame_addr + offsetof(struct sigframe_v2, retcode));
1684
1685 unlock_user_struct(frame, frame_addr, 1);
1686 }
1687
1688 static void setup_frame(int usig, struct target_sigaction *ka,
1689 target_sigset_t *set, CPUARMState *regs)
1690 {
1691 if (get_osversion() >= 0x020612) {
1692 setup_frame_v2(usig, ka, set, regs);
1693 } else {
1694 setup_frame_v1(usig, ka, set, regs);
1695 }
1696 }
1697
1698 /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
1699 static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
1700 target_siginfo_t *info,
1701 target_sigset_t *set, CPUARMState *env)
1702 {
1703 struct rt_sigframe_v1 *frame;
1704 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1705 struct target_sigaltstack stack;
1706 int i;
1707 abi_ulong info_addr, uc_addr;
1708
1709 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1710 return /* 1 */;
1711
1712 info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
1713 __put_user(info_addr, &frame->pinfo);
1714 uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
1715 __put_user(uc_addr, &frame->puc);
1716 copy_siginfo_to_user(&frame->info, info);
1717
1718 /* Clear all the bits of the ucontext we don't use. */
1719 memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
1720
1721 memset(&stack, 0, sizeof(stack));
1722 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1723 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1724 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1725 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
1726
1727 setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
1728 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1729 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
1730 goto end;
1731 }
1732
1733 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1734 frame_addr + offsetof(struct rt_sigframe_v1, retcode));
1735
1736 env->regs[1] = info_addr;
1737 env->regs[2] = uc_addr;
1738
1739 end:
1740 unlock_user_struct(frame, frame_addr, 1);
1741 }
1742
1743 static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
1744 target_siginfo_t *info,
1745 target_sigset_t *set, CPUARMState *env)
1746 {
1747 struct rt_sigframe_v2 *frame;
1748 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1749 abi_ulong info_addr, uc_addr;
1750
1751 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1752 return /* 1 */;
1753
1754 info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
1755 uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
1756 copy_siginfo_to_user(&frame->info, info);
1757
1758 setup_sigframe_v2(&frame->uc, set, env);
1759
1760 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1761 frame_addr + offsetof(struct rt_sigframe_v2, retcode));
1762
1763 env->regs[1] = info_addr;
1764 env->regs[2] = uc_addr;
1765
1766 unlock_user_struct(frame, frame_addr, 1);
1767 }
1768
1769 static void setup_rt_frame(int usig, struct target_sigaction *ka,
1770 target_siginfo_t *info,
1771 target_sigset_t *set, CPUARMState *env)
1772 {
1773 if (get_osversion() >= 0x020612) {
1774 setup_rt_frame_v2(usig, ka, info, set, env);
1775 } else {
1776 setup_rt_frame_v1(usig, ka, info, set, env);
1777 }
1778 }
1779
1780 static int
1781 restore_sigcontext(CPUARMState *env, struct target_sigcontext *sc)
1782 {
1783 int err = 0;
1784 uint32_t cpsr;
1785
1786 __get_user_error(env->regs[0], &sc->arm_r0, err);
1787 __get_user_error(env->regs[1], &sc->arm_r1, err);
1788 __get_user_error(env->regs[2], &sc->arm_r2, err);
1789 __get_user_error(env->regs[3], &sc->arm_r3, err);
1790 __get_user_error(env->regs[4], &sc->arm_r4, err);
1791 __get_user_error(env->regs[5], &sc->arm_r5, err);
1792 __get_user_error(env->regs[6], &sc->arm_r6, err);
1793 __get_user_error(env->regs[7], &sc->arm_r7, err);
1794 __get_user_error(env->regs[8], &sc->arm_r8, err);
1795 __get_user_error(env->regs[9], &sc->arm_r9, err);
1796 __get_user_error(env->regs[10], &sc->arm_r10, err);
1797 __get_user_error(env->regs[11], &sc->arm_fp, err);
1798 __get_user_error(env->regs[12], &sc->arm_ip, err);
1799 __get_user_error(env->regs[13], &sc->arm_sp, err);
1800 __get_user_error(env->regs[14], &sc->arm_lr, err);
1801 __get_user_error(env->regs[15], &sc->arm_pc, err);
1802 #ifdef TARGET_CONFIG_CPU_32
1803 __get_user_error(cpsr, &sc->arm_cpsr, err);
1804 cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC);
1805 #endif
1806
1807 err |= !valid_user_regs(env);
1808
1809 return err;
1810 }
1811
1812 static long do_sigreturn_v1(CPUARMState *env)
1813 {
1814 abi_ulong frame_addr;
1815 struct sigframe_v1 *frame = NULL;
1816 target_sigset_t set;
1817 sigset_t host_set;
1818 int i;
1819
1820 /*
1821 * Since we stacked the signal on a 64-bit boundary,
1822 * then 'sp' should be word aligned here. If it's
1823 * not, then the user is trying to mess with us.
1824 */
1825 frame_addr = env->regs[13];
1826 if (frame_addr & 7) {
1827 goto badframe;
1828 }
1829
1830 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1831 goto badframe;
1832
1833 if (__get_user(set.sig[0], &frame->sc.oldmask))
1834 goto badframe;
1835 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1836 if (__get_user(set.sig[i], &frame->extramask[i - 1]))
1837 goto badframe;
1838 }
1839
1840 target_to_host_sigset_internal(&host_set, &set);
1841 sigprocmask(SIG_SETMASK, &host_set, NULL);
1842
1843 if (restore_sigcontext(env, &frame->sc))
1844 goto badframe;
1845
1846 #if 0
1847 /* Send SIGTRAP if we're single-stepping */
1848 if (ptrace_cancel_bpt(current))
1849 send_sig(SIGTRAP, current, 1);
1850 #endif
1851 unlock_user_struct(frame, frame_addr, 0);
1852 return env->regs[0];
1853
1854 badframe:
1855 unlock_user_struct(frame, frame_addr, 0);
1856 force_sig(TARGET_SIGSEGV /* , current */);
1857 return 0;
1858 }
1859
1860 static abi_ulong *restore_sigframe_v2_vfp(CPUARMState *env, abi_ulong *regspace)
1861 {
1862 int i;
1863 abi_ulong magic, sz;
1864 uint32_t fpscr, fpexc;
1865 struct target_vfp_sigframe *vfpframe;
1866 vfpframe = (struct target_vfp_sigframe *)regspace;
1867
1868 __get_user(magic, &vfpframe->magic);
1869 __get_user(sz, &vfpframe->size);
1870 if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) {
1871 return 0;
1872 }
1873 for (i = 0; i < 32; i++) {
1874 __get_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]);
1875 }
1876 __get_user(fpscr, &vfpframe->ufp.fpscr);
1877 vfp_set_fpscr(env, fpscr);
1878 __get_user(fpexc, &vfpframe->ufp_exc.fpexc);
1879 /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid
1880 * and the exception flag is cleared
1881 */
1882 fpexc |= (1 << 30);
1883 fpexc &= ~((1 << 31) | (1 << 28));
1884 env->vfp.xregs[ARM_VFP_FPEXC] = fpexc;
1885 __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
1886 __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
1887 return (abi_ulong*)(vfpframe + 1);
1888 }
1889
1890 static abi_ulong *restore_sigframe_v2_iwmmxt(CPUARMState *env,
1891 abi_ulong *regspace)
1892 {
1893 int i;
1894 abi_ulong magic, sz;
1895 struct target_iwmmxt_sigframe *iwmmxtframe;
1896 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
1897
1898 __get_user(magic, &iwmmxtframe->magic);
1899 __get_user(sz, &iwmmxtframe->size);
1900 if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) {
1901 return 0;
1902 }
1903 for (i = 0; i < 16; i++) {
1904 __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
1905 }
1906 __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
1907 __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
1908 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
1909 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
1910 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
1911 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
1912 return (abi_ulong*)(iwmmxtframe + 1);
1913 }
1914
1915 static int do_sigframe_return_v2(CPUARMState *env, target_ulong frame_addr,
1916 struct target_ucontext_v2 *uc)
1917 {
1918 sigset_t host_set;
1919 abi_ulong *regspace;
1920
1921 target_to_host_sigset(&host_set, &uc->tuc_sigmask);
1922 sigprocmask(SIG_SETMASK, &host_set, NULL);
1923
1924 if (restore_sigcontext(env, &uc->tuc_mcontext))
1925 return 1;
1926
1927 /* Restore coprocessor signal frame */
1928 regspace = uc->tuc_regspace;
1929 if (arm_feature(env, ARM_FEATURE_VFP)) {
1930 regspace = restore_sigframe_v2_vfp(env, regspace);
1931 if (!regspace) {
1932 return 1;
1933 }
1934 }
1935 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
1936 regspace = restore_sigframe_v2_iwmmxt(env, regspace);
1937 if (!regspace) {
1938 return 1;
1939 }
1940 }
1941
1942 if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1943 return 1;
1944
1945 #if 0
1946 /* Send SIGTRAP if we're single-stepping */
1947 if (ptrace_cancel_bpt(current))
1948 send_sig(SIGTRAP, current, 1);
1949 #endif
1950
1951 return 0;
1952 }
1953
1954 static long do_sigreturn_v2(CPUARMState *env)
1955 {
1956 abi_ulong frame_addr;
1957 struct sigframe_v2 *frame = NULL;
1958
1959 /*
1960 * Since we stacked the signal on a 64-bit boundary,
1961 * then 'sp' should be word aligned here. If it's
1962 * not, then the user is trying to mess with us.
1963 */
1964 frame_addr = env->regs[13];
1965 if (frame_addr & 7) {
1966 goto badframe;
1967 }
1968
1969 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1970 goto badframe;
1971
1972 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1973 goto badframe;
1974
1975 unlock_user_struct(frame, frame_addr, 0);
1976 return env->regs[0];
1977
1978 badframe:
1979 unlock_user_struct(frame, frame_addr, 0);
1980 force_sig(TARGET_SIGSEGV /* , current */);
1981 return 0;
1982 }
1983
1984 long do_sigreturn(CPUARMState *env)
1985 {
1986 if (get_osversion() >= 0x020612) {
1987 return do_sigreturn_v2(env);
1988 } else {
1989 return do_sigreturn_v1(env);
1990 }
1991 }
1992
1993 static long do_rt_sigreturn_v1(CPUARMState *env)
1994 {
1995 abi_ulong frame_addr;
1996 struct rt_sigframe_v1 *frame = NULL;
1997 sigset_t host_set;
1998
1999 /*
2000 * Since we stacked the signal on a 64-bit boundary,
2001 * then 'sp' should be word aligned here. If it's
2002 * not, then the user is trying to mess with us.
2003 */
2004 frame_addr = env->regs[13];
2005 if (frame_addr & 7) {
2006 goto badframe;
2007 }
2008
2009 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2010 goto badframe;
2011
2012 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
2013 sigprocmask(SIG_SETMASK, &host_set, NULL);
2014
2015 if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
2016 goto badframe;
2017
2018 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
2019 goto badframe;
2020
2021 #if 0
2022 /* Send SIGTRAP if we're single-stepping */
2023 if (ptrace_cancel_bpt(current))
2024 send_sig(SIGTRAP, current, 1);
2025 #endif
2026 unlock_user_struct(frame, frame_addr, 0);
2027 return env->regs[0];
2028
2029 badframe:
2030 unlock_user_struct(frame, frame_addr, 0);
2031 force_sig(TARGET_SIGSEGV /* , current */);
2032 return 0;
2033 }
2034
2035 static long do_rt_sigreturn_v2(CPUARMState *env)
2036 {
2037 abi_ulong frame_addr;
2038 struct rt_sigframe_v2 *frame = NULL;
2039
2040 /*
2041 * Since we stacked the signal on a 64-bit boundary,
2042 * then 'sp' should be word aligned here. If it's
2043 * not, then the user is trying to mess with us.
2044 */
2045 frame_addr = env->regs[13];
2046 if (frame_addr & 7) {
2047 goto badframe;
2048 }
2049
2050 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2051 goto badframe;
2052
2053 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
2054 goto badframe;
2055
2056 unlock_user_struct(frame, frame_addr, 0);
2057 return env->regs[0];
2058
2059 badframe:
2060 unlock_user_struct(frame, frame_addr, 0);
2061 force_sig(TARGET_SIGSEGV /* , current */);
2062 return 0;
2063 }
2064
2065 long do_rt_sigreturn(CPUARMState *env)
2066 {
2067 if (get_osversion() >= 0x020612) {
2068 return do_rt_sigreturn_v2(env);
2069 } else {
2070 return do_rt_sigreturn_v1(env);
2071 }
2072 }
2073
2074 #elif defined(TARGET_SPARC)
2075
2076 #define __SUNOS_MAXWIN 31
2077
2078 /* This is what SunOS does, so shall I. */
2079 struct target_sigcontext {
2080 abi_ulong sigc_onstack; /* state to restore */
2081
2082 abi_ulong sigc_mask; /* sigmask to restore */
2083 abi_ulong sigc_sp; /* stack pointer */
2084 abi_ulong sigc_pc; /* program counter */
2085 abi_ulong sigc_npc; /* next program counter */
2086 abi_ulong sigc_psr; /* for condition codes etc */
2087 abi_ulong sigc_g1; /* User uses these two registers */
2088 abi_ulong sigc_o0; /* within the trampoline code. */
2089
2090 /* Now comes information regarding the users window set
2091 * at the time of the signal.
2092 */
2093 abi_ulong sigc_oswins; /* outstanding windows */
2094
2095 /* stack ptrs for each regwin buf */
2096 char *sigc_spbuf[__SUNOS_MAXWIN];
2097
2098 /* Windows to restore after signal */
2099 struct {
2100 abi_ulong locals[8];
2101 abi_ulong ins[8];
2102 } sigc_wbuf[__SUNOS_MAXWIN];
2103 };
2104 /* A Sparc stack frame */
2105 struct sparc_stackf {
2106 abi_ulong locals[8];
2107 abi_ulong ins[8];
2108 /* It's simpler to treat fp and callers_pc as elements of ins[]
2109 * since we never need to access them ourselves.
2110 */
2111 char *structptr;
2112 abi_ulong xargs[6];
2113 abi_ulong xxargs[1];
2114 };
2115
2116 typedef struct {
2117 struct {
2118 abi_ulong psr;
2119 abi_ulong pc;
2120 abi_ulong npc;
2121 abi_ulong y;
2122 abi_ulong u_regs[16]; /* globals and ins */
2123 } si_regs;
2124 int si_mask;
2125 } __siginfo_t;
2126
2127 typedef struct {
2128 abi_ulong si_float_regs[32];
2129 unsigned long si_fsr;
2130 unsigned long si_fpqdepth;
2131 struct {
2132 unsigned long *insn_addr;
2133 unsigned long insn;
2134 } si_fpqueue [16];
2135 } qemu_siginfo_fpu_t;
2136
2137
2138 struct target_signal_frame {
2139 struct sparc_stackf ss;
2140 __siginfo_t info;
2141 abi_ulong fpu_save;
2142 abi_ulong insns[2] __attribute__ ((aligned (8)));
2143 abi_ulong extramask[TARGET_NSIG_WORDS - 1];
2144 abi_ulong extra_size; /* Should be 0 */
2145 qemu_siginfo_fpu_t fpu_state;
2146 };
2147 struct target_rt_signal_frame {
2148 struct sparc_stackf ss;
2149 siginfo_t info;
2150 abi_ulong regs[20];
2151 sigset_t mask;
2152 abi_ulong fpu_save;
2153 unsigned int insns[2];
2154 stack_t stack;
2155 unsigned int extra_size; /* Should be 0 */
2156 qemu_siginfo_fpu_t fpu_state;
2157 };
2158
2159 #define UREG_O0 16
2160 #define UREG_O6 22
2161 #define UREG_I0 0
2162 #define UREG_I1 1
2163 #define UREG_I2 2
2164 #define UREG_I3 3
2165 #define UREG_I4 4
2166 #define UREG_I5 5
2167 #define UREG_I6 6
2168 #define UREG_I7 7
2169 #define UREG_L0 8
2170 #define UREG_FP UREG_I6
2171 #define UREG_SP UREG_O6
2172
2173 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
2174 CPUSPARCState *env,
2175 unsigned long framesize)
2176 {
2177 abi_ulong sp;
2178
2179 sp = env->regwptr[UREG_FP];
2180
2181 /* This is the X/Open sanctioned signal stack switching. */
2182 if (sa->sa_flags & TARGET_SA_ONSTACK) {
2183 if (!on_sig_stack(sp)
2184 && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
2185 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2186 }
2187 return sp - framesize;
2188 }
2189
2190 static int
2191 setup___siginfo(__siginfo_t *si, CPUSPARCState *env, abi_ulong mask)
2192 {
2193 int err = 0, i;
2194
2195 err |= __put_user(env->psr, &si->si_regs.psr);
2196 err |= __put_user(env->pc, &si->si_regs.pc);
2197 err |= __put_user(env->npc, &si->si_regs.npc);
2198 err |= __put_user(env->y, &si->si_regs.y);
2199 for (i=0; i < 8; i++) {
2200 err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
2201 }
2202 for (i=0; i < 8; i++) {
2203 err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
2204 }
2205 err |= __put_user(mask, &si->si_mask);
2206 return err;
2207 }
2208
2209 #if 0
2210 static int
2211 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
2212 CPUSPARCState *env, unsigned long mask)
2213 {
2214 int err = 0;
2215
2216 err |= __put_user(mask, &sc->sigc_mask);
2217 err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
2218 err |= __put_user(env->pc, &sc->sigc_pc);
2219 err |= __put_user(env->npc, &sc->sigc_npc);
2220 err |= __put_user(env->psr, &sc->sigc_psr);
2221 err |= __put_user(env->gregs[1], &sc->sigc_g1);
2222 err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
2223
2224 return err;
2225 }
2226 #endif
2227 #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
2228
2229 static void setup_frame(int sig, struct target_sigaction *ka,
2230 target_sigset_t *set, CPUSPARCState *env)
2231 {
2232 abi_ulong sf_addr;
2233 struct target_signal_frame *sf;
2234 int sigframe_size, err, i;
2235
2236 /* 1. Make sure everything is clean */
2237 //synchronize_user_stack();
2238
2239 sigframe_size = NF_ALIGNEDSZ;
2240 sf_addr = get_sigframe(ka, env, sigframe_size);
2241
2242 sf = lock_user(VERIFY_WRITE, sf_addr,
2243 sizeof(struct target_signal_frame), 0);
2244 if (!sf)
2245 goto sigsegv;
2246
2247 //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
2248 #if 0
2249 if (invalid_frame_pointer(sf, sigframe_size))
2250 goto sigill_and_return;
2251 #endif
2252 /* 2. Save the current process state */
2253 err = setup___siginfo(&sf->info, env, set->sig[0]);
2254 err |= __put_user(0, &sf->extra_size);
2255
2256 //err |= save_fpu_state(regs, &sf->fpu_state);
2257 //err |= __put_user(&sf->fpu_state, &sf->fpu_save);
2258
2259 err |= __put_user(set->sig[0], &sf->info.si_mask);
2260 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
2261 err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
2262 }
2263
2264 for (i = 0; i < 8; i++) {
2265 err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
2266 }
2267 for (i = 0; i < 8; i++) {
2268 err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
2269 }
2270 if (err)
2271 goto sigsegv;
2272
2273 /* 3. signal handler back-trampoline and parameters */
2274 env->regwptr[UREG_FP] = sf_addr;
2275 env->regwptr[UREG_I0] = sig;
2276 env->regwptr[UREG_I1] = sf_addr +
2277 offsetof(struct target_signal_frame, info);
2278 env->regwptr[UREG_I2] = sf_addr +
2279 offsetof(struct target_signal_frame, info);
2280
2281 /* 4. signal handler */
2282 env->pc = ka->_sa_handler;
2283 env->npc = (env->pc + 4);
2284 /* 5. return to kernel instructions */
2285 if (ka->sa_restorer)
2286 env->regwptr[UREG_I7] = ka->sa_restorer;
2287 else {
2288 uint32_t val32;
2289
2290 env->regwptr[UREG_I7] = sf_addr +
2291 offsetof(struct target_signal_frame, insns) - 2 * 4;
2292
2293 /* mov __NR_sigreturn, %g1 */
2294 val32 = 0x821020d8;
2295 err |= __put_user(val32, &sf->insns[0]);
2296
2297 /* t 0x10 */
2298 val32 = 0x91d02010;
2299 err |= __put_user(val32, &sf->insns[1]);
2300 if (err)
2301 goto sigsegv;
2302
2303 /* Flush instruction space. */
2304 //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
2305 // tb_flush(env);
2306 }
2307 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
2308 return;
2309 #if 0
2310 sigill_and_return:
2311 force_sig(TARGET_SIGILL);
2312 #endif
2313 sigsegv:
2314 //fprintf(stderr, "force_sig\n");
2315 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
2316 force_sig(TARGET_SIGSEGV);
2317 }
2318 static inline int
2319 restore_fpu_state(CPUSPARCState *env, qemu_siginfo_fpu_t *fpu)
2320 {
2321 int err;
2322 #if 0
2323 #ifdef CONFIG_SMP
2324 if (current->flags & PF_USEDFPU)
2325 regs->psr &= ~PSR_EF;
2326 #else
2327 if (current == last_task_used_math) {
2328 last_task_used_math = 0;
2329 regs->psr &= ~PSR_EF;
2330 }
2331 #endif
2332 current->used_math = 1;
2333 current->flags &= ~PF_USEDFPU;
2334 #endif
2335 #if 0
2336 if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
2337 return -EFAULT;
2338 #endif
2339
2340 /* XXX: incorrect */
2341 err = copy_from_user(&env->fpr[0], fpu->si_float_regs[0],
2342 (sizeof(abi_ulong) * 32));
2343 err |= __get_user(env->fsr, &fpu->si_fsr);
2344 #if 0
2345 err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
2346 if (current->thread.fpqdepth != 0)
2347 err |= __copy_from_user(&current->thread.fpqueue[0],
2348 &fpu->si_fpqueue[0],
2349 ((sizeof(unsigned long) +
2350 (sizeof(unsigned long *)))*16));
2351 #endif
2352 return err;
2353 }
2354
2355
2356 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2357 target_siginfo_t *info,
2358 target_sigset_t *set, CPUSPARCState *env)
2359 {
2360 fprintf(stderr, "setup_rt_frame: not implemented\n");
2361 }
2362
2363 long do_sigreturn(CPUSPARCState *env)
2364 {
2365 abi_ulong sf_addr;
2366 struct target_signal_frame *sf;
2367 uint32_t up_psr, pc, npc;
2368 target_sigset_t set;
2369 sigset_t host_set;
2370 int err, i;
2371
2372 sf_addr = env->regwptr[UREG_FP];
2373 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1))
2374 goto segv_and_exit;
2375 #if 0
2376 fprintf(stderr, "sigreturn\n");
2377 fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
2378 #endif
2379 //cpu_dump_state(env, stderr, fprintf, 0);
2380
2381 /* 1. Make sure we are not getting garbage from the user */
2382
2383 if (sf_addr & 3)
2384 goto segv_and_exit;
2385
2386 err = __get_user(pc, &sf->info.si_regs.pc);
2387 err |= __get_user(npc, &sf->info.si_regs.npc);
2388
2389 if ((pc | npc) & 3)
2390 goto segv_and_exit;
2391
2392 /* 2. Restore the state */
2393 err |= __get_user(up_psr, &sf->info.si_regs.psr);
2394
2395 /* User can only change condition codes and FPU enabling in %psr. */
2396 env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
2397 | (env->psr & ~(PSR_ICC /* | PSR_EF */));
2398
2399 env->pc = pc;
2400 env->npc = npc;
2401 err |= __get_user(env->y, &sf->info.si_regs.y);
2402 for (i=0; i < 8; i++) {
2403 err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
2404 }
2405 for (i=0; i < 8; i++) {
2406 err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
2407 }
2408
2409 /* FIXME: implement FPU save/restore:
2410 * __get_user(fpu_save, &sf->fpu_save);
2411 * if (fpu_save)
2412 * err |= restore_fpu_state(env, fpu_save);
2413 */
2414
2415 /* This is pretty much atomic, no amount locking would prevent
2416 * the races which exist anyways.
2417 */
2418 err |= __get_user(set.sig[0], &sf->info.si_mask);
2419 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2420 err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
2421 }
2422
2423 target_to_host_sigset_internal(&host_set, &set);
2424 sigprocmask(SIG_SETMASK, &host_set, NULL);
2425
2426 if (err)
2427 goto segv_and_exit;
2428 unlock_user_struct(sf, sf_addr, 0);
2429 return env->regwptr[0];
2430
2431 segv_and_exit:
2432 unlock_user_struct(sf, sf_addr, 0);
2433 force_sig(TARGET_SIGSEGV);
2434 }
2435
2436 long do_rt_sigreturn(CPUSPARCState *env)
2437 {
2438 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2439 return -TARGET_ENOSYS;
2440 }
2441
2442 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
2443 #define MC_TSTATE 0
2444 #define MC_PC 1
2445 #define MC_NPC 2
2446 #define MC_Y 3
2447 #define MC_G1 4
2448 #define MC_G2 5
2449 #define MC_G3 6
2450 #define MC_G4 7
2451 #define MC_G5 8
2452 #define MC_G6 9
2453 #define MC_G7 10
2454 #define MC_O0 11
2455 #define MC_O1 12
2456 #define MC_O2 13
2457 #define MC_O3 14
2458 #define MC_O4 15
2459 #define MC_O5 16
2460 #define MC_O6 17
2461 #define MC_O7 18
2462 #define MC_NGREG 19
2463
2464 typedef abi_ulong target_mc_greg_t;
2465 typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
2466
2467 struct target_mc_fq {
2468 abi_ulong *mcfq_addr;
2469 uint32_t mcfq_insn;
2470 };
2471
2472 struct target_mc_fpu {
2473 union {
2474 uint32_t sregs[32];
2475 uint64_t dregs[32];
2476 //uint128_t qregs[16];
2477 } mcfpu_fregs;
2478 abi_ulong mcfpu_fsr;
2479 abi_ulong mcfpu_fprs;
2480 abi_ulong mcfpu_gsr;
2481 struct target_mc_fq *mcfpu_fq;
2482 unsigned char mcfpu_qcnt;
2483 unsigned char mcfpu_qentsz;
2484 unsigned char mcfpu_enab;
2485 };
2486 typedef struct target_mc_fpu target_mc_fpu_t;
2487
2488 typedef struct {
2489 target_mc_gregset_t mc_gregs;
2490 target_mc_greg_t mc_fp;
2491 target_mc_greg_t mc_i7;
2492 target_mc_fpu_t mc_fpregs;
2493 } target_mcontext_t;
2494
2495 struct target_ucontext {
2496 struct target_ucontext *tuc_link;
2497 abi_ulong tuc_flags;
2498 target_sigset_t tuc_sigmask;
2499 target_mcontext_t tuc_mcontext;
2500 };
2501
2502 /* A V9 register window */
2503 struct target_reg_window {
2504 abi_ulong locals[8];
2505 abi_ulong ins[8];
2506 };
2507
2508 #define TARGET_STACK_BIAS 2047
2509
2510 /* {set, get}context() needed for 64-bit SparcLinux userland. */
2511 void sparc64_set_context(CPUSPARCState *env)
2512 {
2513 abi_ulong ucp_addr;
2514 struct target_ucontext *ucp;
2515 target_mc_gregset_t *grp;
2516 abi_ulong pc, npc, tstate;
2517 abi_ulong fp, i7, w_addr;
2518 int err;
2519 unsigned int i;
2520
2521 ucp_addr = env->regwptr[UREG_I0];
2522 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1))
2523 goto do_sigsegv;
2524 grp = &ucp->tuc_mcontext.mc_gregs;
2525 err = __get_user(pc, &((*grp)[MC_PC]));
2526 err |= __get_user(npc, &((*grp)[MC_NPC]));
2527 if (err || ((pc | npc) & 3))
2528 goto do_sigsegv;
2529 if (env->regwptr[UREG_I1]) {
2530 target_sigset_t target_set;
2531 sigset_t set;
2532
2533 if (TARGET_NSIG_WORDS == 1) {
2534 if (__get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0]))
2535 goto do_sigsegv;
2536 } else {
2537 abi_ulong *src, *dst;
2538 src = ucp->tuc_sigmask.sig;
2539 dst = target_set.sig;
2540 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2541 i++, dst++, src++)
2542 err |= __get_user(*dst, src);
2543 if (err)
2544 goto do_sigsegv;
2545 }
2546 target_to_host_sigset_internal(&set, &target_set);
2547 sigprocmask(SIG_SETMASK, &set, NULL);
2548 }
2549 env->pc = pc;
2550 env->npc = npc;
2551 err |= __get_user(env->y, &((*grp)[MC_Y]));
2552 err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
2553 env->asi = (tstate >> 24) & 0xff;
2554 cpu_put_ccr(env, tstate >> 32);
2555 cpu_put_cwp64(env, tstate & 0x1f);
2556 err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
2557 err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
2558 err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
2559 err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
2560 err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
2561 err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
2562 err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
2563 err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
2564 err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
2565 err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
2566 err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
2567 err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
2568 err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
2569 err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
2570 err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
2571
2572 err |= __get_user(fp, &(ucp->tuc_mcontext.mc_fp));
2573 err |= __get_user(i7, &(ucp->tuc_mcontext.mc_i7));
2574
2575 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2576 if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2577 abi_ulong) != 0)
2578 goto do_sigsegv;
2579 if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2580 abi_ulong) != 0)
2581 goto do_sigsegv;
2582 /* FIXME this does not match how the kernel handles the FPU in
2583 * its sparc64_set_context implementation. In particular the FPU
2584 * is only restored if fenab is non-zero in:
2585 * __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab));
2586 */
2587 err |= __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs));
2588 {
2589 uint32_t *src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2590 for (i = 0; i < 64; i++, src++) {
2591 if (i & 1) {
2592 err |= __get_user(env->fpr[i/2].l.lower, src);
2593 } else {
2594 err |= __get_user(env->fpr[i/2].l.upper, src);
2595 }
2596 }
2597 }
2598 err |= __get_user(env->fsr,
2599 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr));
2600 err |= __get_user(env->gsr,
2601 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr));
2602 if (err)
2603 goto do_sigsegv;
2604 unlock_user_struct(ucp, ucp_addr, 0);
2605 return;
2606 do_sigsegv:
2607 unlock_user_struct(ucp, ucp_addr, 0);
2608 force_sig(TARGET_SIGSEGV);
2609 }
2610
2611 void sparc64_get_context(CPUSPARCState *env)
2612 {
2613 abi_ulong ucp_addr;
2614 struct target_ucontext *ucp;
2615 target_mc_gregset_t *grp;
2616 target_mcontext_t *mcp;
2617 abi_ulong fp, i7, w_addr;
2618 int err;
2619 unsigned int i;
2620 target_sigset_t target_set;
2621 sigset_t set;
2622
2623 ucp_addr = env->regwptr[UREG_I0];
2624 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0))
2625 goto do_sigsegv;
2626
2627 mcp = &ucp->tuc_mcontext;
2628 grp = &mcp->mc_gregs;
2629
2630 /* Skip over the trap instruction, first. */
2631 env->pc = env->npc;
2632 env->npc += 4;
2633
2634 err = 0;
2635
2636 sigprocmask(0, NULL, &set);
2637 host_to_target_sigset_internal(&target_set, &set);
2638 if (TARGET_NSIG_WORDS == 1) {
2639 err |= __put_user(target_set.sig[0],
2640 (abi_ulong *)&ucp->tuc_sigmask);
2641 } else {
2642 abi_ulong *src, *dst;
2643 src = target_set.sig;
2644 dst = ucp->tuc_sigmask.sig;
2645 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2646 i++, dst++, src++)
2647 err |= __put_user(*src, dst);
2648 if (err)
2649 goto do_sigsegv;
2650 }
2651
2652 /* XXX: tstate must be saved properly */
2653 // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
2654 err |= __put_user(env->pc, &((*grp)[MC_PC]));
2655 err |= __put_user(env->npc, &((*grp)[MC_NPC]));
2656 err |= __put_user(env->y, &((*grp)[MC_Y]));
2657 err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
2658 err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
2659 err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
2660 err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
2661 err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
2662 err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
2663 err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
2664 err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
2665 err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
2666 err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
2667 err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
2668 err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
2669 err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
2670 err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
2671 err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
2672
2673 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2674 fp = i7 = 0;
2675 if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2676 abi_ulong) != 0)
2677 goto do_sigsegv;
2678 if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2679 abi_ulong) != 0)
2680 goto do_sigsegv;
2681 err |= __put_user(fp, &(mcp->mc_fp));
2682 err |= __put_user(i7, &(mcp->mc_i7));
2683
2684 {
2685 uint32_t *dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2686 for (i = 0; i < 64; i++, dst++) {
2687 if (i & 1) {
2688 err |= __put_user(env->fpr[i/2].l.lower, dst);
2689 } else {
2690 err |= __put_user(env->fpr[i/2].l.upper, dst);
2691 }
2692 }
2693 }
2694 err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
2695 err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
2696 err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
2697
2698 if (err)
2699 goto do_sigsegv;
2700 unlock_user_struct(ucp, ucp_addr, 1);
2701 return;
2702 do_sigsegv:
2703 unlock_user_struct(ucp, ucp_addr, 1);
2704 force_sig(TARGET_SIGSEGV);
2705 }
2706 #endif
2707 #elif defined(TARGET_MIPS) || defined(TARGET_MIPS64)
2708
2709 # if defined(TARGET_ABI_MIPSO32)
2710 struct target_sigcontext {
2711 uint32_t sc_regmask; /* Unused */
2712 uint32_t sc_status;
2713 uint64_t sc_pc;
2714 uint64_t sc_regs[32];
2715 uint64_t sc_fpregs[32];
2716 uint32_t sc_ownedfp; /* Unused */
2717 uint32_t sc_fpc_csr;
2718 uint32_t sc_fpc_eir; /* Unused */
2719 uint32_t sc_used_math;
2720 uint32_t sc_dsp; /* dsp status, was sc_ssflags */
2721 uint32_t pad0;
2722 uint64_t sc_mdhi;
2723 uint64_t sc_mdlo;
2724 target_ulong sc_hi1; /* Was sc_cause */
2725 target_ulong sc_lo1; /* Was sc_badvaddr */
2726 target_ulong sc_hi2; /* Was sc_sigset[4] */
2727 target_ulong sc_lo2;
2728 target_ulong sc_hi3;
2729 target_ulong sc_lo3;
2730 };
2731 # else /* N32 || N64 */
2732 struct target_sigcontext {
2733 uint64_t sc_regs[32];
2734 uint64_t sc_fpregs[32];
2735 uint64_t sc_mdhi;
2736 uint64_t sc_hi1;
2737 uint64_t sc_hi2;
2738 uint64_t sc_hi3;
2739 uint64_t sc_mdlo;
2740 uint64_t sc_lo1;
2741 uint64_t sc_lo2;
2742 uint64_t sc_lo3;
2743 uint64_t sc_pc;
2744 uint32_t sc_fpc_csr;
2745 uint32_t sc_used_math;
2746 uint32_t sc_dsp;
2747 uint32_t sc_reserved;
2748 };
2749 # endif /* O32 */
2750
2751 struct sigframe {
2752 uint32_t sf_ass[4]; /* argument save space for o32 */
2753 uint32_t sf_code[2]; /* signal trampoline */
2754 struct target_sigcontext sf_sc;
2755 target_sigset_t sf_mask;
2756 };
2757
2758 struct target_ucontext {
2759 target_ulong tuc_flags;
2760 target_ulong tuc_link;
2761 target_stack_t tuc_stack;
2762 target_ulong pad0;
2763 struct target_sigcontext tuc_mcontext;
2764 target_sigset_t tuc_sigmask;
2765 };
2766
2767 struct target_rt_sigframe {
2768 uint32_t rs_ass[4]; /* argument save space for o32 */
2769 uint32_t rs_code[2]; /* signal trampoline */
2770 struct target_siginfo rs_info;
2771 struct target_ucontext rs_uc;
2772 };
2773
2774 /* Install trampoline to jump back from signal handler */
2775 static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
2776 {
2777 int err = 0;
2778
2779 /*
2780 * Set up the return code ...
2781 *
2782 * li v0, __NR__foo_sigreturn
2783 * syscall
2784 */
2785
2786 err |= __put_user(0x24020000 + syscall, tramp + 0);
2787 err |= __put_user(0x0000000c , tramp + 1);
2788 return err;
2789 }
2790
2791 static inline int
2792 setup_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc)
2793 {
2794 int err = 0;
2795 int i;
2796
2797 err |= __put_user(exception_resume_pc(regs), &sc->sc_pc);
2798 regs->hflags &= ~MIPS_HFLAG_BMASK;
2799
2800 __put_user(0, &sc->sc_regs[0]);
2801 for (i = 1; i < 32; ++i) {
2802 err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
2803 }
2804
2805 err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2806 err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2807
2808 /* Rather than checking for dsp existence, always copy. The storage
2809 would just be garbage otherwise. */
2810 err |= __put_user(regs->active_tc.HI[1], &sc->sc_hi1);
2811 err |= __put_user(regs->active_tc.HI[2], &sc->sc_hi2);
2812 err |= __put_user(regs->active_tc.HI[3], &sc->sc_hi3);
2813 err |= __put_user(regs->active_tc.LO[1], &sc->sc_lo1);
2814 err |= __put_user(regs->active_tc.LO[2], &sc->sc_lo2);
2815 err |= __put_user(regs->active_tc.LO[3], &sc->sc_lo3);
2816 {
2817 uint32_t dsp = cpu_rddsp(0x3ff, regs);
2818 err |= __put_user(dsp, &sc->sc_dsp);
2819 }
2820
2821 err |= __put_user(1, &sc->sc_used_math);
2822
2823 for (i = 0; i < 32; ++i) {
2824 err |= __put_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
2825 }
2826
2827 return err;
2828 }
2829
2830 static inline int
2831 restore_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc)
2832 {
2833 int err = 0;
2834 int i;
2835
2836 err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
2837
2838 err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2839 err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2840
2841 for (i = 1; i < 32; ++i) {
2842 err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
2843 }
2844
2845 err |= __get_user(regs->active_tc.HI[1], &sc->sc_hi1);
2846 err |= __get_user(regs->active_tc.HI[2], &sc->sc_hi2);
2847 err |= __get_user(regs->active_tc.HI[3], &sc->sc_hi3);
2848 err |= __get_user(regs->active_tc.LO[1], &sc->sc_lo1);
2849 err |= __get_user(regs->active_tc.LO[2], &sc->sc_lo2);
2850 err |= __get_user(regs->active_tc.LO[3], &sc->sc_lo3);
2851 {
2852 uint32_t dsp;
2853 err |= __get_user(dsp, &sc->sc_dsp);
2854 cpu_wrdsp(dsp, 0x3ff, regs);
2855 }
2856
2857 for (i = 0; i < 32; ++i) {
2858 err |= __get_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
2859 }
2860
2861 return err;
2862 }
2863
2864 /*
2865 * Determine which stack to use..
2866 */
2867 static inline abi_ulong
2868 get_sigframe(struct target_sigaction *ka, CPUMIPSState *regs, size_t frame_size)
2869 {
2870 unsigned long sp;
2871
2872 /* Default to using normal stack */
2873 sp = regs->active_tc.gpr[29];
2874
2875 /*
2876 * FPU emulator may have its own trampoline active just
2877 * above the user stack, 16-bytes before the next lowest
2878 * 16 byte boundary. Try to avoid trashing it.
2879 */
2880 sp -= 32;
2881
2882 /* This is the X/Open sanctioned signal stack switching. */
2883 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
2884 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2885 }
2886
2887 return (sp - frame_size) & ~7;
2888 }
2889
2890 static void mips_set_hflags_isa_mode_from_pc(CPUMIPSState *env)
2891 {
2892 if (env->insn_flags & (ASE_MIPS16 | ASE_MICROMIPS)) {
2893 env->hflags &= ~MIPS_HFLAG_M16;
2894 env->hflags |= (env->active_tc.PC & 1) << MIPS_HFLAG_M16_SHIFT;
2895 env->active_tc.PC &= ~(target_ulong) 1;
2896 }
2897 }
2898
2899 # if defined(TARGET_ABI_MIPSO32)
2900 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */
2901 static void setup_frame(int sig, struct target_sigaction * ka,
2902 target_sigset_t *set, CPUMIPSState *regs)
2903 {
2904 struct sigframe *frame;
2905 abi_ulong frame_addr;
2906 int i;
2907
2908 frame_addr = get_sigframe(ka, regs, sizeof(*frame));
2909 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2910 goto give_sigsegv;
2911
2912 install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
2913
2914 if(setup_sigcontext(regs, &frame->sf_sc))
2915 goto give_sigsegv;
2916
2917 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2918 if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
2919 goto give_sigsegv;
2920 }
2921
2922 /*
2923 * Arguments to signal handler:
2924 *
2925 * a0 = signal number
2926 * a1 = 0 (should be cause)
2927 * a2 = pointer to struct sigcontext
2928 *
2929 * $25 and PC point to the signal handler, $29 points to the
2930 * struct sigframe.
2931 */
2932 regs->active_tc.gpr[ 4] = sig;
2933 regs->active_tc.gpr[ 5] = 0;
2934 regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
2935 regs->active_tc.gpr[29] = frame_addr;
2936 regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
2937 /* The original kernel code sets CP0_EPC to the handler
2938 * since it returns to userland using eret
2939 * we cannot do this here, and we must set PC directly */
2940 regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
2941 mips_set_hflags_isa_mode_from_pc(regs);
2942 unlock_user_struct(frame, frame_addr, 1);
2943 return;
2944
2945 give_sigsegv:
2946 unlock_user_struct(frame, frame_addr, 1);
2947 force_sig(TARGET_SIGSEGV/*, current*/);
2948 }
2949
2950 long do_sigreturn(CPUMIPSState *regs)
2951 {
2952 struct sigframe *frame;
2953 abi_ulong frame_addr;
2954 sigset_t blocked;
2955 target_sigset_t target_set;
2956 int i;
2957
2958 #if defined(DEBUG_SIGNAL)
2959 fprintf(stderr, "do_sigreturn\n");
2960 #endif
2961 frame_addr = regs->active_tc.gpr[29];
2962 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2963 goto badframe;
2964
2965 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2966 if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
2967 goto badframe;
2968 }
2969
2970 target_to_host_sigset_internal(&blocked, &target_set);
2971 sigprocmask(SIG_SETMASK, &blocked, NULL);
2972
2973 if (restore_sigcontext(regs, &frame->sf_sc))
2974 goto badframe;
2975
2976 #if 0
2977 /*
2978 * Don't let your children do this ...
2979 */
2980 __asm__ __volatile__(
2981 "move\t$29, %0\n\t"
2982 "j\tsyscall_exit"
2983 :/* no outputs */
2984 :"r" (&regs));
2985 /* Unreached */
2986 #endif
2987
2988 regs->active_tc.PC = regs->CP0_EPC;
2989 mips_set_hflags_isa_mode_from_pc(regs);
2990 /* I am not sure this is right, but it seems to work
2991 * maybe a problem with nested signals ? */
2992 regs->CP0_EPC = 0;
2993 return -TARGET_QEMU_ESIGRETURN;
2994
2995 badframe:
2996 force_sig(TARGET_SIGSEGV/*, current*/);
2997 return 0;
2998 }
2999 # endif /* O32 */
3000
3001 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3002 target_siginfo_t *info,
3003 target_sigset_t *set, CPUMIPSState *env)
3004 {
3005 struct target_rt_sigframe *frame;
3006 abi_ulong frame_addr;
3007 int i;
3008
3009 frame_addr = get_sigframe(ka, env, sizeof(*frame));
3010 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3011 goto give_sigsegv;
3012
3013 install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn);
3014
3015 copy_siginfo_to_user(&frame->rs_info, info);
3016
3017 __put_user(0, &frame->rs_uc.tuc_flags);
3018 __put_user(0, &frame->rs_uc.tuc_link);
3019 __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp);
3020 __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size);
3021 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
3022 &frame->rs_uc.tuc_stack.ss_flags);
3023
3024 setup_sigcontext(env, &frame->rs_uc.tuc_mcontext);
3025
3026 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
3027 __put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]);
3028 }
3029
3030 /*
3031 * Arguments to signal handler:
3032 *
3033 * a0 = signal number
3034 * a1 = pointer to siginfo_t
3035 * a2 = pointer to struct ucontext
3036 *
3037 * $25 and PC point to the signal handler, $29 points to the
3038 * struct sigframe.
3039 */
3040 env->active_tc.gpr[ 4] = sig;
3041 env->active_tc.gpr[ 5] = frame_addr
3042 + offsetof(struct target_rt_sigframe, rs_info);
3043 env->active_tc.gpr[ 6] = frame_addr
3044 + offsetof(struct target_rt_sigframe, rs_uc);
3045 env->active_tc.gpr[29] = frame_addr;
3046 env->active_tc.gpr[31] = frame_addr
3047 + offsetof(struct target_rt_sigframe, rs_code);
3048 /* The original kernel code sets CP0_EPC to the handler
3049 * since it returns to userland using eret
3050 * we cannot do this here, and we must set PC directly */
3051 env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
3052 mips_set_hflags_isa_mode_from_pc(env);
3053 unlock_user_struct(frame, frame_addr, 1);
3054 return;
3055
3056 give_sigsegv:
3057 unlock_user_struct(frame, frame_addr, 1);
3058 force_sig(TARGET_SIGSEGV/*, current*/);
3059 }
3060
3061 long do_rt_sigreturn(CPUMIPSState *env)
3062 {
3063 struct target_rt_sigframe *frame;
3064 abi_ulong frame_addr;
3065 sigset_t blocked;
3066
3067 #if defined(DEBUG_SIGNAL)
3068 fprintf(stderr, "do_rt_sigreturn\n");
3069 #endif
3070 frame_addr = env->active_tc.gpr[29];
3071 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3072 goto badframe;
3073
3074 target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask);
3075 sigprocmask(SIG_SETMASK, &blocked, NULL);
3076
3077 if (restore_sigcontext(env, &frame->rs_uc.tuc_mcontext))
3078 goto badframe;
3079
3080 if (do_sigaltstack(frame_addr +
3081 offsetof(struct target_rt_sigframe, rs_uc.tuc_stack),
3082 0, get_sp_from_cpustate(env)) == -EFAULT)
3083 goto badframe;
3084
3085 env->active_tc.PC = env->CP0_EPC;
3086 mips_set_hflags_isa_mode_from_pc(env);
3087 /* I am not sure this is right, but it seems to work
3088 * maybe a problem with nested signals ? */
3089 env->CP0_EPC = 0;
3090 return -TARGET_QEMU_ESIGRETURN;
3091
3092 badframe:
3093 force_sig(TARGET_SIGSEGV/*, current*/);
3094 return 0;
3095 }
3096
3097 #elif defined(TARGET_SH4)
3098
3099 /*
3100 * code and data structures from linux kernel:
3101 * include/asm-sh/sigcontext.h
3102 * arch/sh/kernel/signal.c
3103 */
3104
3105 struct target_sigcontext {
3106 target_ulong oldmask;
3107
3108 /* CPU registers */
3109 target_ulong sc_gregs[16];
3110 target_ulong sc_pc;
3111 target_ulong sc_pr;
3112 target_ulong sc_sr;
3113 target_ulong sc_gbr;
3114 target_ulong sc_mach;
3115 target_ulong sc_macl;
3116
3117 /* FPU registers */
3118 target_ulong sc_fpregs[16];
3119 target_ulong sc_xfpregs[16];
3120 unsigned int sc_fpscr;
3121 unsigned int sc_fpul;
3122 unsigned int sc_ownedfp;
3123 };
3124
3125 struct target_sigframe
3126 {
3127 struct target_sigcontext sc;
3128 target_ulong extramask[TARGET_NSIG_WORDS-1];
3129 uint16_t retcode[3];
3130 };
3131
3132
3133 struct target_ucontext {
3134 target_ulong tuc_flags;
3135 struct target_ucontext *tuc_link;
3136 target_stack_t tuc_stack;
3137 struct target_sigcontext tuc_mcontext;
3138 target_sigset_t tuc_sigmask; /* mask last for extensibility */
3139 };
3140
3141 struct target_rt_sigframe
3142 {
3143 struct target_siginfo info;
3144 struct target_ucontext uc;
3145 uint16_t retcode[3];
3146 };
3147
3148
3149 #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
3150 #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
3151
3152 static abi_ulong get_sigframe(struct target_sigaction *ka,
3153 unsigned long sp, size_t frame_size)
3154 {
3155 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
3156 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3157 }
3158
3159 return (sp - frame_size) & -8ul;
3160 }
3161
3162 static int setup_sigcontext(struct target_sigcontext *sc,
3163 CPUSH4State *regs, unsigned long mask)
3164 {
3165 int err = 0;
3166 int i;
3167
3168 #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
3169 COPY(gregs[0]); COPY(gregs[1]);
3170 COPY(gregs[2]); COPY(gregs[3]);
3171 COPY(gregs[4]); COPY(gregs[5]);
3172 COPY(gregs[6]); COPY(gregs[7]);
3173 COPY(gregs[8]); COPY(gregs[9]);
3174 COPY(gregs[10]); COPY(gregs[11]);
3175 COPY(gregs[12]); COPY(gregs[13]);
3176 COPY(gregs[14]); COPY(gregs[15]);
3177 COPY(gbr); COPY(mach);
3178 COPY(macl); COPY(pr);
3179 COPY(sr); COPY(pc);
3180 #undef COPY
3181
3182 for (i=0; i<16; i++) {
3183 err |= __put_user(regs->fregs[i], &sc->sc_fpregs[i]);
3184 }
3185 err |= __put_user(regs->fpscr, &sc->sc_fpscr);
3186 err |= __put_user(regs->fpul, &sc->sc_fpul);
3187
3188 /* non-iBCS2 extensions.. */
3189 err |= __put_user(mask, &sc->oldmask);
3190
3191 return err;
3192 }
3193
3194 static int restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc,
3195 target_ulong *r0_p)
3196 {
3197 unsigned int err = 0;
3198 int i;
3199
3200 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
3201 COPY(gregs[1]);
3202 COPY(gregs[2]); COPY(gregs[3]);
3203 COPY(gregs[4]); COPY(gregs[5]);
3204 COPY(gregs[6]); COPY(gregs[7]);
3205 COPY(gregs[8]); COPY(gregs[9]);
3206 COPY(gregs[10]); COPY(gregs[11]);
3207 COPY(gregs[12]); COPY(gregs[13]);
3208 COPY(gregs[14]); COPY(gregs[15]);
3209 COPY(gbr); COPY(mach);
3210 COPY(macl); COPY(pr);
3211 COPY(sr); COPY(pc);
3212 #undef COPY
3213
3214 for (i=0; i<16; i++) {
3215 err |= __get_user(regs->fregs[i], &sc->sc_fpregs[i]);
3216 }
3217 err |= __get_user(regs->fpscr, &sc->sc_fpscr);
3218 err |= __get_user(regs->fpul, &sc->sc_fpul);
3219
3220 regs->tra = -1; /* disable syscall checks */
3221 err |= __get_user(*r0_p, &sc->sc_gregs[0]);
3222 return err;
3223 }
3224
3225 static void setup_frame(int sig, struct target_sigaction *ka,
3226 target_sigset_t *set, CPUSH4State *regs)
3227 {
3228 struct target_sigframe *frame;
3229 abi_ulong frame_addr;
3230 int i;
3231 int err = 0;
3232 int signal;
3233
3234 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
3235 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3236 goto give_sigsegv;
3237
3238 signal = current_exec_domain_sig(sig);
3239
3240 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
3241
3242 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
3243 err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
3244 }
3245
3246 /* Set up to return from userspace. If provided, use a stub
3247 already in userspace. */
3248 if (ka->sa_flags & TARGET_SA_RESTORER) {
3249 regs->pr = (unsigned long) ka->sa_restorer;
3250 } else {
3251 /* Generate return code (system call to sigreturn) */
3252 err |= __put_user(MOVW(2), &frame->retcode[0]);
3253 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
3254 err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
3255 regs->pr = (unsigned long) frame->retcode;
3256 }
3257
3258 if (err)
3259 goto give_sigsegv;
3260
3261 /* Set up registers for signal handler */
3262 regs->gregs[15] = frame_addr;
3263 regs->gregs[4] = signal; /* Arg for signal handler */
3264 regs->gregs[5] = 0;
3265 regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc);
3266 regs->pc = (unsigned long) ka->_sa_handler;
3267
3268 unlock_user_struct(frame, frame_addr, 1);
3269 return;
3270
3271 give_sigsegv:
3272 unlock_user_struct(frame, frame_addr, 1);
3273 force_sig(TARGET_SIGSEGV);
3274 }
3275
3276 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3277 target_siginfo_t *info,
3278 target_sigset_t *set, CPUSH4State *regs)
3279 {
3280 struct target_rt_sigframe *frame;
3281 abi_ulong frame_addr;
3282 int i;
3283 int err = 0;
3284 int signal;
3285
3286 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
3287 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3288 goto give_sigsegv;
3289
3290 signal = current_exec_domain_sig(sig);
3291
3292 err |= copy_siginfo_to_user(&frame->info, info);
3293
3294 /* Create the ucontext. */
3295 err |= __put_user(0, &frame->uc.tuc_flags);
3296 err |= __put_user(0, (unsigned long *)&frame->uc.tuc_link);
3297 err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp,
3298 &frame->uc.tuc_stack.ss_sp);
3299 err |= __put_user(sas_ss_flags(regs->gregs[15]),
3300 &frame->uc.tuc_stack.ss_flags);
3301 err |= __put_user(target_sigaltstack_used.ss_size,
3302 &frame->uc.tuc_stack.ss_size);
3303 err |= setup_sigcontext(&frame->uc.tuc_mcontext,
3304 regs, set->sig[0]);
3305 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
3306 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
3307 }
3308
3309 /* Set up to return from userspace. If provided, use a stub
3310 already in userspace. */
3311 if (ka->sa_flags & TARGET_SA_RESTORER) {
3312 regs->pr = (unsigned long) ka->sa_restorer;
3313 } else {
3314 /* Generate return code (system call to sigreturn) */
3315 err |= __put_user(MOVW(2), &frame->retcode[0]);
3316 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
3317 err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
3318 regs->pr = (unsigned long) frame->retcode;
3319 }
3320
3321 if (err)
3322 goto give_sigsegv;
3323
3324 /* Set up registers for signal handler */
3325 regs->gregs[15] = frame_addr;
3326 regs->gregs[4] = signal; /* Arg for signal handler */
3327 regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info);
3328 regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc);
3329 regs->pc = (unsigned long) ka->_sa_handler;
3330
3331 unlock_user_struct(frame, frame_addr, 1);
3332 return;
3333
3334 give_sigsegv:
3335 unlock_user_struct(frame, frame_addr, 1);
3336 force_sig(TARGET_SIGSEGV);
3337 }
3338
3339 long do_sigreturn(CPUSH4State *regs)
3340 {
3341 struct target_sigframe *frame;
3342 abi_ulong frame_addr;
3343 sigset_t blocked;
3344 target_sigset_t target_set;
3345 target_ulong r0;
3346 int i;
3347 int err = 0;
3348
3349 #if defined(DEBUG_SIGNAL)
3350 fprintf(stderr, "do_sigreturn\n");
3351 #endif
3352 frame_addr = regs->gregs[15];
3353 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3354 goto badframe;
3355
3356 err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
3357 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3358 err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
3359 }
3360
3361 if (err)
3362 goto badframe;
3363
3364 target_to_host_sigset_internal(&blocked, &target_set);
3365 sigprocmask(SIG_SETMASK, &blocked, NULL);
3366
3367 if (restore_sigcontext(regs, &frame->sc, &r0))
3368 goto badframe;
3369
3370 unlock_user_struct(frame, frame_addr, 0);
3371 return r0;
3372
3373 badframe:
3374 unlock_user_struct(frame, frame_addr, 0);
3375 force_sig(TARGET_SIGSEGV);
3376 return 0;
3377 }
3378
3379 long do_rt_sigreturn(CPUSH4State *regs)
3380 {
3381 struct target_rt_sigframe *frame;
3382 abi_ulong frame_addr;
3383 sigset_t blocked;
3384 target_ulong r0;
3385
3386 #if defined(DEBUG_SIGNAL)
3387 fprintf(stderr, "do_rt_sigreturn\n");
3388 #endif
3389 frame_addr = regs->gregs[15];
3390 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3391 goto badframe;
3392
3393 target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask);
3394 sigprocmask(SIG_SETMASK, &blocked, NULL);
3395
3396 if (restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0))
3397 goto badframe;
3398
3399 if (do_sigaltstack(frame_addr +
3400 offsetof(struct target_rt_sigframe, uc.tuc_stack),
3401 0, get_sp_from_cpustate(regs)) == -EFAULT)
3402 goto badframe;
3403
3404 unlock_user_struct(frame, frame_addr, 0);
3405 return r0;
3406
3407 badframe:
3408 unlock_user_struct(frame, frame_addr, 0);
3409 force_sig(TARGET_SIGSEGV);
3410 return 0;
3411 }
3412 #elif defined(TARGET_MICROBLAZE)
3413
3414 struct target_sigcontext {
3415 struct target_pt_regs regs; /* needs to be first */
3416 uint32_t oldmask;
3417 };
3418
3419 struct target_stack_t {
3420 abi_ulong ss_sp;
3421 int ss_flags;
3422 unsigned int ss_size;
3423 };
3424
3425 struct target_ucontext {
3426 abi_ulong tuc_flags;
3427 abi_ulong tuc_link;
3428 struct target_stack_t tuc_stack;
3429 struct target_sigcontext tuc_mcontext;
3430 uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1];
3431 };
3432
3433 /* Signal frames. */
3434 struct target_signal_frame {
3435 struct target_ucontext uc;
3436 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3437 uint32_t tramp[2];
3438 };
3439
3440 struct rt_signal_frame {
3441 siginfo_t info;
3442 struct ucontext uc;
3443 uint32_t tramp[2];
3444 };
3445
3446 static void setup_sigcontext(struct target_sigcontext *sc, CPUMBState *env)
3447 {
3448 __put_user(env->regs[0], &sc->regs.r0);
3449 __put_user(env->regs[1], &sc->regs.r1);
3450 __put_user(env->regs[2], &sc->regs.r2);
3451 __put_user(env->regs[3], &sc->regs.r3);
3452 __put_user(env->regs[4], &sc->regs.r4);
3453 __put_user(env->regs[5], &sc->regs.r5);
3454 __put_user(env->regs[6], &sc->regs.r6);
3455 __put_user(env->regs[7], &sc->regs.r7);
3456 __put_user(env->regs[8], &sc->regs.r8);
3457 __put_user(env->regs[9], &sc->regs.r9);
3458 __put_user(env->regs[10], &sc->regs.r10);
3459 __put_user(env->regs[11], &sc->regs.r11);
3460 __put_user(env->regs[12], &sc->regs.r12);
3461 __put_user(env->regs[13], &sc->regs.r13);
3462 __put_user(env->regs[14], &sc->regs.r14);
3463 __put_user(env->regs[15], &sc->regs.r15);
3464 __put_user(env->regs[16], &sc->regs.r16);
3465 __put_user(env->regs[17], &sc->regs.r17);
3466 __put_user(env->regs[18], &sc->regs.r18);
3467 __put_user(env->regs[19], &sc->regs.r19);
3468 __put_user(env->regs[20], &sc->regs.r20);
3469 __put_user(env->regs[21], &sc->regs.r21);
3470 __put_user(env->regs[22], &sc->regs.r22);
3471 __put_user(env->regs[23], &sc->regs.r23);
3472 __put_user(env->regs[24], &sc->regs.r24);
3473 __put_user(env->regs[25], &sc->regs.r25);
3474 __put_user(env->regs[26], &sc->regs.r26);
3475 __put_user(env->regs[27], &sc->regs.r27);
3476 __put_user(env->regs[28], &sc->regs.r28);
3477 __put_user(env->regs[29], &sc->regs.r29);
3478 __put_user(env->regs[30], &sc->regs.r30);
3479 __put_user(env->regs[31], &sc->regs.r31);
3480 __put_user(env->sregs[SR_PC], &sc->regs.pc);
3481 }
3482
3483 static void restore_sigcontext(struct target_sigcontext *sc, CPUMBState *env)
3484 {
3485 __get_user(env->regs[0], &sc->regs.r0);
3486 __get_user(env->regs[1], &sc->regs.r1);
3487 __get_user(env->regs[2], &sc->regs.r2);
3488 __get_user(env->regs[3], &sc->regs.r3);
3489 __get_user(env->regs[4], &sc->regs.r4);
3490 __get_user(env->regs[5], &sc->regs.r5);
3491 __get_user(env->regs[6], &sc->regs.r6);
3492 __get_user(env->regs[7], &sc->regs.r7);
3493 __get_user(env->regs[8], &sc->regs.r8);
3494 __get_user(env->regs[9], &sc->regs.r9);
3495 __get_user(env->regs[10], &sc->regs.r10);
3496 __get_user(env->regs[11], &sc->regs.r11);
3497 __get_user(env->regs[12], &sc->regs.r12);
3498 __get_user(env->regs[13], &sc->regs.r13);
3499 __get_user(env->regs[14], &sc->regs.r14);
3500 __get_user(env->regs[15], &sc->regs.r15);
3501 __get_user(env->regs[16], &sc->regs.r16);
3502 __get_user(env->regs[17], &sc->regs.r17);
3503 __get_user(env->regs[18], &sc->regs.r18);
3504 __get_user(env->regs[19], &sc->regs.r19);
3505 __get_user(env->regs[20], &sc->regs.r20);
3506 __get_user(env->regs[21], &sc->regs.r21);
3507 __get_user(env->regs[22], &sc->regs.r22);
3508 __get_user(env->regs[23], &sc->regs.r23);
3509 __get_user(env->regs[24], &sc->regs.r24);
3510 __get_user(env->regs[25], &sc->regs.r25);
3511 __get_user(env->regs[26], &sc->regs.r26);
3512 __get_user(env->regs[27], &sc->regs.r27);
3513 __get_user(env->regs[28], &sc->regs.r28);
3514 __get_user(env->regs[29], &sc->regs.r29);
3515 __get_user(env->regs[30], &sc->regs.r30);
3516 __get_user(env->regs[31], &sc->regs.r31);
3517 __get_user(env->sregs[SR_PC], &sc->regs.pc);
3518 }
3519
3520 static abi_ulong get_sigframe(struct target_sigaction *ka,
3521 CPUMBState *env, int frame_size)
3522 {
3523 abi_ulong sp = env->regs[1];
3524
3525 if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp))
3526 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3527
3528 return ((sp - frame_size) & -8UL);
3529 }
3530
3531 static void setup_frame(int sig, struct target_sigaction *ka,
3532 target_sigset_t *set, CPUMBState *env)
3533 {
3534 struct target_signal_frame *frame;
3535 abi_ulong frame_addr;
3536 int err = 0;
3537 int i;
3538
3539 frame_addr = get_sigframe(ka, env, sizeof *frame);
3540 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3541 goto badframe;
3542
3543 /* Save the mask. */
3544 err |= __put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask);
3545 if (err)
3546 goto badframe;
3547
3548 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3549 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
3550 goto badframe;
3551 }
3552
3553 setup_sigcontext(&frame->uc.tuc_mcontext, env);
3554
3555 /* Set up to return from userspace. If provided, use a stub
3556 already in userspace. */
3557 /* minus 8 is offset to cater for "rtsd r15,8" offset */
3558 if (ka->sa_flags & TARGET_SA_RESTORER) {
3559 env->regs[15] = ((unsigned long)ka->sa_restorer)-8;
3560 } else {
3561 uint32_t t;
3562 /* Note, these encodings are _big endian_! */
3563 /* addi r12, r0, __NR_sigreturn */
3564 t = 0x31800000UL | TARGET_NR_sigreturn;
3565 err |= __put_user(t, frame->tramp + 0);
3566 /* brki r14, 0x8 */
3567 t = 0xb9cc0008UL;
3568 err |= __put_user(t, frame->tramp + 1);
3569
3570 /* Return from sighandler will jump to the tramp.
3571 Negative 8 offset because return is rtsd r15, 8 */
3572 env->regs[15] = ((unsigned long)frame->tramp) - 8;
3573 }
3574
3575 if (err)
3576 goto badframe;
3577
3578 /* Set up registers for signal handler */
3579 env->regs[1] = frame_addr;
3580 /* Signal handler args: */
3581 env->regs[5] = sig; /* Arg 0: signum */
3582 env->regs[6] = 0;
3583 /* arg 1: sigcontext */
3584 env->regs[7] = frame_addr += offsetof(typeof(*frame), uc);
3585
3586 /* Offset of 4 to handle microblaze rtid r14, 0 */
3587 env->sregs[SR_PC] = (unsigned long)ka->_sa_handler;
3588
3589 unlock_user_struct(frame, frame_addr, 1);
3590 return;
3591 badframe:
3592 unlock_user_struct(frame, frame_addr, 1);
3593 force_sig(TARGET_SIGSEGV);
3594 }
3595
3596 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3597 target_siginfo_t *info,
3598 target_sigset_t *set, CPUMBState *env)
3599 {
3600 fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n");
3601 }
3602
3603 long do_sigreturn(CPUMBState *env)
3604 {
3605 struct target_signal_frame *frame;
3606 abi_ulong frame_addr;
3607 target_sigset_t target_set;
3608 sigset_t set;
3609 int i;
3610
3611 frame_addr = env->regs[R_SP];
3612 /* Make sure the guest isn't playing games. */
3613 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3614 goto badframe;
3615
3616 /* Restore blocked signals */
3617 if (__get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask))
3618 goto badframe;
3619 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3620 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3621 goto badframe;
3622 }
3623 target_to_host_sigset_internal(&set, &target_set);
3624 sigprocmask(SIG_SETMASK, &set, NULL);
3625
3626 restore_sigcontext(&frame->uc.tuc_mcontext, env);
3627 /* We got here through a sigreturn syscall, our path back is via an
3628 rtb insn so setup r14 for that. */
3629 env->regs[14] = env->sregs[SR_PC];
3630
3631 unlock_user_struct(frame, frame_addr, 0);
3632 return env->regs[10];
3633 badframe:
3634 unlock_user_struct(frame, frame_addr, 0);
3635 force_sig(TARGET_SIGSEGV);
3636 }
3637
3638 long do_rt_sigreturn(CPUMBState *env)
3639 {
3640 fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n");
3641 return -TARGET_ENOSYS;
3642 }
3643
3644 #elif defined(TARGET_CRIS)
3645
3646 struct target_sigcontext {
3647 struct target_pt_regs regs; /* needs to be first */
3648 uint32_t oldmask;
3649 uint32_t usp; /* usp before stacking this gunk on it */
3650 };
3651
3652 /* Signal frames. */
3653 struct target_signal_frame {
3654 struct target_sigcontext sc;
3655 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3656 uint8_t retcode[8]; /* Trampoline code. */
3657 };
3658
3659 struct rt_signal_frame {
3660 siginfo_t *pinfo;
3661 void *puc;
3662 siginfo_t info;
3663 struct ucontext uc;
3664 uint8_t retcode[8]; /* Trampoline code. */
3665 };
3666
3667 static void setup_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
3668 {
3669 __put_user(env->regs[0], &sc->regs.r0);
3670 __put_user(env->regs[1], &sc->regs.r1);
3671 __put_user(env->regs[2], &sc->regs.r2);
3672 __put_user(env->regs[3], &sc->regs.r3);
3673 __put_user(env->regs[4], &sc->regs.r4);
3674 __put_user(env->regs[5], &sc->regs.r5);
3675 __put_user(env->regs[6], &sc->regs.r6);
3676 __put_user(env->regs[7], &sc->regs.r7);
3677 __put_user(env->regs[8], &sc->regs.r8);
3678 __put_user(env->regs[9], &sc->regs.r9);
3679 __put_user(env->regs[10], &sc->regs.r10);
3680 __put_user(env->regs[11], &sc->regs.r11);
3681 __put_user(env->regs[12], &sc->regs.r12);
3682 __put_user(env->regs[13], &sc->regs.r13);
3683 __put_user(env->regs[14], &sc->usp);
3684 __put_user(env->regs[15], &sc->regs.acr);
3685 __put_user(env->pregs[PR_MOF], &sc->regs.mof);
3686 __put_user(env->pregs[PR_SRP], &sc->regs.srp);
3687 __put_user(env->pc, &sc->regs.erp);
3688 }
3689
3690 static void restore_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
3691 {
3692 __get_user(env->regs[0], &sc->regs.r0);
3693 __get_user(env->regs[1], &sc->regs.r1);
3694 __get_user(env->regs[2], &sc->regs.r2);
3695 __get_user(env->regs[3], &sc->regs.r3);
3696 __get_user(env->regs[4], &sc->regs.r4);
3697 __get_user(env->regs[5], &sc->regs.r5);
3698 __get_user(env->regs[6], &sc->regs.r6);
3699 __get_user(env->regs[7], &sc->regs.r7);
3700 __get_user(env->regs[8], &sc->regs.r8);
3701 __get_user(env->regs[9], &sc->regs.r9);
3702 __get_user(env->regs[10], &sc->regs.r10);
3703 __get_user(env->regs[11], &sc->regs.r11);
3704 __get_user(env->regs[12], &sc->regs.r12);
3705 __get_user(env->regs[13], &sc->regs.r13);
3706 __get_user(env->regs[14], &sc->usp);
3707 __get_user(env->regs[15], &sc->regs.acr);
3708 __get_user(env->pregs[PR_MOF], &sc->regs.mof);
3709 __get_user(env->pregs[PR_SRP], &sc->regs.srp);
3710 __get_user(env->pc, &sc->regs.erp);
3711 }
3712
3713 static abi_ulong get_sigframe(CPUCRISState *env, int framesize)
3714 {
3715 abi_ulong sp;
3716 /* Align the stack downwards to 4. */
3717 sp = (env->regs[R_SP] & ~3);
3718 return sp - framesize;
3719 }
3720
3721 static void setup_frame(int sig, struct target_sigaction *ka,
3722 target_sigset_t *set, CPUCRISState *env)
3723 {
3724 struct target_signal_frame *frame;
3725 abi_ulong frame_addr;
3726 int err = 0;
3727 int i;
3728
3729 frame_addr = get_sigframe(env, sizeof *frame);
3730 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3731 goto badframe;
3732
3733 /*
3734 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
3735 * use this trampoline anymore but it sets it up for GDB.
3736 * In QEMU, using the trampoline simplifies things a bit so we use it.
3737 *
3738 * This is movu.w __NR_sigreturn, r9; break 13;
3739 */
3740 err |= __put_user(0x9c5f, frame->retcode+0);
3741 err |= __put_user(TARGET_NR_sigreturn,
3742 frame->retcode+2);
3743 err |= __put_user(0xe93d, frame->retcode+4);
3744
3745 /* Save the mask. */
3746 err |= __put_user(set->sig[0], &frame->sc.oldmask);
3747 if (err)
3748 goto badframe;
3749
3750 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3751 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
3752 goto badframe;
3753 }
3754
3755 setup_sigcontext(&frame->sc, env);
3756
3757 /* Move the stack and setup the arguments for the handler. */
3758 env->regs[R_SP] = frame_addr;
3759 env->regs[10] = sig;
3760 env->pc = (unsigned long) ka->_sa_handler;
3761 /* Link SRP so the guest returns through the trampoline. */
3762 env->pregs[PR_SRP] = frame_addr + offsetof(typeof(*frame), retcode);
3763
3764 unlock_user_struct(frame, frame_addr, 1);
3765 return;
3766 badframe:
3767 unlock_user_struct(frame, frame_addr, 1);
3768 force_sig(TARGET_SIGSEGV);
3769 }
3770
3771 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3772 target_siginfo_t *info,
3773 target_sigset_t *set, CPUCRISState *env)
3774 {
3775 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
3776 }
3777
3778 long do_sigreturn(CPUCRISState *env)
3779 {
3780 struct target_signal_frame *frame;
3781 abi_ulong frame_addr;
3782 target_sigset_t target_set;
3783 sigset_t set;
3784 int i;
3785
3786 frame_addr = env->regs[R_SP];
3787 /* Make sure the guest isn't playing games. */
3788 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3789 goto badframe;
3790
3791 /* Restore blocked signals */
3792 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
3793 goto badframe;
3794 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3795 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3796 goto badframe;
3797 }
3798 target_to_host_sigset_internal(&set, &target_set);
3799 sigprocmask(SIG_SETMASK, &set, NULL);
3800
3801 restore_sigcontext(&frame->sc, env);
3802 unlock_user_struct(frame, frame_addr, 0);
3803 return env->regs[10];
3804 badframe:
3805 unlock_user_struct(frame, frame_addr, 0);
3806 force_sig(TARGET_SIGSEGV);
3807 }
3808
3809 long do_rt_sigreturn(CPUCRISState *env)
3810 {
3811 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
3812 return -TARGET_ENOSYS;
3813 }
3814
3815 #elif defined(TARGET_OPENRISC)
3816
3817 struct target_sigcontext {
3818 struct target_pt_regs regs;
3819 abi_ulong oldmask;
3820 abi_ulong usp;
3821 };
3822
3823 struct target_ucontext {
3824 abi_ulong tuc_flags;
3825 abi_ulong tuc_link;
3826 target_stack_t tuc_stack;
3827 struct target_sigcontext tuc_mcontext;
3828 target_sigset_t tuc_sigmask; /* mask last for extensibility */
3829 };
3830
3831 struct target_rt_sigframe {
3832 abi_ulong pinfo;
3833 uint64_t puc;
3834 struct target_siginfo info;
3835 struct target_sigcontext sc;
3836 struct target_ucontext uc;
3837 unsigned char retcode[16]; /* trampoline code */
3838 };
3839
3840 /* This is the asm-generic/ucontext.h version */
3841 #if 0
3842 static int restore_sigcontext(CPUOpenRISCState *regs,
3843 struct target_sigcontext *sc)
3844 {
3845 unsigned int err = 0;
3846 unsigned long old_usp;
3847
3848 /* Alwys make any pending restarted system call return -EINTR */
3849 current_thread_info()->restart_block.fn = do_no_restart_syscall;
3850
3851 /* restore the regs from &sc->regs (same as sc, since regs is first)
3852 * (sc is already checked for VERIFY_READ since the sigframe was
3853 * checked in sys_sigreturn previously)
3854 */
3855
3856 if (copy_from_user(regs, &sc, sizeof(struct target_pt_regs))) {
3857 goto badframe;
3858 }
3859
3860 /* make sure the U-flag is set so user-mode cannot fool us */
3861
3862 regs->sr &= ~SR_SM;
3863
3864 /* restore the old USP as it was before we stacked the sc etc.
3865 * (we cannot just pop the sigcontext since we aligned the sp and
3866 * stuff after pushing it)
3867 */
3868
3869 err |= __get_user(old_usp, &sc->usp);
3870 phx_signal("old_usp 0x%lx", old_usp);
3871
3872 __PHX__ REALLY /* ??? */
3873 wrusp(old_usp);
3874 regs->gpr[1] = old_usp;
3875
3876 /* TODO: the other ports use regs->orig_XX to disable syscall checks
3877 * after this completes, but we don't use that mechanism. maybe we can
3878 * use it now ?
3879 */
3880
3881 return err;
3882
3883 badframe:
3884 return 1;
3885 }
3886 #endif
3887
3888 /* Set up a signal frame. */
3889
3890 static int setup_sigcontext(struct target_sigcontext *sc,
3891 CPUOpenRISCState *regs,
3892 unsigned long mask)
3893 {
3894 int err = 0;
3895 unsigned long usp = regs->gpr[1];
3896
3897 /* copy the regs. they are first in sc so we can use sc directly */
3898
3899 /*err |= copy_to_user(&sc, regs, sizeof(struct target_pt_regs));*/
3900
3901 /* Set the frametype to CRIS_FRAME_NORMAL for the execution of
3902 the signal handler. The frametype will be restored to its previous
3903 value in restore_sigcontext. */
3904 /*regs->frametype = CRIS_FRAME_NORMAL;*/
3905
3906 /* then some other stuff */
3907 err |= __put_user(mask, &sc->oldmask);
3908 err |= __put_user(usp, &sc->usp); return err;
3909 }
3910
3911 static inline unsigned long align_sigframe(unsigned long sp)
3912 {
3913 unsigned long i;
3914 i = sp & ~3UL;
3915 return i;
3916 }
3917
3918 static inline abi_ulong get_sigframe(struct target_sigaction *ka,
3919 CPUOpenRISCState *regs,
3920 size_t frame_size)
3921 {
3922 unsigned long sp = regs->gpr[1];
3923 int onsigstack = on_sig_stack(sp);
3924
3925 /* redzone */
3926 /* This is the X/Open sanctioned signal stack switching. */
3927 if ((ka->sa_flags & SA_ONSTACK) != 0 && !onsigstack) {
3928 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3929 }
3930
3931 sp = align_sigframe(sp - frame_size);
3932
3933 /*
3934 * If we are on the alternate signal stack and would overflow it, don't.
3935 * Return an always-bogus address instead so we will die with SIGSEGV.
3936 */
3937
3938 if (onsigstack && !likely(on_sig_stack(sp))) {
3939 return -1L;
3940 }
3941
3942 return sp;
3943 }
3944
3945 static void setup_frame(int sig, struct target_sigaction *ka,
3946 target_sigset_t *set, CPUOpenRISCState *env)
3947 {
3948 qemu_log("Not implement.\n");
3949 }
3950
3951 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3952 target_siginfo_t *info,
3953 target_sigset_t *set, CPUOpenRISCState *env)
3954 {
3955 int err = 0;
3956 abi_ulong frame_addr;
3957 unsigned long return_ip;
3958 struct target_rt_sigframe *frame;
3959 abi_ulong info_addr, uc_addr;
3960
3961 frame_addr = get_sigframe(ka, env, sizeof *frame);
3962
3963 frame_addr = get_sigframe(ka, env, sizeof(*frame));
3964 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3965 goto give_sigsegv;
3966 }
3967
3968 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
3969 err |= __put_user(info_addr, &frame->pinfo);
3970 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
3971 err |= __put_user(uc_addr, &frame->puc);
3972
3973 if (ka->sa_flags & SA_SIGINFO) {
3974 err |= copy_siginfo_to_user(&frame->info, info);
3975 }
3976 if (err) {
3977 goto give_sigsegv;
3978 }
3979
3980 /*err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));*/
3981 err |= __put_user(0, &frame->uc.tuc_flags);
3982 err |= __put_user(0, &frame->uc.tuc_link);
3983 err |= __put_user(target_sigaltstack_used.ss_sp,
3984 &frame->uc.tuc_stack.ss_sp);
3985 err |= __put_user(sas_ss_flags(env->gpr[1]), &frame->uc.tuc_stack.ss_flags);
3986 err |= __put_user(target_sigaltstack_used.ss_size,
3987 &frame->uc.tuc_stack.ss_size);
3988 err |= setup_sigcontext(&frame->sc, env, set->sig[0]);
3989
3990 /*err |= copy_to_user(frame->uc.tuc_sigmask, set, sizeof(*set));*/
3991
3992 if (err) {
3993 goto give_sigsegv;
3994 }
3995
3996 /* trampoline - the desired return ip is the retcode itself */
3997 return_ip = (unsigned long)&frame->retcode;
3998 /* This is l.ori r11,r0,__NR_sigreturn, l.sys 1 */
3999 err |= __put_user(0xa960, (short *)(frame->retcode + 0));
4000 err |= __put_user(TARGET_NR_rt_sigreturn, (short *)(frame->retcode + 2));
4001 err |= __put_user(0x20000001, (unsigned long *)(frame->retcode + 4));
4002 err |= __put_user(0x15000000, (unsigned long *)(frame->retcode + 8));
4003
4004 if (err) {
4005 goto give_sigsegv;
4006 }
4007
4008 /* TODO what is the current->exec_domain stuff and invmap ? */
4009
4010 /* Set up registers for signal handler */
4011 env->pc = (unsigned long)ka->_sa_handler; /* what we enter NOW */
4012 env->gpr[9] = (unsigned long)return_ip; /* what we enter LATER */
4013 env->gpr[3] = (unsigned long)sig; /* arg 1: signo */
4014 env->gpr[4] = (unsigned long)&frame->info; /* arg 2: (siginfo_t*) */
4015 env->gpr[5] = (unsigned long)&frame->uc; /* arg 3: ucontext */
4016
4017 /* actually move the usp to reflect the stacked frame */
4018 env->gpr[1] = (unsigned long)frame;
4019
4020 return;
4021
4022 give_sigsegv:
4023 unlock_user_struct(frame, frame_addr, 1);
4024 if (sig == TARGET_SIGSEGV) {
4025 ka->_sa_handler = TARGET_SIG_DFL;
4026 }
4027 force_sig(TARGET_SIGSEGV);
4028 }
4029
4030 long do_sigreturn(CPUOpenRISCState *env)
4031 {
4032
4033 qemu_log("do_sigreturn: not implemented\n");
4034 return -TARGET_ENOSYS;
4035 }
4036
4037 long do_rt_sigreturn(CPUOpenRISCState *env)
4038 {
4039 qemu_log("do_rt_sigreturn: not implemented\n");
4040 return -TARGET_ENOSYS;
4041 }
4042 /* TARGET_OPENRISC */
4043
4044 #elif defined(TARGET_S390X)
4045
4046 #define __NUM_GPRS 16
4047 #define __NUM_FPRS 16
4048 #define __NUM_ACRS 16
4049
4050 #define S390_SYSCALL_SIZE 2
4051 #define __SIGNAL_FRAMESIZE 160 /* FIXME: 31-bit mode -> 96 */
4052
4053 #define _SIGCONTEXT_NSIG 64
4054 #define _SIGCONTEXT_NSIG_BPW 64 /* FIXME: 31-bit mode -> 32 */
4055 #define _SIGCONTEXT_NSIG_WORDS (_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW)
4056 #define _SIGMASK_COPY_SIZE (sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS)
4057 #define PSW_ADDR_AMODE 0x0000000000000000UL /* 0x80000000UL for 31-bit */
4058 #define S390_SYSCALL_OPCODE ((uint16_t)0x0a00)
4059
4060 typedef struct {
4061 target_psw_t psw;
4062 target_ulong gprs[__NUM_GPRS];
4063 unsigned int acrs[__NUM_ACRS];
4064 } target_s390_regs_common;
4065
4066 typedef struct {
4067 unsigned int fpc;
4068 double fprs[__NUM_FPRS];
4069 } target_s390_fp_regs;
4070
4071 typedef struct {
4072 target_s390_regs_common regs;
4073 target_s390_fp_regs fpregs;
4074 } target_sigregs;
4075
4076 struct target_sigcontext {
4077 target_ulong oldmask[_SIGCONTEXT_NSIG_WORDS];
4078 target_sigregs *sregs;
4079 };
4080
4081 typedef struct {
4082 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
4083 struct target_sigcontext sc;
4084 target_sigregs sregs;
4085 int signo;
4086 uint8_t retcode[S390_SYSCALL_SIZE];
4087 } sigframe;
4088
4089 struct target_ucontext {
4090 target_ulong tuc_flags;
4091 struct target_ucontext *tuc_link;
4092 target_stack_t tuc_stack;
4093 target_sigregs tuc_mcontext;
4094 target_sigset_t tuc_sigmask; /* mask last for extensibility */
4095 };
4096
4097 typedef struct {
4098 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
4099 uint8_t retcode[S390_SYSCALL_SIZE];
4100 struct target_siginfo info;
4101 struct target_ucontext uc;
4102 } rt_sigframe;
4103
4104 static inline abi_ulong
4105 get_sigframe(struct target_sigaction *ka, CPUS390XState *env, size_t frame_size)
4106 {
4107 abi_ulong sp;
4108
4109 /* Default to using normal stack */
4110 sp = env->regs[15];
4111
4112 /* This is the X/Open sanctioned signal stack switching. */
4113 if (ka->sa_flags & TARGET_SA_ONSTACK) {
4114 if (!sas_ss_flags(sp)) {
4115 sp = target_sigaltstack_used.ss_sp +
4116 target_sigaltstack_used.ss_size;
4117 }
4118 }
4119
4120 /* This is the legacy signal stack switching. */
4121 else if (/* FIXME !user_mode(regs) */ 0 &&
4122 !(ka->sa_flags & TARGET_SA_RESTORER) &&
4123 ka->sa_restorer) {
4124 sp = (abi_ulong) ka->sa_restorer;
4125 }
4126
4127 return (sp - frame_size) & -8ul;
4128 }
4129
4130 static void save_sigregs(CPUS390XState *env, target_sigregs *sregs)
4131 {
4132 int i;
4133 //save_access_regs(current->thread.acrs); FIXME
4134
4135 /* Copy a 'clean' PSW mask to the user to avoid leaking
4136 information about whether PER is currently on. */
4137 __put_user(env->psw.mask, &sregs->regs.psw.mask);
4138 __put_user(env->psw.addr, &sregs->regs.psw.addr);
4139 for (i = 0; i < 16; i++) {
4140 __put_user(env->regs[i], &sregs->regs.gprs[i]);
4141 }
4142 for (i = 0; i < 16; i++) {
4143 __put_user(env->aregs[i], &sregs->regs.acrs[i]);
4144 }
4145 /*
4146 * We have to store the fp registers to current->thread.fp_regs
4147 * to merge them with the emulated registers.
4148 */
4149 //save_fp_regs(&current->thread.fp_regs); FIXME
4150 for (i = 0; i < 16; i++) {
4151 __put_user(env->fregs[i].ll, &sregs->fpregs.fprs[i]);
4152 }
4153 }
4154
4155 static void setup_frame(int sig, struct target_sigaction *ka,
4156 target_sigset_t *set, CPUS390XState *env)
4157 {
4158 sigframe *frame;
4159 abi_ulong frame_addr;
4160
4161 frame_addr = get_sigframe(ka, env, sizeof(*frame));
4162 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
4163 (unsigned long long)frame_addr);
4164 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
4165 goto give_sigsegv;
4166 }
4167
4168 qemu_log("%s: 1\n", __FUNCTION__);
4169 if (__put_user(set->sig[0], &frame->sc.oldmask[0])) {
4170 goto give_sigsegv;
4171 }
4172
4173 save_sigregs(env, &frame->sregs);
4174
4175 __put_user((abi_ulong)(unsigned long)&frame->sregs,
4176 (abi_ulong *)&frame->sc.sregs);
4177
4178 /* Set up to return from userspace. If provided, use a stub
4179 already in userspace. */
4180 if (ka->sa_flags & TARGET_SA_RESTORER) {
4181 env->regs[14] = (unsigned long)
4182 ka->sa_restorer | PSW_ADDR_AMODE;
4183 } else {
4184 env->regs[14] = (unsigned long)
4185 frame->retcode | PSW_ADDR_AMODE;
4186 if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn,
4187 (uint16_t *)(frame->retcode)))
4188 goto give_sigsegv;
4189 }
4190
4191 /* Set up backchain. */
4192 if (__put_user(env->regs[15], (abi_ulong *) frame)) {
4193 goto give_sigsegv;
4194 }
4195
4196 /* Set up registers for signal handler */
4197 env->regs[15] = frame_addr;
4198 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
4199
4200 env->regs[2] = sig; //map_signal(sig);
4201 env->regs[3] = frame_addr += offsetof(typeof(*frame), sc);
4202
4203 /* We forgot to include these in the sigcontext.
4204 To avoid breaking binary compatibility, they are passed as args. */
4205 env->regs[4] = 0; // FIXME: no clue... current->thread.trap_no;
4206 env->regs[5] = 0; // FIXME: no clue... current->thread.prot_addr;
4207
4208 /* Place signal number on stack to allow backtrace from handler. */
4209 if (__put_user(env->regs[2], (int *) &frame->signo)) {
4210 goto give_sigsegv;
4211 }
4212 unlock_user_struct(frame, frame_addr, 1);
4213 return;
4214
4215 give_sigsegv:
4216 qemu_log("%s: give_sigsegv\n", __FUNCTION__);
4217 unlock_user_struct(frame, frame_addr, 1);
4218 force_sig(TARGET_SIGSEGV);
4219 }
4220
4221 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4222 target_siginfo_t *info,
4223 target_sigset_t *set, CPUS390XState *env)
4224 {
4225 int i;
4226 rt_sigframe *frame;
4227 abi_ulong frame_addr;
4228
4229 frame_addr = get_sigframe(ka, env, sizeof *frame);
4230 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
4231 (unsigned long long)frame_addr);
4232 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
4233 goto give_sigsegv;
4234 }
4235
4236 qemu_log("%s: 1\n", __FUNCTION__);
4237 if (copy_siginfo_to_user(&frame->info, info)) {
4238 goto give_sigsegv;
4239 }
4240
4241 /* Create the ucontext. */
4242 __put_user(0, &frame->uc.tuc_flags);
4243 __put_user((abi_ulong)0, (abi_ulong *)&frame->uc.tuc_link);
4244 __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
4245 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
4246 &frame->uc.tuc_stack.ss_flags);
4247 __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size);
4248 save_sigregs(env, &frame->uc.tuc_mcontext);
4249 for (i = 0; i < TARGET_NSIG_WORDS; i++) {
4250 __put_user((abi_ulong)set->sig[i],
4251 (abi_ulong *)&frame->uc.tuc_sigmask.sig[i]);
4252 }
4253
4254 /* Set up to return from userspace. If provided, use a stub
4255 already in userspace. */
4256 if (ka->sa_flags & TARGET_SA_RESTORER) {
4257 env->regs[14] = (unsigned long) ka->sa_restorer | PSW_ADDR_AMODE;
4258 } else {
4259 env->regs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE;
4260 if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn,
4261 (uint16_t *)(frame->retcode))) {
4262 goto give_sigsegv;
4263 }
4264 }
4265
4266 /* Set up backchain. */
4267 if (__put_user(env->regs[15], (abi_ulong *) frame)) {
4268 goto give_sigsegv;
4269 }
4270
4271 /* Set up registers for signal handler */
4272 env->regs[15] = frame_addr;
4273 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
4274
4275 env->regs[2] = sig; //map_signal(sig);
4276 env->regs[3] = frame_addr + offsetof(typeof(*frame), info);
4277 env->regs[4] = frame_addr + offsetof(typeof(*frame), uc);
4278 return;
4279
4280 give_sigsegv:
4281 qemu_log("%s: give_sigsegv\n", __FUNCTION__);
4282 unlock_user_struct(frame, frame_addr, 1);
4283 force_sig(TARGET_SIGSEGV);
4284 }
4285
4286 static int
4287 restore_sigregs(CPUS390XState *env, target_sigregs *sc)
4288 {
4289 int err = 0;
4290 int i;
4291
4292 for (i = 0; i < 16; i++) {
4293 err |= __get_user(env->regs[i], &sc->regs.gprs[i]);
4294 }
4295
4296 err |= __get_user(env->psw.mask, &sc->regs.psw.mask);
4297 qemu_log("%s: sc->regs.psw.addr 0x%llx env->psw.addr 0x%llx\n",
4298 __FUNCTION__, (unsigned long long)sc->regs.psw.addr,
4299 (unsigned long long)env->psw.addr);
4300 err |= __get_user(env->psw.addr, &sc->regs.psw.addr);
4301 /* FIXME: 31-bit -> | PSW_ADDR_AMODE */
4302
4303 for (i = 0; i < 16; i++) {
4304 err |= __get_user(env->aregs[i], &sc->regs.acrs[i]);
4305 }
4306 for (i = 0; i < 16; i++) {
4307 err |= __get_user(env->fregs[i].ll, &sc->fpregs.fprs[i]);
4308 }
4309
4310 return err;
4311 }
4312
4313 long do_sigreturn(CPUS390XState *env)
4314 {
4315 sigframe *frame;
4316 abi_ulong frame_addr = env->regs[15];
4317 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
4318 (unsigned long long)frame_addr);
4319 target_sigset_t target_set;
4320 sigset_t set;
4321
4322 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
4323 goto badframe;
4324 }
4325 if (__get_user(target_set.sig[0], &frame->sc.oldmask[0])) {
4326 goto badframe;
4327 }
4328
4329 target_to_host_sigset_internal(&set, &target_set);
4330 sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */
4331
4332 if (restore_sigregs(env, &frame->sregs)) {
4333 goto badframe;
4334 }
4335
4336 unlock_user_struct(frame, frame_addr, 0);
4337 return env->regs[2];
4338
4339 badframe:
4340 unlock_user_struct(frame, frame_addr, 0);
4341 force_sig(TARGET_SIGSEGV);
4342 return 0;
4343 }
4344
4345 long do_rt_sigreturn(CPUS390XState *env)
4346 {
4347 rt_sigframe *frame;
4348 abi_ulong frame_addr = env->regs[15];
4349 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
4350 (unsigned long long)frame_addr);
4351 sigset_t set;
4352
4353 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
4354 goto badframe;
4355 }
4356 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
4357
4358 sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */
4359
4360 if (restore_sigregs(env, &frame->uc.tuc_mcontext)) {
4361 goto badframe;
4362 }
4363
4364 if (do_sigaltstack(frame_addr + offsetof(rt_sigframe, uc.tuc_stack), 0,
4365 get_sp_from_cpustate(env)) == -EFAULT) {
4366 goto badframe;
4367 }
4368 unlock_user_struct(frame, frame_addr, 0);
4369 return env->regs[2];
4370
4371 badframe:
4372 unlock_user_struct(frame, frame_addr, 0);
4373 force_sig(TARGET_SIGSEGV);
4374 return 0;
4375 }
4376
4377 #elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
4378
4379 /* FIXME: Many of the structures are defined for both PPC and PPC64, but
4380 the signal handling is different enough that we haven't implemented
4381 support for PPC64 yet. Hence the restriction above.
4382
4383 There are various #if'd blocks for code for TARGET_PPC64. These
4384 blocks should go away so that we can successfully run 32-bit and
4385 64-bit binaries on a QEMU configured for PPC64. */
4386
4387 /* Size of dummy stack frame allocated when calling signal handler.
4388 See arch/powerpc/include/asm/ptrace.h. */
4389 #if defined(TARGET_PPC64)
4390 #define SIGNAL_FRAMESIZE 128
4391 #else
4392 #define SIGNAL_FRAMESIZE 64
4393 #endif
4394
4395 /* See arch/powerpc/include/asm/sigcontext.h. */
4396 struct target_sigcontext {
4397 target_ulong _unused[4];
4398 int32_t signal;
4399 #if defined(TARGET_PPC64)
4400 int32_t pad0;
4401 #endif
4402 target_ulong handler;
4403 target_ulong oldmask;
4404 target_ulong regs; /* struct pt_regs __user * */
4405 /* TODO: PPC64 includes extra bits here. */
4406 };
4407
4408 /* Indices for target_mcontext.mc_gregs, below.
4409 See arch/powerpc/include/asm/ptrace.h for details. */
4410 enum {
4411 TARGET_PT_R0 = 0,
4412 TARGET_PT_R1 = 1,
4413 TARGET_PT_R2 = 2,
4414 TARGET_PT_R3 = 3,
4415 TARGET_PT_R4 = 4,
4416 TARGET_PT_R5 = 5,
4417 TARGET_PT_R6 = 6,
4418 TARGET_PT_R7 = 7,
4419 TARGET_PT_R8 = 8,
4420 TARGET_PT_R9 = 9,
4421 TARGET_PT_R10 = 10,
4422 TARGET_PT_R11 = 11,
4423 TARGET_PT_R12 = 12,
4424 TARGET_PT_R13 = 13,
4425 TARGET_PT_R14 = 14,
4426 TARGET_PT_R15 = 15,
4427 TARGET_PT_R16 = 16,
4428 TARGET_PT_R17 = 17,
4429 TARGET_PT_R18 = 18,
4430 TARGET_PT_R19 = 19,
4431 TARGET_PT_R20 = 20,
4432 TARGET_PT_R21 = 21,
4433 TARGET_PT_R22 = 22,
4434 TARGET_PT_R23 = 23,
4435 TARGET_PT_R24 = 24,
4436 TARGET_PT_R25 = 25,
4437 TARGET_PT_R26 = 26,
4438 TARGET_PT_R27 = 27,
4439 TARGET_PT_R28 = 28,
4440 TARGET_PT_R29 = 29,
4441 TARGET_PT_R30 = 30,
4442 TARGET_PT_R31 = 31,
4443 TARGET_PT_NIP = 32,
4444 TARGET_PT_MSR = 33,
4445 TARGET_PT_ORIG_R3 = 34,
4446 TARGET_PT_CTR = 35,
4447 TARGET_PT_LNK = 36,
4448 TARGET_PT_XER = 37,
4449 TARGET_PT_CCR = 38,
4450 /* Yes, there are two registers with #39. One is 64-bit only. */
4451 TARGET_PT_MQ = 39,
4452 TARGET_PT_SOFTE = 39,
4453 TARGET_PT_TRAP = 40,
4454 TARGET_PT_DAR = 41,
4455 TARGET_PT_DSISR = 42,
4456 TARGET_PT_RESULT = 43,
4457 TARGET_PT_REGS_COUNT = 44
4458 };
4459
4460 /* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC;
4461 on 64-bit PPC, sigcontext and mcontext are one and the same. */
4462 struct target_mcontext {
4463 target_ulong mc_gregs[48];
4464 /* Includes fpscr. */
4465 uint64_t mc_fregs[33];
4466 target_ulong mc_pad[2];
4467 /* We need to handle Altivec and SPE at the same time, which no
4468 kernel needs to do. Fortunately, the kernel defines this bit to
4469 be Altivec-register-large all the time, rather than trying to
4470 twiddle it based on the specific platform. */
4471 union {
4472 /* SPE vector registers. One extra for SPEFSCR. */
4473 uint32_t spe[33];
4474 /* Altivec vector registers. The packing of VSCR and VRSAVE
4475 varies depending on whether we're PPC64 or not: PPC64 splits
4476 them apart; PPC32 stuffs them together. */
4477 #if defined(TARGET_PPC64)
4478 #define QEMU_NVRREG 34
4479 #else
4480 #define QEMU_NVRREG 33
4481 #endif
4482 ppc_avr_t altivec[QEMU_NVRREG];
4483 #undef QEMU_NVRREG
4484 } mc_vregs __attribute__((__aligned__(16)));
4485 };
4486
4487 struct target_ucontext {
4488 target_ulong tuc_flags;
4489 target_ulong tuc_link; /* struct ucontext __user * */
4490 struct target_sigaltstack tuc_stack;
4491 #if !defined(TARGET_PPC64)
4492 int32_t tuc_pad[7];
4493 target_ulong tuc_regs; /* struct mcontext __user *
4494 points to uc_mcontext field */
4495 #endif
4496 target_sigset_t tuc_sigmask;
4497 #if defined(TARGET_PPC64)
4498 target_sigset_t unused[15]; /* Allow for uc_sigmask growth */
4499 struct target_sigcontext tuc_mcontext;
4500 #else
4501 int32_t tuc_maskext[30];
4502 int32_t tuc_pad2[3];
4503 struct target_mcontext tuc_mcontext;
4504 #endif
4505 };
4506
4507 /* See arch/powerpc/kernel/signal_32.c. */
4508 struct target_sigframe {
4509 struct target_sigcontext sctx;
4510 struct target_mcontext mctx;
4511 int32_t abigap[56];
4512 };
4513
4514 struct target_rt_sigframe {
4515 struct target_siginfo info;
4516 struct target_ucontext uc;
4517 int32_t abigap[56];
4518 };
4519
4520 /* We use the mc_pad field for the signal return trampoline. */
4521 #define tramp mc_pad
4522
4523 /* See arch/powerpc/kernel/signal.c. */
4524 static target_ulong get_sigframe(struct target_sigaction *ka,
4525 CPUPPCState *env,
4526 int frame_size)
4527 {
4528 target_ulong oldsp, newsp;
4529
4530 oldsp = env->gpr[1];
4531
4532 if ((ka->sa_flags & TARGET_SA_ONSTACK) &&
4533 (sas_ss_flags(oldsp) == 0)) {
4534 oldsp = (target_sigaltstack_used.ss_sp
4535 + target_sigaltstack_used.ss_size);
4536 }
4537
4538 newsp = (oldsp - frame_size) & ~0xFUL;
4539
4540 return newsp;
4541 }
4542
4543 static int save_user_regs(CPUPPCState *env, struct target_mcontext *frame,
4544 int sigret)
4545 {
4546 target_ulong msr = env->msr;
4547 int i;
4548 target_ulong ccr = 0;
4549
4550 /* In general, the kernel attempts to be intelligent about what it
4551 needs to save for Altivec/FP/SPE registers. We don't care that
4552 much, so we just go ahead and save everything. */
4553
4554 /* Save general registers. */
4555 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4556 if (__put_user(env->gpr[i], &frame->mc_gregs[i])) {
4557 return 1;
4558 }
4559 }
4560 if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
4561 || __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
4562 || __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
4563 || __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
4564 return 1;
4565
4566 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
4567 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
4568 }
4569 if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
4570 return 1;
4571
4572 /* Save Altivec registers if necessary. */
4573 if (env->insns_flags & PPC_ALTIVEC) {
4574 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
4575 ppc_avr_t *avr = &env->avr[i];
4576 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
4577
4578 if (__put_user(avr->u64[0], &vreg->u64[0]) ||
4579 __put_user(avr->u64[1], &vreg->u64[1])) {
4580 return 1;
4581 }
4582 }
4583 /* Set MSR_VR in the saved MSR value to indicate that
4584 frame->mc_vregs contains valid data. */
4585 msr |= MSR_VR;
4586 if (__put_user((uint32_t)env->spr[SPR_VRSAVE],
4587 &frame->mc_vregs.altivec[32].u32[3]))
4588 return 1;
4589 }
4590
4591 /* Save floating point registers. */
4592 if (env->insns_flags & PPC_FLOAT) {
4593 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
4594 if (__put_user(env->fpr[i], &frame->mc_fregs[i])) {
4595 return 1;
4596 }
4597 }
4598 if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32]))
4599 return 1;
4600 }
4601
4602 /* Save SPE registers. The kernel only saves the high half. */
4603 if (env->insns_flags & PPC_SPE) {
4604 #if defined(TARGET_PPC64)
4605 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4606 if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) {
4607 return 1;
4608 }
4609 }
4610 #else
4611 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
4612 if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
4613 return 1;
4614 }
4615 }
4616 #endif
4617 /* Set MSR_SPE in the saved MSR value to indicate that
4618 frame->mc_vregs contains valid data. */
4619 msr |= MSR_SPE;
4620 if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
4621 return 1;
4622 }
4623
4624 /* Store MSR. */
4625 if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
4626 return 1;
4627
4628 /* Set up the sigreturn trampoline: li r0,sigret; sc. */
4629 if (sigret) {
4630 if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) ||
4631 __put_user(0x44000002UL, &frame->tramp[1])) {
4632 return 1;
4633 }
4634 }
4635
4636 return 0;
4637 }
4638
4639 static int restore_user_regs(CPUPPCState *env,
4640 struct target_mcontext *frame, int sig)
4641 {
4642 target_ulong save_r2 = 0;
4643 target_ulong msr;
4644 target_ulong ccr;
4645
4646 int i;
4647
4648 if (!sig) {
4649 save_r2 = env->gpr[2];
4650 }
4651
4652 /* Restore general registers. */
4653 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4654 if (__get_user(env->gpr[i], &frame->mc_gregs[i])) {
4655 return 1;
4656 }
4657 }
4658 if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
4659 || __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR])
4660 || __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK])
4661 || __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]))
4662 return 1;
4663 if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
4664 return 1;
4665
4666 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
4667 env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf;
4668 }
4669
4670 if (!sig) {
4671 env->gpr[2] = save_r2;
4672 }
4673 /* Restore MSR. */
4674 if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
4675 return 1;
4676
4677 /* If doing signal return, restore the previous little-endian mode. */
4678 if (sig)
4679 env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE);
4680
4681 /* Restore Altivec registers if necessary. */
4682 if (env->insns_flags & PPC_ALTIVEC) {
4683 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
4684 ppc_avr_t *avr = &env->avr[i];
4685 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
4686
4687 if (__get_user(avr->u64[0], &vreg->u64[0]) ||
4688 __get_user(avr->u64[1], &vreg->u64[1])) {
4689 return 1;
4690 }
4691 }
4692 /* Set MSR_VEC in the saved MSR value to indicate that
4693 frame->mc_vregs contains valid data. */
4694 if (__get_user(env->spr[SPR_VRSAVE],
4695 (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3])))
4696 return 1;
4697 }
4698
4699 /* Restore floating point registers. */
4700 if (env->insns_flags & PPC_FLOAT) {
4701 uint64_t fpscr;
4702 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
4703 if (__get_user(env->fpr[i], &frame->mc_fregs[i])) {
4704 return 1;
4705 }
4706 }
4707 if (__get_user(fpscr, &frame->mc_fregs[32]))
4708 return 1;
4709 env->fpscr = (uint32_t) fpscr;
4710 }
4711
4712 /* Save SPE registers. The kernel only saves the high half. */
4713 if (env->insns_flags & PPC_SPE) {
4714 #if defined(TARGET_PPC64)
4715 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4716 uint32_t hi;
4717
4718 if (__get_user(hi, &frame->mc_vregs.spe[i])) {
4719 return 1;
4720 }
4721 env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
4722 }
4723 #else
4724 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
4725 if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
4726 return 1;
4727 }
4728 }
4729 #endif
4730 if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32]))
4731 return 1;
4732 }
4733
4734 return 0;
4735 }
4736
4737 static void setup_frame(int sig, struct target_sigaction *ka,
4738 target_sigset_t *set, CPUPPCState *env)
4739 {
4740 struct target_sigframe *frame;
4741 struct target_sigcontext *sc;
4742 target_ulong frame_addr, newsp;
4743 int err = 0;
4744 int signal;
4745
4746 frame_addr = get_sigframe(ka, env, sizeof(*frame));
4747 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
4748 goto sigsegv;
4749 sc = &frame->sctx;
4750
4751 signal = current_exec_domain_sig(sig);
4752
4753 err |= __put_user(ka->_sa_handler, &sc->handler);
4754 err |= __put_user(set->sig[0], &sc->oldmask);
4755 #if defined(TARGET_PPC64)
4756 err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]);
4757 #else
4758 err |= __put_user(set->sig[1], &sc->_unused[3]);
4759 #endif
4760 err |= __put_user(h2g(&frame->mctx), &sc->regs);
4761 err |= __put_user(sig, &sc->signal);
4762
4763 /* Save user regs. */
4764 err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn);
4765
4766 /* The kernel checks for the presence of a VDSO here. We don't
4767 emulate a vdso, so use a sigreturn system call. */
4768 env->lr = (target_ulong) h2g(frame->mctx.tramp);
4769
4770 /* Turn off all fp exceptions. */
4771 env->fpscr = 0;
4772
4773 /* Create a stack frame for the caller of the handler. */
4774 newsp = frame_addr - SIGNAL_FRAMESIZE;
4775 err |= put_user(env->gpr[1], newsp, target_ulong);
4776
4777 if (err)
4778 goto sigsegv;
4779
4780 /* Set up registers for signal handler. */
4781 env->gpr[1] = newsp;
4782 env->gpr[3] = signal;
4783 env->gpr[4] = frame_addr + offsetof(struct target_sigframe, sctx);
4784 env->nip = (target_ulong) ka->_sa_handler;
4785 /* Signal handlers are entered in big-endian mode. */
4786 env->msr &= ~MSR_LE;
4787
4788 unlock_user_struct(frame, frame_addr, 1);
4789 return;
4790
4791 sigsegv:
4792 unlock_user_struct(frame, frame_addr, 1);
4793 qemu_log("segfaulting from setup_frame\n");
4794 force_sig(TARGET_SIGSEGV);
4795 }
4796
4797 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4798 target_siginfo_t *info,
4799 target_sigset_t *set, CPUPPCState *env)
4800 {
4801 struct target_rt_sigframe *rt_sf;
4802 struct target_mcontext *frame;
4803 target_ulong rt_sf_addr, newsp = 0;
4804 int i, err = 0;
4805 int signal;
4806
4807 rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
4808 if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1))
4809 goto sigsegv;
4810
4811 signal = current_exec_domain_sig(sig);
4812
4813 err |= copy_siginfo_to_user(&rt_sf->info, info);
4814
4815 err |= __put_user(0, &rt_sf->uc.tuc_flags);
4816 err |= __put_user(0, &rt_sf->uc.tuc_link);
4817 err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp,
4818 &rt_sf->uc.tuc_stack.ss_sp);
4819 err |= __put_user(sas_ss_flags(env->gpr[1]),
4820 &rt_sf->uc.tuc_stack.ss_flags);
4821 err |= __put_user(target_sigaltstack_used.ss_size,
4822 &rt_sf->uc.tuc_stack.ss_size);
4823 err |= __put_user(h2g (&rt_sf->uc.tuc_mcontext),
4824 &rt_sf->uc.tuc_regs);
4825 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
4826 err |= __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]);
4827 }
4828
4829 frame = &rt_sf->uc.tuc_mcontext;
4830 err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn);
4831
4832 /* The kernel checks for the presence of a VDSO here. We don't
4833 emulate a vdso, so use a sigreturn system call. */
4834 env->lr = (target_ulong) h2g(frame->tramp);
4835
4836 /* Turn off all fp exceptions. */
4837 env->fpscr = 0;
4838
4839 /* Create a stack frame for the caller of the handler. */
4840 newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
4841 err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
4842
4843 if (err)
4844 goto sigsegv;
4845
4846 /* Set up registers for signal handler. */
4847 env->gpr[1] = newsp;
4848 env->gpr[3] = (target_ulong) signal;
4849 env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
4850 env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
4851 env->gpr[6] = (target_ulong) h2g(rt_sf);
4852 env->nip = (target_ulong) ka->_sa_handler;
4853 /* Signal handlers are entered in big-endian mode. */
4854 env->msr &= ~MSR_LE;
4855
4856 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4857 return;
4858
4859 sigsegv:
4860 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4861 qemu_log("segfaulting from setup_rt_frame\n");
4862 force_sig(TARGET_SIGSEGV);
4863
4864 }
4865
4866 long do_sigreturn(CPUPPCState *env)
4867 {
4868 struct target_sigcontext *sc = NULL;
4869 struct target_mcontext *sr = NULL;
4870 target_ulong sr_addr = 0, sc_addr;
4871 sigset_t blocked;
4872 target_sigset_t set;
4873
4874 sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
4875 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1))
4876 goto sigsegv;
4877
4878 #if defined(TARGET_PPC64)
4879 set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32);
4880 #else
4881 if(__get_user(set.sig[0], &sc->oldmask) ||
4882 __get_user(set.sig[1], &sc->_unused[3]))
4883 goto sigsegv;
4884 #endif
4885 target_to_host_sigset_internal(&blocked, &set);
4886 sigprocmask(SIG_SETMASK, &blocked, NULL);
4887
4888 if (__get_user(sr_addr, &sc->regs))
4889 goto sigsegv;
4890 if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1))
4891 goto sigsegv;
4892 if (restore_user_regs(env, sr, 1))
4893 goto sigsegv;
4894
4895 unlock_user_struct(sr, sr_addr, 1);
4896 unlock_user_struct(sc, sc_addr, 1);
4897 return -TARGET_QEMU_ESIGRETURN;
4898
4899 sigsegv:
4900 unlock_user_struct(sr, sr_addr, 1);
4901 unlock_user_struct(sc, sc_addr, 1);
4902 qemu_log("segfaulting from do_sigreturn\n");
4903 force_sig(TARGET_SIGSEGV);
4904 return 0;
4905 }
4906
4907 /* See arch/powerpc/kernel/signal_32.c. */
4908 static int do_setcontext(struct target_ucontext *ucp, CPUPPCState *env, int sig)
4909 {
4910 struct target_mcontext *mcp;
4911 target_ulong mcp_addr;
4912 sigset_t blocked;
4913 target_sigset_t set;
4914
4915 if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask),
4916 sizeof (set)))
4917 return 1;
4918
4919 #if defined(TARGET_PPC64)
4920 fprintf (stderr, "do_setcontext: not implemented\n");
4921 return 0;
4922 #else
4923 if (__get_user(mcp_addr, &ucp->tuc_regs))
4924 return 1;
4925
4926 if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1))
4927 return 1;
4928
4929 target_to_host_sigset_internal(&blocked, &set);
4930 sigprocmask(SIG_SETMASK, &blocked, NULL);
4931 if (restore_user_regs(env, mcp, sig))
4932 goto sigsegv;
4933
4934 unlock_user_struct(mcp, mcp_addr, 1);
4935 return 0;
4936
4937 sigsegv:
4938 unlock_user_struct(mcp, mcp_addr, 1);
4939 return 1;
4940 #endif
4941 }
4942
4943 long do_rt_sigreturn(CPUPPCState *env)
4944 {
4945 struct target_rt_sigframe *rt_sf = NULL;
4946 target_ulong rt_sf_addr;
4947
4948 rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16;
4949 if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1))
4950 goto sigsegv;
4951
4952 if (do_setcontext(&rt_sf->uc, env, 1))
4953 goto sigsegv;
4954
4955 do_sigaltstack(rt_sf_addr
4956 + offsetof(struct target_rt_sigframe, uc.tuc_stack),
4957 0, env->gpr[1]);
4958
4959 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4960 return -TARGET_QEMU_ESIGRETURN;
4961
4962 sigsegv:
4963 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4964 qemu_log("segfaulting from do_rt_sigreturn\n");
4965 force_sig(TARGET_SIGSEGV);
4966 return 0;
4967 }
4968
4969 #elif defined(TARGET_M68K)
4970
4971 struct target_sigcontext {
4972 abi_ulong sc_mask;
4973 abi_ulong sc_usp;
4974 abi_ulong sc_d0;
4975 abi_ulong sc_d1;
4976 abi_ulong sc_a0;
4977 abi_ulong sc_a1;
4978 unsigned short sc_sr;
4979 abi_ulong sc_pc;
4980 };
4981
4982 struct target_sigframe
4983 {
4984 abi_ulong pretcode;
4985 int sig;
4986 int code;
4987 abi_ulong psc;
4988 char retcode[8];
4989 abi_ulong extramask[TARGET_NSIG_WORDS-1];
4990 struct target_sigcontext sc;
4991 };
4992
4993 typedef int target_greg_t;
4994 #define TARGET_NGREG 18
4995 typedef target_greg_t target_gregset_t[TARGET_NGREG];
4996
4997 typedef struct target_fpregset {
4998 int f_fpcntl[3];
4999 int f_fpregs[8*3];
5000 } target_fpregset_t;
5001
5002 struct target_mcontext {
5003 int version;
5004 target_gregset_t gregs;
5005 target_fpregset_t fpregs;
5006 };
5007
5008 #define TARGET_MCONTEXT_VERSION 2
5009
5010 struct target_ucontext {
5011 abi_ulong tuc_flags;
5012 abi_ulong tuc_link;
5013 target_stack_t tuc_stack;
5014 struct target_mcontext tuc_mcontext;
5015 abi_long tuc_filler[80];
5016 target_sigset_t tuc_sigmask;
5017 };
5018
5019 struct target_rt_sigframe
5020 {
5021 abi_ulong pretcode;
5022 int sig;
5023 abi_ulong pinfo;
5024 abi_ulong puc;
5025 char retcode[8];
5026 struct target_siginfo info;
5027 struct target_ucontext uc;
5028 };
5029
5030 static int
5031 setup_sigcontext(struct target_sigcontext *sc, CPUM68KState *env,
5032 abi_ulong mask)
5033 {
5034 int err = 0;
5035
5036 err |= __put_user(mask, &sc->sc_mask);
5037 err |= __put_user(env->aregs[7], &sc->sc_usp);
5038 err |= __put_user(env->dregs[0], &sc->sc_d0);
5039 err |= __put_user(env->dregs[1], &sc->sc_d1);
5040 err |= __put_user(env->aregs[0], &sc->sc_a0);
5041 err |= __put_user(env->aregs[1], &sc->sc_a1);
5042 err |= __put_user(env->sr, &sc->sc_sr);
5043 err |= __put_user(env->pc, &sc->sc_pc);
5044
5045 return err;
5046 }
5047
5048 static int
5049 restore_sigcontext(CPUM68KState *env, struct target_sigcontext *sc, int *pd0)
5050 {
5051 int err = 0;
5052 int temp;
5053
5054 err |= __get_user(env->aregs[7], &sc->sc_usp);
5055 err |= __get_user(env->dregs[1], &sc->sc_d1);
5056 err |= __get_user(env->aregs[0], &sc->sc_a0);
5057 err |= __get_user(env->aregs[1], &sc->sc_a1);
5058 err |= __get_user(env->pc, &sc->sc_pc);
5059 err |= __get_user(temp, &sc->sc_sr);
5060 env->sr = (env->sr & 0xff00) | (temp & 0xff);
5061
5062 *pd0 = tswapl(sc->sc_d0);
5063
5064 return err;
5065 }
5066
5067 /*
5068 * Determine which stack to use..
5069 */
5070 static inline abi_ulong
5071 get_sigframe(struct target_sigaction *ka, CPUM68KState *regs,
5072 size_t frame_size)
5073 {
5074 unsigned long sp;
5075
5076 sp = regs->aregs[7];
5077
5078 /* This is the X/Open sanctioned signal stack switching. */
5079 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
5080 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
5081 }
5082
5083 return ((sp - frame_size) & -8UL);
5084 }
5085
5086 static void setup_frame(int sig, struct target_sigaction *ka,
5087 target_sigset_t *set, CPUM68KState *env)
5088 {
5089 struct target_sigframe *frame;
5090 abi_ulong frame_addr;
5091 abi_ulong retcode_addr;
5092 abi_ulong sc_addr;
5093 int err = 0;
5094 int i;
5095
5096 frame_addr = get_sigframe(ka, env, sizeof *frame);
5097 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
5098 goto give_sigsegv;
5099
5100 err |= __put_user(sig, &frame->sig);
5101
5102 sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
5103 err |= __put_user(sc_addr, &frame->psc);
5104
5105 err |= setup_sigcontext(&frame->sc, env, set->sig[0]);
5106 if (err)
5107 goto give_sigsegv;
5108
5109 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
5110 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
5111 goto give_sigsegv;
5112 }
5113
5114 /* Set up to return from userspace. */
5115
5116 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
5117 err |= __put_user(retcode_addr, &frame->pretcode);
5118
5119 /* moveq #,d0; trap #0 */
5120
5121 err |= __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16),
5122 (long *)(frame->retcode));
5123
5124 if (err)
5125 goto give_sigsegv;
5126
5127 /* Set up to return from userspace */
5128
5129 env->aregs[7] = frame_addr;
5130 env->pc = ka->_sa_handler;
5131
5132 unlock_user_struct(frame, frame_addr, 1);
5133 return;
5134
5135 give_sigsegv:
5136 unlock_user_struct(frame, frame_addr, 1);
5137 force_sig(TARGET_SIGSEGV);
5138 }
5139
5140 static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
5141 CPUM68KState *env)
5142 {
5143 target_greg_t *gregs = uc->tuc_mcontext.gregs;
5144 int err;
5145
5146 err = __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version);
5147 err |= __put_user(env->dregs[0], &gregs[0]);
5148 err |= __put_user(env->dregs[1], &gregs[1]);
5149 err |= __put_user(env->dregs[2], &gregs[2]);
5150 err |= __put_user(env->dregs[3], &gregs[3]);
5151 err |= __put_user(env->dregs[4], &gregs[4]);
5152 err |= __put_user(env->dregs[5], &gregs[5]);
5153 err |= __put_user(env->dregs[6], &gregs[6]);
5154 err |= __put_user(env->dregs[7], &gregs[7]);
5155 err |= __put_user(env->aregs[0], &gregs[8]);
5156 err |= __put_user(env->aregs[1], &gregs[9]);
5157 err |= __put_user(env->aregs[2], &gregs[10]);
5158 err |= __put_user(env->aregs[3], &gregs[11]);
5159 err |= __put_user(env->aregs[4], &gregs[12]);
5160 err |= __put_user(env->aregs[5], &gregs[13]);
5161 err |= __put_user(env->aregs[6], &gregs[14]);
5162 err |= __put_user(env->aregs[7], &gregs[15]);
5163 err |= __put_user(env->pc, &gregs[16]);
5164 err |= __put_user(env->sr, &gregs[17]);
5165
5166 return err;
5167 }
5168
5169 static inline int target_rt_restore_ucontext(CPUM68KState *env,
5170 struct target_ucontext *uc,
5171 int *pd0)
5172 {
5173 int temp;
5174 int err;
5175 target_greg_t *gregs = uc->tuc_mcontext.gregs;
5176
5177 err = __get_user(temp, &uc->tuc_mcontext.version);
5178 if (temp != TARGET_MCONTEXT_VERSION)
5179 goto badframe;
5180
5181 /* restore passed registers */
5182 err |= __get_user(env->dregs[0], &gregs[0]);
5183 err |= __get_user(env->dregs[1], &gregs[1]);
5184 err |= __get_user(env->dregs[2], &gregs[2]);
5185 err |= __get_user(env->dregs[3], &gregs[3]);
5186 err |= __get_user(env->dregs[4], &gregs[4]);
5187 err |= __get_user(env->dregs[5], &gregs[5]);
5188 err |= __get_user(env->dregs[6], &gregs[6]);
5189 err |= __get_user(env->dregs[7], &gregs[7]);
5190 err |= __get_user(env->aregs[0], &gregs[8]);
5191 err |= __get_user(env->aregs[1], &gregs[9]);
5192 err |= __get_user(env->aregs[2], &gregs[10]);
5193 err |= __get_user(env->aregs[3], &gregs[11]);
5194 err |= __get_user(env->aregs[4], &gregs[12]);
5195 err |= __get_user(env->aregs[5], &gregs[13]);
5196 err |= __get_user(env->aregs[6], &gregs[14]);
5197 err |= __get_user(env->aregs[7], &gregs[15]);
5198 err |= __get_user(env->pc, &gregs[16]);
5199 err |= __get_user(temp, &gregs[17]);
5200 env->sr = (env->sr & 0xff00) | (temp & 0xff);
5201
5202 *pd0 = env->dregs[0];
5203 return err;
5204
5205 badframe:
5206 return 1;
5207 }
5208
5209 static void setup_rt_frame(int sig, struct target_sigaction *ka,
5210 target_siginfo_t *info,
5211 target_sigset_t *set, CPUM68KState *env)
5212 {
5213 struct target_rt_sigframe *frame;
5214 abi_ulong frame_addr;
5215 abi_ulong retcode_addr;
5216 abi_ulong info_addr;
5217 abi_ulong uc_addr;
5218 int err = 0;
5219 int i;
5220
5221 frame_addr = get_sigframe(ka, env, sizeof *frame);
5222 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
5223 goto give_sigsegv;
5224
5225 err |= __put_user(sig, &frame->sig);
5226
5227 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
5228 err |= __put_user(info_addr, &frame->pinfo);
5229
5230 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
5231 err |= __put_user(uc_addr, &frame->puc);
5232
5233 err |= copy_siginfo_to_user(&frame->info, info);
5234
5235 /* Create the ucontext */
5236
5237 err |= __put_user(0, &frame->uc.tuc_flags);
5238 err |= __put_user(0, &frame->uc.tuc_link);
5239 err |= __put_user(target_sigaltstack_used.ss_sp,
5240 &frame->uc.tuc_stack.ss_sp);
5241 err |= __put_user(sas_ss_flags(env->aregs[7]),
5242 &frame->uc.tuc_stack.ss_flags);
5243 err |= __put_user(target_sigaltstack_used.ss_size,
5244 &frame->uc.tuc_stack.ss_size);
5245 err |= target_rt_setup_ucontext(&frame->uc, env);
5246
5247 if (err)
5248 goto give_sigsegv;
5249
5250 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
5251 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
5252 goto give_sigsegv;
5253 }
5254
5255 /* Set up to return from userspace. */
5256
5257 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
5258 err |= __put_user(retcode_addr, &frame->pretcode);
5259
5260 /* moveq #,d0; notb d0; trap #0 */
5261
5262 err |= __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
5263 (long *)(frame->retcode + 0));
5264 err |= __put_user(0x4e40, (short *)(frame->retcode + 4));
5265
5266 if (err)
5267 goto give_sigsegv;
5268
5269 /* Set up to return from userspace */
5270
5271 env->aregs[7] = frame_addr;
5272 env->pc = ka->_sa_handler;
5273
5274 unlock_user_struct(frame, frame_addr, 1);
5275 return;
5276
5277 give_sigsegv:
5278 unlock_user_struct(frame, frame_addr, 1);
5279 force_sig(TARGET_SIGSEGV);
5280 }
5281
5282 long do_sigreturn(CPUM68KState *env)
5283 {
5284 struct target_sigframe *frame;
5285 abi_ulong frame_addr = env->aregs[7] - 4;
5286 target_sigset_t target_set;
5287 sigset_t set;
5288 int d0, i;
5289
5290 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
5291 goto badframe;
5292
5293 /* set blocked signals */
5294
5295 if (__get_user(target_set.sig[0], &frame->sc.sc_mask))
5296 goto badframe;
5297
5298 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
5299 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
5300 goto badframe;
5301 }
5302
5303 target_to_host_sigset_internal(&set, &target_set);
5304 sigprocmask(SIG_SETMASK, &set, NULL);
5305
5306 /* restore registers */
5307
5308 if (restore_sigcontext(env, &frame->sc, &d0))
5309 goto badframe;
5310
5311 unlock_user_struct(frame, frame_addr, 0);
5312 return d0;
5313
5314 badframe:
5315 unlock_user_struct(frame, frame_addr, 0);
5316 force_sig(TARGET_SIGSEGV);
5317 return 0;
5318 }
5319
5320 long do_rt_sigreturn(CPUM68KState *env)
5321 {
5322 struct target_rt_sigframe *frame;
5323 abi_ulong frame_addr = env->aregs[7] - 4;
5324 target_sigset_t target_set;
5325 sigset_t set;
5326 int d0;
5327
5328 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
5329 goto badframe;
5330
5331 target_to_host_sigset_internal(&set, &target_set);
5332 sigprocmask(SIG_SETMASK, &set, NULL);
5333
5334 /* restore registers */
5335
5336 if (target_rt_restore_ucontext(env, &frame->uc, &d0))
5337 goto badframe;
5338
5339 if (do_sigaltstack(frame_addr +
5340 offsetof(struct target_rt_sigframe, uc.tuc_stack),
5341 0, get_sp_from_cpustate(env)) == -EFAULT)
5342 goto badframe;
5343
5344 unlock_user_struct(frame, frame_addr, 0);
5345 return d0;
5346
5347 badframe:
5348 unlock_user_struct(frame, frame_addr, 0);
5349 force_sig(TARGET_SIGSEGV);
5350 return 0;
5351 }
5352
5353 #elif defined(TARGET_ALPHA)
5354
5355 struct target_sigcontext {
5356 abi_long sc_onstack;
5357 abi_long sc_mask;
5358 abi_long sc_pc;
5359 abi_long sc_ps;
5360 abi_long sc_regs[32];
5361 abi_long sc_ownedfp;
5362 abi_long sc_fpregs[32];
5363 abi_ulong sc_fpcr;
5364 abi_ulong sc_fp_control;
5365 abi_ulong sc_reserved1;
5366 abi_ulong sc_reserved2;
5367 abi_ulong sc_ssize;
5368 abi_ulong sc_sbase;
5369 abi_ulong sc_traparg_a0;
5370 abi_ulong sc_traparg_a1;
5371 abi_ulong sc_traparg_a2;
5372 abi_ulong sc_fp_trap_pc;
5373 abi_ulong sc_fp_trigger_sum;
5374 abi_ulong sc_fp_trigger_inst;
5375 };
5376
5377 struct target_ucontext {
5378 abi_ulong tuc_flags;
5379 abi_ulong tuc_link;
5380 abi_ulong tuc_osf_sigmask;
5381 target_stack_t tuc_stack;
5382 struct target_sigcontext tuc_mcontext;
5383 target_sigset_t tuc_sigmask;
5384 };
5385
5386 struct target_sigframe {
5387 struct target_sigcontext sc;
5388 unsigned int retcode[3];
5389 };
5390
5391 struct target_rt_sigframe {
5392 target_siginfo_t info;
5393 struct target_ucontext uc;
5394 unsigned int retcode[3];
5395 };
5396
5397 #define INSN_MOV_R30_R16 0x47fe0410
5398 #define INSN_LDI_R0 0x201f0000
5399 #define INSN_CALLSYS 0x00000083
5400
5401 static int setup_sigcontext(struct target_sigcontext *sc, CPUAlphaState *env,
5402 abi_ulong frame_addr, target_sigset_t *set)
5403 {
5404 int i, err = 0;
5405
5406 err |= __put_user(on_sig_stack(frame_addr), &sc->sc_onstack);
5407 err |= __put_user(set->sig[0], &sc->sc_mask);
5408 err |= __put_user(env->pc, &sc->sc_pc);
5409 err |= __put_user(8, &sc->sc_ps);
5410
5411 for (i = 0; i < 31; ++i) {
5412 err |= __put_user(env->ir[i], &sc->sc_regs[i]);
5413 }
5414 err |= __put_user(0, &sc->sc_regs[31]);
5415
5416 for (i = 0; i < 31; ++i) {
5417 err |= __put_user(env->fir[i], &sc->sc_fpregs[i]);
5418 }
5419 err |= __put_user(0, &sc->sc_fpregs[31]);
5420 err |= __put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr);
5421
5422 err |= __put_user(0, &sc->sc_traparg_a0); /* FIXME */
5423 err |= __put_user(0, &sc->sc_traparg_a1); /* FIXME */
5424 err |= __put_user(0, &sc->sc_traparg_a2); /* FIXME */
5425
5426 return err;
5427 }
5428
5429 static int restore_sigcontext(CPUAlphaState *env,
5430 struct target_sigcontext *sc)
5431 {
5432 uint64_t fpcr;
5433 int i, err = 0;
5434
5435 err |= __get_user(env->pc, &sc->sc_pc);
5436
5437 for (i = 0; i < 31; ++i) {
5438 err |= __get_user(env->ir[i], &sc->sc_regs[i]);
5439 }
5440 for (i = 0; i < 31; ++i) {
5441 err |= __get_user(env->fir[i], &sc->sc_fpregs[i]);
5442 }
5443
5444 err |= __get_user(fpcr, &sc->sc_fpcr);
5445 cpu_alpha_store_fpcr(env, fpcr);
5446
5447 return err;
5448 }
5449
5450 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
5451 CPUAlphaState *env,
5452 unsigned long framesize)
5453 {
5454 abi_ulong sp = env->ir[IR_SP];
5455
5456 /* This is the X/Open sanctioned signal stack switching. */
5457 if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) {
5458 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
5459 }
5460 return (sp - framesize) & -32;
5461 }
5462
5463 static void setup_frame(int sig, struct target_sigaction *ka,
5464 target_sigset_t *set, CPUAlphaState *env)
5465 {
5466 abi_ulong frame_addr, r26;
5467 struct target_sigframe *frame;
5468 int err = 0;
5469
5470 frame_addr = get_sigframe(ka, env, sizeof(*frame));
5471 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5472 goto give_sigsegv;
5473 }
5474
5475 err |= setup_sigcontext(&frame->sc, env, frame_addr, set);
5476
5477 if (ka->sa_restorer) {
5478 r26 = ka->sa_restorer;
5479 } else {
5480 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
5481 err |= __put_user(INSN_LDI_R0 + TARGET_NR_sigreturn,
5482 &frame->retcode[1]);
5483 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]);
5484 /* imb() */
5485 r26 = frame_addr;
5486 }
5487
5488 unlock_user_struct(frame, frame_addr, 1);
5489
5490 if (err) {
5491 give_sigsegv:
5492 if (sig == TARGET_SIGSEGV) {
5493 ka->_sa_handler = TARGET_SIG_DFL;
5494 }
5495 force_sig(TARGET_SIGSEGV);
5496 }
5497
5498 env->ir[IR_RA] = r26;
5499 env->ir[IR_PV] = env->pc = ka->_sa_handler;
5500 env->ir[IR_A0] = sig;
5501 env->ir[IR_A1] = 0;
5502 env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc);
5503 env->ir[IR_SP] = frame_addr;
5504 }
5505
5506 static void setup_rt_frame(int sig, struct target_sigaction *ka,
5507 target_siginfo_t *info,
5508 target_sigset_t *set, CPUAlphaState *env)
5509 {
5510 abi_ulong frame_addr, r26;
5511 struct target_rt_sigframe *frame;
5512 int i, err = 0;
5513
5514 frame_addr = get_sigframe(ka, env, sizeof(*frame));
5515 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5516 goto give_sigsegv;
5517 }
5518
5519 err |= copy_siginfo_to_user(&frame->info, info);
5520
5521 err |= __put_user(0, &frame->uc.tuc_flags);
5522 err |= __put_user(0, &frame->uc.tuc_link);
5523 err |= __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask);
5524 err |= __put_user(target_sigaltstack_used.ss_sp,
5525 &frame->uc.tuc_stack.ss_sp);
5526 err |= __put_user(sas_ss_flags(env->ir[IR_SP]),
5527 &frame->uc.tuc_stack.ss_flags);
5528 err |= __put_user(target_sigaltstack_used.ss_size,
5529 &frame->uc.tuc_stack.ss_size);
5530 err |= setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set);
5531 for (i = 0; i < TARGET_NSIG_WORDS; ++i) {
5532 err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
5533 }
5534
5535 if (ka->sa_restorer) {
5536 r26 = ka->sa_restorer;
5537 } else {
5538 err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
5539 err |= __put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn,
5540 &frame->retcode[1]);
5541 err |= __put_user(INSN_CALLSYS, &frame->retcode[2]);
5542 /* imb(); */
5543 r26 = frame_addr;
5544 }
5545
5546 if (err) {
5547 give_sigsegv:
5548 if (sig == TARGET_SIGSEGV) {
5549 ka->_sa_handler = TARGET_SIG_DFL;
5550 }
5551 force_sig(TARGET_SIGSEGV);
5552 }
5553
5554 env->ir[IR_RA] = r26;
5555 env->ir[IR_PV] = env->pc = ka->_sa_handler;
5556 env->ir[IR_A0] = sig;
5557 env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info);
5558 env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
5559 env->ir[IR_SP] = frame_addr;
5560 }
5561
5562 long do_sigreturn(CPUAlphaState *env)
5563 {
5564 struct target_sigcontext *sc;
5565 abi_ulong sc_addr = env->ir[IR_A0];
5566 target_sigset_t target_set;
5567 sigset_t set;
5568
5569 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) {
5570 goto badframe;
5571 }
5572
5573 target_sigemptyset(&target_set);
5574 if (__get_user(target_set.sig[0], &sc->sc_mask)) {
5575 goto badframe;
5576 }
5577
5578 target_to_host_sigset_internal(&set, &target_set);
5579 sigprocmask(SIG_SETMASK, &set, NULL);
5580
5581 if (restore_sigcontext(env, sc)) {
5582 goto badframe;
5583 }
5584 unlock_user_struct(sc, sc_addr, 0);
5585 return env->ir[IR_V0];
5586
5587 badframe:
5588 unlock_user_struct(sc, sc_addr, 0);
5589 force_sig(TARGET_SIGSEGV);
5590 }
5591
5592 long do_rt_sigreturn(CPUAlphaState *env)
5593 {
5594 abi_ulong frame_addr = env->ir[IR_A0];
5595 struct target_rt_sigframe *frame;
5596 sigset_t set;
5597
5598 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
5599 goto badframe;
5600 }
5601 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
5602 sigprocmask(SIG_SETMASK, &set, NULL);
5603
5604 if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
5605 goto badframe;
5606 }
5607 if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
5608 uc.tuc_stack),
5609 0, env->ir[IR_SP]) == -EFAULT) {
5610 goto badframe;
5611 }
5612
5613 unlock_user_struct(frame, frame_addr, 0);
5614 return env->ir[IR_V0];
5615
5616
5617 badframe:
5618 unlock_user_struct(frame, frame_addr, 0);
5619 force_sig(TARGET_SIGSEGV);
5620 }
5621
5622 #else
5623
5624 static void setup_frame(int sig, struct target_sigaction *ka,
5625 target_sigset_t *set, CPUArchState *env)
5626 {
5627 fprintf(stderr, "setup_frame: not implemented\n");
5628 }
5629
5630 static void setup_rt_frame(int sig, struct target_sigaction *ka,
5631 target_siginfo_t *info,
5632 target_sigset_t *set, CPUArchState *env)
5633 {
5634 fprintf(stderr, "setup_rt_frame: not implemented\n");
5635 }
5636
5637 long do_sigreturn(CPUArchState *env)
5638 {
5639 fprintf(stderr, "do_sigreturn: not implemented\n");
5640 return -TARGET_ENOSYS;
5641 }
5642
5643 long do_rt_sigreturn(CPUArchState *env)
5644 {
5645 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
5646 return -TARGET_ENOSYS;
5647 }
5648
5649 #endif
5650
5651 void process_pending_signals(CPUArchState *cpu_env)
5652 {
5653 CPUState *cpu = ENV_GET_CPU(cpu_env);
5654 int sig;
5655 abi_ulong handler;
5656 sigset_t set, old_set;
5657 target_sigset_t target_old_set;
5658 struct emulated_sigtable *k;
5659 struct target_sigaction *sa;
5660 struct sigqueue *q;
5661 TaskState *ts = cpu_env->opaque;
5662
5663 if (!ts->signal_pending)
5664 return;
5665
5666 /* FIXME: This is not threadsafe. */
5667 k = ts->sigtab;
5668 for(sig = 1; sig <= TARGET_NSIG; sig++) {
5669 if (k->pending)
5670 goto handle_signal;
5671 k++;
5672 }
5673 /* if no signal is pending, just return */
5674 ts->signal_pending = 0;
5675 return;
5676
5677 handle_signal:
5678 #ifdef DEBUG_SIGNAL
5679 fprintf(stderr, "qemu: process signal %d\n", sig);
5680 #endif
5681 /* dequeue signal */
5682 q = k->first;
5683 k->first = q->next;
5684 if (!k->first)
5685 k->pending = 0;
5686
5687 sig = gdb_handlesig(cpu, sig);
5688 if (!sig) {
5689 sa = NULL;
5690 handler = TARGET_SIG_IGN;
5691 } else {
5692 sa = &sigact_table[sig - 1];
5693 handler = sa->_sa_handler;
5694 }
5695
5696 if (handler == TARGET_SIG_DFL) {
5697 /* default handler : ignore some signal. The other are job control or fatal */
5698 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
5699 kill(getpid(),SIGSTOP);
5700 } else if (sig != TARGET_SIGCHLD &&
5701 sig != TARGET_SIGURG &&
5702 sig != TARGET_SIGWINCH &&
5703 sig != TARGET_SIGCONT) {
5704 force_sig(sig);
5705 }
5706 } else if (handler == TARGET_SIG_IGN) {
5707 /* ignore sig */
5708 } else if (handler == TARGET_SIG_ERR) {
5709 force_sig(sig);
5710 } else {
5711 /* compute the blocked signals during the handler execution */
5712 target_to_host_sigset(&set, &sa->sa_mask);
5713 /* SA_NODEFER indicates that the current signal should not be
5714 blocked during the handler */
5715 if (!(sa->sa_flags & TARGET_SA_NODEFER))
5716 sigaddset(&set, target_to_host_signal(sig));
5717
5718 /* block signals in the handler using Linux */
5719 sigprocmask(SIG_BLOCK, &set, &old_set);
5720 /* save the previous blocked signal state to restore it at the
5721 end of the signal execution (see do_sigreturn) */
5722 host_to_target_sigset_internal(&target_old_set, &old_set);
5723
5724 /* if the CPU is in VM86 mode, we restore the 32 bit values */
5725 #if defined(TARGET_I386) && !defined(TARGET_X86_64)
5726 {
5727 CPUX86State *env = cpu_env;
5728 if (env->eflags & VM_MASK)
5729 save_v86_state(env);
5730 }
5731 #endif
5732 /* prepare the stack frame of the virtual CPU */
5733 #if defined(TARGET_ABI_MIPSN32) || defined(TARGET_ABI_MIPSN64)
5734 /* These targets do not have traditional signals. */
5735 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
5736 #else
5737 if (sa->sa_flags & TARGET_SA_SIGINFO)
5738 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
5739 else
5740 setup_frame(sig, sa, &target_old_set, cpu_env);
5741 #endif
5742 if (sa->sa_flags & TARGET_SA_RESETHAND)
5743 sa->_sa_handler = TARGET_SIG_DFL;
5744 }
5745 if (q != &k->info)
5746 free_sigqueue(cpu_env, q);
5747 }
QEmu