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target-arm: don't hardcode mask values in arm_cpu_handle_mmu_fault
[qemu/qmp-unstable.git] / linux-user / signal.c
blob1141054be2170128d6f7a340b41484b49a255936
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 /* Wrapper for sigprocmask function
201 * Emulates a sigprocmask in a safe way for the guest. Note that set and oldset
202 * are host signal set, not guest ones. This wraps the sigprocmask host calls
203 * that should be protected (calls originated from guest)
204 */
205 int do_sigprocmask(int how, const sigset_t *set, sigset_t *oldset)
206 {
207 int ret;
208 sigset_t val;
209 sigset_t *temp = NULL;
210 CPUState *cpu = thread_cpu;
211 TaskState *ts = (TaskState *)cpu->opaque;
212 bool segv_was_blocked = ts->sigsegv_blocked;
213
214 if (set) {
215 bool has_sigsegv = sigismember(set, SIGSEGV);
216 val = *set;
217 temp = &val;
218
219 sigdelset(temp, SIGSEGV);
220
221 switch (how) {
222 case SIG_BLOCK:
223 if (has_sigsegv) {
224 ts->sigsegv_blocked = true;
225 }
226 break;
227 case SIG_UNBLOCK:
228 if (has_sigsegv) {
229 ts->sigsegv_blocked = false;
230 }
231 break;
232 case SIG_SETMASK:
233 ts->sigsegv_blocked = has_sigsegv;
234 break;
235 default:
236 g_assert_not_reached();
237 }
238 }
239
240 ret = sigprocmask(how, temp, oldset);
241
242 if (oldset && segv_was_blocked) {
243 sigaddset(oldset, SIGSEGV);
244 }
245
246 return ret;
247 }
248
249 /* siginfo conversion */
250
251 static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
252 const siginfo_t *info)
253 {
254 int sig = host_to_target_signal(info->si_signo);
255 tinfo->si_signo = sig;
256 tinfo->si_errno = 0;
257 tinfo->si_code = info->si_code;
258
259 if (sig == TARGET_SIGILL || sig == TARGET_SIGFPE || sig == TARGET_SIGSEGV
260 || sig == TARGET_SIGBUS || sig == TARGET_SIGTRAP) {
261 /* Should never come here, but who knows. The information for
262 the target is irrelevant. */
263 tinfo->_sifields._sigfault._addr = 0;
264 } else if (sig == TARGET_SIGIO) {
265 tinfo->_sifields._sigpoll._band = info->si_band;
266 tinfo->_sifields._sigpoll._fd = info->si_fd;
267 } else if (sig == TARGET_SIGCHLD) {
268 tinfo->_sifields._sigchld._pid = info->si_pid;
269 tinfo->_sifields._sigchld._uid = info->si_uid;
270 tinfo->_sifields._sigchld._status
271 = host_to_target_waitstatus(info->si_status);
272 tinfo->_sifields._sigchld._utime = info->si_utime;
273 tinfo->_sifields._sigchld._stime = info->si_stime;
274 } else if (sig >= TARGET_SIGRTMIN) {
275 tinfo->_sifields._rt._pid = info->si_pid;
276 tinfo->_sifields._rt._uid = info->si_uid;
277 /* XXX: potential problem if 64 bit */
278 tinfo->_sifields._rt._sigval.sival_ptr
279 = (abi_ulong)(unsigned long)info->si_value.sival_ptr;
280 }
281 }
282
283 static void tswap_siginfo(target_siginfo_t *tinfo,
284 const target_siginfo_t *info)
285 {
286 int sig = info->si_signo;
287 tinfo->si_signo = tswap32(sig);
288 tinfo->si_errno = tswap32(info->si_errno);
289 tinfo->si_code = tswap32(info->si_code);
290
291 if (sig == TARGET_SIGILL || sig == TARGET_SIGFPE || sig == TARGET_SIGSEGV
292 || sig == TARGET_SIGBUS || sig == TARGET_SIGTRAP) {
293 tinfo->_sifields._sigfault._addr
294 = tswapal(info->_sifields._sigfault._addr);
295 } else if (sig == TARGET_SIGIO) {
296 tinfo->_sifields._sigpoll._band
297 = tswap32(info->_sifields._sigpoll._band);
298 tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
299 } else if (sig == TARGET_SIGCHLD) {
300 tinfo->_sifields._sigchld._pid
301 = tswap32(info->_sifields._sigchld._pid);
302 tinfo->_sifields._sigchld._uid
303 = tswap32(info->_sifields._sigchld._uid);
304 tinfo->_sifields._sigchld._status
305 = tswap32(info->_sifields._sigchld._status);
306 tinfo->_sifields._sigchld._utime
307 = tswapal(info->_sifields._sigchld._utime);
308 tinfo->_sifields._sigchld._stime
309 = tswapal(info->_sifields._sigchld._stime);
310 } else if (sig >= TARGET_SIGRTMIN) {
311 tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid);
312 tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid);
313 tinfo->_sifields._rt._sigval.sival_ptr
314 = tswapal(info->_sifields._rt._sigval.sival_ptr);
315 }
316 }
317
318
319 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info)
320 {
321 host_to_target_siginfo_noswap(tinfo, info);
322 tswap_siginfo(tinfo, tinfo);
323 }
324
325 /* XXX: we support only POSIX RT signals are used. */
326 /* XXX: find a solution for 64 bit (additional malloced data is needed) */
327 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo)
328 {
329 info->si_signo = tswap32(tinfo->si_signo);
330 info->si_errno = tswap32(tinfo->si_errno);
331 info->si_code = tswap32(tinfo->si_code);
332 info->si_pid = tswap32(tinfo->_sifields._rt._pid);
333 info->si_uid = tswap32(tinfo->_sifields._rt._uid);
334 info->si_value.sival_ptr =
335 (void *)(long)tswapal(tinfo->_sifields._rt._sigval.sival_ptr);
336 }
337
338 static int fatal_signal (int sig)
339 {
340 switch (sig) {
341 case TARGET_SIGCHLD:
342 case TARGET_SIGURG:
343 case TARGET_SIGWINCH:
344 /* Ignored by default. */
345 return 0;
346 case TARGET_SIGCONT:
347 case TARGET_SIGSTOP:
348 case TARGET_SIGTSTP:
349 case TARGET_SIGTTIN:
350 case TARGET_SIGTTOU:
351 /* Job control signals. */
352 return 0;
353 default:
354 return 1;
355 }
356 }
357
358 /* returns 1 if given signal should dump core if not handled */
359 static int core_dump_signal(int sig)
360 {
361 switch (sig) {
362 case TARGET_SIGABRT:
363 case TARGET_SIGFPE:
364 case TARGET_SIGILL:
365 case TARGET_SIGQUIT:
366 case TARGET_SIGSEGV:
367 case TARGET_SIGTRAP:
368 case TARGET_SIGBUS:
369 return (1);
370 default:
371 return (0);
372 }
373 }
374
375 void signal_init(void)
376 {
377 struct sigaction act;
378 struct sigaction oact;
379 int i, j;
380 int host_sig;
381
382 /* generate signal conversion tables */
383 for(i = 1; i < _NSIG; i++) {
384 if (host_to_target_signal_table[i] == 0)
385 host_to_target_signal_table[i] = i;
386 }
387 for(i = 1; i < _NSIG; i++) {
388 j = host_to_target_signal_table[i];
389 target_to_host_signal_table[j] = i;
390 }
391
392 /* set all host signal handlers. ALL signals are blocked during
393 the handlers to serialize them. */
394 memset(sigact_table, 0, sizeof(sigact_table));
395
396 sigfillset(&act.sa_mask);
397 act.sa_flags = SA_SIGINFO;
398 act.sa_sigaction = host_signal_handler;
399 for(i = 1; i <= TARGET_NSIG; i++) {
400 host_sig = target_to_host_signal(i);
401 sigaction(host_sig, NULL, &oact);
402 if (oact.sa_sigaction == (void *)SIG_IGN) {
403 sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
404 } else if (oact.sa_sigaction == (void *)SIG_DFL) {
405 sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
406 }
407 /* If there's already a handler installed then something has
408 gone horribly wrong, so don't even try to handle that case. */
409 /* Install some handlers for our own use. We need at least
410 SIGSEGV and SIGBUS, to detect exceptions. We can not just
411 trap all signals because it affects syscall interrupt
412 behavior. But do trap all default-fatal signals. */
413 if (fatal_signal (i))
414 sigaction(host_sig, &act, NULL);
415 }
416 }
417
418 /* signal queue handling */
419
420 static inline struct sigqueue *alloc_sigqueue(CPUArchState *env)
421 {
422 CPUState *cpu = ENV_GET_CPU(env);
423 TaskState *ts = cpu->opaque;
424 struct sigqueue *q = ts->first_free;
425 if (!q)
426 return NULL;
427 ts->first_free = q->next;
428 return q;
429 }
430
431 static inline void free_sigqueue(CPUArchState *env, struct sigqueue *q)
432 {
433 CPUState *cpu = ENV_GET_CPU(env);
434 TaskState *ts = cpu->opaque;
435
436 q->next = ts->first_free;
437 ts->first_free = q;
438 }
439
440 /* abort execution with signal */
441 static void QEMU_NORETURN force_sig(int target_sig)
442 {
443 CPUState *cpu = thread_cpu;
444 CPUArchState *env = cpu->env_ptr;
445 TaskState *ts = (TaskState *)cpu->opaque;
446 int host_sig, core_dumped = 0;
447 struct sigaction act;
448 host_sig = target_to_host_signal(target_sig);
449 gdb_signalled(env, target_sig);
450
451 /* dump core if supported by target binary format */
452 if (core_dump_signal(target_sig) && (ts->bprm->core_dump != NULL)) {
453 stop_all_tasks();
454 core_dumped =
455 ((*ts->bprm->core_dump)(target_sig, env) == 0);
456 }
457 if (core_dumped) {
458 /* we already dumped the core of target process, we don't want
459 * a coredump of qemu itself */
460 struct rlimit nodump;
461 getrlimit(RLIMIT_CORE, &nodump);
462 nodump.rlim_cur=0;
463 setrlimit(RLIMIT_CORE, &nodump);
464 (void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n",
465 target_sig, strsignal(host_sig), "core dumped" );
466 }
467
468 /* The proper exit code for dying from an uncaught signal is
469 * -<signal>. The kernel doesn't allow exit() or _exit() to pass
470 * a negative value. To get the proper exit code we need to
471 * actually die from an uncaught signal. Here the default signal
472 * handler is installed, we send ourself a signal and we wait for
473 * it to arrive. */
474 sigfillset(&act.sa_mask);
475 act.sa_handler = SIG_DFL;
476 act.sa_flags = 0;
477 sigaction(host_sig, &act, NULL);
478
479 /* For some reason raise(host_sig) doesn't send the signal when
480 * statically linked on x86-64. */
481 kill(getpid(), host_sig);
482
483 /* Make sure the signal isn't masked (just reuse the mask inside
484 of act) */
485 sigdelset(&act.sa_mask, host_sig);
486 sigsuspend(&act.sa_mask);
487
488 /* unreachable */
489 abort();
490 }
491
492 /* queue a signal so that it will be send to the virtual CPU as soon
493 as possible */
494 int queue_signal(CPUArchState *env, int sig, target_siginfo_t *info)
495 {
496 CPUState *cpu = ENV_GET_CPU(env);
497 TaskState *ts = cpu->opaque;
498 struct emulated_sigtable *k;
499 struct sigqueue *q, **pq;
500 abi_ulong handler;
501 int queue;
502
503 #if defined(DEBUG_SIGNAL)
504 fprintf(stderr, "queue_signal: sig=%d\n",
505 sig);
506 #endif
507 k = &ts->sigtab[sig - 1];
508 queue = gdb_queuesig ();
509 handler = sigact_table[sig - 1]._sa_handler;
510
511 if (ts->sigsegv_blocked && sig == TARGET_SIGSEGV) {
512 /* Guest has blocked SIGSEGV but we got one anyway. Assume this
513 * is a forced SIGSEGV (ie one the kernel handles via force_sig_info
514 * because it got a real MMU fault). A blocked SIGSEGV in that
515 * situation is treated as if using the default handler. This is
516 * not correct if some other process has randomly sent us a SIGSEGV
517 * via kill(), but that is not easy to distinguish at this point,
518 * so we assume it doesn't happen.
519 */
520 handler = TARGET_SIG_DFL;
521 }
522
523 if (!queue && handler == TARGET_SIG_DFL) {
524 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
525 kill(getpid(),SIGSTOP);
526 return 0;
527 } else
528 /* default handler : ignore some signal. The other are fatal */
529 if (sig != TARGET_SIGCHLD &&
530 sig != TARGET_SIGURG &&
531 sig != TARGET_SIGWINCH &&
532 sig != TARGET_SIGCONT) {
533 force_sig(sig);
534 } else {
535 return 0; /* indicate ignored */
536 }
537 } else if (!queue && handler == TARGET_SIG_IGN) {
538 /* ignore signal */
539 return 0;
540 } else if (!queue && handler == TARGET_SIG_ERR) {
541 force_sig(sig);
542 } else {
543 pq = &k->first;
544 if (sig < TARGET_SIGRTMIN) {
545 /* if non real time signal, we queue exactly one signal */
546 if (!k->pending)
547 q = &k->info;
548 else
549 return 0;
550 } else {
551 if (!k->pending) {
552 /* first signal */
553 q = &k->info;
554 } else {
555 q = alloc_sigqueue(env);
556 if (!q)
557 return -EAGAIN;
558 while (*pq != NULL)
559 pq = &(*pq)->next;
560 }
561 }
562 *pq = q;
563 q->info = *info;
564 q->next = NULL;
565 k->pending = 1;
566 /* signal that a new signal is pending */
567 ts->signal_pending = 1;
568 return 1; /* indicates that the signal was queued */
569 }
570 }
571
572 static void host_signal_handler(int host_signum, siginfo_t *info,
573 void *puc)
574 {
575 CPUArchState *env = thread_cpu->env_ptr;
576 int sig;
577 target_siginfo_t tinfo;
578
579 /* the CPU emulator uses some host signals to detect exceptions,
580 we forward to it some signals */
581 if ((host_signum == SIGSEGV || host_signum == SIGBUS)
582 && info->si_code > 0) {
583 if (cpu_signal_handler(host_signum, info, puc))
584 return;
585 }
586
587 /* get target signal number */
588 sig = host_to_target_signal(host_signum);
589 if (sig < 1 || sig > TARGET_NSIG)
590 return;
591 #if defined(DEBUG_SIGNAL)
592 fprintf(stderr, "qemu: got signal %d\n", sig);
593 #endif
594 host_to_target_siginfo_noswap(&tinfo, info);
595 if (queue_signal(env, sig, &tinfo) == 1) {
596 /* interrupt the virtual CPU as soon as possible */
597 cpu_exit(thread_cpu);
598 }
599 }
600
601 /* do_sigaltstack() returns target values and errnos. */
602 /* compare linux/kernel/signal.c:do_sigaltstack() */
603 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
604 {
605 int ret;
606 struct target_sigaltstack oss;
607
608 /* XXX: test errors */
609 if(uoss_addr)
610 {
611 __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
612 __put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
613 __put_user(sas_ss_flags(sp), &oss.ss_flags);
614 }
615
616 if(uss_addr)
617 {
618 struct target_sigaltstack *uss;
619 struct target_sigaltstack ss;
620
621 ret = -TARGET_EFAULT;
622 if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)) {
623 goto out;
624 }
625 __get_user(ss.ss_sp, &uss->ss_sp);
626 __get_user(ss.ss_size, &uss->ss_size);
627 __get_user(ss.ss_flags, &uss->ss_flags);
628 unlock_user_struct(uss, uss_addr, 0);
629
630 ret = -TARGET_EPERM;
631 if (on_sig_stack(sp))
632 goto out;
633
634 ret = -TARGET_EINVAL;
635 if (ss.ss_flags != TARGET_SS_DISABLE
636 && ss.ss_flags != TARGET_SS_ONSTACK
637 && ss.ss_flags != 0)
638 goto out;
639
640 if (ss.ss_flags == TARGET_SS_DISABLE) {
641 ss.ss_size = 0;
642 ss.ss_sp = 0;
643 } else {
644 ret = -TARGET_ENOMEM;
645 if (ss.ss_size < MINSIGSTKSZ)
646 goto out;
647 }
648
649 target_sigaltstack_used.ss_sp = ss.ss_sp;
650 target_sigaltstack_used.ss_size = ss.ss_size;
651 }
652
653 if (uoss_addr) {
654 ret = -TARGET_EFAULT;
655 if (copy_to_user(uoss_addr, &oss, sizeof(oss)))
656 goto out;
657 }
658
659 ret = 0;
660 out:
661 return ret;
662 }
663
664 /* do_sigaction() return host values and errnos */
665 int do_sigaction(int sig, const struct target_sigaction *act,
666 struct target_sigaction *oact)
667 {
668 struct target_sigaction *k;
669 struct sigaction act1;
670 int host_sig;
671 int ret = 0;
672
673 if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP)
674 return -EINVAL;
675 k = &sigact_table[sig - 1];
676 #if defined(DEBUG_SIGNAL)
677 fprintf(stderr, "sigaction sig=%d act=0x%p, oact=0x%p\n",
678 sig, act, oact);
679 #endif
680 if (oact) {
681 __put_user(k->_sa_handler, &oact->_sa_handler);
682 __put_user(k->sa_flags, &oact->sa_flags);
683 #if !defined(TARGET_MIPS)
684 __put_user(k->sa_restorer, &oact->sa_restorer);
685 #endif
686 /* Not swapped. */
687 oact->sa_mask = k->sa_mask;
688 }
689 if (act) {
690 /* FIXME: This is not threadsafe. */
691 __get_user(k->_sa_handler, &act->_sa_handler);
692 __get_user(k->sa_flags, &act->sa_flags);
693 #if !defined(TARGET_MIPS)
694 __get_user(k->sa_restorer, &act->sa_restorer);
695 #endif
696 /* To be swapped in target_to_host_sigset. */
697 k->sa_mask = act->sa_mask;
698
699 /* we update the host linux signal state */
700 host_sig = target_to_host_signal(sig);
701 if (host_sig != SIGSEGV && host_sig != SIGBUS) {
702 sigfillset(&act1.sa_mask);
703 act1.sa_flags = SA_SIGINFO;
704 if (k->sa_flags & TARGET_SA_RESTART)
705 act1.sa_flags |= SA_RESTART;
706 /* NOTE: it is important to update the host kernel signal
707 ignore state to avoid getting unexpected interrupted
708 syscalls */
709 if (k->_sa_handler == TARGET_SIG_IGN) {
710 act1.sa_sigaction = (void *)SIG_IGN;
711 } else if (k->_sa_handler == TARGET_SIG_DFL) {
712 if (fatal_signal (sig))
713 act1.sa_sigaction = host_signal_handler;
714 else
715 act1.sa_sigaction = (void *)SIG_DFL;
716 } else {
717 act1.sa_sigaction = host_signal_handler;
718 }
719 ret = sigaction(host_sig, &act1, NULL);
720 }
721 }
722 return ret;
723 }
724
725 static inline void copy_siginfo_to_user(target_siginfo_t *tinfo,
726 const target_siginfo_t *info)
727 {
728 tswap_siginfo(tinfo, info);
729 }
730
731 static inline int current_exec_domain_sig(int sig)
732 {
733 return /* current->exec_domain && current->exec_domain->signal_invmap
734 && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
735 }
736
737 #if defined(TARGET_I386) && TARGET_ABI_BITS == 32
738
739 /* from the Linux kernel */
740
741 struct target_fpreg {
742 uint16_t significand[4];
743 uint16_t exponent;
744 };
745
746 struct target_fpxreg {
747 uint16_t significand[4];
748 uint16_t exponent;
749 uint16_t padding[3];
750 };
751
752 struct target_xmmreg {
753 abi_ulong element[4];
754 };
755
756 struct target_fpstate {
757 /* Regular FPU environment */
758 abi_ulong cw;
759 abi_ulong sw;
760 abi_ulong tag;
761 abi_ulong ipoff;
762 abi_ulong cssel;
763 abi_ulong dataoff;
764 abi_ulong datasel;
765 struct target_fpreg _st[8];
766 uint16_t status;
767 uint16_t magic; /* 0xffff = regular FPU data only */
768
769 /* FXSR FPU environment */
770 abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
771 abi_ulong mxcsr;
772 abi_ulong reserved;
773 struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
774 struct target_xmmreg _xmm[8];
775 abi_ulong padding[56];
776 };
777
778 #define X86_FXSR_MAGIC 0x0000
779
780 struct target_sigcontext {
781 uint16_t gs, __gsh;
782 uint16_t fs, __fsh;
783 uint16_t es, __esh;
784 uint16_t ds, __dsh;
785 abi_ulong edi;
786 abi_ulong esi;
787 abi_ulong ebp;
788 abi_ulong esp;
789 abi_ulong ebx;
790 abi_ulong edx;
791 abi_ulong ecx;
792 abi_ulong eax;
793 abi_ulong trapno;
794 abi_ulong err;
795 abi_ulong eip;
796 uint16_t cs, __csh;
797 abi_ulong eflags;
798 abi_ulong esp_at_signal;
799 uint16_t ss, __ssh;
800 abi_ulong fpstate; /* pointer */
801 abi_ulong oldmask;
802 abi_ulong cr2;
803 };
804
805 struct target_ucontext {
806 abi_ulong tuc_flags;
807 abi_ulong tuc_link;
808 target_stack_t tuc_stack;
809 struct target_sigcontext tuc_mcontext;
810 target_sigset_t tuc_sigmask; /* mask last for extensibility */
811 };
812
813 struct sigframe
814 {
815 abi_ulong pretcode;
816 int sig;
817 struct target_sigcontext sc;
818 struct target_fpstate fpstate;
819 abi_ulong extramask[TARGET_NSIG_WORDS-1];
820 char retcode[8];
821 };
822
823 struct rt_sigframe
824 {
825 abi_ulong pretcode;
826 int sig;
827 abi_ulong pinfo;
828 abi_ulong puc;
829 struct target_siginfo info;
830 struct target_ucontext uc;
831 struct target_fpstate fpstate;
832 char retcode[8];
833 };
834
835 /*
836 * Set up a signal frame.
837 */
838
839 /* XXX: save x87 state */
840 static void setup_sigcontext(struct target_sigcontext *sc,
841 struct target_fpstate *fpstate, CPUX86State *env, abi_ulong mask,
842 abi_ulong fpstate_addr)
843 {
844 CPUState *cs = CPU(x86_env_get_cpu(env));
845 uint16_t magic;
846
847 /* already locked in setup_frame() */
848 __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
849 __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
850 __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
851 __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
852 __put_user(env->regs[R_EDI], &sc->edi);
853 __put_user(env->regs[R_ESI], &sc->esi);
854 __put_user(env->regs[R_EBP], &sc->ebp);
855 __put_user(env->regs[R_ESP], &sc->esp);
856 __put_user(env->regs[R_EBX], &sc->ebx);
857 __put_user(env->regs[R_EDX], &sc->edx);
858 __put_user(env->regs[R_ECX], &sc->ecx);
859 __put_user(env->regs[R_EAX], &sc->eax);
860 __put_user(cs->exception_index, &sc->trapno);
861 __put_user(env->error_code, &sc->err);
862 __put_user(env->eip, &sc->eip);
863 __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
864 __put_user(env->eflags, &sc->eflags);
865 __put_user(env->regs[R_ESP], &sc->esp_at_signal);
866 __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
867
868 cpu_x86_fsave(env, fpstate_addr, 1);
869 fpstate->status = fpstate->sw;
870 magic = 0xffff;
871 __put_user(magic, &fpstate->magic);
872 __put_user(fpstate_addr, &sc->fpstate);
873
874 /* non-iBCS2 extensions.. */
875 __put_user(mask, &sc->oldmask);
876 __put_user(env->cr[2], &sc->cr2);
877 }
878
879 /*
880 * Determine which stack to use..
881 */
882
883 static inline abi_ulong
884 get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
885 {
886 unsigned long esp;
887
888 /* Default to using normal stack */
889 esp = env->regs[R_ESP];
890 /* This is the X/Open sanctioned signal stack switching. */
891 if (ka->sa_flags & TARGET_SA_ONSTACK) {
892 if (sas_ss_flags(esp) == 0)
893 esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
894 }
895
896 /* This is the legacy signal stack switching. */
897 else
898 if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
899 !(ka->sa_flags & TARGET_SA_RESTORER) &&
900 ka->sa_restorer) {
901 esp = (unsigned long) ka->sa_restorer;
902 }
903 return (esp - frame_size) & -8ul;
904 }
905
906 /* compare linux/arch/i386/kernel/signal.c:setup_frame() */
907 static void setup_frame(int sig, struct target_sigaction *ka,
908 target_sigset_t *set, CPUX86State *env)
909 {
910 abi_ulong frame_addr;
911 struct sigframe *frame;
912 int i;
913
914 frame_addr = get_sigframe(ka, env, sizeof(*frame));
915
916 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
917 goto give_sigsegv;
918
919 __put_user(current_exec_domain_sig(sig),
920 &frame->sig);
921
922 setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
923 frame_addr + offsetof(struct sigframe, fpstate));
924
925 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
926 __put_user(set->sig[i], &frame->extramask[i - 1]);
927 }
928
929 /* Set up to return from userspace. If provided, use a stub
930 already in userspace. */
931 if (ka->sa_flags & TARGET_SA_RESTORER) {
932 __put_user(ka->sa_restorer, &frame->pretcode);
933 } else {
934 uint16_t val16;
935 abi_ulong retcode_addr;
936 retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
937 __put_user(retcode_addr, &frame->pretcode);
938 /* This is popl %eax ; movl $,%eax ; int $0x80 */
939 val16 = 0xb858;
940 __put_user(val16, (uint16_t *)(frame->retcode+0));
941 __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
942 val16 = 0x80cd;
943 __put_user(val16, (uint16_t *)(frame->retcode+6));
944 }
945
946
947 /* Set up registers for signal handler */
948 env->regs[R_ESP] = frame_addr;
949 env->eip = ka->_sa_handler;
950
951 cpu_x86_load_seg(env, R_DS, __USER_DS);
952 cpu_x86_load_seg(env, R_ES, __USER_DS);
953 cpu_x86_load_seg(env, R_SS, __USER_DS);
954 cpu_x86_load_seg(env, R_CS, __USER_CS);
955 env->eflags &= ~TF_MASK;
956
957 unlock_user_struct(frame, frame_addr, 1);
958
959 return;
960
961 give_sigsegv:
962 if (sig == TARGET_SIGSEGV)
963 ka->_sa_handler = TARGET_SIG_DFL;
964 force_sig(TARGET_SIGSEGV /* , current */);
965 }
966
967 /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
968 static void setup_rt_frame(int sig, struct target_sigaction *ka,
969 target_siginfo_t *info,
970 target_sigset_t *set, CPUX86State *env)
971 {
972 abi_ulong frame_addr, addr;
973 struct rt_sigframe *frame;
974 int i;
975
976 frame_addr = get_sigframe(ka, env, sizeof(*frame));
977
978 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
979 goto give_sigsegv;
980
981 __put_user(current_exec_domain_sig(sig), &frame->sig);
982 addr = frame_addr + offsetof(struct rt_sigframe, info);
983 __put_user(addr, &frame->pinfo);
984 addr = frame_addr + offsetof(struct rt_sigframe, uc);
985 __put_user(addr, &frame->puc);
986 copy_siginfo_to_user(&frame->info, info);
987
988 /* Create the ucontext. */
989 __put_user(0, &frame->uc.tuc_flags);
990 __put_user(0, &frame->uc.tuc_link);
991 __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
992 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
993 &frame->uc.tuc_stack.ss_flags);
994 __put_user(target_sigaltstack_used.ss_size,
995 &frame->uc.tuc_stack.ss_size);
996 setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, env,
997 set->sig[0], frame_addr + offsetof(struct rt_sigframe, fpstate));
998
999 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1000 __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
1001 }
1002
1003 /* Set up to return from userspace. If provided, use a stub
1004 already in userspace. */
1005 if (ka->sa_flags & TARGET_SA_RESTORER) {
1006 __put_user(ka->sa_restorer, &frame->pretcode);
1007 } else {
1008 uint16_t val16;
1009 addr = frame_addr + offsetof(struct rt_sigframe, retcode);
1010 __put_user(addr, &frame->pretcode);
1011 /* This is movl $,%eax ; int $0x80 */
1012 __put_user(0xb8, (char *)(frame->retcode+0));
1013 __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
1014 val16 = 0x80cd;
1015 __put_user(val16, (uint16_t *)(frame->retcode+5));
1016 }
1017
1018 /* Set up registers for signal handler */
1019 env->regs[R_ESP] = frame_addr;
1020 env->eip = ka->_sa_handler;
1021
1022 cpu_x86_load_seg(env, R_DS, __USER_DS);
1023 cpu_x86_load_seg(env, R_ES, __USER_DS);
1024 cpu_x86_load_seg(env, R_SS, __USER_DS);
1025 cpu_x86_load_seg(env, R_CS, __USER_CS);
1026 env->eflags &= ~TF_MASK;
1027
1028 unlock_user_struct(frame, frame_addr, 1);
1029
1030 return;
1031
1032 give_sigsegv:
1033 if (sig == TARGET_SIGSEGV)
1034 ka->_sa_handler = TARGET_SIG_DFL;
1035 force_sig(TARGET_SIGSEGV /* , current */);
1036 }
1037
1038 static int
1039 restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
1040 {
1041 unsigned int err = 0;
1042 abi_ulong fpstate_addr;
1043 unsigned int tmpflags;
1044
1045 cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
1046 cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
1047 cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
1048 cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
1049
1050 env->regs[R_EDI] = tswapl(sc->edi);
1051 env->regs[R_ESI] = tswapl(sc->esi);
1052 env->regs[R_EBP] = tswapl(sc->ebp);
1053 env->regs[R_ESP] = tswapl(sc->esp);
1054 env->regs[R_EBX] = tswapl(sc->ebx);
1055 env->regs[R_EDX] = tswapl(sc->edx);
1056 env->regs[R_ECX] = tswapl(sc->ecx);
1057 env->eip = tswapl(sc->eip);
1058
1059 cpu_x86_load_seg(env, R_CS, lduw_p(&sc->cs) | 3);
1060 cpu_x86_load_seg(env, R_SS, lduw_p(&sc->ss) | 3);
1061
1062 tmpflags = tswapl(sc->eflags);
1063 env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
1064 // regs->orig_eax = -1; /* disable syscall checks */
1065
1066 fpstate_addr = tswapl(sc->fpstate);
1067 if (fpstate_addr != 0) {
1068 if (!access_ok(VERIFY_READ, fpstate_addr,
1069 sizeof(struct target_fpstate)))
1070 goto badframe;
1071 cpu_x86_frstor(env, fpstate_addr, 1);
1072 }
1073
1074 *peax = tswapl(sc->eax);
1075 return err;
1076 badframe:
1077 return 1;
1078 }
1079
1080 long do_sigreturn(CPUX86State *env)
1081 {
1082 struct sigframe *frame;
1083 abi_ulong frame_addr = env->regs[R_ESP] - 8;
1084 target_sigset_t target_set;
1085 sigset_t set;
1086 int eax, i;
1087
1088 #if defined(DEBUG_SIGNAL)
1089 fprintf(stderr, "do_sigreturn\n");
1090 #endif
1091 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1092 goto badframe;
1093 /* set blocked signals */
1094 __get_user(target_set.sig[0], &frame->sc.oldmask);
1095 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1096 __get_user(target_set.sig[i], &frame->extramask[i - 1]);
1097 }
1098
1099 target_to_host_sigset_internal(&set, &target_set);
1100 do_sigprocmask(SIG_SETMASK, &set, NULL);
1101
1102 /* restore registers */
1103 if (restore_sigcontext(env, &frame->sc, &eax))
1104 goto badframe;
1105 unlock_user_struct(frame, frame_addr, 0);
1106 return eax;
1107
1108 badframe:
1109 unlock_user_struct(frame, frame_addr, 0);
1110 force_sig(TARGET_SIGSEGV);
1111 return 0;
1112 }
1113
1114 long do_rt_sigreturn(CPUX86State *env)
1115 {
1116 abi_ulong frame_addr;
1117 struct rt_sigframe *frame;
1118 sigset_t set;
1119 int eax;
1120
1121 frame_addr = env->regs[R_ESP] - 4;
1122 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1123 goto badframe;
1124 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
1125 do_sigprocmask(SIG_SETMASK, &set, NULL);
1126
1127 if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
1128 goto badframe;
1129
1130 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
1131 get_sp_from_cpustate(env)) == -EFAULT)
1132 goto badframe;
1133
1134 unlock_user_struct(frame, frame_addr, 0);
1135 return eax;
1136
1137 badframe:
1138 unlock_user_struct(frame, frame_addr, 0);
1139 force_sig(TARGET_SIGSEGV);
1140 return 0;
1141 }
1142
1143 #elif defined(TARGET_AARCH64)
1144
1145 struct target_sigcontext {
1146 uint64_t fault_address;
1147 /* AArch64 registers */
1148 uint64_t regs[31];
1149 uint64_t sp;
1150 uint64_t pc;
1151 uint64_t pstate;
1152 /* 4K reserved for FP/SIMD state and future expansion */
1153 char __reserved[4096] __attribute__((__aligned__(16)));
1154 };
1155
1156 struct target_ucontext {
1157 abi_ulong tuc_flags;
1158 abi_ulong tuc_link;
1159 target_stack_t tuc_stack;
1160 target_sigset_t tuc_sigmask;
1161 /* glibc uses a 1024-bit sigset_t */
1162 char __unused[1024 / 8 - sizeof(target_sigset_t)];
1163 /* last for future expansion */
1164 struct target_sigcontext tuc_mcontext;
1165 };
1166
1167 /*
1168 * Header to be used at the beginning of structures extending the user
1169 * context. Such structures must be placed after the rt_sigframe on the stack
1170 * and be 16-byte aligned. The last structure must be a dummy one with the
1171 * magic and size set to 0.
1172 */
1173 struct target_aarch64_ctx {
1174 uint32_t magic;
1175 uint32_t size;
1176 };
1177
1178 #define TARGET_FPSIMD_MAGIC 0x46508001
1179
1180 struct target_fpsimd_context {
1181 struct target_aarch64_ctx head;
1182 uint32_t fpsr;
1183 uint32_t fpcr;
1184 uint64_t vregs[32 * 2]; /* really uint128_t vregs[32] */
1185 };
1186
1187 /*
1188 * Auxiliary context saved in the sigcontext.__reserved array. Not exported to
1189 * user space as it will change with the addition of new context. User space
1190 * should check the magic/size information.
1191 */
1192 struct target_aux_context {
1193 struct target_fpsimd_context fpsimd;
1194 /* additional context to be added before "end" */
1195 struct target_aarch64_ctx end;
1196 };
1197
1198 struct target_rt_sigframe {
1199 struct target_siginfo info;
1200 struct target_ucontext uc;
1201 uint64_t fp;
1202 uint64_t lr;
1203 uint32_t tramp[2];
1204 };
1205
1206 static int target_setup_sigframe(struct target_rt_sigframe *sf,
1207 CPUARMState *env, target_sigset_t *set)
1208 {
1209 int i;
1210 struct target_aux_context *aux =
1211 (struct target_aux_context *)sf->uc.tuc_mcontext.__reserved;
1212
1213 /* set up the stack frame for unwinding */
1214 __put_user(env->xregs[29], &sf->fp);
1215 __put_user(env->xregs[30], &sf->lr);
1216
1217 for (i = 0; i < 31; i++) {
1218 __put_user(env->xregs[i], &sf->uc.tuc_mcontext.regs[i]);
1219 }
1220 __put_user(env->xregs[31], &sf->uc.tuc_mcontext.sp);
1221 __put_user(env->pc, &sf->uc.tuc_mcontext.pc);
1222 __put_user(pstate_read(env), &sf->uc.tuc_mcontext.pstate);
1223
1224 __put_user(env->exception.vaddress, &sf->uc.tuc_mcontext.fault_address);
1225
1226 for (i = 0; i < TARGET_NSIG_WORDS; i++) {
1227 __put_user(set->sig[i], &sf->uc.tuc_sigmask.sig[i]);
1228 }
1229
1230 for (i = 0; i < 32; i++) {
1231 #ifdef TARGET_WORDS_BIGENDIAN
1232 __put_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2 + 1]);
1233 __put_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2]);
1234 #else
1235 __put_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2]);
1236 __put_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2 + 1]);
1237 #endif
1238 }
1239 __put_user(vfp_get_fpsr(env), &aux->fpsimd.fpsr);
1240 __put_user(vfp_get_fpcr(env), &aux->fpsimd.fpcr);
1241 __put_user(TARGET_FPSIMD_MAGIC, &aux->fpsimd.head.magic);
1242 __put_user(sizeof(struct target_fpsimd_context),
1243 &aux->fpsimd.head.size);
1244
1245 /* set the "end" magic */
1246 __put_user(0, &aux->end.magic);
1247 __put_user(0, &aux->end.size);
1248
1249 return 0;
1250 }
1251
1252 static int target_restore_sigframe(CPUARMState *env,
1253 struct target_rt_sigframe *sf)
1254 {
1255 sigset_t set;
1256 int i;
1257 struct target_aux_context *aux =
1258 (struct target_aux_context *)sf->uc.tuc_mcontext.__reserved;
1259 uint32_t magic, size, fpsr, fpcr;
1260 uint64_t pstate;
1261
1262 target_to_host_sigset(&set, &sf->uc.tuc_sigmask);
1263 do_sigprocmask(SIG_SETMASK, &set, NULL);
1264
1265 for (i = 0; i < 31; i++) {
1266 __get_user(env->xregs[i], &sf->uc.tuc_mcontext.regs[i]);
1267 }
1268
1269 __get_user(env->xregs[31], &sf->uc.tuc_mcontext.sp);
1270 __get_user(env->pc, &sf->uc.tuc_mcontext.pc);
1271 __get_user(pstate, &sf->uc.tuc_mcontext.pstate);
1272 pstate_write(env, pstate);
1273
1274 __get_user(magic, &aux->fpsimd.head.magic);
1275 __get_user(size, &aux->fpsimd.head.size);
1276
1277 if (magic != TARGET_FPSIMD_MAGIC
1278 || size != sizeof(struct target_fpsimd_context)) {
1279 return 1;
1280 }
1281
1282 for (i = 0; i < 32; i++) {
1283 #ifdef TARGET_WORDS_BIGENDIAN
1284 __get_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2 + 1]);
1285 __get_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2]);
1286 #else
1287 __get_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2]);
1288 __get_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2 + 1]);
1289 #endif
1290 }
1291 __get_user(fpsr, &aux->fpsimd.fpsr);
1292 vfp_set_fpsr(env, fpsr);
1293 __get_user(fpcr, &aux->fpsimd.fpcr);
1294 vfp_set_fpcr(env, fpcr);
1295
1296 return 0;
1297 }
1298
1299 static abi_ulong get_sigframe(struct target_sigaction *ka, CPUARMState *env)
1300 {
1301 abi_ulong sp;
1302
1303 sp = env->xregs[31];
1304
1305 /*
1306 * This is the X/Open sanctioned signal stack switching.
1307 */
1308 if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) {
1309 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1310 }
1311
1312 sp = (sp - sizeof(struct target_rt_sigframe)) & ~15;
1313
1314 return sp;
1315 }
1316
1317 static void target_setup_frame(int usig, struct target_sigaction *ka,
1318 target_siginfo_t *info, target_sigset_t *set,
1319 CPUARMState *env)
1320 {
1321 struct target_rt_sigframe *frame;
1322 abi_ulong frame_addr, return_addr;
1323
1324 frame_addr = get_sigframe(ka, env);
1325 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
1326 goto give_sigsegv;
1327 }
1328
1329 __put_user(0, &frame->uc.tuc_flags);
1330 __put_user(0, &frame->uc.tuc_link);
1331
1332 __put_user(target_sigaltstack_used.ss_sp,
1333 &frame->uc.tuc_stack.ss_sp);
1334 __put_user(sas_ss_flags(env->xregs[31]),
1335 &frame->uc.tuc_stack.ss_flags);
1336 __put_user(target_sigaltstack_used.ss_size,
1337 &frame->uc.tuc_stack.ss_size);
1338 target_setup_sigframe(frame, env, set);
1339 if (ka->sa_flags & TARGET_SA_RESTORER) {
1340 return_addr = ka->sa_restorer;
1341 } else {
1342 /* mov x8,#__NR_rt_sigreturn; svc #0 */
1343 __put_user(0xd2801168, &frame->tramp[0]);
1344 __put_user(0xd4000001, &frame->tramp[1]);
1345 return_addr = frame_addr + offsetof(struct target_rt_sigframe, tramp);
1346 }
1347 env->xregs[0] = usig;
1348 env->xregs[31] = frame_addr;
1349 env->xregs[29] = env->xregs[31] + offsetof(struct target_rt_sigframe, fp);
1350 env->pc = ka->_sa_handler;
1351 env->xregs[30] = return_addr;
1352 if (info) {
1353 copy_siginfo_to_user(&frame->info, info);
1354 env->xregs[1] = frame_addr + offsetof(struct target_rt_sigframe, info);
1355 env->xregs[2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
1356 }
1357
1358 unlock_user_struct(frame, frame_addr, 1);
1359 return;
1360
1361 give_sigsegv:
1362 unlock_user_struct(frame, frame_addr, 1);
1363 force_sig(TARGET_SIGSEGV);
1364 }
1365
1366 static void setup_rt_frame(int sig, struct target_sigaction *ka,
1367 target_siginfo_t *info, target_sigset_t *set,
1368 CPUARMState *env)
1369 {
1370 target_setup_frame(sig, ka, info, set, env);
1371 }
1372
1373 static void setup_frame(int sig, struct target_sigaction *ka,
1374 target_sigset_t *set, CPUARMState *env)
1375 {
1376 target_setup_frame(sig, ka, 0, set, env);
1377 }
1378
1379 long do_rt_sigreturn(CPUARMState *env)
1380 {
1381 struct target_rt_sigframe *frame = NULL;
1382 abi_ulong frame_addr = env->xregs[31];
1383
1384 if (frame_addr & 15) {
1385 goto badframe;
1386 }
1387
1388 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
1389 goto badframe;
1390 }
1391
1392 if (target_restore_sigframe(env, frame)) {
1393 goto badframe;
1394 }
1395
1396 if (do_sigaltstack(frame_addr +
1397 offsetof(struct target_rt_sigframe, uc.tuc_stack),
1398 0, get_sp_from_cpustate(env)) == -EFAULT) {
1399 goto badframe;
1400 }
1401
1402 unlock_user_struct(frame, frame_addr, 0);
1403 return env->xregs[0];
1404
1405 badframe:
1406 unlock_user_struct(frame, frame_addr, 0);
1407 force_sig(TARGET_SIGSEGV);
1408 return 0;
1409 }
1410
1411 long do_sigreturn(CPUARMState *env)
1412 {
1413 return do_rt_sigreturn(env);
1414 }
1415
1416 #elif defined(TARGET_ARM)
1417
1418 struct target_sigcontext {
1419 abi_ulong trap_no;
1420 abi_ulong error_code;
1421 abi_ulong oldmask;
1422 abi_ulong arm_r0;
1423 abi_ulong arm_r1;
1424 abi_ulong arm_r2;
1425 abi_ulong arm_r3;
1426 abi_ulong arm_r4;
1427 abi_ulong arm_r5;
1428 abi_ulong arm_r6;
1429 abi_ulong arm_r7;
1430 abi_ulong arm_r8;
1431 abi_ulong arm_r9;
1432 abi_ulong arm_r10;
1433 abi_ulong arm_fp;
1434 abi_ulong arm_ip;
1435 abi_ulong arm_sp;
1436 abi_ulong arm_lr;
1437 abi_ulong arm_pc;
1438 abi_ulong arm_cpsr;
1439 abi_ulong fault_address;
1440 };
1441
1442 struct target_ucontext_v1 {
1443 abi_ulong tuc_flags;
1444 abi_ulong tuc_link;
1445 target_stack_t tuc_stack;
1446 struct target_sigcontext tuc_mcontext;
1447 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1448 };
1449
1450 struct target_ucontext_v2 {
1451 abi_ulong tuc_flags;
1452 abi_ulong tuc_link;
1453 target_stack_t tuc_stack;
1454 struct target_sigcontext tuc_mcontext;
1455 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1456 char __unused[128 - sizeof(target_sigset_t)];
1457 abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
1458 };
1459
1460 struct target_user_vfp {
1461 uint64_t fpregs[32];
1462 abi_ulong fpscr;
1463 };
1464
1465 struct target_user_vfp_exc {
1466 abi_ulong fpexc;
1467 abi_ulong fpinst;
1468 abi_ulong fpinst2;
1469 };
1470
1471 struct target_vfp_sigframe {
1472 abi_ulong magic;
1473 abi_ulong size;
1474 struct target_user_vfp ufp;
1475 struct target_user_vfp_exc ufp_exc;
1476 } __attribute__((__aligned__(8)));
1477
1478 struct target_iwmmxt_sigframe {
1479 abi_ulong magic;
1480 abi_ulong size;
1481 uint64_t regs[16];
1482 /* Note that not all the coprocessor control registers are stored here */
1483 uint32_t wcssf;
1484 uint32_t wcasf;
1485 uint32_t wcgr0;
1486 uint32_t wcgr1;
1487 uint32_t wcgr2;
1488 uint32_t wcgr3;
1489 } __attribute__((__aligned__(8)));
1490
1491 #define TARGET_VFP_MAGIC 0x56465001
1492 #define TARGET_IWMMXT_MAGIC 0x12ef842a
1493
1494 struct sigframe_v1
1495 {
1496 struct target_sigcontext sc;
1497 abi_ulong extramask[TARGET_NSIG_WORDS-1];
1498 abi_ulong retcode;
1499 };
1500
1501 struct sigframe_v2
1502 {
1503 struct target_ucontext_v2 uc;
1504 abi_ulong retcode;
1505 };
1506
1507 struct rt_sigframe_v1
1508 {
1509 abi_ulong pinfo;
1510 abi_ulong puc;
1511 struct target_siginfo info;
1512 struct target_ucontext_v1 uc;
1513 abi_ulong retcode;
1514 };
1515
1516 struct rt_sigframe_v2
1517 {
1518 struct target_siginfo info;
1519 struct target_ucontext_v2 uc;
1520 abi_ulong retcode;
1521 };
1522
1523 #define TARGET_CONFIG_CPU_32 1
1524
1525 /*
1526 * For ARM syscalls, we encode the syscall number into the instruction.
1527 */
1528 #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
1529 #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
1530
1531 /*
1532 * For Thumb syscalls, we pass the syscall number via r7. We therefore
1533 * need two 16-bit instructions.
1534 */
1535 #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
1536 #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
1537
1538 static const abi_ulong retcodes[4] = {
1539 SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
1540 SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
1541 };
1542
1543
1544 static inline int valid_user_regs(CPUARMState *regs)
1545 {
1546 return 1;
1547 }
1548
1549 static void
1550 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1551 CPUARMState *env, abi_ulong mask)
1552 {
1553 __put_user(env->regs[0], &sc->arm_r0);
1554 __put_user(env->regs[1], &sc->arm_r1);
1555 __put_user(env->regs[2], &sc->arm_r2);
1556 __put_user(env->regs[3], &sc->arm_r3);
1557 __put_user(env->regs[4], &sc->arm_r4);
1558 __put_user(env->regs[5], &sc->arm_r5);
1559 __put_user(env->regs[6], &sc->arm_r6);
1560 __put_user(env->regs[7], &sc->arm_r7);
1561 __put_user(env->regs[8], &sc->arm_r8);
1562 __put_user(env->regs[9], &sc->arm_r9);
1563 __put_user(env->regs[10], &sc->arm_r10);
1564 __put_user(env->regs[11], &sc->arm_fp);
1565 __put_user(env->regs[12], &sc->arm_ip);
1566 __put_user(env->regs[13], &sc->arm_sp);
1567 __put_user(env->regs[14], &sc->arm_lr);
1568 __put_user(env->regs[15], &sc->arm_pc);
1569 #ifdef TARGET_CONFIG_CPU_32
1570 __put_user(cpsr_read(env), &sc->arm_cpsr);
1571 #endif
1572
1573 __put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
1574 __put_user(/* current->thread.error_code */ 0, &sc->error_code);
1575 __put_user(/* current->thread.address */ 0, &sc->fault_address);
1576 __put_user(mask, &sc->oldmask);
1577 }
1578
1579 static inline abi_ulong
1580 get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize)
1581 {
1582 unsigned long sp = regs->regs[13];
1583
1584 /*
1585 * This is the X/Open sanctioned signal stack switching.
1586 */
1587 if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
1588 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1589 /*
1590 * ATPCS B01 mandates 8-byte alignment
1591 */
1592 return (sp - framesize) & ~7;
1593 }
1594
1595 static void
1596 setup_return(CPUARMState *env, struct target_sigaction *ka,
1597 abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
1598 {
1599 abi_ulong handler = ka->_sa_handler;
1600 abi_ulong retcode;
1601 int thumb = handler & 1;
1602 uint32_t cpsr = cpsr_read(env);
1603
1604 cpsr &= ~CPSR_IT;
1605 if (thumb) {
1606 cpsr |= CPSR_T;
1607 } else {
1608 cpsr &= ~CPSR_T;
1609 }
1610
1611 if (ka->sa_flags & TARGET_SA_RESTORER) {
1612 retcode = ka->sa_restorer;
1613 } else {
1614 unsigned int idx = thumb;
1615
1616 if (ka->sa_flags & TARGET_SA_SIGINFO)
1617 idx += 2;
1618
1619 __put_user(retcodes[idx], rc);
1620
1621 retcode = rc_addr + thumb;
1622 }
1623
1624 env->regs[0] = usig;
1625 env->regs[13] = frame_addr;
1626 env->regs[14] = retcode;
1627 env->regs[15] = handler & (thumb ? ~1 : ~3);
1628 cpsr_write(env, cpsr, 0xffffffff);
1629 }
1630
1631 static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env)
1632 {
1633 int i;
1634 struct target_vfp_sigframe *vfpframe;
1635 vfpframe = (struct target_vfp_sigframe *)regspace;
1636 __put_user(TARGET_VFP_MAGIC, &vfpframe->magic);
1637 __put_user(sizeof(*vfpframe), &vfpframe->size);
1638 for (i = 0; i < 32; i++) {
1639 __put_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]);
1640 }
1641 __put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr);
1642 __put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc);
1643 __put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
1644 __put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
1645 return (abi_ulong*)(vfpframe+1);
1646 }
1647
1648 static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace,
1649 CPUARMState *env)
1650 {
1651 int i;
1652 struct target_iwmmxt_sigframe *iwmmxtframe;
1653 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
1654 __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic);
1655 __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size);
1656 for (i = 0; i < 16; i++) {
1657 __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
1658 }
1659 __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
1660 __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
1661 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
1662 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
1663 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
1664 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
1665 return (abi_ulong*)(iwmmxtframe+1);
1666 }
1667
1668 static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
1669 target_sigset_t *set, CPUARMState *env)
1670 {
1671 struct target_sigaltstack stack;
1672 int i;
1673 abi_ulong *regspace;
1674
1675 /* Clear all the bits of the ucontext we don't use. */
1676 memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
1677
1678 memset(&stack, 0, sizeof(stack));
1679 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1680 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1681 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1682 memcpy(&uc->tuc_stack, &stack, sizeof(stack));
1683
1684 setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
1685 /* Save coprocessor signal frame. */
1686 regspace = uc->tuc_regspace;
1687 if (arm_feature(env, ARM_FEATURE_VFP)) {
1688 regspace = setup_sigframe_v2_vfp(regspace, env);
1689 }
1690 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
1691 regspace = setup_sigframe_v2_iwmmxt(regspace, env);
1692 }
1693
1694 /* Write terminating magic word */
1695 __put_user(0, regspace);
1696
1697 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1698 __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
1699 }
1700 }
1701
1702 /* compare linux/arch/arm/kernel/signal.c:setup_frame() */
1703 static void setup_frame_v1(int usig, struct target_sigaction *ka,
1704 target_sigset_t *set, CPUARMState *regs)
1705 {
1706 struct sigframe_v1 *frame;
1707 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1708 int i;
1709
1710 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1711 return;
1712
1713 setup_sigcontext(&frame->sc, regs, set->sig[0]);
1714
1715 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1716 __put_user(set->sig[i], &frame->extramask[i - 1]);
1717 }
1718
1719 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1720 frame_addr + offsetof(struct sigframe_v1, retcode));
1721
1722 unlock_user_struct(frame, frame_addr, 1);
1723 }
1724
1725 static void setup_frame_v2(int usig, struct target_sigaction *ka,
1726 target_sigset_t *set, CPUARMState *regs)
1727 {
1728 struct sigframe_v2 *frame;
1729 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1730
1731 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1732 return;
1733
1734 setup_sigframe_v2(&frame->uc, set, regs);
1735
1736 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1737 frame_addr + offsetof(struct sigframe_v2, retcode));
1738
1739 unlock_user_struct(frame, frame_addr, 1);
1740 }
1741
1742 static void setup_frame(int usig, struct target_sigaction *ka,
1743 target_sigset_t *set, CPUARMState *regs)
1744 {
1745 if (get_osversion() >= 0x020612) {
1746 setup_frame_v2(usig, ka, set, regs);
1747 } else {
1748 setup_frame_v1(usig, ka, set, regs);
1749 }
1750 }
1751
1752 /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
1753 static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
1754 target_siginfo_t *info,
1755 target_sigset_t *set, CPUARMState *env)
1756 {
1757 struct rt_sigframe_v1 *frame;
1758 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1759 struct target_sigaltstack stack;
1760 int i;
1761 abi_ulong info_addr, uc_addr;
1762
1763 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1764 return /* 1 */;
1765
1766 info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
1767 __put_user(info_addr, &frame->pinfo);
1768 uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
1769 __put_user(uc_addr, &frame->puc);
1770 copy_siginfo_to_user(&frame->info, info);
1771
1772 /* Clear all the bits of the ucontext we don't use. */
1773 memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
1774
1775 memset(&stack, 0, sizeof(stack));
1776 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1777 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1778 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1779 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
1780
1781 setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
1782 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1783 __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
1784 }
1785
1786 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1787 frame_addr + offsetof(struct rt_sigframe_v1, retcode));
1788
1789 env->regs[1] = info_addr;
1790 env->regs[2] = uc_addr;
1791
1792 unlock_user_struct(frame, frame_addr, 1);
1793 }
1794
1795 static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
1796 target_siginfo_t *info,
1797 target_sigset_t *set, CPUARMState *env)
1798 {
1799 struct rt_sigframe_v2 *frame;
1800 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1801 abi_ulong info_addr, uc_addr;
1802
1803 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1804 return /* 1 */;
1805
1806 info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
1807 uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
1808 copy_siginfo_to_user(&frame->info, info);
1809
1810 setup_sigframe_v2(&frame->uc, set, env);
1811
1812 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1813 frame_addr + offsetof(struct rt_sigframe_v2, retcode));
1814
1815 env->regs[1] = info_addr;
1816 env->regs[2] = uc_addr;
1817
1818 unlock_user_struct(frame, frame_addr, 1);
1819 }
1820
1821 static void setup_rt_frame(int usig, struct target_sigaction *ka,
1822 target_siginfo_t *info,
1823 target_sigset_t *set, CPUARMState *env)
1824 {
1825 if (get_osversion() >= 0x020612) {
1826 setup_rt_frame_v2(usig, ka, info, set, env);
1827 } else {
1828 setup_rt_frame_v1(usig, ka, info, set, env);
1829 }
1830 }
1831
1832 static int
1833 restore_sigcontext(CPUARMState *env, struct target_sigcontext *sc)
1834 {
1835 int err = 0;
1836 uint32_t cpsr;
1837
1838 __get_user(env->regs[0], &sc->arm_r0);
1839 __get_user(env->regs[1], &sc->arm_r1);
1840 __get_user(env->regs[2], &sc->arm_r2);
1841 __get_user(env->regs[3], &sc->arm_r3);
1842 __get_user(env->regs[4], &sc->arm_r4);
1843 __get_user(env->regs[5], &sc->arm_r5);
1844 __get_user(env->regs[6], &sc->arm_r6);
1845 __get_user(env->regs[7], &sc->arm_r7);
1846 __get_user(env->regs[8], &sc->arm_r8);
1847 __get_user(env->regs[9], &sc->arm_r9);
1848 __get_user(env->regs[10], &sc->arm_r10);
1849 __get_user(env->regs[11], &sc->arm_fp);
1850 __get_user(env->regs[12], &sc->arm_ip);
1851 __get_user(env->regs[13], &sc->arm_sp);
1852 __get_user(env->regs[14], &sc->arm_lr);
1853 __get_user(env->regs[15], &sc->arm_pc);
1854 #ifdef TARGET_CONFIG_CPU_32
1855 __get_user(cpsr, &sc->arm_cpsr);
1856 cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC);
1857 #endif
1858
1859 err |= !valid_user_regs(env);
1860
1861 return err;
1862 }
1863
1864 static long do_sigreturn_v1(CPUARMState *env)
1865 {
1866 abi_ulong frame_addr;
1867 struct sigframe_v1 *frame = NULL;
1868 target_sigset_t set;
1869 sigset_t host_set;
1870 int i;
1871
1872 /*
1873 * Since we stacked the signal on a 64-bit boundary,
1874 * then 'sp' should be word aligned here. If it's
1875 * not, then the user is trying to mess with us.
1876 */
1877 frame_addr = env->regs[13];
1878 if (frame_addr & 7) {
1879 goto badframe;
1880 }
1881
1882 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1883 goto badframe;
1884
1885 __get_user(set.sig[0], &frame->sc.oldmask);
1886 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1887 __get_user(set.sig[i], &frame->extramask[i - 1]);
1888 }
1889
1890 target_to_host_sigset_internal(&host_set, &set);
1891 do_sigprocmask(SIG_SETMASK, &host_set, NULL);
1892
1893 if (restore_sigcontext(env, &frame->sc))
1894 goto badframe;
1895
1896 #if 0
1897 /* Send SIGTRAP if we're single-stepping */
1898 if (ptrace_cancel_bpt(current))
1899 send_sig(SIGTRAP, current, 1);
1900 #endif
1901 unlock_user_struct(frame, frame_addr, 0);
1902 return env->regs[0];
1903
1904 badframe:
1905 force_sig(TARGET_SIGSEGV /* , current */);
1906 return 0;
1907 }
1908
1909 static abi_ulong *restore_sigframe_v2_vfp(CPUARMState *env, abi_ulong *regspace)
1910 {
1911 int i;
1912 abi_ulong magic, sz;
1913 uint32_t fpscr, fpexc;
1914 struct target_vfp_sigframe *vfpframe;
1915 vfpframe = (struct target_vfp_sigframe *)regspace;
1916
1917 __get_user(magic, &vfpframe->magic);
1918 __get_user(sz, &vfpframe->size);
1919 if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) {
1920 return 0;
1921 }
1922 for (i = 0; i < 32; i++) {
1923 __get_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]);
1924 }
1925 __get_user(fpscr, &vfpframe->ufp.fpscr);
1926 vfp_set_fpscr(env, fpscr);
1927 __get_user(fpexc, &vfpframe->ufp_exc.fpexc);
1928 /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid
1929 * and the exception flag is cleared
1930 */
1931 fpexc |= (1 << 30);
1932 fpexc &= ~((1 << 31) | (1 << 28));
1933 env->vfp.xregs[ARM_VFP_FPEXC] = fpexc;
1934 __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
1935 __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
1936 return (abi_ulong*)(vfpframe + 1);
1937 }
1938
1939 static abi_ulong *restore_sigframe_v2_iwmmxt(CPUARMState *env,
1940 abi_ulong *regspace)
1941 {
1942 int i;
1943 abi_ulong magic, sz;
1944 struct target_iwmmxt_sigframe *iwmmxtframe;
1945 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
1946
1947 __get_user(magic, &iwmmxtframe->magic);
1948 __get_user(sz, &iwmmxtframe->size);
1949 if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) {
1950 return 0;
1951 }
1952 for (i = 0; i < 16; i++) {
1953 __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
1954 }
1955 __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
1956 __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
1957 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
1958 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
1959 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
1960 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
1961 return (abi_ulong*)(iwmmxtframe + 1);
1962 }
1963
1964 static int do_sigframe_return_v2(CPUARMState *env, target_ulong frame_addr,
1965 struct target_ucontext_v2 *uc)
1966 {
1967 sigset_t host_set;
1968 abi_ulong *regspace;
1969
1970 target_to_host_sigset(&host_set, &uc->tuc_sigmask);
1971 do_sigprocmask(SIG_SETMASK, &host_set, NULL);
1972
1973 if (restore_sigcontext(env, &uc->tuc_mcontext))
1974 return 1;
1975
1976 /* Restore coprocessor signal frame */
1977 regspace = uc->tuc_regspace;
1978 if (arm_feature(env, ARM_FEATURE_VFP)) {
1979 regspace = restore_sigframe_v2_vfp(env, regspace);
1980 if (!regspace) {
1981 return 1;
1982 }
1983 }
1984 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
1985 regspace = restore_sigframe_v2_iwmmxt(env, regspace);
1986 if (!regspace) {
1987 return 1;
1988 }
1989 }
1990
1991 if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1992 return 1;
1993
1994 #if 0
1995 /* Send SIGTRAP if we're single-stepping */
1996 if (ptrace_cancel_bpt(current))
1997 send_sig(SIGTRAP, current, 1);
1998 #endif
1999
2000 return 0;
2001 }
2002
2003 static long do_sigreturn_v2(CPUARMState *env)
2004 {
2005 abi_ulong frame_addr;
2006 struct sigframe_v2 *frame = NULL;
2007
2008 /*
2009 * Since we stacked the signal on a 64-bit boundary,
2010 * then 'sp' should be word aligned here. If it's
2011 * not, then the user is trying to mess with us.
2012 */
2013 frame_addr = env->regs[13];
2014 if (frame_addr & 7) {
2015 goto badframe;
2016 }
2017
2018 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2019 goto badframe;
2020
2021 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
2022 goto badframe;
2023
2024 unlock_user_struct(frame, frame_addr, 0);
2025 return env->regs[0];
2026
2027 badframe:
2028 unlock_user_struct(frame, frame_addr, 0);
2029 force_sig(TARGET_SIGSEGV /* , current */);
2030 return 0;
2031 }
2032
2033 long do_sigreturn(CPUARMState *env)
2034 {
2035 if (get_osversion() >= 0x020612) {
2036 return do_sigreturn_v2(env);
2037 } else {
2038 return do_sigreturn_v1(env);
2039 }
2040 }
2041
2042 static long do_rt_sigreturn_v1(CPUARMState *env)
2043 {
2044 abi_ulong frame_addr;
2045 struct rt_sigframe_v1 *frame = NULL;
2046 sigset_t host_set;
2047
2048 /*
2049 * Since we stacked the signal on a 64-bit boundary,
2050 * then 'sp' should be word aligned here. If it's
2051 * not, then the user is trying to mess with us.
2052 */
2053 frame_addr = env->regs[13];
2054 if (frame_addr & 7) {
2055 goto badframe;
2056 }
2057
2058 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2059 goto badframe;
2060
2061 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
2062 do_sigprocmask(SIG_SETMASK, &host_set, NULL);
2063
2064 if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
2065 goto badframe;
2066
2067 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
2068 goto badframe;
2069
2070 #if 0
2071 /* Send SIGTRAP if we're single-stepping */
2072 if (ptrace_cancel_bpt(current))
2073 send_sig(SIGTRAP, current, 1);
2074 #endif
2075 unlock_user_struct(frame, frame_addr, 0);
2076 return env->regs[0];
2077
2078 badframe:
2079 unlock_user_struct(frame, frame_addr, 0);
2080 force_sig(TARGET_SIGSEGV /* , current */);
2081 return 0;
2082 }
2083
2084 static long do_rt_sigreturn_v2(CPUARMState *env)
2085 {
2086 abi_ulong frame_addr;
2087 struct rt_sigframe_v2 *frame = NULL;
2088
2089 /*
2090 * Since we stacked the signal on a 64-bit boundary,
2091 * then 'sp' should be word aligned here. If it's
2092 * not, then the user is trying to mess with us.
2093 */
2094 frame_addr = env->regs[13];
2095 if (frame_addr & 7) {
2096 goto badframe;
2097 }
2098
2099 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2100 goto badframe;
2101
2102 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
2103 goto badframe;
2104
2105 unlock_user_struct(frame, frame_addr, 0);
2106 return env->regs[0];
2107
2108 badframe:
2109 unlock_user_struct(frame, frame_addr, 0);
2110 force_sig(TARGET_SIGSEGV /* , current */);
2111 return 0;
2112 }
2113
2114 long do_rt_sigreturn(CPUARMState *env)
2115 {
2116 if (get_osversion() >= 0x020612) {
2117 return do_rt_sigreturn_v2(env);
2118 } else {
2119 return do_rt_sigreturn_v1(env);
2120 }
2121 }
2122
2123 #elif defined(TARGET_SPARC)
2124
2125 #define __SUNOS_MAXWIN 31
2126
2127 /* This is what SunOS does, so shall I. */
2128 struct target_sigcontext {
2129 abi_ulong sigc_onstack; /* state to restore */
2130
2131 abi_ulong sigc_mask; /* sigmask to restore */
2132 abi_ulong sigc_sp; /* stack pointer */
2133 abi_ulong sigc_pc; /* program counter */
2134 abi_ulong sigc_npc; /* next program counter */
2135 abi_ulong sigc_psr; /* for condition codes etc */
2136 abi_ulong sigc_g1; /* User uses these two registers */
2137 abi_ulong sigc_o0; /* within the trampoline code. */
2138
2139 /* Now comes information regarding the users window set
2140 * at the time of the signal.
2141 */
2142 abi_ulong sigc_oswins; /* outstanding windows */
2143
2144 /* stack ptrs for each regwin buf */
2145 char *sigc_spbuf[__SUNOS_MAXWIN];
2146
2147 /* Windows to restore after signal */
2148 struct {
2149 abi_ulong locals[8];
2150 abi_ulong ins[8];
2151 } sigc_wbuf[__SUNOS_MAXWIN];
2152 };
2153 /* A Sparc stack frame */
2154 struct sparc_stackf {
2155 abi_ulong locals[8];
2156 abi_ulong ins[8];
2157 /* It's simpler to treat fp and callers_pc as elements of ins[]
2158 * since we never need to access them ourselves.
2159 */
2160 char *structptr;
2161 abi_ulong xargs[6];
2162 abi_ulong xxargs[1];
2163 };
2164
2165 typedef struct {
2166 struct {
2167 abi_ulong psr;
2168 abi_ulong pc;
2169 abi_ulong npc;
2170 abi_ulong y;
2171 abi_ulong u_regs[16]; /* globals and ins */
2172 } si_regs;
2173 int si_mask;
2174 } __siginfo_t;
2175
2176 typedef struct {
2177 abi_ulong si_float_regs[32];
2178 unsigned long si_fsr;
2179 unsigned long si_fpqdepth;
2180 struct {
2181 unsigned long *insn_addr;
2182 unsigned long insn;
2183 } si_fpqueue [16];
2184 } qemu_siginfo_fpu_t;
2185
2186
2187 struct target_signal_frame {
2188 struct sparc_stackf ss;
2189 __siginfo_t info;
2190 abi_ulong fpu_save;
2191 abi_ulong insns[2] __attribute__ ((aligned (8)));
2192 abi_ulong extramask[TARGET_NSIG_WORDS - 1];
2193 abi_ulong extra_size; /* Should be 0 */
2194 qemu_siginfo_fpu_t fpu_state;
2195 };
2196 struct target_rt_signal_frame {
2197 struct sparc_stackf ss;
2198 siginfo_t info;
2199 abi_ulong regs[20];
2200 sigset_t mask;
2201 abi_ulong fpu_save;
2202 unsigned int insns[2];
2203 stack_t stack;
2204 unsigned int extra_size; /* Should be 0 */
2205 qemu_siginfo_fpu_t fpu_state;
2206 };
2207
2208 #define UREG_O0 16
2209 #define UREG_O6 22
2210 #define UREG_I0 0
2211 #define UREG_I1 1
2212 #define UREG_I2 2
2213 #define UREG_I3 3
2214 #define UREG_I4 4
2215 #define UREG_I5 5
2216 #define UREG_I6 6
2217 #define UREG_I7 7
2218 #define UREG_L0 8
2219 #define UREG_FP UREG_I6
2220 #define UREG_SP UREG_O6
2221
2222 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
2223 CPUSPARCState *env,
2224 unsigned long framesize)
2225 {
2226 abi_ulong sp;
2227
2228 sp = env->regwptr[UREG_FP];
2229
2230 /* This is the X/Open sanctioned signal stack switching. */
2231 if (sa->sa_flags & TARGET_SA_ONSTACK) {
2232 if (!on_sig_stack(sp)
2233 && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
2234 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2235 }
2236 return sp - framesize;
2237 }
2238
2239 static int
2240 setup___siginfo(__siginfo_t *si, CPUSPARCState *env, abi_ulong mask)
2241 {
2242 int err = 0, i;
2243
2244 __put_user(env->psr, &si->si_regs.psr);
2245 __put_user(env->pc, &si->si_regs.pc);
2246 __put_user(env->npc, &si->si_regs.npc);
2247 __put_user(env->y, &si->si_regs.y);
2248 for (i=0; i < 8; i++) {
2249 __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
2250 }
2251 for (i=0; i < 8; i++) {
2252 __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
2253 }
2254 __put_user(mask, &si->si_mask);
2255 return err;
2256 }
2257
2258 #if 0
2259 static int
2260 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
2261 CPUSPARCState *env, unsigned long mask)
2262 {
2263 int err = 0;
2264
2265 __put_user(mask, &sc->sigc_mask);
2266 __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
2267 __put_user(env->pc, &sc->sigc_pc);
2268 __put_user(env->npc, &sc->sigc_npc);
2269 __put_user(env->psr, &sc->sigc_psr);
2270 __put_user(env->gregs[1], &sc->sigc_g1);
2271 __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
2272
2273 return err;
2274 }
2275 #endif
2276 #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
2277
2278 static void setup_frame(int sig, struct target_sigaction *ka,
2279 target_sigset_t *set, CPUSPARCState *env)
2280 {
2281 abi_ulong sf_addr;
2282 struct target_signal_frame *sf;
2283 int sigframe_size, err, i;
2284
2285 /* 1. Make sure everything is clean */
2286 //synchronize_user_stack();
2287
2288 sigframe_size = NF_ALIGNEDSZ;
2289 sf_addr = get_sigframe(ka, env, sigframe_size);
2290
2291 sf = lock_user(VERIFY_WRITE, sf_addr,
2292 sizeof(struct target_signal_frame), 0);
2293 if (!sf)
2294 goto sigsegv;
2295
2296 //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
2297 #if 0
2298 if (invalid_frame_pointer(sf, sigframe_size))
2299 goto sigill_and_return;
2300 #endif
2301 /* 2. Save the current process state */
2302 err = setup___siginfo(&sf->info, env, set->sig[0]);
2303 __put_user(0, &sf->extra_size);
2304
2305 //save_fpu_state(regs, &sf->fpu_state);
2306 //__put_user(&sf->fpu_state, &sf->fpu_save);
2307
2308 __put_user(set->sig[0], &sf->info.si_mask);
2309 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
2310 __put_user(set->sig[i + 1], &sf->extramask[i]);
2311 }
2312
2313 for (i = 0; i < 8; i++) {
2314 __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
2315 }
2316 for (i = 0; i < 8; i++) {
2317 __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
2318 }
2319 if (err)
2320 goto sigsegv;
2321
2322 /* 3. signal handler back-trampoline and parameters */
2323 env->regwptr[UREG_FP] = sf_addr;
2324 env->regwptr[UREG_I0] = sig;
2325 env->regwptr[UREG_I1] = sf_addr +
2326 offsetof(struct target_signal_frame, info);
2327 env->regwptr[UREG_I2] = sf_addr +
2328 offsetof(struct target_signal_frame, info);
2329
2330 /* 4. signal handler */
2331 env->pc = ka->_sa_handler;
2332 env->npc = (env->pc + 4);
2333 /* 5. return to kernel instructions */
2334 if (ka->sa_restorer)
2335 env->regwptr[UREG_I7] = ka->sa_restorer;
2336 else {
2337 uint32_t val32;
2338
2339 env->regwptr[UREG_I7] = sf_addr +
2340 offsetof(struct target_signal_frame, insns) - 2 * 4;
2341
2342 /* mov __NR_sigreturn, %g1 */
2343 val32 = 0x821020d8;
2344 __put_user(val32, &sf->insns[0]);
2345
2346 /* t 0x10 */
2347 val32 = 0x91d02010;
2348 __put_user(val32, &sf->insns[1]);
2349 if (err)
2350 goto sigsegv;
2351
2352 /* Flush instruction space. */
2353 //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
2354 // tb_flush(env);
2355 }
2356 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
2357 return;
2358 #if 0
2359 sigill_and_return:
2360 force_sig(TARGET_SIGILL);
2361 #endif
2362 sigsegv:
2363 //fprintf(stderr, "force_sig\n");
2364 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
2365 force_sig(TARGET_SIGSEGV);
2366 }
2367
2368 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2369 target_siginfo_t *info,
2370 target_sigset_t *set, CPUSPARCState *env)
2371 {
2372 fprintf(stderr, "setup_rt_frame: not implemented\n");
2373 }
2374
2375 long do_sigreturn(CPUSPARCState *env)
2376 {
2377 abi_ulong sf_addr;
2378 struct target_signal_frame *sf;
2379 uint32_t up_psr, pc, npc;
2380 target_sigset_t set;
2381 sigset_t host_set;
2382 int err=0, i;
2383
2384 sf_addr = env->regwptr[UREG_FP];
2385 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1))
2386 goto segv_and_exit;
2387 #if 0
2388 fprintf(stderr, "sigreturn\n");
2389 fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
2390 #endif
2391 //cpu_dump_state(env, stderr, fprintf, 0);
2392
2393 /* 1. Make sure we are not getting garbage from the user */
2394
2395 if (sf_addr & 3)
2396 goto segv_and_exit;
2397
2398 __get_user(pc, &sf->info.si_regs.pc);
2399 __get_user(npc, &sf->info.si_regs.npc);
2400
2401 if ((pc | npc) & 3)
2402 goto segv_and_exit;
2403
2404 /* 2. Restore the state */
2405 __get_user(up_psr, &sf->info.si_regs.psr);
2406
2407 /* User can only change condition codes and FPU enabling in %psr. */
2408 env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
2409 | (env->psr & ~(PSR_ICC /* | PSR_EF */));
2410
2411 env->pc = pc;
2412 env->npc = npc;
2413 __get_user(env->y, &sf->info.si_regs.y);
2414 for (i=0; i < 8; i++) {
2415 __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
2416 }
2417 for (i=0; i < 8; i++) {
2418 __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
2419 }
2420
2421 /* FIXME: implement FPU save/restore:
2422 * __get_user(fpu_save, &sf->fpu_save);
2423 * if (fpu_save)
2424 * err |= restore_fpu_state(env, fpu_save);
2425 */
2426
2427 /* This is pretty much atomic, no amount locking would prevent
2428 * the races which exist anyways.
2429 */
2430 __get_user(set.sig[0], &sf->info.si_mask);
2431 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2432 __get_user(set.sig[i], &sf->extramask[i - 1]);
2433 }
2434
2435 target_to_host_sigset_internal(&host_set, &set);
2436 do_sigprocmask(SIG_SETMASK, &host_set, NULL);
2437
2438 if (err)
2439 goto segv_and_exit;
2440 unlock_user_struct(sf, sf_addr, 0);
2441 return env->regwptr[0];
2442
2443 segv_and_exit:
2444 unlock_user_struct(sf, sf_addr, 0);
2445 force_sig(TARGET_SIGSEGV);
2446 }
2447
2448 long do_rt_sigreturn(CPUSPARCState *env)
2449 {
2450 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2451 return -TARGET_ENOSYS;
2452 }
2453
2454 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
2455 #define MC_TSTATE 0
2456 #define MC_PC 1
2457 #define MC_NPC 2
2458 #define MC_Y 3
2459 #define MC_G1 4
2460 #define MC_G2 5
2461 #define MC_G3 6
2462 #define MC_G4 7
2463 #define MC_G5 8
2464 #define MC_G6 9
2465 #define MC_G7 10
2466 #define MC_O0 11
2467 #define MC_O1 12
2468 #define MC_O2 13
2469 #define MC_O3 14
2470 #define MC_O4 15
2471 #define MC_O5 16
2472 #define MC_O6 17
2473 #define MC_O7 18
2474 #define MC_NGREG 19
2475
2476 typedef abi_ulong target_mc_greg_t;
2477 typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
2478
2479 struct target_mc_fq {
2480 abi_ulong *mcfq_addr;
2481 uint32_t mcfq_insn;
2482 };
2483
2484 struct target_mc_fpu {
2485 union {
2486 uint32_t sregs[32];
2487 uint64_t dregs[32];
2488 //uint128_t qregs[16];
2489 } mcfpu_fregs;
2490 abi_ulong mcfpu_fsr;
2491 abi_ulong mcfpu_fprs;
2492 abi_ulong mcfpu_gsr;
2493 struct target_mc_fq *mcfpu_fq;
2494 unsigned char mcfpu_qcnt;
2495 unsigned char mcfpu_qentsz;
2496 unsigned char mcfpu_enab;
2497 };
2498 typedef struct target_mc_fpu target_mc_fpu_t;
2499
2500 typedef struct {
2501 target_mc_gregset_t mc_gregs;
2502 target_mc_greg_t mc_fp;
2503 target_mc_greg_t mc_i7;
2504 target_mc_fpu_t mc_fpregs;
2505 } target_mcontext_t;
2506
2507 struct target_ucontext {
2508 struct target_ucontext *tuc_link;
2509 abi_ulong tuc_flags;
2510 target_sigset_t tuc_sigmask;
2511 target_mcontext_t tuc_mcontext;
2512 };
2513
2514 /* A V9 register window */
2515 struct target_reg_window {
2516 abi_ulong locals[8];
2517 abi_ulong ins[8];
2518 };
2519
2520 #define TARGET_STACK_BIAS 2047
2521
2522 /* {set, get}context() needed for 64-bit SparcLinux userland. */
2523 void sparc64_set_context(CPUSPARCState *env)
2524 {
2525 abi_ulong ucp_addr;
2526 struct target_ucontext *ucp;
2527 target_mc_gregset_t *grp;
2528 abi_ulong pc, npc, tstate;
2529 abi_ulong fp, i7, w_addr;
2530 unsigned int i;
2531
2532 ucp_addr = env->regwptr[UREG_I0];
2533 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1))
2534 goto do_sigsegv;
2535 grp = &ucp->tuc_mcontext.mc_gregs;
2536 __get_user(pc, &((*grp)[MC_PC]));
2537 __get_user(npc, &((*grp)[MC_NPC]));
2538 if ((pc | npc) & 3)
2539 goto do_sigsegv;
2540 if (env->regwptr[UREG_I1]) {
2541 target_sigset_t target_set;
2542 sigset_t set;
2543
2544 if (TARGET_NSIG_WORDS == 1) {
2545 __get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0]);
2546 } else {
2547 abi_ulong *src, *dst;
2548 src = ucp->tuc_sigmask.sig;
2549 dst = target_set.sig;
2550 for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) {
2551 __get_user(*dst, src);
2552 }
2553 }
2554 target_to_host_sigset_internal(&set, &target_set);
2555 do_sigprocmask(SIG_SETMASK, &set, NULL);
2556 }
2557 env->pc = pc;
2558 env->npc = npc;
2559 __get_user(env->y, &((*grp)[MC_Y]));
2560 __get_user(tstate, &((*grp)[MC_TSTATE]));
2561 env->asi = (tstate >> 24) & 0xff;
2562 cpu_put_ccr(env, tstate >> 32);
2563 cpu_put_cwp64(env, tstate & 0x1f);
2564 __get_user(env->gregs[1], (&(*grp)[MC_G1]));
2565 __get_user(env->gregs[2], (&(*grp)[MC_G2]));
2566 __get_user(env->gregs[3], (&(*grp)[MC_G3]));
2567 __get_user(env->gregs[4], (&(*grp)[MC_G4]));
2568 __get_user(env->gregs[5], (&(*grp)[MC_G5]));
2569 __get_user(env->gregs[6], (&(*grp)[MC_G6]));
2570 __get_user(env->gregs[7], (&(*grp)[MC_G7]));
2571 __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
2572 __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
2573 __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
2574 __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
2575 __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
2576 __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
2577 __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
2578 __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
2579
2580 __get_user(fp, &(ucp->tuc_mcontext.mc_fp));
2581 __get_user(i7, &(ucp->tuc_mcontext.mc_i7));
2582
2583 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2584 if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2585 abi_ulong) != 0)
2586 goto do_sigsegv;
2587 if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2588 abi_ulong) != 0)
2589 goto do_sigsegv;
2590 /* FIXME this does not match how the kernel handles the FPU in
2591 * its sparc64_set_context implementation. In particular the FPU
2592 * is only restored if fenab is non-zero in:
2593 * __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab));
2594 */
2595 __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs));
2596 {
2597 uint32_t *src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2598 for (i = 0; i < 64; i++, src++) {
2599 if (i & 1) {
2600 __get_user(env->fpr[i/2].l.lower, src);
2601 } else {
2602 __get_user(env->fpr[i/2].l.upper, src);
2603 }
2604 }
2605 }
2606 __get_user(env->fsr,
2607 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr));
2608 __get_user(env->gsr,
2609 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr));
2610 unlock_user_struct(ucp, ucp_addr, 0);
2611 return;
2612 do_sigsegv:
2613 unlock_user_struct(ucp, ucp_addr, 0);
2614 force_sig(TARGET_SIGSEGV);
2615 }
2616
2617 void sparc64_get_context(CPUSPARCState *env)
2618 {
2619 abi_ulong ucp_addr;
2620 struct target_ucontext *ucp;
2621 target_mc_gregset_t *grp;
2622 target_mcontext_t *mcp;
2623 abi_ulong fp, i7, w_addr;
2624 int err;
2625 unsigned int i;
2626 target_sigset_t target_set;
2627 sigset_t set;
2628
2629 ucp_addr = env->regwptr[UREG_I0];
2630 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0))
2631 goto do_sigsegv;
2632
2633 mcp = &ucp->tuc_mcontext;
2634 grp = &mcp->mc_gregs;
2635
2636 /* Skip over the trap instruction, first. */
2637 env->pc = env->npc;
2638 env->npc += 4;
2639
2640 err = 0;
2641
2642 do_sigprocmask(0, NULL, &set);
2643 host_to_target_sigset_internal(&target_set, &set);
2644 if (TARGET_NSIG_WORDS == 1) {
2645 __put_user(target_set.sig[0],
2646 (abi_ulong *)&ucp->tuc_sigmask);
2647 } else {
2648 abi_ulong *src, *dst;
2649 src = target_set.sig;
2650 dst = ucp->tuc_sigmask.sig;
2651 for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) {
2652 __put_user(*src, dst);
2653 }
2654 if (err)
2655 goto do_sigsegv;
2656 }
2657
2658 /* XXX: tstate must be saved properly */
2659 // __put_user(env->tstate, &((*grp)[MC_TSTATE]));
2660 __put_user(env->pc, &((*grp)[MC_PC]));
2661 __put_user(env->npc, &((*grp)[MC_NPC]));
2662 __put_user(env->y, &((*grp)[MC_Y]));
2663 __put_user(env->gregs[1], &((*grp)[MC_G1]));
2664 __put_user(env->gregs[2], &((*grp)[MC_G2]));
2665 __put_user(env->gregs[3], &((*grp)[MC_G3]));
2666 __put_user(env->gregs[4], &((*grp)[MC_G4]));
2667 __put_user(env->gregs[5], &((*grp)[MC_G5]));
2668 __put_user(env->gregs[6], &((*grp)[MC_G6]));
2669 __put_user(env->gregs[7], &((*grp)[MC_G7]));
2670 __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
2671 __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
2672 __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
2673 __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
2674 __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
2675 __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
2676 __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
2677 __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
2678
2679 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2680 fp = i7 = 0;
2681 if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2682 abi_ulong) != 0)
2683 goto do_sigsegv;
2684 if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2685 abi_ulong) != 0)
2686 goto do_sigsegv;
2687 __put_user(fp, &(mcp->mc_fp));
2688 __put_user(i7, &(mcp->mc_i7));
2689
2690 {
2691 uint32_t *dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2692 for (i = 0; i < 64; i++, dst++) {
2693 if (i & 1) {
2694 __put_user(env->fpr[i/2].l.lower, dst);
2695 } else {
2696 __put_user(env->fpr[i/2].l.upper, dst);
2697 }
2698 }
2699 }
2700 __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
2701 __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
2702 __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
2703
2704 if (err)
2705 goto do_sigsegv;
2706 unlock_user_struct(ucp, ucp_addr, 1);
2707 return;
2708 do_sigsegv:
2709 unlock_user_struct(ucp, ucp_addr, 1);
2710 force_sig(TARGET_SIGSEGV);
2711 }
2712 #endif
2713 #elif defined(TARGET_MIPS) || defined(TARGET_MIPS64)
2714
2715 # if defined(TARGET_ABI_MIPSO32)
2716 struct target_sigcontext {
2717 uint32_t sc_regmask; /* Unused */
2718 uint32_t sc_status;
2719 uint64_t sc_pc;
2720 uint64_t sc_regs[32];
2721 uint64_t sc_fpregs[32];
2722 uint32_t sc_ownedfp; /* Unused */
2723 uint32_t sc_fpc_csr;
2724 uint32_t sc_fpc_eir; /* Unused */
2725 uint32_t sc_used_math;
2726 uint32_t sc_dsp; /* dsp status, was sc_ssflags */
2727 uint32_t pad0;
2728 uint64_t sc_mdhi;
2729 uint64_t sc_mdlo;
2730 target_ulong sc_hi1; /* Was sc_cause */
2731 target_ulong sc_lo1; /* Was sc_badvaddr */
2732 target_ulong sc_hi2; /* Was sc_sigset[4] */
2733 target_ulong sc_lo2;
2734 target_ulong sc_hi3;
2735 target_ulong sc_lo3;
2736 };
2737 # else /* N32 || N64 */
2738 struct target_sigcontext {
2739 uint64_t sc_regs[32];
2740 uint64_t sc_fpregs[32];
2741 uint64_t sc_mdhi;
2742 uint64_t sc_hi1;
2743 uint64_t sc_hi2;
2744 uint64_t sc_hi3;
2745 uint64_t sc_mdlo;
2746 uint64_t sc_lo1;
2747 uint64_t sc_lo2;
2748 uint64_t sc_lo3;
2749 uint64_t sc_pc;
2750 uint32_t sc_fpc_csr;
2751 uint32_t sc_used_math;
2752 uint32_t sc_dsp;
2753 uint32_t sc_reserved;
2754 };
2755 # endif /* O32 */
2756
2757 struct sigframe {
2758 uint32_t sf_ass[4]; /* argument save space for o32 */
2759 uint32_t sf_code[2]; /* signal trampoline */
2760 struct target_sigcontext sf_sc;
2761 target_sigset_t sf_mask;
2762 };
2763
2764 struct target_ucontext {
2765 target_ulong tuc_flags;
2766 target_ulong tuc_link;
2767 target_stack_t tuc_stack;
2768 target_ulong pad0;
2769 struct target_sigcontext tuc_mcontext;
2770 target_sigset_t tuc_sigmask;
2771 };
2772
2773 struct target_rt_sigframe {
2774 uint32_t rs_ass[4]; /* argument save space for o32 */
2775 uint32_t rs_code[2]; /* signal trampoline */
2776 struct target_siginfo rs_info;
2777 struct target_ucontext rs_uc;
2778 };
2779
2780 /* Install trampoline to jump back from signal handler */
2781 static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
2782 {
2783 int err = 0;
2784
2785 /*
2786 * Set up the return code ...
2787 *
2788 * li v0, __NR__foo_sigreturn
2789 * syscall
2790 */
2791
2792 __put_user(0x24020000 + syscall, tramp + 0);
2793 __put_user(0x0000000c , tramp + 1);
2794 return err;
2795 }
2796
2797 static inline void setup_sigcontext(CPUMIPSState *regs,
2798 struct target_sigcontext *sc)
2799 {
2800 int i;
2801
2802 __put_user(exception_resume_pc(regs), &sc->sc_pc);
2803 regs->hflags &= ~MIPS_HFLAG_BMASK;
2804
2805 __put_user(0, &sc->sc_regs[0]);
2806 for (i = 1; i < 32; ++i) {
2807 __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
2808 }
2809
2810 __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2811 __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2812
2813 /* Rather than checking for dsp existence, always copy. The storage
2814 would just be garbage otherwise. */
2815 __put_user(regs->active_tc.HI[1], &sc->sc_hi1);
2816 __put_user(regs->active_tc.HI[2], &sc->sc_hi2);
2817 __put_user(regs->active_tc.HI[3], &sc->sc_hi3);
2818 __put_user(regs->active_tc.LO[1], &sc->sc_lo1);
2819 __put_user(regs->active_tc.LO[2], &sc->sc_lo2);
2820 __put_user(regs->active_tc.LO[3], &sc->sc_lo3);
2821 {
2822 uint32_t dsp = cpu_rddsp(0x3ff, regs);
2823 __put_user(dsp, &sc->sc_dsp);
2824 }
2825
2826 __put_user(1, &sc->sc_used_math);
2827
2828 for (i = 0; i < 32; ++i) {
2829 __put_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
2830 }
2831 }
2832
2833 static inline void
2834 restore_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc)
2835 {
2836 int i;
2837
2838 __get_user(regs->CP0_EPC, &sc->sc_pc);
2839
2840 __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2841 __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2842
2843 for (i = 1; i < 32; ++i) {
2844 __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
2845 }
2846
2847 __get_user(regs->active_tc.HI[1], &sc->sc_hi1);
2848 __get_user(regs->active_tc.HI[2], &sc->sc_hi2);
2849 __get_user(regs->active_tc.HI[3], &sc->sc_hi3);
2850 __get_user(regs->active_tc.LO[1], &sc->sc_lo1);
2851 __get_user(regs->active_tc.LO[2], &sc->sc_lo2);
2852 __get_user(regs->active_tc.LO[3], &sc->sc_lo3);
2853 {
2854 uint32_t dsp;
2855 __get_user(dsp, &sc->sc_dsp);
2856 cpu_wrdsp(dsp, 0x3ff, regs);
2857 }
2858
2859 for (i = 0; i < 32; ++i) {
2860 __get_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
2861 }
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 setup_sigcontext(regs, &frame->sf_sc);
2915
2916 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2917 __put_user(set->sig[i], &frame->sf_mask.sig[i]);
2918 }
2919
2920 /*
2921 * Arguments to signal handler:
2922 *
2923 * a0 = signal number
2924 * a1 = 0 (should be cause)
2925 * a2 = pointer to struct sigcontext
2926 *
2927 * $25 and PC point to the signal handler, $29 points to the
2928 * struct sigframe.
2929 */
2930 regs->active_tc.gpr[ 4] = sig;
2931 regs->active_tc.gpr[ 5] = 0;
2932 regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
2933 regs->active_tc.gpr[29] = frame_addr;
2934 regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
2935 /* The original kernel code sets CP0_EPC to the handler
2936 * since it returns to userland using eret
2937 * we cannot do this here, and we must set PC directly */
2938 regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
2939 mips_set_hflags_isa_mode_from_pc(regs);
2940 unlock_user_struct(frame, frame_addr, 1);
2941 return;
2942
2943 give_sigsegv:
2944 force_sig(TARGET_SIGSEGV/*, current*/);
2945 }
2946
2947 long do_sigreturn(CPUMIPSState *regs)
2948 {
2949 struct sigframe *frame;
2950 abi_ulong frame_addr;
2951 sigset_t blocked;
2952 target_sigset_t target_set;
2953 int i;
2954
2955 #if defined(DEBUG_SIGNAL)
2956 fprintf(stderr, "do_sigreturn\n");
2957 #endif
2958 frame_addr = regs->active_tc.gpr[29];
2959 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2960 goto badframe;
2961
2962 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2963 __get_user(target_set.sig[i], &frame->sf_mask.sig[i]);
2964 }
2965
2966 target_to_host_sigset_internal(&blocked, &target_set);
2967 do_sigprocmask(SIG_SETMASK, &blocked, NULL);
2968
2969 restore_sigcontext(regs, &frame->sf_sc);
2970
2971 #if 0
2972 /*
2973 * Don't let your children do this ...
2974 */
2975 __asm__ __volatile__(
2976 "move\t$29, %0\n\t"
2977 "j\tsyscall_exit"
2978 :/* no outputs */
2979 :"r" (&regs));
2980 /* Unreached */
2981 #endif
2982
2983 regs->active_tc.PC = regs->CP0_EPC;
2984 mips_set_hflags_isa_mode_from_pc(regs);
2985 /* I am not sure this is right, but it seems to work
2986 * maybe a problem with nested signals ? */
2987 regs->CP0_EPC = 0;
2988 return -TARGET_QEMU_ESIGRETURN;
2989
2990 badframe:
2991 force_sig(TARGET_SIGSEGV/*, current*/);
2992 return 0;
2993 }
2994 # endif /* O32 */
2995
2996 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2997 target_siginfo_t *info,
2998 target_sigset_t *set, CPUMIPSState *env)
2999 {
3000 struct target_rt_sigframe *frame;
3001 abi_ulong frame_addr;
3002 int i;
3003
3004 frame_addr = get_sigframe(ka, env, sizeof(*frame));
3005 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3006 goto give_sigsegv;
3007
3008 install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn);
3009
3010 copy_siginfo_to_user(&frame->rs_info, info);
3011
3012 __put_user(0, &frame->rs_uc.tuc_flags);
3013 __put_user(0, &frame->rs_uc.tuc_link);
3014 __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp);
3015 __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size);
3016 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
3017 &frame->rs_uc.tuc_stack.ss_flags);
3018
3019 setup_sigcontext(env, &frame->rs_uc.tuc_mcontext);
3020
3021 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
3022 __put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]);
3023 }
3024
3025 /*
3026 * Arguments to signal handler:
3027 *
3028 * a0 = signal number
3029 * a1 = pointer to siginfo_t
3030 * a2 = pointer to struct ucontext
3031 *
3032 * $25 and PC point to the signal handler, $29 points to the
3033 * struct sigframe.
3034 */
3035 env->active_tc.gpr[ 4] = sig;
3036 env->active_tc.gpr[ 5] = frame_addr
3037 + offsetof(struct target_rt_sigframe, rs_info);
3038 env->active_tc.gpr[ 6] = frame_addr
3039 + offsetof(struct target_rt_sigframe, rs_uc);
3040 env->active_tc.gpr[29] = frame_addr;
3041 env->active_tc.gpr[31] = frame_addr
3042 + offsetof(struct target_rt_sigframe, rs_code);
3043 /* The original kernel code sets CP0_EPC to the handler
3044 * since it returns to userland using eret
3045 * we cannot do this here, and we must set PC directly */
3046 env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
3047 mips_set_hflags_isa_mode_from_pc(env);
3048 unlock_user_struct(frame, frame_addr, 1);
3049 return;
3050
3051 give_sigsegv:
3052 unlock_user_struct(frame, frame_addr, 1);
3053 force_sig(TARGET_SIGSEGV/*, current*/);
3054 }
3055
3056 long do_rt_sigreturn(CPUMIPSState *env)
3057 {
3058 struct target_rt_sigframe *frame;
3059 abi_ulong frame_addr;
3060 sigset_t blocked;
3061
3062 #if defined(DEBUG_SIGNAL)
3063 fprintf(stderr, "do_rt_sigreturn\n");
3064 #endif
3065 frame_addr = env->active_tc.gpr[29];
3066 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3067 goto badframe;
3068
3069 target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask);
3070 do_sigprocmask(SIG_SETMASK, &blocked, NULL);
3071
3072 restore_sigcontext(env, &frame->rs_uc.tuc_mcontext);
3073
3074 if (do_sigaltstack(frame_addr +
3075 offsetof(struct target_rt_sigframe, rs_uc.tuc_stack),
3076 0, get_sp_from_cpustate(env)) == -EFAULT)
3077 goto badframe;
3078
3079 env->active_tc.PC = env->CP0_EPC;
3080 mips_set_hflags_isa_mode_from_pc(env);
3081 /* I am not sure this is right, but it seems to work
3082 * maybe a problem with nested signals ? */
3083 env->CP0_EPC = 0;
3084 return -TARGET_QEMU_ESIGRETURN;
3085
3086 badframe:
3087 force_sig(TARGET_SIGSEGV/*, current*/);
3088 return 0;
3089 }
3090
3091 #elif defined(TARGET_SH4)
3092
3093 /*
3094 * code and data structures from linux kernel:
3095 * include/asm-sh/sigcontext.h
3096 * arch/sh/kernel/signal.c
3097 */
3098
3099 struct target_sigcontext {
3100 target_ulong oldmask;
3101
3102 /* CPU registers */
3103 target_ulong sc_gregs[16];
3104 target_ulong sc_pc;
3105 target_ulong sc_pr;
3106 target_ulong sc_sr;
3107 target_ulong sc_gbr;
3108 target_ulong sc_mach;
3109 target_ulong sc_macl;
3110
3111 /* FPU registers */
3112 target_ulong sc_fpregs[16];
3113 target_ulong sc_xfpregs[16];
3114 unsigned int sc_fpscr;
3115 unsigned int sc_fpul;
3116 unsigned int sc_ownedfp;
3117 };
3118
3119 struct target_sigframe
3120 {
3121 struct target_sigcontext sc;
3122 target_ulong extramask[TARGET_NSIG_WORDS-1];
3123 uint16_t retcode[3];
3124 };
3125
3126
3127 struct target_ucontext {
3128 target_ulong tuc_flags;
3129 struct target_ucontext *tuc_link;
3130 target_stack_t tuc_stack;
3131 struct target_sigcontext tuc_mcontext;
3132 target_sigset_t tuc_sigmask; /* mask last for extensibility */
3133 };
3134
3135 struct target_rt_sigframe
3136 {
3137 struct target_siginfo info;
3138 struct target_ucontext uc;
3139 uint16_t retcode[3];
3140 };
3141
3142
3143 #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
3144 #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
3145
3146 static abi_ulong get_sigframe(struct target_sigaction *ka,
3147 unsigned long sp, size_t frame_size)
3148 {
3149 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
3150 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3151 }
3152
3153 return (sp - frame_size) & -8ul;
3154 }
3155
3156 static void setup_sigcontext(struct target_sigcontext *sc,
3157 CPUSH4State *regs, unsigned long mask)
3158 {
3159 int i;
3160
3161 #define COPY(x) __put_user(regs->x, &sc->sc_##x)
3162 COPY(gregs[0]); COPY(gregs[1]);
3163 COPY(gregs[2]); COPY(gregs[3]);
3164 COPY(gregs[4]); COPY(gregs[5]);
3165 COPY(gregs[6]); COPY(gregs[7]);
3166 COPY(gregs[8]); COPY(gregs[9]);
3167 COPY(gregs[10]); COPY(gregs[11]);
3168 COPY(gregs[12]); COPY(gregs[13]);
3169 COPY(gregs[14]); COPY(gregs[15]);
3170 COPY(gbr); COPY(mach);
3171 COPY(macl); COPY(pr);
3172 COPY(sr); COPY(pc);
3173 #undef COPY
3174
3175 for (i=0; i<16; i++) {
3176 __put_user(regs->fregs[i], &sc->sc_fpregs[i]);
3177 }
3178 __put_user(regs->fpscr, &sc->sc_fpscr);
3179 __put_user(regs->fpul, &sc->sc_fpul);
3180
3181 /* non-iBCS2 extensions.. */
3182 __put_user(mask, &sc->oldmask);
3183 }
3184
3185 static void restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc,
3186 target_ulong *r0_p)
3187 {
3188 int i;
3189
3190 #define COPY(x) __get_user(regs->x, &sc->sc_##x)
3191 COPY(gregs[1]);
3192 COPY(gregs[2]); COPY(gregs[3]);
3193 COPY(gregs[4]); COPY(gregs[5]);
3194 COPY(gregs[6]); COPY(gregs[7]);
3195 COPY(gregs[8]); COPY(gregs[9]);
3196 COPY(gregs[10]); COPY(gregs[11]);
3197 COPY(gregs[12]); COPY(gregs[13]);
3198 COPY(gregs[14]); COPY(gregs[15]);
3199 COPY(gbr); COPY(mach);
3200 COPY(macl); COPY(pr);
3201 COPY(sr); COPY(pc);
3202 #undef COPY
3203
3204 for (i=0; i<16; i++) {
3205 __get_user(regs->fregs[i], &sc->sc_fpregs[i]);
3206 }
3207 __get_user(regs->fpscr, &sc->sc_fpscr);
3208 __get_user(regs->fpul, &sc->sc_fpul);
3209
3210 regs->tra = -1; /* disable syscall checks */
3211 __get_user(*r0_p, &sc->sc_gregs[0]);
3212 }
3213
3214 static void setup_frame(int sig, struct target_sigaction *ka,
3215 target_sigset_t *set, CPUSH4State *regs)
3216 {
3217 struct target_sigframe *frame;
3218 abi_ulong frame_addr;
3219 int i;
3220 int err = 0;
3221 int signal;
3222
3223 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
3224 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3225 goto give_sigsegv;
3226
3227 signal = current_exec_domain_sig(sig);
3228
3229 setup_sigcontext(&frame->sc, regs, set->sig[0]);
3230
3231 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
3232 __put_user(set->sig[i + 1], &frame->extramask[i]);
3233 }
3234
3235 /* Set up to return from userspace. If provided, use a stub
3236 already in userspace. */
3237 if (ka->sa_flags & TARGET_SA_RESTORER) {
3238 regs->pr = (unsigned long) ka->sa_restorer;
3239 } else {
3240 /* Generate return code (system call to sigreturn) */
3241 __put_user(MOVW(2), &frame->retcode[0]);
3242 __put_user(TRAP_NOARG, &frame->retcode[1]);
3243 __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
3244 regs->pr = (unsigned long) frame->retcode;
3245 }
3246
3247 if (err)
3248 goto give_sigsegv;
3249
3250 /* Set up registers for signal handler */
3251 regs->gregs[15] = frame_addr;
3252 regs->gregs[4] = signal; /* Arg for signal handler */
3253 regs->gregs[5] = 0;
3254 regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc);
3255 regs->pc = (unsigned long) ka->_sa_handler;
3256
3257 unlock_user_struct(frame, frame_addr, 1);
3258 return;
3259
3260 give_sigsegv:
3261 unlock_user_struct(frame, frame_addr, 1);
3262 force_sig(TARGET_SIGSEGV);
3263 }
3264
3265 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3266 target_siginfo_t *info,
3267 target_sigset_t *set, CPUSH4State *regs)
3268 {
3269 struct target_rt_sigframe *frame;
3270 abi_ulong frame_addr;
3271 int i;
3272 int err = 0;
3273 int signal;
3274
3275 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
3276 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3277 goto give_sigsegv;
3278
3279 signal = current_exec_domain_sig(sig);
3280
3281 copy_siginfo_to_user(&frame->info, info);
3282
3283 /* Create the ucontext. */
3284 __put_user(0, &frame->uc.tuc_flags);
3285 __put_user(0, (unsigned long *)&frame->uc.tuc_link);
3286 __put_user((unsigned long)target_sigaltstack_used.ss_sp,
3287 &frame->uc.tuc_stack.ss_sp);
3288 __put_user(sas_ss_flags(regs->gregs[15]),
3289 &frame->uc.tuc_stack.ss_flags);
3290 __put_user(target_sigaltstack_used.ss_size,
3291 &frame->uc.tuc_stack.ss_size);
3292 setup_sigcontext(&frame->uc.tuc_mcontext,
3293 regs, set->sig[0]);
3294 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
3295 __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
3296 }
3297
3298 /* Set up to return from userspace. If provided, use a stub
3299 already in userspace. */
3300 if (ka->sa_flags & TARGET_SA_RESTORER) {
3301 regs->pr = (unsigned long) ka->sa_restorer;
3302 } else {
3303 /* Generate return code (system call to sigreturn) */
3304 __put_user(MOVW(2), &frame->retcode[0]);
3305 __put_user(TRAP_NOARG, &frame->retcode[1]);
3306 __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
3307 regs->pr = (unsigned long) frame->retcode;
3308 }
3309
3310 if (err)
3311 goto give_sigsegv;
3312
3313 /* Set up registers for signal handler */
3314 regs->gregs[15] = frame_addr;
3315 regs->gregs[4] = signal; /* Arg for signal handler */
3316 regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info);
3317 regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc);
3318 regs->pc = (unsigned long) ka->_sa_handler;
3319
3320 unlock_user_struct(frame, frame_addr, 1);
3321 return;
3322
3323 give_sigsegv:
3324 unlock_user_struct(frame, frame_addr, 1);
3325 force_sig(TARGET_SIGSEGV);
3326 }
3327
3328 long do_sigreturn(CPUSH4State *regs)
3329 {
3330 struct target_sigframe *frame;
3331 abi_ulong frame_addr;
3332 sigset_t blocked;
3333 target_sigset_t target_set;
3334 target_ulong r0;
3335 int i;
3336 int err = 0;
3337
3338 #if defined(DEBUG_SIGNAL)
3339 fprintf(stderr, "do_sigreturn\n");
3340 #endif
3341 frame_addr = regs->gregs[15];
3342 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3343 goto badframe;
3344
3345 __get_user(target_set.sig[0], &frame->sc.oldmask);
3346 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3347 __get_user(target_set.sig[i], &frame->extramask[i - 1]);
3348 }
3349
3350 if (err)
3351 goto badframe;
3352
3353 target_to_host_sigset_internal(&blocked, &target_set);
3354 do_sigprocmask(SIG_SETMASK, &blocked, NULL);
3355
3356 restore_sigcontext(regs, &frame->sc, &r0);
3357
3358 unlock_user_struct(frame, frame_addr, 0);
3359 return r0;
3360
3361 badframe:
3362 unlock_user_struct(frame, frame_addr, 0);
3363 force_sig(TARGET_SIGSEGV);
3364 return 0;
3365 }
3366
3367 long do_rt_sigreturn(CPUSH4State *regs)
3368 {
3369 struct target_rt_sigframe *frame;
3370 abi_ulong frame_addr;
3371 sigset_t blocked;
3372 target_ulong r0;
3373
3374 #if defined(DEBUG_SIGNAL)
3375 fprintf(stderr, "do_rt_sigreturn\n");
3376 #endif
3377 frame_addr = regs->gregs[15];
3378 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
3379 goto badframe;
3380
3381 target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask);
3382 do_sigprocmask(SIG_SETMASK, &blocked, NULL);
3383
3384 restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0);
3385
3386 if (do_sigaltstack(frame_addr +
3387 offsetof(struct target_rt_sigframe, uc.tuc_stack),
3388 0, get_sp_from_cpustate(regs)) == -EFAULT)
3389 goto badframe;
3390
3391 unlock_user_struct(frame, frame_addr, 0);
3392 return r0;
3393
3394 badframe:
3395 unlock_user_struct(frame, frame_addr, 0);
3396 force_sig(TARGET_SIGSEGV);
3397 return 0;
3398 }
3399 #elif defined(TARGET_MICROBLAZE)
3400
3401 struct target_sigcontext {
3402 struct target_pt_regs regs; /* needs to be first */
3403 uint32_t oldmask;
3404 };
3405
3406 struct target_stack_t {
3407 abi_ulong ss_sp;
3408 int ss_flags;
3409 unsigned int ss_size;
3410 };
3411
3412 struct target_ucontext {
3413 abi_ulong tuc_flags;
3414 abi_ulong tuc_link;
3415 struct target_stack_t tuc_stack;
3416 struct target_sigcontext tuc_mcontext;
3417 uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1];
3418 };
3419
3420 /* Signal frames. */
3421 struct target_signal_frame {
3422 struct target_ucontext uc;
3423 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3424 uint32_t tramp[2];
3425 };
3426
3427 struct rt_signal_frame {
3428 siginfo_t info;
3429 struct ucontext uc;
3430 uint32_t tramp[2];
3431 };
3432
3433 static void setup_sigcontext(struct target_sigcontext *sc, CPUMBState *env)
3434 {
3435 __put_user(env->regs[0], &sc->regs.r0);
3436 __put_user(env->regs[1], &sc->regs.r1);
3437 __put_user(env->regs[2], &sc->regs.r2);
3438 __put_user(env->regs[3], &sc->regs.r3);
3439 __put_user(env->regs[4], &sc->regs.r4);
3440 __put_user(env->regs[5], &sc->regs.r5);
3441 __put_user(env->regs[6], &sc->regs.r6);
3442 __put_user(env->regs[7], &sc->regs.r7);
3443 __put_user(env->regs[8], &sc->regs.r8);
3444 __put_user(env->regs[9], &sc->regs.r9);
3445 __put_user(env->regs[10], &sc->regs.r10);
3446 __put_user(env->regs[11], &sc->regs.r11);
3447 __put_user(env->regs[12], &sc->regs.r12);
3448 __put_user(env->regs[13], &sc->regs.r13);
3449 __put_user(env->regs[14], &sc->regs.r14);
3450 __put_user(env->regs[15], &sc->regs.r15);
3451 __put_user(env->regs[16], &sc->regs.r16);
3452 __put_user(env->regs[17], &sc->regs.r17);
3453 __put_user(env->regs[18], &sc->regs.r18);
3454 __put_user(env->regs[19], &sc->regs.r19);
3455 __put_user(env->regs[20], &sc->regs.r20);
3456 __put_user(env->regs[21], &sc->regs.r21);
3457 __put_user(env->regs[22], &sc->regs.r22);
3458 __put_user(env->regs[23], &sc->regs.r23);
3459 __put_user(env->regs[24], &sc->regs.r24);
3460 __put_user(env->regs[25], &sc->regs.r25);
3461 __put_user(env->regs[26], &sc->regs.r26);
3462 __put_user(env->regs[27], &sc->regs.r27);
3463 __put_user(env->regs[28], &sc->regs.r28);
3464 __put_user(env->regs[29], &sc->regs.r29);
3465 __put_user(env->regs[30], &sc->regs.r30);
3466 __put_user(env->regs[31], &sc->regs.r31);
3467 __put_user(env->sregs[SR_PC], &sc->regs.pc);
3468 }
3469
3470 static void restore_sigcontext(struct target_sigcontext *sc, CPUMBState *env)
3471 {
3472 __get_user(env->regs[0], &sc->regs.r0);
3473 __get_user(env->regs[1], &sc->regs.r1);
3474 __get_user(env->regs[2], &sc->regs.r2);
3475 __get_user(env->regs[3], &sc->regs.r3);
3476 __get_user(env->regs[4], &sc->regs.r4);
3477 __get_user(env->regs[5], &sc->regs.r5);
3478 __get_user(env->regs[6], &sc->regs.r6);
3479 __get_user(env->regs[7], &sc->regs.r7);
3480 __get_user(env->regs[8], &sc->regs.r8);
3481 __get_user(env->regs[9], &sc->regs.r9);
3482 __get_user(env->regs[10], &sc->regs.r10);
3483 __get_user(env->regs[11], &sc->regs.r11);
3484 __get_user(env->regs[12], &sc->regs.r12);
3485 __get_user(env->regs[13], &sc->regs.r13);
3486 __get_user(env->regs[14], &sc->regs.r14);
3487 __get_user(env->regs[15], &sc->regs.r15);
3488 __get_user(env->regs[16], &sc->regs.r16);
3489 __get_user(env->regs[17], &sc->regs.r17);
3490 __get_user(env->regs[18], &sc->regs.r18);
3491 __get_user(env->regs[19], &sc->regs.r19);
3492 __get_user(env->regs[20], &sc->regs.r20);
3493 __get_user(env->regs[21], &sc->regs.r21);
3494 __get_user(env->regs[22], &sc->regs.r22);
3495 __get_user(env->regs[23], &sc->regs.r23);
3496 __get_user(env->regs[24], &sc->regs.r24);
3497 __get_user(env->regs[25], &sc->regs.r25);
3498 __get_user(env->regs[26], &sc->regs.r26);
3499 __get_user(env->regs[27], &sc->regs.r27);
3500 __get_user(env->regs[28], &sc->regs.r28);
3501 __get_user(env->regs[29], &sc->regs.r29);
3502 __get_user(env->regs[30], &sc->regs.r30);
3503 __get_user(env->regs[31], &sc->regs.r31);
3504 __get_user(env->sregs[SR_PC], &sc->regs.pc);
3505 }
3506
3507 static abi_ulong get_sigframe(struct target_sigaction *ka,
3508 CPUMBState *env, int frame_size)
3509 {
3510 abi_ulong sp = env->regs[1];
3511
3512 if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !on_sig_stack(sp)) {
3513 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3514 }
3515
3516 return ((sp - frame_size) & -8UL);
3517 }
3518
3519 static void setup_frame(int sig, struct target_sigaction *ka,
3520 target_sigset_t *set, CPUMBState *env)
3521 {
3522 struct target_signal_frame *frame;
3523 abi_ulong frame_addr;
3524 int i;
3525
3526 frame_addr = get_sigframe(ka, env, sizeof *frame);
3527 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3528 goto badframe;
3529
3530 /* Save the mask. */
3531 __put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask);
3532
3533 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3534 __put_user(set->sig[i], &frame->extramask[i - 1]);
3535 }
3536
3537 setup_sigcontext(&frame->uc.tuc_mcontext, env);
3538
3539 /* Set up to return from userspace. If provided, use a stub
3540 already in userspace. */
3541 /* minus 8 is offset to cater for "rtsd r15,8" offset */
3542 if (ka->sa_flags & TARGET_SA_RESTORER) {
3543 env->regs[15] = ((unsigned long)ka->sa_restorer)-8;
3544 } else {
3545 uint32_t t;
3546 /* Note, these encodings are _big endian_! */
3547 /* addi r12, r0, __NR_sigreturn */
3548 t = 0x31800000UL | TARGET_NR_sigreturn;
3549 __put_user(t, frame->tramp + 0);
3550 /* brki r14, 0x8 */
3551 t = 0xb9cc0008UL;
3552 __put_user(t, frame->tramp + 1);
3553
3554 /* Return from sighandler will jump to the tramp.
3555 Negative 8 offset because return is rtsd r15, 8 */
3556 env->regs[15] = ((unsigned long)frame->tramp) - 8;
3557 }
3558
3559 /* Set up registers for signal handler */
3560 env->regs[1] = frame_addr;
3561 /* Signal handler args: */
3562 env->regs[5] = sig; /* Arg 0: signum */
3563 env->regs[6] = 0;
3564 /* arg 1: sigcontext */
3565 env->regs[7] = frame_addr += offsetof(typeof(*frame), uc);
3566
3567 /* Offset of 4 to handle microblaze rtid r14, 0 */
3568 env->sregs[SR_PC] = (unsigned long)ka->_sa_handler;
3569
3570 unlock_user_struct(frame, frame_addr, 1);
3571 return;
3572 badframe:
3573 force_sig(TARGET_SIGSEGV);
3574 }
3575
3576 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3577 target_siginfo_t *info,
3578 target_sigset_t *set, CPUMBState *env)
3579 {
3580 fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n");
3581 }
3582
3583 long do_sigreturn(CPUMBState *env)
3584 {
3585 struct target_signal_frame *frame;
3586 abi_ulong frame_addr;
3587 target_sigset_t target_set;
3588 sigset_t set;
3589 int i;
3590
3591 frame_addr = env->regs[R_SP];
3592 /* Make sure the guest isn't playing games. */
3593 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3594 goto badframe;
3595
3596 /* Restore blocked signals */
3597 __get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask);
3598 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3599 __get_user(target_set.sig[i], &frame->extramask[i - 1]);
3600 }
3601 target_to_host_sigset_internal(&set, &target_set);
3602 do_sigprocmask(SIG_SETMASK, &set, NULL);
3603
3604 restore_sigcontext(&frame->uc.tuc_mcontext, env);
3605 /* We got here through a sigreturn syscall, our path back is via an
3606 rtb insn so setup r14 for that. */
3607 env->regs[14] = env->sregs[SR_PC];
3608
3609 unlock_user_struct(frame, frame_addr, 0);
3610 return env->regs[10];
3611 badframe:
3612 force_sig(TARGET_SIGSEGV);
3613 }
3614
3615 long do_rt_sigreturn(CPUMBState *env)
3616 {
3617 fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n");
3618 return -TARGET_ENOSYS;
3619 }
3620
3621 #elif defined(TARGET_CRIS)
3622
3623 struct target_sigcontext {
3624 struct target_pt_regs regs; /* needs to be first */
3625 uint32_t oldmask;
3626 uint32_t usp; /* usp before stacking this gunk on it */
3627 };
3628
3629 /* Signal frames. */
3630 struct target_signal_frame {
3631 struct target_sigcontext sc;
3632 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3633 uint16_t retcode[4]; /* Trampoline code. */
3634 };
3635
3636 struct rt_signal_frame {
3637 siginfo_t *pinfo;
3638 void *puc;
3639 siginfo_t info;
3640 struct ucontext uc;
3641 uint16_t retcode[4]; /* Trampoline code. */
3642 };
3643
3644 static void setup_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
3645 {
3646 __put_user(env->regs[0], &sc->regs.r0);
3647 __put_user(env->regs[1], &sc->regs.r1);
3648 __put_user(env->regs[2], &sc->regs.r2);
3649 __put_user(env->regs[3], &sc->regs.r3);
3650 __put_user(env->regs[4], &sc->regs.r4);
3651 __put_user(env->regs[5], &sc->regs.r5);
3652 __put_user(env->regs[6], &sc->regs.r6);
3653 __put_user(env->regs[7], &sc->regs.r7);
3654 __put_user(env->regs[8], &sc->regs.r8);
3655 __put_user(env->regs[9], &sc->regs.r9);
3656 __put_user(env->regs[10], &sc->regs.r10);
3657 __put_user(env->regs[11], &sc->regs.r11);
3658 __put_user(env->regs[12], &sc->regs.r12);
3659 __put_user(env->regs[13], &sc->regs.r13);
3660 __put_user(env->regs[14], &sc->usp);
3661 __put_user(env->regs[15], &sc->regs.acr);
3662 __put_user(env->pregs[PR_MOF], &sc->regs.mof);
3663 __put_user(env->pregs[PR_SRP], &sc->regs.srp);
3664 __put_user(env->pc, &sc->regs.erp);
3665 }
3666
3667 static void restore_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
3668 {
3669 __get_user(env->regs[0], &sc->regs.r0);
3670 __get_user(env->regs[1], &sc->regs.r1);
3671 __get_user(env->regs[2], &sc->regs.r2);
3672 __get_user(env->regs[3], &sc->regs.r3);
3673 __get_user(env->regs[4], &sc->regs.r4);
3674 __get_user(env->regs[5], &sc->regs.r5);
3675 __get_user(env->regs[6], &sc->regs.r6);
3676 __get_user(env->regs[7], &sc->regs.r7);
3677 __get_user(env->regs[8], &sc->regs.r8);
3678 __get_user(env->regs[9], &sc->regs.r9);
3679 __get_user(env->regs[10], &sc->regs.r10);
3680 __get_user(env->regs[11], &sc->regs.r11);
3681 __get_user(env->regs[12], &sc->regs.r12);
3682 __get_user(env->regs[13], &sc->regs.r13);
3683 __get_user(env->regs[14], &sc->usp);
3684 __get_user(env->regs[15], &sc->regs.acr);
3685 __get_user(env->pregs[PR_MOF], &sc->regs.mof);
3686 __get_user(env->pregs[PR_SRP], &sc->regs.srp);
3687 __get_user(env->pc, &sc->regs.erp);
3688 }
3689
3690 static abi_ulong get_sigframe(CPUCRISState *env, int framesize)
3691 {
3692 abi_ulong sp;
3693 /* Align the stack downwards to 4. */
3694 sp = (env->regs[R_SP] & ~3);
3695 return sp - framesize;
3696 }
3697
3698 static void setup_frame(int sig, struct target_sigaction *ka,
3699 target_sigset_t *set, CPUCRISState *env)
3700 {
3701 struct target_signal_frame *frame;
3702 abi_ulong frame_addr;
3703 int i;
3704
3705 frame_addr = get_sigframe(env, sizeof *frame);
3706 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3707 goto badframe;
3708
3709 /*
3710 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
3711 * use this trampoline anymore but it sets it up for GDB.
3712 * In QEMU, using the trampoline simplifies things a bit so we use it.
3713 *
3714 * This is movu.w __NR_sigreturn, r9; break 13;
3715 */
3716 __put_user(0x9c5f, frame->retcode+0);
3717 __put_user(TARGET_NR_sigreturn,
3718 frame->retcode + 1);
3719 __put_user(0xe93d, frame->retcode + 2);
3720
3721 /* Save the mask. */
3722 __put_user(set->sig[0], &frame->sc.oldmask);
3723
3724 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3725 __put_user(set->sig[i], &frame->extramask[i - 1]);
3726 }
3727
3728 setup_sigcontext(&frame->sc, env);
3729
3730 /* Move the stack and setup the arguments for the handler. */
3731 env->regs[R_SP] = frame_addr;
3732 env->regs[10] = sig;
3733 env->pc = (unsigned long) ka->_sa_handler;
3734 /* Link SRP so the guest returns through the trampoline. */
3735 env->pregs[PR_SRP] = frame_addr + offsetof(typeof(*frame), retcode);
3736
3737 unlock_user_struct(frame, frame_addr, 1);
3738 return;
3739 badframe:
3740 force_sig(TARGET_SIGSEGV);
3741 }
3742
3743 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3744 target_siginfo_t *info,
3745 target_sigset_t *set, CPUCRISState *env)
3746 {
3747 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
3748 }
3749
3750 long do_sigreturn(CPUCRISState *env)
3751 {
3752 struct target_signal_frame *frame;
3753 abi_ulong frame_addr;
3754 target_sigset_t target_set;
3755 sigset_t set;
3756 int i;
3757
3758 frame_addr = env->regs[R_SP];
3759 /* Make sure the guest isn't playing games. */
3760 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3761 goto badframe;
3762
3763 /* Restore blocked signals */
3764 __get_user(target_set.sig[0], &frame->sc.oldmask);
3765 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3766 __get_user(target_set.sig[i], &frame->extramask[i - 1]);
3767 }
3768 target_to_host_sigset_internal(&set, &target_set);
3769 do_sigprocmask(SIG_SETMASK, &set, NULL);
3770
3771 restore_sigcontext(&frame->sc, env);
3772 unlock_user_struct(frame, frame_addr, 0);
3773 return env->regs[10];
3774 badframe:
3775 force_sig(TARGET_SIGSEGV);
3776 }
3777
3778 long do_rt_sigreturn(CPUCRISState *env)
3779 {
3780 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
3781 return -TARGET_ENOSYS;
3782 }
3783
3784 #elif defined(TARGET_OPENRISC)
3785
3786 struct target_sigcontext {
3787 struct target_pt_regs regs;
3788 abi_ulong oldmask;
3789 abi_ulong usp;
3790 };
3791
3792 struct target_ucontext {
3793 abi_ulong tuc_flags;
3794 abi_ulong tuc_link;
3795 target_stack_t tuc_stack;
3796 struct target_sigcontext tuc_mcontext;
3797 target_sigset_t tuc_sigmask; /* mask last for extensibility */
3798 };
3799
3800 struct target_rt_sigframe {
3801 abi_ulong pinfo;
3802 uint64_t puc;
3803 struct target_siginfo info;
3804 struct target_sigcontext sc;
3805 struct target_ucontext uc;
3806 unsigned char retcode[16]; /* trampoline code */
3807 };
3808
3809 /* This is the asm-generic/ucontext.h version */
3810 #if 0
3811 static int restore_sigcontext(CPUOpenRISCState *regs,
3812 struct target_sigcontext *sc)
3813 {
3814 unsigned int err = 0;
3815 unsigned long old_usp;
3816
3817 /* Alwys make any pending restarted system call return -EINTR */
3818 current_thread_info()->restart_block.fn = do_no_restart_syscall;
3819
3820 /* restore the regs from &sc->regs (same as sc, since regs is first)
3821 * (sc is already checked for VERIFY_READ since the sigframe was
3822 * checked in sys_sigreturn previously)
3823 */
3824
3825 if (copy_from_user(regs, &sc, sizeof(struct target_pt_regs))) {
3826 goto badframe;
3827 }
3828
3829 /* make sure the U-flag is set so user-mode cannot fool us */
3830
3831 regs->sr &= ~SR_SM;
3832
3833 /* restore the old USP as it was before we stacked the sc etc.
3834 * (we cannot just pop the sigcontext since we aligned the sp and
3835 * stuff after pushing it)
3836 */
3837
3838 __get_user(old_usp, &sc->usp);
3839 phx_signal("old_usp 0x%lx", old_usp);
3840
3841 __PHX__ REALLY /* ??? */
3842 wrusp(old_usp);
3843 regs->gpr[1] = old_usp;
3844
3845 /* TODO: the other ports use regs->orig_XX to disable syscall checks
3846 * after this completes, but we don't use that mechanism. maybe we can
3847 * use it now ?
3848 */
3849
3850 return err;
3851
3852 badframe:
3853 return 1;
3854 }
3855 #endif
3856
3857 /* Set up a signal frame. */
3858
3859 static void setup_sigcontext(struct target_sigcontext *sc,
3860 CPUOpenRISCState *regs,
3861 unsigned long mask)
3862 {
3863 unsigned long usp = regs->gpr[1];
3864
3865 /* copy the regs. they are first in sc so we can use sc directly */
3866
3867 /*copy_to_user(&sc, regs, sizeof(struct target_pt_regs));*/
3868
3869 /* Set the frametype to CRIS_FRAME_NORMAL for the execution of
3870 the signal handler. The frametype will be restored to its previous
3871 value in restore_sigcontext. */
3872 /*regs->frametype = CRIS_FRAME_NORMAL;*/
3873
3874 /* then some other stuff */
3875 __put_user(mask, &sc->oldmask);
3876 __put_user(usp, &sc->usp);
3877 }
3878
3879 static inline unsigned long align_sigframe(unsigned long sp)
3880 {
3881 unsigned long i;
3882 i = sp & ~3UL;
3883 return i;
3884 }
3885
3886 static inline abi_ulong get_sigframe(struct target_sigaction *ka,
3887 CPUOpenRISCState *regs,
3888 size_t frame_size)
3889 {
3890 unsigned long sp = regs->gpr[1];
3891 int onsigstack = on_sig_stack(sp);
3892
3893 /* redzone */
3894 /* This is the X/Open sanctioned signal stack switching. */
3895 if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !onsigstack) {
3896 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3897 }
3898
3899 sp = align_sigframe(sp - frame_size);
3900
3901 /*
3902 * If we are on the alternate signal stack and would overflow it, don't.
3903 * Return an always-bogus address instead so we will die with SIGSEGV.
3904 */
3905
3906 if (onsigstack && !likely(on_sig_stack(sp))) {
3907 return -1L;
3908 }
3909
3910 return sp;
3911 }
3912
3913 static void setup_frame(int sig, struct target_sigaction *ka,
3914 target_sigset_t *set, CPUOpenRISCState *env)
3915 {
3916 qemu_log("Not implement.\n");
3917 }
3918
3919 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3920 target_siginfo_t *info,
3921 target_sigset_t *set, CPUOpenRISCState *env)
3922 {
3923 int err = 0;
3924 abi_ulong frame_addr;
3925 unsigned long return_ip;
3926 struct target_rt_sigframe *frame;
3927 abi_ulong info_addr, uc_addr;
3928
3929 frame_addr = get_sigframe(ka, env, sizeof(*frame));
3930 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3931 goto give_sigsegv;
3932 }
3933
3934 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
3935 __put_user(info_addr, &frame->pinfo);
3936 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
3937 __put_user(uc_addr, &frame->puc);
3938
3939 if (ka->sa_flags & SA_SIGINFO) {
3940 copy_siginfo_to_user(&frame->info, info);
3941 }
3942
3943 /*err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));*/
3944 __put_user(0, &frame->uc.tuc_flags);
3945 __put_user(0, &frame->uc.tuc_link);
3946 __put_user(target_sigaltstack_used.ss_sp,
3947 &frame->uc.tuc_stack.ss_sp);
3948 __put_user(sas_ss_flags(env->gpr[1]), &frame->uc.tuc_stack.ss_flags);
3949 __put_user(target_sigaltstack_used.ss_size,
3950 &frame->uc.tuc_stack.ss_size);
3951 setup_sigcontext(&frame->sc, env, set->sig[0]);
3952
3953 /*err |= copy_to_user(frame->uc.tuc_sigmask, set, sizeof(*set));*/
3954
3955 /* trampoline - the desired return ip is the retcode itself */
3956 return_ip = (unsigned long)&frame->retcode;
3957 /* This is l.ori r11,r0,__NR_sigreturn, l.sys 1 */
3958 __put_user(0xa960, (short *)(frame->retcode + 0));
3959 __put_user(TARGET_NR_rt_sigreturn, (short *)(frame->retcode + 2));
3960 __put_user(0x20000001, (unsigned long *)(frame->retcode + 4));
3961 __put_user(0x15000000, (unsigned long *)(frame->retcode + 8));
3962
3963 if (err) {
3964 goto give_sigsegv;
3965 }
3966
3967 /* TODO what is the current->exec_domain stuff and invmap ? */
3968
3969 /* Set up registers for signal handler */
3970 env->pc = (unsigned long)ka->_sa_handler; /* what we enter NOW */
3971 env->gpr[9] = (unsigned long)return_ip; /* what we enter LATER */
3972 env->gpr[3] = (unsigned long)sig; /* arg 1: signo */
3973 env->gpr[4] = (unsigned long)&frame->info; /* arg 2: (siginfo_t*) */
3974 env->gpr[5] = (unsigned long)&frame->uc; /* arg 3: ucontext */
3975
3976 /* actually move the usp to reflect the stacked frame */
3977 env->gpr[1] = (unsigned long)frame;
3978
3979 return;
3980
3981 give_sigsegv:
3982 unlock_user_struct(frame, frame_addr, 1);
3983 if (sig == TARGET_SIGSEGV) {
3984 ka->_sa_handler = TARGET_SIG_DFL;
3985 }
3986 force_sig(TARGET_SIGSEGV);
3987 }
3988
3989 long do_sigreturn(CPUOpenRISCState *env)
3990 {
3991
3992 qemu_log("do_sigreturn: not implemented\n");
3993 return -TARGET_ENOSYS;
3994 }
3995
3996 long do_rt_sigreturn(CPUOpenRISCState *env)
3997 {
3998 qemu_log("do_rt_sigreturn: not implemented\n");
3999 return -TARGET_ENOSYS;
4000 }
4001 /* TARGET_OPENRISC */
4002
4003 #elif defined(TARGET_S390X)
4004
4005 #define __NUM_GPRS 16
4006 #define __NUM_FPRS 16
4007 #define __NUM_ACRS 16
4008
4009 #define S390_SYSCALL_SIZE 2
4010 #define __SIGNAL_FRAMESIZE 160 /* FIXME: 31-bit mode -> 96 */
4011
4012 #define _SIGCONTEXT_NSIG 64
4013 #define _SIGCONTEXT_NSIG_BPW 64 /* FIXME: 31-bit mode -> 32 */
4014 #define _SIGCONTEXT_NSIG_WORDS (_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW)
4015 #define _SIGMASK_COPY_SIZE (sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS)
4016 #define PSW_ADDR_AMODE 0x0000000000000000UL /* 0x80000000UL for 31-bit */
4017 #define S390_SYSCALL_OPCODE ((uint16_t)0x0a00)
4018
4019 typedef struct {
4020 target_psw_t psw;
4021 target_ulong gprs[__NUM_GPRS];
4022 unsigned int acrs[__NUM_ACRS];
4023 } target_s390_regs_common;
4024
4025 typedef struct {
4026 unsigned int fpc;
4027 double fprs[__NUM_FPRS];
4028 } target_s390_fp_regs;
4029
4030 typedef struct {
4031 target_s390_regs_common regs;
4032 target_s390_fp_regs fpregs;
4033 } target_sigregs;
4034
4035 struct target_sigcontext {
4036 target_ulong oldmask[_SIGCONTEXT_NSIG_WORDS];
4037 target_sigregs *sregs;
4038 };
4039
4040 typedef struct {
4041 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
4042 struct target_sigcontext sc;
4043 target_sigregs sregs;
4044 int signo;
4045 uint8_t retcode[S390_SYSCALL_SIZE];
4046 } sigframe;
4047
4048 struct target_ucontext {
4049 target_ulong tuc_flags;
4050 struct target_ucontext *tuc_link;
4051 target_stack_t tuc_stack;
4052 target_sigregs tuc_mcontext;
4053 target_sigset_t tuc_sigmask; /* mask last for extensibility */
4054 };
4055
4056 typedef struct {
4057 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
4058 uint8_t retcode[S390_SYSCALL_SIZE];
4059 struct target_siginfo info;
4060 struct target_ucontext uc;
4061 } rt_sigframe;
4062
4063 static inline abi_ulong
4064 get_sigframe(struct target_sigaction *ka, CPUS390XState *env, size_t frame_size)
4065 {
4066 abi_ulong sp;
4067
4068 /* Default to using normal stack */
4069 sp = env->regs[15];
4070
4071 /* This is the X/Open sanctioned signal stack switching. */
4072 if (ka->sa_flags & TARGET_SA_ONSTACK) {
4073 if (!sas_ss_flags(sp)) {
4074 sp = target_sigaltstack_used.ss_sp +
4075 target_sigaltstack_used.ss_size;
4076 }
4077 }
4078
4079 /* This is the legacy signal stack switching. */
4080 else if (/* FIXME !user_mode(regs) */ 0 &&
4081 !(ka->sa_flags & TARGET_SA_RESTORER) &&
4082 ka->sa_restorer) {
4083 sp = (abi_ulong) ka->sa_restorer;
4084 }
4085
4086 return (sp - frame_size) & -8ul;
4087 }
4088
4089 static void save_sigregs(CPUS390XState *env, target_sigregs *sregs)
4090 {
4091 int i;
4092 //save_access_regs(current->thread.acrs); FIXME
4093
4094 /* Copy a 'clean' PSW mask to the user to avoid leaking
4095 information about whether PER is currently on. */
4096 __put_user(env->psw.mask, &sregs->regs.psw.mask);
4097 __put_user(env->psw.addr, &sregs->regs.psw.addr);
4098 for (i = 0; i < 16; i++) {
4099 __put_user(env->regs[i], &sregs->regs.gprs[i]);
4100 }
4101 for (i = 0; i < 16; i++) {
4102 __put_user(env->aregs[i], &sregs->regs.acrs[i]);
4103 }
4104 /*
4105 * We have to store the fp registers to current->thread.fp_regs
4106 * to merge them with the emulated registers.
4107 */
4108 //save_fp_regs(&current->thread.fp_regs); FIXME
4109 for (i = 0; i < 16; i++) {
4110 __put_user(env->fregs[i].ll, &sregs->fpregs.fprs[i]);
4111 }
4112 }
4113
4114 static void setup_frame(int sig, struct target_sigaction *ka,
4115 target_sigset_t *set, CPUS390XState *env)
4116 {
4117 sigframe *frame;
4118 abi_ulong frame_addr;
4119
4120 frame_addr = get_sigframe(ka, env, sizeof(*frame));
4121 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
4122 (unsigned long long)frame_addr);
4123 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
4124 goto give_sigsegv;
4125 }
4126
4127 qemu_log("%s: 1\n", __FUNCTION__);
4128 __put_user(set->sig[0], &frame->sc.oldmask[0]);
4129
4130 save_sigregs(env, &frame->sregs);
4131
4132 __put_user((abi_ulong)(unsigned long)&frame->sregs,
4133 (abi_ulong *)&frame->sc.sregs);
4134
4135 /* Set up to return from userspace. If provided, use a stub
4136 already in userspace. */
4137 if (ka->sa_flags & TARGET_SA_RESTORER) {
4138 env->regs[14] = (unsigned long)
4139 ka->sa_restorer | PSW_ADDR_AMODE;
4140 } else {
4141 env->regs[14] = (unsigned long)
4142 frame->retcode | PSW_ADDR_AMODE;
4143 __put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn,
4144 (uint16_t *)(frame->retcode));
4145 }
4146
4147 /* Set up backchain. */
4148 __put_user(env->regs[15], (abi_ulong *) frame);
4149
4150 /* Set up registers for signal handler */
4151 env->regs[15] = frame_addr;
4152 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
4153
4154 env->regs[2] = sig; //map_signal(sig);
4155 env->regs[3] = frame_addr += offsetof(typeof(*frame), sc);
4156
4157 /* We forgot to include these in the sigcontext.
4158 To avoid breaking binary compatibility, they are passed as args. */
4159 env->regs[4] = 0; // FIXME: no clue... current->thread.trap_no;
4160 env->regs[5] = 0; // FIXME: no clue... current->thread.prot_addr;
4161
4162 /* Place signal number on stack to allow backtrace from handler. */
4163 __put_user(env->regs[2], (int *) &frame->signo);
4164 unlock_user_struct(frame, frame_addr, 1);
4165 return;
4166
4167 give_sigsegv:
4168 qemu_log("%s: give_sigsegv\n", __FUNCTION__);
4169 force_sig(TARGET_SIGSEGV);
4170 }
4171
4172 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4173 target_siginfo_t *info,
4174 target_sigset_t *set, CPUS390XState *env)
4175 {
4176 int i;
4177 rt_sigframe *frame;
4178 abi_ulong frame_addr;
4179
4180 frame_addr = get_sigframe(ka, env, sizeof *frame);
4181 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
4182 (unsigned long long)frame_addr);
4183 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
4184 goto give_sigsegv;
4185 }
4186
4187 qemu_log("%s: 1\n", __FUNCTION__);
4188 copy_siginfo_to_user(&frame->info, info);
4189
4190 /* Create the ucontext. */
4191 __put_user(0, &frame->uc.tuc_flags);
4192 __put_user((abi_ulong)0, (abi_ulong *)&frame->uc.tuc_link);
4193 __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
4194 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
4195 &frame->uc.tuc_stack.ss_flags);
4196 __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size);
4197 save_sigregs(env, &frame->uc.tuc_mcontext);
4198 for (i = 0; i < TARGET_NSIG_WORDS; i++) {
4199 __put_user((abi_ulong)set->sig[i],
4200 (abi_ulong *)&frame->uc.tuc_sigmask.sig[i]);
4201 }
4202
4203 /* Set up to return from userspace. If provided, use a stub
4204 already in userspace. */
4205 if (ka->sa_flags & TARGET_SA_RESTORER) {
4206 env->regs[14] = (unsigned long) ka->sa_restorer | PSW_ADDR_AMODE;
4207 } else {
4208 env->regs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE;
4209 __put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn,
4210 (uint16_t *)(frame->retcode));
4211 }
4212
4213 /* Set up backchain. */
4214 __put_user(env->regs[15], (abi_ulong *) frame);
4215
4216 /* Set up registers for signal handler */
4217 env->regs[15] = frame_addr;
4218 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
4219
4220 env->regs[2] = sig; //map_signal(sig);
4221 env->regs[3] = frame_addr + offsetof(typeof(*frame), info);
4222 env->regs[4] = frame_addr + offsetof(typeof(*frame), uc);
4223 return;
4224
4225 give_sigsegv:
4226 qemu_log("%s: give_sigsegv\n", __FUNCTION__);
4227 force_sig(TARGET_SIGSEGV);
4228 }
4229
4230 static int
4231 restore_sigregs(CPUS390XState *env, target_sigregs *sc)
4232 {
4233 int err = 0;
4234 int i;
4235
4236 for (i = 0; i < 16; i++) {
4237 __get_user(env->regs[i], &sc->regs.gprs[i]);
4238 }
4239
4240 __get_user(env->psw.mask, &sc->regs.psw.mask);
4241 qemu_log("%s: sc->regs.psw.addr 0x%llx env->psw.addr 0x%llx\n",
4242 __FUNCTION__, (unsigned long long)sc->regs.psw.addr,
4243 (unsigned long long)env->psw.addr);
4244 __get_user(env->psw.addr, &sc->regs.psw.addr);
4245 /* FIXME: 31-bit -> | PSW_ADDR_AMODE */
4246
4247 for (i = 0; i < 16; i++) {
4248 __get_user(env->aregs[i], &sc->regs.acrs[i]);
4249 }
4250 for (i = 0; i < 16; i++) {
4251 __get_user(env->fregs[i].ll, &sc->fpregs.fprs[i]);
4252 }
4253
4254 return err;
4255 }
4256
4257 long do_sigreturn(CPUS390XState *env)
4258 {
4259 sigframe *frame;
4260 abi_ulong frame_addr = env->regs[15];
4261 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
4262 (unsigned long long)frame_addr);
4263 target_sigset_t target_set;
4264 sigset_t set;
4265
4266 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
4267 goto badframe;
4268 }
4269 __get_user(target_set.sig[0], &frame->sc.oldmask[0]);
4270
4271 target_to_host_sigset_internal(&set, &target_set);
4272 do_sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */
4273
4274 if (restore_sigregs(env, &frame->sregs)) {
4275 goto badframe;
4276 }
4277
4278 unlock_user_struct(frame, frame_addr, 0);
4279 return env->regs[2];
4280
4281 badframe:
4282 force_sig(TARGET_SIGSEGV);
4283 return 0;
4284 }
4285
4286 long do_rt_sigreturn(CPUS390XState *env)
4287 {
4288 rt_sigframe *frame;
4289 abi_ulong frame_addr = env->regs[15];
4290 qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__,
4291 (unsigned long long)frame_addr);
4292 sigset_t set;
4293
4294 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
4295 goto badframe;
4296 }
4297 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
4298
4299 do_sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */
4300
4301 if (restore_sigregs(env, &frame->uc.tuc_mcontext)) {
4302 goto badframe;
4303 }
4304
4305 if (do_sigaltstack(frame_addr + offsetof(rt_sigframe, uc.tuc_stack), 0,
4306 get_sp_from_cpustate(env)) == -EFAULT) {
4307 goto badframe;
4308 }
4309 unlock_user_struct(frame, frame_addr, 0);
4310 return env->regs[2];
4311
4312 badframe:
4313 unlock_user_struct(frame, frame_addr, 0);
4314 force_sig(TARGET_SIGSEGV);
4315 return 0;
4316 }
4317
4318 #elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
4319
4320 /* FIXME: Many of the structures are defined for both PPC and PPC64, but
4321 the signal handling is different enough that we haven't implemented
4322 support for PPC64 yet. Hence the restriction above.
4323
4324 There are various #if'd blocks for code for TARGET_PPC64. These
4325 blocks should go away so that we can successfully run 32-bit and
4326 64-bit binaries on a QEMU configured for PPC64. */
4327
4328 /* Size of dummy stack frame allocated when calling signal handler.
4329 See arch/powerpc/include/asm/ptrace.h. */
4330 #if defined(TARGET_PPC64)
4331 #define SIGNAL_FRAMESIZE 128
4332 #else
4333 #define SIGNAL_FRAMESIZE 64
4334 #endif
4335
4336 /* See arch/powerpc/include/asm/sigcontext.h. */
4337 struct target_sigcontext {
4338 target_ulong _unused[4];
4339 int32_t signal;
4340 #if defined(TARGET_PPC64)
4341 int32_t pad0;
4342 #endif
4343 target_ulong handler;
4344 target_ulong oldmask;
4345 target_ulong regs; /* struct pt_regs __user * */
4346 /* TODO: PPC64 includes extra bits here. */
4347 };
4348
4349 /* Indices for target_mcontext.mc_gregs, below.
4350 See arch/powerpc/include/asm/ptrace.h for details. */
4351 enum {
4352 TARGET_PT_R0 = 0,
4353 TARGET_PT_R1 = 1,
4354 TARGET_PT_R2 = 2,
4355 TARGET_PT_R3 = 3,
4356 TARGET_PT_R4 = 4,
4357 TARGET_PT_R5 = 5,
4358 TARGET_PT_R6 = 6,
4359 TARGET_PT_R7 = 7,
4360 TARGET_PT_R8 = 8,
4361 TARGET_PT_R9 = 9,
4362 TARGET_PT_R10 = 10,
4363 TARGET_PT_R11 = 11,
4364 TARGET_PT_R12 = 12,
4365 TARGET_PT_R13 = 13,
4366 TARGET_PT_R14 = 14,
4367 TARGET_PT_R15 = 15,
4368 TARGET_PT_R16 = 16,
4369 TARGET_PT_R17 = 17,
4370 TARGET_PT_R18 = 18,
4371 TARGET_PT_R19 = 19,
4372 TARGET_PT_R20 = 20,
4373 TARGET_PT_R21 = 21,
4374 TARGET_PT_R22 = 22,
4375 TARGET_PT_R23 = 23,
4376 TARGET_PT_R24 = 24,
4377 TARGET_PT_R25 = 25,
4378 TARGET_PT_R26 = 26,
4379 TARGET_PT_R27 = 27,
4380 TARGET_PT_R28 = 28,
4381 TARGET_PT_R29 = 29,
4382 TARGET_PT_R30 = 30,
4383 TARGET_PT_R31 = 31,
4384 TARGET_PT_NIP = 32,
4385 TARGET_PT_MSR = 33,
4386 TARGET_PT_ORIG_R3 = 34,
4387 TARGET_PT_CTR = 35,
4388 TARGET_PT_LNK = 36,
4389 TARGET_PT_XER = 37,
4390 TARGET_PT_CCR = 38,
4391 /* Yes, there are two registers with #39. One is 64-bit only. */
4392 TARGET_PT_MQ = 39,
4393 TARGET_PT_SOFTE = 39,
4394 TARGET_PT_TRAP = 40,
4395 TARGET_PT_DAR = 41,
4396 TARGET_PT_DSISR = 42,
4397 TARGET_PT_RESULT = 43,
4398 TARGET_PT_REGS_COUNT = 44
4399 };
4400
4401 /* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC;
4402 on 64-bit PPC, sigcontext and mcontext are one and the same. */
4403 struct target_mcontext {
4404 target_ulong mc_gregs[48];
4405 /* Includes fpscr. */
4406 uint64_t mc_fregs[33];
4407 target_ulong mc_pad[2];
4408 /* We need to handle Altivec and SPE at the same time, which no
4409 kernel needs to do. Fortunately, the kernel defines this bit to
4410 be Altivec-register-large all the time, rather than trying to
4411 twiddle it based on the specific platform. */
4412 union {
4413 /* SPE vector registers. One extra for SPEFSCR. */
4414 uint32_t spe[33];
4415 /* Altivec vector registers. The packing of VSCR and VRSAVE
4416 varies depending on whether we're PPC64 or not: PPC64 splits
4417 them apart; PPC32 stuffs them together. */
4418 #if defined(TARGET_PPC64)
4419 #define QEMU_NVRREG 34
4420 #else
4421 #define QEMU_NVRREG 33
4422 #endif
4423 ppc_avr_t altivec[QEMU_NVRREG];
4424 #undef QEMU_NVRREG
4425 } mc_vregs __attribute__((__aligned__(16)));
4426 };
4427
4428 struct target_ucontext {
4429 target_ulong tuc_flags;
4430 target_ulong tuc_link; /* struct ucontext __user * */
4431 struct target_sigaltstack tuc_stack;
4432 #if !defined(TARGET_PPC64)
4433 int32_t tuc_pad[7];
4434 target_ulong tuc_regs; /* struct mcontext __user *
4435 points to uc_mcontext field */
4436 #endif
4437 target_sigset_t tuc_sigmask;
4438 #if defined(TARGET_PPC64)
4439 target_sigset_t unused[15]; /* Allow for uc_sigmask growth */
4440 struct target_sigcontext tuc_mcontext;
4441 #else
4442 int32_t tuc_maskext[30];
4443 int32_t tuc_pad2[3];
4444 struct target_mcontext tuc_mcontext;
4445 #endif
4446 };
4447
4448 /* See arch/powerpc/kernel/signal_32.c. */
4449 struct target_sigframe {
4450 struct target_sigcontext sctx;
4451 struct target_mcontext mctx;
4452 int32_t abigap[56];
4453 };
4454
4455 struct target_rt_sigframe {
4456 struct target_siginfo info;
4457 struct target_ucontext uc;
4458 int32_t abigap[56];
4459 };
4460
4461 /* We use the mc_pad field for the signal return trampoline. */
4462 #define tramp mc_pad
4463
4464 /* See arch/powerpc/kernel/signal.c. */
4465 static target_ulong get_sigframe(struct target_sigaction *ka,
4466 CPUPPCState *env,
4467 int frame_size)
4468 {
4469 target_ulong oldsp, newsp;
4470
4471 oldsp = env->gpr[1];
4472
4473 if ((ka->sa_flags & TARGET_SA_ONSTACK) &&
4474 (sas_ss_flags(oldsp) == 0)) {
4475 oldsp = (target_sigaltstack_used.ss_sp
4476 + target_sigaltstack_used.ss_size);
4477 }
4478
4479 newsp = (oldsp - frame_size) & ~0xFUL;
4480
4481 return newsp;
4482 }
4483
4484 static void save_user_regs(CPUPPCState *env, struct target_mcontext *frame,
4485 int sigret)
4486 {
4487 target_ulong msr = env->msr;
4488 int i;
4489 target_ulong ccr = 0;
4490
4491 /* In general, the kernel attempts to be intelligent about what it
4492 needs to save for Altivec/FP/SPE registers. We don't care that
4493 much, so we just go ahead and save everything. */
4494
4495 /* Save general registers. */
4496 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4497 __put_user(env->gpr[i], &frame->mc_gregs[i]);
4498 }
4499 __put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]);
4500 __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]);
4501 __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]);
4502 __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]);
4503
4504 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
4505 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
4506 }
4507 __put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]);
4508
4509 /* Save Altivec registers if necessary. */
4510 if (env->insns_flags & PPC_ALTIVEC) {
4511 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
4512 ppc_avr_t *avr = &env->avr[i];
4513 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
4514
4515 __put_user(avr->u64[0], &vreg->u64[0]);
4516 __put_user(avr->u64[1], &vreg->u64[1]);
4517 }
4518 /* Set MSR_VR in the saved MSR value to indicate that
4519 frame->mc_vregs contains valid data. */
4520 msr |= MSR_VR;
4521 __put_user((uint32_t)env->spr[SPR_VRSAVE],
4522 &frame->mc_vregs.altivec[32].u32[3]);
4523 }
4524
4525 /* Save floating point registers. */
4526 if (env->insns_flags & PPC_FLOAT) {
4527 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
4528 __put_user(env->fpr[i], &frame->mc_fregs[i]);
4529 }
4530 __put_user((uint64_t) env->fpscr, &frame->mc_fregs[32]);
4531 }
4532
4533 /* Save SPE registers. The kernel only saves the high half. */
4534 if (env->insns_flags & PPC_SPE) {
4535 #if defined(TARGET_PPC64)
4536 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4537 __put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i]);
4538 }
4539 #else
4540 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
4541 __put_user(env->gprh[i], &frame->mc_vregs.spe[i]);
4542 }
4543 #endif
4544 /* Set MSR_SPE in the saved MSR value to indicate that
4545 frame->mc_vregs contains valid data. */
4546 msr |= MSR_SPE;
4547 __put_user(env->spe_fscr, &frame->mc_vregs.spe[32]);
4548 }
4549
4550 /* Store MSR. */
4551 __put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]);
4552
4553 /* Set up the sigreturn trampoline: li r0,sigret; sc. */
4554 if (sigret) {
4555 __put_user(0x38000000UL | sigret, &frame->tramp[0]);
4556 __put_user(0x44000002UL, &frame->tramp[1]);
4557 }
4558 }
4559
4560 static void restore_user_regs(CPUPPCState *env,
4561 struct target_mcontext *frame, int sig)
4562 {
4563 target_ulong save_r2 = 0;
4564 target_ulong msr;
4565 target_ulong ccr;
4566
4567 int i;
4568
4569 if (!sig) {
4570 save_r2 = env->gpr[2];
4571 }
4572
4573 /* Restore general registers. */
4574 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4575 __get_user(env->gpr[i], &frame->mc_gregs[i]);
4576 }
4577 __get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]);
4578 __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]);
4579 __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]);
4580 __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]);
4581 __get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]);
4582
4583 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
4584 env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf;
4585 }
4586
4587 if (!sig) {
4588 env->gpr[2] = save_r2;
4589 }
4590 /* Restore MSR. */
4591 __get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]);
4592
4593 /* If doing signal return, restore the previous little-endian mode. */
4594 if (sig)
4595 env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE);
4596
4597 /* Restore Altivec registers if necessary. */
4598 if (env->insns_flags & PPC_ALTIVEC) {
4599 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
4600 ppc_avr_t *avr = &env->avr[i];
4601 ppc_avr_t *vreg = &frame->mc_vregs.altivec[i];
4602
4603 __get_user(avr->u64[0], &vreg->u64[0]);
4604 __get_user(avr->u64[1], &vreg->u64[1]);
4605 }
4606 /* Set MSR_VEC in the saved MSR value to indicate that
4607 frame->mc_vregs contains valid data. */
4608 __get_user(env->spr[SPR_VRSAVE],
4609 (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3]));
4610 }
4611
4612 /* Restore floating point registers. */
4613 if (env->insns_flags & PPC_FLOAT) {
4614 uint64_t fpscr;
4615 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
4616 __get_user(env->fpr[i], &frame->mc_fregs[i]);
4617 }
4618 __get_user(fpscr, &frame->mc_fregs[32]);
4619 env->fpscr = (uint32_t) fpscr;
4620 }
4621
4622 /* Save SPE registers. The kernel only saves the high half. */
4623 if (env->insns_flags & PPC_SPE) {
4624 #if defined(TARGET_PPC64)
4625 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4626 uint32_t hi;
4627
4628 __get_user(hi, &frame->mc_vregs.spe[i]);
4629 env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
4630 }
4631 #else
4632 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
4633 __get_user(env->gprh[i], &frame->mc_vregs.spe[i]);
4634 }
4635 #endif
4636 __get_user(env->spe_fscr, &frame->mc_vregs.spe[32]);
4637 }
4638 }
4639
4640 static void setup_frame(int sig, struct target_sigaction *ka,
4641 target_sigset_t *set, CPUPPCState *env)
4642 {
4643 struct target_sigframe *frame;
4644 struct target_sigcontext *sc;
4645 target_ulong frame_addr, newsp;
4646 int err = 0;
4647 int signal;
4648
4649 frame_addr = get_sigframe(ka, env, sizeof(*frame));
4650 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
4651 goto sigsegv;
4652 sc = &frame->sctx;
4653
4654 signal = current_exec_domain_sig(sig);
4655
4656 __put_user(ka->_sa_handler, &sc->handler);
4657 __put_user(set->sig[0], &sc->oldmask);
4658 #if defined(TARGET_PPC64)
4659 __put_user(set->sig[0] >> 32, &sc->_unused[3]);
4660 #else
4661 __put_user(set->sig[1], &sc->_unused[3]);
4662 #endif
4663 __put_user(h2g(&frame->mctx), &sc->regs);
4664 __put_user(sig, &sc->signal);
4665
4666 /* Save user regs. */
4667 save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn);
4668
4669 /* The kernel checks for the presence of a VDSO here. We don't
4670 emulate a vdso, so use a sigreturn system call. */
4671 env->lr = (target_ulong) h2g(frame->mctx.tramp);
4672
4673 /* Turn off all fp exceptions. */
4674 env->fpscr = 0;
4675
4676 /* Create a stack frame for the caller of the handler. */
4677 newsp = frame_addr - SIGNAL_FRAMESIZE;
4678 err |= put_user(env->gpr[1], newsp, target_ulong);
4679
4680 if (err)
4681 goto sigsegv;
4682
4683 /* Set up registers for signal handler. */
4684 env->gpr[1] = newsp;
4685 env->gpr[3] = signal;
4686 env->gpr[4] = frame_addr + offsetof(struct target_sigframe, sctx);
4687 env->nip = (target_ulong) ka->_sa_handler;
4688 /* Signal handlers are entered in big-endian mode. */
4689 env->msr &= ~MSR_LE;
4690
4691 unlock_user_struct(frame, frame_addr, 1);
4692 return;
4693
4694 sigsegv:
4695 unlock_user_struct(frame, frame_addr, 1);
4696 qemu_log("segfaulting from setup_frame\n");
4697 force_sig(TARGET_SIGSEGV);
4698 }
4699
4700 static void setup_rt_frame(int sig, struct target_sigaction *ka,
4701 target_siginfo_t *info,
4702 target_sigset_t *set, CPUPPCState *env)
4703 {
4704 struct target_rt_sigframe *rt_sf;
4705 struct target_mcontext *frame;
4706 target_ulong rt_sf_addr, newsp = 0;
4707 int i, err = 0;
4708 int signal;
4709
4710 rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
4711 if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1))
4712 goto sigsegv;
4713
4714 signal = current_exec_domain_sig(sig);
4715
4716 copy_siginfo_to_user(&rt_sf->info, info);
4717
4718 __put_user(0, &rt_sf->uc.tuc_flags);
4719 __put_user(0, &rt_sf->uc.tuc_link);
4720 __put_user((target_ulong)target_sigaltstack_used.ss_sp,
4721 &rt_sf->uc.tuc_stack.ss_sp);
4722 __put_user(sas_ss_flags(env->gpr[1]),
4723 &rt_sf->uc.tuc_stack.ss_flags);
4724 __put_user(target_sigaltstack_used.ss_size,
4725 &rt_sf->uc.tuc_stack.ss_size);
4726 __put_user(h2g (&rt_sf->uc.tuc_mcontext),
4727 &rt_sf->uc.tuc_regs);
4728 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
4729 __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]);
4730 }
4731
4732 frame = &rt_sf->uc.tuc_mcontext;
4733 save_user_regs(env, frame, TARGET_NR_rt_sigreturn);
4734
4735 /* The kernel checks for the presence of a VDSO here. We don't
4736 emulate a vdso, so use a sigreturn system call. */
4737 env->lr = (target_ulong) h2g(frame->tramp);
4738
4739 /* Turn off all fp exceptions. */
4740 env->fpscr = 0;
4741
4742 /* Create a stack frame for the caller of the handler. */
4743 newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
4744 __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
4745
4746 if (err)
4747 goto sigsegv;
4748
4749 /* Set up registers for signal handler. */
4750 env->gpr[1] = newsp;
4751 env->gpr[3] = (target_ulong) signal;
4752 env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
4753 env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
4754 env->gpr[6] = (target_ulong) h2g(rt_sf);
4755 env->nip = (target_ulong) ka->_sa_handler;
4756 /* Signal handlers are entered in big-endian mode. */
4757 env->msr &= ~MSR_LE;
4758
4759 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4760 return;
4761
4762 sigsegv:
4763 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4764 qemu_log("segfaulting from setup_rt_frame\n");
4765 force_sig(TARGET_SIGSEGV);
4766
4767 }
4768
4769 long do_sigreturn(CPUPPCState *env)
4770 {
4771 struct target_sigcontext *sc = NULL;
4772 struct target_mcontext *sr = NULL;
4773 target_ulong sr_addr = 0, sc_addr;
4774 sigset_t blocked;
4775 target_sigset_t set;
4776
4777 sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
4778 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1))
4779 goto sigsegv;
4780
4781 #if defined(TARGET_PPC64)
4782 set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32);
4783 #else
4784 __get_user(set.sig[0], &sc->oldmask);
4785 __get_user(set.sig[1], &sc->_unused[3]);
4786 #endif
4787 target_to_host_sigset_internal(&blocked, &set);
4788 do_sigprocmask(SIG_SETMASK, &blocked, NULL);
4789
4790 __get_user(sr_addr, &sc->regs);
4791 if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1))
4792 goto sigsegv;
4793 restore_user_regs(env, sr, 1);
4794
4795 unlock_user_struct(sr, sr_addr, 1);
4796 unlock_user_struct(sc, sc_addr, 1);
4797 return -TARGET_QEMU_ESIGRETURN;
4798
4799 sigsegv:
4800 unlock_user_struct(sr, sr_addr, 1);
4801 unlock_user_struct(sc, sc_addr, 1);
4802 qemu_log("segfaulting from do_sigreturn\n");
4803 force_sig(TARGET_SIGSEGV);
4804 return 0;
4805 }
4806
4807 /* See arch/powerpc/kernel/signal_32.c. */
4808 static int do_setcontext(struct target_ucontext *ucp, CPUPPCState *env, int sig)
4809 {
4810 struct target_mcontext *mcp;
4811 target_ulong mcp_addr;
4812 sigset_t blocked;
4813 target_sigset_t set;
4814
4815 if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask),
4816 sizeof (set)))
4817 return 1;
4818
4819 #if defined(TARGET_PPC64)
4820 fprintf (stderr, "do_setcontext: not implemented\n");
4821 return 0;
4822 #else
4823 __get_user(mcp_addr, &ucp->tuc_regs);
4824
4825 if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1))
4826 return 1;
4827
4828 target_to_host_sigset_internal(&blocked, &set);
4829 do_sigprocmask(SIG_SETMASK, &blocked, NULL);
4830 restore_user_regs(env, mcp, sig);
4831
4832 unlock_user_struct(mcp, mcp_addr, 1);
4833 return 0;
4834 #endif
4835 }
4836
4837 long do_rt_sigreturn(CPUPPCState *env)
4838 {
4839 struct target_rt_sigframe *rt_sf = NULL;
4840 target_ulong rt_sf_addr;
4841
4842 rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16;
4843 if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1))
4844 goto sigsegv;
4845
4846 if (do_setcontext(&rt_sf->uc, env, 1))
4847 goto sigsegv;
4848
4849 do_sigaltstack(rt_sf_addr
4850 + offsetof(struct target_rt_sigframe, uc.tuc_stack),
4851 0, env->gpr[1]);
4852
4853 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4854 return -TARGET_QEMU_ESIGRETURN;
4855
4856 sigsegv:
4857 unlock_user_struct(rt_sf, rt_sf_addr, 1);
4858 qemu_log("segfaulting from do_rt_sigreturn\n");
4859 force_sig(TARGET_SIGSEGV);
4860 return 0;
4861 }
4862
4863 #elif defined(TARGET_M68K)
4864
4865 struct target_sigcontext {
4866 abi_ulong sc_mask;
4867 abi_ulong sc_usp;
4868 abi_ulong sc_d0;
4869 abi_ulong sc_d1;
4870 abi_ulong sc_a0;
4871 abi_ulong sc_a1;
4872 unsigned short sc_sr;
4873 abi_ulong sc_pc;
4874 };
4875
4876 struct target_sigframe
4877 {
4878 abi_ulong pretcode;
4879 int sig;
4880 int code;
4881 abi_ulong psc;
4882 char retcode[8];
4883 abi_ulong extramask[TARGET_NSIG_WORDS-1];
4884 struct target_sigcontext sc;
4885 };
4886
4887 typedef int target_greg_t;
4888 #define TARGET_NGREG 18
4889 typedef target_greg_t target_gregset_t[TARGET_NGREG];
4890
4891 typedef struct target_fpregset {
4892 int f_fpcntl[3];
4893 int f_fpregs[8*3];
4894 } target_fpregset_t;
4895
4896 struct target_mcontext {
4897 int version;
4898 target_gregset_t gregs;
4899 target_fpregset_t fpregs;
4900 };
4901
4902 #define TARGET_MCONTEXT_VERSION 2
4903
4904 struct target_ucontext {
4905 abi_ulong tuc_flags;
4906 abi_ulong tuc_link;
4907 target_stack_t tuc_stack;
4908 struct target_mcontext tuc_mcontext;
4909 abi_long tuc_filler[80];
4910 target_sigset_t tuc_sigmask;
4911 };
4912
4913 struct target_rt_sigframe
4914 {
4915 abi_ulong pretcode;
4916 int sig;
4917 abi_ulong pinfo;
4918 abi_ulong puc;
4919 char retcode[8];
4920 struct target_siginfo info;
4921 struct target_ucontext uc;
4922 };
4923
4924 static void setup_sigcontext(struct target_sigcontext *sc, CPUM68KState *env,
4925 abi_ulong mask)
4926 {
4927 __put_user(mask, &sc->sc_mask);
4928 __put_user(env->aregs[7], &sc->sc_usp);
4929 __put_user(env->dregs[0], &sc->sc_d0);
4930 __put_user(env->dregs[1], &sc->sc_d1);
4931 __put_user(env->aregs[0], &sc->sc_a0);
4932 __put_user(env->aregs[1], &sc->sc_a1);
4933 __put_user(env->sr, &sc->sc_sr);
4934 __put_user(env->pc, &sc->sc_pc);
4935 }
4936
4937 static void
4938 restore_sigcontext(CPUM68KState *env, struct target_sigcontext *sc, int *pd0)
4939 {
4940 int temp;
4941
4942 __get_user(env->aregs[7], &sc->sc_usp);
4943 __get_user(env->dregs[1], &sc->sc_d1);
4944 __get_user(env->aregs[0], &sc->sc_a0);
4945 __get_user(env->aregs[1], &sc->sc_a1);
4946 __get_user(env->pc, &sc->sc_pc);
4947 __get_user(temp, &sc->sc_sr);
4948 env->sr = (env->sr & 0xff00) | (temp & 0xff);
4949
4950 *pd0 = tswapl(sc->sc_d0);
4951 }
4952
4953 /*
4954 * Determine which stack to use..
4955 */
4956 static inline abi_ulong
4957 get_sigframe(struct target_sigaction *ka, CPUM68KState *regs,
4958 size_t frame_size)
4959 {
4960 unsigned long sp;
4961
4962 sp = regs->aregs[7];
4963
4964 /* This is the X/Open sanctioned signal stack switching. */
4965 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
4966 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
4967 }
4968
4969 return ((sp - frame_size) & -8UL);
4970 }
4971
4972 static void setup_frame(int sig, struct target_sigaction *ka,
4973 target_sigset_t *set, CPUM68KState *env)
4974 {
4975 struct target_sigframe *frame;
4976 abi_ulong frame_addr;
4977 abi_ulong retcode_addr;
4978 abi_ulong sc_addr;
4979 int i;
4980
4981 frame_addr = get_sigframe(ka, env, sizeof *frame);
4982 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
4983 goto give_sigsegv;
4984
4985 __put_user(sig, &frame->sig);
4986
4987 sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
4988 __put_user(sc_addr, &frame->psc);
4989
4990 setup_sigcontext(&frame->sc, env, set->sig[0]);
4991
4992 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
4993 __put_user(set->sig[i], &frame->extramask[i - 1]);
4994 }
4995
4996 /* Set up to return from userspace. */
4997
4998 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
4999 __put_user(retcode_addr, &frame->pretcode);
5000
5001 /* moveq #,d0; trap #0 */
5002
5003 __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16),
5004 (long *)(frame->retcode));
5005
5006 /* Set up to return from userspace */
5007
5008 env->aregs[7] = frame_addr;
5009 env->pc = ka->_sa_handler;
5010
5011 unlock_user_struct(frame, frame_addr, 1);
5012 return;
5013
5014 give_sigsegv:
5015 force_sig(TARGET_SIGSEGV);
5016 }
5017
5018 static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
5019 CPUM68KState *env)
5020 {
5021 target_greg_t *gregs = uc->tuc_mcontext.gregs;
5022
5023 __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version);
5024 __put_user(env->dregs[0], &gregs[0]);
5025 __put_user(env->dregs[1], &gregs[1]);
5026 __put_user(env->dregs[2], &gregs[2]);
5027 __put_user(env->dregs[3], &gregs[3]);
5028 __put_user(env->dregs[4], &gregs[4]);
5029 __put_user(env->dregs[5], &gregs[5]);
5030 __put_user(env->dregs[6], &gregs[6]);
5031 __put_user(env->dregs[7], &gregs[7]);
5032 __put_user(env->aregs[0], &gregs[8]);
5033 __put_user(env->aregs[1], &gregs[9]);
5034 __put_user(env->aregs[2], &gregs[10]);
5035 __put_user(env->aregs[3], &gregs[11]);
5036 __put_user(env->aregs[4], &gregs[12]);
5037 __put_user(env->aregs[5], &gregs[13]);
5038 __put_user(env->aregs[6], &gregs[14]);
5039 __put_user(env->aregs[7], &gregs[15]);
5040 __put_user(env->pc, &gregs[16]);
5041 __put_user(env->sr, &gregs[17]);
5042
5043 return 0;
5044 }
5045
5046 static inline int target_rt_restore_ucontext(CPUM68KState *env,
5047 struct target_ucontext *uc,
5048 int *pd0)
5049 {
5050 int temp;
5051 target_greg_t *gregs = uc->tuc_mcontext.gregs;
5052
5053 __get_user(temp, &uc->tuc_mcontext.version);
5054 if (temp != TARGET_MCONTEXT_VERSION)
5055 goto badframe;
5056
5057 /* restore passed registers */
5058 __get_user(env->dregs[0], &gregs[0]);
5059 __get_user(env->dregs[1], &gregs[1]);
5060 __get_user(env->dregs[2], &gregs[2]);
5061 __get_user(env->dregs[3], &gregs[3]);
5062 __get_user(env->dregs[4], &gregs[4]);
5063 __get_user(env->dregs[5], &gregs[5]);
5064 __get_user(env->dregs[6], &gregs[6]);
5065 __get_user(env->dregs[7], &gregs[7]);
5066 __get_user(env->aregs[0], &gregs[8]);
5067 __get_user(env->aregs[1], &gregs[9]);
5068 __get_user(env->aregs[2], &gregs[10]);
5069 __get_user(env->aregs[3], &gregs[11]);
5070 __get_user(env->aregs[4], &gregs[12]);
5071 __get_user(env->aregs[5], &gregs[13]);
5072 __get_user(env->aregs[6], &gregs[14]);
5073 __get_user(env->aregs[7], &gregs[15]);
5074 __get_user(env->pc, &gregs[16]);
5075 __get_user(temp, &gregs[17]);
5076 env->sr = (env->sr & 0xff00) | (temp & 0xff);
5077
5078 *pd0 = env->dregs[0];
5079 return 0;
5080
5081 badframe:
5082 return 1;
5083 }
5084
5085 static void setup_rt_frame(int sig, struct target_sigaction *ka,
5086 target_siginfo_t *info,
5087 target_sigset_t *set, CPUM68KState *env)
5088 {
5089 struct target_rt_sigframe *frame;
5090 abi_ulong frame_addr;
5091 abi_ulong retcode_addr;
5092 abi_ulong info_addr;
5093 abi_ulong uc_addr;
5094 int err = 0;
5095 int i;
5096
5097 frame_addr = get_sigframe(ka, env, sizeof *frame);
5098 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
5099 goto give_sigsegv;
5100
5101 __put_user(sig, &frame->sig);
5102
5103 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
5104 __put_user(info_addr, &frame->pinfo);
5105
5106 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
5107 __put_user(uc_addr, &frame->puc);
5108
5109 copy_siginfo_to_user(&frame->info, info);
5110
5111 /* Create the ucontext */
5112
5113 __put_user(0, &frame->uc.tuc_flags);
5114 __put_user(0, &frame->uc.tuc_link);
5115 __put_user(target_sigaltstack_used.ss_sp,
5116 &frame->uc.tuc_stack.ss_sp);
5117 __put_user(sas_ss_flags(env->aregs[7]),
5118 &frame->uc.tuc_stack.ss_flags);
5119 __put_user(target_sigaltstack_used.ss_size,
5120 &frame->uc.tuc_stack.ss_size);
5121 err |= target_rt_setup_ucontext(&frame->uc, env);
5122
5123 if (err)
5124 goto give_sigsegv;
5125
5126 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
5127 __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
5128 }
5129
5130 /* Set up to return from userspace. */
5131
5132 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
5133 __put_user(retcode_addr, &frame->pretcode);
5134
5135 /* moveq #,d0; notb d0; trap #0 */
5136
5137 __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
5138 (long *)(frame->retcode + 0));
5139 __put_user(0x4e40, (short *)(frame->retcode + 4));
5140
5141 if (err)
5142 goto give_sigsegv;
5143
5144 /* Set up to return from userspace */
5145
5146 env->aregs[7] = frame_addr;
5147 env->pc = ka->_sa_handler;
5148
5149 unlock_user_struct(frame, frame_addr, 1);
5150 return;
5151
5152 give_sigsegv:
5153 unlock_user_struct(frame, frame_addr, 1);
5154 force_sig(TARGET_SIGSEGV);
5155 }
5156
5157 long do_sigreturn(CPUM68KState *env)
5158 {
5159 struct target_sigframe *frame;
5160 abi_ulong frame_addr = env->aregs[7] - 4;
5161 target_sigset_t target_set;
5162 sigset_t set;
5163 int d0, i;
5164
5165 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
5166 goto badframe;
5167
5168 /* set blocked signals */
5169
5170 __get_user(target_set.sig[0], &frame->sc.sc_mask);
5171
5172 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
5173 __get_user(target_set.sig[i], &frame->extramask[i - 1]);
5174 }
5175
5176 target_to_host_sigset_internal(&set, &target_set);
5177 do_sigprocmask(SIG_SETMASK, &set, NULL);
5178
5179 /* restore registers */
5180
5181 restore_sigcontext(env, &frame->sc, &d0);
5182
5183 unlock_user_struct(frame, frame_addr, 0);
5184 return d0;
5185
5186 badframe:
5187 force_sig(TARGET_SIGSEGV);
5188 return 0;
5189 }
5190
5191 long do_rt_sigreturn(CPUM68KState *env)
5192 {
5193 struct target_rt_sigframe *frame;
5194 abi_ulong frame_addr = env->aregs[7] - 4;
5195 target_sigset_t target_set;
5196 sigset_t set;
5197 int d0;
5198
5199 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
5200 goto badframe;
5201
5202 target_to_host_sigset_internal(&set, &target_set);
5203 do_sigprocmask(SIG_SETMASK, &set, NULL);
5204
5205 /* restore registers */
5206
5207 if (target_rt_restore_ucontext(env, &frame->uc, &d0))
5208 goto badframe;
5209
5210 if (do_sigaltstack(frame_addr +
5211 offsetof(struct target_rt_sigframe, uc.tuc_stack),
5212 0, get_sp_from_cpustate(env)) == -EFAULT)
5213 goto badframe;
5214
5215 unlock_user_struct(frame, frame_addr, 0);
5216 return d0;
5217
5218 badframe:
5219 unlock_user_struct(frame, frame_addr, 0);
5220 force_sig(TARGET_SIGSEGV);
5221 return 0;
5222 }
5223
5224 #elif defined(TARGET_ALPHA)
5225
5226 struct target_sigcontext {
5227 abi_long sc_onstack;
5228 abi_long sc_mask;
5229 abi_long sc_pc;
5230 abi_long sc_ps;
5231 abi_long sc_regs[32];
5232 abi_long sc_ownedfp;
5233 abi_long sc_fpregs[32];
5234 abi_ulong sc_fpcr;
5235 abi_ulong sc_fp_control;
5236 abi_ulong sc_reserved1;
5237 abi_ulong sc_reserved2;
5238 abi_ulong sc_ssize;
5239 abi_ulong sc_sbase;
5240 abi_ulong sc_traparg_a0;
5241 abi_ulong sc_traparg_a1;
5242 abi_ulong sc_traparg_a2;
5243 abi_ulong sc_fp_trap_pc;
5244 abi_ulong sc_fp_trigger_sum;
5245 abi_ulong sc_fp_trigger_inst;
5246 };
5247
5248 struct target_ucontext {
5249 abi_ulong tuc_flags;
5250 abi_ulong tuc_link;
5251 abi_ulong tuc_osf_sigmask;
5252 target_stack_t tuc_stack;
5253 struct target_sigcontext tuc_mcontext;
5254 target_sigset_t tuc_sigmask;
5255 };
5256
5257 struct target_sigframe {
5258 struct target_sigcontext sc;
5259 unsigned int retcode[3];
5260 };
5261
5262 struct target_rt_sigframe {
5263 target_siginfo_t info;
5264 struct target_ucontext uc;
5265 unsigned int retcode[3];
5266 };
5267
5268 #define INSN_MOV_R30_R16 0x47fe0410
5269 #define INSN_LDI_R0 0x201f0000
5270 #define INSN_CALLSYS 0x00000083
5271
5272 static void setup_sigcontext(struct target_sigcontext *sc, CPUAlphaState *env,
5273 abi_ulong frame_addr, target_sigset_t *set)
5274 {
5275 int i;
5276
5277 __put_user(on_sig_stack(frame_addr), &sc->sc_onstack);
5278 __put_user(set->sig[0], &sc->sc_mask);
5279 __put_user(env->pc, &sc->sc_pc);
5280 __put_user(8, &sc->sc_ps);
5281
5282 for (i = 0; i < 31; ++i) {
5283 __put_user(env->ir[i], &sc->sc_regs[i]);
5284 }
5285 __put_user(0, &sc->sc_regs[31]);
5286
5287 for (i = 0; i < 31; ++i) {
5288 __put_user(env->fir[i], &sc->sc_fpregs[i]);
5289 }
5290 __put_user(0, &sc->sc_fpregs[31]);
5291 __put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr);
5292
5293 __put_user(0, &sc->sc_traparg_a0); /* FIXME */
5294 __put_user(0, &sc->sc_traparg_a1); /* FIXME */
5295 __put_user(0, &sc->sc_traparg_a2); /* FIXME */
5296 }
5297
5298 static void restore_sigcontext(CPUAlphaState *env,
5299 struct target_sigcontext *sc)
5300 {
5301 uint64_t fpcr;
5302 int i;
5303
5304 __get_user(env->pc, &sc->sc_pc);
5305
5306 for (i = 0; i < 31; ++i) {
5307 __get_user(env->ir[i], &sc->sc_regs[i]);
5308 }
5309 for (i = 0; i < 31; ++i) {
5310 __get_user(env->fir[i], &sc->sc_fpregs[i]);
5311 }
5312
5313 __get_user(fpcr, &sc->sc_fpcr);
5314 cpu_alpha_store_fpcr(env, fpcr);
5315 }
5316
5317 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
5318 CPUAlphaState *env,
5319 unsigned long framesize)
5320 {
5321 abi_ulong sp = env->ir[IR_SP];
5322
5323 /* This is the X/Open sanctioned signal stack switching. */
5324 if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) {
5325 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
5326 }
5327 return (sp - framesize) & -32;
5328 }
5329
5330 static void setup_frame(int sig, struct target_sigaction *ka,
5331 target_sigset_t *set, CPUAlphaState *env)
5332 {
5333 abi_ulong frame_addr, r26;
5334 struct target_sigframe *frame;
5335 int err = 0;
5336
5337 frame_addr = get_sigframe(ka, env, sizeof(*frame));
5338 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5339 goto give_sigsegv;
5340 }
5341
5342 setup_sigcontext(&frame->sc, env, frame_addr, set);
5343
5344 if (ka->sa_restorer) {
5345 r26 = ka->sa_restorer;
5346 } else {
5347 __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
5348 __put_user(INSN_LDI_R0 + TARGET_NR_sigreturn,
5349 &frame->retcode[1]);
5350 __put_user(INSN_CALLSYS, &frame->retcode[2]);
5351 /* imb() */
5352 r26 = frame_addr;
5353 }
5354
5355 unlock_user_struct(frame, frame_addr, 1);
5356
5357 if (err) {
5358 give_sigsegv:
5359 if (sig == TARGET_SIGSEGV) {
5360 ka->_sa_handler = TARGET_SIG_DFL;
5361 }
5362 force_sig(TARGET_SIGSEGV);
5363 }
5364
5365 env->ir[IR_RA] = r26;
5366 env->ir[IR_PV] = env->pc = ka->_sa_handler;
5367 env->ir[IR_A0] = sig;
5368 env->ir[IR_A1] = 0;
5369 env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc);
5370 env->ir[IR_SP] = frame_addr;
5371 }
5372
5373 static void setup_rt_frame(int sig, struct target_sigaction *ka,
5374 target_siginfo_t *info,
5375 target_sigset_t *set, CPUAlphaState *env)
5376 {
5377 abi_ulong frame_addr, r26;
5378 struct target_rt_sigframe *frame;
5379 int i, err = 0;
5380
5381 frame_addr = get_sigframe(ka, env, sizeof(*frame));
5382 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5383 goto give_sigsegv;
5384 }
5385
5386 copy_siginfo_to_user(&frame->info, info);
5387
5388 __put_user(0, &frame->uc.tuc_flags);
5389 __put_user(0, &frame->uc.tuc_link);
5390 __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask);
5391 __put_user(target_sigaltstack_used.ss_sp,
5392 &frame->uc.tuc_stack.ss_sp);
5393 __put_user(sas_ss_flags(env->ir[IR_SP]),
5394 &frame->uc.tuc_stack.ss_flags);
5395 __put_user(target_sigaltstack_used.ss_size,
5396 &frame->uc.tuc_stack.ss_size);
5397 setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set);
5398 for (i = 0; i < TARGET_NSIG_WORDS; ++i) {
5399 __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
5400 }
5401
5402 if (ka->sa_restorer) {
5403 r26 = ka->sa_restorer;
5404 } else {
5405 __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
5406 __put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn,
5407 &frame->retcode[1]);
5408 __put_user(INSN_CALLSYS, &frame->retcode[2]);
5409 /* imb(); */
5410 r26 = frame_addr;
5411 }
5412
5413 if (err) {
5414 give_sigsegv:
5415 if (sig == TARGET_SIGSEGV) {
5416 ka->_sa_handler = TARGET_SIG_DFL;
5417 }
5418 force_sig(TARGET_SIGSEGV);
5419 }
5420
5421 env->ir[IR_RA] = r26;
5422 env->ir[IR_PV] = env->pc = ka->_sa_handler;
5423 env->ir[IR_A0] = sig;
5424 env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info);
5425 env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
5426 env->ir[IR_SP] = frame_addr;
5427 }
5428
5429 long do_sigreturn(CPUAlphaState *env)
5430 {
5431 struct target_sigcontext *sc;
5432 abi_ulong sc_addr = env->ir[IR_A0];
5433 target_sigset_t target_set;
5434 sigset_t set;
5435
5436 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) {
5437 goto badframe;
5438 }
5439
5440 target_sigemptyset(&target_set);
5441 __get_user(target_set.sig[0], &sc->sc_mask);
5442
5443 target_to_host_sigset_internal(&set, &target_set);
5444 do_sigprocmask(SIG_SETMASK, &set, NULL);
5445
5446 restore_sigcontext(env, sc);
5447 unlock_user_struct(sc, sc_addr, 0);
5448 return env->ir[IR_V0];
5449
5450 badframe:
5451 force_sig(TARGET_SIGSEGV);
5452 }
5453
5454 long do_rt_sigreturn(CPUAlphaState *env)
5455 {
5456 abi_ulong frame_addr = env->ir[IR_A0];
5457 struct target_rt_sigframe *frame;
5458 sigset_t set;
5459
5460 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
5461 goto badframe;
5462 }
5463 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
5464 do_sigprocmask(SIG_SETMASK, &set, NULL);
5465
5466 restore_sigcontext(env, &frame->uc.tuc_mcontext);
5467 if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
5468 uc.tuc_stack),
5469 0, env->ir[IR_SP]) == -EFAULT) {
5470 goto badframe;
5471 }
5472
5473 unlock_user_struct(frame, frame_addr, 0);
5474 return env->ir[IR_V0];
5475
5476
5477 badframe:
5478 unlock_user_struct(frame, frame_addr, 0);
5479 force_sig(TARGET_SIGSEGV);
5480 }
5481
5482 #else
5483
5484 static void setup_frame(int sig, struct target_sigaction *ka,
5485 target_sigset_t *set, CPUArchState *env)
5486 {
5487 fprintf(stderr, "setup_frame: not implemented\n");
5488 }
5489
5490 static void setup_rt_frame(int sig, struct target_sigaction *ka,
5491 target_siginfo_t *info,
5492 target_sigset_t *set, CPUArchState *env)
5493 {
5494 fprintf(stderr, "setup_rt_frame: not implemented\n");
5495 }
5496
5497 long do_sigreturn(CPUArchState *env)
5498 {
5499 fprintf(stderr, "do_sigreturn: not implemented\n");
5500 return -TARGET_ENOSYS;
5501 }
5502
5503 long do_rt_sigreturn(CPUArchState *env)
5504 {
5505 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
5506 return -TARGET_ENOSYS;
5507 }
5508
5509 #endif
5510
5511 void process_pending_signals(CPUArchState *cpu_env)
5512 {
5513 CPUState *cpu = ENV_GET_CPU(cpu_env);
5514 int sig;
5515 abi_ulong handler;
5516 sigset_t set, old_set;
5517 target_sigset_t target_old_set;
5518 struct emulated_sigtable *k;
5519 struct target_sigaction *sa;
5520 struct sigqueue *q;
5521 TaskState *ts = cpu->opaque;
5522
5523 if (!ts->signal_pending)
5524 return;
5525
5526 /* FIXME: This is not threadsafe. */
5527 k = ts->sigtab;
5528 for(sig = 1; sig <= TARGET_NSIG; sig++) {
5529 if (k->pending)
5530 goto handle_signal;
5531 k++;
5532 }
5533 /* if no signal is pending, just return */
5534 ts->signal_pending = 0;
5535 return;
5536
5537 handle_signal:
5538 #ifdef DEBUG_SIGNAL
5539 fprintf(stderr, "qemu: process signal %d\n", sig);
5540 #endif
5541 /* dequeue signal */
5542 q = k->first;
5543 k->first = q->next;
5544 if (!k->first)
5545 k->pending = 0;
5546
5547 sig = gdb_handlesig(cpu, sig);
5548 if (!sig) {
5549 sa = NULL;
5550 handler = TARGET_SIG_IGN;
5551 } else {
5552 sa = &sigact_table[sig - 1];
5553 handler = sa->_sa_handler;
5554 }
5555
5556 if (ts->sigsegv_blocked && sig == TARGET_SIGSEGV) {
5557 /* Guest has blocked SIGSEGV but we got one anyway. Assume this
5558 * is a forced SIGSEGV (ie one the kernel handles via force_sig_info
5559 * because it got a real MMU fault), and treat as if default handler.
5560 */
5561 handler = TARGET_SIG_DFL;
5562 }
5563
5564 if (handler == TARGET_SIG_DFL) {
5565 /* default handler : ignore some signal. The other are job control or fatal */
5566 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
5567 kill(getpid(),SIGSTOP);
5568 } else if (sig != TARGET_SIGCHLD &&
5569 sig != TARGET_SIGURG &&
5570 sig != TARGET_SIGWINCH &&
5571 sig != TARGET_SIGCONT) {
5572 force_sig(sig);
5573 }
5574 } else if (handler == TARGET_SIG_IGN) {
5575 /* ignore sig */
5576 } else if (handler == TARGET_SIG_ERR) {
5577 force_sig(sig);
5578 } else {
5579 /* compute the blocked signals during the handler execution */
5580 target_to_host_sigset(&set, &sa->sa_mask);
5581 /* SA_NODEFER indicates that the current signal should not be
5582 blocked during the handler */
5583 if (!(sa->sa_flags & TARGET_SA_NODEFER))
5584 sigaddset(&set, target_to_host_signal(sig));
5585
5586 /* block signals in the handler using Linux */
5587 do_sigprocmask(SIG_BLOCK, &set, &old_set);
5588 /* save the previous blocked signal state to restore it at the
5589 end of the signal execution (see do_sigreturn) */
5590 host_to_target_sigset_internal(&target_old_set, &old_set);
5591
5592 /* if the CPU is in VM86 mode, we restore the 32 bit values */
5593 #if defined(TARGET_I386) && !defined(TARGET_X86_64)
5594 {
5595 CPUX86State *env = cpu_env;
5596 if (env->eflags & VM_MASK)
5597 save_v86_state(env);
5598 }
5599 #endif
5600 /* prepare the stack frame of the virtual CPU */
5601 #if defined(TARGET_ABI_MIPSN32) || defined(TARGET_ABI_MIPSN64)
5602 /* These targets do not have traditional signals. */
5603 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
5604 #else
5605 if (sa->sa_flags & TARGET_SA_SIGINFO)
5606 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
5607 else
5608 setup_frame(sig, sa, &target_old_set, cpu_env);
5609 #endif
5610 if (sa->sa_flags & TARGET_SA_RESETHAND)
5611 sa->_sa_handler = TARGET_SIG_DFL;
5612 }
5613 if (q != &k->info)
5614 free_sigqueue(cpu_env, q);
5615 }
QEMU Monitor Protocol