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Do not use load_seg_vm to load CS in real mode iret handling
[qemu/mini2440.git] / linux-user / signal.c
blob96409233c86806ceddd32469ef7984b2edaf91ad
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, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20 #include <stdlib.h>
21 #include <stdio.h>
22 #include <string.h>
23 #include <stdarg.h>
24 #include <unistd.h>
25 #include <signal.h>
26 #include <errno.h>
27 #include <sys/ucontext.h>
28
29 #include "qemu.h"
30 #include "target_signal.h"
31
32 //#define DEBUG_SIGNAL
33
34 struct target_sigaltstack target_sigaltstack_used = {
35 .ss_sp = 0,
36 .ss_size = 0,
37 .ss_flags = TARGET_SS_DISABLE,
38 };
39
40 static struct target_sigaction sigact_table[TARGET_NSIG];
41
42 static void host_signal_handler(int host_signum, siginfo_t *info,
43 void *puc);
44
45 static uint8_t host_to_target_signal_table[65] = {
46 [SIGHUP] = TARGET_SIGHUP,
47 [SIGINT] = TARGET_SIGINT,
48 [SIGQUIT] = TARGET_SIGQUIT,
49 [SIGILL] = TARGET_SIGILL,
50 [SIGTRAP] = TARGET_SIGTRAP,
51 [SIGABRT] = TARGET_SIGABRT,
52 /* [SIGIOT] = TARGET_SIGIOT,*/
53 [SIGBUS] = TARGET_SIGBUS,
54 [SIGFPE] = TARGET_SIGFPE,
55 [SIGKILL] = TARGET_SIGKILL,
56 [SIGUSR1] = TARGET_SIGUSR1,
57 [SIGSEGV] = TARGET_SIGSEGV,
58 [SIGUSR2] = TARGET_SIGUSR2,
59 [SIGPIPE] = TARGET_SIGPIPE,
60 [SIGALRM] = TARGET_SIGALRM,
61 [SIGTERM] = TARGET_SIGTERM,
62 #ifdef SIGSTKFLT
63 [SIGSTKFLT] = TARGET_SIGSTKFLT,
64 #endif
65 [SIGCHLD] = TARGET_SIGCHLD,
66 [SIGCONT] = TARGET_SIGCONT,
67 [SIGSTOP] = TARGET_SIGSTOP,
68 [SIGTSTP] = TARGET_SIGTSTP,
69 [SIGTTIN] = TARGET_SIGTTIN,
70 [SIGTTOU] = TARGET_SIGTTOU,
71 [SIGURG] = TARGET_SIGURG,
72 [SIGXCPU] = TARGET_SIGXCPU,
73 [SIGXFSZ] = TARGET_SIGXFSZ,
74 [SIGVTALRM] = TARGET_SIGVTALRM,
75 [SIGPROF] = TARGET_SIGPROF,
76 [SIGWINCH] = TARGET_SIGWINCH,
77 [SIGIO] = TARGET_SIGIO,
78 [SIGPWR] = TARGET_SIGPWR,
79 [SIGSYS] = TARGET_SIGSYS,
80 /* next signals stay the same */
81 /* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with
82 host libpthread signals. This assumes noone actually uses SIGRTMAX :-/
83 To fix this properly we need to do manual signal delivery multiplexed
84 over a single host signal. */
85 [__SIGRTMIN] = __SIGRTMAX,
86 [__SIGRTMAX] = __SIGRTMIN,
87 };
88 static uint8_t target_to_host_signal_table[65];
89
90 static inline int on_sig_stack(unsigned long sp)
91 {
92 return (sp - target_sigaltstack_used.ss_sp
93 < target_sigaltstack_used.ss_size);
94 }
95
96 static inline int sas_ss_flags(unsigned long sp)
97 {
98 return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE
99 : on_sig_stack(sp) ? SS_ONSTACK : 0);
100 }
101
102 static inline int host_to_target_signal(int sig)
103 {
104 if (sig > 64)
105 return sig;
106 return host_to_target_signal_table[sig];
107 }
108
109 int target_to_host_signal(int sig)
110 {
111 if (sig > 64)
112 return sig;
113 return target_to_host_signal_table[sig];
114 }
115
116 static inline void target_sigemptyset(target_sigset_t *set)
117 {
118 memset(set, 0, sizeof(*set));
119 }
120
121 static inline void target_sigaddset(target_sigset_t *set, int signum)
122 {
123 signum--;
124 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
125 set->sig[signum / TARGET_NSIG_BPW] |= mask;
126 }
127
128 static inline int target_sigismember(const target_sigset_t *set, int signum)
129 {
130 signum--;
131 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
132 return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0);
133 }
134
135 static void host_to_target_sigset_internal(target_sigset_t *d,
136 const sigset_t *s)
137 {
138 int i;
139 target_sigemptyset(d);
140 for (i = 1; i <= TARGET_NSIG; i++) {
141 if (sigismember(s, i)) {
142 target_sigaddset(d, host_to_target_signal(i));
143 }
144 }
145 }
146
147 void host_to_target_sigset(target_sigset_t *d, const sigset_t *s)
148 {
149 target_sigset_t d1;
150 int i;
151
152 host_to_target_sigset_internal(&d1, s);
153 for(i = 0;i < TARGET_NSIG_WORDS; i++)
154 d->sig[i] = tswapl(d1.sig[i]);
155 }
156
157 static void target_to_host_sigset_internal(sigset_t *d,
158 const target_sigset_t *s)
159 {
160 int i;
161 sigemptyset(d);
162 for (i = 1; i <= TARGET_NSIG; i++) {
163 if (target_sigismember(s, i)) {
164 sigaddset(d, target_to_host_signal(i));
165 }
166 }
167 }
168
169 void target_to_host_sigset(sigset_t *d, const target_sigset_t *s)
170 {
171 target_sigset_t s1;
172 int i;
173
174 for(i = 0;i < TARGET_NSIG_WORDS; i++)
175 s1.sig[i] = tswapl(s->sig[i]);
176 target_to_host_sigset_internal(d, &s1);
177 }
178
179 void host_to_target_old_sigset(abi_ulong *old_sigset,
180 const sigset_t *sigset)
181 {
182 target_sigset_t d;
183 host_to_target_sigset(&d, sigset);
184 *old_sigset = d.sig[0];
185 }
186
187 void target_to_host_old_sigset(sigset_t *sigset,
188 const abi_ulong *old_sigset)
189 {
190 target_sigset_t d;
191 int i;
192
193 d.sig[0] = *old_sigset;
194 for(i = 1;i < TARGET_NSIG_WORDS; i++)
195 d.sig[i] = 0;
196 target_to_host_sigset(sigset, &d);
197 }
198
199 /* siginfo conversion */
200
201 static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
202 const siginfo_t *info)
203 {
204 int sig;
205 sig = host_to_target_signal(info->si_signo);
206 tinfo->si_signo = sig;
207 tinfo->si_errno = 0;
208 tinfo->si_code = info->si_code;
209 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
210 sig == SIGBUS || sig == SIGTRAP) {
211 /* should never come here, but who knows. The information for
212 the target is irrelevant */
213 tinfo->_sifields._sigfault._addr = 0;
214 } else if (sig == SIGIO) {
215 tinfo->_sifields._sigpoll._fd = info->si_fd;
216 } else if (sig >= TARGET_SIGRTMIN) {
217 tinfo->_sifields._rt._pid = info->si_pid;
218 tinfo->_sifields._rt._uid = info->si_uid;
219 /* XXX: potential problem if 64 bit */
220 tinfo->_sifields._rt._sigval.sival_ptr =
221 (abi_ulong)(unsigned long)info->si_value.sival_ptr;
222 }
223 }
224
225 static void tswap_siginfo(target_siginfo_t *tinfo,
226 const target_siginfo_t *info)
227 {
228 int sig;
229 sig = info->si_signo;
230 tinfo->si_signo = tswap32(sig);
231 tinfo->si_errno = tswap32(info->si_errno);
232 tinfo->si_code = tswap32(info->si_code);
233 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
234 sig == SIGBUS || sig == SIGTRAP) {
235 tinfo->_sifields._sigfault._addr =
236 tswapl(info->_sifields._sigfault._addr);
237 } else if (sig == SIGIO) {
238 tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
239 } else if (sig >= TARGET_SIGRTMIN) {
240 tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid);
241 tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid);
242 tinfo->_sifields._rt._sigval.sival_ptr =
243 tswapl(info->_sifields._rt._sigval.sival_ptr);
244 }
245 }
246
247
248 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info)
249 {
250 host_to_target_siginfo_noswap(tinfo, info);
251 tswap_siginfo(tinfo, tinfo);
252 }
253
254 /* XXX: we support only POSIX RT signals are used. */
255 /* XXX: find a solution for 64 bit (additional malloced data is needed) */
256 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo)
257 {
258 info->si_signo = tswap32(tinfo->si_signo);
259 info->si_errno = tswap32(tinfo->si_errno);
260 info->si_code = tswap32(tinfo->si_code);
261 info->si_pid = tswap32(tinfo->_sifields._rt._pid);
262 info->si_uid = tswap32(tinfo->_sifields._rt._uid);
263 info->si_value.sival_ptr =
264 (void *)(long)tswapl(tinfo->_sifields._rt._sigval.sival_ptr);
265 }
266
267 void signal_init(void)
268 {
269 struct sigaction act;
270 struct sigaction oact;
271 int i, j;
272 int host_sig;
273
274 /* generate signal conversion tables */
275 for(i = 1; i <= 64; i++) {
276 if (host_to_target_signal_table[i] == 0)
277 host_to_target_signal_table[i] = i;
278 }
279 for(i = 1; i <= 64; i++) {
280 j = host_to_target_signal_table[i];
281 target_to_host_signal_table[j] = i;
282 }
283
284 /* set all host signal handlers. ALL signals are blocked during
285 the handlers to serialize them. */
286 memset(sigact_table, 0, sizeof(sigact_table));
287
288 sigfillset(&act.sa_mask);
289 act.sa_flags = SA_SIGINFO;
290 act.sa_sigaction = host_signal_handler;
291 for(i = 1; i <= TARGET_NSIG; i++) {
292 host_sig = target_to_host_signal(i);
293 sigaction(host_sig, NULL, &oact);
294 if (oact.sa_sigaction == (void *)SIG_IGN) {
295 sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
296 } else if (oact.sa_sigaction == (void *)SIG_DFL) {
297 sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
298 }
299 /* If there's already a handler installed then something has
300 gone horribly wrong, so don't even try to handle that case. */
301 /* Install some handlers for our own use. */
302 if (host_sig == SIGSEGV || host_sig == SIGBUS) {
303 sigaction(host_sig, &act, NULL);
304 }
305 }
306 }
307
308 /* signal queue handling */
309
310 static inline struct sigqueue *alloc_sigqueue(CPUState *env)
311 {
312 TaskState *ts = env->opaque;
313 struct sigqueue *q = ts->first_free;
314 if (!q)
315 return NULL;
316 ts->first_free = q->next;
317 return q;
318 }
319
320 static inline void free_sigqueue(CPUState *env, struct sigqueue *q)
321 {
322 TaskState *ts = env->opaque;
323 q->next = ts->first_free;
324 ts->first_free = q;
325 }
326
327 /* abort execution with signal */
328 static void __attribute((noreturn)) force_sig(int sig)
329 {
330 int host_sig;
331 host_sig = target_to_host_signal(sig);
332 fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
333 sig, strsignal(host_sig));
334 #if 1
335 _exit(-host_sig);
336 #else
337 {
338 struct sigaction act;
339 sigemptyset(&act.sa_mask);
340 act.sa_flags = SA_SIGINFO;
341 act.sa_sigaction = SIG_DFL;
342 sigaction(SIGABRT, &act, NULL);
343 abort();
344 }
345 #endif
346 }
347
348 /* queue a signal so that it will be send to the virtual CPU as soon
349 as possible */
350 int queue_signal(CPUState *env, int sig, target_siginfo_t *info)
351 {
352 TaskState *ts = env->opaque;
353 struct emulated_sigtable *k;
354 struct sigqueue *q, **pq;
355 abi_ulong handler;
356
357 #if defined(DEBUG_SIGNAL)
358 fprintf(stderr, "queue_signal: sig=%d\n",
359 sig);
360 #endif
361 k = &ts->sigtab[sig - 1];
362 handler = sigact_table[sig - 1]._sa_handler;
363 if (handler == TARGET_SIG_DFL) {
364 /* default handler : ignore some signal. The other are fatal */
365 if (sig != TARGET_SIGCHLD &&
366 sig != TARGET_SIGURG &&
367 sig != TARGET_SIGWINCH) {
368 force_sig(sig);
369 } else {
370 return 0; /* indicate ignored */
371 }
372 } else if (handler == TARGET_SIG_IGN) {
373 /* ignore signal */
374 return 0;
375 } else if (handler == TARGET_SIG_ERR) {
376 force_sig(sig);
377 } else {
378 pq = &k->first;
379 if (sig < TARGET_SIGRTMIN) {
380 /* if non real time signal, we queue exactly one signal */
381 if (!k->pending)
382 q = &k->info;
383 else
384 return 0;
385 } else {
386 if (!k->pending) {
387 /* first signal */
388 q = &k->info;
389 } else {
390 q = alloc_sigqueue(env);
391 if (!q)
392 return -EAGAIN;
393 while (*pq != NULL)
394 pq = &(*pq)->next;
395 }
396 }
397 *pq = q;
398 q->info = *info;
399 q->next = NULL;
400 k->pending = 1;
401 /* signal that a new signal is pending */
402 ts->signal_pending = 1;
403 return 1; /* indicates that the signal was queued */
404 }
405 }
406
407 static void host_signal_handler(int host_signum, siginfo_t *info,
408 void *puc)
409 {
410 int sig;
411 target_siginfo_t tinfo;
412
413 /* the CPU emulator uses some host signals to detect exceptions,
414 we we forward to it some signals */
415 if (host_signum == SIGSEGV || host_signum == SIGBUS) {
416 if (cpu_signal_handler(host_signum, info, puc))
417 return;
418 }
419
420 /* get target signal number */
421 sig = host_to_target_signal(host_signum);
422 if (sig < 1 || sig > TARGET_NSIG)
423 return;
424 #if defined(DEBUG_SIGNAL)
425 fprintf(stderr, "qemu: got signal %d\n", sig);
426 #endif
427 host_to_target_siginfo_noswap(&tinfo, info);
428 if (queue_signal(thread_env, sig, &tinfo) == 1) {
429 /* interrupt the virtual CPU as soon as possible */
430 cpu_interrupt(thread_env, CPU_INTERRUPT_EXIT);
431 }
432 }
433
434 /* do_sigaltstack() returns target values and errnos. */
435 /* compare linux/kernel/signal.c:do_sigaltstack() */
436 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
437 {
438 int ret;
439 struct target_sigaltstack oss;
440
441 /* XXX: test errors */
442 if(uoss_addr)
443 {
444 __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
445 __put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
446 __put_user(sas_ss_flags(sp), &oss.ss_flags);
447 }
448
449 if(uss_addr)
450 {
451 struct target_sigaltstack *uss;
452 struct target_sigaltstack ss;
453
454 ret = -TARGET_EFAULT;
455 if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)
456 || __get_user(ss.ss_sp, &uss->ss_sp)
457 || __get_user(ss.ss_size, &uss->ss_size)
458 || __get_user(ss.ss_flags, &uss->ss_flags))
459 goto out;
460 unlock_user_struct(uss, uss_addr, 0);
461
462 ret = -TARGET_EPERM;
463 if (on_sig_stack(sp))
464 goto out;
465
466 ret = -TARGET_EINVAL;
467 if (ss.ss_flags != TARGET_SS_DISABLE
468 && ss.ss_flags != TARGET_SS_ONSTACK
469 && ss.ss_flags != 0)
470 goto out;
471
472 if (ss.ss_flags == TARGET_SS_DISABLE) {
473 ss.ss_size = 0;
474 ss.ss_sp = 0;
475 } else {
476 ret = -TARGET_ENOMEM;
477 if (ss.ss_size < MINSIGSTKSZ)
478 goto out;
479 }
480
481 target_sigaltstack_used.ss_sp = ss.ss_sp;
482 target_sigaltstack_used.ss_size = ss.ss_size;
483 }
484
485 if (uoss_addr) {
486 ret = -TARGET_EFAULT;
487 if (copy_to_user(uoss_addr, &oss, sizeof(oss)))
488 goto out;
489 }
490
491 ret = 0;
492 out:
493 return ret;
494 }
495
496 /* do_sigaction() return host values and errnos */
497 int do_sigaction(int sig, const struct target_sigaction *act,
498 struct target_sigaction *oact)
499 {
500 struct target_sigaction *k;
501 struct sigaction act1;
502 int host_sig;
503 int ret = 0;
504
505 if (sig < 1 || sig > TARGET_NSIG || sig == SIGKILL || sig == SIGSTOP)
506 return -EINVAL;
507 k = &sigact_table[sig - 1];
508 #if defined(DEBUG_SIGNAL)
509 fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
510 sig, (int)act, (int)oact);
511 #endif
512 if (oact) {
513 oact->_sa_handler = tswapl(k->_sa_handler);
514 oact->sa_flags = tswapl(k->sa_flags);
515 #if !defined(TARGET_MIPS)
516 oact->sa_restorer = tswapl(k->sa_restorer);
517 #endif
518 oact->sa_mask = k->sa_mask;
519 }
520 if (act) {
521 /* FIXME: This is not threadsafe. */
522 k->_sa_handler = tswapl(act->_sa_handler);
523 k->sa_flags = tswapl(act->sa_flags);
524 #if !defined(TARGET_MIPS)
525 k->sa_restorer = tswapl(act->sa_restorer);
526 #endif
527 k->sa_mask = act->sa_mask;
528
529 /* we update the host linux signal state */
530 host_sig = target_to_host_signal(sig);
531 if (host_sig != SIGSEGV && host_sig != SIGBUS) {
532 sigfillset(&act1.sa_mask);
533 act1.sa_flags = SA_SIGINFO;
534 if (k->sa_flags & TARGET_SA_RESTART)
535 act1.sa_flags |= SA_RESTART;
536 /* NOTE: it is important to update the host kernel signal
537 ignore state to avoid getting unexpected interrupted
538 syscalls */
539 if (k->_sa_handler == TARGET_SIG_IGN) {
540 act1.sa_sigaction = (void *)SIG_IGN;
541 } else if (k->_sa_handler == TARGET_SIG_DFL) {
542 act1.sa_sigaction = (void *)SIG_DFL;
543 } else {
544 act1.sa_sigaction = host_signal_handler;
545 }
546 ret = sigaction(host_sig, &act1, NULL);
547 }
548 }
549 return ret;
550 }
551
552 static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
553 const target_siginfo_t *info)
554 {
555 tswap_siginfo(tinfo, info);
556 return 0;
557 }
558
559 static inline int current_exec_domain_sig(int sig)
560 {
561 return /* current->exec_domain && current->exec_domain->signal_invmap
562 && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
563 }
564
565 #if defined(TARGET_I386) && TARGET_ABI_BITS == 32
566
567 /* from the Linux kernel */
568
569 struct target_fpreg {
570 uint16_t significand[4];
571 uint16_t exponent;
572 };
573
574 struct target_fpxreg {
575 uint16_t significand[4];
576 uint16_t exponent;
577 uint16_t padding[3];
578 };
579
580 struct target_xmmreg {
581 abi_ulong element[4];
582 };
583
584 struct target_fpstate {
585 /* Regular FPU environment */
586 abi_ulong cw;
587 abi_ulong sw;
588 abi_ulong tag;
589 abi_ulong ipoff;
590 abi_ulong cssel;
591 abi_ulong dataoff;
592 abi_ulong datasel;
593 struct target_fpreg _st[8];
594 uint16_t status;
595 uint16_t magic; /* 0xffff = regular FPU data only */
596
597 /* FXSR FPU environment */
598 abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
599 abi_ulong mxcsr;
600 abi_ulong reserved;
601 struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
602 struct target_xmmreg _xmm[8];
603 abi_ulong padding[56];
604 };
605
606 #define X86_FXSR_MAGIC 0x0000
607
608 struct target_sigcontext {
609 uint16_t gs, __gsh;
610 uint16_t fs, __fsh;
611 uint16_t es, __esh;
612 uint16_t ds, __dsh;
613 abi_ulong edi;
614 abi_ulong esi;
615 abi_ulong ebp;
616 abi_ulong esp;
617 abi_ulong ebx;
618 abi_ulong edx;
619 abi_ulong ecx;
620 abi_ulong eax;
621 abi_ulong trapno;
622 abi_ulong err;
623 abi_ulong eip;
624 uint16_t cs, __csh;
625 abi_ulong eflags;
626 abi_ulong esp_at_signal;
627 uint16_t ss, __ssh;
628 abi_ulong fpstate; /* pointer */
629 abi_ulong oldmask;
630 abi_ulong cr2;
631 };
632
633 struct target_ucontext {
634 abi_ulong tuc_flags;
635 abi_ulong tuc_link;
636 target_stack_t tuc_stack;
637 struct target_sigcontext tuc_mcontext;
638 target_sigset_t tuc_sigmask; /* mask last for extensibility */
639 };
640
641 struct sigframe
642 {
643 abi_ulong pretcode;
644 int sig;
645 struct target_sigcontext sc;
646 struct target_fpstate fpstate;
647 abi_ulong extramask[TARGET_NSIG_WORDS-1];
648 char retcode[8];
649 };
650
651 struct rt_sigframe
652 {
653 abi_ulong pretcode;
654 int sig;
655 abi_ulong pinfo;
656 abi_ulong puc;
657 struct target_siginfo info;
658 struct target_ucontext uc;
659 struct target_fpstate fpstate;
660 char retcode[8];
661 };
662
663 /*
664 * Set up a signal frame.
665 */
666
667 /* XXX: save x87 state */
668 static int
669 setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
670 CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr)
671 {
672 int err = 0;
673 uint16_t magic;
674
675 /* already locked in setup_frame() */
676 err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
677 err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
678 err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
679 err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
680 err |= __put_user(env->regs[R_EDI], &sc->edi);
681 err |= __put_user(env->regs[R_ESI], &sc->esi);
682 err |= __put_user(env->regs[R_EBP], &sc->ebp);
683 err |= __put_user(env->regs[R_ESP], &sc->esp);
684 err |= __put_user(env->regs[R_EBX], &sc->ebx);
685 err |= __put_user(env->regs[R_EDX], &sc->edx);
686 err |= __put_user(env->regs[R_ECX], &sc->ecx);
687 err |= __put_user(env->regs[R_EAX], &sc->eax);
688 err |= __put_user(env->exception_index, &sc->trapno);
689 err |= __put_user(env->error_code, &sc->err);
690 err |= __put_user(env->eip, &sc->eip);
691 err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
692 err |= __put_user(env->eflags, &sc->eflags);
693 err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
694 err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
695
696 cpu_x86_fsave(env, fpstate_addr, 1);
697 fpstate->status = fpstate->sw;
698 magic = 0xffff;
699 err |= __put_user(magic, &fpstate->magic);
700 err |= __put_user(fpstate_addr, &sc->fpstate);
701
702 /* non-iBCS2 extensions.. */
703 err |= __put_user(mask, &sc->oldmask);
704 err |= __put_user(env->cr[2], &sc->cr2);
705 return err;
706 }
707
708 /*
709 * Determine which stack to use..
710 */
711
712 static inline abi_ulong
713 get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
714 {
715 unsigned long esp;
716
717 /* Default to using normal stack */
718 esp = env->regs[R_ESP];
719 /* This is the X/Open sanctioned signal stack switching. */
720 if (ka->sa_flags & TARGET_SA_ONSTACK) {
721 if (sas_ss_flags(esp) == 0)
722 esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
723 }
724
725 /* This is the legacy signal stack switching. */
726 else
727 if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
728 !(ka->sa_flags & TARGET_SA_RESTORER) &&
729 ka->sa_restorer) {
730 esp = (unsigned long) ka->sa_restorer;
731 }
732 return (esp - frame_size) & -8ul;
733 }
734
735 /* compare linux/arch/i386/kernel/signal.c:setup_frame() */
736 static void setup_frame(int sig, struct target_sigaction *ka,
737 target_sigset_t *set, CPUX86State *env)
738 {
739 abi_ulong frame_addr;
740 struct sigframe *frame;
741 int i, err = 0;
742
743 frame_addr = get_sigframe(ka, env, sizeof(*frame));
744
745 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
746 goto give_sigsegv;
747
748 err |= __put_user(current_exec_domain_sig(sig),
749 &frame->sig);
750 if (err)
751 goto give_sigsegv;
752
753 setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
754 frame_addr + offsetof(struct sigframe, fpstate));
755 if (err)
756 goto give_sigsegv;
757
758 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
759 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
760 goto give_sigsegv;
761 }
762
763 /* Set up to return from userspace. If provided, use a stub
764 already in userspace. */
765 if (ka->sa_flags & TARGET_SA_RESTORER) {
766 err |= __put_user(ka->sa_restorer, &frame->pretcode);
767 } else {
768 uint16_t val16;
769 abi_ulong retcode_addr;
770 retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
771 err |= __put_user(retcode_addr, &frame->pretcode);
772 /* This is popl %eax ; movl $,%eax ; int $0x80 */
773 val16 = 0xb858;
774 err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
775 err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
776 val16 = 0x80cd;
777 err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
778 }
779
780 if (err)
781 goto give_sigsegv;
782
783 /* Set up registers for signal handler */
784 env->regs[R_ESP] = frame_addr;
785 env->eip = ka->_sa_handler;
786
787 cpu_x86_load_seg(env, R_DS, __USER_DS);
788 cpu_x86_load_seg(env, R_ES, __USER_DS);
789 cpu_x86_load_seg(env, R_SS, __USER_DS);
790 cpu_x86_load_seg(env, R_CS, __USER_CS);
791 env->eflags &= ~TF_MASK;
792
793 unlock_user_struct(frame, frame_addr, 1);
794
795 return;
796
797 give_sigsegv:
798 unlock_user_struct(frame, frame_addr, 1);
799 if (sig == TARGET_SIGSEGV)
800 ka->_sa_handler = TARGET_SIG_DFL;
801 force_sig(TARGET_SIGSEGV /* , current */);
802 }
803
804 /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
805 static void setup_rt_frame(int sig, struct target_sigaction *ka,
806 target_siginfo_t *info,
807 target_sigset_t *set, CPUX86State *env)
808 {
809 abi_ulong frame_addr, addr;
810 struct rt_sigframe *frame;
811 int i, err = 0;
812
813 frame_addr = get_sigframe(ka, env, sizeof(*frame));
814
815 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
816 goto give_sigsegv;
817
818 err |= __put_user(current_exec_domain_sig(sig),
819 &frame->sig);
820 addr = frame_addr + offsetof(struct rt_sigframe, info);
821 err |= __put_user(addr, &frame->pinfo);
822 addr = frame_addr + offsetof(struct rt_sigframe, uc);
823 err |= __put_user(addr, &frame->puc);
824 err |= copy_siginfo_to_user(&frame->info, info);
825 if (err)
826 goto give_sigsegv;
827
828 /* Create the ucontext. */
829 err |= __put_user(0, &frame->uc.tuc_flags);
830 err |= __put_user(0, &frame->uc.tuc_link);
831 err |= __put_user(target_sigaltstack_used.ss_sp,
832 &frame->uc.tuc_stack.ss_sp);
833 err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
834 &frame->uc.tuc_stack.ss_flags);
835 err |= __put_user(target_sigaltstack_used.ss_size,
836 &frame->uc.tuc_stack.ss_size);
837 err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
838 env, set->sig[0],
839 frame_addr + offsetof(struct rt_sigframe, fpstate));
840 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
841 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
842 goto give_sigsegv;
843 }
844
845 /* Set up to return from userspace. If provided, use a stub
846 already in userspace. */
847 if (ka->sa_flags & TARGET_SA_RESTORER) {
848 err |= __put_user(ka->sa_restorer, &frame->pretcode);
849 } else {
850 uint16_t val16;
851 addr = frame_addr + offsetof(struct rt_sigframe, retcode);
852 err |= __put_user(addr, &frame->pretcode);
853 /* This is movl $,%eax ; int $0x80 */
854 err |= __put_user(0xb8, (char *)(frame->retcode+0));
855 err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
856 val16 = 0x80cd;
857 err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
858 }
859
860 if (err)
861 goto give_sigsegv;
862
863 /* Set up registers for signal handler */
864 env->regs[R_ESP] = frame_addr;
865 env->eip = ka->_sa_handler;
866
867 cpu_x86_load_seg(env, R_DS, __USER_DS);
868 cpu_x86_load_seg(env, R_ES, __USER_DS);
869 cpu_x86_load_seg(env, R_SS, __USER_DS);
870 cpu_x86_load_seg(env, R_CS, __USER_CS);
871 env->eflags &= ~TF_MASK;
872
873 unlock_user_struct(frame, frame_addr, 1);
874
875 return;
876
877 give_sigsegv:
878 unlock_user_struct(frame, frame_addr, 1);
879 if (sig == TARGET_SIGSEGV)
880 ka->_sa_handler = TARGET_SIG_DFL;
881 force_sig(TARGET_SIGSEGV /* , current */);
882 }
883
884 static int
885 restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
886 {
887 unsigned int err = 0;
888 abi_ulong fpstate_addr;
889 unsigned int tmpflags;
890
891 cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
892 cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
893 cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
894 cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
895
896 env->regs[R_EDI] = tswapl(sc->edi);
897 env->regs[R_ESI] = tswapl(sc->esi);
898 env->regs[R_EBP] = tswapl(sc->ebp);
899 env->regs[R_ESP] = tswapl(sc->esp);
900 env->regs[R_EBX] = tswapl(sc->ebx);
901 env->regs[R_EDX] = tswapl(sc->edx);
902 env->regs[R_ECX] = tswapl(sc->ecx);
903 env->eip = tswapl(sc->eip);
904
905 cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
906 cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
907
908 tmpflags = tswapl(sc->eflags);
909 env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
910 // regs->orig_eax = -1; /* disable syscall checks */
911
912 fpstate_addr = tswapl(sc->fpstate);
913 if (fpstate_addr != 0) {
914 if (!access_ok(VERIFY_READ, fpstate_addr,
915 sizeof(struct target_fpstate)))
916 goto badframe;
917 cpu_x86_frstor(env, fpstate_addr, 1);
918 }
919
920 *peax = tswapl(sc->eax);
921 return err;
922 badframe:
923 return 1;
924 }
925
926 long do_sigreturn(CPUX86State *env)
927 {
928 struct sigframe *frame;
929 abi_ulong frame_addr = env->regs[R_ESP] - 8;
930 target_sigset_t target_set;
931 sigset_t set;
932 int eax, i;
933
934 #if defined(DEBUG_SIGNAL)
935 fprintf(stderr, "do_sigreturn\n");
936 #endif
937 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
938 goto badframe;
939 /* set blocked signals */
940 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
941 goto badframe;
942 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
943 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
944 goto badframe;
945 }
946
947 target_to_host_sigset_internal(&set, &target_set);
948 sigprocmask(SIG_SETMASK, &set, NULL);
949
950 /* restore registers */
951 if (restore_sigcontext(env, &frame->sc, &eax))
952 goto badframe;
953 unlock_user_struct(frame, frame_addr, 0);
954 return eax;
955
956 badframe:
957 unlock_user_struct(frame, frame_addr, 0);
958 force_sig(TARGET_SIGSEGV);
959 return 0;
960 }
961
962 long do_rt_sigreturn(CPUX86State *env)
963 {
964 abi_ulong frame_addr;
965 struct rt_sigframe *frame;
966 sigset_t set;
967 int eax;
968
969 frame_addr = env->regs[R_ESP] - 4;
970 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
971 goto badframe;
972 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
973 sigprocmask(SIG_SETMASK, &set, NULL);
974
975 if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
976 goto badframe;
977
978 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
979 get_sp_from_cpustate(env)) == -EFAULT)
980 goto badframe;
981
982 unlock_user_struct(frame, frame_addr, 0);
983 return eax;
984
985 badframe:
986 unlock_user_struct(frame, frame_addr, 0);
987 force_sig(TARGET_SIGSEGV);
988 return 0;
989 }
990
991 #elif defined(TARGET_ARM)
992
993 struct target_sigcontext {
994 abi_ulong trap_no;
995 abi_ulong error_code;
996 abi_ulong oldmask;
997 abi_ulong arm_r0;
998 abi_ulong arm_r1;
999 abi_ulong arm_r2;
1000 abi_ulong arm_r3;
1001 abi_ulong arm_r4;
1002 abi_ulong arm_r5;
1003 abi_ulong arm_r6;
1004 abi_ulong arm_r7;
1005 abi_ulong arm_r8;
1006 abi_ulong arm_r9;
1007 abi_ulong arm_r10;
1008 abi_ulong arm_fp;
1009 abi_ulong arm_ip;
1010 abi_ulong arm_sp;
1011 abi_ulong arm_lr;
1012 abi_ulong arm_pc;
1013 abi_ulong arm_cpsr;
1014 abi_ulong fault_address;
1015 };
1016
1017 struct target_ucontext_v1 {
1018 abi_ulong tuc_flags;
1019 abi_ulong tuc_link;
1020 target_stack_t tuc_stack;
1021 struct target_sigcontext tuc_mcontext;
1022 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1023 };
1024
1025 struct target_ucontext_v2 {
1026 abi_ulong tuc_flags;
1027 abi_ulong tuc_link;
1028 target_stack_t tuc_stack;
1029 struct target_sigcontext tuc_mcontext;
1030 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1031 char __unused[128 - sizeof(sigset_t)];
1032 abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
1033 };
1034
1035 struct sigframe_v1
1036 {
1037 struct target_sigcontext sc;
1038 abi_ulong extramask[TARGET_NSIG_WORDS-1];
1039 abi_ulong retcode;
1040 };
1041
1042 struct sigframe_v2
1043 {
1044 struct target_ucontext_v2 uc;
1045 abi_ulong retcode;
1046 };
1047
1048 struct rt_sigframe_v1
1049 {
1050 abi_ulong pinfo;
1051 abi_ulong puc;
1052 struct target_siginfo info;
1053 struct target_ucontext_v1 uc;
1054 abi_ulong retcode;
1055 };
1056
1057 struct rt_sigframe_v2
1058 {
1059 struct target_siginfo info;
1060 struct target_ucontext_v2 uc;
1061 abi_ulong retcode;
1062 };
1063
1064 #define TARGET_CONFIG_CPU_32 1
1065
1066 /*
1067 * For ARM syscalls, we encode the syscall number into the instruction.
1068 */
1069 #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
1070 #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
1071
1072 /*
1073 * For Thumb syscalls, we pass the syscall number via r7. We therefore
1074 * need two 16-bit instructions.
1075 */
1076 #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
1077 #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
1078
1079 static const abi_ulong retcodes[4] = {
1080 SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
1081 SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
1082 };
1083
1084
1085 #define __get_user_error(x,p,e) __get_user(x, p)
1086
1087 static inline int valid_user_regs(CPUState *regs)
1088 {
1089 return 1;
1090 }
1091
1092 static void
1093 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1094 CPUState *env, abi_ulong mask)
1095 {
1096 __put_user(env->regs[0], &sc->arm_r0);
1097 __put_user(env->regs[1], &sc->arm_r1);
1098 __put_user(env->regs[2], &sc->arm_r2);
1099 __put_user(env->regs[3], &sc->arm_r3);
1100 __put_user(env->regs[4], &sc->arm_r4);
1101 __put_user(env->regs[5], &sc->arm_r5);
1102 __put_user(env->regs[6], &sc->arm_r6);
1103 __put_user(env->regs[7], &sc->arm_r7);
1104 __put_user(env->regs[8], &sc->arm_r8);
1105 __put_user(env->regs[9], &sc->arm_r9);
1106 __put_user(env->regs[10], &sc->arm_r10);
1107 __put_user(env->regs[11], &sc->arm_fp);
1108 __put_user(env->regs[12], &sc->arm_ip);
1109 __put_user(env->regs[13], &sc->arm_sp);
1110 __put_user(env->regs[14], &sc->arm_lr);
1111 __put_user(env->regs[15], &sc->arm_pc);
1112 #ifdef TARGET_CONFIG_CPU_32
1113 __put_user(cpsr_read(env), &sc->arm_cpsr);
1114 #endif
1115
1116 __put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
1117 __put_user(/* current->thread.error_code */ 0, &sc->error_code);
1118 __put_user(/* current->thread.address */ 0, &sc->fault_address);
1119 __put_user(mask, &sc->oldmask);
1120 }
1121
1122 static inline abi_ulong
1123 get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize)
1124 {
1125 unsigned long sp = regs->regs[13];
1126
1127 /*
1128 * This is the X/Open sanctioned signal stack switching.
1129 */
1130 if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
1131 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1132 /*
1133 * ATPCS B01 mandates 8-byte alignment
1134 */
1135 return (sp - framesize) & ~7;
1136 }
1137
1138 static int
1139 setup_return(CPUState *env, struct target_sigaction *ka,
1140 abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
1141 {
1142 abi_ulong handler = ka->_sa_handler;
1143 abi_ulong retcode;
1144 int thumb = handler & 1;
1145
1146 if (ka->sa_flags & TARGET_SA_RESTORER) {
1147 retcode = ka->sa_restorer;
1148 } else {
1149 unsigned int idx = thumb;
1150
1151 if (ka->sa_flags & TARGET_SA_SIGINFO)
1152 idx += 2;
1153
1154 if (__put_user(retcodes[idx], rc))
1155 return 1;
1156 #if 0
1157 flush_icache_range((abi_ulong)rc,
1158 (abi_ulong)(rc + 1));
1159 #endif
1160 retcode = rc_addr + thumb;
1161 }
1162
1163 env->regs[0] = usig;
1164 env->regs[13] = frame_addr;
1165 env->regs[14] = retcode;
1166 env->regs[15] = handler & (thumb ? ~1 : ~3);
1167 env->thumb = thumb;
1168
1169 #if 0
1170 #ifdef TARGET_CONFIG_CPU_32
1171 env->cpsr = cpsr;
1172 #endif
1173 #endif
1174
1175 return 0;
1176 }
1177
1178 static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
1179 target_sigset_t *set, CPUState *env)
1180 {
1181 struct target_sigaltstack stack;
1182 int i;
1183
1184 /* Clear all the bits of the ucontext we don't use. */
1185 memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
1186
1187 memset(&stack, 0, sizeof(stack));
1188 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1189 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1190 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1191 memcpy(&uc->tuc_stack, &stack, sizeof(stack));
1192
1193 setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
1194 /* FIXME: Save coprocessor signal frame. */
1195 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1196 __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
1197 }
1198 }
1199
1200 /* compare linux/arch/arm/kernel/signal.c:setup_frame() */
1201 static void setup_frame_v1(int usig, struct target_sigaction *ka,
1202 target_sigset_t *set, CPUState *regs)
1203 {
1204 struct sigframe_v1 *frame;
1205 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1206 int i;
1207
1208 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1209 return;
1210
1211 setup_sigcontext(&frame->sc, regs, set->sig[0]);
1212
1213 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1214 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
1215 goto end;
1216 }
1217
1218 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1219 frame_addr + offsetof(struct sigframe_v1, retcode));
1220
1221 end:
1222 unlock_user_struct(frame, frame_addr, 1);
1223 }
1224
1225 static void setup_frame_v2(int usig, struct target_sigaction *ka,
1226 target_sigset_t *set, CPUState *regs)
1227 {
1228 struct sigframe_v2 *frame;
1229 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1230
1231 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1232 return;
1233
1234 setup_sigframe_v2(&frame->uc, set, regs);
1235
1236 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1237 frame_addr + offsetof(struct sigframe_v2, retcode));
1238
1239 unlock_user_struct(frame, frame_addr, 1);
1240 }
1241
1242 static void setup_frame(int usig, struct target_sigaction *ka,
1243 target_sigset_t *set, CPUState *regs)
1244 {
1245 if (get_osversion() >= 0x020612) {
1246 setup_frame_v2(usig, ka, set, regs);
1247 } else {
1248 setup_frame_v1(usig, ka, set, regs);
1249 }
1250 }
1251
1252 /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
1253 static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
1254 target_siginfo_t *info,
1255 target_sigset_t *set, CPUState *env)
1256 {
1257 struct rt_sigframe_v1 *frame;
1258 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1259 struct target_sigaltstack stack;
1260 int i;
1261 abi_ulong info_addr, uc_addr;
1262
1263 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1264 return /* 1 */;
1265
1266 info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
1267 __put_user(info_addr, &frame->pinfo);
1268 uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
1269 __put_user(uc_addr, &frame->puc);
1270 copy_siginfo_to_user(&frame->info, info);
1271
1272 /* Clear all the bits of the ucontext we don't use. */
1273 memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
1274
1275 memset(&stack, 0, sizeof(stack));
1276 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1277 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1278 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1279 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
1280
1281 setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
1282 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1283 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
1284 goto end;
1285 }
1286
1287 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1288 frame_addr + offsetof(struct rt_sigframe_v1, retcode));
1289
1290 env->regs[1] = info_addr;
1291 env->regs[2] = uc_addr;
1292
1293 end:
1294 unlock_user_struct(frame, frame_addr, 1);
1295 }
1296
1297 static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
1298 target_siginfo_t *info,
1299 target_sigset_t *set, CPUState *env)
1300 {
1301 struct rt_sigframe_v2 *frame;
1302 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1303 abi_ulong info_addr, uc_addr;
1304
1305 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1306 return /* 1 */;
1307
1308 info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
1309 uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
1310 copy_siginfo_to_user(&frame->info, info);
1311
1312 setup_sigframe_v2(&frame->uc, set, env);
1313
1314 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1315 frame_addr + offsetof(struct rt_sigframe_v2, retcode));
1316
1317 env->regs[1] = info_addr;
1318 env->regs[2] = uc_addr;
1319
1320 unlock_user_struct(frame, frame_addr, 1);
1321 }
1322
1323 static void setup_rt_frame(int usig, struct target_sigaction *ka,
1324 target_siginfo_t *info,
1325 target_sigset_t *set, CPUState *env)
1326 {
1327 if (get_osversion() >= 0x020612) {
1328 setup_rt_frame_v2(usig, ka, info, set, env);
1329 } else {
1330 setup_rt_frame_v1(usig, ka, info, set, env);
1331 }
1332 }
1333
1334 static int
1335 restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
1336 {
1337 int err = 0;
1338 uint32_t cpsr;
1339
1340 __get_user_error(env->regs[0], &sc->arm_r0, err);
1341 __get_user_error(env->regs[1], &sc->arm_r1, err);
1342 __get_user_error(env->regs[2], &sc->arm_r2, err);
1343 __get_user_error(env->regs[3], &sc->arm_r3, err);
1344 __get_user_error(env->regs[4], &sc->arm_r4, err);
1345 __get_user_error(env->regs[5], &sc->arm_r5, err);
1346 __get_user_error(env->regs[6], &sc->arm_r6, err);
1347 __get_user_error(env->regs[7], &sc->arm_r7, err);
1348 __get_user_error(env->regs[8], &sc->arm_r8, err);
1349 __get_user_error(env->regs[9], &sc->arm_r9, err);
1350 __get_user_error(env->regs[10], &sc->arm_r10, err);
1351 __get_user_error(env->regs[11], &sc->arm_fp, err);
1352 __get_user_error(env->regs[12], &sc->arm_ip, err);
1353 __get_user_error(env->regs[13], &sc->arm_sp, err);
1354 __get_user_error(env->regs[14], &sc->arm_lr, err);
1355 __get_user_error(env->regs[15], &sc->arm_pc, err);
1356 #ifdef TARGET_CONFIG_CPU_32
1357 __get_user_error(cpsr, &sc->arm_cpsr, err);
1358 cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC);
1359 #endif
1360
1361 err |= !valid_user_regs(env);
1362
1363 return err;
1364 }
1365
1366 long do_sigreturn_v1(CPUState *env)
1367 {
1368 abi_ulong frame_addr;
1369 struct sigframe_v1 *frame;
1370 target_sigset_t set;
1371 sigset_t host_set;
1372 int i;
1373
1374 /*
1375 * Since we stacked the signal on a 64-bit boundary,
1376 * then 'sp' should be word aligned here. If it's
1377 * not, then the user is trying to mess with us.
1378 */
1379 if (env->regs[13] & 7)
1380 goto badframe;
1381
1382 frame_addr = env->regs[13];
1383 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1384 goto badframe;
1385
1386 if (__get_user(set.sig[0], &frame->sc.oldmask))
1387 goto badframe;
1388 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1389 if (__get_user(set.sig[i], &frame->extramask[i - 1]))
1390 goto badframe;
1391 }
1392
1393 target_to_host_sigset_internal(&host_set, &set);
1394 sigprocmask(SIG_SETMASK, &host_set, NULL);
1395
1396 if (restore_sigcontext(env, &frame->sc))
1397 goto badframe;
1398
1399 #if 0
1400 /* Send SIGTRAP if we're single-stepping */
1401 if (ptrace_cancel_bpt(current))
1402 send_sig(SIGTRAP, current, 1);
1403 #endif
1404 unlock_user_struct(frame, frame_addr, 0);
1405 return env->regs[0];
1406
1407 badframe:
1408 unlock_user_struct(frame, frame_addr, 0);
1409 force_sig(SIGSEGV /* , current */);
1410 return 0;
1411 }
1412
1413 static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr,
1414 struct target_ucontext_v2 *uc)
1415 {
1416 sigset_t host_set;
1417
1418 target_to_host_sigset(&host_set, &uc->tuc_sigmask);
1419 sigprocmask(SIG_SETMASK, &host_set, NULL);
1420
1421 if (restore_sigcontext(env, &uc->tuc_mcontext))
1422 return 1;
1423
1424 if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1425 return 1;
1426
1427 #if 0
1428 /* Send SIGTRAP if we're single-stepping */
1429 if (ptrace_cancel_bpt(current))
1430 send_sig(SIGTRAP, current, 1);
1431 #endif
1432
1433 return 0;
1434 }
1435
1436 long do_sigreturn_v2(CPUState *env)
1437 {
1438 abi_ulong frame_addr;
1439 struct sigframe_v2 *frame;
1440
1441 /*
1442 * Since we stacked the signal on a 64-bit boundary,
1443 * then 'sp' should be word aligned here. If it's
1444 * not, then the user is trying to mess with us.
1445 */
1446 if (env->regs[13] & 7)
1447 goto badframe;
1448
1449 frame_addr = env->regs[13];
1450 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1451 goto badframe;
1452
1453 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1454 goto badframe;
1455
1456 unlock_user_struct(frame, frame_addr, 0);
1457 return env->regs[0];
1458
1459 badframe:
1460 unlock_user_struct(frame, frame_addr, 0);
1461 force_sig(SIGSEGV /* , current */);
1462 return 0;
1463 }
1464
1465 long do_sigreturn(CPUState *env)
1466 {
1467 if (get_osversion() >= 0x020612) {
1468 return do_sigreturn_v2(env);
1469 } else {
1470 return do_sigreturn_v1(env);
1471 }
1472 }
1473
1474 long do_rt_sigreturn_v1(CPUState *env)
1475 {
1476 abi_ulong frame_addr;
1477 struct rt_sigframe_v1 *frame;
1478 sigset_t host_set;
1479
1480 /*
1481 * Since we stacked the signal on a 64-bit boundary,
1482 * then 'sp' should be word aligned here. If it's
1483 * not, then the user is trying to mess with us.
1484 */
1485 if (env->regs[13] & 7)
1486 goto badframe;
1487
1488 frame_addr = env->regs[13];
1489 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1490 goto badframe;
1491
1492 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
1493 sigprocmask(SIG_SETMASK, &host_set, NULL);
1494
1495 if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
1496 goto badframe;
1497
1498 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1499 goto badframe;
1500
1501 #if 0
1502 /* Send SIGTRAP if we're single-stepping */
1503 if (ptrace_cancel_bpt(current))
1504 send_sig(SIGTRAP, current, 1);
1505 #endif
1506 unlock_user_struct(frame, frame_addr, 0);
1507 return env->regs[0];
1508
1509 badframe:
1510 unlock_user_struct(frame, frame_addr, 0);
1511 force_sig(SIGSEGV /* , current */);
1512 return 0;
1513 }
1514
1515 long do_rt_sigreturn_v2(CPUState *env)
1516 {
1517 abi_ulong frame_addr;
1518 struct rt_sigframe_v2 *frame;
1519
1520 /*
1521 * Since we stacked the signal on a 64-bit boundary,
1522 * then 'sp' should be word aligned here. If it's
1523 * not, then the user is trying to mess with us.
1524 */
1525 if (env->regs[13] & 7)
1526 goto badframe;
1527
1528 frame_addr = env->regs[13];
1529 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1530 goto badframe;
1531
1532 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1533 goto badframe;
1534
1535 unlock_user_struct(frame, frame_addr, 0);
1536 return env->regs[0];
1537
1538 badframe:
1539 unlock_user_struct(frame, frame_addr, 0);
1540 force_sig(SIGSEGV /* , current */);
1541 return 0;
1542 }
1543
1544 long do_rt_sigreturn(CPUState *env)
1545 {
1546 if (get_osversion() >= 0x020612) {
1547 return do_rt_sigreturn_v2(env);
1548 } else {
1549 return do_rt_sigreturn_v1(env);
1550 }
1551 }
1552
1553 #elif defined(TARGET_SPARC)
1554
1555 #define __SUNOS_MAXWIN 31
1556
1557 /* This is what SunOS does, so shall I. */
1558 struct target_sigcontext {
1559 abi_ulong sigc_onstack; /* state to restore */
1560
1561 abi_ulong sigc_mask; /* sigmask to restore */
1562 abi_ulong sigc_sp; /* stack pointer */
1563 abi_ulong sigc_pc; /* program counter */
1564 abi_ulong sigc_npc; /* next program counter */
1565 abi_ulong sigc_psr; /* for condition codes etc */
1566 abi_ulong sigc_g1; /* User uses these two registers */
1567 abi_ulong sigc_o0; /* within the trampoline code. */
1568
1569 /* Now comes information regarding the users window set
1570 * at the time of the signal.
1571 */
1572 abi_ulong sigc_oswins; /* outstanding windows */
1573
1574 /* stack ptrs for each regwin buf */
1575 char *sigc_spbuf[__SUNOS_MAXWIN];
1576
1577 /* Windows to restore after signal */
1578 struct {
1579 abi_ulong locals[8];
1580 abi_ulong ins[8];
1581 } sigc_wbuf[__SUNOS_MAXWIN];
1582 };
1583 /* A Sparc stack frame */
1584 struct sparc_stackf {
1585 abi_ulong locals[8];
1586 abi_ulong ins[6];
1587 struct sparc_stackf *fp;
1588 abi_ulong callers_pc;
1589 char *structptr;
1590 abi_ulong xargs[6];
1591 abi_ulong xxargs[1];
1592 };
1593
1594 typedef struct {
1595 struct {
1596 abi_ulong psr;
1597 abi_ulong pc;
1598 abi_ulong npc;
1599 abi_ulong y;
1600 abi_ulong u_regs[16]; /* globals and ins */
1601 } si_regs;
1602 int si_mask;
1603 } __siginfo_t;
1604
1605 typedef struct {
1606 unsigned long si_float_regs [32];
1607 unsigned long si_fsr;
1608 unsigned long si_fpqdepth;
1609 struct {
1610 unsigned long *insn_addr;
1611 unsigned long insn;
1612 } si_fpqueue [16];
1613 } qemu_siginfo_fpu_t;
1614
1615
1616 struct target_signal_frame {
1617 struct sparc_stackf ss;
1618 __siginfo_t info;
1619 abi_ulong fpu_save;
1620 abi_ulong insns[2] __attribute__ ((aligned (8)));
1621 abi_ulong extramask[TARGET_NSIG_WORDS - 1];
1622 abi_ulong extra_size; /* Should be 0 */
1623 qemu_siginfo_fpu_t fpu_state;
1624 };
1625 struct target_rt_signal_frame {
1626 struct sparc_stackf ss;
1627 siginfo_t info;
1628 abi_ulong regs[20];
1629 sigset_t mask;
1630 abi_ulong fpu_save;
1631 unsigned int insns[2];
1632 stack_t stack;
1633 unsigned int extra_size; /* Should be 0 */
1634 qemu_siginfo_fpu_t fpu_state;
1635 };
1636
1637 #define UREG_O0 16
1638 #define UREG_O6 22
1639 #define UREG_I0 0
1640 #define UREG_I1 1
1641 #define UREG_I2 2
1642 #define UREG_I3 3
1643 #define UREG_I4 4
1644 #define UREG_I5 5
1645 #define UREG_I6 6
1646 #define UREG_I7 7
1647 #define UREG_L0 8
1648 #define UREG_FP UREG_I6
1649 #define UREG_SP UREG_O6
1650
1651 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
1652 CPUState *env, unsigned long framesize)
1653 {
1654 abi_ulong sp;
1655
1656 sp = env->regwptr[UREG_FP];
1657
1658 /* This is the X/Open sanctioned signal stack switching. */
1659 if (sa->sa_flags & TARGET_SA_ONSTACK) {
1660 if (!on_sig_stack(sp)
1661 && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
1662 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1663 }
1664 return sp - framesize;
1665 }
1666
1667 static int
1668 setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask)
1669 {
1670 int err = 0, i;
1671
1672 err |= __put_user(env->psr, &si->si_regs.psr);
1673 err |= __put_user(env->pc, &si->si_regs.pc);
1674 err |= __put_user(env->npc, &si->si_regs.npc);
1675 err |= __put_user(env->y, &si->si_regs.y);
1676 for (i=0; i < 8; i++) {
1677 err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
1678 }
1679 for (i=0; i < 8; i++) {
1680 err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
1681 }
1682 err |= __put_user(mask, &si->si_mask);
1683 return err;
1684 }
1685
1686 #if 0
1687 static int
1688 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1689 CPUState *env, unsigned long mask)
1690 {
1691 int err = 0;
1692
1693 err |= __put_user(mask, &sc->sigc_mask);
1694 err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
1695 err |= __put_user(env->pc, &sc->sigc_pc);
1696 err |= __put_user(env->npc, &sc->sigc_npc);
1697 err |= __put_user(env->psr, &sc->sigc_psr);
1698 err |= __put_user(env->gregs[1], &sc->sigc_g1);
1699 err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
1700
1701 return err;
1702 }
1703 #endif
1704 #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
1705
1706 static void setup_frame(int sig, struct target_sigaction *ka,
1707 target_sigset_t *set, CPUState *env)
1708 {
1709 abi_ulong sf_addr;
1710 struct target_signal_frame *sf;
1711 int sigframe_size, err, i;
1712
1713 /* 1. Make sure everything is clean */
1714 //synchronize_user_stack();
1715
1716 sigframe_size = NF_ALIGNEDSZ;
1717 sf_addr = get_sigframe(ka, env, sigframe_size);
1718
1719 sf = lock_user(VERIFY_WRITE, sf_addr,
1720 sizeof(struct target_signal_frame), 0);
1721 if (!sf)
1722 goto sigsegv;
1723
1724 //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1725 #if 0
1726 if (invalid_frame_pointer(sf, sigframe_size))
1727 goto sigill_and_return;
1728 #endif
1729 /* 2. Save the current process state */
1730 err = setup___siginfo(&sf->info, env, set->sig[0]);
1731 err |= __put_user(0, &sf->extra_size);
1732
1733 //err |= save_fpu_state(regs, &sf->fpu_state);
1734 //err |= __put_user(&sf->fpu_state, &sf->fpu_save);
1735
1736 err |= __put_user(set->sig[0], &sf->info.si_mask);
1737 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
1738 err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
1739 }
1740
1741 for (i = 0; i < 8; i++) {
1742 err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
1743 }
1744 for (i = 0; i < 8; i++) {
1745 err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
1746 }
1747 if (err)
1748 goto sigsegv;
1749
1750 /* 3. signal handler back-trampoline and parameters */
1751 env->regwptr[UREG_FP] = sf_addr;
1752 env->regwptr[UREG_I0] = sig;
1753 env->regwptr[UREG_I1] = sf_addr +
1754 offsetof(struct target_signal_frame, info);
1755 env->regwptr[UREG_I2] = sf_addr +
1756 offsetof(struct target_signal_frame, info);
1757
1758 /* 4. signal handler */
1759 env->pc = ka->_sa_handler;
1760 env->npc = (env->pc + 4);
1761 /* 5. return to kernel instructions */
1762 if (ka->sa_restorer)
1763 env->regwptr[UREG_I7] = ka->sa_restorer;
1764 else {
1765 uint32_t val32;
1766
1767 env->regwptr[UREG_I7] = sf_addr +
1768 offsetof(struct target_signal_frame, insns) - 2 * 4;
1769
1770 /* mov __NR_sigreturn, %g1 */
1771 val32 = 0x821020d8;
1772 err |= __put_user(val32, &sf->insns[0]);
1773
1774 /* t 0x10 */
1775 val32 = 0x91d02010;
1776 err |= __put_user(val32, &sf->insns[1]);
1777 if (err)
1778 goto sigsegv;
1779
1780 /* Flush instruction space. */
1781 //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
1782 // tb_flush(env);
1783 }
1784 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
1785 return;
1786 #if 0
1787 sigill_and_return:
1788 force_sig(TARGET_SIGILL);
1789 #endif
1790 sigsegv:
1791 //fprintf(stderr, "force_sig\n");
1792 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
1793 force_sig(TARGET_SIGSEGV);
1794 }
1795 static inline int
1796 restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu)
1797 {
1798 int err;
1799 #if 0
1800 #ifdef CONFIG_SMP
1801 if (current->flags & PF_USEDFPU)
1802 regs->psr &= ~PSR_EF;
1803 #else
1804 if (current == last_task_used_math) {
1805 last_task_used_math = 0;
1806 regs->psr &= ~PSR_EF;
1807 }
1808 #endif
1809 current->used_math = 1;
1810 current->flags &= ~PF_USEDFPU;
1811 #endif
1812 #if 0
1813 if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
1814 return -EFAULT;
1815 #endif
1816
1817 #if 0
1818 /* XXX: incorrect */
1819 err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
1820 (sizeof(unsigned long) * 32));
1821 #endif
1822 err |= __get_user(env->fsr, &fpu->si_fsr);
1823 #if 0
1824 err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
1825 if (current->thread.fpqdepth != 0)
1826 err |= __copy_from_user(&current->thread.fpqueue[0],
1827 &fpu->si_fpqueue[0],
1828 ((sizeof(unsigned long) +
1829 (sizeof(unsigned long *)))*16));
1830 #endif
1831 return err;
1832 }
1833
1834
1835 static void setup_rt_frame(int sig, struct target_sigaction *ka,
1836 target_siginfo_t *info,
1837 target_sigset_t *set, CPUState *env)
1838 {
1839 fprintf(stderr, "setup_rt_frame: not implemented\n");
1840 }
1841
1842 long do_sigreturn(CPUState *env)
1843 {
1844 abi_ulong sf_addr;
1845 struct target_signal_frame *sf;
1846 uint32_t up_psr, pc, npc;
1847 target_sigset_t set;
1848 sigset_t host_set;
1849 abi_ulong fpu_save_addr;
1850 int err, i;
1851
1852 sf_addr = env->regwptr[UREG_FP];
1853 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1))
1854 goto segv_and_exit;
1855 #if 0
1856 fprintf(stderr, "sigreturn\n");
1857 fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1858 #endif
1859 //cpu_dump_state(env, stderr, fprintf, 0);
1860
1861 /* 1. Make sure we are not getting garbage from the user */
1862
1863 if (sf_addr & 3)
1864 goto segv_and_exit;
1865
1866 err = __get_user(pc, &sf->info.si_regs.pc);
1867 err |= __get_user(npc, &sf->info.si_regs.npc);
1868
1869 if ((pc | npc) & 3)
1870 goto segv_and_exit;
1871
1872 /* 2. Restore the state */
1873 err |= __get_user(up_psr, &sf->info.si_regs.psr);
1874
1875 /* User can only change condition codes and FPU enabling in %psr. */
1876 env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
1877 | (env->psr & ~(PSR_ICC /* | PSR_EF */));
1878
1879 env->pc = pc;
1880 env->npc = npc;
1881 err |= __get_user(env->y, &sf->info.si_regs.y);
1882 for (i=0; i < 8; i++) {
1883 err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
1884 }
1885 for (i=0; i < 8; i++) {
1886 err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
1887 }
1888
1889 err |= __get_user(fpu_save_addr, &sf->fpu_save);
1890
1891 //if (fpu_save)
1892 // err |= restore_fpu_state(env, fpu_save);
1893
1894 /* This is pretty much atomic, no amount locking would prevent
1895 * the races which exist anyways.
1896 */
1897 err |= __get_user(set.sig[0], &sf->info.si_mask);
1898 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1899 err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
1900 }
1901
1902 target_to_host_sigset_internal(&host_set, &set);
1903 sigprocmask(SIG_SETMASK, &host_set, NULL);
1904
1905 if (err)
1906 goto segv_and_exit;
1907 unlock_user_struct(sf, sf_addr, 0);
1908 return env->regwptr[0];
1909
1910 segv_and_exit:
1911 unlock_user_struct(sf, sf_addr, 0);
1912 force_sig(TARGET_SIGSEGV);
1913 }
1914
1915 long do_rt_sigreturn(CPUState *env)
1916 {
1917 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
1918 return -TARGET_ENOSYS;
1919 }
1920
1921 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
1922 #define MC_TSTATE 0
1923 #define MC_PC 1
1924 #define MC_NPC 2
1925 #define MC_Y 3
1926 #define MC_G1 4
1927 #define MC_G2 5
1928 #define MC_G3 6
1929 #define MC_G4 7
1930 #define MC_G5 8
1931 #define MC_G6 9
1932 #define MC_G7 10
1933 #define MC_O0 11
1934 #define MC_O1 12
1935 #define MC_O2 13
1936 #define MC_O3 14
1937 #define MC_O4 15
1938 #define MC_O5 16
1939 #define MC_O6 17
1940 #define MC_O7 18
1941 #define MC_NGREG 19
1942
1943 typedef abi_ulong target_mc_greg_t;
1944 typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
1945
1946 struct target_mc_fq {
1947 abi_ulong *mcfq_addr;
1948 uint32_t mcfq_insn;
1949 };
1950
1951 struct target_mc_fpu {
1952 union {
1953 uint32_t sregs[32];
1954 uint64_t dregs[32];
1955 //uint128_t qregs[16];
1956 } mcfpu_fregs;
1957 abi_ulong mcfpu_fsr;
1958 abi_ulong mcfpu_fprs;
1959 abi_ulong mcfpu_gsr;
1960 struct target_mc_fq *mcfpu_fq;
1961 unsigned char mcfpu_qcnt;
1962 unsigned char mcfpu_qentsz;
1963 unsigned char mcfpu_enab;
1964 };
1965 typedef struct target_mc_fpu target_mc_fpu_t;
1966
1967 typedef struct {
1968 target_mc_gregset_t mc_gregs;
1969 target_mc_greg_t mc_fp;
1970 target_mc_greg_t mc_i7;
1971 target_mc_fpu_t mc_fpregs;
1972 } target_mcontext_t;
1973
1974 struct target_ucontext {
1975 struct target_ucontext *uc_link;
1976 abi_ulong uc_flags;
1977 target_sigset_t uc_sigmask;
1978 target_mcontext_t uc_mcontext;
1979 };
1980
1981 /* A V9 register window */
1982 struct target_reg_window {
1983 abi_ulong locals[8];
1984 abi_ulong ins[8];
1985 };
1986
1987 #define TARGET_STACK_BIAS 2047
1988
1989 /* {set, get}context() needed for 64-bit SparcLinux userland. */
1990 void sparc64_set_context(CPUSPARCState *env)
1991 {
1992 abi_ulong ucp_addr;
1993 struct target_ucontext *ucp;
1994 target_mc_gregset_t *grp;
1995 abi_ulong pc, npc, tstate;
1996 abi_ulong fp, i7, w_addr;
1997 unsigned char fenab;
1998 int err;
1999 unsigned int i;
2000
2001 ucp_addr = env->regwptr[UREG_I0];
2002 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1))
2003 goto do_sigsegv;
2004 grp = &ucp->uc_mcontext.mc_gregs;
2005 err = __get_user(pc, &((*grp)[MC_PC]));
2006 err |= __get_user(npc, &((*grp)[MC_NPC]));
2007 if (err || ((pc | npc) & 3))
2008 goto do_sigsegv;
2009 if (env->regwptr[UREG_I1]) {
2010 target_sigset_t target_set;
2011 sigset_t set;
2012
2013 if (TARGET_NSIG_WORDS == 1) {
2014 if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0]))
2015 goto do_sigsegv;
2016 } else {
2017 abi_ulong *src, *dst;
2018 src = ucp->uc_sigmask.sig;
2019 dst = target_set.sig;
2020 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2021 i++, dst++, src++)
2022 err |= __get_user(*dst, src);
2023 if (err)
2024 goto do_sigsegv;
2025 }
2026 target_to_host_sigset_internal(&set, &target_set);
2027 sigprocmask(SIG_SETMASK, &set, NULL);
2028 }
2029 env->pc = pc;
2030 env->npc = npc;
2031 err |= __get_user(env->y, &((*grp)[MC_Y]));
2032 err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
2033 env->asi = (tstate >> 24) & 0xff;
2034 PUT_CCR(env, tstate >> 32);
2035 PUT_CWP64(env, tstate & 0x1f);
2036 err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
2037 err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
2038 err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
2039 err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
2040 err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
2041 err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
2042 err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
2043 err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
2044 err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
2045 err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
2046 err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
2047 err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
2048 err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
2049 err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
2050 err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
2051
2052 err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp));
2053 err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7));
2054
2055 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2056 if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2057 abi_ulong) != 0)
2058 goto do_sigsegv;
2059 if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2060 abi_ulong) != 0)
2061 goto do_sigsegv;
2062 err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
2063 err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
2064 {
2065 uint32_t *src, *dst;
2066 src = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2067 dst = env->fpr;
2068 /* XXX: check that the CPU storage is the same as user context */
2069 for (i = 0; i < 64; i++, dst++, src++)
2070 err |= __get_user(*dst, src);
2071 }
2072 err |= __get_user(env->fsr,
2073 &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
2074 err |= __get_user(env->gsr,
2075 &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
2076 if (err)
2077 goto do_sigsegv;
2078 unlock_user_struct(ucp, ucp_addr, 0);
2079 return;
2080 do_sigsegv:
2081 unlock_user_struct(ucp, ucp_addr, 0);
2082 force_sig(SIGSEGV);
2083 }
2084
2085 void sparc64_get_context(CPUSPARCState *env)
2086 {
2087 abi_ulong ucp_addr;
2088 struct target_ucontext *ucp;
2089 target_mc_gregset_t *grp;
2090 target_mcontext_t *mcp;
2091 abi_ulong fp, i7, w_addr;
2092 int err;
2093 unsigned int i;
2094 target_sigset_t target_set;
2095 sigset_t set;
2096
2097 ucp_addr = env->regwptr[UREG_I0];
2098 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0))
2099 goto do_sigsegv;
2100
2101 mcp = &ucp->uc_mcontext;
2102 grp = &mcp->mc_gregs;
2103
2104 /* Skip over the trap instruction, first. */
2105 env->pc = env->npc;
2106 env->npc += 4;
2107
2108 err = 0;
2109
2110 sigprocmask(0, NULL, &set);
2111 host_to_target_sigset_internal(&target_set, &set);
2112 if (TARGET_NSIG_WORDS == 1) {
2113 err |= __put_user(target_set.sig[0],
2114 (abi_ulong *)&ucp->uc_sigmask);
2115 } else {
2116 abi_ulong *src, *dst;
2117 src = target_set.sig;
2118 dst = ucp->uc_sigmask.sig;
2119 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2120 i++, dst++, src++)
2121 err |= __put_user(*src, dst);
2122 if (err)
2123 goto do_sigsegv;
2124 }
2125
2126 /* XXX: tstate must be saved properly */
2127 // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
2128 err |= __put_user(env->pc, &((*grp)[MC_PC]));
2129 err |= __put_user(env->npc, &((*grp)[MC_NPC]));
2130 err |= __put_user(env->y, &((*grp)[MC_Y]));
2131 err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
2132 err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
2133 err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
2134 err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
2135 err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
2136 err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
2137 err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
2138 err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
2139 err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
2140 err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
2141 err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
2142 err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
2143 err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
2144 err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
2145 err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
2146
2147 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2148 fp = i7 = 0;
2149 if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2150 abi_ulong) != 0)
2151 goto do_sigsegv;
2152 if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2153 abi_ulong) != 0)
2154 goto do_sigsegv;
2155 err |= __put_user(fp, &(mcp->mc_fp));
2156 err |= __put_user(i7, &(mcp->mc_i7));
2157
2158 {
2159 uint32_t *src, *dst;
2160 src = env->fpr;
2161 dst = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2162 /* XXX: check that the CPU storage is the same as user context */
2163 for (i = 0; i < 64; i++, dst++, src++)
2164 err |= __put_user(*src, dst);
2165 }
2166 err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
2167 err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
2168 err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
2169
2170 if (err)
2171 goto do_sigsegv;
2172 unlock_user_struct(ucp, ucp_addr, 1);
2173 return;
2174 do_sigsegv:
2175 unlock_user_struct(ucp, ucp_addr, 1);
2176 force_sig(SIGSEGV);
2177 }
2178 #endif
2179 #elif defined(TARGET_ABI_MIPSN64)
2180
2181 # warning signal handling not implemented
2182
2183 static void setup_frame(int sig, struct target_sigaction *ka,
2184 target_sigset_t *set, CPUState *env)
2185 {
2186 fprintf(stderr, "setup_frame: not implemented\n");
2187 }
2188
2189 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2190 target_siginfo_t *info,
2191 target_sigset_t *set, CPUState *env)
2192 {
2193 fprintf(stderr, "setup_rt_frame: not implemented\n");
2194 }
2195
2196 long do_sigreturn(CPUState *env)
2197 {
2198 fprintf(stderr, "do_sigreturn: not implemented\n");
2199 return -TARGET_ENOSYS;
2200 }
2201
2202 long do_rt_sigreturn(CPUState *env)
2203 {
2204 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2205 return -TARGET_ENOSYS;
2206 }
2207
2208 #elif defined(TARGET_ABI_MIPSN32)
2209
2210 # warning signal handling not implemented
2211
2212 static void setup_frame(int sig, struct target_sigaction *ka,
2213 target_sigset_t *set, CPUState *env)
2214 {
2215 fprintf(stderr, "setup_frame: not implemented\n");
2216 }
2217
2218 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2219 target_siginfo_t *info,
2220 target_sigset_t *set, CPUState *env)
2221 {
2222 fprintf(stderr, "setup_rt_frame: not implemented\n");
2223 }
2224
2225 long do_sigreturn(CPUState *env)
2226 {
2227 fprintf(stderr, "do_sigreturn: not implemented\n");
2228 return -TARGET_ENOSYS;
2229 }
2230
2231 long do_rt_sigreturn(CPUState *env)
2232 {
2233 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2234 return -TARGET_ENOSYS;
2235 }
2236
2237 #elif defined(TARGET_ABI_MIPSO32)
2238
2239 struct target_sigcontext {
2240 uint32_t sc_regmask; /* Unused */
2241 uint32_t sc_status;
2242 uint64_t sc_pc;
2243 uint64_t sc_regs[32];
2244 uint64_t sc_fpregs[32];
2245 uint32_t sc_ownedfp; /* Unused */
2246 uint32_t sc_fpc_csr;
2247 uint32_t sc_fpc_eir; /* Unused */
2248 uint32_t sc_used_math;
2249 uint32_t sc_dsp; /* dsp status, was sc_ssflags */
2250 uint64_t sc_mdhi;
2251 uint64_t sc_mdlo;
2252 target_ulong sc_hi1; /* Was sc_cause */
2253 target_ulong sc_lo1; /* Was sc_badvaddr */
2254 target_ulong sc_hi2; /* Was sc_sigset[4] */
2255 target_ulong sc_lo2;
2256 target_ulong sc_hi3;
2257 target_ulong sc_lo3;
2258 };
2259
2260 struct sigframe {
2261 uint32_t sf_ass[4]; /* argument save space for o32 */
2262 uint32_t sf_code[2]; /* signal trampoline */
2263 struct target_sigcontext sf_sc;
2264 target_sigset_t sf_mask;
2265 };
2266
2267 /* Install trampoline to jump back from signal handler */
2268 static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
2269 {
2270 int err;
2271
2272 /*
2273 * Set up the return code ...
2274 *
2275 * li v0, __NR__foo_sigreturn
2276 * syscall
2277 */
2278
2279 err = __put_user(0x24020000 + syscall, tramp + 0);
2280 err |= __put_user(0x0000000c , tramp + 1);
2281 /* flush_cache_sigtramp((unsigned long) tramp); */
2282 return err;
2283 }
2284
2285 static inline int
2286 setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2287 {
2288 int err = 0;
2289
2290 err |= __put_user(regs->active_tc.PC, &sc->sc_pc);
2291
2292 #define save_gp_reg(i) do { \
2293 err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
2294 } while(0)
2295 __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2);
2296 save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6);
2297 save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10);
2298 save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
2299 save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18);
2300 save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22);
2301 save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
2302 save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30);
2303 save_gp_reg(31);
2304 #undef save_gp_reg
2305
2306 err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2307 err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2308
2309 /* Not used yet, but might be useful if we ever have DSP suppport */
2310 #if 0
2311 if (cpu_has_dsp) {
2312 err |= __put_user(mfhi1(), &sc->sc_hi1);
2313 err |= __put_user(mflo1(), &sc->sc_lo1);
2314 err |= __put_user(mfhi2(), &sc->sc_hi2);
2315 err |= __put_user(mflo2(), &sc->sc_lo2);
2316 err |= __put_user(mfhi3(), &sc->sc_hi3);
2317 err |= __put_user(mflo3(), &sc->sc_lo3);
2318 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2319 }
2320 /* same with 64 bit */
2321 #ifdef CONFIG_64BIT
2322 err |= __put_user(regs->hi, &sc->sc_hi[0]);
2323 err |= __put_user(regs->lo, &sc->sc_lo[0]);
2324 if (cpu_has_dsp) {
2325 err |= __put_user(mfhi1(), &sc->sc_hi[1]);
2326 err |= __put_user(mflo1(), &sc->sc_lo[1]);
2327 err |= __put_user(mfhi2(), &sc->sc_hi[2]);
2328 err |= __put_user(mflo2(), &sc->sc_lo[2]);
2329 err |= __put_user(mfhi3(), &sc->sc_hi[3]);
2330 err |= __put_user(mflo3(), &sc->sc_lo[3]);
2331 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2332 }
2333 #endif
2334 #endif
2335
2336 #if 0
2337 err |= __put_user(!!used_math(), &sc->sc_used_math);
2338
2339 if (!used_math())
2340 goto out;
2341
2342 /*
2343 * Save FPU state to signal context. Signal handler will "inherit"
2344 * current FPU state.
2345 */
2346 preempt_disable();
2347
2348 if (!is_fpu_owner()) {
2349 own_fpu();
2350 restore_fp(current);
2351 }
2352 err |= save_fp_context(sc);
2353
2354 preempt_enable();
2355 out:
2356 #endif
2357 return err;
2358 }
2359
2360 static inline int
2361 restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2362 {
2363 int err = 0;
2364
2365 err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
2366
2367 err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2368 err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2369
2370 #define restore_gp_reg(i) do { \
2371 err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
2372 } while(0)
2373 restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3);
2374 restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6);
2375 restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9);
2376 restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12);
2377 restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15);
2378 restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18);
2379 restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21);
2380 restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24);
2381 restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27);
2382 restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30);
2383 restore_gp_reg(31);
2384 #undef restore_gp_reg
2385
2386 #if 0
2387 if (cpu_has_dsp) {
2388 err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
2389 err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
2390 err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
2391 err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
2392 err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
2393 err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
2394 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2395 }
2396 #ifdef CONFIG_64BIT
2397 err |= __get_user(regs->hi, &sc->sc_hi[0]);
2398 err |= __get_user(regs->lo, &sc->sc_lo[0]);
2399 if (cpu_has_dsp) {
2400 err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
2401 err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
2402 err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
2403 err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
2404 err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
2405 err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
2406 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2407 }
2408 #endif
2409
2410 err |= __get_user(used_math, &sc->sc_used_math);
2411 conditional_used_math(used_math);
2412
2413 preempt_disable();
2414
2415 if (used_math()) {
2416 /* restore fpu context if we have used it before */
2417 own_fpu();
2418 err |= restore_fp_context(sc);
2419 } else {
2420 /* signal handler may have used FPU. Give it up. */
2421 lose_fpu();
2422 }
2423
2424 preempt_enable();
2425 #endif
2426 return err;
2427 }
2428 /*
2429 * Determine which stack to use..
2430 */
2431 static inline abi_ulong
2432 get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
2433 {
2434 unsigned long sp;
2435
2436 /* Default to using normal stack */
2437 sp = regs->active_tc.gpr[29];
2438
2439 /*
2440 * FPU emulator may have it's own trampoline active just
2441 * above the user stack, 16-bytes before the next lowest
2442 * 16 byte boundary. Try to avoid trashing it.
2443 */
2444 sp -= 32;
2445
2446 /* This is the X/Open sanctioned signal stack switching. */
2447 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
2448 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2449 }
2450
2451 return (sp - frame_size) & ~7;
2452 }
2453
2454 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */
2455 static void setup_frame(int sig, struct target_sigaction * ka,
2456 target_sigset_t *set, CPUState *regs)
2457 {
2458 struct sigframe *frame;
2459 abi_ulong frame_addr;
2460 int i;
2461
2462 frame_addr = get_sigframe(ka, regs, sizeof(*frame));
2463 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2464 goto give_sigsegv;
2465
2466 install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
2467
2468 if(setup_sigcontext(regs, &frame->sf_sc))
2469 goto give_sigsegv;
2470
2471 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2472 if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
2473 goto give_sigsegv;
2474 }
2475
2476 /*
2477 * Arguments to signal handler:
2478 *
2479 * a0 = signal number
2480 * a1 = 0 (should be cause)
2481 * a2 = pointer to struct sigcontext
2482 *
2483 * $25 and PC point to the signal handler, $29 points to the
2484 * struct sigframe.
2485 */
2486 regs->active_tc.gpr[ 4] = sig;
2487 regs->active_tc.gpr[ 5] = 0;
2488 regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
2489 regs->active_tc.gpr[29] = frame_addr;
2490 regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
2491 /* The original kernel code sets CP0_EPC to the handler
2492 * since it returns to userland using eret
2493 * we cannot do this here, and we must set PC directly */
2494 regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
2495 unlock_user_struct(frame, frame_addr, 1);
2496 return;
2497
2498 give_sigsegv:
2499 unlock_user_struct(frame, frame_addr, 1);
2500 force_sig(TARGET_SIGSEGV/*, current*/);
2501 return;
2502 }
2503
2504 long do_sigreturn(CPUState *regs)
2505 {
2506 struct sigframe *frame;
2507 abi_ulong frame_addr;
2508 sigset_t blocked;
2509 target_sigset_t target_set;
2510 int i;
2511
2512 #if defined(DEBUG_SIGNAL)
2513 fprintf(stderr, "do_sigreturn\n");
2514 #endif
2515 frame_addr = regs->active_tc.gpr[29];
2516 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2517 goto badframe;
2518
2519 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2520 if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
2521 goto badframe;
2522 }
2523
2524 target_to_host_sigset_internal(&blocked, &target_set);
2525 sigprocmask(SIG_SETMASK, &blocked, NULL);
2526
2527 if (restore_sigcontext(regs, &frame->sf_sc))
2528 goto badframe;
2529
2530 #if 0
2531 /*
2532 * Don't let your children do this ...
2533 */
2534 __asm__ __volatile__(
2535 "move\t$29, %0\n\t"
2536 "j\tsyscall_exit"
2537 :/* no outputs */
2538 :"r" (&regs));
2539 /* Unreached */
2540 #endif
2541
2542 regs->active_tc.PC = regs->CP0_EPC;
2543 /* I am not sure this is right, but it seems to work
2544 * maybe a problem with nested signals ? */
2545 regs->CP0_EPC = 0;
2546 return 0;
2547
2548 badframe:
2549 force_sig(TARGET_SIGSEGV/*, current*/);
2550 return 0;
2551 }
2552
2553 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2554 target_siginfo_t *info,
2555 target_sigset_t *set, CPUState *env)
2556 {
2557 fprintf(stderr, "setup_rt_frame: not implemented\n");
2558 }
2559
2560 long do_rt_sigreturn(CPUState *env)
2561 {
2562 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2563 return -TARGET_ENOSYS;
2564 }
2565
2566 #elif defined(TARGET_SH4)
2567
2568 /*
2569 * code and data structures from linux kernel:
2570 * include/asm-sh/sigcontext.h
2571 * arch/sh/kernel/signal.c
2572 */
2573
2574 struct target_sigcontext {
2575 target_ulong oldmask;
2576
2577 /* CPU registers */
2578 target_ulong sc_gregs[16];
2579 target_ulong sc_pc;
2580 target_ulong sc_pr;
2581 target_ulong sc_sr;
2582 target_ulong sc_gbr;
2583 target_ulong sc_mach;
2584 target_ulong sc_macl;
2585
2586 /* FPU registers */
2587 target_ulong sc_fpregs[16];
2588 target_ulong sc_xfpregs[16];
2589 unsigned int sc_fpscr;
2590 unsigned int sc_fpul;
2591 unsigned int sc_ownedfp;
2592 };
2593
2594 struct target_sigframe
2595 {
2596 struct target_sigcontext sc;
2597 target_ulong extramask[TARGET_NSIG_WORDS-1];
2598 uint16_t retcode[3];
2599 };
2600
2601
2602 struct target_ucontext {
2603 target_ulong uc_flags;
2604 struct target_ucontext *uc_link;
2605 target_stack_t uc_stack;
2606 struct target_sigcontext uc_mcontext;
2607 target_sigset_t uc_sigmask; /* mask last for extensibility */
2608 };
2609
2610 struct target_rt_sigframe
2611 {
2612 struct target_siginfo info;
2613 struct target_ucontext uc;
2614 uint16_t retcode[3];
2615 };
2616
2617
2618 #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
2619 #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
2620
2621 static abi_ulong get_sigframe(struct target_sigaction *ka,
2622 unsigned long sp, size_t frame_size)
2623 {
2624 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
2625 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2626 }
2627
2628 return (sp - frame_size) & -8ul;
2629 }
2630
2631 static int setup_sigcontext(struct target_sigcontext *sc,
2632 CPUState *regs, unsigned long mask)
2633 {
2634 int err = 0;
2635
2636 #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
2637 COPY(gregs[0]); COPY(gregs[1]);
2638 COPY(gregs[2]); COPY(gregs[3]);
2639 COPY(gregs[4]); COPY(gregs[5]);
2640 COPY(gregs[6]); COPY(gregs[7]);
2641 COPY(gregs[8]); COPY(gregs[9]);
2642 COPY(gregs[10]); COPY(gregs[11]);
2643 COPY(gregs[12]); COPY(gregs[13]);
2644 COPY(gregs[14]); COPY(gregs[15]);
2645 COPY(gbr); COPY(mach);
2646 COPY(macl); COPY(pr);
2647 COPY(sr); COPY(pc);
2648 #undef COPY
2649
2650 /* todo: save FPU registers here */
2651
2652 /* non-iBCS2 extensions.. */
2653 err |= __put_user(mask, &sc->oldmask);
2654
2655 return err;
2656 }
2657
2658 static int restore_sigcontext(struct CPUState *regs,
2659 struct target_sigcontext *sc)
2660 {
2661 unsigned int err = 0;
2662
2663 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
2664 COPY(gregs[1]);
2665 COPY(gregs[2]); COPY(gregs[3]);
2666 COPY(gregs[4]); COPY(gregs[5]);
2667 COPY(gregs[6]); COPY(gregs[7]);
2668 COPY(gregs[8]); COPY(gregs[9]);
2669 COPY(gregs[10]); COPY(gregs[11]);
2670 COPY(gregs[12]); COPY(gregs[13]);
2671 COPY(gregs[14]); COPY(gregs[15]);
2672 COPY(gbr); COPY(mach);
2673 COPY(macl); COPY(pr);
2674 COPY(sr); COPY(pc);
2675 #undef COPY
2676
2677 /* todo: restore FPU registers here */
2678
2679 regs->tra = -1; /* disable syscall checks */
2680 return err;
2681 }
2682
2683 static void setup_frame(int sig, struct target_sigaction *ka,
2684 target_sigset_t *set, CPUState *regs)
2685 {
2686 struct target_sigframe *frame;
2687 abi_ulong frame_addr;
2688 int i;
2689 int err = 0;
2690 int signal;
2691
2692 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
2693 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2694 goto give_sigsegv;
2695
2696 signal = current_exec_domain_sig(sig);
2697
2698 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
2699
2700 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
2701 err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
2702 }
2703
2704 /* Set up to return from userspace. If provided, use a stub
2705 already in userspace. */
2706 if (ka->sa_flags & TARGET_SA_RESTORER) {
2707 regs->pr = (unsigned long) ka->sa_restorer;
2708 } else {
2709 /* Generate return code (system call to sigreturn) */
2710 err |= __put_user(MOVW(2), &frame->retcode[0]);
2711 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
2712 err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
2713 regs->pr = (unsigned long) frame->retcode;
2714 }
2715
2716 if (err)
2717 goto give_sigsegv;
2718
2719 /* Set up registers for signal handler */
2720 regs->gregs[15] = (unsigned long) frame;
2721 regs->gregs[4] = signal; /* Arg for signal handler */
2722 regs->gregs[5] = 0;
2723 regs->gregs[6] = (unsigned long) &frame->sc;
2724 regs->pc = (unsigned long) ka->_sa_handler;
2725
2726 unlock_user_struct(frame, frame_addr, 1);
2727 return;
2728
2729 give_sigsegv:
2730 unlock_user_struct(frame, frame_addr, 1);
2731 force_sig(SIGSEGV);
2732 }
2733
2734 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2735 target_siginfo_t *info,
2736 target_sigset_t *set, CPUState *regs)
2737 {
2738 struct target_rt_sigframe *frame;
2739 abi_ulong frame_addr;
2740 int i;
2741 int err = 0;
2742 int signal;
2743
2744 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
2745 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2746 goto give_sigsegv;
2747
2748 signal = current_exec_domain_sig(sig);
2749
2750 err |= copy_siginfo_to_user(&frame->info, info);
2751
2752 /* Create the ucontext. */
2753 err |= __put_user(0, &frame->uc.uc_flags);
2754 err |= __put_user(0, (unsigned long *)&frame->uc.uc_link);
2755 err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp,
2756 &frame->uc.uc_stack.ss_sp);
2757 err |= __put_user(sas_ss_flags(regs->gregs[15]),
2758 &frame->uc.uc_stack.ss_flags);
2759 err |= __put_user(target_sigaltstack_used.ss_size,
2760 &frame->uc.uc_stack.ss_size);
2761 err |= setup_sigcontext(&frame->uc.uc_mcontext,
2762 regs, set->sig[0]);
2763 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2764 err |= __put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]);
2765 }
2766
2767 /* Set up to return from userspace. If provided, use a stub
2768 already in userspace. */
2769 if (ka->sa_flags & TARGET_SA_RESTORER) {
2770 regs->pr = (unsigned long) ka->sa_restorer;
2771 } else {
2772 /* Generate return code (system call to sigreturn) */
2773 err |= __put_user(MOVW(2), &frame->retcode[0]);
2774 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
2775 err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
2776 regs->pr = (unsigned long) frame->retcode;
2777 }
2778
2779 if (err)
2780 goto give_sigsegv;
2781
2782 /* Set up registers for signal handler */
2783 regs->gregs[15] = (unsigned long) frame;
2784 regs->gregs[4] = signal; /* Arg for signal handler */
2785 regs->gregs[5] = (unsigned long) &frame->info;
2786 regs->gregs[6] = (unsigned long) &frame->uc;
2787 regs->pc = (unsigned long) ka->_sa_handler;
2788
2789 unlock_user_struct(frame, frame_addr, 1);
2790 return;
2791
2792 give_sigsegv:
2793 unlock_user_struct(frame, frame_addr, 1);
2794 force_sig(SIGSEGV);
2795 }
2796
2797 long do_sigreturn(CPUState *regs)
2798 {
2799 struct target_sigframe *frame;
2800 abi_ulong frame_addr;
2801 sigset_t blocked;
2802 target_sigset_t target_set;
2803 int i;
2804 int err = 0;
2805
2806 #if defined(DEBUG_SIGNAL)
2807 fprintf(stderr, "do_sigreturn\n");
2808 #endif
2809 frame_addr = regs->gregs[15];
2810 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2811 goto badframe;
2812
2813 err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
2814 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2815 err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
2816 }
2817
2818 if (err)
2819 goto badframe;
2820
2821 target_to_host_sigset_internal(&blocked, &target_set);
2822 sigprocmask(SIG_SETMASK, &blocked, NULL);
2823
2824 if (restore_sigcontext(regs, &frame->sc))
2825 goto badframe;
2826
2827 unlock_user_struct(frame, frame_addr, 0);
2828 return regs->gregs[0];
2829
2830 badframe:
2831 unlock_user_struct(frame, frame_addr, 0);
2832 force_sig(TARGET_SIGSEGV);
2833 return 0;
2834 }
2835
2836 long do_rt_sigreturn(CPUState *regs)
2837 {
2838 struct target_rt_sigframe *frame;
2839 abi_ulong frame_addr;
2840 sigset_t blocked;
2841
2842 #if defined(DEBUG_SIGNAL)
2843 fprintf(stderr, "do_rt_sigreturn\n");
2844 #endif
2845 frame_addr = regs->gregs[15];
2846 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2847 goto badframe;
2848
2849 target_to_host_sigset(&blocked, &frame->uc.uc_sigmask);
2850 sigprocmask(SIG_SETMASK, &blocked, NULL);
2851
2852 if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
2853 goto badframe;
2854
2855 if (do_sigaltstack(frame_addr +
2856 offsetof(struct target_rt_sigframe, uc.uc_stack),
2857 0, get_sp_from_cpustate(regs)) == -EFAULT)
2858 goto badframe;
2859
2860 unlock_user_struct(frame, frame_addr, 0);
2861 return regs->gregs[0];
2862
2863 badframe:
2864 unlock_user_struct(frame, frame_addr, 0);
2865 force_sig(TARGET_SIGSEGV);
2866 return 0;
2867 }
2868 #elif defined(TARGET_CRIS)
2869
2870 struct target_sigcontext {
2871 struct target_pt_regs regs; /* needs to be first */
2872 uint32_t oldmask;
2873 uint32_t usp; /* usp before stacking this gunk on it */
2874 };
2875
2876 /* Signal frames. */
2877 struct target_signal_frame {
2878 struct target_sigcontext sc;
2879 uint32_t extramask[TARGET_NSIG_WORDS - 1];
2880 uint8_t retcode[8]; /* Trampoline code. */
2881 };
2882
2883 struct rt_signal_frame {
2884 struct siginfo *pinfo;
2885 void *puc;
2886 struct siginfo info;
2887 struct ucontext uc;
2888 uint8_t retcode[8]; /* Trampoline code. */
2889 };
2890
2891 static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env)
2892 {
2893 __put_user(env->regs[0], &sc->regs.r0);
2894 __put_user(env->regs[1], &sc->regs.r1);
2895 __put_user(env->regs[2], &sc->regs.r2);
2896 __put_user(env->regs[3], &sc->regs.r3);
2897 __put_user(env->regs[4], &sc->regs.r4);
2898 __put_user(env->regs[5], &sc->regs.r5);
2899 __put_user(env->regs[6], &sc->regs.r6);
2900 __put_user(env->regs[7], &sc->regs.r7);
2901 __put_user(env->regs[8], &sc->regs.r8);
2902 __put_user(env->regs[9], &sc->regs.r9);
2903 __put_user(env->regs[10], &sc->regs.r10);
2904 __put_user(env->regs[11], &sc->regs.r11);
2905 __put_user(env->regs[12], &sc->regs.r12);
2906 __put_user(env->regs[13], &sc->regs.r13);
2907 __put_user(env->regs[14], &sc->usp);
2908 __put_user(env->regs[15], &sc->regs.acr);
2909 __put_user(env->pregs[PR_MOF], &sc->regs.mof);
2910 __put_user(env->pregs[PR_SRP], &sc->regs.srp);
2911 __put_user(env->pc, &sc->regs.erp);
2912 }
2913
2914 static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env)
2915 {
2916 __get_user(env->regs[0], &sc->regs.r0);
2917 __get_user(env->regs[1], &sc->regs.r1);
2918 __get_user(env->regs[2], &sc->regs.r2);
2919 __get_user(env->regs[3], &sc->regs.r3);
2920 __get_user(env->regs[4], &sc->regs.r4);
2921 __get_user(env->regs[5], &sc->regs.r5);
2922 __get_user(env->regs[6], &sc->regs.r6);
2923 __get_user(env->regs[7], &sc->regs.r7);
2924 __get_user(env->regs[8], &sc->regs.r8);
2925 __get_user(env->regs[9], &sc->regs.r9);
2926 __get_user(env->regs[10], &sc->regs.r10);
2927 __get_user(env->regs[11], &sc->regs.r11);
2928 __get_user(env->regs[12], &sc->regs.r12);
2929 __get_user(env->regs[13], &sc->regs.r13);
2930 __get_user(env->regs[14], &sc->usp);
2931 __get_user(env->regs[15], &sc->regs.acr);
2932 __get_user(env->pregs[PR_MOF], &sc->regs.mof);
2933 __get_user(env->pregs[PR_SRP], &sc->regs.srp);
2934 __get_user(env->pc, &sc->regs.erp);
2935 }
2936
2937 static abi_ulong get_sigframe(CPUState *env, int framesize)
2938 {
2939 abi_ulong sp;
2940 /* Align the stack downwards to 4. */
2941 sp = (env->regs[R_SP] & ~3);
2942 return sp - framesize;
2943 }
2944
2945 static void setup_frame(int sig, struct target_sigaction *ka,
2946 target_sigset_t *set, CPUState *env)
2947 {
2948 struct target_signal_frame *frame;
2949 abi_ulong frame_addr;
2950 int err = 0;
2951 int i;
2952
2953 frame_addr = get_sigframe(env, sizeof *frame);
2954 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2955 goto badframe;
2956
2957 /*
2958 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
2959 * use this trampoline anymore but it sets it up for GDB.
2960 * In QEMU, using the trampoline simplifies things a bit so we use it.
2961 *
2962 * This is movu.w __NR_sigreturn, r9; break 13;
2963 */
2964 err |= __put_user(0x9c5f, frame->retcode+0);
2965 err |= __put_user(TARGET_NR_sigreturn,
2966 frame->retcode+2);
2967 err |= __put_user(0xe93d, frame->retcode+4);
2968
2969 /* Save the mask. */
2970 err |= __put_user(set->sig[0], &frame->sc.oldmask);
2971 if (err)
2972 goto badframe;
2973
2974 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2975 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
2976 goto badframe;
2977 }
2978
2979 setup_sigcontext(&frame->sc, env);
2980
2981 /* Move the stack and setup the arguments for the handler. */
2982 env->regs[R_SP] = (uint32_t) (unsigned long) frame;
2983 env->regs[10] = sig;
2984 env->pc = (unsigned long) ka->_sa_handler;
2985 /* Link SRP so the guest returns through the trampoline. */
2986 env->pregs[PR_SRP] = (uint32_t) (unsigned long) &frame->retcode[0];
2987
2988 unlock_user_struct(frame, frame_addr, 1);
2989 return;
2990 badframe:
2991 unlock_user_struct(frame, frame_addr, 1);
2992 force_sig(TARGET_SIGSEGV);
2993 }
2994
2995 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2996 target_siginfo_t *info,
2997 target_sigset_t *set, CPUState *env)
2998 {
2999 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
3000 }
3001
3002 long do_sigreturn(CPUState *env)
3003 {
3004 struct target_signal_frame *frame;
3005 abi_ulong frame_addr;
3006 target_sigset_t target_set;
3007 sigset_t set;
3008 int i;
3009
3010 frame_addr = env->regs[R_SP];
3011 /* Make sure the guest isn't playing games. */
3012 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3013 goto badframe;
3014
3015 /* Restore blocked signals */
3016 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
3017 goto badframe;
3018 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3019 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3020 goto badframe;
3021 }
3022 target_to_host_sigset_internal(&set, &target_set);
3023 sigprocmask(SIG_SETMASK, &set, NULL);
3024
3025 restore_sigcontext(&frame->sc, env);
3026 /* Compensate for the syscall return path advancing brk. */
3027 env->pc -= 2;
3028
3029 unlock_user_struct(frame, frame_addr, 0);
3030 return env->regs[10];
3031 badframe:
3032 unlock_user_struct(frame, frame_addr, 0);
3033 force_sig(TARGET_SIGSEGV);
3034 }
3035
3036 long do_rt_sigreturn(CPUState *env)
3037 {
3038 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
3039 return -TARGET_ENOSYS;
3040 }
3041
3042 #else
3043
3044 static void setup_frame(int sig, struct target_sigaction *ka,
3045 target_sigset_t *set, CPUState *env)
3046 {
3047 fprintf(stderr, "setup_frame: not implemented\n");
3048 }
3049
3050 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3051 target_siginfo_t *info,
3052 target_sigset_t *set, CPUState *env)
3053 {
3054 fprintf(stderr, "setup_rt_frame: not implemented\n");
3055 }
3056
3057 long do_sigreturn(CPUState *env)
3058 {
3059 fprintf(stderr, "do_sigreturn: not implemented\n");
3060 return -TARGET_ENOSYS;
3061 }
3062
3063 long do_rt_sigreturn(CPUState *env)
3064 {
3065 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
3066 return -TARGET_ENOSYS;
3067 }
3068
3069 #endif
3070
3071 void process_pending_signals(CPUState *cpu_env)
3072 {
3073 int sig;
3074 abi_ulong handler;
3075 sigset_t set, old_set;
3076 target_sigset_t target_old_set;
3077 struct emulated_sigtable *k;
3078 struct target_sigaction *sa;
3079 struct sigqueue *q;
3080 TaskState *ts = cpu_env->opaque;
3081
3082 if (!ts->signal_pending)
3083 return;
3084
3085 /* FIXME: This is not threadsafe. */
3086 k = ts->sigtab;
3087 for(sig = 1; sig <= TARGET_NSIG; sig++) {
3088 if (k->pending)
3089 goto handle_signal;
3090 k++;
3091 }
3092 /* if no signal is pending, just return */
3093 ts->signal_pending = 0;
3094 return;
3095
3096 handle_signal:
3097 #ifdef DEBUG_SIGNAL
3098 fprintf(stderr, "qemu: process signal %d\n", sig);
3099 #endif
3100 /* dequeue signal */
3101 q = k->first;
3102 k->first = q->next;
3103 if (!k->first)
3104 k->pending = 0;
3105
3106 sig = gdb_handlesig (cpu_env, sig);
3107 if (!sig) {
3108 fprintf (stderr, "Lost signal\n");
3109 abort();
3110 }
3111
3112 sa = &sigact_table[sig - 1];
3113 handler = sa->_sa_handler;
3114 if (handler == TARGET_SIG_DFL) {
3115 /* default handler : ignore some signal. The other are fatal */
3116 if (sig != TARGET_SIGCHLD &&
3117 sig != TARGET_SIGURG &&
3118 sig != TARGET_SIGWINCH) {
3119 force_sig(sig);
3120 }
3121 } else if (handler == TARGET_SIG_IGN) {
3122 /* ignore sig */
3123 } else if (handler == TARGET_SIG_ERR) {
3124 force_sig(sig);
3125 } else {
3126 /* compute the blocked signals during the handler execution */
3127 target_to_host_sigset(&set, &sa->sa_mask);
3128 /* SA_NODEFER indicates that the current signal should not be
3129 blocked during the handler */
3130 if (!(sa->sa_flags & TARGET_SA_NODEFER))
3131 sigaddset(&set, target_to_host_signal(sig));
3132
3133 /* block signals in the handler using Linux */
3134 sigprocmask(SIG_BLOCK, &set, &old_set);
3135 /* save the previous blocked signal state to restore it at the
3136 end of the signal execution (see do_sigreturn) */
3137 host_to_target_sigset_internal(&target_old_set, &old_set);
3138
3139 /* if the CPU is in VM86 mode, we restore the 32 bit values */
3140 #if defined(TARGET_I386) && !defined(TARGET_X86_64)
3141 {
3142 CPUX86State *env = cpu_env;
3143 if (env->eflags & VM_MASK)
3144 save_v86_state(env);
3145 }
3146 #endif
3147 /* prepare the stack frame of the virtual CPU */
3148 if (sa->sa_flags & TARGET_SA_SIGINFO)
3149 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
3150 else
3151 setup_frame(sig, sa, &target_old_set, cpu_env);
3152 if (sa->sa_flags & TARGET_SA_RESETHAND)
3153 sa->_sa_handler = TARGET_SIG_DFL;
3154 }
3155 if (q != &k->info)
3156 free_sigqueue(cpu_env, q);
3157 }
Samsung s3c2440 and arm920t support for the mini2440 dev board