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Relax qemu_ld/st constraints for !SOFTMMU case
[qemu/mini2440.git] / linux-user / signal.c
blob8fb3469ccab2463667ac887fb50bdd11dd5666c0
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 #ifndef offsetof
553 #define offsetof(type, field) ((size_t) &((type *)0)->field)
554 #endif
555
556 static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
557 const target_siginfo_t *info)
558 {
559 tswap_siginfo(tinfo, info);
560 return 0;
561 }
562
563 static inline int current_exec_domain_sig(int sig)
564 {
565 return /* current->exec_domain && current->exec_domain->signal_invmap
566 && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
567 }
568
569 #if defined(TARGET_I386) && TARGET_ABI_BITS == 32
570
571 /* from the Linux kernel */
572
573 struct target_fpreg {
574 uint16_t significand[4];
575 uint16_t exponent;
576 };
577
578 struct target_fpxreg {
579 uint16_t significand[4];
580 uint16_t exponent;
581 uint16_t padding[3];
582 };
583
584 struct target_xmmreg {
585 abi_ulong element[4];
586 };
587
588 struct target_fpstate {
589 /* Regular FPU environment */
590 abi_ulong cw;
591 abi_ulong sw;
592 abi_ulong tag;
593 abi_ulong ipoff;
594 abi_ulong cssel;
595 abi_ulong dataoff;
596 abi_ulong datasel;
597 struct target_fpreg _st[8];
598 uint16_t status;
599 uint16_t magic; /* 0xffff = regular FPU data only */
600
601 /* FXSR FPU environment */
602 abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
603 abi_ulong mxcsr;
604 abi_ulong reserved;
605 struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
606 struct target_xmmreg _xmm[8];
607 abi_ulong padding[56];
608 };
609
610 #define X86_FXSR_MAGIC 0x0000
611
612 struct target_sigcontext {
613 uint16_t gs, __gsh;
614 uint16_t fs, __fsh;
615 uint16_t es, __esh;
616 uint16_t ds, __dsh;
617 abi_ulong edi;
618 abi_ulong esi;
619 abi_ulong ebp;
620 abi_ulong esp;
621 abi_ulong ebx;
622 abi_ulong edx;
623 abi_ulong ecx;
624 abi_ulong eax;
625 abi_ulong trapno;
626 abi_ulong err;
627 abi_ulong eip;
628 uint16_t cs, __csh;
629 abi_ulong eflags;
630 abi_ulong esp_at_signal;
631 uint16_t ss, __ssh;
632 abi_ulong fpstate; /* pointer */
633 abi_ulong oldmask;
634 abi_ulong cr2;
635 };
636
637 struct target_ucontext {
638 abi_ulong tuc_flags;
639 abi_ulong tuc_link;
640 target_stack_t tuc_stack;
641 struct target_sigcontext tuc_mcontext;
642 target_sigset_t tuc_sigmask; /* mask last for extensibility */
643 };
644
645 struct sigframe
646 {
647 abi_ulong pretcode;
648 int sig;
649 struct target_sigcontext sc;
650 struct target_fpstate fpstate;
651 abi_ulong extramask[TARGET_NSIG_WORDS-1];
652 char retcode[8];
653 };
654
655 struct rt_sigframe
656 {
657 abi_ulong pretcode;
658 int sig;
659 abi_ulong pinfo;
660 abi_ulong puc;
661 struct target_siginfo info;
662 struct target_ucontext uc;
663 struct target_fpstate fpstate;
664 char retcode[8];
665 };
666
667 /*
668 * Set up a signal frame.
669 */
670
671 /* XXX: save x87 state */
672 static int
673 setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
674 CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr)
675 {
676 int err = 0;
677 uint16_t magic;
678
679 /* already locked in setup_frame() */
680 err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
681 err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
682 err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
683 err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
684 err |= __put_user(env->regs[R_EDI], &sc->edi);
685 err |= __put_user(env->regs[R_ESI], &sc->esi);
686 err |= __put_user(env->regs[R_EBP], &sc->ebp);
687 err |= __put_user(env->regs[R_ESP], &sc->esp);
688 err |= __put_user(env->regs[R_EBX], &sc->ebx);
689 err |= __put_user(env->regs[R_EDX], &sc->edx);
690 err |= __put_user(env->regs[R_ECX], &sc->ecx);
691 err |= __put_user(env->regs[R_EAX], &sc->eax);
692 err |= __put_user(env->exception_index, &sc->trapno);
693 err |= __put_user(env->error_code, &sc->err);
694 err |= __put_user(env->eip, &sc->eip);
695 err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
696 err |= __put_user(env->eflags, &sc->eflags);
697 err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
698 err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
699
700 cpu_x86_fsave(env, fpstate_addr, 1);
701 fpstate->status = fpstate->sw;
702 magic = 0xffff;
703 err |= __put_user(magic, &fpstate->magic);
704 err |= __put_user(fpstate_addr, &sc->fpstate);
705
706 /* non-iBCS2 extensions.. */
707 err |= __put_user(mask, &sc->oldmask);
708 err |= __put_user(env->cr[2], &sc->cr2);
709 return err;
710 }
711
712 /*
713 * Determine which stack to use..
714 */
715
716 static inline abi_ulong
717 get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
718 {
719 unsigned long esp;
720
721 /* Default to using normal stack */
722 esp = env->regs[R_ESP];
723 /* This is the X/Open sanctioned signal stack switching. */
724 if (ka->sa_flags & TARGET_SA_ONSTACK) {
725 if (sas_ss_flags(esp) == 0)
726 esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
727 }
728
729 /* This is the legacy signal stack switching. */
730 else
731 if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
732 !(ka->sa_flags & TARGET_SA_RESTORER) &&
733 ka->sa_restorer) {
734 esp = (unsigned long) ka->sa_restorer;
735 }
736 return (esp - frame_size) & -8ul;
737 }
738
739 /* compare linux/arch/i386/kernel/signal.c:setup_frame() */
740 static void setup_frame(int sig, struct target_sigaction *ka,
741 target_sigset_t *set, CPUX86State *env)
742 {
743 abi_ulong frame_addr;
744 struct sigframe *frame;
745 int i, err = 0;
746
747 frame_addr = get_sigframe(ka, env, sizeof(*frame));
748
749 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
750 goto give_sigsegv;
751
752 err |= __put_user(current_exec_domain_sig(sig),
753 &frame->sig);
754 if (err)
755 goto give_sigsegv;
756
757 setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
758 frame_addr + offsetof(struct sigframe, fpstate));
759 if (err)
760 goto give_sigsegv;
761
762 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
763 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
764 goto give_sigsegv;
765 }
766
767 /* Set up to return from userspace. If provided, use a stub
768 already in userspace. */
769 if (ka->sa_flags & TARGET_SA_RESTORER) {
770 err |= __put_user(ka->sa_restorer, &frame->pretcode);
771 } else {
772 uint16_t val16;
773 abi_ulong retcode_addr;
774 retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
775 err |= __put_user(retcode_addr, &frame->pretcode);
776 /* This is popl %eax ; movl $,%eax ; int $0x80 */
777 val16 = 0xb858;
778 err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
779 err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
780 val16 = 0x80cd;
781 err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
782 }
783
784 if (err)
785 goto give_sigsegv;
786
787 /* Set up registers for signal handler */
788 env->regs[R_ESP] = frame_addr;
789 env->eip = ka->_sa_handler;
790
791 cpu_x86_load_seg(env, R_DS, __USER_DS);
792 cpu_x86_load_seg(env, R_ES, __USER_DS);
793 cpu_x86_load_seg(env, R_SS, __USER_DS);
794 cpu_x86_load_seg(env, R_CS, __USER_CS);
795 env->eflags &= ~TF_MASK;
796
797 unlock_user_struct(frame, frame_addr, 1);
798
799 return;
800
801 give_sigsegv:
802 unlock_user_struct(frame, frame_addr, 1);
803 if (sig == TARGET_SIGSEGV)
804 ka->_sa_handler = TARGET_SIG_DFL;
805 force_sig(TARGET_SIGSEGV /* , current */);
806 }
807
808 /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
809 static void setup_rt_frame(int sig, struct target_sigaction *ka,
810 target_siginfo_t *info,
811 target_sigset_t *set, CPUX86State *env)
812 {
813 abi_ulong frame_addr, addr;
814 struct rt_sigframe *frame;
815 int i, err = 0;
816
817 frame_addr = get_sigframe(ka, env, sizeof(*frame));
818
819 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
820 goto give_sigsegv;
821
822 err |= __put_user(current_exec_domain_sig(sig),
823 &frame->sig);
824 addr = frame_addr + offsetof(struct rt_sigframe, info);
825 err |= __put_user(addr, &frame->pinfo);
826 addr = frame_addr + offsetof(struct rt_sigframe, uc);
827 err |= __put_user(addr, &frame->puc);
828 err |= copy_siginfo_to_user(&frame->info, info);
829 if (err)
830 goto give_sigsegv;
831
832 /* Create the ucontext. */
833 err |= __put_user(0, &frame->uc.tuc_flags);
834 err |= __put_user(0, &frame->uc.tuc_link);
835 err |= __put_user(target_sigaltstack_used.ss_sp,
836 &frame->uc.tuc_stack.ss_sp);
837 err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
838 &frame->uc.tuc_stack.ss_flags);
839 err |= __put_user(target_sigaltstack_used.ss_size,
840 &frame->uc.tuc_stack.ss_size);
841 err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
842 env, set->sig[0],
843 frame_addr + offsetof(struct rt_sigframe, fpstate));
844 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
845 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
846 goto give_sigsegv;
847 }
848
849 /* Set up to return from userspace. If provided, use a stub
850 already in userspace. */
851 if (ka->sa_flags & TARGET_SA_RESTORER) {
852 err |= __put_user(ka->sa_restorer, &frame->pretcode);
853 } else {
854 uint16_t val16;
855 addr = frame_addr + offsetof(struct rt_sigframe, retcode);
856 err |= __put_user(addr, &frame->pretcode);
857 /* This is movl $,%eax ; int $0x80 */
858 err |= __put_user(0xb8, (char *)(frame->retcode+0));
859 err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
860 val16 = 0x80cd;
861 err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
862 }
863
864 if (err)
865 goto give_sigsegv;
866
867 /* Set up registers for signal handler */
868 env->regs[R_ESP] = frame_addr;
869 env->eip = ka->_sa_handler;
870
871 cpu_x86_load_seg(env, R_DS, __USER_DS);
872 cpu_x86_load_seg(env, R_ES, __USER_DS);
873 cpu_x86_load_seg(env, R_SS, __USER_DS);
874 cpu_x86_load_seg(env, R_CS, __USER_CS);
875 env->eflags &= ~TF_MASK;
876
877 unlock_user_struct(frame, frame_addr, 1);
878
879 return;
880
881 give_sigsegv:
882 unlock_user_struct(frame, frame_addr, 1);
883 if (sig == TARGET_SIGSEGV)
884 ka->_sa_handler = TARGET_SIG_DFL;
885 force_sig(TARGET_SIGSEGV /* , current */);
886 }
887
888 static int
889 restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
890 {
891 unsigned int err = 0;
892 abi_ulong fpstate_addr;
893 unsigned int tmpflags;
894
895 cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
896 cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
897 cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
898 cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
899
900 env->regs[R_EDI] = tswapl(sc->edi);
901 env->regs[R_ESI] = tswapl(sc->esi);
902 env->regs[R_EBP] = tswapl(sc->ebp);
903 env->regs[R_ESP] = tswapl(sc->esp);
904 env->regs[R_EBX] = tswapl(sc->ebx);
905 env->regs[R_EDX] = tswapl(sc->edx);
906 env->regs[R_ECX] = tswapl(sc->ecx);
907 env->eip = tswapl(sc->eip);
908
909 cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
910 cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
911
912 tmpflags = tswapl(sc->eflags);
913 env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
914 // regs->orig_eax = -1; /* disable syscall checks */
915
916 fpstate_addr = tswapl(sc->fpstate);
917 if (fpstate_addr != 0) {
918 if (!access_ok(VERIFY_READ, fpstate_addr,
919 sizeof(struct target_fpstate)))
920 goto badframe;
921 cpu_x86_frstor(env, fpstate_addr, 1);
922 }
923
924 *peax = tswapl(sc->eax);
925 return err;
926 badframe:
927 return 1;
928 }
929
930 long do_sigreturn(CPUX86State *env)
931 {
932 struct sigframe *frame;
933 abi_ulong frame_addr = env->regs[R_ESP] - 8;
934 target_sigset_t target_set;
935 sigset_t set;
936 int eax, i;
937
938 #if defined(DEBUG_SIGNAL)
939 fprintf(stderr, "do_sigreturn\n");
940 #endif
941 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
942 goto badframe;
943 /* set blocked signals */
944 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
945 goto badframe;
946 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
947 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
948 goto badframe;
949 }
950
951 target_to_host_sigset_internal(&set, &target_set);
952 sigprocmask(SIG_SETMASK, &set, NULL);
953
954 /* restore registers */
955 if (restore_sigcontext(env, &frame->sc, &eax))
956 goto badframe;
957 unlock_user_struct(frame, frame_addr, 0);
958 return eax;
959
960 badframe:
961 unlock_user_struct(frame, frame_addr, 0);
962 force_sig(TARGET_SIGSEGV);
963 return 0;
964 }
965
966 long do_rt_sigreturn(CPUX86State *env)
967 {
968 abi_ulong frame_addr;
969 struct rt_sigframe *frame;
970 sigset_t set;
971 int eax;
972
973 frame_addr = env->regs[R_ESP] - 4;
974 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
975 goto badframe;
976 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
977 sigprocmask(SIG_SETMASK, &set, NULL);
978
979 if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
980 goto badframe;
981
982 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
983 get_sp_from_cpustate(env)) == -EFAULT)
984 goto badframe;
985
986 unlock_user_struct(frame, frame_addr, 0);
987 return eax;
988
989 badframe:
990 unlock_user_struct(frame, frame_addr, 0);
991 force_sig(TARGET_SIGSEGV);
992 return 0;
993 }
994
995 #elif defined(TARGET_ARM)
996
997 struct target_sigcontext {
998 abi_ulong trap_no;
999 abi_ulong error_code;
1000 abi_ulong oldmask;
1001 abi_ulong arm_r0;
1002 abi_ulong arm_r1;
1003 abi_ulong arm_r2;
1004 abi_ulong arm_r3;
1005 abi_ulong arm_r4;
1006 abi_ulong arm_r5;
1007 abi_ulong arm_r6;
1008 abi_ulong arm_r7;
1009 abi_ulong arm_r8;
1010 abi_ulong arm_r9;
1011 abi_ulong arm_r10;
1012 abi_ulong arm_fp;
1013 abi_ulong arm_ip;
1014 abi_ulong arm_sp;
1015 abi_ulong arm_lr;
1016 abi_ulong arm_pc;
1017 abi_ulong arm_cpsr;
1018 abi_ulong fault_address;
1019 };
1020
1021 struct target_ucontext_v1 {
1022 abi_ulong tuc_flags;
1023 abi_ulong tuc_link;
1024 target_stack_t tuc_stack;
1025 struct target_sigcontext tuc_mcontext;
1026 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1027 };
1028
1029 struct target_ucontext_v2 {
1030 abi_ulong tuc_flags;
1031 abi_ulong tuc_link;
1032 target_stack_t tuc_stack;
1033 struct target_sigcontext tuc_mcontext;
1034 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1035 char __unused[128 - sizeof(sigset_t)];
1036 abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
1037 };
1038
1039 struct sigframe_v1
1040 {
1041 struct target_sigcontext sc;
1042 abi_ulong extramask[TARGET_NSIG_WORDS-1];
1043 abi_ulong retcode;
1044 };
1045
1046 struct sigframe_v2
1047 {
1048 struct target_ucontext_v2 uc;
1049 abi_ulong retcode;
1050 };
1051
1052 struct rt_sigframe_v1
1053 {
1054 abi_ulong pinfo;
1055 abi_ulong puc;
1056 struct target_siginfo info;
1057 struct target_ucontext_v1 uc;
1058 abi_ulong retcode;
1059 };
1060
1061 struct rt_sigframe_v2
1062 {
1063 struct target_siginfo info;
1064 struct target_ucontext_v2 uc;
1065 abi_ulong retcode;
1066 };
1067
1068 #define TARGET_CONFIG_CPU_32 1
1069
1070 /*
1071 * For ARM syscalls, we encode the syscall number into the instruction.
1072 */
1073 #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
1074 #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
1075
1076 /*
1077 * For Thumb syscalls, we pass the syscall number via r7. We therefore
1078 * need two 16-bit instructions.
1079 */
1080 #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
1081 #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
1082
1083 static const abi_ulong retcodes[4] = {
1084 SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
1085 SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
1086 };
1087
1088
1089 #define __get_user_error(x,p,e) __get_user(x, p)
1090
1091 static inline int valid_user_regs(CPUState *regs)
1092 {
1093 return 1;
1094 }
1095
1096 static void
1097 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1098 CPUState *env, abi_ulong mask)
1099 {
1100 __put_user(env->regs[0], &sc->arm_r0);
1101 __put_user(env->regs[1], &sc->arm_r1);
1102 __put_user(env->regs[2], &sc->arm_r2);
1103 __put_user(env->regs[3], &sc->arm_r3);
1104 __put_user(env->regs[4], &sc->arm_r4);
1105 __put_user(env->regs[5], &sc->arm_r5);
1106 __put_user(env->regs[6], &sc->arm_r6);
1107 __put_user(env->regs[7], &sc->arm_r7);
1108 __put_user(env->regs[8], &sc->arm_r8);
1109 __put_user(env->regs[9], &sc->arm_r9);
1110 __put_user(env->regs[10], &sc->arm_r10);
1111 __put_user(env->regs[11], &sc->arm_fp);
1112 __put_user(env->regs[12], &sc->arm_ip);
1113 __put_user(env->regs[13], &sc->arm_sp);
1114 __put_user(env->regs[14], &sc->arm_lr);
1115 __put_user(env->regs[15], &sc->arm_pc);
1116 #ifdef TARGET_CONFIG_CPU_32
1117 __put_user(cpsr_read(env), &sc->arm_cpsr);
1118 #endif
1119
1120 __put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
1121 __put_user(/* current->thread.error_code */ 0, &sc->error_code);
1122 __put_user(/* current->thread.address */ 0, &sc->fault_address);
1123 __put_user(mask, &sc->oldmask);
1124 }
1125
1126 static inline abi_ulong
1127 get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize)
1128 {
1129 unsigned long sp = regs->regs[13];
1130
1131 /*
1132 * This is the X/Open sanctioned signal stack switching.
1133 */
1134 if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
1135 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1136 /*
1137 * ATPCS B01 mandates 8-byte alignment
1138 */
1139 return (sp - framesize) & ~7;
1140 }
1141
1142 static int
1143 setup_return(CPUState *env, struct target_sigaction *ka,
1144 abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
1145 {
1146 abi_ulong handler = ka->_sa_handler;
1147 abi_ulong retcode;
1148 int thumb = handler & 1;
1149
1150 if (ka->sa_flags & TARGET_SA_RESTORER) {
1151 retcode = ka->sa_restorer;
1152 } else {
1153 unsigned int idx = thumb;
1154
1155 if (ka->sa_flags & TARGET_SA_SIGINFO)
1156 idx += 2;
1157
1158 if (__put_user(retcodes[idx], rc))
1159 return 1;
1160 #if 0
1161 flush_icache_range((abi_ulong)rc,
1162 (abi_ulong)(rc + 1));
1163 #endif
1164 retcode = rc_addr + thumb;
1165 }
1166
1167 env->regs[0] = usig;
1168 env->regs[13] = frame_addr;
1169 env->regs[14] = retcode;
1170 env->regs[15] = handler & (thumb ? ~1 : ~3);
1171 env->thumb = thumb;
1172
1173 #if 0
1174 #ifdef TARGET_CONFIG_CPU_32
1175 env->cpsr = cpsr;
1176 #endif
1177 #endif
1178
1179 return 0;
1180 }
1181
1182 static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
1183 target_sigset_t *set, CPUState *env)
1184 {
1185 struct target_sigaltstack stack;
1186 int i;
1187
1188 /* Clear all the bits of the ucontext we don't use. */
1189 memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
1190
1191 memset(&stack, 0, sizeof(stack));
1192 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1193 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1194 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1195 memcpy(&uc->tuc_stack, &stack, sizeof(stack));
1196
1197 setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
1198 /* FIXME: Save coprocessor signal frame. */
1199 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1200 __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
1201 }
1202 }
1203
1204 /* compare linux/arch/arm/kernel/signal.c:setup_frame() */
1205 static void setup_frame_v1(int usig, struct target_sigaction *ka,
1206 target_sigset_t *set, CPUState *regs)
1207 {
1208 struct sigframe_v1 *frame;
1209 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1210 int i;
1211
1212 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1213 return;
1214
1215 setup_sigcontext(&frame->sc, regs, set->sig[0]);
1216
1217 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1218 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
1219 goto end;
1220 }
1221
1222 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1223 frame_addr + offsetof(struct sigframe_v1, retcode));
1224
1225 end:
1226 unlock_user_struct(frame, frame_addr, 1);
1227 }
1228
1229 static void setup_frame_v2(int usig, struct target_sigaction *ka,
1230 target_sigset_t *set, CPUState *regs)
1231 {
1232 struct sigframe_v2 *frame;
1233 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1234
1235 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1236 return;
1237
1238 setup_sigframe_v2(&frame->uc, set, regs);
1239
1240 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1241 frame_addr + offsetof(struct sigframe_v2, retcode));
1242
1243 unlock_user_struct(frame, frame_addr, 1);
1244 }
1245
1246 static void setup_frame(int usig, struct target_sigaction *ka,
1247 target_sigset_t *set, CPUState *regs)
1248 {
1249 if (get_osversion() >= 0x020612) {
1250 setup_frame_v2(usig, ka, set, regs);
1251 } else {
1252 setup_frame_v1(usig, ka, set, regs);
1253 }
1254 }
1255
1256 /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
1257 static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
1258 target_siginfo_t *info,
1259 target_sigset_t *set, CPUState *env)
1260 {
1261 struct rt_sigframe_v1 *frame;
1262 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1263 struct target_sigaltstack stack;
1264 int i;
1265 abi_ulong info_addr, uc_addr;
1266
1267 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1268 return /* 1 */;
1269
1270 info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
1271 __put_user(info_addr, &frame->pinfo);
1272 uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
1273 __put_user(uc_addr, &frame->puc);
1274 copy_siginfo_to_user(&frame->info, info);
1275
1276 /* Clear all the bits of the ucontext we don't use. */
1277 memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
1278
1279 memset(&stack, 0, sizeof(stack));
1280 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1281 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1282 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1283 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
1284
1285 setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
1286 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1287 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
1288 goto end;
1289 }
1290
1291 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1292 frame_addr + offsetof(struct rt_sigframe_v1, retcode));
1293
1294 env->regs[1] = info_addr;
1295 env->regs[2] = uc_addr;
1296
1297 end:
1298 unlock_user_struct(frame, frame_addr, 1);
1299 }
1300
1301 static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
1302 target_siginfo_t *info,
1303 target_sigset_t *set, CPUState *env)
1304 {
1305 struct rt_sigframe_v2 *frame;
1306 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1307 abi_ulong info_addr, uc_addr;
1308
1309 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1310 return /* 1 */;
1311
1312 info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
1313 uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
1314 copy_siginfo_to_user(&frame->info, info);
1315
1316 setup_sigframe_v2(&frame->uc, set, env);
1317
1318 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1319 frame_addr + offsetof(struct rt_sigframe_v2, retcode));
1320
1321 env->regs[1] = info_addr;
1322 env->regs[2] = uc_addr;
1323
1324 unlock_user_struct(frame, frame_addr, 1);
1325 }
1326
1327 static void setup_rt_frame(int usig, struct target_sigaction *ka,
1328 target_siginfo_t *info,
1329 target_sigset_t *set, CPUState *env)
1330 {
1331 if (get_osversion() >= 0x020612) {
1332 setup_rt_frame_v2(usig, ka, info, set, env);
1333 } else {
1334 setup_rt_frame_v1(usig, ka, info, set, env);
1335 }
1336 }
1337
1338 static int
1339 restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
1340 {
1341 int err = 0;
1342 uint32_t cpsr;
1343
1344 __get_user_error(env->regs[0], &sc->arm_r0, err);
1345 __get_user_error(env->regs[1], &sc->arm_r1, err);
1346 __get_user_error(env->regs[2], &sc->arm_r2, err);
1347 __get_user_error(env->regs[3], &sc->arm_r3, err);
1348 __get_user_error(env->regs[4], &sc->arm_r4, err);
1349 __get_user_error(env->regs[5], &sc->arm_r5, err);
1350 __get_user_error(env->regs[6], &sc->arm_r6, err);
1351 __get_user_error(env->regs[7], &sc->arm_r7, err);
1352 __get_user_error(env->regs[8], &sc->arm_r8, err);
1353 __get_user_error(env->regs[9], &sc->arm_r9, err);
1354 __get_user_error(env->regs[10], &sc->arm_r10, err);
1355 __get_user_error(env->regs[11], &sc->arm_fp, err);
1356 __get_user_error(env->regs[12], &sc->arm_ip, err);
1357 __get_user_error(env->regs[13], &sc->arm_sp, err);
1358 __get_user_error(env->regs[14], &sc->arm_lr, err);
1359 __get_user_error(env->regs[15], &sc->arm_pc, err);
1360 #ifdef TARGET_CONFIG_CPU_32
1361 __get_user_error(cpsr, &sc->arm_cpsr, err);
1362 cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC);
1363 #endif
1364
1365 err |= !valid_user_regs(env);
1366
1367 return err;
1368 }
1369
1370 long do_sigreturn_v1(CPUState *env)
1371 {
1372 abi_ulong frame_addr;
1373 struct sigframe_v1 *frame;
1374 target_sigset_t set;
1375 sigset_t host_set;
1376 int i;
1377
1378 /*
1379 * Since we stacked the signal on a 64-bit boundary,
1380 * then 'sp' should be word aligned here. If it's
1381 * not, then the user is trying to mess with us.
1382 */
1383 if (env->regs[13] & 7)
1384 goto badframe;
1385
1386 frame_addr = env->regs[13];
1387 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1388 goto badframe;
1389
1390 if (__get_user(set.sig[0], &frame->sc.oldmask))
1391 goto badframe;
1392 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1393 if (__get_user(set.sig[i], &frame->extramask[i - 1]))
1394 goto badframe;
1395 }
1396
1397 target_to_host_sigset_internal(&host_set, &set);
1398 sigprocmask(SIG_SETMASK, &host_set, NULL);
1399
1400 if (restore_sigcontext(env, &frame->sc))
1401 goto badframe;
1402
1403 #if 0
1404 /* Send SIGTRAP if we're single-stepping */
1405 if (ptrace_cancel_bpt(current))
1406 send_sig(SIGTRAP, current, 1);
1407 #endif
1408 unlock_user_struct(frame, frame_addr, 0);
1409 return env->regs[0];
1410
1411 badframe:
1412 unlock_user_struct(frame, frame_addr, 0);
1413 force_sig(SIGSEGV /* , current */);
1414 return 0;
1415 }
1416
1417 static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr,
1418 struct target_ucontext_v2 *uc)
1419 {
1420 sigset_t host_set;
1421
1422 target_to_host_sigset(&host_set, &uc->tuc_sigmask);
1423 sigprocmask(SIG_SETMASK, &host_set, NULL);
1424
1425 if (restore_sigcontext(env, &uc->tuc_mcontext))
1426 return 1;
1427
1428 if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1429 return 1;
1430
1431 #if 0
1432 /* Send SIGTRAP if we're single-stepping */
1433 if (ptrace_cancel_bpt(current))
1434 send_sig(SIGTRAP, current, 1);
1435 #endif
1436
1437 return 0;
1438 }
1439
1440 long do_sigreturn_v2(CPUState *env)
1441 {
1442 abi_ulong frame_addr;
1443 struct sigframe_v2 *frame;
1444
1445 /*
1446 * Since we stacked the signal on a 64-bit boundary,
1447 * then 'sp' should be word aligned here. If it's
1448 * not, then the user is trying to mess with us.
1449 */
1450 if (env->regs[13] & 7)
1451 goto badframe;
1452
1453 frame_addr = env->regs[13];
1454 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1455 goto badframe;
1456
1457 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1458 goto badframe;
1459
1460 unlock_user_struct(frame, frame_addr, 0);
1461 return env->regs[0];
1462
1463 badframe:
1464 unlock_user_struct(frame, frame_addr, 0);
1465 force_sig(SIGSEGV /* , current */);
1466 return 0;
1467 }
1468
1469 long do_sigreturn(CPUState *env)
1470 {
1471 if (get_osversion() >= 0x020612) {
1472 return do_sigreturn_v2(env);
1473 } else {
1474 return do_sigreturn_v1(env);
1475 }
1476 }
1477
1478 long do_rt_sigreturn_v1(CPUState *env)
1479 {
1480 abi_ulong frame_addr;
1481 struct rt_sigframe_v1 *frame;
1482 sigset_t host_set;
1483
1484 /*
1485 * Since we stacked the signal on a 64-bit boundary,
1486 * then 'sp' should be word aligned here. If it's
1487 * not, then the user is trying to mess with us.
1488 */
1489 if (env->regs[13] & 7)
1490 goto badframe;
1491
1492 frame_addr = env->regs[13];
1493 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1494 goto badframe;
1495
1496 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
1497 sigprocmask(SIG_SETMASK, &host_set, NULL);
1498
1499 if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
1500 goto badframe;
1501
1502 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1503 goto badframe;
1504
1505 #if 0
1506 /* Send SIGTRAP if we're single-stepping */
1507 if (ptrace_cancel_bpt(current))
1508 send_sig(SIGTRAP, current, 1);
1509 #endif
1510 unlock_user_struct(frame, frame_addr, 0);
1511 return env->regs[0];
1512
1513 badframe:
1514 unlock_user_struct(frame, frame_addr, 0);
1515 force_sig(SIGSEGV /* , current */);
1516 return 0;
1517 }
1518
1519 long do_rt_sigreturn_v2(CPUState *env)
1520 {
1521 abi_ulong frame_addr;
1522 struct rt_sigframe_v2 *frame;
1523
1524 /*
1525 * Since we stacked the signal on a 64-bit boundary,
1526 * then 'sp' should be word aligned here. If it's
1527 * not, then the user is trying to mess with us.
1528 */
1529 if (env->regs[13] & 7)
1530 goto badframe;
1531
1532 frame_addr = env->regs[13];
1533 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1534 goto badframe;
1535
1536 if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
1537 goto badframe;
1538
1539 unlock_user_struct(frame, frame_addr, 0);
1540 return env->regs[0];
1541
1542 badframe:
1543 unlock_user_struct(frame, frame_addr, 0);
1544 force_sig(SIGSEGV /* , current */);
1545 return 0;
1546 }
1547
1548 long do_rt_sigreturn(CPUState *env)
1549 {
1550 if (get_osversion() >= 0x020612) {
1551 return do_rt_sigreturn_v2(env);
1552 } else {
1553 return do_rt_sigreturn_v1(env);
1554 }
1555 }
1556
1557 #elif defined(TARGET_SPARC)
1558
1559 #define __SUNOS_MAXWIN 31
1560
1561 /* This is what SunOS does, so shall I. */
1562 struct target_sigcontext {
1563 abi_ulong sigc_onstack; /* state to restore */
1564
1565 abi_ulong sigc_mask; /* sigmask to restore */
1566 abi_ulong sigc_sp; /* stack pointer */
1567 abi_ulong sigc_pc; /* program counter */
1568 abi_ulong sigc_npc; /* next program counter */
1569 abi_ulong sigc_psr; /* for condition codes etc */
1570 abi_ulong sigc_g1; /* User uses these two registers */
1571 abi_ulong sigc_o0; /* within the trampoline code. */
1572
1573 /* Now comes information regarding the users window set
1574 * at the time of the signal.
1575 */
1576 abi_ulong sigc_oswins; /* outstanding windows */
1577
1578 /* stack ptrs for each regwin buf */
1579 char *sigc_spbuf[__SUNOS_MAXWIN];
1580
1581 /* Windows to restore after signal */
1582 struct {
1583 abi_ulong locals[8];
1584 abi_ulong ins[8];
1585 } sigc_wbuf[__SUNOS_MAXWIN];
1586 };
1587 /* A Sparc stack frame */
1588 struct sparc_stackf {
1589 abi_ulong locals[8];
1590 abi_ulong ins[6];
1591 struct sparc_stackf *fp;
1592 abi_ulong callers_pc;
1593 char *structptr;
1594 abi_ulong xargs[6];
1595 abi_ulong xxargs[1];
1596 };
1597
1598 typedef struct {
1599 struct {
1600 abi_ulong psr;
1601 abi_ulong pc;
1602 abi_ulong npc;
1603 abi_ulong y;
1604 abi_ulong u_regs[16]; /* globals and ins */
1605 } si_regs;
1606 int si_mask;
1607 } __siginfo_t;
1608
1609 typedef struct {
1610 unsigned long si_float_regs [32];
1611 unsigned long si_fsr;
1612 unsigned long si_fpqdepth;
1613 struct {
1614 unsigned long *insn_addr;
1615 unsigned long insn;
1616 } si_fpqueue [16];
1617 } qemu_siginfo_fpu_t;
1618
1619
1620 struct target_signal_frame {
1621 struct sparc_stackf ss;
1622 __siginfo_t info;
1623 abi_ulong fpu_save;
1624 abi_ulong insns[2] __attribute__ ((aligned (8)));
1625 abi_ulong extramask[TARGET_NSIG_WORDS - 1];
1626 abi_ulong extra_size; /* Should be 0 */
1627 qemu_siginfo_fpu_t fpu_state;
1628 };
1629 struct target_rt_signal_frame {
1630 struct sparc_stackf ss;
1631 siginfo_t info;
1632 abi_ulong regs[20];
1633 sigset_t mask;
1634 abi_ulong fpu_save;
1635 unsigned int insns[2];
1636 stack_t stack;
1637 unsigned int extra_size; /* Should be 0 */
1638 qemu_siginfo_fpu_t fpu_state;
1639 };
1640
1641 #define UREG_O0 16
1642 #define UREG_O6 22
1643 #define UREG_I0 0
1644 #define UREG_I1 1
1645 #define UREG_I2 2
1646 #define UREG_I3 3
1647 #define UREG_I4 4
1648 #define UREG_I5 5
1649 #define UREG_I6 6
1650 #define UREG_I7 7
1651 #define UREG_L0 8
1652 #define UREG_FP UREG_I6
1653 #define UREG_SP UREG_O6
1654
1655 static inline abi_ulong get_sigframe(struct target_sigaction *sa,
1656 CPUState *env, unsigned long framesize)
1657 {
1658 abi_ulong sp;
1659
1660 sp = env->regwptr[UREG_FP];
1661
1662 /* This is the X/Open sanctioned signal stack switching. */
1663 if (sa->sa_flags & TARGET_SA_ONSTACK) {
1664 if (!on_sig_stack(sp)
1665 && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
1666 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1667 }
1668 return sp - framesize;
1669 }
1670
1671 static int
1672 setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask)
1673 {
1674 int err = 0, i;
1675
1676 err |= __put_user(env->psr, &si->si_regs.psr);
1677 err |= __put_user(env->pc, &si->si_regs.pc);
1678 err |= __put_user(env->npc, &si->si_regs.npc);
1679 err |= __put_user(env->y, &si->si_regs.y);
1680 for (i=0; i < 8; i++) {
1681 err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
1682 }
1683 for (i=0; i < 8; i++) {
1684 err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
1685 }
1686 err |= __put_user(mask, &si->si_mask);
1687 return err;
1688 }
1689
1690 #if 0
1691 static int
1692 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1693 CPUState *env, unsigned long mask)
1694 {
1695 int err = 0;
1696
1697 err |= __put_user(mask, &sc->sigc_mask);
1698 err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
1699 err |= __put_user(env->pc, &sc->sigc_pc);
1700 err |= __put_user(env->npc, &sc->sigc_npc);
1701 err |= __put_user(env->psr, &sc->sigc_psr);
1702 err |= __put_user(env->gregs[1], &sc->sigc_g1);
1703 err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
1704
1705 return err;
1706 }
1707 #endif
1708 #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
1709
1710 static void setup_frame(int sig, struct target_sigaction *ka,
1711 target_sigset_t *set, CPUState *env)
1712 {
1713 abi_ulong sf_addr;
1714 struct target_signal_frame *sf;
1715 int sigframe_size, err, i;
1716
1717 /* 1. Make sure everything is clean */
1718 //synchronize_user_stack();
1719
1720 sigframe_size = NF_ALIGNEDSZ;
1721 sf_addr = get_sigframe(ka, env, sigframe_size);
1722
1723 sf = lock_user(VERIFY_WRITE, sf_addr,
1724 sizeof(struct target_signal_frame), 0);
1725 if (!sf)
1726 goto sigsegv;
1727
1728 //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1729 #if 0
1730 if (invalid_frame_pointer(sf, sigframe_size))
1731 goto sigill_and_return;
1732 #endif
1733 /* 2. Save the current process state */
1734 err = setup___siginfo(&sf->info, env, set->sig[0]);
1735 err |= __put_user(0, &sf->extra_size);
1736
1737 //err |= save_fpu_state(regs, &sf->fpu_state);
1738 //err |= __put_user(&sf->fpu_state, &sf->fpu_save);
1739
1740 err |= __put_user(set->sig[0], &sf->info.si_mask);
1741 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
1742 err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
1743 }
1744
1745 for (i = 0; i < 8; i++) {
1746 err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
1747 }
1748 for (i = 0; i < 8; i++) {
1749 err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
1750 }
1751 if (err)
1752 goto sigsegv;
1753
1754 /* 3. signal handler back-trampoline and parameters */
1755 env->regwptr[UREG_FP] = sf_addr;
1756 env->regwptr[UREG_I0] = sig;
1757 env->regwptr[UREG_I1] = sf_addr +
1758 offsetof(struct target_signal_frame, info);
1759 env->regwptr[UREG_I2] = sf_addr +
1760 offsetof(struct target_signal_frame, info);
1761
1762 /* 4. signal handler */
1763 env->pc = ka->_sa_handler;
1764 env->npc = (env->pc + 4);
1765 /* 5. return to kernel instructions */
1766 if (ka->sa_restorer)
1767 env->regwptr[UREG_I7] = ka->sa_restorer;
1768 else {
1769 uint32_t val32;
1770
1771 env->regwptr[UREG_I7] = sf_addr +
1772 offsetof(struct target_signal_frame, insns) - 2 * 4;
1773
1774 /* mov __NR_sigreturn, %g1 */
1775 val32 = 0x821020d8;
1776 err |= __put_user(val32, &sf->insns[0]);
1777
1778 /* t 0x10 */
1779 val32 = 0x91d02010;
1780 err |= __put_user(val32, &sf->insns[1]);
1781 if (err)
1782 goto sigsegv;
1783
1784 /* Flush instruction space. */
1785 //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
1786 // tb_flush(env);
1787 }
1788 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
1789 return;
1790 #if 0
1791 sigill_and_return:
1792 force_sig(TARGET_SIGILL);
1793 #endif
1794 sigsegv:
1795 //fprintf(stderr, "force_sig\n");
1796 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
1797 force_sig(TARGET_SIGSEGV);
1798 }
1799 static inline int
1800 restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu)
1801 {
1802 int err;
1803 #if 0
1804 #ifdef CONFIG_SMP
1805 if (current->flags & PF_USEDFPU)
1806 regs->psr &= ~PSR_EF;
1807 #else
1808 if (current == last_task_used_math) {
1809 last_task_used_math = 0;
1810 regs->psr &= ~PSR_EF;
1811 }
1812 #endif
1813 current->used_math = 1;
1814 current->flags &= ~PF_USEDFPU;
1815 #endif
1816 #if 0
1817 if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
1818 return -EFAULT;
1819 #endif
1820
1821 #if 0
1822 /* XXX: incorrect */
1823 err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
1824 (sizeof(unsigned long) * 32));
1825 #endif
1826 err |= __get_user(env->fsr, &fpu->si_fsr);
1827 #if 0
1828 err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
1829 if (current->thread.fpqdepth != 0)
1830 err |= __copy_from_user(&current->thread.fpqueue[0],
1831 &fpu->si_fpqueue[0],
1832 ((sizeof(unsigned long) +
1833 (sizeof(unsigned long *)))*16));
1834 #endif
1835 return err;
1836 }
1837
1838
1839 static void setup_rt_frame(int sig, struct target_sigaction *ka,
1840 target_siginfo_t *info,
1841 target_sigset_t *set, CPUState *env)
1842 {
1843 fprintf(stderr, "setup_rt_frame: not implemented\n");
1844 }
1845
1846 long do_sigreturn(CPUState *env)
1847 {
1848 abi_ulong sf_addr;
1849 struct target_signal_frame *sf;
1850 uint32_t up_psr, pc, npc;
1851 target_sigset_t set;
1852 sigset_t host_set;
1853 abi_ulong fpu_save_addr;
1854 int err, i;
1855
1856 sf_addr = env->regwptr[UREG_FP];
1857 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1))
1858 goto segv_and_exit;
1859 #if 0
1860 fprintf(stderr, "sigreturn\n");
1861 fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1862 #endif
1863 //cpu_dump_state(env, stderr, fprintf, 0);
1864
1865 /* 1. Make sure we are not getting garbage from the user */
1866
1867 if (sf_addr & 3)
1868 goto segv_and_exit;
1869
1870 err = __get_user(pc, &sf->info.si_regs.pc);
1871 err |= __get_user(npc, &sf->info.si_regs.npc);
1872
1873 if ((pc | npc) & 3)
1874 goto segv_and_exit;
1875
1876 /* 2. Restore the state */
1877 err |= __get_user(up_psr, &sf->info.si_regs.psr);
1878
1879 /* User can only change condition codes and FPU enabling in %psr. */
1880 env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
1881 | (env->psr & ~(PSR_ICC /* | PSR_EF */));
1882
1883 env->pc = pc;
1884 env->npc = npc;
1885 err |= __get_user(env->y, &sf->info.si_regs.y);
1886 for (i=0; i < 8; i++) {
1887 err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
1888 }
1889 for (i=0; i < 8; i++) {
1890 err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
1891 }
1892
1893 err |= __get_user(fpu_save_addr, &sf->fpu_save);
1894
1895 //if (fpu_save)
1896 // err |= restore_fpu_state(env, fpu_save);
1897
1898 /* This is pretty much atomic, no amount locking would prevent
1899 * the races which exist anyways.
1900 */
1901 err |= __get_user(set.sig[0], &sf->info.si_mask);
1902 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1903 err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
1904 }
1905
1906 target_to_host_sigset_internal(&host_set, &set);
1907 sigprocmask(SIG_SETMASK, &host_set, NULL);
1908
1909 if (err)
1910 goto segv_and_exit;
1911 unlock_user_struct(sf, sf_addr, 0);
1912 return env->regwptr[0];
1913
1914 segv_and_exit:
1915 unlock_user_struct(sf, sf_addr, 0);
1916 force_sig(TARGET_SIGSEGV);
1917 }
1918
1919 long do_rt_sigreturn(CPUState *env)
1920 {
1921 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
1922 return -TARGET_ENOSYS;
1923 }
1924
1925 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
1926 #define MC_TSTATE 0
1927 #define MC_PC 1
1928 #define MC_NPC 2
1929 #define MC_Y 3
1930 #define MC_G1 4
1931 #define MC_G2 5
1932 #define MC_G3 6
1933 #define MC_G4 7
1934 #define MC_G5 8
1935 #define MC_G6 9
1936 #define MC_G7 10
1937 #define MC_O0 11
1938 #define MC_O1 12
1939 #define MC_O2 13
1940 #define MC_O3 14
1941 #define MC_O4 15
1942 #define MC_O5 16
1943 #define MC_O6 17
1944 #define MC_O7 18
1945 #define MC_NGREG 19
1946
1947 typedef abi_ulong target_mc_greg_t;
1948 typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
1949
1950 struct target_mc_fq {
1951 abi_ulong *mcfq_addr;
1952 uint32_t mcfq_insn;
1953 };
1954
1955 struct target_mc_fpu {
1956 union {
1957 uint32_t sregs[32];
1958 uint64_t dregs[32];
1959 //uint128_t qregs[16];
1960 } mcfpu_fregs;
1961 abi_ulong mcfpu_fsr;
1962 abi_ulong mcfpu_fprs;
1963 abi_ulong mcfpu_gsr;
1964 struct target_mc_fq *mcfpu_fq;
1965 unsigned char mcfpu_qcnt;
1966 unsigned char mcfpu_qentsz;
1967 unsigned char mcfpu_enab;
1968 };
1969 typedef struct target_mc_fpu target_mc_fpu_t;
1970
1971 typedef struct {
1972 target_mc_gregset_t mc_gregs;
1973 target_mc_greg_t mc_fp;
1974 target_mc_greg_t mc_i7;
1975 target_mc_fpu_t mc_fpregs;
1976 } target_mcontext_t;
1977
1978 struct target_ucontext {
1979 struct target_ucontext *uc_link;
1980 abi_ulong uc_flags;
1981 target_sigset_t uc_sigmask;
1982 target_mcontext_t uc_mcontext;
1983 };
1984
1985 /* A V9 register window */
1986 struct target_reg_window {
1987 abi_ulong locals[8];
1988 abi_ulong ins[8];
1989 };
1990
1991 #define TARGET_STACK_BIAS 2047
1992
1993 /* {set, get}context() needed for 64-bit SparcLinux userland. */
1994 void sparc64_set_context(CPUSPARCState *env)
1995 {
1996 abi_ulong ucp_addr;
1997 struct target_ucontext *ucp;
1998 target_mc_gregset_t *grp;
1999 abi_ulong pc, npc, tstate;
2000 abi_ulong fp, i7, w_addr;
2001 unsigned char fenab;
2002 int err;
2003 unsigned int i;
2004
2005 ucp_addr = env->regwptr[UREG_I0];
2006 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1))
2007 goto do_sigsegv;
2008 grp = &ucp->uc_mcontext.mc_gregs;
2009 err = __get_user(pc, &((*grp)[MC_PC]));
2010 err |= __get_user(npc, &((*grp)[MC_NPC]));
2011 if (err || ((pc | npc) & 3))
2012 goto do_sigsegv;
2013 if (env->regwptr[UREG_I1]) {
2014 target_sigset_t target_set;
2015 sigset_t set;
2016
2017 if (TARGET_NSIG_WORDS == 1) {
2018 if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0]))
2019 goto do_sigsegv;
2020 } else {
2021 abi_ulong *src, *dst;
2022 src = ucp->uc_sigmask.sig;
2023 dst = target_set.sig;
2024 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2025 i++, dst++, src++)
2026 err |= __get_user(*dst, src);
2027 if (err)
2028 goto do_sigsegv;
2029 }
2030 target_to_host_sigset_internal(&set, &target_set);
2031 sigprocmask(SIG_SETMASK, &set, NULL);
2032 }
2033 env->pc = pc;
2034 env->npc = npc;
2035 err |= __get_user(env->y, &((*grp)[MC_Y]));
2036 err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
2037 env->asi = (tstate >> 24) & 0xff;
2038 PUT_CCR(env, tstate >> 32);
2039 PUT_CWP64(env, tstate & 0x1f);
2040 err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
2041 err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
2042 err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
2043 err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
2044 err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
2045 err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
2046 err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
2047 err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
2048 err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
2049 err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
2050 err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
2051 err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
2052 err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
2053 err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
2054 err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
2055
2056 err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp));
2057 err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7));
2058
2059 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2060 if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2061 abi_ulong) != 0)
2062 goto do_sigsegv;
2063 if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2064 abi_ulong) != 0)
2065 goto do_sigsegv;
2066 err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
2067 err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
2068 {
2069 uint32_t *src, *dst;
2070 src = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2071 dst = env->fpr;
2072 /* XXX: check that the CPU storage is the same as user context */
2073 for (i = 0; i < 64; i++, dst++, src++)
2074 err |= __get_user(*dst, src);
2075 }
2076 err |= __get_user(env->fsr,
2077 &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
2078 err |= __get_user(env->gsr,
2079 &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
2080 if (err)
2081 goto do_sigsegv;
2082 unlock_user_struct(ucp, ucp_addr, 0);
2083 return;
2084 do_sigsegv:
2085 unlock_user_struct(ucp, ucp_addr, 0);
2086 force_sig(SIGSEGV);
2087 }
2088
2089 void sparc64_get_context(CPUSPARCState *env)
2090 {
2091 abi_ulong ucp_addr;
2092 struct target_ucontext *ucp;
2093 target_mc_gregset_t *grp;
2094 target_mcontext_t *mcp;
2095 abi_ulong fp, i7, w_addr;
2096 int err;
2097 unsigned int i;
2098 target_sigset_t target_set;
2099 sigset_t set;
2100
2101 ucp_addr = env->regwptr[UREG_I0];
2102 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0))
2103 goto do_sigsegv;
2104
2105 mcp = &ucp->uc_mcontext;
2106 grp = &mcp->mc_gregs;
2107
2108 /* Skip over the trap instruction, first. */
2109 env->pc = env->npc;
2110 env->npc += 4;
2111
2112 err = 0;
2113
2114 sigprocmask(0, NULL, &set);
2115 host_to_target_sigset_internal(&target_set, &set);
2116 if (TARGET_NSIG_WORDS == 1) {
2117 err |= __put_user(target_set.sig[0],
2118 (abi_ulong *)&ucp->uc_sigmask);
2119 } else {
2120 abi_ulong *src, *dst;
2121 src = target_set.sig;
2122 dst = ucp->uc_sigmask.sig;
2123 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
2124 i++, dst++, src++)
2125 err |= __put_user(*src, dst);
2126 if (err)
2127 goto do_sigsegv;
2128 }
2129
2130 /* XXX: tstate must be saved properly */
2131 // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
2132 err |= __put_user(env->pc, &((*grp)[MC_PC]));
2133 err |= __put_user(env->npc, &((*grp)[MC_NPC]));
2134 err |= __put_user(env->y, &((*grp)[MC_Y]));
2135 err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
2136 err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
2137 err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
2138 err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
2139 err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
2140 err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
2141 err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
2142 err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
2143 err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
2144 err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
2145 err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
2146 err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
2147 err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
2148 err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
2149 err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
2150
2151 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2152 fp = i7 = 0;
2153 if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2154 abi_ulong) != 0)
2155 goto do_sigsegv;
2156 if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2157 abi_ulong) != 0)
2158 goto do_sigsegv;
2159 err |= __put_user(fp, &(mcp->mc_fp));
2160 err |= __put_user(i7, &(mcp->mc_i7));
2161
2162 {
2163 uint32_t *src, *dst;
2164 src = env->fpr;
2165 dst = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2166 /* XXX: check that the CPU storage is the same as user context */
2167 for (i = 0; i < 64; i++, dst++, src++)
2168 err |= __put_user(*src, dst);
2169 }
2170 err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
2171 err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
2172 err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
2173
2174 if (err)
2175 goto do_sigsegv;
2176 unlock_user_struct(ucp, ucp_addr, 1);
2177 return;
2178 do_sigsegv:
2179 unlock_user_struct(ucp, ucp_addr, 1);
2180 force_sig(SIGSEGV);
2181 }
2182 #endif
2183 #elif defined(TARGET_ABI_MIPSN64)
2184
2185 # warning signal handling not implemented
2186
2187 static void setup_frame(int sig, struct target_sigaction *ka,
2188 target_sigset_t *set, CPUState *env)
2189 {
2190 fprintf(stderr, "setup_frame: not implemented\n");
2191 }
2192
2193 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2194 target_siginfo_t *info,
2195 target_sigset_t *set, CPUState *env)
2196 {
2197 fprintf(stderr, "setup_rt_frame: not implemented\n");
2198 }
2199
2200 long do_sigreturn(CPUState *env)
2201 {
2202 fprintf(stderr, "do_sigreturn: not implemented\n");
2203 return -TARGET_ENOSYS;
2204 }
2205
2206 long do_rt_sigreturn(CPUState *env)
2207 {
2208 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2209 return -TARGET_ENOSYS;
2210 }
2211
2212 #elif defined(TARGET_ABI_MIPSN32)
2213
2214 # warning signal handling not implemented
2215
2216 static void setup_frame(int sig, struct target_sigaction *ka,
2217 target_sigset_t *set, CPUState *env)
2218 {
2219 fprintf(stderr, "setup_frame: not implemented\n");
2220 }
2221
2222 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2223 target_siginfo_t *info,
2224 target_sigset_t *set, CPUState *env)
2225 {
2226 fprintf(stderr, "setup_rt_frame: not implemented\n");
2227 }
2228
2229 long do_sigreturn(CPUState *env)
2230 {
2231 fprintf(stderr, "do_sigreturn: not implemented\n");
2232 return -TARGET_ENOSYS;
2233 }
2234
2235 long do_rt_sigreturn(CPUState *env)
2236 {
2237 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2238 return -TARGET_ENOSYS;
2239 }
2240
2241 #elif defined(TARGET_ABI_MIPSO32)
2242
2243 struct target_sigcontext {
2244 uint32_t sc_regmask; /* Unused */
2245 uint32_t sc_status;
2246 uint64_t sc_pc;
2247 uint64_t sc_regs[32];
2248 uint64_t sc_fpregs[32];
2249 uint32_t sc_ownedfp; /* Unused */
2250 uint32_t sc_fpc_csr;
2251 uint32_t sc_fpc_eir; /* Unused */
2252 uint32_t sc_used_math;
2253 uint32_t sc_dsp; /* dsp status, was sc_ssflags */
2254 uint64_t sc_mdhi;
2255 uint64_t sc_mdlo;
2256 target_ulong sc_hi1; /* Was sc_cause */
2257 target_ulong sc_lo1; /* Was sc_badvaddr */
2258 target_ulong sc_hi2; /* Was sc_sigset[4] */
2259 target_ulong sc_lo2;
2260 target_ulong sc_hi3;
2261 target_ulong sc_lo3;
2262 };
2263
2264 struct sigframe {
2265 uint32_t sf_ass[4]; /* argument save space for o32 */
2266 uint32_t sf_code[2]; /* signal trampoline */
2267 struct target_sigcontext sf_sc;
2268 target_sigset_t sf_mask;
2269 };
2270
2271 /* Install trampoline to jump back from signal handler */
2272 static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
2273 {
2274 int err;
2275
2276 /*
2277 * Set up the return code ...
2278 *
2279 * li v0, __NR__foo_sigreturn
2280 * syscall
2281 */
2282
2283 err = __put_user(0x24020000 + syscall, tramp + 0);
2284 err |= __put_user(0x0000000c , tramp + 1);
2285 /* flush_cache_sigtramp((unsigned long) tramp); */
2286 return err;
2287 }
2288
2289 static inline int
2290 setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2291 {
2292 int err = 0;
2293
2294 err |= __put_user(regs->active_tc.PC, &sc->sc_pc);
2295
2296 #define save_gp_reg(i) do { \
2297 err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
2298 } while(0)
2299 __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2);
2300 save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6);
2301 save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10);
2302 save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
2303 save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18);
2304 save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22);
2305 save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
2306 save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30);
2307 save_gp_reg(31);
2308 #undef save_gp_reg
2309
2310 err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2311 err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2312
2313 /* Not used yet, but might be useful if we ever have DSP suppport */
2314 #if 0
2315 if (cpu_has_dsp) {
2316 err |= __put_user(mfhi1(), &sc->sc_hi1);
2317 err |= __put_user(mflo1(), &sc->sc_lo1);
2318 err |= __put_user(mfhi2(), &sc->sc_hi2);
2319 err |= __put_user(mflo2(), &sc->sc_lo2);
2320 err |= __put_user(mfhi3(), &sc->sc_hi3);
2321 err |= __put_user(mflo3(), &sc->sc_lo3);
2322 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2323 }
2324 /* same with 64 bit */
2325 #ifdef CONFIG_64BIT
2326 err |= __put_user(regs->hi, &sc->sc_hi[0]);
2327 err |= __put_user(regs->lo, &sc->sc_lo[0]);
2328 if (cpu_has_dsp) {
2329 err |= __put_user(mfhi1(), &sc->sc_hi[1]);
2330 err |= __put_user(mflo1(), &sc->sc_lo[1]);
2331 err |= __put_user(mfhi2(), &sc->sc_hi[2]);
2332 err |= __put_user(mflo2(), &sc->sc_lo[2]);
2333 err |= __put_user(mfhi3(), &sc->sc_hi[3]);
2334 err |= __put_user(mflo3(), &sc->sc_lo[3]);
2335 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2336 }
2337 #endif
2338 #endif
2339
2340 #if 0
2341 err |= __put_user(!!used_math(), &sc->sc_used_math);
2342
2343 if (!used_math())
2344 goto out;
2345
2346 /*
2347 * Save FPU state to signal context. Signal handler will "inherit"
2348 * current FPU state.
2349 */
2350 preempt_disable();
2351
2352 if (!is_fpu_owner()) {
2353 own_fpu();
2354 restore_fp(current);
2355 }
2356 err |= save_fp_context(sc);
2357
2358 preempt_enable();
2359 out:
2360 #endif
2361 return err;
2362 }
2363
2364 static inline int
2365 restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2366 {
2367 int err = 0;
2368
2369 err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
2370
2371 err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2372 err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
2373
2374 #define restore_gp_reg(i) do { \
2375 err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \
2376 } while(0)
2377 restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3);
2378 restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6);
2379 restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9);
2380 restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12);
2381 restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15);
2382 restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18);
2383 restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21);
2384 restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24);
2385 restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27);
2386 restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30);
2387 restore_gp_reg(31);
2388 #undef restore_gp_reg
2389
2390 #if 0
2391 if (cpu_has_dsp) {
2392 err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
2393 err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
2394 err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
2395 err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
2396 err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
2397 err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
2398 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2399 }
2400 #ifdef CONFIG_64BIT
2401 err |= __get_user(regs->hi, &sc->sc_hi[0]);
2402 err |= __get_user(regs->lo, &sc->sc_lo[0]);
2403 if (cpu_has_dsp) {
2404 err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
2405 err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
2406 err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
2407 err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
2408 err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
2409 err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
2410 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2411 }
2412 #endif
2413
2414 err |= __get_user(used_math, &sc->sc_used_math);
2415 conditional_used_math(used_math);
2416
2417 preempt_disable();
2418
2419 if (used_math()) {
2420 /* restore fpu context if we have used it before */
2421 own_fpu();
2422 err |= restore_fp_context(sc);
2423 } else {
2424 /* signal handler may have used FPU. Give it up. */
2425 lose_fpu();
2426 }
2427
2428 preempt_enable();
2429 #endif
2430 return err;
2431 }
2432 /*
2433 * Determine which stack to use..
2434 */
2435 static inline abi_ulong
2436 get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
2437 {
2438 unsigned long sp;
2439
2440 /* Default to using normal stack */
2441 sp = regs->active_tc.gpr[29];
2442
2443 /*
2444 * FPU emulator may have it's own trampoline active just
2445 * above the user stack, 16-bytes before the next lowest
2446 * 16 byte boundary. Try to avoid trashing it.
2447 */
2448 sp -= 32;
2449
2450 /* This is the X/Open sanctioned signal stack switching. */
2451 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
2452 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2453 }
2454
2455 return (sp - frame_size) & ~7;
2456 }
2457
2458 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */
2459 static void setup_frame(int sig, struct target_sigaction * ka,
2460 target_sigset_t *set, CPUState *regs)
2461 {
2462 struct sigframe *frame;
2463 abi_ulong frame_addr;
2464 int i;
2465
2466 frame_addr = get_sigframe(ka, regs, sizeof(*frame));
2467 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2468 goto give_sigsegv;
2469
2470 install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
2471
2472 if(setup_sigcontext(regs, &frame->sf_sc))
2473 goto give_sigsegv;
2474
2475 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2476 if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
2477 goto give_sigsegv;
2478 }
2479
2480 /*
2481 * Arguments to signal handler:
2482 *
2483 * a0 = signal number
2484 * a1 = 0 (should be cause)
2485 * a2 = pointer to struct sigcontext
2486 *
2487 * $25 and PC point to the signal handler, $29 points to the
2488 * struct sigframe.
2489 */
2490 regs->active_tc.gpr[ 4] = sig;
2491 regs->active_tc.gpr[ 5] = 0;
2492 regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
2493 regs->active_tc.gpr[29] = frame_addr;
2494 regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
2495 /* The original kernel code sets CP0_EPC to the handler
2496 * since it returns to userland using eret
2497 * we cannot do this here, and we must set PC directly */
2498 regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
2499 unlock_user_struct(frame, frame_addr, 1);
2500 return;
2501
2502 give_sigsegv:
2503 unlock_user_struct(frame, frame_addr, 1);
2504 force_sig(TARGET_SIGSEGV/*, current*/);
2505 return;
2506 }
2507
2508 long do_sigreturn(CPUState *regs)
2509 {
2510 struct sigframe *frame;
2511 abi_ulong frame_addr;
2512 sigset_t blocked;
2513 target_sigset_t target_set;
2514 int i;
2515
2516 #if defined(DEBUG_SIGNAL)
2517 fprintf(stderr, "do_sigreturn\n");
2518 #endif
2519 frame_addr = regs->active_tc.gpr[29];
2520 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2521 goto badframe;
2522
2523 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2524 if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
2525 goto badframe;
2526 }
2527
2528 target_to_host_sigset_internal(&blocked, &target_set);
2529 sigprocmask(SIG_SETMASK, &blocked, NULL);
2530
2531 if (restore_sigcontext(regs, &frame->sf_sc))
2532 goto badframe;
2533
2534 #if 0
2535 /*
2536 * Don't let your children do this ...
2537 */
2538 __asm__ __volatile__(
2539 "move\t$29, %0\n\t"
2540 "j\tsyscall_exit"
2541 :/* no outputs */
2542 :"r" (&regs));
2543 /* Unreached */
2544 #endif
2545
2546 regs->active_tc.PC = regs->CP0_EPC;
2547 /* I am not sure this is right, but it seems to work
2548 * maybe a problem with nested signals ? */
2549 regs->CP0_EPC = 0;
2550 return 0;
2551
2552 badframe:
2553 force_sig(TARGET_SIGSEGV/*, current*/);
2554 return 0;
2555 }
2556
2557 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2558 target_siginfo_t *info,
2559 target_sigset_t *set, CPUState *env)
2560 {
2561 fprintf(stderr, "setup_rt_frame: not implemented\n");
2562 }
2563
2564 long do_rt_sigreturn(CPUState *env)
2565 {
2566 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2567 return -TARGET_ENOSYS;
2568 }
2569
2570 #elif defined(TARGET_SH4)
2571
2572 /*
2573 * code and data structures from linux kernel:
2574 * include/asm-sh/sigcontext.h
2575 * arch/sh/kernel/signal.c
2576 */
2577
2578 struct target_sigcontext {
2579 target_ulong oldmask;
2580
2581 /* CPU registers */
2582 target_ulong sc_gregs[16];
2583 target_ulong sc_pc;
2584 target_ulong sc_pr;
2585 target_ulong sc_sr;
2586 target_ulong sc_gbr;
2587 target_ulong sc_mach;
2588 target_ulong sc_macl;
2589
2590 /* FPU registers */
2591 target_ulong sc_fpregs[16];
2592 target_ulong sc_xfpregs[16];
2593 unsigned int sc_fpscr;
2594 unsigned int sc_fpul;
2595 unsigned int sc_ownedfp;
2596 };
2597
2598 struct target_sigframe
2599 {
2600 struct target_sigcontext sc;
2601 target_ulong extramask[TARGET_NSIG_WORDS-1];
2602 uint16_t retcode[3];
2603 };
2604
2605
2606 struct target_ucontext {
2607 target_ulong uc_flags;
2608 struct target_ucontext *uc_link;
2609 target_stack_t uc_stack;
2610 struct target_sigcontext uc_mcontext;
2611 target_sigset_t uc_sigmask; /* mask last for extensibility */
2612 };
2613
2614 struct target_rt_sigframe
2615 {
2616 struct target_siginfo info;
2617 struct target_ucontext uc;
2618 uint16_t retcode[3];
2619 };
2620
2621
2622 #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
2623 #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
2624
2625 static abi_ulong get_sigframe(struct target_sigaction *ka,
2626 unsigned long sp, size_t frame_size)
2627 {
2628 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
2629 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2630 }
2631
2632 return (sp - frame_size) & -8ul;
2633 }
2634
2635 static int setup_sigcontext(struct target_sigcontext *sc,
2636 CPUState *regs, unsigned long mask)
2637 {
2638 int err = 0;
2639
2640 #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
2641 COPY(gregs[0]); COPY(gregs[1]);
2642 COPY(gregs[2]); COPY(gregs[3]);
2643 COPY(gregs[4]); COPY(gregs[5]);
2644 COPY(gregs[6]); COPY(gregs[7]);
2645 COPY(gregs[8]); COPY(gregs[9]);
2646 COPY(gregs[10]); COPY(gregs[11]);
2647 COPY(gregs[12]); COPY(gregs[13]);
2648 COPY(gregs[14]); COPY(gregs[15]);
2649 COPY(gbr); COPY(mach);
2650 COPY(macl); COPY(pr);
2651 COPY(sr); COPY(pc);
2652 #undef COPY
2653
2654 /* todo: save FPU registers here */
2655
2656 /* non-iBCS2 extensions.. */
2657 err |= __put_user(mask, &sc->oldmask);
2658
2659 return err;
2660 }
2661
2662 static int restore_sigcontext(struct CPUState *regs,
2663 struct target_sigcontext *sc)
2664 {
2665 unsigned int err = 0;
2666
2667 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
2668 COPY(gregs[1]);
2669 COPY(gregs[2]); COPY(gregs[3]);
2670 COPY(gregs[4]); COPY(gregs[5]);
2671 COPY(gregs[6]); COPY(gregs[7]);
2672 COPY(gregs[8]); COPY(gregs[9]);
2673 COPY(gregs[10]); COPY(gregs[11]);
2674 COPY(gregs[12]); COPY(gregs[13]);
2675 COPY(gregs[14]); COPY(gregs[15]);
2676 COPY(gbr); COPY(mach);
2677 COPY(macl); COPY(pr);
2678 COPY(sr); COPY(pc);
2679 #undef COPY
2680
2681 /* todo: restore FPU registers here */
2682
2683 regs->tra = -1; /* disable syscall checks */
2684 return err;
2685 }
2686
2687 static void setup_frame(int sig, struct target_sigaction *ka,
2688 target_sigset_t *set, CPUState *regs)
2689 {
2690 struct target_sigframe *frame;
2691 abi_ulong frame_addr;
2692 int i;
2693 int err = 0;
2694 int signal;
2695
2696 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
2697 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2698 goto give_sigsegv;
2699
2700 signal = current_exec_domain_sig(sig);
2701
2702 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
2703
2704 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
2705 err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
2706 }
2707
2708 /* Set up to return from userspace. If provided, use a stub
2709 already in userspace. */
2710 if (ka->sa_flags & TARGET_SA_RESTORER) {
2711 regs->pr = (unsigned long) ka->sa_restorer;
2712 } else {
2713 /* Generate return code (system call to sigreturn) */
2714 err |= __put_user(MOVW(2), &frame->retcode[0]);
2715 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
2716 err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
2717 regs->pr = (unsigned long) frame->retcode;
2718 }
2719
2720 if (err)
2721 goto give_sigsegv;
2722
2723 /* Set up registers for signal handler */
2724 regs->gregs[15] = (unsigned long) frame;
2725 regs->gregs[4] = signal; /* Arg for signal handler */
2726 regs->gregs[5] = 0;
2727 regs->gregs[6] = (unsigned long) &frame->sc;
2728 regs->pc = (unsigned long) ka->_sa_handler;
2729
2730 unlock_user_struct(frame, frame_addr, 1);
2731 return;
2732
2733 give_sigsegv:
2734 unlock_user_struct(frame, frame_addr, 1);
2735 force_sig(SIGSEGV);
2736 }
2737
2738 static void setup_rt_frame(int sig, struct target_sigaction *ka,
2739 target_siginfo_t *info,
2740 target_sigset_t *set, CPUState *regs)
2741 {
2742 struct target_rt_sigframe *frame;
2743 abi_ulong frame_addr;
2744 int i;
2745 int err = 0;
2746 int signal;
2747
2748 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
2749 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2750 goto give_sigsegv;
2751
2752 signal = current_exec_domain_sig(sig);
2753
2754 err |= copy_siginfo_to_user(&frame->info, info);
2755
2756 /* Create the ucontext. */
2757 err |= __put_user(0, &frame->uc.uc_flags);
2758 err |= __put_user(0, (unsigned long *)&frame->uc.uc_link);
2759 err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp,
2760 &frame->uc.uc_stack.ss_sp);
2761 err |= __put_user(sas_ss_flags(regs->gregs[15]),
2762 &frame->uc.uc_stack.ss_flags);
2763 err |= __put_user(target_sigaltstack_used.ss_size,
2764 &frame->uc.uc_stack.ss_size);
2765 err |= setup_sigcontext(&frame->uc.uc_mcontext,
2766 regs, set->sig[0]);
2767 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2768 err |= __put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]);
2769 }
2770
2771 /* Set up to return from userspace. If provided, use a stub
2772 already in userspace. */
2773 if (ka->sa_flags & TARGET_SA_RESTORER) {
2774 regs->pr = (unsigned long) ka->sa_restorer;
2775 } else {
2776 /* Generate return code (system call to sigreturn) */
2777 err |= __put_user(MOVW(2), &frame->retcode[0]);
2778 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
2779 err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
2780 regs->pr = (unsigned long) frame->retcode;
2781 }
2782
2783 if (err)
2784 goto give_sigsegv;
2785
2786 /* Set up registers for signal handler */
2787 regs->gregs[15] = (unsigned long) frame;
2788 regs->gregs[4] = signal; /* Arg for signal handler */
2789 regs->gregs[5] = (unsigned long) &frame->info;
2790 regs->gregs[6] = (unsigned long) &frame->uc;
2791 regs->pc = (unsigned long) ka->_sa_handler;
2792
2793 unlock_user_struct(frame, frame_addr, 1);
2794 return;
2795
2796 give_sigsegv:
2797 unlock_user_struct(frame, frame_addr, 1);
2798 force_sig(SIGSEGV);
2799 }
2800
2801 long do_sigreturn(CPUState *regs)
2802 {
2803 struct target_sigframe *frame;
2804 abi_ulong frame_addr;
2805 sigset_t blocked;
2806 target_sigset_t target_set;
2807 int i;
2808 int err = 0;
2809
2810 #if defined(DEBUG_SIGNAL)
2811 fprintf(stderr, "do_sigreturn\n");
2812 #endif
2813 frame_addr = regs->gregs[15];
2814 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2815 goto badframe;
2816
2817 err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
2818 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2819 err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
2820 }
2821
2822 if (err)
2823 goto badframe;
2824
2825 target_to_host_sigset_internal(&blocked, &target_set);
2826 sigprocmask(SIG_SETMASK, &blocked, NULL);
2827
2828 if (restore_sigcontext(regs, &frame->sc))
2829 goto badframe;
2830
2831 unlock_user_struct(frame, frame_addr, 0);
2832 return regs->gregs[0];
2833
2834 badframe:
2835 unlock_user_struct(frame, frame_addr, 0);
2836 force_sig(TARGET_SIGSEGV);
2837 return 0;
2838 }
2839
2840 long do_rt_sigreturn(CPUState *regs)
2841 {
2842 struct target_rt_sigframe *frame;
2843 abi_ulong frame_addr;
2844 sigset_t blocked;
2845
2846 #if defined(DEBUG_SIGNAL)
2847 fprintf(stderr, "do_rt_sigreturn\n");
2848 #endif
2849 frame_addr = regs->gregs[15];
2850 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2851 goto badframe;
2852
2853 target_to_host_sigset(&blocked, &frame->uc.uc_sigmask);
2854 sigprocmask(SIG_SETMASK, &blocked, NULL);
2855
2856 if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
2857 goto badframe;
2858
2859 if (do_sigaltstack(frame_addr +
2860 offsetof(struct target_rt_sigframe, uc.uc_stack),
2861 0, get_sp_from_cpustate(regs)) == -EFAULT)
2862 goto badframe;
2863
2864 unlock_user_struct(frame, frame_addr, 0);
2865 return regs->gregs[0];
2866
2867 badframe:
2868 unlock_user_struct(frame, frame_addr, 0);
2869 force_sig(TARGET_SIGSEGV);
2870 return 0;
2871 }
2872 #elif defined(TARGET_CRIS)
2873
2874 struct target_sigcontext {
2875 struct target_pt_regs regs; /* needs to be first */
2876 uint32_t oldmask;
2877 uint32_t usp; /* usp before stacking this gunk on it */
2878 };
2879
2880 /* Signal frames. */
2881 struct target_signal_frame {
2882 struct target_sigcontext sc;
2883 uint32_t extramask[TARGET_NSIG_WORDS - 1];
2884 uint8_t retcode[8]; /* Trampoline code. */
2885 };
2886
2887 struct rt_signal_frame {
2888 struct siginfo *pinfo;
2889 void *puc;
2890 struct siginfo info;
2891 struct ucontext uc;
2892 uint8_t retcode[8]; /* Trampoline code. */
2893 };
2894
2895 static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env)
2896 {
2897 __put_user(env->regs[0], &sc->regs.r0);
2898 __put_user(env->regs[1], &sc->regs.r1);
2899 __put_user(env->regs[2], &sc->regs.r2);
2900 __put_user(env->regs[3], &sc->regs.r3);
2901 __put_user(env->regs[4], &sc->regs.r4);
2902 __put_user(env->regs[5], &sc->regs.r5);
2903 __put_user(env->regs[6], &sc->regs.r6);
2904 __put_user(env->regs[7], &sc->regs.r7);
2905 __put_user(env->regs[8], &sc->regs.r8);
2906 __put_user(env->regs[9], &sc->regs.r9);
2907 __put_user(env->regs[10], &sc->regs.r10);
2908 __put_user(env->regs[11], &sc->regs.r11);
2909 __put_user(env->regs[12], &sc->regs.r12);
2910 __put_user(env->regs[13], &sc->regs.r13);
2911 __put_user(env->regs[14], &sc->usp);
2912 __put_user(env->regs[15], &sc->regs.acr);
2913 __put_user(env->pregs[PR_MOF], &sc->regs.mof);
2914 __put_user(env->pregs[PR_SRP], &sc->regs.srp);
2915 __put_user(env->pc, &sc->regs.erp);
2916 }
2917
2918 static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env)
2919 {
2920 __get_user(env->regs[0], &sc->regs.r0);
2921 __get_user(env->regs[1], &sc->regs.r1);
2922 __get_user(env->regs[2], &sc->regs.r2);
2923 __get_user(env->regs[3], &sc->regs.r3);
2924 __get_user(env->regs[4], &sc->regs.r4);
2925 __get_user(env->regs[5], &sc->regs.r5);
2926 __get_user(env->regs[6], &sc->regs.r6);
2927 __get_user(env->regs[7], &sc->regs.r7);
2928 __get_user(env->regs[8], &sc->regs.r8);
2929 __get_user(env->regs[9], &sc->regs.r9);
2930 __get_user(env->regs[10], &sc->regs.r10);
2931 __get_user(env->regs[11], &sc->regs.r11);
2932 __get_user(env->regs[12], &sc->regs.r12);
2933 __get_user(env->regs[13], &sc->regs.r13);
2934 __get_user(env->regs[14], &sc->usp);
2935 __get_user(env->regs[15], &sc->regs.acr);
2936 __get_user(env->pregs[PR_MOF], &sc->regs.mof);
2937 __get_user(env->pregs[PR_SRP], &sc->regs.srp);
2938 __get_user(env->pc, &sc->regs.erp);
2939 }
2940
2941 static abi_ulong get_sigframe(CPUState *env, int framesize)
2942 {
2943 abi_ulong sp;
2944 /* Align the stack downwards to 4. */
2945 sp = (env->regs[R_SP] & ~3);
2946 return sp - framesize;
2947 }
2948
2949 static void setup_frame(int sig, struct target_sigaction *ka,
2950 target_sigset_t *set, CPUState *env)
2951 {
2952 struct target_signal_frame *frame;
2953 abi_ulong frame_addr;
2954 int err = 0;
2955 int i;
2956
2957 frame_addr = get_sigframe(env, sizeof *frame);
2958 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2959 goto badframe;
2960
2961 /*
2962 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
2963 * use this trampoline anymore but it sets it up for GDB.
2964 * In QEMU, using the trampoline simplifies things a bit so we use it.
2965 *
2966 * This is movu.w __NR_sigreturn, r9; break 13;
2967 */
2968 err |= __put_user(0x9c5f, frame->retcode+0);
2969 err |= __put_user(TARGET_NR_sigreturn,
2970 frame->retcode+2);
2971 err |= __put_user(0xe93d, frame->retcode+4);
2972
2973 /* Save the mask. */
2974 err |= __put_user(set->sig[0], &frame->sc.oldmask);
2975 if (err)
2976 goto badframe;
2977
2978 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2979 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
2980 goto badframe;
2981 }
2982
2983 setup_sigcontext(&frame->sc, env);
2984
2985 /* Move the stack and setup the arguments for the handler. */
2986 env->regs[R_SP] = (uint32_t) (unsigned long) frame;
2987 env->regs[10] = sig;
2988 env->pc = (unsigned long) ka->_sa_handler;
2989 /* Link SRP so the guest returns through the trampoline. */
2990 env->pregs[PR_SRP] = (uint32_t) (unsigned long) &frame->retcode[0];
2991
2992 unlock_user_struct(frame, frame_addr, 1);
2993 return;
2994 badframe:
2995 unlock_user_struct(frame, frame_addr, 1);
2996 force_sig(TARGET_SIGSEGV);
2997 }
2998
2999 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3000 target_siginfo_t *info,
3001 target_sigset_t *set, CPUState *env)
3002 {
3003 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
3004 }
3005
3006 long do_sigreturn(CPUState *env)
3007 {
3008 struct target_signal_frame *frame;
3009 abi_ulong frame_addr;
3010 target_sigset_t target_set;
3011 sigset_t set;
3012 int i;
3013
3014 frame_addr = env->regs[R_SP];
3015 /* Make sure the guest isn't playing games. */
3016 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3017 goto badframe;
3018
3019 /* Restore blocked signals */
3020 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
3021 goto badframe;
3022 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3023 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
3024 goto badframe;
3025 }
3026 target_to_host_sigset_internal(&set, &target_set);
3027 sigprocmask(SIG_SETMASK, &set, NULL);
3028
3029 restore_sigcontext(&frame->sc, env);
3030 /* Compensate for the syscall return path advancing brk. */
3031 env->pc -= 2;
3032
3033 unlock_user_struct(frame, frame_addr, 0);
3034 return env->regs[10];
3035 badframe:
3036 unlock_user_struct(frame, frame_addr, 0);
3037 force_sig(TARGET_SIGSEGV);
3038 }
3039
3040 long do_rt_sigreturn(CPUState *env)
3041 {
3042 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
3043 return -TARGET_ENOSYS;
3044 }
3045
3046 #else
3047
3048 static void setup_frame(int sig, struct target_sigaction *ka,
3049 target_sigset_t *set, CPUState *env)
3050 {
3051 fprintf(stderr, "setup_frame: not implemented\n");
3052 }
3053
3054 static void setup_rt_frame(int sig, struct target_sigaction *ka,
3055 target_siginfo_t *info,
3056 target_sigset_t *set, CPUState *env)
3057 {
3058 fprintf(stderr, "setup_rt_frame: not implemented\n");
3059 }
3060
3061 long do_sigreturn(CPUState *env)
3062 {
3063 fprintf(stderr, "do_sigreturn: not implemented\n");
3064 return -TARGET_ENOSYS;
3065 }
3066
3067 long do_rt_sigreturn(CPUState *env)
3068 {
3069 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
3070 return -TARGET_ENOSYS;
3071 }
3072
3073 #endif
3074
3075 void process_pending_signals(CPUState *cpu_env)
3076 {
3077 int sig;
3078 abi_ulong handler;
3079 sigset_t set, old_set;
3080 target_sigset_t target_old_set;
3081 struct emulated_sigtable *k;
3082 struct target_sigaction *sa;
3083 struct sigqueue *q;
3084 TaskState *ts = cpu_env->opaque;
3085
3086 if (!ts->signal_pending)
3087 return;
3088
3089 /* FIXME: This is not threadsafe. */
3090 k = ts->sigtab;
3091 for(sig = 1; sig <= TARGET_NSIG; sig++) {
3092 if (k->pending)
3093 goto handle_signal;
3094 k++;
3095 }
3096 /* if no signal is pending, just return */
3097 ts->signal_pending = 0;
3098 return;
3099
3100 handle_signal:
3101 #ifdef DEBUG_SIGNAL
3102 fprintf(stderr, "qemu: process signal %d\n", sig);
3103 #endif
3104 /* dequeue signal */
3105 q = k->first;
3106 k->first = q->next;
3107 if (!k->first)
3108 k->pending = 0;
3109
3110 sig = gdb_handlesig (cpu_env, sig);
3111 if (!sig) {
3112 fprintf (stderr, "Lost signal\n");
3113 abort();
3114 }
3115
3116 sa = &sigact_table[sig - 1];
3117 handler = sa->_sa_handler;
3118 if (handler == TARGET_SIG_DFL) {
3119 /* default handler : ignore some signal. The other are fatal */
3120 if (sig != TARGET_SIGCHLD &&
3121 sig != TARGET_SIGURG &&
3122 sig != TARGET_SIGWINCH) {
3123 force_sig(sig);
3124 }
3125 } else if (handler == TARGET_SIG_IGN) {
3126 /* ignore sig */
3127 } else if (handler == TARGET_SIG_ERR) {
3128 force_sig(sig);
3129 } else {
3130 /* compute the blocked signals during the handler execution */
3131 target_to_host_sigset(&set, &sa->sa_mask);
3132 /* SA_NODEFER indicates that the current signal should not be
3133 blocked during the handler */
3134 if (!(sa->sa_flags & TARGET_SA_NODEFER))
3135 sigaddset(&set, target_to_host_signal(sig));
3136
3137 /* block signals in the handler using Linux */
3138 sigprocmask(SIG_BLOCK, &set, &old_set);
3139 /* save the previous blocked signal state to restore it at the
3140 end of the signal execution (see do_sigreturn) */
3141 host_to_target_sigset_internal(&target_old_set, &old_set);
3142
3143 /* if the CPU is in VM86 mode, we restore the 32 bit values */
3144 #if defined(TARGET_I386) && !defined(TARGET_X86_64)
3145 {
3146 CPUX86State *env = cpu_env;
3147 if (env->eflags & VM_MASK)
3148 save_v86_state(env);
3149 }
3150 #endif
3151 /* prepare the stack frame of the virtual CPU */
3152 if (sa->sa_flags & TARGET_SA_SIGINFO)
3153 setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env);
3154 else
3155 setup_frame(sig, sa, &target_old_set, cpu_env);
3156 if (sa->sa_flags & TARGET_SA_RESETHAND)
3157 sa->_sa_handler = TARGET_SIG_DFL;
3158 }
3159 if (q != &k->info)
3160 free_sigqueue(cpu_env, q);
3161 }
Samsung s3c2440 and arm920t support for the mini2440 dev board