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Fix timer rearm fallout from last qemu merge
[qemu-kvm/fedora.git] / linux-user / signal.c
blob312e41941ef335a5f6538915277fc5abd047030c
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 #define MAX_SIGQUEUE_SIZE 1024
35
36 struct sigqueue {
37 struct sigqueue *next;
38 target_siginfo_t info;
39 };
40
41 struct emulated_sigaction {
42 struct target_sigaction sa;
43 int pending; /* true if signal is pending */
44 struct sigqueue *first;
45 struct sigqueue info; /* in order to always have memory for the
46 first signal, we put it here */
47 };
48
49 struct target_sigaltstack target_sigaltstack_used = {
50 .ss_sp = 0,
51 .ss_size = 0,
52 .ss_flags = TARGET_SS_DISABLE,
53 };
54
55 static struct emulated_sigaction sigact_table[TARGET_NSIG];
56 static struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
57 static struct sigqueue *first_free; /* first free siginfo queue entry */
58 static int signal_pending; /* non zero if a signal may be pending */
59
60 static void host_signal_handler(int host_signum, siginfo_t *info,
61 void *puc);
62
63 static uint8_t host_to_target_signal_table[65] = {
64 [SIGHUP] = TARGET_SIGHUP,
65 [SIGINT] = TARGET_SIGINT,
66 [SIGQUIT] = TARGET_SIGQUIT,
67 [SIGILL] = TARGET_SIGILL,
68 [SIGTRAP] = TARGET_SIGTRAP,
69 [SIGABRT] = TARGET_SIGABRT,
70 /* [SIGIOT] = TARGET_SIGIOT,*/
71 [SIGBUS] = TARGET_SIGBUS,
72 [SIGFPE] = TARGET_SIGFPE,
73 [SIGKILL] = TARGET_SIGKILL,
74 [SIGUSR1] = TARGET_SIGUSR1,
75 [SIGSEGV] = TARGET_SIGSEGV,
76 [SIGUSR2] = TARGET_SIGUSR2,
77 [SIGPIPE] = TARGET_SIGPIPE,
78 [SIGALRM] = TARGET_SIGALRM,
79 [SIGTERM] = TARGET_SIGTERM,
80 #ifdef SIGSTKFLT
81 [SIGSTKFLT] = TARGET_SIGSTKFLT,
82 #endif
83 [SIGCHLD] = TARGET_SIGCHLD,
84 [SIGCONT] = TARGET_SIGCONT,
85 [SIGSTOP] = TARGET_SIGSTOP,
86 [SIGTSTP] = TARGET_SIGTSTP,
87 [SIGTTIN] = TARGET_SIGTTIN,
88 [SIGTTOU] = TARGET_SIGTTOU,
89 [SIGURG] = TARGET_SIGURG,
90 [SIGXCPU] = TARGET_SIGXCPU,
91 [SIGXFSZ] = TARGET_SIGXFSZ,
92 [SIGVTALRM] = TARGET_SIGVTALRM,
93 [SIGPROF] = TARGET_SIGPROF,
94 [SIGWINCH] = TARGET_SIGWINCH,
95 [SIGIO] = TARGET_SIGIO,
96 [SIGPWR] = TARGET_SIGPWR,
97 [SIGSYS] = TARGET_SIGSYS,
98 /* next signals stay the same */
99 };
100 static uint8_t target_to_host_signal_table[65];
101
102 static inline int on_sig_stack(unsigned long sp)
103 {
104 return (sp - target_sigaltstack_used.ss_sp
105 < target_sigaltstack_used.ss_size);
106 }
107
108 static inline int sas_ss_flags(unsigned long sp)
109 {
110 return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE
111 : on_sig_stack(sp) ? SS_ONSTACK : 0);
112 }
113
114 static inline int host_to_target_signal(int sig)
115 {
116 return host_to_target_signal_table[sig];
117 }
118
119 static inline int target_to_host_signal(int sig)
120 {
121 return target_to_host_signal_table[sig];
122 }
123
124 static void host_to_target_sigset_internal(target_sigset_t *d,
125 const sigset_t *s)
126 {
127 int i;
128 unsigned long sigmask;
129 uint32_t target_sigmask;
130
131 sigmask = ((unsigned long *)s)[0];
132 target_sigmask = 0;
133 for(i = 0; i < 32; i++) {
134 if (sigmask & (1 << i))
135 target_sigmask |= 1 << (host_to_target_signal(i + 1) - 1);
136 }
137 #if TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 32
138 d->sig[0] = target_sigmask;
139 for(i = 1;i < TARGET_NSIG_WORDS; i++) {
140 d->sig[i] = ((unsigned long *)s)[i];
141 }
142 #elif TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
143 d->sig[0] = target_sigmask;
144 d->sig[1] = sigmask >> 32;
145 #else
146 /* XXX: do it */
147 #endif
148 }
149
150 void host_to_target_sigset(target_sigset_t *d, const sigset_t *s)
151 {
152 target_sigset_t d1;
153 int i;
154
155 host_to_target_sigset_internal(&d1, s);
156 for(i = 0;i < TARGET_NSIG_WORDS; i++)
157 d->sig[i] = tswapl(d1.sig[i]);
158 }
159
160 void target_to_host_sigset_internal(sigset_t *d, const target_sigset_t *s)
161 {
162 int i;
163 unsigned long sigmask;
164 abi_ulong target_sigmask;
165
166 target_sigmask = s->sig[0];
167 sigmask = 0;
168 for(i = 0; i < 32; i++) {
169 if (target_sigmask & (1 << i))
170 sigmask |= 1 << (target_to_host_signal(i + 1) - 1);
171 }
172 #if TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 32
173 ((unsigned long *)d)[0] = sigmask;
174 for(i = 1;i < TARGET_NSIG_WORDS; i++) {
175 ((unsigned long *)d)[i] = s->sig[i];
176 }
177 #elif TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
178 ((unsigned long *)d)[0] = sigmask | ((unsigned long)(s->sig[1]) << 32);
179 #else
180 /* XXX: do it */
181 #endif /* TARGET_ABI_BITS */
182 }
183
184 void target_to_host_sigset(sigset_t *d, const target_sigset_t *s)
185 {
186 target_sigset_t s1;
187 int i;
188
189 for(i = 0;i < TARGET_NSIG_WORDS; i++)
190 s1.sig[i] = tswapl(s->sig[i]);
191 target_to_host_sigset_internal(d, &s1);
192 }
193
194 void host_to_target_old_sigset(abi_ulong *old_sigset,
195 const sigset_t *sigset)
196 {
197 target_sigset_t d;
198 host_to_target_sigset(&d, sigset);
199 *old_sigset = d.sig[0];
200 }
201
202 void target_to_host_old_sigset(sigset_t *sigset,
203 const abi_ulong *old_sigset)
204 {
205 target_sigset_t d;
206 int i;
207
208 d.sig[0] = *old_sigset;
209 for(i = 1;i < TARGET_NSIG_WORDS; i++)
210 d.sig[i] = 0;
211 target_to_host_sigset(sigset, &d);
212 }
213
214 /* siginfo conversion */
215
216 static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
217 const siginfo_t *info)
218 {
219 int sig;
220 sig = host_to_target_signal(info->si_signo);
221 tinfo->si_signo = sig;
222 tinfo->si_errno = 0;
223 tinfo->si_code = 0;
224 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
225 sig == SIGBUS || sig == SIGTRAP) {
226 /* should never come here, but who knows. The information for
227 the target is irrelevant */
228 tinfo->_sifields._sigfault._addr = 0;
229 } else if (sig == SIGIO) {
230 tinfo->_sifields._sigpoll._fd = info->si_fd;
231 } else if (sig >= TARGET_SIGRTMIN) {
232 tinfo->_sifields._rt._pid = info->si_pid;
233 tinfo->_sifields._rt._uid = info->si_uid;
234 /* XXX: potential problem if 64 bit */
235 tinfo->_sifields._rt._sigval.sival_ptr =
236 (abi_ulong)(unsigned long)info->si_value.sival_ptr;
237 }
238 }
239
240 static void tswap_siginfo(target_siginfo_t *tinfo,
241 const target_siginfo_t *info)
242 {
243 int sig;
244 sig = info->si_signo;
245 tinfo->si_signo = tswap32(sig);
246 tinfo->si_errno = tswap32(info->si_errno);
247 tinfo->si_code = tswap32(info->si_code);
248 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
249 sig == SIGBUS || sig == SIGTRAP) {
250 tinfo->_sifields._sigfault._addr =
251 tswapl(info->_sifields._sigfault._addr);
252 } else if (sig == SIGIO) {
253 tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
254 } else if (sig >= TARGET_SIGRTMIN) {
255 tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid);
256 tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid);
257 tinfo->_sifields._rt._sigval.sival_ptr =
258 tswapl(info->_sifields._rt._sigval.sival_ptr);
259 }
260 }
261
262
263 void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info)
264 {
265 host_to_target_siginfo_noswap(tinfo, info);
266 tswap_siginfo(tinfo, tinfo);
267 }
268
269 /* XXX: we support only POSIX RT signals are used. */
270 /* XXX: find a solution for 64 bit (additional malloced data is needed) */
271 void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo)
272 {
273 info->si_signo = tswap32(tinfo->si_signo);
274 info->si_errno = tswap32(tinfo->si_errno);
275 info->si_code = tswap32(tinfo->si_code);
276 info->si_pid = tswap32(tinfo->_sifields._rt._pid);
277 info->si_uid = tswap32(tinfo->_sifields._rt._uid);
278 info->si_value.sival_ptr =
279 (void *)(long)tswapl(tinfo->_sifields._rt._sigval.sival_ptr);
280 }
281
282 void signal_init(void)
283 {
284 struct sigaction act;
285 int i, j;
286
287 /* generate signal conversion tables */
288 for(i = 1; i <= 64; i++) {
289 if (host_to_target_signal_table[i] == 0)
290 host_to_target_signal_table[i] = i;
291 }
292 for(i = 1; i <= 64; i++) {
293 j = host_to_target_signal_table[i];
294 target_to_host_signal_table[j] = i;
295 }
296
297 /* set all host signal handlers. ALL signals are blocked during
298 the handlers to serialize them. */
299 sigfillset(&act.sa_mask);
300 act.sa_flags = SA_SIGINFO;
301 act.sa_sigaction = host_signal_handler;
302 for(i = 1; i < NSIG; i++) {
303 sigaction(i, &act, NULL);
304 }
305
306 memset(sigact_table, 0, sizeof(sigact_table));
307
308 first_free = &sigqueue_table[0];
309 for(i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++)
310 sigqueue_table[i].next = &sigqueue_table[i + 1];
311 sigqueue_table[MAX_SIGQUEUE_SIZE - 1].next = NULL;
312 }
313
314 /* signal queue handling */
315
316 static inline struct sigqueue *alloc_sigqueue(void)
317 {
318 struct sigqueue *q = first_free;
319 if (!q)
320 return NULL;
321 first_free = q->next;
322 return q;
323 }
324
325 static inline void free_sigqueue(struct sigqueue *q)
326 {
327 q->next = first_free;
328 first_free = q;
329 }
330
331 /* abort execution with signal */
332 void __attribute((noreturn)) force_sig(int sig)
333 {
334 int host_sig;
335 host_sig = target_to_host_signal(sig);
336 fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
337 sig, strsignal(host_sig));
338 #if 1
339 _exit(-host_sig);
340 #else
341 {
342 struct sigaction act;
343 sigemptyset(&act.sa_mask);
344 act.sa_flags = SA_SIGINFO;
345 act.sa_sigaction = SIG_DFL;
346 sigaction(SIGABRT, &act, NULL);
347 abort();
348 }
349 #endif
350 }
351
352 /* queue a signal so that it will be send to the virtual CPU as soon
353 as possible */
354 int queue_signal(int sig, target_siginfo_t *info)
355 {
356 struct emulated_sigaction *k;
357 struct sigqueue *q, **pq;
358 abi_ulong handler;
359
360 #if defined(DEBUG_SIGNAL)
361 fprintf(stderr, "queue_signal: sig=%d\n",
362 sig);
363 #endif
364 k = &sigact_table[sig - 1];
365 handler = k->sa._sa_handler;
366 if (handler == TARGET_SIG_DFL) {
367 /* default handler : ignore some signal. The other are fatal */
368 if (sig != TARGET_SIGCHLD &&
369 sig != TARGET_SIGURG &&
370 sig != TARGET_SIGWINCH) {
371 force_sig(sig);
372 } else {
373 return 0; /* indicate ignored */
374 }
375 } else if (handler == TARGET_SIG_IGN) {
376 /* ignore signal */
377 return 0;
378 } else if (handler == TARGET_SIG_ERR) {
379 force_sig(sig);
380 } else {
381 pq = &k->first;
382 if (sig < TARGET_SIGRTMIN) {
383 /* if non real time signal, we queue exactly one signal */
384 if (!k->pending)
385 q = &k->info;
386 else
387 return 0;
388 } else {
389 if (!k->pending) {
390 /* first signal */
391 q = &k->info;
392 } else {
393 q = alloc_sigqueue();
394 if (!q)
395 return -EAGAIN;
396 while (*pq != NULL)
397 pq = &(*pq)->next;
398 }
399 }
400 *pq = q;
401 q->info = *info;
402 q->next = NULL;
403 k->pending = 1;
404 /* signal that a new signal is pending */
405 signal_pending = 1;
406 return 1; /* indicates that the signal was queued */
407 }
408 }
409
410 static void host_signal_handler(int host_signum, siginfo_t *info,
411 void *puc)
412 {
413 int sig;
414 target_siginfo_t tinfo;
415
416 /* the CPU emulator uses some host signals to detect exceptions,
417 we we forward to it some signals */
418 if (host_signum == SIGSEGV || host_signum == SIGBUS) {
419 if (cpu_signal_handler(host_signum, info, puc))
420 return;
421 }
422
423 /* get target signal number */
424 sig = host_to_target_signal(host_signum);
425 if (sig < 1 || sig > TARGET_NSIG)
426 return;
427 #if defined(DEBUG_SIGNAL)
428 fprintf(stderr, "qemu: got signal %d\n", sig);
429 #endif
430 host_to_target_siginfo_noswap(&tinfo, info);
431 if (queue_signal(sig, &tinfo) == 1) {
432 /* interrupt the virtual CPU as soon as possible */
433 cpu_interrupt(global_env, CPU_INTERRUPT_EXIT);
434 }
435 }
436
437 /* do_sigaltstack() returns target values and errnos. */
438 /* compare linux/kernel/signal.c:do_sigaltstack() */
439 abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
440 {
441 int ret;
442 struct target_sigaltstack oss;
443
444 /* XXX: test errors */
445 if(uoss_addr)
446 {
447 __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
448 __put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
449 __put_user(sas_ss_flags(sp), &oss.ss_flags);
450 }
451
452 if(uss_addr)
453 {
454 struct target_sigaltstack *uss;
455 struct target_sigaltstack ss;
456
457 ret = -TARGET_EFAULT;
458 if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)
459 || __get_user(ss.ss_sp, &uss->ss_sp)
460 || __get_user(ss.ss_size, &uss->ss_size)
461 || __get_user(ss.ss_flags, &uss->ss_flags))
462 goto out;
463 unlock_user_struct(uss, uss_addr, 0);
464
465 ret = -TARGET_EPERM;
466 if (on_sig_stack(sp))
467 goto out;
468
469 ret = -TARGET_EINVAL;
470 if (ss.ss_flags != TARGET_SS_DISABLE
471 && ss.ss_flags != TARGET_SS_ONSTACK
472 && ss.ss_flags != 0)
473 goto out;
474
475 if (ss.ss_flags == TARGET_SS_DISABLE) {
476 ss.ss_size = 0;
477 ss.ss_sp = 0;
478 } else {
479 ret = -TARGET_ENOMEM;
480 if (ss.ss_size < MINSIGSTKSZ)
481 goto out;
482 }
483
484 target_sigaltstack_used.ss_sp = ss.ss_sp;
485 target_sigaltstack_used.ss_size = ss.ss_size;
486 }
487
488 if (uoss_addr) {
489 ret = -TARGET_EFAULT;
490 if (copy_to_user(uoss_addr, &oss, sizeof(oss)))
491 goto out;
492 }
493
494 ret = 0;
495 out:
496 return ret;
497 }
498
499 /* do_sigaction() return host values and errnos */
500 int do_sigaction(int sig, const struct target_sigaction *act,
501 struct target_sigaction *oact)
502 {
503 struct emulated_sigaction *k;
504 struct sigaction act1;
505 int host_sig;
506 int ret = 0;
507
508 if (sig < 1 || sig > TARGET_NSIG || sig == SIGKILL || sig == SIGSTOP)
509 return -EINVAL;
510 k = &sigact_table[sig - 1];
511 #if defined(DEBUG_SIGNAL)
512 fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
513 sig, (int)act, (int)oact);
514 #endif
515 if (oact) {
516 oact->_sa_handler = tswapl(k->sa._sa_handler);
517 oact->sa_flags = tswapl(k->sa.sa_flags);
518 #if !defined(TARGET_MIPS)
519 oact->sa_restorer = tswapl(k->sa.sa_restorer);
520 #endif
521 oact->sa_mask = k->sa.sa_mask;
522 }
523 if (act) {
524 k->sa._sa_handler = tswapl(act->_sa_handler);
525 k->sa.sa_flags = tswapl(act->sa_flags);
526 #if !defined(TARGET_MIPS)
527 k->sa.sa_restorer = tswapl(act->sa_restorer);
528 #endif
529 k->sa.sa_mask = act->sa_mask;
530
531 /* we update the host linux signal state */
532 host_sig = target_to_host_signal(sig);
533 if (host_sig != SIGSEGV && host_sig != SIGBUS) {
534 sigfillset(&act1.sa_mask);
535 act1.sa_flags = SA_SIGINFO;
536 if (k->sa.sa_flags & TARGET_SA_RESTART)
537 act1.sa_flags |= SA_RESTART;
538 /* NOTE: it is important to update the host kernel signal
539 ignore state to avoid getting unexpected interrupted
540 syscalls */
541 if (k->sa._sa_handler == TARGET_SIG_IGN) {
542 act1.sa_sigaction = (void *)SIG_IGN;
543 } else if (k->sa._sa_handler == TARGET_SIG_DFL) {
544 act1.sa_sigaction = (void *)SIG_DFL;
545 } else {
546 act1.sa_sigaction = host_signal_handler;
547 }
548 ret = sigaction(host_sig, &act1, NULL);
549 }
550 }
551 return ret;
552 }
553
554 #ifndef offsetof
555 #define offsetof(type, field) ((size_t) &((type *)0)->field)
556 #endif
557
558 static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
559 const target_siginfo_t *info)
560 {
561 tswap_siginfo(tinfo, info);
562 return 0;
563 }
564
565 static inline int current_exec_domain_sig(int sig)
566 {
567 return /* current->exec_domain && current->exec_domain->signal_invmap
568 && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
569 }
570
571 #if defined(TARGET_I386) && TARGET_ABI_BITS == 32
572
573 /* from the Linux kernel */
574
575 struct target_fpreg {
576 uint16_t significand[4];
577 uint16_t exponent;
578 };
579
580 struct target_fpxreg {
581 uint16_t significand[4];
582 uint16_t exponent;
583 uint16_t padding[3];
584 };
585
586 struct target_xmmreg {
587 abi_ulong element[4];
588 };
589
590 struct target_fpstate {
591 /* Regular FPU environment */
592 abi_ulong cw;
593 abi_ulong sw;
594 abi_ulong tag;
595 abi_ulong ipoff;
596 abi_ulong cssel;
597 abi_ulong dataoff;
598 abi_ulong datasel;
599 struct target_fpreg _st[8];
600 uint16_t status;
601 uint16_t magic; /* 0xffff = regular FPU data only */
602
603 /* FXSR FPU environment */
604 abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
605 abi_ulong mxcsr;
606 abi_ulong reserved;
607 struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
608 struct target_xmmreg _xmm[8];
609 abi_ulong padding[56];
610 };
611
612 #define X86_FXSR_MAGIC 0x0000
613
614 struct target_sigcontext {
615 uint16_t gs, __gsh;
616 uint16_t fs, __fsh;
617 uint16_t es, __esh;
618 uint16_t ds, __dsh;
619 abi_ulong edi;
620 abi_ulong esi;
621 abi_ulong ebp;
622 abi_ulong esp;
623 abi_ulong ebx;
624 abi_ulong edx;
625 abi_ulong ecx;
626 abi_ulong eax;
627 abi_ulong trapno;
628 abi_ulong err;
629 abi_ulong eip;
630 uint16_t cs, __csh;
631 abi_ulong eflags;
632 abi_ulong esp_at_signal;
633 uint16_t ss, __ssh;
634 abi_ulong fpstate; /* pointer */
635 abi_ulong oldmask;
636 abi_ulong cr2;
637 };
638
639 struct target_ucontext {
640 abi_ulong tuc_flags;
641 abi_ulong tuc_link;
642 target_stack_t tuc_stack;
643 struct target_sigcontext tuc_mcontext;
644 target_sigset_t tuc_sigmask; /* mask last for extensibility */
645 };
646
647 struct sigframe
648 {
649 abi_ulong pretcode;
650 int sig;
651 struct target_sigcontext sc;
652 struct target_fpstate fpstate;
653 abi_ulong extramask[TARGET_NSIG_WORDS-1];
654 char retcode[8];
655 };
656
657 struct rt_sigframe
658 {
659 abi_ulong pretcode;
660 int sig;
661 abi_ulong pinfo;
662 abi_ulong puc;
663 struct target_siginfo info;
664 struct target_ucontext uc;
665 struct target_fpstate fpstate;
666 char retcode[8];
667 };
668
669 /*
670 * Set up a signal frame.
671 */
672
673 /* XXX: save x87 state */
674 static int
675 setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
676 CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr)
677 {
678 int err = 0;
679 uint16_t magic;
680
681 /* already locked in setup_frame() */
682 err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
683 err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
684 err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
685 err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
686 err |= __put_user(env->regs[R_EDI], &sc->edi);
687 err |= __put_user(env->regs[R_ESI], &sc->esi);
688 err |= __put_user(env->regs[R_EBP], &sc->ebp);
689 err |= __put_user(env->regs[R_ESP], &sc->esp);
690 err |= __put_user(env->regs[R_EBX], &sc->ebx);
691 err |= __put_user(env->regs[R_EDX], &sc->edx);
692 err |= __put_user(env->regs[R_ECX], &sc->ecx);
693 err |= __put_user(env->regs[R_EAX], &sc->eax);
694 err |= __put_user(env->exception_index, &sc->trapno);
695 err |= __put_user(env->error_code, &sc->err);
696 err |= __put_user(env->eip, &sc->eip);
697 err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
698 err |= __put_user(env->eflags, &sc->eflags);
699 err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
700 err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
701
702 cpu_x86_fsave(env, fpstate_addr, 1);
703 fpstate->status = fpstate->sw;
704 magic = 0xffff;
705 err |= __put_user(magic, &fpstate->magic);
706 err |= __put_user(fpstate_addr, &sc->fpstate);
707
708 /* non-iBCS2 extensions.. */
709 err |= __put_user(mask, &sc->oldmask);
710 err |= __put_user(env->cr[2], &sc->cr2);
711 return err;
712 }
713
714 /*
715 * Determine which stack to use..
716 */
717
718 static inline abi_ulong
719 get_sigframe(struct emulated_sigaction *ka, CPUX86State *env, size_t frame_size)
720 {
721 unsigned long esp;
722
723 /* Default to using normal stack */
724 esp = env->regs[R_ESP];
725 /* This is the X/Open sanctioned signal stack switching. */
726 if (ka->sa.sa_flags & TARGET_SA_ONSTACK) {
727 if (sas_ss_flags(esp) == 0)
728 esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
729 }
730
731 /* This is the legacy signal stack switching. */
732 else
733 if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
734 !(ka->sa.sa_flags & TARGET_SA_RESTORER) &&
735 ka->sa.sa_restorer) {
736 esp = (unsigned long) ka->sa.sa_restorer;
737 }
738 return (esp - frame_size) & -8ul;
739 }
740
741 /* compare linux/arch/i386/kernel/signal.c:setup_frame() */
742 static void setup_frame(int sig, struct emulated_sigaction *ka,
743 target_sigset_t *set, CPUX86State *env)
744 {
745 abi_ulong frame_addr;
746 struct sigframe *frame;
747 int i, err = 0;
748
749 frame_addr = get_sigframe(ka, env, sizeof(*frame));
750
751 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
752 goto give_sigsegv;
753
754 err |= __put_user(current_exec_domain_sig(sig),
755 &frame->sig);
756 if (err)
757 goto give_sigsegv;
758
759 setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
760 frame_addr + offsetof(struct sigframe, fpstate));
761 if (err)
762 goto give_sigsegv;
763
764 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
765 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
766 goto give_sigsegv;
767 }
768
769 /* Set up to return from userspace. If provided, use a stub
770 already in userspace. */
771 if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
772 err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
773 } else {
774 uint16_t val16;
775 abi_ulong retcode_addr;
776 retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
777 err |= __put_user(retcode_addr, &frame->pretcode);
778 /* This is popl %eax ; movl $,%eax ; int $0x80 */
779 val16 = 0xb858;
780 err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
781 err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
782 val16 = 0x80cd;
783 err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
784 }
785
786 if (err)
787 goto give_sigsegv;
788
789 /* Set up registers for signal handler */
790 env->regs[R_ESP] = frame_addr;
791 env->eip = ka->sa._sa_handler;
792
793 cpu_x86_load_seg(env, R_DS, __USER_DS);
794 cpu_x86_load_seg(env, R_ES, __USER_DS);
795 cpu_x86_load_seg(env, R_SS, __USER_DS);
796 cpu_x86_load_seg(env, R_CS, __USER_CS);
797 env->eflags &= ~TF_MASK;
798
799 unlock_user_struct(frame, frame_addr, 1);
800
801 return;
802
803 give_sigsegv:
804 unlock_user_struct(frame, frame_addr, 1);
805 if (sig == TARGET_SIGSEGV)
806 ka->sa._sa_handler = TARGET_SIG_DFL;
807 force_sig(TARGET_SIGSEGV /* , current */);
808 }
809
810 /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
811 static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
812 target_siginfo_t *info,
813 target_sigset_t *set, CPUX86State *env)
814 {
815 abi_ulong frame_addr, addr;
816 struct rt_sigframe *frame;
817 int i, err = 0;
818
819 frame_addr = get_sigframe(ka, env, sizeof(*frame));
820
821 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
822 goto give_sigsegv;
823
824 err |= __put_user(current_exec_domain_sig(sig),
825 &frame->sig);
826 addr = frame_addr + offsetof(struct rt_sigframe, info);
827 err |= __put_user(addr, &frame->pinfo);
828 addr = frame_addr + offsetof(struct rt_sigframe, uc);
829 err |= __put_user(addr, &frame->puc);
830 err |= copy_siginfo_to_user(&frame->info, info);
831 if (err)
832 goto give_sigsegv;
833
834 /* Create the ucontext. */
835 err |= __put_user(0, &frame->uc.tuc_flags);
836 err |= __put_user(0, &frame->uc.tuc_link);
837 err |= __put_user(target_sigaltstack_used.ss_sp,
838 &frame->uc.tuc_stack.ss_sp);
839 err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
840 &frame->uc.tuc_stack.ss_flags);
841 err |= __put_user(target_sigaltstack_used.ss_size,
842 &frame->uc.tuc_stack.ss_size);
843 err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
844 env, set->sig[0],
845 frame_addr + offsetof(struct rt_sigframe, fpstate));
846 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
847 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
848 goto give_sigsegv;
849 }
850
851 /* Set up to return from userspace. If provided, use a stub
852 already in userspace. */
853 if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
854 err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
855 } else {
856 uint16_t val16;
857 addr = frame_addr + offsetof(struct rt_sigframe, retcode);
858 err |= __put_user(addr, &frame->pretcode);
859 /* This is movl $,%eax ; int $0x80 */
860 err |= __put_user(0xb8, (char *)(frame->retcode+0));
861 err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
862 val16 = 0x80cd;
863 err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
864 }
865
866 if (err)
867 goto give_sigsegv;
868
869 /* Set up registers for signal handler */
870 env->regs[R_ESP] = frame_addr;
871 env->eip = ka->sa._sa_handler;
872
873 cpu_x86_load_seg(env, R_DS, __USER_DS);
874 cpu_x86_load_seg(env, R_ES, __USER_DS);
875 cpu_x86_load_seg(env, R_SS, __USER_DS);
876 cpu_x86_load_seg(env, R_CS, __USER_CS);
877 env->eflags &= ~TF_MASK;
878
879 unlock_user_struct(frame, frame_addr, 1);
880
881 return;
882
883 give_sigsegv:
884 unlock_user_struct(frame, frame_addr, 1);
885 if (sig == TARGET_SIGSEGV)
886 ka->sa._sa_handler = TARGET_SIG_DFL;
887 force_sig(TARGET_SIGSEGV /* , current */);
888 }
889
890 static int
891 restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
892 {
893 unsigned int err = 0;
894 abi_ulong fpstate_addr;
895 unsigned int tmpflags;
896
897 cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
898 cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
899 cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
900 cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
901
902 env->regs[R_EDI] = tswapl(sc->edi);
903 env->regs[R_ESI] = tswapl(sc->esi);
904 env->regs[R_EBP] = tswapl(sc->ebp);
905 env->regs[R_ESP] = tswapl(sc->esp);
906 env->regs[R_EBX] = tswapl(sc->ebx);
907 env->regs[R_EDX] = tswapl(sc->edx);
908 env->regs[R_ECX] = tswapl(sc->ecx);
909 env->eip = tswapl(sc->eip);
910
911 cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
912 cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
913
914 tmpflags = tswapl(sc->eflags);
915 env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
916 // regs->orig_eax = -1; /* disable syscall checks */
917
918 fpstate_addr = tswapl(sc->fpstate);
919 if (fpstate_addr != 0) {
920 if (!access_ok(VERIFY_READ, fpstate_addr,
921 sizeof(struct target_fpstate)))
922 goto badframe;
923 cpu_x86_frstor(env, fpstate_addr, 1);
924 }
925
926 *peax = tswapl(sc->eax);
927 return err;
928 badframe:
929 return 1;
930 }
931
932 long do_sigreturn(CPUX86State *env)
933 {
934 struct sigframe *frame;
935 abi_ulong frame_addr = env->regs[R_ESP] - 8;
936 target_sigset_t target_set;
937 sigset_t set;
938 int eax, i;
939
940 #if defined(DEBUG_SIGNAL)
941 fprintf(stderr, "do_sigreturn\n");
942 #endif
943 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
944 goto badframe;
945 /* set blocked signals */
946 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
947 goto badframe;
948 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
949 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
950 goto badframe;
951 }
952
953 target_to_host_sigset_internal(&set, &target_set);
954 sigprocmask(SIG_SETMASK, &set, NULL);
955
956 /* restore registers */
957 if (restore_sigcontext(env, &frame->sc, &eax))
958 goto badframe;
959 unlock_user_struct(frame, frame_addr, 0);
960 return eax;
961
962 badframe:
963 unlock_user_struct(frame, frame_addr, 0);
964 force_sig(TARGET_SIGSEGV);
965 return 0;
966 }
967
968 long do_rt_sigreturn(CPUX86State *env)
969 {
970 abi_ulong frame_addr;
971 struct rt_sigframe *frame;
972 sigset_t set;
973 int eax;
974
975 frame_addr = env->regs[R_ESP] - 4;
976 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
977 goto badframe;
978 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
979 sigprocmask(SIG_SETMASK, &set, NULL);
980
981 if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
982 goto badframe;
983
984 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
985 get_sp_from_cpustate(env)) == -EFAULT)
986 goto badframe;
987
988 unlock_user_struct(frame, frame_addr, 0);
989 return eax;
990
991 badframe:
992 unlock_user_struct(frame, frame_addr, 0);
993 force_sig(TARGET_SIGSEGV);
994 return 0;
995 }
996
997 #elif defined(TARGET_ARM)
998
999 struct target_sigcontext {
1000 abi_ulong trap_no;
1001 abi_ulong error_code;
1002 abi_ulong oldmask;
1003 abi_ulong arm_r0;
1004 abi_ulong arm_r1;
1005 abi_ulong arm_r2;
1006 abi_ulong arm_r3;
1007 abi_ulong arm_r4;
1008 abi_ulong arm_r5;
1009 abi_ulong arm_r6;
1010 abi_ulong arm_r7;
1011 abi_ulong arm_r8;
1012 abi_ulong arm_r9;
1013 abi_ulong arm_r10;
1014 abi_ulong arm_fp;
1015 abi_ulong arm_ip;
1016 abi_ulong arm_sp;
1017 abi_ulong arm_lr;
1018 abi_ulong arm_pc;
1019 abi_ulong arm_cpsr;
1020 abi_ulong fault_address;
1021 };
1022
1023 struct target_ucontext {
1024 abi_ulong tuc_flags;
1025 abi_ulong tuc_link;
1026 target_stack_t tuc_stack;
1027 struct target_sigcontext tuc_mcontext;
1028 target_sigset_t tuc_sigmask; /* mask last for extensibility */
1029 };
1030
1031 struct sigframe
1032 {
1033 struct target_sigcontext sc;
1034 abi_ulong extramask[TARGET_NSIG_WORDS-1];
1035 abi_ulong retcode;
1036 };
1037
1038 struct rt_sigframe
1039 {
1040 abi_ulong pinfo;
1041 abi_ulong puc;
1042 struct target_siginfo info;
1043 struct target_ucontext uc;
1044 abi_ulong retcode;
1045 };
1046
1047 #define TARGET_CONFIG_CPU_32 1
1048
1049 /*
1050 * For ARM syscalls, we encode the syscall number into the instruction.
1051 */
1052 #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
1053 #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
1054
1055 /*
1056 * For Thumb syscalls, we pass the syscall number via r7. We therefore
1057 * need two 16-bit instructions.
1058 */
1059 #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
1060 #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
1061
1062 static const abi_ulong retcodes[4] = {
1063 SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
1064 SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
1065 };
1066
1067
1068 #define __put_user_error(x,p,e) __put_user(x, p)
1069 #define __get_user_error(x,p,e) __get_user(x, p)
1070
1071 static inline int valid_user_regs(CPUState *regs)
1072 {
1073 return 1;
1074 }
1075
1076 static int
1077 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1078 CPUState *env, abi_ulong mask)
1079 {
1080 int err = 0;
1081
1082 __put_user_error(env->regs[0], &sc->arm_r0, err);
1083 __put_user_error(env->regs[1], &sc->arm_r1, err);
1084 __put_user_error(env->regs[2], &sc->arm_r2, err);
1085 __put_user_error(env->regs[3], &sc->arm_r3, err);
1086 __put_user_error(env->regs[4], &sc->arm_r4, err);
1087 __put_user_error(env->regs[5], &sc->arm_r5, err);
1088 __put_user_error(env->regs[6], &sc->arm_r6, err);
1089 __put_user_error(env->regs[7], &sc->arm_r7, err);
1090 __put_user_error(env->regs[8], &sc->arm_r8, err);
1091 __put_user_error(env->regs[9], &sc->arm_r9, err);
1092 __put_user_error(env->regs[10], &sc->arm_r10, err);
1093 __put_user_error(env->regs[11], &sc->arm_fp, err);
1094 __put_user_error(env->regs[12], &sc->arm_ip, err);
1095 __put_user_error(env->regs[13], &sc->arm_sp, err);
1096 __put_user_error(env->regs[14], &sc->arm_lr, err);
1097 __put_user_error(env->regs[15], &sc->arm_pc, err);
1098 #ifdef TARGET_CONFIG_CPU_32
1099 __put_user_error(cpsr_read(env), &sc->arm_cpsr, err);
1100 #endif
1101
1102 __put_user_error(/* current->thread.trap_no */ 0, &sc->trap_no, err);
1103 __put_user_error(/* current->thread.error_code */ 0, &sc->error_code, err);
1104 __put_user_error(/* current->thread.address */ 0, &sc->fault_address, err);
1105 __put_user_error(mask, &sc->oldmask, err);
1106
1107 return err;
1108 }
1109
1110 static inline abi_ulong
1111 get_sigframe(struct emulated_sigaction *ka, CPUState *regs, int framesize)
1112 {
1113 unsigned long sp = regs->regs[13];
1114
1115 /*
1116 * This is the X/Open sanctioned signal stack switching.
1117 */
1118 if ((ka->sa.sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
1119 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1120 /*
1121 * ATPCS B01 mandates 8-byte alignment
1122 */
1123 return (sp - framesize) & ~7;
1124 }
1125
1126 static int
1127 setup_return(CPUState *env, struct emulated_sigaction *ka,
1128 abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
1129 {
1130 abi_ulong handler = ka->sa._sa_handler;
1131 abi_ulong retcode;
1132 int thumb = 0;
1133 #if defined(TARGET_CONFIG_CPU_32)
1134 #if 0
1135 abi_ulong cpsr = env->cpsr;
1136
1137 /*
1138 * Maybe we need to deliver a 32-bit signal to a 26-bit task.
1139 */
1140 if (ka->sa.sa_flags & SA_THIRTYTWO)
1141 cpsr = (cpsr & ~MODE_MASK) | USR_MODE;
1142
1143 #ifdef CONFIG_ARM_THUMB
1144 if (elf_hwcap & HWCAP_THUMB) {
1145 /*
1146 * The LSB of the handler determines if we're going to
1147 * be using THUMB or ARM mode for this signal handler.
1148 */
1149 thumb = handler & 1;
1150
1151 if (thumb)
1152 cpsr |= T_BIT;
1153 else
1154 cpsr &= ~T_BIT;
1155 }
1156 #endif /* CONFIG_ARM_THUMB */
1157 #endif /* 0 */
1158 #endif /* TARGET_CONFIG_CPU_32 */
1159
1160 if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
1161 retcode = ka->sa.sa_restorer;
1162 } else {
1163 unsigned int idx = thumb;
1164
1165 if (ka->sa.sa_flags & TARGET_SA_SIGINFO)
1166 idx += 2;
1167
1168 if (__put_user(retcodes[idx], rc))
1169 return 1;
1170 #if 0
1171 flush_icache_range((abi_ulong)rc,
1172 (abi_ulong)(rc + 1));
1173 #endif
1174 retcode = rc_addr + thumb;
1175 }
1176
1177 env->regs[0] = usig;
1178 env->regs[13] = frame_addr;
1179 env->regs[14] = retcode;
1180 env->regs[15] = handler & (thumb ? ~1 : ~3);
1181
1182 #if 0
1183 #ifdef TARGET_CONFIG_CPU_32
1184 env->cpsr = cpsr;
1185 #endif
1186 #endif
1187
1188 return 0;
1189 }
1190
1191 /* compare linux/arch/arm/kernel/signal.c:setup_frame() */
1192 static void setup_frame(int usig, struct emulated_sigaction *ka,
1193 target_sigset_t *set, CPUState *regs)
1194 {
1195 struct sigframe *frame;
1196 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1197 int i, err = 0;
1198
1199 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1200 return;
1201
1202 err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]);
1203
1204 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1205 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
1206 goto end;
1207 }
1208
1209 if (err == 0)
1210 err = setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1211 frame_addr + offsetof(struct sigframe, retcode));
1212
1213 end:
1214 unlock_user_struct(frame, frame_addr, 1);
1215 // return err;
1216 }
1217
1218 /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
1219 static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
1220 target_siginfo_t *info,
1221 target_sigset_t *set, CPUState *env)
1222 {
1223 struct rt_sigframe *frame;
1224 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1225 struct target_sigaltstack stack;
1226 int i, err = 0;
1227 abi_ulong info_addr, uc_addr;
1228
1229 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1230 return /* 1 */;
1231
1232 info_addr = frame_addr + offsetof(struct rt_sigframe, info);
1233 __put_user_error(info_addr, &frame->pinfo, err);
1234 uc_addr = frame_addr + offsetof(struct rt_sigframe, uc);
1235 __put_user_error(uc_addr, &frame->puc, err);
1236 err |= copy_siginfo_to_user(&frame->info, info);
1237
1238 /* Clear all the bits of the ucontext we don't use. */
1239 memset(&frame->uc, 0, offsetof(struct target_ucontext, tuc_mcontext));
1240
1241 memset(&stack, 0, sizeof(stack));
1242 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1243 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1244 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1245 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
1246
1247 err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
1248 env, set->sig[0]);
1249 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1250 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
1251 goto end;
1252 }
1253
1254 if (err == 0)
1255 err = setup_return(env, ka, &frame->retcode, frame_addr, usig,
1256 frame_addr + offsetof(struct rt_sigframe, retcode));
1257
1258 if (err == 0) {
1259 /*
1260 * For realtime signals we must also set the second and third
1261 * arguments for the signal handler.
1262 * -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
1263 */
1264 env->regs[1] = info_addr;
1265 env->regs[2] = uc_addr;
1266 }
1267
1268 end:
1269 unlock_user_struct(frame, frame_addr, 1);
1270
1271 // return err;
1272 }
1273
1274 static int
1275 restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
1276 {
1277 int err = 0;
1278 uint32_t cpsr;
1279
1280 __get_user_error(env->regs[0], &sc->arm_r0, err);
1281 __get_user_error(env->regs[1], &sc->arm_r1, err);
1282 __get_user_error(env->regs[2], &sc->arm_r2, err);
1283 __get_user_error(env->regs[3], &sc->arm_r3, err);
1284 __get_user_error(env->regs[4], &sc->arm_r4, err);
1285 __get_user_error(env->regs[5], &sc->arm_r5, err);
1286 __get_user_error(env->regs[6], &sc->arm_r6, err);
1287 __get_user_error(env->regs[7], &sc->arm_r7, err);
1288 __get_user_error(env->regs[8], &sc->arm_r8, err);
1289 __get_user_error(env->regs[9], &sc->arm_r9, err);
1290 __get_user_error(env->regs[10], &sc->arm_r10, err);
1291 __get_user_error(env->regs[11], &sc->arm_fp, err);
1292 __get_user_error(env->regs[12], &sc->arm_ip, err);
1293 __get_user_error(env->regs[13], &sc->arm_sp, err);
1294 __get_user_error(env->regs[14], &sc->arm_lr, err);
1295 __get_user_error(env->regs[15], &sc->arm_pc, err);
1296 #ifdef TARGET_CONFIG_CPU_32
1297 __get_user_error(cpsr, &sc->arm_cpsr, err);
1298 cpsr_write(env, cpsr, 0xffffffff);
1299 #endif
1300
1301 err |= !valid_user_regs(env);
1302
1303 return err;
1304 }
1305
1306 long do_sigreturn(CPUState *env)
1307 {
1308 abi_ulong frame_addr;
1309 struct sigframe *frame;
1310 target_sigset_t set;
1311 sigset_t host_set;
1312 int i;
1313
1314 /*
1315 * Since we stacked the signal on a 64-bit boundary,
1316 * then 'sp' should be word aligned here. If it's
1317 * not, then the user is trying to mess with us.
1318 */
1319 if (env->regs[13] & 7)
1320 goto badframe;
1321
1322 frame_addr = env->regs[13];
1323 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1324 goto badframe;
1325
1326 if (__get_user(set.sig[0], &frame->sc.oldmask))
1327 goto badframe;
1328 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1329 if (__get_user(set.sig[i], &frame->extramask[i - 1]))
1330 goto badframe;
1331 }
1332
1333 target_to_host_sigset_internal(&host_set, &set);
1334 sigprocmask(SIG_SETMASK, &host_set, NULL);
1335
1336 if (restore_sigcontext(env, &frame->sc))
1337 goto badframe;
1338
1339 #if 0
1340 /* Send SIGTRAP if we're single-stepping */
1341 if (ptrace_cancel_bpt(current))
1342 send_sig(SIGTRAP, current, 1);
1343 #endif
1344 unlock_user_struct(frame, frame_addr, 0);
1345 return env->regs[0];
1346
1347 badframe:
1348 unlock_user_struct(frame, frame_addr, 0);
1349 force_sig(SIGSEGV /* , current */);
1350 return 0;
1351 }
1352
1353 long do_rt_sigreturn(CPUState *env)
1354 {
1355 abi_ulong frame_addr;
1356 struct rt_sigframe *frame;
1357 sigset_t host_set;
1358
1359 /*
1360 * Since we stacked the signal on a 64-bit boundary,
1361 * then 'sp' should be word aligned here. If it's
1362 * not, then the user is trying to mess with us.
1363 */
1364 if (env->regs[13] & 7)
1365 goto badframe;
1366
1367 frame_addr = env->regs[13];
1368 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1369 goto badframe;
1370
1371 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
1372 sigprocmask(SIG_SETMASK, &host_set, NULL);
1373
1374 if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
1375 goto badframe;
1376
1377 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
1378 goto badframe;
1379
1380 #if 0
1381 /* Send SIGTRAP if we're single-stepping */
1382 if (ptrace_cancel_bpt(current))
1383 send_sig(SIGTRAP, current, 1);
1384 #endif
1385 unlock_user_struct(frame, frame_addr, 0);
1386 return env->regs[0];
1387
1388 badframe:
1389 unlock_user_struct(frame, frame_addr, 0);
1390 force_sig(SIGSEGV /* , current */);
1391 return 0;
1392 }
1393
1394 #elif defined(TARGET_SPARC)
1395
1396 #define __SUNOS_MAXWIN 31
1397
1398 /* This is what SunOS does, so shall I. */
1399 struct target_sigcontext {
1400 abi_ulong sigc_onstack; /* state to restore */
1401
1402 abi_ulong sigc_mask; /* sigmask to restore */
1403 abi_ulong sigc_sp; /* stack pointer */
1404 abi_ulong sigc_pc; /* program counter */
1405 abi_ulong sigc_npc; /* next program counter */
1406 abi_ulong sigc_psr; /* for condition codes etc */
1407 abi_ulong sigc_g1; /* User uses these two registers */
1408 abi_ulong sigc_o0; /* within the trampoline code. */
1409
1410 /* Now comes information regarding the users window set
1411 * at the time of the signal.
1412 */
1413 abi_ulong sigc_oswins; /* outstanding windows */
1414
1415 /* stack ptrs for each regwin buf */
1416 char *sigc_spbuf[__SUNOS_MAXWIN];
1417
1418 /* Windows to restore after signal */
1419 struct {
1420 abi_ulong locals[8];
1421 abi_ulong ins[8];
1422 } sigc_wbuf[__SUNOS_MAXWIN];
1423 };
1424 /* A Sparc stack frame */
1425 struct sparc_stackf {
1426 abi_ulong locals[8];
1427 abi_ulong ins[6];
1428 struct sparc_stackf *fp;
1429 abi_ulong callers_pc;
1430 char *structptr;
1431 abi_ulong xargs[6];
1432 abi_ulong xxargs[1];
1433 };
1434
1435 typedef struct {
1436 struct {
1437 abi_ulong psr;
1438 abi_ulong pc;
1439 abi_ulong npc;
1440 abi_ulong y;
1441 abi_ulong u_regs[16]; /* globals and ins */
1442 } si_regs;
1443 int si_mask;
1444 } __siginfo_t;
1445
1446 typedef struct {
1447 unsigned long si_float_regs [32];
1448 unsigned long si_fsr;
1449 unsigned long si_fpqdepth;
1450 struct {
1451 unsigned long *insn_addr;
1452 unsigned long insn;
1453 } si_fpqueue [16];
1454 } qemu_siginfo_fpu_t;
1455
1456
1457 struct target_signal_frame {
1458 struct sparc_stackf ss;
1459 __siginfo_t info;
1460 abi_ulong fpu_save;
1461 abi_ulong insns[2] __attribute__ ((aligned (8)));
1462 abi_ulong extramask[TARGET_NSIG_WORDS - 1];
1463 abi_ulong extra_size; /* Should be 0 */
1464 qemu_siginfo_fpu_t fpu_state;
1465 };
1466 struct target_rt_signal_frame {
1467 struct sparc_stackf ss;
1468 siginfo_t info;
1469 abi_ulong regs[20];
1470 sigset_t mask;
1471 abi_ulong fpu_save;
1472 unsigned int insns[2];
1473 stack_t stack;
1474 unsigned int extra_size; /* Should be 0 */
1475 qemu_siginfo_fpu_t fpu_state;
1476 };
1477
1478 #define UREG_O0 16
1479 #define UREG_O6 22
1480 #define UREG_I0 0
1481 #define UREG_I1 1
1482 #define UREG_I2 2
1483 #define UREG_I3 3
1484 #define UREG_I4 4
1485 #define UREG_I5 5
1486 #define UREG_I6 6
1487 #define UREG_I7 7
1488 #define UREG_L0 8
1489 #define UREG_FP UREG_I6
1490 #define UREG_SP UREG_O6
1491
1492 static inline abi_ulong get_sigframe(struct emulated_sigaction *sa,
1493 CPUState *env, unsigned long framesize)
1494 {
1495 abi_ulong sp;
1496
1497 sp = env->regwptr[UREG_FP];
1498
1499 /* This is the X/Open sanctioned signal stack switching. */
1500 if (sa->sa.sa_flags & TARGET_SA_ONSTACK) {
1501 if (!on_sig_stack(sp)
1502 && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
1503 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1504 }
1505 return sp - framesize;
1506 }
1507
1508 static int
1509 setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask)
1510 {
1511 int err = 0, i;
1512
1513 err |= __put_user(env->psr, &si->si_regs.psr);
1514 err |= __put_user(env->pc, &si->si_regs.pc);
1515 err |= __put_user(env->npc, &si->si_regs.npc);
1516 err |= __put_user(env->y, &si->si_regs.y);
1517 for (i=0; i < 8; i++) {
1518 err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
1519 }
1520 for (i=0; i < 8; i++) {
1521 err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
1522 }
1523 err |= __put_user(mask, &si->si_mask);
1524 return err;
1525 }
1526
1527 #if 0
1528 static int
1529 setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
1530 CPUState *env, unsigned long mask)
1531 {
1532 int err = 0;
1533
1534 err |= __put_user(mask, &sc->sigc_mask);
1535 err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
1536 err |= __put_user(env->pc, &sc->sigc_pc);
1537 err |= __put_user(env->npc, &sc->sigc_npc);
1538 err |= __put_user(env->psr, &sc->sigc_psr);
1539 err |= __put_user(env->gregs[1], &sc->sigc_g1);
1540 err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
1541
1542 return err;
1543 }
1544 #endif
1545 #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
1546
1547 static void setup_frame(int sig, struct emulated_sigaction *ka,
1548 target_sigset_t *set, CPUState *env)
1549 {
1550 abi_ulong sf_addr;
1551 struct target_signal_frame *sf;
1552 int sigframe_size, err, i;
1553
1554 /* 1. Make sure everything is clean */
1555 //synchronize_user_stack();
1556
1557 sigframe_size = NF_ALIGNEDSZ;
1558 sf_addr = get_sigframe(ka, env, sigframe_size);
1559
1560 sf = lock_user(VERIFY_WRITE, sf_addr,
1561 sizeof(struct target_signal_frame), 0);
1562 if (!sf)
1563 goto sigsegv;
1564
1565 //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1566 #if 0
1567 if (invalid_frame_pointer(sf, sigframe_size))
1568 goto sigill_and_return;
1569 #endif
1570 /* 2. Save the current process state */
1571 err = setup___siginfo(&sf->info, env, set->sig[0]);
1572 err |= __put_user(0, &sf->extra_size);
1573
1574 //err |= save_fpu_state(regs, &sf->fpu_state);
1575 //err |= __put_user(&sf->fpu_state, &sf->fpu_save);
1576
1577 err |= __put_user(set->sig[0], &sf->info.si_mask);
1578 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
1579 err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
1580 }
1581
1582 for (i = 0; i < 8; i++) {
1583 err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
1584 }
1585 for (i = 0; i < 8; i++) {
1586 err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
1587 }
1588 if (err)
1589 goto sigsegv;
1590
1591 /* 3. signal handler back-trampoline and parameters */
1592 env->regwptr[UREG_FP] = sf_addr;
1593 env->regwptr[UREG_I0] = sig;
1594 env->regwptr[UREG_I1] = sf_addr +
1595 offsetof(struct target_signal_frame, info);
1596 env->regwptr[UREG_I2] = sf_addr +
1597 offsetof(struct target_signal_frame, info);
1598
1599 /* 4. signal handler */
1600 env->pc = ka->sa._sa_handler;
1601 env->npc = (env->pc + 4);
1602 /* 5. return to kernel instructions */
1603 if (ka->sa.sa_restorer)
1604 env->regwptr[UREG_I7] = ka->sa.sa_restorer;
1605 else {
1606 uint32_t val32;
1607
1608 env->regwptr[UREG_I7] = sf_addr +
1609 offsetof(struct target_signal_frame, insns) - 2 * 4;
1610
1611 /* mov __NR_sigreturn, %g1 */
1612 val32 = 0x821020d8;
1613 err |= __put_user(val32, &sf->insns[0]);
1614
1615 /* t 0x10 */
1616 val32 = 0x91d02010;
1617 err |= __put_user(val32, &sf->insns[1]);
1618 if (err)
1619 goto sigsegv;
1620
1621 /* Flush instruction space. */
1622 //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
1623 // tb_flush(env);
1624 }
1625 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
1626 return;
1627 #if 0
1628 sigill_and_return:
1629 force_sig(TARGET_SIGILL);
1630 #endif
1631 sigsegv:
1632 //fprintf(stderr, "force_sig\n");
1633 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
1634 force_sig(TARGET_SIGSEGV);
1635 }
1636 static inline int
1637 restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu)
1638 {
1639 int err;
1640 #if 0
1641 #ifdef CONFIG_SMP
1642 if (current->flags & PF_USEDFPU)
1643 regs->psr &= ~PSR_EF;
1644 #else
1645 if (current == last_task_used_math) {
1646 last_task_used_math = 0;
1647 regs->psr &= ~PSR_EF;
1648 }
1649 #endif
1650 current->used_math = 1;
1651 current->flags &= ~PF_USEDFPU;
1652 #endif
1653 #if 0
1654 if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
1655 return -EFAULT;
1656 #endif
1657
1658 #if 0
1659 /* XXX: incorrect */
1660 err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
1661 (sizeof(unsigned long) * 32));
1662 #endif
1663 err |= __get_user(env->fsr, &fpu->si_fsr);
1664 #if 0
1665 err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
1666 if (current->thread.fpqdepth != 0)
1667 err |= __copy_from_user(&current->thread.fpqueue[0],
1668 &fpu->si_fpqueue[0],
1669 ((sizeof(unsigned long) +
1670 (sizeof(unsigned long *)))*16));
1671 #endif
1672 return err;
1673 }
1674
1675
1676 static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
1677 target_siginfo_t *info,
1678 target_sigset_t *set, CPUState *env)
1679 {
1680 fprintf(stderr, "setup_rt_frame: not implemented\n");
1681 }
1682
1683 long do_sigreturn(CPUState *env)
1684 {
1685 abi_ulong sf_addr;
1686 struct target_signal_frame *sf;
1687 uint32_t up_psr, pc, npc;
1688 target_sigset_t set;
1689 sigset_t host_set;
1690 abi_ulong fpu_save_addr;
1691 int err, i;
1692
1693 sf_addr = env->regwptr[UREG_FP];
1694 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1))
1695 goto segv_and_exit;
1696 #if 0
1697 fprintf(stderr, "sigreturn\n");
1698 fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
1699 #endif
1700 //cpu_dump_state(env, stderr, fprintf, 0);
1701
1702 /* 1. Make sure we are not getting garbage from the user */
1703
1704 if (sf_addr & 3)
1705 goto segv_and_exit;
1706
1707 err = __get_user(pc, &sf->info.si_regs.pc);
1708 err |= __get_user(npc, &sf->info.si_regs.npc);
1709
1710 if ((pc | npc) & 3)
1711 goto segv_and_exit;
1712
1713 /* 2. Restore the state */
1714 err |= __get_user(up_psr, &sf->info.si_regs.psr);
1715
1716 /* User can only change condition codes and FPU enabling in %psr. */
1717 env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
1718 | (env->psr & ~(PSR_ICC /* | PSR_EF */));
1719
1720 env->pc = pc;
1721 env->npc = npc;
1722 err |= __get_user(env->y, &sf->info.si_regs.y);
1723 for (i=0; i < 8; i++) {
1724 err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
1725 }
1726 for (i=0; i < 8; i++) {
1727 err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
1728 }
1729
1730 err |= __get_user(fpu_save_addr, &sf->fpu_save);
1731
1732 //if (fpu_save)
1733 // err |= restore_fpu_state(env, fpu_save);
1734
1735 /* This is pretty much atomic, no amount locking would prevent
1736 * the races which exist anyways.
1737 */
1738 err |= __get_user(set.sig[0], &sf->info.si_mask);
1739 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1740 err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
1741 }
1742
1743 target_to_host_sigset_internal(&host_set, &set);
1744 sigprocmask(SIG_SETMASK, &host_set, NULL);
1745
1746 if (err)
1747 goto segv_and_exit;
1748 unlock_user_struct(sf, sf_addr, 0);
1749 return env->regwptr[0];
1750
1751 segv_and_exit:
1752 unlock_user_struct(sf, sf_addr, 0);
1753 force_sig(TARGET_SIGSEGV);
1754 }
1755
1756 long do_rt_sigreturn(CPUState *env)
1757 {
1758 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
1759 return -TARGET_ENOSYS;
1760 }
1761
1762 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
1763 #define MC_TSTATE 0
1764 #define MC_PC 1
1765 #define MC_NPC 2
1766 #define MC_Y 3
1767 #define MC_G1 4
1768 #define MC_G2 5
1769 #define MC_G3 6
1770 #define MC_G4 7
1771 #define MC_G5 8
1772 #define MC_G6 9
1773 #define MC_G7 10
1774 #define MC_O0 11
1775 #define MC_O1 12
1776 #define MC_O2 13
1777 #define MC_O3 14
1778 #define MC_O4 15
1779 #define MC_O5 16
1780 #define MC_O6 17
1781 #define MC_O7 18
1782 #define MC_NGREG 19
1783
1784 typedef abi_ulong target_mc_greg_t;
1785 typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
1786
1787 struct target_mc_fq {
1788 abi_ulong *mcfq_addr;
1789 uint32_t mcfq_insn;
1790 };
1791
1792 struct target_mc_fpu {
1793 union {
1794 uint32_t sregs[32];
1795 uint64_t dregs[32];
1796 //uint128_t qregs[16];
1797 } mcfpu_fregs;
1798 abi_ulong mcfpu_fsr;
1799 abi_ulong mcfpu_fprs;
1800 abi_ulong mcfpu_gsr;
1801 struct target_mc_fq *mcfpu_fq;
1802 unsigned char mcfpu_qcnt;
1803 unsigned char mcfpu_qentsz;
1804 unsigned char mcfpu_enab;
1805 };
1806 typedef struct target_mc_fpu target_mc_fpu_t;
1807
1808 typedef struct {
1809 target_mc_gregset_t mc_gregs;
1810 target_mc_greg_t mc_fp;
1811 target_mc_greg_t mc_i7;
1812 target_mc_fpu_t mc_fpregs;
1813 } target_mcontext_t;
1814
1815 struct target_ucontext {
1816 struct target_ucontext *uc_link;
1817 abi_ulong uc_flags;
1818 target_sigset_t uc_sigmask;
1819 target_mcontext_t uc_mcontext;
1820 };
1821
1822 /* A V9 register window */
1823 struct target_reg_window {
1824 abi_ulong locals[8];
1825 abi_ulong ins[8];
1826 };
1827
1828 #define TARGET_STACK_BIAS 2047
1829
1830 /* {set, get}context() needed for 64-bit SparcLinux userland. */
1831 void sparc64_set_context(CPUSPARCState *env)
1832 {
1833 abi_ulong ucp_addr;
1834 struct target_ucontext *ucp;
1835 target_mc_gregset_t *grp;
1836 abi_ulong pc, npc, tstate;
1837 abi_ulong fp, i7, w_addr;
1838 unsigned char fenab;
1839 int err;
1840 unsigned int i;
1841
1842 ucp_addr = env->regwptr[UREG_I0];
1843 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1))
1844 goto do_sigsegv;
1845 grp = &ucp->uc_mcontext.mc_gregs;
1846 err = __get_user(pc, &((*grp)[MC_PC]));
1847 err |= __get_user(npc, &((*grp)[MC_NPC]));
1848 if (err || ((pc | npc) & 3))
1849 goto do_sigsegv;
1850 if (env->regwptr[UREG_I1]) {
1851 target_sigset_t target_set;
1852 sigset_t set;
1853
1854 if (TARGET_NSIG_WORDS == 1) {
1855 if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0]))
1856 goto do_sigsegv;
1857 } else {
1858 abi_ulong *src, *dst;
1859 src = ucp->uc_sigmask.sig;
1860 dst = target_set.sig;
1861 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
1862 i++, dst++, src++)
1863 err |= __get_user(*dst, src);
1864 if (err)
1865 goto do_sigsegv;
1866 }
1867 target_to_host_sigset_internal(&set, &target_set);
1868 sigprocmask(SIG_SETMASK, &set, NULL);
1869 }
1870 env->pc = pc;
1871 env->npc = npc;
1872 err |= __get_user(env->y, &((*grp)[MC_Y]));
1873 err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
1874 env->asi = (tstate >> 24) & 0xff;
1875 PUT_CCR(env, tstate >> 32);
1876 PUT_CWP64(env, tstate & 0x1f);
1877 err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
1878 err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
1879 err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
1880 err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
1881 err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
1882 err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
1883 err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
1884 err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
1885 err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
1886 err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
1887 err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
1888 err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
1889 err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
1890 err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
1891 err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
1892
1893 err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp));
1894 err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7));
1895
1896 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
1897 if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
1898 abi_ulong) != 0)
1899 goto do_sigsegv;
1900 if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
1901 abi_ulong) != 0)
1902 goto do_sigsegv;
1903 err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab));
1904 err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs));
1905 {
1906 uint32_t *src, *dst;
1907 src = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
1908 dst = env->fpr;
1909 /* XXX: check that the CPU storage is the same as user context */
1910 for (i = 0; i < 64; i++, dst++, src++)
1911 err |= __get_user(*dst, src);
1912 }
1913 err |= __get_user(env->fsr,
1914 &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr));
1915 err |= __get_user(env->gsr,
1916 &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr));
1917 if (err)
1918 goto do_sigsegv;
1919 unlock_user_struct(ucp, ucp_addr, 0);
1920 return;
1921 do_sigsegv:
1922 unlock_user_struct(ucp, ucp_addr, 0);
1923 force_sig(SIGSEGV);
1924 }
1925
1926 void sparc64_get_context(CPUSPARCState *env)
1927 {
1928 abi_ulong ucp_addr;
1929 struct target_ucontext *ucp;
1930 target_mc_gregset_t *grp;
1931 target_mcontext_t *mcp;
1932 abi_ulong fp, i7, w_addr;
1933 int err;
1934 unsigned int i;
1935 target_sigset_t target_set;
1936 sigset_t set;
1937
1938 ucp_addr = env->regwptr[UREG_I0];
1939 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0))
1940 goto do_sigsegv;
1941
1942 mcp = &ucp->uc_mcontext;
1943 grp = &mcp->mc_gregs;
1944
1945 /* Skip over the trap instruction, first. */
1946 env->pc = env->npc;
1947 env->npc += 4;
1948
1949 err = 0;
1950
1951 sigprocmask(0, NULL, &set);
1952 host_to_target_sigset_internal(&target_set, &set);
1953 if (TARGET_NSIG_WORDS == 1) {
1954 err |= __put_user(target_set.sig[0],
1955 (abi_ulong *)&ucp->uc_sigmask);
1956 } else {
1957 abi_ulong *src, *dst;
1958 src = target_set.sig;
1959 dst = ucp->uc_sigmask.sig;
1960 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
1961 i++, dst++, src++)
1962 err |= __put_user(*src, dst);
1963 if (err)
1964 goto do_sigsegv;
1965 }
1966
1967 /* XXX: tstate must be saved properly */
1968 // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
1969 err |= __put_user(env->pc, &((*grp)[MC_PC]));
1970 err |= __put_user(env->npc, &((*grp)[MC_NPC]));
1971 err |= __put_user(env->y, &((*grp)[MC_Y]));
1972 err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
1973 err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
1974 err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
1975 err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
1976 err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
1977 err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
1978 err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
1979 err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
1980 err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
1981 err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
1982 err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
1983 err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
1984 err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
1985 err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
1986 err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
1987
1988 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
1989 fp = i7 = 0;
1990 if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
1991 abi_ulong) != 0)
1992 goto do_sigsegv;
1993 if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
1994 abi_ulong) != 0)
1995 goto do_sigsegv;
1996 err |= __put_user(fp, &(mcp->mc_fp));
1997 err |= __put_user(i7, &(mcp->mc_i7));
1998
1999 {
2000 uint32_t *src, *dst;
2001 src = env->fpr;
2002 dst = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2003 /* XXX: check that the CPU storage is the same as user context */
2004 for (i = 0; i < 64; i++, dst++, src++)
2005 err |= __put_user(*src, dst);
2006 }
2007 err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
2008 err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
2009 err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
2010
2011 if (err)
2012 goto do_sigsegv;
2013 unlock_user_struct(ucp, ucp_addr, 1);
2014 return;
2015 do_sigsegv:
2016 unlock_user_struct(ucp, ucp_addr, 1);
2017 force_sig(SIGSEGV);
2018 }
2019 #endif
2020 #elif defined(TARGET_ABI_MIPSN64)
2021
2022 # warning signal handling not implemented
2023
2024 static void setup_frame(int sig, struct emulated_sigaction *ka,
2025 target_sigset_t *set, CPUState *env)
2026 {
2027 fprintf(stderr, "setup_frame: not implemented\n");
2028 }
2029
2030 static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
2031 target_siginfo_t *info,
2032 target_sigset_t *set, CPUState *env)
2033 {
2034 fprintf(stderr, "setup_rt_frame: not implemented\n");
2035 }
2036
2037 long do_sigreturn(CPUState *env)
2038 {
2039 fprintf(stderr, "do_sigreturn: not implemented\n");
2040 return -TARGET_ENOSYS;
2041 }
2042
2043 long do_rt_sigreturn(CPUState *env)
2044 {
2045 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2046 return -TARGET_ENOSYS;
2047 }
2048
2049 #elif defined(TARGET_ABI_MIPSN32)
2050
2051 # warning signal handling not implemented
2052
2053 static void setup_frame(int sig, struct emulated_sigaction *ka,
2054 target_sigset_t *set, CPUState *env)
2055 {
2056 fprintf(stderr, "setup_frame: not implemented\n");
2057 }
2058
2059 static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
2060 target_siginfo_t *info,
2061 target_sigset_t *set, CPUState *env)
2062 {
2063 fprintf(stderr, "setup_rt_frame: not implemented\n");
2064 }
2065
2066 long do_sigreturn(CPUState *env)
2067 {
2068 fprintf(stderr, "do_sigreturn: not implemented\n");
2069 return -TARGET_ENOSYS;
2070 }
2071
2072 long do_rt_sigreturn(CPUState *env)
2073 {
2074 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2075 return -TARGET_ENOSYS;
2076 }
2077
2078 #elif defined(TARGET_ABI_MIPSO32)
2079
2080 struct target_sigcontext {
2081 uint32_t sc_regmask; /* Unused */
2082 uint32_t sc_status;
2083 uint64_t sc_pc;
2084 uint64_t sc_regs[32];
2085 uint64_t sc_fpregs[32];
2086 uint32_t sc_ownedfp; /* Unused */
2087 uint32_t sc_fpc_csr;
2088 uint32_t sc_fpc_eir; /* Unused */
2089 uint32_t sc_used_math;
2090 uint32_t sc_dsp; /* dsp status, was sc_ssflags */
2091 uint64_t sc_mdhi;
2092 uint64_t sc_mdlo;
2093 target_ulong sc_hi1; /* Was sc_cause */
2094 target_ulong sc_lo1; /* Was sc_badvaddr */
2095 target_ulong sc_hi2; /* Was sc_sigset[4] */
2096 target_ulong sc_lo2;
2097 target_ulong sc_hi3;
2098 target_ulong sc_lo3;
2099 };
2100
2101 struct sigframe {
2102 uint32_t sf_ass[4]; /* argument save space for o32 */
2103 uint32_t sf_code[2]; /* signal trampoline */
2104 struct target_sigcontext sf_sc;
2105 target_sigset_t sf_mask;
2106 };
2107
2108 /* Install trampoline to jump back from signal handler */
2109 static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
2110 {
2111 int err;
2112
2113 /*
2114 * Set up the return code ...
2115 *
2116 * li v0, __NR__foo_sigreturn
2117 * syscall
2118 */
2119
2120 err = __put_user(0x24020000 + syscall, tramp + 0);
2121 err |= __put_user(0x0000000c , tramp + 1);
2122 /* flush_cache_sigtramp((unsigned long) tramp); */
2123 return err;
2124 }
2125
2126 static inline int
2127 setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2128 {
2129 int err = 0;
2130
2131 err |= __put_user(regs->PC[regs->current_tc], &sc->sc_pc);
2132
2133 #define save_gp_reg(i) do { \
2134 err |= __put_user(regs->gpr[i][regs->current_tc], &sc->sc_regs[i]); \
2135 } while(0)
2136 __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2);
2137 save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6);
2138 save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10);
2139 save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
2140 save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18);
2141 save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22);
2142 save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
2143 save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30);
2144 save_gp_reg(31);
2145 #undef save_gp_reg
2146
2147 err |= __put_user(regs->HI[0][regs->current_tc], &sc->sc_mdhi);
2148 err |= __put_user(regs->LO[0][regs->current_tc], &sc->sc_mdlo);
2149
2150 /* Not used yet, but might be useful if we ever have DSP suppport */
2151 #if 0
2152 if (cpu_has_dsp) {
2153 err |= __put_user(mfhi1(), &sc->sc_hi1);
2154 err |= __put_user(mflo1(), &sc->sc_lo1);
2155 err |= __put_user(mfhi2(), &sc->sc_hi2);
2156 err |= __put_user(mflo2(), &sc->sc_lo2);
2157 err |= __put_user(mfhi3(), &sc->sc_hi3);
2158 err |= __put_user(mflo3(), &sc->sc_lo3);
2159 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2160 }
2161 /* same with 64 bit */
2162 #ifdef CONFIG_64BIT
2163 err |= __put_user(regs->hi, &sc->sc_hi[0]);
2164 err |= __put_user(regs->lo, &sc->sc_lo[0]);
2165 if (cpu_has_dsp) {
2166 err |= __put_user(mfhi1(), &sc->sc_hi[1]);
2167 err |= __put_user(mflo1(), &sc->sc_lo[1]);
2168 err |= __put_user(mfhi2(), &sc->sc_hi[2]);
2169 err |= __put_user(mflo2(), &sc->sc_lo[2]);
2170 err |= __put_user(mfhi3(), &sc->sc_hi[3]);
2171 err |= __put_user(mflo3(), &sc->sc_lo[3]);
2172 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
2173 }
2174 #endif
2175 #endif
2176
2177 #if 0
2178 err |= __put_user(!!used_math(), &sc->sc_used_math);
2179
2180 if (!used_math())
2181 goto out;
2182
2183 /*
2184 * Save FPU state to signal context. Signal handler will "inherit"
2185 * current FPU state.
2186 */
2187 preempt_disable();
2188
2189 if (!is_fpu_owner()) {
2190 own_fpu();
2191 restore_fp(current);
2192 }
2193 err |= save_fp_context(sc);
2194
2195 preempt_enable();
2196 out:
2197 #endif
2198 return err;
2199 }
2200
2201 static inline int
2202 restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2203 {
2204 int err = 0;
2205
2206 err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
2207
2208 err |= __get_user(regs->HI[0][regs->current_tc], &sc->sc_mdhi);
2209 err |= __get_user(regs->LO[0][regs->current_tc], &sc->sc_mdlo);
2210
2211 #define restore_gp_reg(i) do { \
2212 err |= __get_user(regs->gpr[i][regs->current_tc], &sc->sc_regs[i]); \
2213 } while(0)
2214 restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3);
2215 restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6);
2216 restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9);
2217 restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12);
2218 restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15);
2219 restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18);
2220 restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21);
2221 restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24);
2222 restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27);
2223 restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30);
2224 restore_gp_reg(31);
2225 #undef restore_gp_reg
2226
2227 #if 0
2228 if (cpu_has_dsp) {
2229 err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
2230 err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
2231 err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
2232 err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
2233 err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
2234 err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
2235 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2236 }
2237 #ifdef CONFIG_64BIT
2238 err |= __get_user(regs->hi, &sc->sc_hi[0]);
2239 err |= __get_user(regs->lo, &sc->sc_lo[0]);
2240 if (cpu_has_dsp) {
2241 err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
2242 err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
2243 err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
2244 err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
2245 err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
2246 err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
2247 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
2248 }
2249 #endif
2250
2251 err |= __get_user(used_math, &sc->sc_used_math);
2252 conditional_used_math(used_math);
2253
2254 preempt_disable();
2255
2256 if (used_math()) {
2257 /* restore fpu context if we have used it before */
2258 own_fpu();
2259 err |= restore_fp_context(sc);
2260 } else {
2261 /* signal handler may have used FPU. Give it up. */
2262 lose_fpu();
2263 }
2264
2265 preempt_enable();
2266 #endif
2267 return err;
2268 }
2269 /*
2270 * Determine which stack to use..
2271 */
2272 static inline abi_ulong
2273 get_sigframe(struct emulated_sigaction *ka, CPUState *regs, size_t frame_size)
2274 {
2275 unsigned long sp;
2276
2277 /* Default to using normal stack */
2278 sp = regs->gpr[29][regs->current_tc];
2279
2280 /*
2281 * FPU emulator may have it's own trampoline active just
2282 * above the user stack, 16-bytes before the next lowest
2283 * 16 byte boundary. Try to avoid trashing it.
2284 */
2285 sp -= 32;
2286
2287 /* This is the X/Open sanctioned signal stack switching. */
2288 if ((ka->sa.sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
2289 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2290 }
2291
2292 return (sp - frame_size) & ~7;
2293 }
2294
2295 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */
2296 static void setup_frame(int sig, struct emulated_sigaction * ka,
2297 target_sigset_t *set, CPUState *regs)
2298 {
2299 struct sigframe *frame;
2300 abi_ulong frame_addr;
2301 int i;
2302
2303 frame_addr = get_sigframe(ka, regs, sizeof(*frame));
2304 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2305 goto give_sigsegv;
2306
2307 install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
2308
2309 if(setup_sigcontext(regs, &frame->sf_sc))
2310 goto give_sigsegv;
2311
2312 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2313 if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
2314 goto give_sigsegv;
2315 }
2316
2317 /*
2318 * Arguments to signal handler:
2319 *
2320 * a0 = signal number
2321 * a1 = 0 (should be cause)
2322 * a2 = pointer to struct sigcontext
2323 *
2324 * $25 and PC point to the signal handler, $29 points to the
2325 * struct sigframe.
2326 */
2327 regs->gpr[ 4][regs->current_tc] = sig;
2328 regs->gpr[ 5][regs->current_tc] = 0;
2329 regs->gpr[ 6][regs->current_tc] = frame_addr + offsetof(struct sigframe, sf_sc);
2330 regs->gpr[29][regs->current_tc] = frame_addr;
2331 regs->gpr[31][regs->current_tc] = frame_addr + offsetof(struct sigframe, sf_code);
2332 /* The original kernel code sets CP0_EPC to the handler
2333 * since it returns to userland using eret
2334 * we cannot do this here, and we must set PC directly */
2335 regs->PC[regs->current_tc] = regs->gpr[25][regs->current_tc] = ka->sa._sa_handler;
2336 unlock_user_struct(frame, frame_addr, 1);
2337 return;
2338
2339 give_sigsegv:
2340 unlock_user_struct(frame, frame_addr, 1);
2341 force_sig(TARGET_SIGSEGV/*, current*/);
2342 return;
2343 }
2344
2345 long do_sigreturn(CPUState *regs)
2346 {
2347 struct sigframe *frame;
2348 abi_ulong frame_addr;
2349 sigset_t blocked;
2350 target_sigset_t target_set;
2351 int i;
2352
2353 #if defined(DEBUG_SIGNAL)
2354 fprintf(stderr, "do_sigreturn\n");
2355 #endif
2356 frame_addr = regs->gpr[29][regs->current_tc];
2357 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2358 goto badframe;
2359
2360 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2361 if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
2362 goto badframe;
2363 }
2364
2365 target_to_host_sigset_internal(&blocked, &target_set);
2366 sigprocmask(SIG_SETMASK, &blocked, NULL);
2367
2368 if (restore_sigcontext(regs, &frame->sf_sc))
2369 goto badframe;
2370
2371 #if 0
2372 /*
2373 * Don't let your children do this ...
2374 */
2375 __asm__ __volatile__(
2376 "move\t$29, %0\n\t"
2377 "j\tsyscall_exit"
2378 :/* no outputs */
2379 :"r" (&regs));
2380 /* Unreached */
2381 #endif
2382
2383 regs->PC[regs->current_tc] = regs->CP0_EPC;
2384 /* I am not sure this is right, but it seems to work
2385 * maybe a problem with nested signals ? */
2386 regs->CP0_EPC = 0;
2387 return 0;
2388
2389 badframe:
2390 force_sig(TARGET_SIGSEGV/*, current*/);
2391 return 0;
2392 }
2393
2394 static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
2395 target_siginfo_t *info,
2396 target_sigset_t *set, CPUState *env)
2397 {
2398 fprintf(stderr, "setup_rt_frame: not implemented\n");
2399 }
2400
2401 long do_rt_sigreturn(CPUState *env)
2402 {
2403 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2404 return -TARGET_ENOSYS;
2405 }
2406
2407 #elif defined(TARGET_SH4)
2408
2409 /*
2410 * code and data structures from linux kernel:
2411 * include/asm-sh/sigcontext.h
2412 * arch/sh/kernel/signal.c
2413 */
2414
2415 struct target_sigcontext {
2416 target_ulong oldmask;
2417
2418 /* CPU registers */
2419 target_ulong sc_gregs[16];
2420 target_ulong sc_pc;
2421 target_ulong sc_pr;
2422 target_ulong sc_sr;
2423 target_ulong sc_gbr;
2424 target_ulong sc_mach;
2425 target_ulong sc_macl;
2426
2427 /* FPU registers */
2428 target_ulong sc_fpregs[16];
2429 target_ulong sc_xfpregs[16];
2430 unsigned int sc_fpscr;
2431 unsigned int sc_fpul;
2432 unsigned int sc_ownedfp;
2433 };
2434
2435 struct target_sigframe
2436 {
2437 struct target_sigcontext sc;
2438 target_ulong extramask[TARGET_NSIG_WORDS-1];
2439 uint16_t retcode[3];
2440 };
2441
2442
2443 struct target_ucontext {
2444 target_ulong uc_flags;
2445 struct target_ucontext *uc_link;
2446 target_stack_t uc_stack;
2447 struct target_sigcontext uc_mcontext;
2448 target_sigset_t uc_sigmask; /* mask last for extensibility */
2449 };
2450
2451 struct target_rt_sigframe
2452 {
2453 struct target_siginfo info;
2454 struct target_ucontext uc;
2455 uint16_t retcode[3];
2456 };
2457
2458
2459 #define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
2460 #define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
2461
2462 static abi_ulong get_sigframe(struct emulated_sigaction *ka,
2463 unsigned long sp, size_t frame_size)
2464 {
2465 if ((ka->sa.sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
2466 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2467 }
2468
2469 return (sp - frame_size) & -8ul;
2470 }
2471
2472 static int setup_sigcontext(struct target_sigcontext *sc,
2473 CPUState *regs, unsigned long mask)
2474 {
2475 int err = 0;
2476
2477 #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
2478 COPY(gregs[0]); COPY(gregs[1]);
2479 COPY(gregs[2]); COPY(gregs[3]);
2480 COPY(gregs[4]); COPY(gregs[5]);
2481 COPY(gregs[6]); COPY(gregs[7]);
2482 COPY(gregs[8]); COPY(gregs[9]);
2483 COPY(gregs[10]); COPY(gregs[11]);
2484 COPY(gregs[12]); COPY(gregs[13]);
2485 COPY(gregs[14]); COPY(gregs[15]);
2486 COPY(gbr); COPY(mach);
2487 COPY(macl); COPY(pr);
2488 COPY(sr); COPY(pc);
2489 #undef COPY
2490
2491 /* todo: save FPU registers here */
2492
2493 /* non-iBCS2 extensions.. */
2494 err |= __put_user(mask, &sc->oldmask);
2495
2496 return err;
2497 }
2498
2499 static int restore_sigcontext(struct CPUState *regs,
2500 struct target_sigcontext *sc)
2501 {
2502 unsigned int err = 0;
2503
2504 #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
2505 COPY(gregs[1]);
2506 COPY(gregs[2]); COPY(gregs[3]);
2507 COPY(gregs[4]); COPY(gregs[5]);
2508 COPY(gregs[6]); COPY(gregs[7]);
2509 COPY(gregs[8]); COPY(gregs[9]);
2510 COPY(gregs[10]); COPY(gregs[11]);
2511 COPY(gregs[12]); COPY(gregs[13]);
2512 COPY(gregs[14]); COPY(gregs[15]);
2513 COPY(gbr); COPY(mach);
2514 COPY(macl); COPY(pr);
2515 COPY(sr); COPY(pc);
2516 #undef COPY
2517
2518 /* todo: restore FPU registers here */
2519
2520 regs->tra = -1; /* disable syscall checks */
2521 return err;
2522 }
2523
2524 static void setup_frame(int sig, struct emulated_sigaction *ka,
2525 target_sigset_t *set, CPUState *regs)
2526 {
2527 struct target_sigframe *frame;
2528 abi_ulong frame_addr;
2529 int i;
2530 int err = 0;
2531 int signal;
2532
2533 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
2534 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2535 goto give_sigsegv;
2536
2537 signal = current_exec_domain_sig(sig);
2538
2539 err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
2540
2541 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
2542 err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
2543 }
2544
2545 /* Set up to return from userspace. If provided, use a stub
2546 already in userspace. */
2547 if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
2548 regs->pr = (unsigned long) ka->sa.sa_restorer;
2549 } else {
2550 /* Generate return code (system call to sigreturn) */
2551 err |= __put_user(MOVW(2), &frame->retcode[0]);
2552 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
2553 err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
2554 regs->pr = (unsigned long) frame->retcode;
2555 }
2556
2557 if (err)
2558 goto give_sigsegv;
2559
2560 /* Set up registers for signal handler */
2561 regs->gregs[15] = (unsigned long) frame;
2562 regs->gregs[4] = signal; /* Arg for signal handler */
2563 regs->gregs[5] = 0;
2564 regs->gregs[6] = (unsigned long) &frame->sc;
2565 regs->pc = (unsigned long) ka->sa._sa_handler;
2566
2567 unlock_user_struct(frame, frame_addr, 1);
2568 return;
2569
2570 give_sigsegv:
2571 unlock_user_struct(frame, frame_addr, 1);
2572 force_sig(SIGSEGV);
2573 }
2574
2575 static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
2576 target_siginfo_t *info,
2577 target_sigset_t *set, CPUState *regs)
2578 {
2579 struct target_rt_sigframe *frame;
2580 abi_ulong frame_addr;
2581 int i;
2582 int err = 0;
2583 int signal;
2584
2585 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
2586 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
2587 goto give_sigsegv;
2588
2589 signal = current_exec_domain_sig(sig);
2590
2591 err |= copy_siginfo_to_user(&frame->info, info);
2592
2593 /* Create the ucontext. */
2594 err |= __put_user(0, &frame->uc.uc_flags);
2595 err |= __put_user(0, (unsigned long *)&frame->uc.uc_link);
2596 err |= __put_user((void *)target_sigaltstack_used.ss_sp,
2597 &frame->uc.uc_stack.ss_sp);
2598 err |= __put_user(sas_ss_flags(regs->gregs[15]),
2599 &frame->uc.uc_stack.ss_flags);
2600 err |= __put_user(target_sigaltstack_used.ss_size,
2601 &frame->uc.uc_stack.ss_size);
2602 err |= setup_sigcontext(&frame->uc.uc_mcontext,
2603 regs, set->sig[0]);
2604 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
2605 err |= __put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i]);
2606 }
2607
2608 /* Set up to return from userspace. If provided, use a stub
2609 already in userspace. */
2610 if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
2611 regs->pr = (unsigned long) ka->sa.sa_restorer;
2612 } else {
2613 /* Generate return code (system call to sigreturn) */
2614 err |= __put_user(MOVW(2), &frame->retcode[0]);
2615 err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
2616 err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
2617 regs->pr = (unsigned long) frame->retcode;
2618 }
2619
2620 if (err)
2621 goto give_sigsegv;
2622
2623 /* Set up registers for signal handler */
2624 regs->gregs[15] = (unsigned long) frame;
2625 regs->gregs[4] = signal; /* Arg for signal handler */
2626 regs->gregs[5] = (unsigned long) &frame->info;
2627 regs->gregs[6] = (unsigned long) &frame->uc;
2628 regs->pc = (unsigned long) ka->sa._sa_handler;
2629
2630 unlock_user_struct(frame, frame_addr, 1);
2631 return;
2632
2633 give_sigsegv:
2634 unlock_user_struct(frame, frame_addr, 1);
2635 force_sig(SIGSEGV);
2636 }
2637
2638 long do_sigreturn(CPUState *regs)
2639 {
2640 struct target_sigframe *frame;
2641 abi_ulong frame_addr;
2642 sigset_t blocked;
2643 target_sigset_t target_set;
2644 int i;
2645 int err = 0;
2646
2647 #if defined(DEBUG_SIGNAL)
2648 fprintf(stderr, "do_sigreturn\n");
2649 #endif
2650 frame_addr = regs->gregs[15];
2651 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2652 goto badframe;
2653
2654 err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
2655 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2656 err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
2657 }
2658
2659 if (err)
2660 goto badframe;
2661
2662 target_to_host_sigset_internal(&blocked, &target_set);
2663 sigprocmask(SIG_SETMASK, &blocked, NULL);
2664
2665 if (restore_sigcontext(regs, &frame->sc))
2666 goto badframe;
2667
2668 unlock_user_struct(frame, frame_addr, 0);
2669 return regs->gregs[0];
2670
2671 badframe:
2672 unlock_user_struct(frame, frame_addr, 0);
2673 force_sig(TARGET_SIGSEGV);
2674 return 0;
2675 }
2676
2677 long do_rt_sigreturn(CPUState *regs)
2678 {
2679 struct target_rt_sigframe *frame;
2680 abi_ulong frame_addr;
2681 sigset_t blocked;
2682
2683 #if defined(DEBUG_SIGNAL)
2684 fprintf(stderr, "do_rt_sigreturn\n");
2685 #endif
2686 frame_addr = regs->gregs[15];
2687 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
2688 goto badframe;
2689
2690 target_to_host_sigset(&blocked, &frame->uc.uc_sigmask);
2691 sigprocmask(SIG_SETMASK, &blocked, NULL);
2692
2693 if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
2694 goto badframe;
2695
2696 if (do_sigaltstack(frame_addr +
2697 offsetof(struct target_rt_sigframe, uc.uc_stack),
2698 0, get_sp_from_cpustate(regs)) == -EFAULT)
2699 goto badframe;
2700
2701 unlock_user_struct(frame, frame_addr, 0);
2702 return regs->gregs[0];
2703
2704 badframe:
2705 unlock_user_struct(frame, frame_addr, 0);
2706 force_sig(TARGET_SIGSEGV);
2707 return 0;
2708 }
2709
2710 #else
2711
2712 static void setup_frame(int sig, struct emulated_sigaction *ka,
2713 target_sigset_t *set, CPUState *env)
2714 {
2715 fprintf(stderr, "setup_frame: not implemented\n");
2716 }
2717
2718 static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
2719 target_siginfo_t *info,
2720 target_sigset_t *set, CPUState *env)
2721 {
2722 fprintf(stderr, "setup_rt_frame: not implemented\n");
2723 }
2724
2725 long do_sigreturn(CPUState *env)
2726 {
2727 fprintf(stderr, "do_sigreturn: not implemented\n");
2728 return -TARGET_ENOSYS;
2729 }
2730
2731 long do_rt_sigreturn(CPUState *env)
2732 {
2733 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
2734 return -TARGET_ENOSYS;
2735 }
2736
2737 #endif
2738
2739 void process_pending_signals(void *cpu_env)
2740 {
2741 int sig;
2742 abi_ulong handler;
2743 sigset_t set, old_set;
2744 target_sigset_t target_old_set;
2745 struct emulated_sigaction *k;
2746 struct sigqueue *q;
2747
2748 if (!signal_pending)
2749 return;
2750
2751 k = sigact_table;
2752 for(sig = 1; sig <= TARGET_NSIG; sig++) {
2753 if (k->pending)
2754 goto handle_signal;
2755 k++;
2756 }
2757 /* if no signal is pending, just return */
2758 signal_pending = 0;
2759 return;
2760
2761 handle_signal:
2762 #ifdef DEBUG_SIGNAL
2763 fprintf(stderr, "qemu: process signal %d\n", sig);
2764 #endif
2765 /* dequeue signal */
2766 q = k->first;
2767 k->first = q->next;
2768 if (!k->first)
2769 k->pending = 0;
2770
2771 sig = gdb_handlesig (cpu_env, sig);
2772 if (!sig) {
2773 fprintf (stderr, "Lost signal\n");
2774 abort();
2775 }
2776
2777 handler = k->sa._sa_handler;
2778 if (handler == TARGET_SIG_DFL) {
2779 /* default handler : ignore some signal. The other are fatal */
2780 if (sig != TARGET_SIGCHLD &&
2781 sig != TARGET_SIGURG &&
2782 sig != TARGET_SIGWINCH) {
2783 force_sig(sig);
2784 }
2785 } else if (handler == TARGET_SIG_IGN) {
2786 /* ignore sig */
2787 } else if (handler == TARGET_SIG_ERR) {
2788 force_sig(sig);
2789 } else {
2790 /* compute the blocked signals during the handler execution */
2791 target_to_host_sigset(&set, &k->sa.sa_mask);
2792 /* SA_NODEFER indicates that the current signal should not be
2793 blocked during the handler */
2794 if (!(k->sa.sa_flags & TARGET_SA_NODEFER))
2795 sigaddset(&set, target_to_host_signal(sig));
2796
2797 /* block signals in the handler using Linux */
2798 sigprocmask(SIG_BLOCK, &set, &old_set);
2799 /* save the previous blocked signal state to restore it at the
2800 end of the signal execution (see do_sigreturn) */
2801 host_to_target_sigset_internal(&target_old_set, &old_set);
2802
2803 /* if the CPU is in VM86 mode, we restore the 32 bit values */
2804 #if defined(TARGET_I386) && !defined(TARGET_X86_64)
2805 {
2806 CPUX86State *env = cpu_env;
2807 if (env->eflags & VM_MASK)
2808 save_v86_state(env);
2809 }
2810 #endif
2811 /* prepare the stack frame of the virtual CPU */
2812 if (k->sa.sa_flags & TARGET_SA_SIGINFO)
2813 setup_rt_frame(sig, k, &q->info, &target_old_set, cpu_env);
2814 else
2815 setup_frame(sig, k, &target_old_set, cpu_env);
2816 if (k->sa.sa_flags & TARGET_SA_RESETHAND)
2817 k->sa._sa_handler = TARGET_SIG_DFL;
2818 }
2819 if (q != &k->info)
2820 free_sigqueue(q);
2821 }
Patches shipped by Fedora