]> Git Repo - qemu.git/blame - linux-user/signal.c
projects / qemu.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Convert tick operations to TCG
[qemu.git] / linux-user / signal.c
CommitLineData
31e31b8a 1/*
66fb9763 2 * Emulation of Linux signals
5fafdf24 3 *
31e31b8a
FB		 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>
66fb9763 22#include <string.h>
31e31b8a 23#include <stdarg.h>
2677e107 24#include <unistd.h>
31e31b8a 25#include <signal.h>
66fb9763 26#include <errno.h>
31e31b8a
FB		 27#include <sys/ucontext.h>
28
3ef693a0 29#include "qemu.h"
992f48a0 30#include "target_signal.h"
66fb9763
FB		 31
32//#define DEBUG_SIGNAL
33
34#define MAX_SIGQUEUE_SIZE 1024
35
36struct sigqueue {
37 struct sigqueue *next;
9de5e440 38 target_siginfo_t info;
66fb9763 39};
31e31b8a
FB		 40
41struct emulated_sigaction {
42 struct target_sigaction sa;
66fb9763
FB		 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 */
31e31b8a
FB		 47};
48
a04e134a
TS		 49struct target_sigaltstack target_sigaltstack_used = {
50 .ss_sp = 0,
51 .ss_size = 0,
52 .ss_flags = TARGET_SS_DISABLE,
53};
54
66fb9763
FB		 55static struct emulated_sigaction sigact_table[TARGET_NSIG];
56static struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
57static struct sigqueue *first_free; /* first free siginfo queue entry */
58static int signal_pending; /* non zero if a signal may be pending */
31e31b8a 59
5fafdf24 60static void host_signal_handler(int host_signum, siginfo_t *info,
66fb9763
FB		 61 void *puc);
62
9e5f5284
FB		 63static 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,
01e3b763 70/* [SIGIOT] = TARGET_SIGIOT,*/
9e5f5284
FB		 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};
100static uint8_t target_to_host_signal_table[65];
101
a04e134a
TS		 102static 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
108static 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
31e31b8a
FB		 114static inline int host_to_target_signal(int sig)
115{
9e5f5284 116 return host_to_target_signal_table[sig];
31e31b8a
FB		 117}
118
119static inline int target_to_host_signal(int sig)
120{
9e5f5284 121 return target_to_host_signal_table[sig];
31e31b8a
FB		 122}
123
5fafdf24 124static void host_to_target_sigset_internal(target_sigset_t *d,
9231944d 125 const sigset_t *s)
66fb9763
FB		 126{
127 int i;
9e5f5284
FB		 128 unsigned long sigmask;
129 uint32_t target_sigmask;
3b46e624 130
9e5f5284
FB		 131 sigmask = ((unsigned long *)s)[0];
132 target_sigmask = 0;
133 for(i = 0; i < 32; i++) {
5fafdf24 134 if (sigmask & (1 << i))
9e5f5284
FB		 135 target_sigmask |= 1 << (host_to_target_signal(i + 1) - 1);
136 }
992f48a0 137#if TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 32
9231944d 138 d->sig[0] = target_sigmask;
9e5f5284 139 for(i = 1;i < TARGET_NSIG_WORDS; i++) {
9231944d 140 d->sig[i] = ((unsigned long *)s)[i];
66fb9763 141 }
992f48a0 142#elif TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
9231944d
FB		 143 d->sig[0] = target_sigmask;
144 d->sig[1] = sigmask >> 32;
9e5f5284 145#else
459a4017 146 /* XXX: do it */
9e5f5284 147#endif
66fb9763
FB		 148}
149
9231944d
FB		 150void 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++)
53a5960a 157 d->sig[i] = tswapl(d1.sig[i]);
9231944d
FB		 158}
159
160void target_to_host_sigset_internal(sigset_t *d, const target_sigset_t *s)
66fb9763
FB		 161{
162 int i;
9e5f5284 163 unsigned long sigmask;
992f48a0 164 abi_ulong target_sigmask;
9e5f5284 165
9231944d 166 target_sigmask = s->sig[0];
9e5f5284
FB		 167 sigmask = 0;
168 for(i = 0; i < 32; i++) {
5fafdf24 169 if (target_sigmask & (1 << i))
9e5f5284
FB		 170 sigmask |= 1 << (target_to_host_signal(i + 1) - 1);
171 }
992f48a0 172#if TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 32
9e5f5284
FB		 173 ((unsigned long *)d)[0] = sigmask;
174 for(i = 1;i < TARGET_NSIG_WORDS; i++) {
9231944d 175 ((unsigned long *)d)[i] = s->sig[i];
66fb9763 176 }
992f48a0 177#elif TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
9231944d 178 ((unsigned long *)d)[0] = sigmask | ((unsigned long)(s->sig[1]) << 32);
9e5f5284 179#else
459a4017 180 /* XXX: do it */
992f48a0 181#endif /* TARGET_ABI_BITS */
66fb9763
FB		 182}
183
9231944d
FB		 184void 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++)
53a5960a 190 s1.sig[i] = tswapl(s->sig[i]);
9231944d
FB		 191 target_to_host_sigset_internal(d, &s1);
192}
3b46e624 193
992f48a0 194void host_to_target_old_sigset(abi_ulong *old_sigset,
66fb9763
FB		 195 const sigset_t *sigset)
196{
9e5f5284
FB		 197 target_sigset_t d;
198 host_to_target_sigset(&d, sigset);
199 *old_sigset = d.sig[0];
66fb9763
FB		 200}
201
5fafdf24 202void target_to_host_old_sigset(sigset_t *sigset,
992f48a0 203 const abi_ulong *old_sigset)
66fb9763 204{
9e5f5284
FB		 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);
66fb9763
FB		 212}
213
9de5e440
FB		 214/* siginfo conversion */
215
5fafdf24 216static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
9de5e440 217 const siginfo_t *info)
66fb9763 218{
9de5e440
FB		 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;
5fafdf24 224 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
447db213 225 sig == SIGBUS || sig == SIGTRAP) {
9de5e440
FB		 226 /* should never come here, but who knows. The information for
227 the target is irrelevant */
228 tinfo->_sifields._sigfault._addr = 0;
7f7f7c84
TS		 229 } else if (sig == SIGIO) {
230 tinfo->_sifields._sigpoll._fd = info->si_fd;
9de5e440
FB		 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 */
5fafdf24 235 tinfo->_sifields._rt._sigval.sival_ptr =
459a4017 236 (abi_ulong)(unsigned long)info->si_value.sival_ptr;
9de5e440
FB		 237 }
238}
239
5fafdf24 240static void tswap_siginfo(target_siginfo_t *tinfo,
9de5e440
FB		 241 const target_siginfo_t *info)
242{
243 int sig;
244 sig = info->si_signo;
245 tinfo->si_signo = tswap32(sig);
66fb9763
FB		 246 tinfo->si_errno = tswap32(info->si_errno);
247 tinfo->si_code = tswap32(info->si_code);
5fafdf24 248 if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
447db213 249 sig == SIGBUS || sig == SIGTRAP) {
5fafdf24 250 tinfo->_sifields._sigfault._addr =
9de5e440 251 tswapl(info->_sifields._sigfault._addr);
7f7f7c84
TS		 252 } else if (sig == SIGIO) {
253 tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd);
9de5e440
FB		 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);
5fafdf24 257 tinfo->_sifields._rt._sigval.sival_ptr =
9de5e440
FB		 258 tswapl(info->_sifields._rt._sigval.sival_ptr);
259 }
260}
261
262
263void 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);
66fb9763
FB		 267}
268
9de5e440 269/* XXX: we support only POSIX RT signals are used. */
aa1f17c1 270/* XXX: find a solution for 64 bit (additional malloced data is needed) */
9de5e440 271void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo)
66fb9763
FB		 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);
9de5e440
FB		 276 info->si_pid = tswap32(tinfo->_sifields._rt._pid);
277 info->si_uid = tswap32(tinfo->_sifields._rt._uid);
5fafdf24 278 info->si_value.sival_ptr =
459a4017 279 (void *)(long)tswapl(tinfo->_sifields._rt._sigval.sival_ptr);
66fb9763
FB		 280}
281
31e31b8a
FB		 282void signal_init(void)
283{
284 struct sigaction act;
9e5f5284 285 int i, j;
31e31b8a 286
9e5f5284
FB		 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 }
3b46e624 296
9de5e440
FB		 297 /* set all host signal handlers. ALL signals are blocked during
298 the handlers to serialize them. */
299 sigfillset(&act.sa_mask);
31e31b8a
FB		 300 act.sa_flags = SA_SIGINFO;
301 act.sa_sigaction = host_signal_handler;
302 for(i = 1; i < NSIG; i++) {
c9087c2a 303 sigaction(i, &act, NULL);
31e31b8a 304 }
3b46e624 305
31e31b8a 306 memset(sigact_table, 0, sizeof(sigact_table));
66fb9763
FB		 307
308 first_free = &sigqueue_table[0];
5fafdf24 309 for(i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++)
66fb9763
FB		 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
316static 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;
31e31b8a
FB		 323}
324
66fb9763
FB		 325static inline void free_sigqueue(struct sigqueue *q)
326{
327 q->next = first_free;
328 first_free = q;
329}
330
9de5e440
FB		 331/* abort execution with signal */
332void __attribute((noreturn)) force_sig(int sig)
66fb9763
FB		 333{
334 int host_sig;
66fb9763 335 host_sig = target_to_host_signal(sig);
5fafdf24 336 fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
66fb9763 337 sig, strsignal(host_sig));
9de5e440 338#if 1
66fb9763 339 _exit(-host_sig);
9de5e440
FB		 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
66fb9763
FB		 350}
351
9de5e440
FB		 352/* queue a signal so that it will be send to the virtual CPU as soon
353 as possible */
354int queue_signal(int sig, target_siginfo_t *info)
31e31b8a 355{
66fb9763 356 struct emulated_sigaction *k;
9de5e440 357 struct sigqueue *q, **pq;
992f48a0 358 abi_ulong handler;
66fb9763 359
9de5e440 360#if defined(DEBUG_SIGNAL)
5fafdf24 361 fprintf(stderr, "queue_signal: sig=%d\n",
9de5e440 362 sig);
66fb9763 363#endif
9de5e440 364 k = &sigact_table[sig - 1];
66fb9763
FB		 365 handler = k->sa._sa_handler;
366 if (handler == TARGET_SIG_DFL) {
367 /* default handler : ignore some signal. The other are fatal */
5fafdf24
TS		 368 if (sig != TARGET_SIGCHLD &&
369 sig != TARGET_SIGURG &&
66fb9763
FB		 370 sig != TARGET_SIGWINCH) {
371 force_sig(sig);
9de5e440
FB		 372 } else {
373 return 0; /* indicate ignored */
66fb9763
FB		 374 }
375 } else if (handler == TARGET_SIG_IGN) {
376 /* ignore signal */
9de5e440 377 return 0;
66fb9763
FB		 378 } else if (handler == TARGET_SIG_ERR) {
379 force_sig(sig);
380 } else {
9de5e440
FB		 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
5fafdf24 410static void host_signal_handler(int host_signum, siginfo_t *info,
9de5e440
FB		 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 */
ec6338ba 418 if (host_signum == SIGSEGV || host_signum == SIGBUS) {
b346ff46 419 if (cpu_signal_handler(host_signum, info, puc))
9de5e440
FB		 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)
bc8a22cc 428 fprintf(stderr, "qemu: got signal %d\n", sig);
9de5e440
FB		 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 */
68a79315 433 cpu_interrupt(global_env, CPU_INTERRUPT_EXIT);
66fb9763
FB		 434 }
435}
436
0da46a6e 437/* do_sigaltstack() returns target values and errnos. */
579a97f7
FB		 438/* compare linux/kernel/signal.c:do_sigaltstack() */
439abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
a04e134a
TS		 440{
441 int ret;
442 struct target_sigaltstack oss;
443
444 /* XXX: test errors */
579a97f7 445 if(uoss_addr)
a04e134a
TS		 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
579a97f7 452 if(uss_addr)
a04e134a 453 {
579a97f7
FB		 454 struct target_sigaltstack *uss;
455 struct target_sigaltstack ss;
a04e134a 456
0da46a6e 457 ret = -TARGET_EFAULT;
579a97f7 458 if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)
a04e134a
TS		 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;
579a97f7 463 unlock_user_struct(uss, uss_addr, 0);
a04e134a 464
0da46a6e 465 ret = -TARGET_EPERM;
a04e134a
TS		 466 if (on_sig_stack(sp))
467 goto out;
468
0da46a6e 469 ret = -TARGET_EINVAL;
a04e134a
TS		 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 {
0da46a6e 479 ret = -TARGET_ENOMEM;
a04e134a
TS		 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
579a97f7 488 if (uoss_addr) {
0da46a6e 489 ret = -TARGET_EFAULT;
579a97f7 490 if (copy_to_user(uoss_addr, &oss, sizeof(oss)))
a04e134a 491 goto out;
a04e134a
TS		 492 }
493
494 ret = 0;
495out:
496 return ret;
497}
498
0da46a6e 499/* do_sigaction() return host values and errnos */
66fb9763
FB		 500int do_sigaction(int sig, const struct target_sigaction *act,
501 struct target_sigaction *oact)
502{
503 struct emulated_sigaction *k;
773b93ee
FB		 504 struct sigaction act1;
505 int host_sig;
0da46a6e 506 int ret = 0;
66fb9763 507
0aeaa8ce 508 if (sig < 1 || sig > TARGET_NSIG || sig == SIGKILL || sig == SIGSTOP)
66fb9763
FB		 509 return -EINVAL;
510 k = &sigact_table[sig - 1];
773b93ee 511#if defined(DEBUG_SIGNAL)
5fafdf24 512 fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
66fb9763
FB		 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);
388bb21a
TS		 518#if !defined(TARGET_MIPS)
519 oact->sa_restorer = tswapl(k->sa.sa_restorer);
520#endif
66fb9763
FB		 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);
388bb21a
TS		 526#if !defined(TARGET_MIPS)
527 k->sa.sa_restorer = tswapl(act->sa_restorer);
528#endif
66fb9763 529 k->sa.sa_mask = act->sa_mask;
773b93ee
FB		 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 }
0da46a6e 548 ret = sigaction(host_sig, &act1, NULL);
773b93ee 549 }
66fb9763 550 }
0da46a6e 551 return ret;
66fb9763
FB		 552}
553
43fff238
FB		 554#ifndef offsetof
555#define offsetof(type, field) ((size_t) &((type *)0)->field)
556#endif
557
5fafdf24 558static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
43fff238
FB		 559 const target_siginfo_t *info)
560{
561 tswap_siginfo(tinfo, info);
562 return 0;
563}
564
c3b5bc8a
TS		 565static 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
459a4017 571#if defined(TARGET_I386) && TARGET_ABI_BITS == 32
66fb9763
FB		 572
573/* from the Linux kernel */
574
575struct target_fpreg {
576 uint16_t significand[4];
577 uint16_t exponent;
578};
579
580struct target_fpxreg {
581 uint16_t significand[4];
582 uint16_t exponent;
583 uint16_t padding[3];
584};
585
586struct target_xmmreg {
992f48a0 587 abi_ulong element[4];
66fb9763
FB		 588};
589
590struct target_fpstate {
591 /* Regular FPU environment */
992f48a0
BS		 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;
66fb9763
FB		 599 struct target_fpreg _st[8];
600 uint16_t status;
601 uint16_t magic; /* 0xffff = regular FPU data only */
602
603 /* FXSR FPU environment */
992f48a0
BS		 604 abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
605 abi_ulong mxcsr;
606 abi_ulong reserved;
66fb9763
FB		 607 struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
608 struct target_xmmreg _xmm[8];
992f48a0 609 abi_ulong padding[56];
66fb9763
FB		 610};
611
612#define X86_FXSR_MAGIC 0x0000
613
614struct target_sigcontext {
615 uint16_t gs, __gsh;
616 uint16_t fs, __fsh;
617 uint16_t es, __esh;
618 uint16_t ds, __dsh;
992f48a0
BS		 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;
66fb9763 630 uint16_t cs, __csh;
992f48a0
BS		 631 abi_ulong eflags;
632 abi_ulong esp_at_signal;
66fb9763 633 uint16_t ss, __ssh;
992f48a0
BS		 634 abi_ulong fpstate; /* pointer */
635 abi_ulong oldmask;
636 abi_ulong cr2;
66fb9763
FB		 637};
638
66fb9763 639struct target_ucontext {
992f48a0
BS		 640 abi_ulong tuc_flags;
641 abi_ulong tuc_link;
b8076a74
FB		 642 target_stack_t tuc_stack;
643 struct target_sigcontext tuc_mcontext;
644 target_sigset_t tuc_sigmask; /* mask last for extensibility */
66fb9763
FB		 645};
646
647struct sigframe
648{
992f48a0 649 abi_ulong pretcode;
66fb9763
FB		 650 int sig;
651 struct target_sigcontext sc;
652 struct target_fpstate fpstate;
992f48a0 653 abi_ulong extramask[TARGET_NSIG_WORDS-1];
66fb9763
FB		 654 char retcode[8];
655};
656
657struct rt_sigframe
658{
992f48a0 659 abi_ulong pretcode;
66fb9763 660 int sig;
992f48a0
BS		 661 abi_ulong pinfo;
662 abi_ulong puc;
66fb9763
FB		 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
66fb9763
FB		 673/* XXX: save x87 state */
674static int
675setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
28be6234 676 CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr)
66fb9763
FB		 677{
678 int err = 0;
775b58d8 679 uint16_t magic;
66fb9763 680
579a97f7 681 /* already locked in setup_frame() */
a52c757c
FB		 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);
66fb9763
FB		 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);
66099dd9
FB		 694 err |= __put_user(env->exception_index, &sc->trapno);
695 err |= __put_user(env->error_code, &sc->err);
66fb9763 696 err |= __put_user(env->eip, &sc->eip);
a52c757c 697 err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
66fb9763
FB		 698 err |= __put_user(env->eflags, &sc->eflags);
699 err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
a52c757c 700 err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
ed2dcdf6 701
28be6234 702 cpu_x86_fsave(env, fpstate_addr, 1);
ed2dcdf6 703 fpstate->status = fpstate->sw;
775b58d8
FB		 704 magic = 0xffff;
705 err |= __put_user(magic, &fpstate->magic);
28be6234 706 err |= __put_user(fpstate_addr, &sc->fpstate);
ed2dcdf6 707
66fb9763
FB		 708 /* non-iBCS2 extensions.. */
709 err |= __put_user(mask, &sc->oldmask);
a52c757c 710 err |= __put_user(env->cr[2], &sc->cr2);
66fb9763 711 return err;
31e31b8a
FB		 712}
713
66fb9763
FB		 714/*
715 * Determine which stack to use..
716 */
31e31b8a 717
579a97f7 718static inline abi_ulong
66fb9763 719get_sigframe(struct emulated_sigaction *ka, CPUX86State *env, size_t frame_size)
31e31b8a 720{
66fb9763
FB		 721 unsigned long esp;
722
723 /* Default to using normal stack */
724 esp = env->regs[R_ESP];
66fb9763 725 /* This is the X/Open sanctioned signal stack switching. */
a04e134a
TS		 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 }
66fb9763
FB		 730
731 /* This is the legacy signal stack switching. */
5fafdf24 732 else
a52c757c
FB		 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 }
579a97f7 738 return (esp - frame_size) & -8ul;
66fb9763
FB		 739}
740
579a97f7 741/* compare linux/arch/i386/kernel/signal.c:setup_frame() */
66fb9763
FB		 742static void setup_frame(int sig, struct emulated_sigaction *ka,
743 target_sigset_t *set, CPUX86State *env)
744{
579a97f7 745 abi_ulong frame_addr;
66fb9763 746 struct sigframe *frame;
9231944d 747 int i, err = 0;
66fb9763 748
579a97f7 749 frame_addr = get_sigframe(ka, env, sizeof(*frame));
66fb9763 750
579a97f7 751 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
66fb9763 752 goto give_sigsegv;
579a97f7 753
c3b5bc8a 754 err |= __put_user(current_exec_domain_sig(sig),
66fb9763
FB		 755 &frame->sig);
756 if (err)
757 goto give_sigsegv;
758
28be6234
FB		 759 setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
760 frame_addr + offsetof(struct sigframe, fpstate));
66fb9763
FB		 761 if (err)
762 goto give_sigsegv;
763
9231944d
FB		 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 }
66fb9763
FB		 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 {
775b58d8 774 uint16_t val16;
28be6234
FB		 775 abi_ulong retcode_addr;
776 retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
777 err |= __put_user(retcode_addr, &frame->pretcode);
66fb9763 778 /* This is popl %eax ; movl $,%eax ; int $0x80 */
775b58d8
FB		 779 val16 = 0xb858;
780 err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
66fb9763 781 err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
775b58d8
FB		 782 val16 = 0x80cd;
783 err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
66fb9763
FB		 784 }
785
786 if (err)
787 goto give_sigsegv;
788
789 /* Set up registers for signal handler */
28be6234
FB		 790 env->regs[R_ESP] = frame_addr;
791 env->eip = ka->sa._sa_handler;
66fb9763
FB		 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
579a97f7
FB		 799 unlock_user_struct(frame, frame_addr, 1);
800
66fb9763
FB		 801 return;
802
803give_sigsegv:
579a97f7 804 unlock_user_struct(frame, frame_addr, 1);
66fb9763
FB		 805 if (sig == TARGET_SIGSEGV)
806 ka->sa._sa_handler = TARGET_SIG_DFL;
807 force_sig(TARGET_SIGSEGV /* , current */);
808}
809
579a97f7 810/* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
5fafdf24 811static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
9de5e440 812 target_siginfo_t *info,
66fb9763
FB		 813 target_sigset_t *set, CPUX86State *env)
814{
28be6234 815 abi_ulong frame_addr, addr;
66fb9763 816 struct rt_sigframe *frame;
9231944d 817 int i, err = 0;
66fb9763 818
579a97f7 819 frame_addr = get_sigframe(ka, env, sizeof(*frame));
66fb9763 820
579a97f7 821 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
66fb9763 822 goto give_sigsegv;
66fb9763 823
c3b5bc8a 824 err |= __put_user(current_exec_domain_sig(sig),
66fb9763 825 &frame->sig);
28be6234
FB		 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);
66fb9763
FB		 830 err |= copy_siginfo_to_user(&frame->info, info);
831 if (err)
832 goto give_sigsegv;
31e31b8a 833
66fb9763 834 /* Create the ucontext. */
b8076a74
FB		 835 err |= __put_user(0, &frame->uc.tuc_flags);
836 err |= __put_user(0, &frame->uc.tuc_link);
a04e134a 837 err |= __put_user(target_sigaltstack_used.ss_sp,
b8076a74 838 &frame->uc.tuc_stack.ss_sp);
a04e134a 839 err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
b8076a74 840 &frame->uc.tuc_stack.ss_flags);
a04e134a 841 err |= __put_user(target_sigaltstack_used.ss_size,
b8076a74
FB		 842 &frame->uc.tuc_stack.ss_size);
843 err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
28be6234
FB		 844 env, set->sig[0],
845 frame_addr + offsetof(struct rt_sigframe, fpstate));
9231944d 846 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
b8076a74 847 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
9231944d
FB		 848 goto give_sigsegv;
849 }
31e31b8a 850
66fb9763
FB		 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 {
775b58d8 856 uint16_t val16;
28be6234
FB		 857 addr = frame_addr + offsetof(struct rt_sigframe, retcode);
858 err |= __put_user(addr, &frame->pretcode);
66fb9763 859 /* This is movl $,%eax ; int $0x80 */
775b58d8 860 err |= __put_user(0xb8, (char *)(frame->retcode+0));
66fb9763 861 err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
775b58d8
FB		 862 val16 = 0x80cd;
863 err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
66fb9763
FB		 864 }
865
866 if (err)
867 goto give_sigsegv;
868
869 /* Set up registers for signal handler */
28be6234
FB		 870 env->regs[R_ESP] = frame_addr;
871 env->eip = ka->sa._sa_handler;
66fb9763
FB		 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
579a97f7
FB		 879 unlock_user_struct(frame, frame_addr, 1);
880
66fb9763
FB		 881 return;
882
883give_sigsegv:
579a97f7 884 unlock_user_struct(frame, frame_addr, 1);
66fb9763
FB		 885 if (sig == TARGET_SIGSEGV)
886 ka->sa._sa_handler = TARGET_SIG_DFL;
887 force_sig(TARGET_SIGSEGV /* , current */);
888}
889
890static int
891restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax)
892{
893 unsigned int err = 0;
28be6234
FB		 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);
66fb9763
FB		 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);
5fafdf24 913
28be6234
FB		 914 tmpflags = tswapl(sc->eflags);
915 env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
916 // regs->orig_eax = -1; /* disable syscall checks */
66fb9763 917
28be6234
FB		 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);
66fb9763 924 }
ed2dcdf6 925
28be6234 926 *peax = tswapl(sc->eax);
66fb9763 927 return err;
66fb9763
FB		 928badframe:
929 return 1;
66fb9763
FB		 930}
931
932long do_sigreturn(CPUX86State *env)
933{
579a97f7
FB		 934 struct sigframe *frame;
935 abi_ulong frame_addr = env->regs[R_ESP] - 8;
66fb9763
FB		 936 target_sigset_t target_set;
937 sigset_t set;
938 int eax, i;
939
447db213
FB		 940#if defined(DEBUG_SIGNAL)
941 fprintf(stderr, "do_sigreturn\n");
942#endif
579a97f7
FB		 943 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
944 goto badframe;
66fb9763 945 /* set blocked signals */
9231944d
FB		 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 }
66fb9763 952
9231944d 953 target_to_host_sigset_internal(&set, &target_set);
66fb9763 954 sigprocmask(SIG_SETMASK, &set, NULL);
3b46e624 955
66fb9763
FB		 956 /* restore registers */
957 if (restore_sigcontext(env, &frame->sc, &eax))
958 goto badframe;
579a97f7 959 unlock_user_struct(frame, frame_addr, 0);
66fb9763
FB		 960 return eax;
961
962badframe:
579a97f7 963 unlock_user_struct(frame, frame_addr, 0);
66fb9763
FB		 964 force_sig(TARGET_SIGSEGV);
965 return 0;
966}
967
968long do_rt_sigreturn(CPUX86State *env)
969{
28be6234
FB		 970 abi_ulong frame_addr;
971 struct rt_sigframe *frame;
66fb9763 972 sigset_t set;
66fb9763
FB		 973 int eax;
974
28be6234
FB		 975 frame_addr = env->regs[R_ESP] - 4;
976 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
977 goto badframe;
b8076a74 978 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
66fb9763 979 sigprocmask(SIG_SETMASK, &set, NULL);
5fafdf24 980
b8076a74 981 if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
66fb9763
FB		 982 goto badframe;
983
28be6234
FB		 984 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
985 get_sp_from_cpustate(env)) == -EFAULT)
66fb9763 986 goto badframe;
a04e134a 987
28be6234 988 unlock_user_struct(frame, frame_addr, 0);
66fb9763
FB		 989 return eax;
990
991badframe:
28be6234
FB		 992 unlock_user_struct(frame, frame_addr, 0);
993 force_sig(TARGET_SIGSEGV);
66fb9763
FB		 994 return 0;
995}
996
43fff238
FB		 997#elif defined(TARGET_ARM)
998
999struct target_sigcontext {
992f48a0
BS		 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;
43fff238
FB		 1021};
1022
43fff238 1023struct target_ucontext {
992f48a0
BS		 1024 abi_ulong tuc_flags;
1025 abi_ulong tuc_link;
b8076a74
FB		 1026 target_stack_t tuc_stack;
1027 struct target_sigcontext tuc_mcontext;
1028 target_sigset_t tuc_sigmask; /* mask last for extensibility */
43fff238
FB		 1029};
1030
1031struct sigframe
1032{
1033 struct target_sigcontext sc;
992f48a0
BS		 1034 abi_ulong extramask[TARGET_NSIG_WORDS-1];
1035 abi_ulong retcode;
43fff238
FB		 1036};
1037
1038struct rt_sigframe
1039{
f8b0aa25
FB		 1040 abi_ulong pinfo;
1041 abi_ulong puc;
43fff238
FB		 1042 struct target_siginfo info;
1043 struct target_ucontext uc;
992f48a0 1044 abi_ulong retcode;
43fff238
FB		 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
992f48a0 1062static const abi_ulong retcodes[4] = {
43fff238
FB		 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
1071static inline int valid_user_regs(CPUState *regs)
1072{
1073 return 1;
1074}
1075
1076static int
1077setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
f8b0aa25 1078 CPUState *env, abi_ulong mask)
43fff238
FB		 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
b5ff1b31 1099 __put_user_error(cpsr_read(env), &sc->arm_cpsr, err);
43fff238
FB		 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
579a97f7 1110static inline abi_ulong
43fff238
FB		 1111get_sigframe(struct emulated_sigaction *ka, CPUState *regs, int framesize)
1112{
1113 unsigned long sp = regs->regs[13];
1114
43fff238
FB		 1115 /*
1116 * This is the X/Open sanctioned signal stack switching.
1117 */
a04e134a
TS		 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;
43fff238
FB		 1120 /*
1121 * ATPCS B01 mandates 8-byte alignment
1122 */
579a97f7 1123 return (sp - framesize) & ~7;
43fff238
FB		 1124}
1125
1126static int
1127setup_return(CPUState *env, struct emulated_sigaction *ka,
f8b0aa25 1128 abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
43fff238 1129{
f8b0aa25 1130 abi_ulong handler = ka->sa._sa_handler;
992f48a0 1131 abi_ulong retcode;
43fff238
FB		 1132 int thumb = 0;
1133#if defined(TARGET_CONFIG_CPU_32)
b5ff1b31 1134#if 0
992f48a0 1135 abi_ulong cpsr = env->cpsr;
43fff238 1136
43fff238
FB		 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 }
a04e134a
TS		 1156#endif /* CONFIG_ARM_THUMB */
1157#endif /* 0 */
43fff238
FB		 1158#endif /* TARGET_CONFIG_CPU_32 */
1159
1160 if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
f8b0aa25 1161 retcode = ka->sa.sa_restorer;
43fff238
FB		 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
992f48a0
BS		 1171 flush_icache_range((abi_ulong)rc,
1172 (abi_ulong)(rc + 1));
43fff238 1173#endif
f8b0aa25 1174 retcode = rc_addr + thumb;
43fff238
FB		 1175 }
1176
1177 env->regs[0] = usig;
f8b0aa25 1178 env->regs[13] = frame_addr;
43fff238
FB		 1179 env->regs[14] = retcode;
1180 env->regs[15] = handler & (thumb ? ~1 : ~3);
1181
b5ff1b31 1182#if 0
43fff238
FB		 1183#ifdef TARGET_CONFIG_CPU_32
1184 env->cpsr = cpsr;
b5ff1b31 1185#endif
43fff238
FB		 1186#endif
1187
1188 return 0;
1189}
1190
579a97f7 1191/* compare linux/arch/arm/kernel/signal.c:setup_frame() */
43fff238
FB		 1192static void setup_frame(int usig, struct emulated_sigaction *ka,
1193 target_sigset_t *set, CPUState *regs)
1194{
579a97f7
FB		 1195 struct sigframe *frame;
1196 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
9231944d 1197 int i, err = 0;
43fff238 1198
579a97f7
FB		 1199 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1200 return;
1201
43fff238
FB		 1202 err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]);
1203
9231944d
FB		 1204 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1205 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
579a97f7 1206 goto end;
43fff238
FB		 1207 }
1208
1209 if (err == 0)
f8b0aa25
FB		 1210 err = setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1211 frame_addr + offsetof(struct sigframe, retcode));
579a97f7
FB		 1212
1213end:
1214 unlock_user_struct(frame, frame_addr, 1);
43fff238
FB		 1215 // return err;
1216}
1217
579a97f7 1218/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
5fafdf24 1219static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
43fff238
FB		 1220 target_siginfo_t *info,
1221 target_sigset_t *set, CPUState *env)
1222{
579a97f7
FB		 1223 struct rt_sigframe *frame;
1224 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
a04e134a 1225 struct target_sigaltstack stack;
9231944d 1226 int i, err = 0;
f8b0aa25 1227 abi_ulong info_addr, uc_addr;
43fff238 1228
579a97f7 1229 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
edf779ff
FB		 1230 return /* 1 */;
1231
f8b0aa25
FB		 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);
43fff238
FB		 1236 err |= copy_siginfo_to_user(&frame->info, info);
1237
1238 /* Clear all the bits of the ucontext we don't use. */
53a5960a 1239 memset(&frame->uc, 0, offsetof(struct target_ucontext, tuc_mcontext));
43fff238 1240
a04e134a
TS		 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);
775b58d8 1245 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
a04e134a 1246
b8076a74 1247 err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
43fff238 1248 env, set->sig[0]);
9231944d 1249 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
b8076a74 1250 if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
579a97f7 1251 goto end;
9231944d 1252 }
43fff238
FB		 1253
1254 if (err == 0)
f8b0aa25
FB		 1255 err = setup_return(env, ka, &frame->retcode, frame_addr, usig,
1256 frame_addr + offsetof(struct rt_sigframe, retcode));
43fff238
FB		 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 <[email protected]> 2000-12-06
1263 */
f8b0aa25
FB		 1264 env->regs[1] = info_addr;
1265 env->regs[2] = uc_addr;
43fff238
FB		 1266 }
1267
579a97f7
FB		 1268end:
1269 unlock_user_struct(frame, frame_addr, 1);
1270
43fff238
FB		 1271 // return err;
1272}
1273
1274static int
1275restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
1276{
1277 int err = 0;
b5ff1b31 1278 uint32_t cpsr;
43fff238
FB		 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
b5ff1b31
FB		 1297 __get_user_error(cpsr, &sc->arm_cpsr, err);
1298 cpsr_write(env, cpsr, 0xffffffff);
43fff238
FB		 1299#endif
1300
1301 err |= !valid_user_regs(env);
1302
1303 return err;
1304}
1305
1306long do_sigreturn(CPUState *env)
1307{
f8b0aa25 1308 abi_ulong frame_addr;
43fff238
FB		 1309 struct sigframe *frame;
1310 target_sigset_t set;
1311 sigset_t host_set;
9231944d 1312 int i;
43fff238
FB		 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
f8b0aa25
FB		 1322 frame_addr = env->regs[13];
1323 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1324 goto badframe;
43fff238 1325
9231944d
FB		 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 }
43fff238 1332
9231944d 1333 target_to_host_sigset_internal(&host_set, &set);
43fff238
FB		 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
f8b0aa25
FB		 1344 unlock_user_struct(frame, frame_addr, 0);
1345 return env->regs[0];
43fff238
FB		 1346
1347badframe:
f8b0aa25 1348 unlock_user_struct(frame, frame_addr, 0);
43fff238
FB		 1349 force_sig(SIGSEGV /* , current */);
1350 return 0;
1351}
1352
1353long do_rt_sigreturn(CPUState *env)
1354{
f8b0aa25 1355 abi_ulong frame_addr;
43fff238 1356 struct rt_sigframe *frame;
43fff238
FB		 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
f8b0aa25
FB		 1367 frame_addr = env->regs[13];
1368 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1369 goto badframe;
43fff238 1370
b8076a74 1371 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
43fff238
FB		 1372 sigprocmask(SIG_SETMASK, &host_set, NULL);
1373
b8076a74 1374 if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
43fff238
FB		 1375 goto badframe;
1376
f8b0aa25 1377 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
a04e134a
TS		 1378 goto badframe;
1379
43fff238
FB		 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
f8b0aa25 1385 unlock_user_struct(frame, frame_addr, 0);
43fff238
FB		 1386 return env->regs[0];
1387
1388badframe:
f8b0aa25 1389 unlock_user_struct(frame, frame_addr, 0);
43fff238
FB		 1390 force_sig(SIGSEGV /* , current */);
1391 return 0;
1392}
1393
6d5e216d 1394#elif defined(TARGET_SPARC)
80a9d035 1395
6d5e216d
FB		 1396#define __SUNOS_MAXWIN 31
1397
1398/* This is what SunOS does, so shall I. */
1399struct target_sigcontext {
992f48a0 1400 abi_ulong sigc_onstack; /* state to restore */
6d5e216d 1401
992f48a0
BS		 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. */
6d5e216d
FB		 1409
1410 /* Now comes information regarding the users window set
1411 * at the time of the signal.
1412 */
992f48a0 1413 abi_ulong sigc_oswins; /* outstanding windows */
6d5e216d
FB		 1414
1415 /* stack ptrs for each regwin buf */
1416 char *sigc_spbuf[__SUNOS_MAXWIN];
1417
1418 /* Windows to restore after signal */
1419 struct {
992f48a0
BS		 1420 abi_ulong locals[8];
1421 abi_ulong ins[8];
6d5e216d
FB		 1422 } sigc_wbuf[__SUNOS_MAXWIN];
1423};
1424/* A Sparc stack frame */
1425struct sparc_stackf {
992f48a0
BS		 1426 abi_ulong locals[8];
1427 abi_ulong ins[6];
6d5e216d 1428 struct sparc_stackf *fp;
992f48a0 1429 abi_ulong callers_pc;
6d5e216d 1430 char *structptr;
992f48a0
BS		 1431 abi_ulong xargs[6];
1432 abi_ulong xxargs[1];
6d5e216d
FB		 1433};
1434
1435typedef struct {
1436 struct {
992f48a0
BS		 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 */
6d5e216d
FB		 1442 } si_regs;
1443 int si_mask;
1444} __siginfo_t;
1445
1446typedef 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];
74ccb34e 1454} qemu_siginfo_fpu_t;
6d5e216d
FB		 1455
1456
1457struct target_signal_frame {
1458 struct sparc_stackf ss;
1459 __siginfo_t info;
f8b0aa25 1460 abi_ulong fpu_save;
992f48a0
BS		 1461 abi_ulong insns[2] __attribute__ ((aligned (8)));
1462 abi_ulong extramask[TARGET_NSIG_WORDS - 1];
1463 abi_ulong extra_size; /* Should be 0 */
74ccb34e 1464 qemu_siginfo_fpu_t fpu_state;
6d5e216d
FB		 1465};
1466struct target_rt_signal_frame {
1467 struct sparc_stackf ss;
1468 siginfo_t info;
992f48a0 1469 abi_ulong regs[20];
6d5e216d 1470 sigset_t mask;
f8b0aa25 1471 abi_ulong fpu_save;
6d5e216d
FB		 1472 unsigned int insns[2];
1473 stack_t stack;
1474 unsigned int extra_size; /* Should be 0 */
74ccb34e 1475 qemu_siginfo_fpu_t fpu_state;
6d5e216d
FB		 1476};
1477
e80cfcfc
FB		 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
5bfb56b2
BS		 1483#define UREG_I3 3
1484#define UREG_I4 4
1485#define UREG_I5 5
e80cfcfc
FB		 1486#define UREG_I6 6
1487#define UREG_I7 7
1488#define UREG_L0 8
6d5e216d
FB		 1489#define UREG_FP UREG_I6
1490#define UREG_SP UREG_O6
1491
459a4017
FB		 1492static inline abi_ulong get_sigframe(struct emulated_sigaction *sa,
1493 CPUState *env, unsigned long framesize)
6d5e216d 1494{
459a4017 1495 abi_ulong sp;
6d5e216d
FB		 1496
1497 sp = env->regwptr[UREG_FP];
6d5e216d
FB		 1498
1499 /* This is the X/Open sanctioned signal stack switching. */
a04e134a
TS		 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;
6d5e216d 1504 }
459a4017 1505 return sp - framesize;
6d5e216d
FB		 1506}
1507
1508static int
992f48a0 1509setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask)
6d5e216d
FB		 1510{
1511 int err = 0, i;
1512
6d5e216d 1513 err |= __put_user(env->psr, &si->si_regs.psr);
6d5e216d
FB		 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);
a315a145 1517 for (i=0; i < 8; i++) {
6d5e216d
FB		 1518 err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
1519 }
a315a145 1520 for (i=0; i < 8; i++) {
e80cfcfc 1521 err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
6d5e216d 1522 }
6d5e216d
FB		 1523 err |= __put_user(mask, &si->si_mask);
1524 return err;
1525}
e80cfcfc 1526
80a9d035 1527#if 0
6d5e216d
FB		 1528static int
1529setup_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}
80a9d035 1544#endif
6d5e216d
FB		 1545#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
1546
1547static void setup_frame(int sig, struct emulated_sigaction *ka,
1548 target_sigset_t *set, CPUState *env)
1549{
459a4017 1550 abi_ulong sf_addr;
6d5e216d
FB		 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;
459a4017 1558 sf_addr = get_sigframe(ka, env, sigframe_size);
6d5e216d 1559
459a4017
FB		 1560 sf = lock_user(VERIFY_WRITE, sf_addr,
1561 sizeof(struct target_signal_frame), 0);
1562 if (!sf)
1563 goto sigsegv;
1564
e80cfcfc 1565 //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
6d5e216d
FB		 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
a315a145 1582 for (i = 0; i < 8; i++) {
e80cfcfc 1583 err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
6d5e216d 1584 }
a315a145 1585 for (i = 0; i < 8; i++) {
e80cfcfc 1586 err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
6d5e216d 1587 }
6d5e216d
FB		 1588 if (err)
1589 goto sigsegv;
1590
1591 /* 3. signal handler back-trampoline and parameters */
459a4017 1592 env->regwptr[UREG_FP] = sf_addr;
6d5e216d 1593 env->regwptr[UREG_I0] = sig;
459a4017
FB		 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);
6d5e216d
FB		 1598
1599 /* 4. signal handler */
459a4017 1600 env->pc = ka->sa._sa_handler;
6d5e216d
FB		 1601 env->npc = (env->pc + 4);
1602 /* 5. return to kernel instructions */
1603 if (ka->sa.sa_restorer)
459a4017 1604 env->regwptr[UREG_I7] = ka->sa.sa_restorer;
6d5e216d 1605 else {
775b58d8 1606 uint32_t val32;
459a4017
FB		 1607
1608 env->regwptr[UREG_I7] = sf_addr +
1609 offsetof(struct target_signal_frame, insns) - 2 * 4;
6d5e216d
FB		 1610
1611 /* mov __NR_sigreturn, %g1 */
775b58d8
FB		 1612 val32 = 0x821020d8;
1613 err |= __put_user(val32, &sf->insns[0]);
6d5e216d
FB		 1614
1615 /* t 0x10 */
775b58d8
FB		 1616 val32 = 0x91d02010;
1617 err |= __put_user(val32, &sf->insns[1]);
6d5e216d
FB		 1618 if (err)
1619 goto sigsegv;
1620
1621 /* Flush instruction space. */
1622 //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
80a9d035 1623 // tb_flush(env);
6d5e216d 1624 }
459a4017 1625 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
6d5e216d 1626 return;
459a4017
FB		 1627#if 0
1628sigill_and_return:
6d5e216d 1629 force_sig(TARGET_SIGILL);
459a4017 1630#endif
6d5e216d 1631sigsegv:
e80cfcfc 1632 //fprintf(stderr, "force_sig\n");
459a4017 1633 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
6d5e216d
FB		 1634 force_sig(TARGET_SIGSEGV);
1635}
1636static inline int
74ccb34e 1637restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu)
6d5e216d
FB		 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
fafffaef
FB		 1658#if 0
1659 /* XXX: incorrect */
6d5e216d
FB		 1660 err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
1661 (sizeof(unsigned long) * 32));
fafffaef 1662#endif
6d5e216d
FB		 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
5fafdf24 1676static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
6d5e216d
FB		 1677 target_siginfo_t *info,
1678 target_sigset_t *set, CPUState *env)
1679{
1680 fprintf(stderr, "setup_rt_frame: not implemented\n");
1681}
1682
1683long do_sigreturn(CPUState *env)
1684{
f8b0aa25 1685 abi_ulong sf_addr;
6d5e216d 1686 struct target_signal_frame *sf;
e80cfcfc 1687 uint32_t up_psr, pc, npc;
6d5e216d 1688 target_sigset_t set;
e80cfcfc 1689 sigset_t host_set;
f8b0aa25 1690 abi_ulong fpu_save_addr;
e80cfcfc 1691 int err, i;
6d5e216d 1692
f8b0aa25
FB		 1693 sf_addr = env->regwptr[UREG_FP];
1694 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1))
1695 goto segv_and_exit;
80a9d035 1696#if 0
e80cfcfc
FB		 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]);
80a9d035 1699#endif
e80cfcfc 1700 //cpu_dump_state(env, stderr, fprintf, 0);
6d5e216d
FB		 1701
1702 /* 1. Make sure we are not getting garbage from the user */
6d5e216d 1703
f8b0aa25 1704 if (sf_addr & 3)
6d5e216d
FB		 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
6d5e216d
FB		 1710 if ((pc | npc) & 3)
1711 goto segv_and_exit;
1712
1713 /* 2. Restore the state */
e80cfcfc
FB		 1714 err |= __get_user(up_psr, &sf->info.si_regs.psr);
1715
6d5e216d 1716 /* User can only change condition codes and FPU enabling in %psr. */
a315a145
FB		 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;
e80cfcfc 1722 err |= __get_user(env->y, &sf->info.si_regs.y);
a315a145 1723 for (i=0; i < 8; i++) {
e80cfcfc
FB		 1724 err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
1725 }
a315a145 1726 for (i=0; i < 8; i++) {
e80cfcfc
FB		 1727 err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
1728 }
6d5e216d 1729
f8b0aa25 1730 err |= __get_user(fpu_save_addr, &sf->fpu_save);
6d5e216d 1731
e80cfcfc
FB		 1732 //if (fpu_save)
1733 // err |= restore_fpu_state(env, fpu_save);
6d5e216d
FB		 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);
e80cfcfc
FB		 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);
6d5e216d
FB		 1745
1746 if (err)
1747 goto segv_and_exit;
f8b0aa25 1748 unlock_user_struct(sf, sf_addr, 0);
6d5e216d
FB		 1749 return env->regwptr[0];
1750
1751segv_and_exit:
f8b0aa25 1752 unlock_user_struct(sf, sf_addr, 0);
6d5e216d
FB		 1753 force_sig(TARGET_SIGSEGV);
1754}
1755
1756long do_rt_sigreturn(CPUState *env)
1757{
1758 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
f8b0aa25 1759 return -TARGET_ENOSYS;
6d5e216d
FB		 1760}
1761
459a4017 1762#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
5bfb56b2
BS		 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
992f48a0 1784typedef abi_ulong target_mc_greg_t;
5bfb56b2
BS		 1785typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
1786
1787struct target_mc_fq {
992f48a0 1788 abi_ulong *mcfq_addr;
5bfb56b2
BS		 1789 uint32_t mcfq_insn;
1790};
1791
1792struct target_mc_fpu {
1793 union {
1794 uint32_t sregs[32];
1795 uint64_t dregs[32];
1796 //uint128_t qregs[16];
1797 } mcfpu_fregs;
992f48a0
BS		 1798 abi_ulong mcfpu_fsr;
1799 abi_ulong mcfpu_fprs;
1800 abi_ulong mcfpu_gsr;
5bfb56b2
BS		 1801 struct target_mc_fq *mcfpu_fq;
1802 unsigned char mcfpu_qcnt;
1803 unsigned char mcfpu_qentsz;
1804 unsigned char mcfpu_enab;
1805};
1806typedef struct target_mc_fpu target_mc_fpu_t;
1807
1808typedef 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
1815struct target_ucontext {
1816 struct target_ucontext *uc_link;
992f48a0 1817 abi_ulong uc_flags;
5bfb56b2
BS		 1818 target_sigset_t uc_sigmask;
1819 target_mcontext_t uc_mcontext;
1820};
1821
1822/* A V9 register window */
1823struct target_reg_window {
992f48a0
BS		 1824 abi_ulong locals[8];
1825 abi_ulong ins[8];
5bfb56b2
BS		 1826};
1827
1828#define TARGET_STACK_BIAS 2047
1829
1830/* {set, get}context() needed for 64-bit SparcLinux userland. */
1831void sparc64_set_context(CPUSPARCState *env)
1832{
459a4017
FB		 1833 abi_ulong ucp_addr;
1834 struct target_ucontext *ucp;
5bfb56b2 1835 target_mc_gregset_t *grp;
992f48a0 1836 abi_ulong pc, npc, tstate;
459a4017 1837 abi_ulong fp, i7, w_addr;
5bfb56b2
BS		 1838 unsigned char fenab;
1839 int err;
1840 unsigned int i;
5bfb56b2 1841
459a4017
FB		 1842 ucp_addr = env->regwptr[UREG_I0];
1843 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1))
1844 goto do_sigsegv;
5bfb56b2 1845 grp = &ucp->uc_mcontext.mc_gregs;
579a97f7
FB		 1846 err = __get_user(pc, &((*grp)[MC_PC]));
1847 err |= __get_user(npc, &((*grp)[MC_NPC]));
5bfb56b2
BS		 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) {
579a97f7 1855 if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0]))
5bfb56b2
BS		 1856 goto do_sigsegv;
1857 } else {
459a4017
FB		 1858 abi_ulong *src, *dst;
1859 src = ucp->uc_sigmask.sig;
1860 dst = target_set.sig;
992f48a0 1861 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
5bfb56b2 1862 i++, dst++, src++)
459a4017 1863 err |= __get_user(*dst, src);
5bfb56b2
BS		 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;
579a97f7
FB		 1872 err |= __get_user(env->y, &((*grp)[MC_Y]));
1873 err |= __get_user(tstate, &((*grp)[MC_TSTATE]));
5bfb56b2
BS		 1874 env->asi = (tstate >> 24) & 0xff;
1875 PUT_CCR(env, tstate >> 32);
1876 PUT_CWP64(env, tstate & 0x1f);
579a97f7
FB		 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));
579a97f7 1895
459a4017
FB		 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;
579a97f7
FB		 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));
459a4017
FB		 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 }
579a97f7
FB		 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));
5bfb56b2
BS		 1917 if (err)
1918 goto do_sigsegv;
459a4017 1919 unlock_user_struct(ucp, ucp_addr, 0);
5bfb56b2
BS		 1920 return;
1921 do_sigsegv:
459a4017 1922 unlock_user_struct(ucp, ucp_addr, 0);
5bfb56b2
BS		 1923 force_sig(SIGSEGV);
1924}
1925
1926void sparc64_get_context(CPUSPARCState *env)
1927{
459a4017
FB		 1928 abi_ulong ucp_addr;
1929 struct target_ucontext *ucp;
5bfb56b2
BS		 1930 target_mc_gregset_t *grp;
1931 target_mcontext_t *mcp;
459a4017 1932 abi_ulong fp, i7, w_addr;
5bfb56b2
BS		 1933 int err;
1934 unsigned int i;
5bfb56b2
BS		 1935 target_sigset_t target_set;
1936 sigset_t set;
1937
459a4017
FB		 1938 ucp_addr = env->regwptr[UREG_I0];
1939 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0))
1940 goto do_sigsegv;
1941
5bfb56b2
BS		 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);
459a4017 1953 if (TARGET_NSIG_WORDS == 1) {
579a97f7
FB		 1954 err |= __put_user(target_set.sig[0],
1955 (abi_ulong *)&ucp->uc_sigmask);
459a4017
FB		 1956 } else {
1957 abi_ulong *src, *dst;
1958 src = target_set.sig;
1959 dst = ucp->uc_sigmask.sig;
992f48a0 1960 for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong);
5bfb56b2 1961 i++, dst++, src++)
459a4017 1962 err |= __put_user(*src, dst);
5bfb56b2
BS		 1963 if (err)
1964 goto do_sigsegv;
1965 }
1966
459a4017
FB		 1967 /* XXX: tstate must be saved properly */
1968 // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
579a97f7
FB		 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
459a4017
FB		 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;
579a97f7
FB		 1996 err |= __put_user(fp, &(mcp->mc_fp));
1997 err |= __put_user(i7, &(mcp->mc_i7));
5bfb56b2 1998
459a4017
FB		 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 }
579a97f7
FB		 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));
5bfb56b2
BS		 2010
2011 if (err)
2012 goto do_sigsegv;
459a4017 2013 unlock_user_struct(ucp, ucp_addr, 1);
5bfb56b2
BS		 2014 return;
2015 do_sigsegv:
459a4017 2016 unlock_user_struct(ucp, ucp_addr, 1);
5bfb56b2
BS		 2017 force_sig(SIGSEGV);
2018}
2019#endif
d26bc211 2020#elif defined(TARGET_ABI_MIPSN64)
540635ba
TS		 2021
2022# warning signal handling not implemented
2023
2024static 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
2030static 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
2037long do_sigreturn(CPUState *env)
2038{
2039 fprintf(stderr, "do_sigreturn: not implemented\n");
f8b0aa25 2040 return -TARGET_ENOSYS;
540635ba
TS		 2041}
2042
2043long do_rt_sigreturn(CPUState *env)
2044{
2045 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
f8b0aa25 2046 return -TARGET_ENOSYS;
540635ba
TS		 2047}
2048
d26bc211 2049#elif defined(TARGET_ABI_MIPSN32)
540635ba
TS		 2050
2051# warning signal handling not implemented
2052
2053static 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
2059static 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
2066long do_sigreturn(CPUState *env)
2067{
2068 fprintf(stderr, "do_sigreturn: not implemented\n");
f8b0aa25 2069 return -TARGET_ENOSYS;
540635ba
TS		 2070}
2071
2072long do_rt_sigreturn(CPUState *env)
2073{
2074 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
f8b0aa25 2075 return -TARGET_ENOSYS;
540635ba
TS		 2076}
2077
d26bc211 2078#elif defined(TARGET_ABI_MIPSO32)
106ec879
FB		 2079
2080struct 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
2101struct 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 */
2109static 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
2126static inline int
2127setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2128{
2129 int err = 0;
2130
ead9360e 2131 err |= __put_user(regs->PC[regs->current_tc], &sc->sc_pc);
106ec879 2132
ead9360e 2133#define save_gp_reg(i) do { \
d0dc7dc3 2134 err |= __put_user(regs->gpr[regs->current_tc][i], &sc->sc_regs[i]); \
106ec879
FB		 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);
388bb21a 2145#undef save_gp_reg
106ec879 2146
d0dc7dc3
TS		 2147 err |= __put_user(regs->HI[regs->current_tc][0], &sc->sc_mdhi);
2148 err |= __put_user(regs->LO[regs->current_tc][0], &sc->sc_mdlo);
106ec879
FB		 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 */
388bb21a 2162#ifdef CONFIG_64BIT
106ec879
FB		 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 }
388bb21a
TS		 2174#endif
2175#endif
106ec879 2176
388bb21a 2177#if 0
106ec879
FB		 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
2201static inline int
2202restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
2203{
2204 int err = 0;
2205
2206 err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
2207
d0dc7dc3
TS		 2208 err |= __get_user(regs->HI[regs->current_tc][0], &sc->sc_mdhi);
2209 err |= __get_user(regs->LO[regs->current_tc][0], &sc->sc_mdlo);
106ec879 2210
ead9360e 2211#define restore_gp_reg(i) do { \
d0dc7dc3 2212 err |= __get_user(regs->gpr[regs->current_tc][i], &sc->sc_regs[i]); \
106ec879
FB		 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);
388bb21a 2225#undef restore_gp_reg
106ec879
FB		 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 }
388bb21a 2237#ifdef CONFIG_64BIT
106ec879
FB		 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 }
388bb21a 2249#endif
106ec879
FB		 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 */
579a97f7 2272static inline abi_ulong
106ec879
FB		 2273get_sigframe(struct emulated_sigaction *ka, CPUState *regs, size_t frame_size)
2274{
2275 unsigned long sp;
2276
2277 /* Default to using normal stack */
d0dc7dc3 2278 sp = regs->gpr[regs->current_tc][29];
106ec879
FB		 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
106ec879 2287 /* This is the X/Open sanctioned signal stack switching. */
a04e134a
TS		 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 }
106ec879 2291
579a97f7 2292 return (sp - frame_size) & ~7;
106ec879
FB		 2293}
2294
579a97f7 2295/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
5fafdf24 2296static void setup_frame(int sig, struct emulated_sigaction * ka,
579a97f7 2297 target_sigset_t *set, CPUState *regs)
106ec879
FB		 2298{
2299 struct sigframe *frame;
579a97f7 2300 abi_ulong frame_addr;
106ec879
FB		 2301 int i;
2302
579a97f7
FB		 2303 frame_addr = get_sigframe(ka, regs, sizeof(*frame));
2304 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
106ec879
FB		 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 */
d0dc7dc3
TS		 2327 regs->gpr[regs->current_tc][ 4] = sig;
2328 regs->gpr[regs->current_tc][ 5] = 0;
2329 regs->gpr[regs->current_tc][ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
2330 regs->gpr[regs->current_tc][29] = frame_addr;
2331 regs->gpr[regs->current_tc][31] = frame_addr + offsetof(struct sigframe, sf_code);
106ec879
FB		 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 */
d0dc7dc3 2335 regs->PC[regs->current_tc] = regs->gpr[regs->current_tc][25] = ka->sa._sa_handler;
579a97f7 2336 unlock_user_struct(frame, frame_addr, 1);
106ec879
FB		 2337 return;
2338
2339give_sigsegv:
579a97f7 2340 unlock_user_struct(frame, frame_addr, 1);
106ec879 2341 force_sig(TARGET_SIGSEGV/*, current*/);
5fafdf24 2342 return;
106ec879
FB		 2343}
2344
2345long do_sigreturn(CPUState *regs)
2346{
388bb21a 2347 struct sigframe *frame;
579a97f7 2348 abi_ulong frame_addr;
388bb21a
TS		 2349 sigset_t blocked;
2350 target_sigset_t target_set;
2351 int i;
106ec879
FB		 2352
2353#if defined(DEBUG_SIGNAL)
388bb21a 2354 fprintf(stderr, "do_sigreturn\n");
106ec879 2355#endif
d0dc7dc3 2356 frame_addr = regs->gpr[regs->current_tc][29];
579a97f7 2357 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
106ec879
FB		 2358 goto badframe;
2359
388bb21a 2360 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
106ec879
FB		 2361 if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
2362 goto badframe;
388bb21a 2363 }
106ec879 2364
388bb21a
TS		 2365 target_to_host_sigset_internal(&blocked, &target_set);
2366 sigprocmask(SIG_SETMASK, &blocked, NULL);
106ec879 2367
388bb21a 2368 if (restore_sigcontext(regs, &frame->sf_sc))
106ec879
FB		 2369 goto badframe;
2370
2371#if 0
388bb21a
TS		 2372 /*
2373 * Don't let your children do this ...
2374 */
2375 __asm__ __volatile__(
106ec879
FB		 2376 "move\t$29, %0\n\t"
2377 "j\tsyscall_exit"
2378 :/* no outputs */
2379 :"r" (&regs));
388bb21a 2380 /* Unreached */
106ec879 2381#endif
3b46e624 2382
ead9360e 2383 regs->PC[regs->current_tc] = regs->CP0_EPC;
388bb21a 2384 /* I am not sure this is right, but it seems to work
106ec879
FB		 2385 * maybe a problem with nested signals ? */
2386 regs->CP0_EPC = 0;
2387 return 0;
2388
2389badframe:
388bb21a
TS		 2390 force_sig(TARGET_SIGSEGV/*, current*/);
2391 return 0;
106ec879
FB		 2392}
2393
5fafdf24 2394static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
106ec879
FB		 2395 target_siginfo_t *info,
2396 target_sigset_t *set, CPUState *env)
2397{
2398 fprintf(stderr, "setup_rt_frame: not implemented\n");
2399}
2400
2401long do_rt_sigreturn(CPUState *env)
2402{
2403 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
f8b0aa25 2404 return -TARGET_ENOSYS;
106ec879 2405}
6d5e216d 2406
c3b5bc8a
TS		 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
2415struct 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
2435struct target_sigframe
2436{
2437 struct target_sigcontext sc;
2438 target_ulong extramask[TARGET_NSIG_WORDS-1];
2439 uint16_t retcode[3];
2440};
2441
2442
2443struct 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
2451struct 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
2462static 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
2472static 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
2499static 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
2524static 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
2570give_sigsegv:
2571 unlock_user_struct(frame, frame_addr, 1);
2572 force_sig(SIGSEGV);
2573}
2574
2575static 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
2633give_sigsegv:
2634 unlock_user_struct(frame, frame_addr, 1);
2635 force_sig(SIGSEGV);
2636}
2637
2638long 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
2671badframe:
2672 unlock_user_struct(frame, frame_addr, 0);
2673 force_sig(TARGET_SIGSEGV);
2674 return 0;
2675}
2676
2677long 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
2704badframe:
2705 unlock_user_struct(frame, frame_addr, 0);
2706 force_sig(TARGET_SIGSEGV);
2707 return 0;
2708}
b6d3abda
EI		 2709#elif defined(TARGET_CRIS)
2710
2711struct target_sigcontext {
2712 struct target_pt_regs regs; /* needs to be first */
2713 uint32_t oldmask;
2714 uint32_t usp; /* usp before stacking this gunk on it */
2715};
2716
2717/* Signal frames. */
2718struct target_signal_frame {
2719 struct target_sigcontext sc;
2720 uint32_t extramask[TARGET_NSIG_WORDS - 1];
2721 uint8_t retcode[8]; /* Trampoline code. */
2722};
2723
2724struct rt_signal_frame {
2725 struct siginfo *pinfo;
2726 void *puc;
2727 struct siginfo info;
2728 struct ucontext uc;
2729 uint8_t retcode[8]; /* Trampoline code. */
2730};
2731
2732static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env)
2733{
2734 sc->regs.r0 = env->regs[0];
2735 sc->regs.r1 = env->regs[1];
2736 sc->regs.r2 = env->regs[2];
2737 sc->regs.r3 = env->regs[3];
2738 sc->regs.r4 = env->regs[4];
2739 sc->regs.r5 = env->regs[5];
2740 sc->regs.r6 = env->regs[6];
2741 sc->regs.r7 = env->regs[7];
2742 sc->regs.r8 = env->regs[8];
2743 sc->regs.r9 = env->regs[9];
2744 sc->regs.r10 = env->regs[10];
2745 sc->regs.r11 = env->regs[11];
2746 sc->regs.r12 = env->regs[12];
2747 sc->regs.r13 = env->regs[13];
2748 sc->usp = env->regs[14];
2749 sc->regs.acr = env->regs[15];
2750 sc->regs.srp = env->pregs[PR_SRP];
2751 sc->regs.erp = env->pc;
2752
2753 env->pregs[PR_ERP] = env->pc;
2754}
2755static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env)
2756{
2757 env->regs[0] = sc->regs.r0;
2758 env->regs[1] = sc->regs.r1;
2759 env->regs[2] = sc->regs.r2;
2760 env->regs[3] = sc->regs.r3;
2761 env->regs[4] = sc->regs.r4;
2762 env->regs[5] = sc->regs.r5;
2763 env->regs[6] = sc->regs.r6;
2764 env->regs[7] = sc->regs.r7;
2765 env->regs[8] = sc->regs.r8;
2766 env->regs[9] = sc->regs.r9;
2767 env->regs[10] = sc->regs.r10;
2768 env->regs[11] = sc->regs.r11;
2769 env->regs[12] = sc->regs.r12;
2770 env->regs[13] = sc->regs.r13;
2771 env->regs[14] = sc->usp;
2772 env->regs[15] = sc->regs.acr;
2773}
2774
2775static struct target_signal_frame *get_sigframe(CPUState *env, int framesize)
2776{
2777 uint8_t *sp;
2778 /* Align the stack downwards to 4. */
2779 sp = (uint8_t *) (env->regs[R_SP] & ~3);
2780 return (void *)(sp - framesize);
2781}
2782
2783static void setup_frame(int sig, struct emulated_sigaction *ka,
2784 target_sigset_t *set, CPUState *env)
2785{
2786 struct target_signal_frame *frame;
2787 int err = 0;
2788 int i;
2789 uint32_t old_usp;
2790
2791 old_usp = env->regs[R_SP];
2792
2793 frame = get_sigframe(env, sizeof *frame);
2794 if (!lock_user_struct(VERIFY_WRITE, frame, (abi_ulong)frame, 1))
2795 goto badframe;
2796
2797 /*
2798 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
2799 * use this trampoline anymore but it sets it up for GDB.
2800 * In QEMU, using the trampoline simplifies things a bit so we use it.
2801 *
2802 * This is movu.w __NR_sigreturn, r9; break 13;
2803 */
2804 err |= __put_user(0x9c5f, frame->retcode+0);
2805 err |= __put_user(TARGET_NR_sigreturn,
2806 frame->retcode+2);
2807 err |= __put_user(0xe93d, frame->retcode+4);
2808
2809 /* Save the mask. */
2810 err |= __put_user(set->sig[0], &frame->sc.oldmask);
2811 if (err)
2812 goto badframe;
2813
2814 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2815 if (__put_user(set->sig[i], &frame->extramask[i - 1]))
2816 goto badframe;
2817 }
2818
2819 setup_sigcontext(&frame->sc, env);
2820
2821 /* Move the stack and setup the arguments for the handler. */
2822 env->regs[R_SP] = (uint32_t) frame;
2823 env->regs[10] = sig;
2824 env->pc = (unsigned long) ka->sa._sa_handler;
2825 /* Link SRP so the guest returns through the trampoline. */
2826 env->pregs[PR_SRP] = (uint32_t) &frame->retcode[0];
2827
2828 unlock_user_struct(frame, (abi_ulong)frame, 0);
2829 return;
2830 badframe:
2831 unlock_user_struct(frame, (abi_ulong)frame, 0);
2832 force_sig(TARGET_SIGSEGV);
2833}
2834
2835static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
2836 target_siginfo_t *info,
2837 target_sigset_t *set, CPUState *env)
2838{
2839 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
2840}
2841
2842long do_sigreturn(CPUState *env)
2843{
2844 struct target_signal_frame *frame;
2845 target_sigset_t target_set;
2846 sigset_t set;
2847 int i;
2848
2849 frame = (void *) env->regs[R_SP];
2850 /* Make sure the guest isn't playing games. */
2851 if (!lock_user_struct(VERIFY_READ, frame, (abi_ulong)frame, 1))
2852 goto badframe;
2853
2854 /* Restore blocked signals */
2855 if (__get_user(target_set.sig[0], &frame->sc.oldmask))
2856 goto badframe;
2857 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2858 if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
2859 goto badframe;
2860 }
2861 target_to_host_sigset_internal(&set, &target_set);
2862 sigprocmask(SIG_SETMASK, &set, NULL);
2863
2864 restore_sigcontext(&frame->sc, env);
2865 /* Compensate -2 for the syscall return path advancing brk. */
2866 env->pc = frame->sc.regs.erp - 2;
2867 env->pregs[PR_SRP] = frame->sc.regs.srp;
2868
2869 unlock_user_struct(frame, (abi_ulong)frame, 0);
2870 return env->regs[10];
2871 badframe:
2872 unlock_user_struct(frame, (abi_ulong)frame, 0);
2873 force_sig(TARGET_SIGSEGV);
2874}
2875
2876long do_rt_sigreturn(CPUState *env)
2877{
2878 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
2879 return -TARGET_ENOSYS;
2880}
c3b5bc8a 2881
b346ff46
FB		 2882#else
2883
2884static void setup_frame(int sig, struct emulated_sigaction *ka,
2885 target_sigset_t *set, CPUState *env)
2886{
2887 fprintf(stderr, "setup_frame: not implemented\n");
2888}
2889
5fafdf24 2890static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
b346ff46
FB		 2891 target_siginfo_t *info,
2892 target_sigset_t *set, CPUState *env)
2893{
2894 fprintf(stderr, "setup_rt_frame: not implemented\n");
2895}
2896
2897long do_sigreturn(CPUState *env)
2898{
2899 fprintf(stderr, "do_sigreturn: not implemented\n");
f8b0aa25 2900 return -TARGET_ENOSYS;
b346ff46
FB		 2901}
2902
2903long do_rt_sigreturn(CPUState *env)
2904{
2905 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
f8b0aa25 2906 return -TARGET_ENOSYS;
b346ff46
FB		 2907}
2908
66fb9763
FB		 2909#endif
2910
2911void process_pending_signals(void *cpu_env)
2912{
2913 int sig;
992f48a0 2914 abi_ulong handler;
9de5e440
FB		 2915 sigset_t set, old_set;
2916 target_sigset_t target_old_set;
66fb9763
FB		 2917 struct emulated_sigaction *k;
2918 struct sigqueue *q;
3b46e624 2919
31e31b8a
FB		 2920 if (!signal_pending)
2921 return;
2922
66fb9763
FB		 2923 k = sigact_table;
2924 for(sig = 1; sig <= TARGET_NSIG; sig++) {
2925 if (k->pending)
31e31b8a 2926 goto handle_signal;
66fb9763 2927 k++;
31e31b8a
FB		 2928 }
2929 /* if no signal is pending, just return */
2930 signal_pending = 0;
2931 return;
66fb9763 2932
31e31b8a 2933 handle_signal:
66fb9763 2934#ifdef DEBUG_SIGNAL
bc8a22cc 2935 fprintf(stderr, "qemu: process signal %d\n", sig);
66fb9763
FB		 2936#endif
2937 /* dequeue signal */
2938 q = k->first;
2939 k->first = q->next;
2940 if (!k->first)
2941 k->pending = 0;
3b46e624 2942
1fddef4b
FB		 2943 sig = gdb_handlesig (cpu_env, sig);
2944 if (!sig) {
2945 fprintf (stderr, "Lost signal\n");
2946 abort();
2947 }
66fb9763
FB		 2948
2949 handler = k->sa._sa_handler;
2950 if (handler == TARGET_SIG_DFL) {
2951 /* default handler : ignore some signal. The other are fatal */
5fafdf24
TS		 2952 if (sig != TARGET_SIGCHLD &&
2953 sig != TARGET_SIGURG &&
66fb9763
FB		 2954 sig != TARGET_SIGWINCH) {
2955 force_sig(sig);
2956 }
2957 } else if (handler == TARGET_SIG_IGN) {
2958 /* ignore sig */
2959 } else if (handler == TARGET_SIG_ERR) {
2960 force_sig(sig);
2961 } else {
9de5e440
FB		 2962 /* compute the blocked signals during the handler execution */
2963 target_to_host_sigset(&set, &k->sa.sa_mask);
2964 /* SA_NODEFER indicates that the current signal should not be
2965 blocked during the handler */
2966 if (!(k->sa.sa_flags & TARGET_SA_NODEFER))
2967 sigaddset(&set, target_to_host_signal(sig));
3b46e624 2968
9de5e440
FB		 2969 /* block signals in the handler using Linux */
2970 sigprocmask(SIG_BLOCK, &set, &old_set);
2971 /* save the previous blocked signal state to restore it at the
2972 end of the signal execution (see do_sigreturn) */
9231944d 2973 host_to_target_sigset_internal(&target_old_set, &old_set);
9de5e440 2974
bc8a22cc 2975 /* if the CPU is in VM86 mode, we restore the 32 bit values */
84409ddb 2976#if defined(TARGET_I386) && !defined(TARGET_X86_64)
bc8a22cc
FB		 2977 {
2978 CPUX86State *env = cpu_env;
2979 if (env->eflags & VM_MASK)
2980 save_v86_state(env);
2981 }
2982#endif
9de5e440 2983 /* prepare the stack frame of the virtual CPU */
66fb9763 2984 if (k->sa.sa_flags & TARGET_SA_SIGINFO)
9de5e440 2985 setup_rt_frame(sig, k, &q->info, &target_old_set, cpu_env);
66fb9763 2986 else
9de5e440 2987 setup_frame(sig, k, &target_old_set, cpu_env);
66fb9763
FB		 2988 if (k->sa.sa_flags & TARGET_SA_RESETHAND)
2989 k->sa._sa_handler = TARGET_SIG_DFL;
31e31b8a 2990 }
66fb9763
FB		 2991 if (q != &k->info)
2992 free_sigqueue(q);
2993}
Empty description
This page took 0.572713 seconds and 4 git commands to generate.