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linux-user: Add HPPA target_syscall.h
[mirror_qemu.git] / linux-user / signal.c
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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
8167ee88 17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
31e31b8a 18 */
d39594e9 19#include "qemu/osdep.h"
a70dadc7 20#include "qemu/bitops.h"
31e31b8a 21#include <sys/ucontext.h>
edf8e2af 22#include <sys/resource.h>
31e31b8a 23
3ef693a0 24#include "qemu.h"
7d99a001 25#include "qemu-common.h"
992f48a0 26#include "target_signal.h"
c8ee0a44 27#include "trace.h"
66fb9763 28
249c4c32 29static struct target_sigaltstack target_sigaltstack_used = {
a04e134a
TS		 30 .ss_sp = 0,
31 .ss_size = 0,
32 .ss_flags = TARGET_SS_DISABLE,
33};
34
624f7979 35static struct target_sigaction sigact_table[TARGET_NSIG];
31e31b8a 36
5fafdf24 37static void host_signal_handler(int host_signum, siginfo_t *info,
66fb9763
FB		 38 void *puc);
39
3ca05588 40static uint8_t host_to_target_signal_table[_NSIG] = {
9e5f5284
FB		 41 [SIGHUP] = TARGET_SIGHUP,
42 [SIGINT] = TARGET_SIGINT,
43 [SIGQUIT] = TARGET_SIGQUIT,
44 [SIGILL] = TARGET_SIGILL,
45 [SIGTRAP] = TARGET_SIGTRAP,
46 [SIGABRT] = TARGET_SIGABRT,
01e3b763 47/* [SIGIOT] = TARGET_SIGIOT,*/
9e5f5284
FB		 48 [SIGBUS] = TARGET_SIGBUS,
49 [SIGFPE] = TARGET_SIGFPE,
50 [SIGKILL] = TARGET_SIGKILL,
51 [SIGUSR1] = TARGET_SIGUSR1,
52 [SIGSEGV] = TARGET_SIGSEGV,
53 [SIGUSR2] = TARGET_SIGUSR2,
54 [SIGPIPE] = TARGET_SIGPIPE,
55 [SIGALRM] = TARGET_SIGALRM,
56 [SIGTERM] = TARGET_SIGTERM,
57#ifdef SIGSTKFLT
58 [SIGSTKFLT] = TARGET_SIGSTKFLT,
59#endif
60 [SIGCHLD] = TARGET_SIGCHLD,
61 [SIGCONT] = TARGET_SIGCONT,
62 [SIGSTOP] = TARGET_SIGSTOP,
63 [SIGTSTP] = TARGET_SIGTSTP,
64 [SIGTTIN] = TARGET_SIGTTIN,
65 [SIGTTOU] = TARGET_SIGTTOU,
66 [SIGURG] = TARGET_SIGURG,
67 [SIGXCPU] = TARGET_SIGXCPU,
68 [SIGXFSZ] = TARGET_SIGXFSZ,
69 [SIGVTALRM] = TARGET_SIGVTALRM,
70 [SIGPROF] = TARGET_SIGPROF,
71 [SIGWINCH] = TARGET_SIGWINCH,
72 [SIGIO] = TARGET_SIGIO,
73 [SIGPWR] = TARGET_SIGPWR,
74 [SIGSYS] = TARGET_SIGSYS,
75 /* next signals stay the same */
624f7979 76 /* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with
b4916d7b 77 host libpthread signals. This assumes no one actually uses SIGRTMAX :-/
624f7979
PB		 78 To fix this properly we need to do manual signal delivery multiplexed
79 over a single host signal. */
80 [__SIGRTMIN] = __SIGRTMAX,
81 [__SIGRTMAX] = __SIGRTMIN,
9e5f5284 82};
3ca05588 83static uint8_t target_to_host_signal_table[_NSIG];
9e5f5284 84
a04e134a
TS		 85static inline int on_sig_stack(unsigned long sp)
86{
87 return (sp - target_sigaltstack_used.ss_sp
88 < target_sigaltstack_used.ss_size);
89}
90
91static inline int sas_ss_flags(unsigned long sp)
92{
93 return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE
94 : on_sig_stack(sp) ? SS_ONSTACK : 0);
95}
96
1d9d8b55 97int host_to_target_signal(int sig)
31e31b8a 98{
167c50d8 99 if (sig < 0 || sig >= _NSIG)
4cb05961 100 return sig;
9e5f5284 101 return host_to_target_signal_table[sig];
31e31b8a
FB		 102}
103
4cb05961 104int target_to_host_signal(int sig)
31e31b8a 105{
167c50d8 106 if (sig < 0 || sig >= _NSIG)
4cb05961 107 return sig;
9e5f5284 108 return target_to_host_signal_table[sig];
31e31b8a
FB		 109}
110
c227f099 111static inline void target_sigemptyset(target_sigset_t *set)
f5545b5c
PB		 112{
113 memset(set, 0, sizeof(*set));
114}
115
c227f099 116static inline void target_sigaddset(target_sigset_t *set, int signum)
f5545b5c
PB		 117{
118 signum--;
119 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
120 set->sig[signum / TARGET_NSIG_BPW] |= mask;
121}
122
c227f099 123static inline int target_sigismember(const target_sigset_t *set, int signum)
f5545b5c
PB		 124{
125 signum--;
126 abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
127 return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0);
128}
129
c227f099 130static void host_to_target_sigset_internal(target_sigset_t *d,
9231944d 131 const sigset_t *s)
66fb9763
FB		 132{
133 int i;
f5545b5c
PB		 134 target_sigemptyset(d);
135 for (i = 1; i <= TARGET_NSIG; i++) {
136 if (sigismember(s, i)) {
137 target_sigaddset(d, host_to_target_signal(i));
138 }
66fb9763
FB		 139 }
140}
141
c227f099 142void host_to_target_sigset(target_sigset_t *d, const sigset_t *s)
9231944d 143{
c227f099 144 target_sigset_t d1;
9231944d
FB		 145 int i;
146
147 host_to_target_sigset_internal(&d1, s);
148 for(i = 0;i < TARGET_NSIG_WORDS; i++)
cbb21eed 149 d->sig[i] = tswapal(d1.sig[i]);
9231944d
FB		 150}
151
8fcd3692 152static void target_to_host_sigset_internal(sigset_t *d,
c227f099 153 const target_sigset_t *s)
66fb9763
FB		 154{
155 int i;
f5545b5c
PB		 156 sigemptyset(d);
157 for (i = 1; i <= TARGET_NSIG; i++) {
158 if (target_sigismember(s, i)) {
159 sigaddset(d, target_to_host_signal(i));
160 }
da7c8647 161 }
66fb9763
FB		 162}
163
c227f099 164void target_to_host_sigset(sigset_t *d, const target_sigset_t *s)
9231944d 165{
c227f099 166 target_sigset_t s1;
9231944d
FB		 167 int i;
168
169 for(i = 0;i < TARGET_NSIG_WORDS; i++)
cbb21eed 170 s1.sig[i] = tswapal(s->sig[i]);
9231944d
FB		 171 target_to_host_sigset_internal(d, &s1);
172}
3b46e624 173
992f48a0 174void host_to_target_old_sigset(abi_ulong *old_sigset,
66fb9763
FB		 175 const sigset_t *sigset)
176{
c227f099 177 target_sigset_t d;
9e5f5284
FB		 178 host_to_target_sigset(&d, sigset);
179 *old_sigset = d.sig[0];
66fb9763
FB		 180}
181
5fafdf24 182void target_to_host_old_sigset(sigset_t *sigset,
992f48a0 183 const abi_ulong *old_sigset)
66fb9763 184{
c227f099 185 target_sigset_t d;
9e5f5284
FB		 186 int i;
187
188 d.sig[0] = *old_sigset;
189 for(i = 1;i < TARGET_NSIG_WORDS; i++)
190 d.sig[i] = 0;
191 target_to_host_sigset(sigset, &d);
66fb9763
FB		 192}
193
3d3efba0
PM		 194int block_signals(void)
195{
196 TaskState *ts = (TaskState *)thread_cpu->opaque;
197 sigset_t set;
3d3efba0
PM		 198
199 /* It's OK to block everything including SIGSEGV, because we won't
200 * run any further guest code before unblocking signals in
201 * process_pending_signals().
202 */
203 sigfillset(&set);
204 sigprocmask(SIG_SETMASK, &set, 0);
205
9be38598 206 return atomic_xchg(&ts->signal_pending, 1);
3d3efba0
PM		 207}
208
1c275925
AB		 209/* Wrapper for sigprocmask function
210 * Emulates a sigprocmask in a safe way for the guest. Note that set and oldset
3d3efba0
PM		 211 * are host signal set, not guest ones. Returns -TARGET_ERESTARTSYS if
212 * a signal was already pending and the syscall must be restarted, or
213 * 0 on success.
214 * If set is NULL, this is guaranteed not to fail.
1c275925
AB		 215 */
216int do_sigprocmask(int how, const sigset_t *set, sigset_t *oldset)
217{
3d3efba0
PM		 218 TaskState *ts = (TaskState *)thread_cpu->opaque;
219
220 if (oldset) {
221 *oldset = ts->signal_mask;
222 }
a7ec0f98
PM		 223
224 if (set) {
3d3efba0 225 int i;
a7ec0f98 226
3d3efba0
PM		 227 if (block_signals()) {
228 return -TARGET_ERESTARTSYS;
229 }
a7ec0f98
PM		 230
231 switch (how) {
232 case SIG_BLOCK:
3d3efba0 233 sigorset(&ts->signal_mask, &ts->signal_mask, set);
a7ec0f98
PM		 234 break;
235 case SIG_UNBLOCK:
3d3efba0
PM		 236 for (i = 1; i <= NSIG; ++i) {
237 if (sigismember(set, i)) {
238 sigdelset(&ts->signal_mask, i);
239 }
a7ec0f98
PM		 240 }
241 break;
242 case SIG_SETMASK:
3d3efba0 243 ts->signal_mask = *set;
a7ec0f98
PM		 244 break;
245 default:
246 g_assert_not_reached();
247 }
a7ec0f98 248
3d3efba0
PM		 249 /* Silently ignore attempts to change blocking status of KILL or STOP */
250 sigdelset(&ts->signal_mask, SIGKILL);
251 sigdelset(&ts->signal_mask, SIGSTOP);
a7ec0f98 252 }
3d3efba0 253 return 0;
1c275925
AB		 254}
255
9eede5b6
PM		 256#if !defined(TARGET_OPENRISC) && !defined(TARGET_UNICORE32) && \
257 !defined(TARGET_X86_64)
3d3efba0
PM		 258/* Just set the guest's signal mask to the specified value; the
259 * caller is assumed to have called block_signals() already.
260 */
9eede5b6
PM		 261static void set_sigmask(const sigset_t *set)
262{
3d3efba0
PM		 263 TaskState *ts = (TaskState *)thread_cpu->opaque;
264
265 ts->signal_mask = *set;
9eede5b6
PM		 266}
267#endif
268
9de5e440
FB		 269/* siginfo conversion */
270
c227f099 271static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
9de5e440 272 const siginfo_t *info)
66fb9763 273{
a05c6409 274 int sig = host_to_target_signal(info->si_signo);
a70dadc7
PM		 275 int si_code = info->si_code;
276 int si_type;
9de5e440
FB		 277 tinfo->si_signo = sig;
278 tinfo->si_errno = 0;
afd7cd92 279 tinfo->si_code = info->si_code;
a05c6409 280
55d72a7e
PM		 281 /* This memset serves two purposes:
282 * (1) ensure we don't leak random junk to the guest later
283 * (2) placate false positives from gcc about fields
284 * being used uninitialized if it chooses to inline both this
285 * function and tswap_siginfo() into host_to_target_siginfo().
286 */
287 memset(tinfo->_sifields._pad, 0, sizeof(tinfo->_sifields._pad));
288
a70dadc7
PM		 289 /* This is awkward, because we have to use a combination of
290 * the si_code and si_signo to figure out which of the union's
291 * members are valid. (Within the host kernel it is always possible
292 * to tell, but the kernel carefully avoids giving userspace the
293 * high 16 bits of si_code, so we don't have the information to
294 * do this the easy way...) We therefore make our best guess,
295 * bearing in mind that a guest can spoof most of the si_codes
296 * via rt_sigqueueinfo() if it likes.
297 *
298 * Once we have made our guess, we record it in the top 16 bits of
299 * the si_code, so that tswap_siginfo() later can use it.
300 * tswap_siginfo() will strip these top bits out before writing
301 * si_code to the guest (sign-extending the lower bits).
302 */
303
304 switch (si_code) {
305 case SI_USER:
306 case SI_TKILL:
307 case SI_KERNEL:
308 /* Sent via kill(), tkill() or tgkill(), or direct from the kernel.
309 * These are the only unspoofable si_code values.
310 */
311 tinfo->_sifields._kill._pid = info->si_pid;
312 tinfo->_sifields._kill._uid = info->si_uid;
313 si_type = QEMU_SI_KILL;
314 break;
315 default:
316 /* Everything else is spoofable. Make best guess based on signal */
317 switch (sig) {
318 case TARGET_SIGCHLD:
319 tinfo->_sifields._sigchld._pid = info->si_pid;
320 tinfo->_sifields._sigchld._uid = info->si_uid;
321 tinfo->_sifields._sigchld._status
da7c8647 322 = host_to_target_waitstatus(info->si_status);
a70dadc7
PM		 323 tinfo->_sifields._sigchld._utime = info->si_utime;
324 tinfo->_sifields._sigchld._stime = info->si_stime;
325 si_type = QEMU_SI_CHLD;
326 break;
327 case TARGET_SIGIO:
328 tinfo->_sifields._sigpoll._band = info->si_band;
329 tinfo->_sifields._sigpoll._fd = info->si_fd;
330 si_type = QEMU_SI_POLL;
331 break;
332 default:
333 /* Assume a sigqueue()/mq_notify()/rt_sigqueueinfo() source. */
334 tinfo->_sifields._rt._pid = info->si_pid;
335 tinfo->_sifields._rt._uid = info->si_uid;
336 /* XXX: potential problem if 64 bit */
337 tinfo->_sifields._rt._sigval.sival_ptr
da7c8647 338 = (abi_ulong)(unsigned long)info->si_value.sival_ptr;
a70dadc7
PM		 339 si_type = QEMU_SI_RT;
340 break;
341 }
342 break;
9de5e440 343 }
a70dadc7
PM		 344
345 tinfo->si_code = deposit32(si_code, 16, 16, si_type);
9de5e440
FB		 346}
347
c227f099
AL		 348static void tswap_siginfo(target_siginfo_t *tinfo,
349 const target_siginfo_t *info)
9de5e440 350{
a70dadc7
PM		 351 int si_type = extract32(info->si_code, 16, 16);
352 int si_code = sextract32(info->si_code, 0, 16);
353
354 __put_user(info->si_signo, &tinfo->si_signo);
355 __put_user(info->si_errno, &tinfo->si_errno);
356 __put_user(si_code, &tinfo->si_code);
357
358 /* We can use our internal marker of which fields in the structure
359 * are valid, rather than duplicating the guesswork of
360 * host_to_target_siginfo_noswap() here.
361 */
362 switch (si_type) {
363 case QEMU_SI_KILL:
364 __put_user(info->_sifields._kill._pid, &tinfo->_sifields._kill._pid);
365 __put_user(info->_sifields._kill._uid, &tinfo->_sifields._kill._uid);
366 break;
367 case QEMU_SI_TIMER:
368 __put_user(info->_sifields._timer._timer1,
369 &tinfo->_sifields._timer._timer1);
370 __put_user(info->_sifields._timer._timer2,
371 &tinfo->_sifields._timer._timer2);
372 break;
373 case QEMU_SI_POLL:
374 __put_user(info->_sifields._sigpoll._band,
375 &tinfo->_sifields._sigpoll._band);
376 __put_user(info->_sifields._sigpoll._fd,
377 &tinfo->_sifields._sigpoll._fd);
378 break;
379 case QEMU_SI_FAULT:
380 __put_user(info->_sifields._sigfault._addr,
381 &tinfo->_sifields._sigfault._addr);
382 break;
383 case QEMU_SI_CHLD:
384 __put_user(info->_sifields._sigchld._pid,
385 &tinfo->_sifields._sigchld._pid);
386 __put_user(info->_sifields._sigchld._uid,
387 &tinfo->_sifields._sigchld._uid);
388 __put_user(info->_sifields._sigchld._status,
389 &tinfo->_sifields._sigchld._status);
390 __put_user(info->_sifields._sigchld._utime,
391 &tinfo->_sifields._sigchld._utime);
392 __put_user(info->_sifields._sigchld._stime,
393 &tinfo->_sifields._sigchld._stime);
394 break;
395 case QEMU_SI_RT:
396 __put_user(info->_sifields._rt._pid, &tinfo->_sifields._rt._pid);
397 __put_user(info->_sifields._rt._uid, &tinfo->_sifields._rt._uid);
398 __put_user(info->_sifields._rt._sigval.sival_ptr,
399 &tinfo->_sifields._rt._sigval.sival_ptr);
400 break;
401 default:
402 g_assert_not_reached();
9de5e440
FB		 403 }
404}
405
c227f099 406void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info)
9de5e440 407{
55d72a7e
PM		 408 target_siginfo_t tgt_tmp;
409 host_to_target_siginfo_noswap(&tgt_tmp, info);
410 tswap_siginfo(tinfo, &tgt_tmp);
66fb9763
FB		 411}
412
9de5e440 413/* XXX: we support only POSIX RT signals are used. */
aa1f17c1 414/* XXX: find a solution for 64 bit (additional malloced data is needed) */
c227f099 415void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo)
66fb9763 416{
90c0f080
PM		 417 /* This conversion is used only for the rt_sigqueueinfo syscall,
418 * and so we know that the _rt fields are the valid ones.
419 */
420 abi_ulong sival_ptr;
421
422 __get_user(info->si_signo, &tinfo->si_signo);
423 __get_user(info->si_errno, &tinfo->si_errno);
424 __get_user(info->si_code, &tinfo->si_code);
425 __get_user(info->si_pid, &tinfo->_sifields._rt._pid);
426 __get_user(info->si_uid, &tinfo->_sifields._rt._uid);
427 __get_user(sival_ptr, &tinfo->_sifields._rt._sigval.sival_ptr);
428 info->si_value.sival_ptr = (void *)(long)sival_ptr;
66fb9763
FB		 429}
430
ca587a8e
AJ		 431static int fatal_signal (int sig)
432{
433 switch (sig) {
434 case TARGET_SIGCHLD:
435 case TARGET_SIGURG:
436 case TARGET_SIGWINCH:
437 /* Ignored by default. */
438 return 0;
439 case TARGET_SIGCONT:
440 case TARGET_SIGSTOP:
441 case TARGET_SIGTSTP:
442 case TARGET_SIGTTIN:
443 case TARGET_SIGTTOU:
444 /* Job control signals. */
445 return 0;
446 default:
447 return 1;
448 }
449}
450
edf8e2af
MW		 451/* returns 1 if given signal should dump core if not handled */
452static int core_dump_signal(int sig)
453{
454 switch (sig) {
455 case TARGET_SIGABRT:
456 case TARGET_SIGFPE:
457 case TARGET_SIGILL:
458 case TARGET_SIGQUIT:
459 case TARGET_SIGSEGV:
460 case TARGET_SIGTRAP:
461 case TARGET_SIGBUS:
462 return (1);
463 default:
464 return (0);
465 }
466}
467
31e31b8a
FB		 468void signal_init(void)
469{
3d3efba0 470 TaskState *ts = (TaskState *)thread_cpu->opaque;
31e31b8a 471 struct sigaction act;
624f7979 472 struct sigaction oact;
9e5f5284 473 int i, j;
624f7979 474 int host_sig;
31e31b8a 475
9e5f5284 476 /* generate signal conversion tables */
3ca05588 477 for(i = 1; i < _NSIG; i++) {
9e5f5284
FB		 478 if (host_to_target_signal_table[i] == 0)
479 host_to_target_signal_table[i] = i;
480 }
3ca05588 481 for(i = 1; i < _NSIG; i++) {
9e5f5284
FB		 482 j = host_to_target_signal_table[i];
483 target_to_host_signal_table[j] = i;
484 }
3b46e624 485
3d3efba0
PM		 486 /* Set the signal mask from the host mask. */
487 sigprocmask(0, 0, &ts->signal_mask);
488
9de5e440
FB		 489 /* set all host signal handlers. ALL signals are blocked during
490 the handlers to serialize them. */
624f7979
PB		 491 memset(sigact_table, 0, sizeof(sigact_table));
492
9de5e440 493 sigfillset(&act.sa_mask);
31e31b8a
FB		 494 act.sa_flags = SA_SIGINFO;
495 act.sa_sigaction = host_signal_handler;
624f7979
PB		 496 for(i = 1; i <= TARGET_NSIG; i++) {
497 host_sig = target_to_host_signal(i);
498 sigaction(host_sig, NULL, &oact);
499 if (oact.sa_sigaction == (void *)SIG_IGN) {
500 sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
501 } else if (oact.sa_sigaction == (void *)SIG_DFL) {
502 sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
503 }
504 /* If there's already a handler installed then something has
505 gone horribly wrong, so don't even try to handle that case. */
ca587a8e
AJ		 506 /* Install some handlers for our own use. We need at least
507 SIGSEGV and SIGBUS, to detect exceptions. We can not just
508 trap all signals because it affects syscall interrupt
509 behavior. But do trap all default-fatal signals. */
510 if (fatal_signal (i))
624f7979 511 sigaction(host_sig, &act, NULL);
31e31b8a 512 }
66fb9763
FB		 513}
514
c4b35744 515#if !(defined(TARGET_X86_64) || defined(TARGET_UNICORE32))
c599d4d6
PM		 516/* Force a synchronously taken signal. The kernel force_sig() function
517 * also forces the signal to "not blocked, not ignored", but for QEMU
518 * that work is done in process_pending_signals().
519 */
520static void force_sig(int sig)
521{
522 CPUState *cpu = thread_cpu;
523 CPUArchState *env = cpu->env_ptr;
524 target_siginfo_t info;
525
526 info.si_signo = sig;
527 info.si_errno = 0;
528 info.si_code = TARGET_SI_KERNEL;
529 info._sifields._kill._pid = 0;
530 info._sifields._kill._uid = 0;
531 queue_signal(env, info.si_signo, QEMU_SI_KILL, &info);
532}
09391669
PM		 533
534/* Force a SIGSEGV if we couldn't write to memory trying to set
535 * up the signal frame. oldsig is the signal we were trying to handle
536 * at the point of failure.
537 */
538static void force_sigsegv(int oldsig)
539{
09391669
PM		 540 if (oldsig == SIGSEGV) {
541 /* Make sure we don't try to deliver the signal again; this will
c599d4d6 542 * end up with handle_pending_signal() calling dump_core_and_abort().
09391669
PM		 543 */
544 sigact_table[oldsig - 1]._sa_handler = TARGET_SIG_DFL;
545 }
c4b35744 546 force_sig(TARGET_SIGSEGV);
09391669
PM		 547}
548#endif
66fb9763 549
9de5e440 550/* abort execution with signal */
c599d4d6 551static void QEMU_NORETURN dump_core_and_abort(int target_sig)
66fb9763 552{
0429a971
AF		 553 CPUState *cpu = thread_cpu;
554 CPUArchState *env = cpu->env_ptr;
555 TaskState *ts = (TaskState *)cpu->opaque;
edf8e2af 556 int host_sig, core_dumped = 0;
603e4fd7 557 struct sigaction act;
c8ee0a44 558
66393fb9 559 host_sig = target_to_host_signal(target_sig);
c8ee0a44 560 trace_user_force_sig(env, target_sig, host_sig);
a2247f8e 561 gdb_signalled(env, target_sig);
603e4fd7 562
edf8e2af 563 /* dump core if supported by target binary format */
66393fb9 564 if (core_dump_signal(target_sig) && (ts->bprm->core_dump != NULL)) {
edf8e2af
MW		 565 stop_all_tasks();
566 core_dumped =
a2247f8e 567 ((*ts->bprm->core_dump)(target_sig, env) == 0);
edf8e2af
MW		 568 }
569 if (core_dumped) {
570 /* we already dumped the core of target process, we don't want
571 * a coredump of qemu itself */
572 struct rlimit nodump;
573 getrlimit(RLIMIT_CORE, &nodump);
574 nodump.rlim_cur=0;
575 setrlimit(RLIMIT_CORE, &nodump);
576 (void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n",
66393fb9 577 target_sig, strsignal(host_sig), "core dumped" );
edf8e2af
MW		 578 }
579
0c58751c 580 /* The proper exit code for dying from an uncaught signal is
603e4fd7
AJ		 581 * -<signal>. The kernel doesn't allow exit() or _exit() to pass
582 * a negative value. To get the proper exit code we need to
583 * actually die from an uncaught signal. Here the default signal
584 * handler is installed, we send ourself a signal and we wait for
585 * it to arrive. */
586 sigfillset(&act.sa_mask);
587 act.sa_handler = SIG_DFL;
3a5d30bf 588 act.sa_flags = 0;
603e4fd7
AJ		 589 sigaction(host_sig, &act, NULL);
590
591 /* For some reason raise(host_sig) doesn't send the signal when
592 * statically linked on x86-64. */
593 kill(getpid(), host_sig);
594
595 /* Make sure the signal isn't masked (just reuse the mask inside
596 of act) */
597 sigdelset(&act.sa_mask, host_sig);
598 sigsuspend(&act.sa_mask);
599
600 /* unreachable */
a6c6f76c 601 abort();
66fb9763
FB		 602}
603
9de5e440
FB		 604/* queue a signal so that it will be send to the virtual CPU as soon
605 as possible */
9d2803f7
PM		 606int queue_signal(CPUArchState *env, int sig, int si_type,
607 target_siginfo_t *info)
31e31b8a 608{
0429a971
AF		 609 CPUState *cpu = ENV_GET_CPU(env);
610 TaskState *ts = cpu->opaque;
66fb9763 611
c8ee0a44 612 trace_user_queue_signal(env, sig);
907f5fdd 613
9d2803f7 614 info->si_code = deposit32(info->si_code, 16, 16, si_type);
a70dadc7 615
655ed67c
TB		 616 ts->sync_signal.info = *info;
617 ts->sync_signal.pending = sig;
907f5fdd
TB		 618 /* signal that a new signal is pending */
619 atomic_set(&ts->signal_pending, 1);
620 return 1; /* indicates that the signal was queued */
9de5e440
FB		 621}
622
4d330cee
TB		 623#ifndef HAVE_SAFE_SYSCALL
624static inline void rewind_if_in_safe_syscall(void *puc)
625{
626 /* Default version: never rewind */
627}
628#endif
629
5fafdf24 630static void host_signal_handler(int host_signum, siginfo_t *info,
9de5e440
FB		 631 void *puc)
632{
a2247f8e 633 CPUArchState *env = thread_cpu->env_ptr;
655ed67c
TB		 634 CPUState *cpu = ENV_GET_CPU(env);
635 TaskState *ts = cpu->opaque;
636
9de5e440 637 int sig;
c227f099 638 target_siginfo_t tinfo;
3d3efba0 639 ucontext_t *uc = puc;
655ed67c 640 struct emulated_sigtable *k;
9de5e440
FB		 641
642 /* the CPU emulator uses some host signals to detect exceptions,
eaa449b9 643 we forward to it some signals */
ca587a8e 644 if ((host_signum == SIGSEGV || host_signum == SIGBUS)
eaa449b9 645 && info->si_code > 0) {
b346ff46 646 if (cpu_signal_handler(host_signum, info, puc))
9de5e440
FB		 647 return;
648 }
649
650 /* get target signal number */
651 sig = host_to_target_signal(host_signum);
652 if (sig < 1 || sig > TARGET_NSIG)
653 return;
c8ee0a44 654 trace_user_host_signal(env, host_signum, sig);
4d330cee
TB		 655
656 rewind_if_in_safe_syscall(puc);
657
9de5e440 658 host_to_target_siginfo_noswap(&tinfo, info);
655ed67c
TB		 659 k = &ts->sigtab[sig - 1];
660 k->info = tinfo;
661 k->pending = sig;
662 ts->signal_pending = 1;
663
664 /* Block host signals until target signal handler entered. We
665 * can't block SIGSEGV or SIGBUS while we're executing guest
666 * code in case the guest code provokes one in the window between
667 * now and it getting out to the main loop. Signals will be
668 * unblocked again in process_pending_signals().
1d48fdd9
PM		 669 *
670 * WARNING: we cannot use sigfillset() here because the uc_sigmask
671 * field is a kernel sigset_t, which is much smaller than the
672 * libc sigset_t which sigfillset() operates on. Using sigfillset()
673 * would write 0xff bytes off the end of the structure and trash
674 * data on the struct.
675 * We can't use sizeof(uc->uc_sigmask) either, because the libc
676 * headers define the struct field with the wrong (too large) type.
655ed67c 677 */
1d48fdd9 678 memset(&uc->uc_sigmask, 0xff, SIGSET_T_SIZE);
655ed67c
TB		 679 sigdelset(&uc->uc_sigmask, SIGSEGV);
680 sigdelset(&uc->uc_sigmask, SIGBUS);
3d3efba0 681
655ed67c
TB		 682 /* interrupt the virtual CPU as soon as possible */
683 cpu_exit(thread_cpu);
66fb9763
FB		 684}
685
0da46a6e 686/* do_sigaltstack() returns target values and errnos. */
579a97f7
FB		 687/* compare linux/kernel/signal.c:do_sigaltstack() */
688abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
a04e134a
TS		 689{
690 int ret;
691 struct target_sigaltstack oss;
692
693 /* XXX: test errors */
579a97f7 694 if(uoss_addr)
a04e134a
TS		 695 {
696 __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp);
697 __put_user(target_sigaltstack_used.ss_size, &oss.ss_size);
698 __put_user(sas_ss_flags(sp), &oss.ss_flags);
699 }
700
579a97f7 701 if(uss_addr)
a04e134a 702 {
579a97f7
FB		 703 struct target_sigaltstack *uss;
704 struct target_sigaltstack ss;
0903c8be
TM		 705 size_t minstacksize = TARGET_MINSIGSTKSZ;
706
707#if defined(TARGET_PPC64)
708 /* ELF V2 for PPC64 has a 4K minimum stack size for signal handlers */
709 struct image_info *image = ((TaskState *)thread_cpu->opaque)->info;
710 if (get_ppc64_abi(image) > 1) {
711 minstacksize = 4096;
712 }
713#endif
a04e134a 714
0da46a6e 715 ret = -TARGET_EFAULT;
9eeb8306 716 if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)) {
a04e134a 717 goto out;
9eeb8306
RV		 718 }
719 __get_user(ss.ss_sp, &uss->ss_sp);
720 __get_user(ss.ss_size, &uss->ss_size);
721 __get_user(ss.ss_flags, &uss->ss_flags);
579a97f7 722 unlock_user_struct(uss, uss_addr, 0);
a04e134a 723
0da46a6e 724 ret = -TARGET_EPERM;
a04e134a
TS		 725 if (on_sig_stack(sp))
726 goto out;
727
0da46a6e 728 ret = -TARGET_EINVAL;
a04e134a
TS		 729 if (ss.ss_flags != TARGET_SS_DISABLE
730 && ss.ss_flags != TARGET_SS_ONSTACK
731 && ss.ss_flags != 0)
732 goto out;
733
734 if (ss.ss_flags == TARGET_SS_DISABLE) {
735 ss.ss_size = 0;
736 ss.ss_sp = 0;
737 } else {
0da46a6e 738 ret = -TARGET_ENOMEM;
0903c8be 739 if (ss.ss_size < minstacksize) {
a04e134a 740 goto out;
0903c8be 741 }
a04e134a
TS		 742 }
743
744 target_sigaltstack_used.ss_sp = ss.ss_sp;
745 target_sigaltstack_used.ss_size = ss.ss_size;
746 }
747
579a97f7 748 if (uoss_addr) {
0da46a6e 749 ret = -TARGET_EFAULT;
579a97f7 750 if (copy_to_user(uoss_addr, &oss, sizeof(oss)))
a04e134a 751 goto out;
a04e134a
TS		 752 }
753
754 ret = 0;
755out:
756 return ret;
757}
758
ef6a778e 759/* do_sigaction() return target values and host errnos */
66fb9763
FB		 760int do_sigaction(int sig, const struct target_sigaction *act,
761 struct target_sigaction *oact)
762{
624f7979 763 struct target_sigaction *k;
773b93ee
FB		 764 struct sigaction act1;
765 int host_sig;
0da46a6e 766 int ret = 0;
66fb9763 767
ef6a778e
TB		 768 if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP) {
769 return -TARGET_EINVAL;
770 }
771
772 if (block_signals()) {
773 return -TARGET_ERESTARTSYS;
774 }
775
66fb9763 776 k = &sigact_table[sig - 1];
66fb9763 777 if (oact) {
d2565875
RH		 778 __put_user(k->_sa_handler, &oact->_sa_handler);
779 __put_user(k->sa_flags, &oact->sa_flags);
388bb21a 780#if !defined(TARGET_MIPS)
d2565875 781 __put_user(k->sa_restorer, &oact->sa_restorer);
388bb21a 782#endif
d2565875 783 /* Not swapped. */
624f7979 784 oact->sa_mask = k->sa_mask;
66fb9763
FB		 785 }
786 if (act) {
624f7979 787 /* FIXME: This is not threadsafe. */
d2565875
RH		 788 __get_user(k->_sa_handler, &act->_sa_handler);
789 __get_user(k->sa_flags, &act->sa_flags);
388bb21a 790#if !defined(TARGET_MIPS)
d2565875 791 __get_user(k->sa_restorer, &act->sa_restorer);
388bb21a 792#endif
d2565875 793 /* To be swapped in target_to_host_sigset. */
624f7979 794 k->sa_mask = act->sa_mask;
773b93ee
FB		 795
796 /* we update the host linux signal state */
797 host_sig = target_to_host_signal(sig);
798 if (host_sig != SIGSEGV && host_sig != SIGBUS) {
799 sigfillset(&act1.sa_mask);
800 act1.sa_flags = SA_SIGINFO;
624f7979 801 if (k->sa_flags & TARGET_SA_RESTART)
773b93ee
FB		 802 act1.sa_flags |= SA_RESTART;
803 /* NOTE: it is important to update the host kernel signal
804 ignore state to avoid getting unexpected interrupted
805 syscalls */
624f7979 806 if (k->_sa_handler == TARGET_SIG_IGN) {
773b93ee 807 act1.sa_sigaction = (void *)SIG_IGN;
624f7979 808 } else if (k->_sa_handler == TARGET_SIG_DFL) {
ca587a8e
AJ		 809 if (fatal_signal (sig))
810 act1.sa_sigaction = host_signal_handler;
811 else
812 act1.sa_sigaction = (void *)SIG_DFL;
773b93ee
FB		 813 } else {
814 act1.sa_sigaction = host_signal_handler;
815 }
0da46a6e 816 ret = sigaction(host_sig, &act1, NULL);
773b93ee 817 }
66fb9763 818 }
0da46a6e 819 return ret;
66fb9763
FB		 820}
821
459a4017 822#if defined(TARGET_I386) && TARGET_ABI_BITS == 32
66fb9763
FB		 823
824/* from the Linux kernel */
825
826struct target_fpreg {
da7c8647
TB		 827 uint16_t significand[4];
828 uint16_t exponent;
66fb9763
FB		 829};
830
831struct target_fpxreg {
da7c8647
TB		 832 uint16_t significand[4];
833 uint16_t exponent;
834 uint16_t padding[3];
66fb9763
FB		 835};
836
837struct target_xmmreg {
da7c8647 838 abi_ulong element[4];
66fb9763
FB		 839};
840
841struct target_fpstate {
da7c8647
TB		 842 /* Regular FPU environment */
843 abi_ulong cw;
844 abi_ulong sw;
845 abi_ulong tag;
846 abi_ulong ipoff;
847 abi_ulong cssel;
848 abi_ulong dataoff;
849 abi_ulong datasel;
850 struct target_fpreg _st[8];
851 uint16_t status;
852 uint16_t magic; /* 0xffff = regular FPU data only */
853
854 /* FXSR FPU environment */
855 abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */
856 abi_ulong mxcsr;
857 abi_ulong reserved;
858 struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
859 struct target_xmmreg _xmm[8];
860 abi_ulong padding[56];
66fb9763
FB		 861};
862
863#define X86_FXSR_MAGIC 0x0000
864
865struct target_sigcontext {
da7c8647
TB		 866 uint16_t gs, __gsh;
867 uint16_t fs, __fsh;
868 uint16_t es, __esh;
869 uint16_t ds, __dsh;
870 abi_ulong edi;
871 abi_ulong esi;
872 abi_ulong ebp;
873 abi_ulong esp;
874 abi_ulong ebx;
875 abi_ulong edx;
876 abi_ulong ecx;
877 abi_ulong eax;
878 abi_ulong trapno;
879 abi_ulong err;
880 abi_ulong eip;
881 uint16_t cs, __csh;
882 abi_ulong eflags;
883 abi_ulong esp_at_signal;
884 uint16_t ss, __ssh;
885 abi_ulong fpstate; /* pointer */
886 abi_ulong oldmask;
887 abi_ulong cr2;
66fb9763
FB		 888};
889
66fb9763 890struct target_ucontext {
da7c8647
TB		 891 abi_ulong tuc_flags;
892 abi_ulong tuc_link;
893 target_stack_t tuc_stack;
894 struct target_sigcontext tuc_mcontext;
895 target_sigset_t tuc_sigmask; /* mask last for extensibility */
66fb9763
FB		 896};
897
898struct sigframe
899{
992f48a0 900 abi_ulong pretcode;
66fb9763
FB		 901 int sig;
902 struct target_sigcontext sc;
903 struct target_fpstate fpstate;
992f48a0 904 abi_ulong extramask[TARGET_NSIG_WORDS-1];
66fb9763
FB		 905 char retcode[8];
906};
907
908struct rt_sigframe
909{
992f48a0 910 abi_ulong pretcode;
66fb9763 911 int sig;
992f48a0
BS		 912 abi_ulong pinfo;
913 abi_ulong puc;
66fb9763
FB		 914 struct target_siginfo info;
915 struct target_ucontext uc;
916 struct target_fpstate fpstate;
917 char retcode[8];
918};
919
920/*
921 * Set up a signal frame.
922 */
923
66fb9763 924/* XXX: save x87 state */
41ecc72b
RV		 925static void setup_sigcontext(struct target_sigcontext *sc,
926 struct target_fpstate *fpstate, CPUX86State *env, abi_ulong mask,
927 abi_ulong fpstate_addr)
66fb9763 928{
27103424 929 CPUState *cs = CPU(x86_env_get_cpu(env));
27103424 930 uint16_t magic;
66fb9763 931
da7c8647 932 /* already locked in setup_frame() */
1d8b512b
RV		 933 __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
934 __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
935 __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
936 __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
937 __put_user(env->regs[R_EDI], &sc->edi);
938 __put_user(env->regs[R_ESI], &sc->esi);
939 __put_user(env->regs[R_EBP], &sc->ebp);
940 __put_user(env->regs[R_ESP], &sc->esp);
941 __put_user(env->regs[R_EBX], &sc->ebx);
942 __put_user(env->regs[R_EDX], &sc->edx);
943 __put_user(env->regs[R_ECX], &sc->ecx);
944 __put_user(env->regs[R_EAX], &sc->eax);
945 __put_user(cs->exception_index, &sc->trapno);
946 __put_user(env->error_code, &sc->err);
947 __put_user(env->eip, &sc->eip);
948 __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
949 __put_user(env->eflags, &sc->eflags);
950 __put_user(env->regs[R_ESP], &sc->esp_at_signal);
951 __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
ed2dcdf6 952
da7c8647
TB		 953 cpu_x86_fsave(env, fpstate_addr, 1);
954 fpstate->status = fpstate->sw;
955 magic = 0xffff;
1d8b512b
RV		 956 __put_user(magic, &fpstate->magic);
957 __put_user(fpstate_addr, &sc->fpstate);
ed2dcdf6 958
da7c8647 959 /* non-iBCS2 extensions.. */
1d8b512b
RV		 960 __put_user(mask, &sc->oldmask);
961 __put_user(env->cr[2], &sc->cr2);
31e31b8a
FB		 962}
963
66fb9763
FB		 964/*
965 * Determine which stack to use..
966 */
31e31b8a 967
579a97f7 968static inline abi_ulong
624f7979 969get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
31e31b8a 970{
da7c8647 971 unsigned long esp;
66fb9763 972
da7c8647
TB		 973 /* Default to using normal stack */
974 esp = env->regs[R_ESP];
975 /* This is the X/Open sanctioned signal stack switching. */
976 if (ka->sa_flags & TARGET_SA_ONSTACK) {
977 if (sas_ss_flags(esp) == 0) {
978 esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
a04e134a 979 }
da7c8647 980 } else {
66fb9763 981
da7c8647 982 /* This is the legacy signal stack switching. */
a52c757c 983 if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
da7c8647
TB		 984 !(ka->sa_flags & TARGET_SA_RESTORER) &&
985 ka->sa_restorer) {
624f7979 986 esp = (unsigned long) ka->sa_restorer;
da7c8647
TB		 987 }
988 }
989 return (esp - frame_size) & -8ul;
66fb9763
FB		 990}
991
579a97f7 992/* compare linux/arch/i386/kernel/signal.c:setup_frame() */
624f7979 993static void setup_frame(int sig, struct target_sigaction *ka,
da7c8647 994 target_sigset_t *set, CPUX86State *env)
66fb9763 995{
da7c8647
TB		 996 abi_ulong frame_addr;
997 struct sigframe *frame;
998 int i;
66fb9763 999
da7c8647
TB		 1000 frame_addr = get_sigframe(ka, env, sizeof(*frame));
1001 trace_user_setup_frame(env, frame_addr);
66fb9763 1002
da7c8647
TB		 1003 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1004 goto give_sigsegv;
579a97f7 1005
b6e2c935 1006 __put_user(sig, &frame->sig);
66fb9763 1007
da7c8647
TB		 1008 setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
1009 frame_addr + offsetof(struct sigframe, fpstate));
66fb9763 1010
7df2fa36
RV		 1011 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1012 __put_user(set->sig[i], &frame->extramask[i - 1]);
1013 }
66fb9763 1014
da7c8647
TB		 1015 /* Set up to return from userspace. If provided, use a stub
1016 already in userspace. */
1017 if (ka->sa_flags & TARGET_SA_RESTORER) {
1d8b512b 1018 __put_user(ka->sa_restorer, &frame->pretcode);
da7c8647
TB		 1019 } else {
1020 uint16_t val16;
1021 abi_ulong retcode_addr;
1022 retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
1d8b512b 1023 __put_user(retcode_addr, &frame->pretcode);
da7c8647
TB		 1024 /* This is popl %eax ; movl $,%eax ; int $0x80 */
1025 val16 = 0xb858;
1d8b512b
RV		 1026 __put_user(val16, (uint16_t *)(frame->retcode+0));
1027 __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
da7c8647 1028 val16 = 0x80cd;
1d8b512b 1029 __put_user(val16, (uint16_t *)(frame->retcode+6));
da7c8647 1030 }
66fb9763 1031
66fb9763 1032
da7c8647
TB		 1033 /* Set up registers for signal handler */
1034 env->regs[R_ESP] = frame_addr;
1035 env->eip = ka->_sa_handler;
66fb9763 1036
da7c8647
TB		 1037 cpu_x86_load_seg(env, R_DS, __USER_DS);
1038 cpu_x86_load_seg(env, R_ES, __USER_DS);
1039 cpu_x86_load_seg(env, R_SS, __USER_DS);
1040 cpu_x86_load_seg(env, R_CS, __USER_CS);
1041 env->eflags &= ~TF_MASK;
66fb9763 1042
da7c8647 1043 unlock_user_struct(frame, frame_addr, 1);
579a97f7 1044
da7c8647 1045 return;
66fb9763
FB		 1046
1047give_sigsegv:
09391669 1048 force_sigsegv(sig);
66fb9763
FB		 1049}
1050
579a97f7 1051/* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
624f7979 1052static void setup_rt_frame(int sig, struct target_sigaction *ka,
c227f099 1053 target_siginfo_t *info,
da7c8647 1054 target_sigset_t *set, CPUX86State *env)
66fb9763 1055{
da7c8647
TB		 1056 abi_ulong frame_addr, addr;
1057 struct rt_sigframe *frame;
1058 int i;
66fb9763 1059
da7c8647
TB		 1060 frame_addr = get_sigframe(ka, env, sizeof(*frame));
1061 trace_user_setup_rt_frame(env, frame_addr);
66fb9763 1062
da7c8647
TB		 1063 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
1064 goto give_sigsegv;
66fb9763 1065
b6e2c935 1066 __put_user(sig, &frame->sig);
da7c8647 1067 addr = frame_addr + offsetof(struct rt_sigframe, info);
1d8b512b 1068 __put_user(addr, &frame->pinfo);
da7c8647 1069 addr = frame_addr + offsetof(struct rt_sigframe, uc);
1d8b512b 1070 __put_user(addr, &frame->puc);
f6c7a05b 1071 tswap_siginfo(&frame->info, info);
31e31b8a 1072
da7c8647 1073 /* Create the ucontext. */
1d8b512b
RV		 1074 __put_user(0, &frame->uc.tuc_flags);
1075 __put_user(0, &frame->uc.tuc_link);
1076 __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
1077 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
1078 &frame->uc.tuc_stack.ss_flags);
1079 __put_user(target_sigaltstack_used.ss_size,
1080 &frame->uc.tuc_stack.ss_size);
41ecc72b
RV		 1081 setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, env,
1082 set->sig[0], frame_addr + offsetof(struct rt_sigframe, fpstate));
1083
0188fadb
RV		 1084 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1085 __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
1086 }
31e31b8a 1087
da7c8647
TB		 1088 /* Set up to return from userspace. If provided, use a stub
1089 already in userspace. */
1090 if (ka->sa_flags & TARGET_SA_RESTORER) {
1d8b512b 1091 __put_user(ka->sa_restorer, &frame->pretcode);
da7c8647
TB		 1092 } else {
1093 uint16_t val16;
1094 addr = frame_addr + offsetof(struct rt_sigframe, retcode);
1d8b512b 1095 __put_user(addr, &frame->pretcode);
da7c8647 1096 /* This is movl $,%eax ; int $0x80 */
1d8b512b
RV		 1097 __put_user(0xb8, (char *)(frame->retcode+0));
1098 __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
da7c8647 1099 val16 = 0x80cd;
1d8b512b 1100 __put_user(val16, (uint16_t *)(frame->retcode+5));
da7c8647 1101 }
66fb9763 1102
da7c8647
TB		 1103 /* Set up registers for signal handler */
1104 env->regs[R_ESP] = frame_addr;
1105 env->eip = ka->_sa_handler;
66fb9763 1106
da7c8647
TB		 1107 cpu_x86_load_seg(env, R_DS, __USER_DS);
1108 cpu_x86_load_seg(env, R_ES, __USER_DS);
1109 cpu_x86_load_seg(env, R_SS, __USER_DS);
1110 cpu_x86_load_seg(env, R_CS, __USER_CS);
1111 env->eflags &= ~TF_MASK;
66fb9763 1112
da7c8647 1113 unlock_user_struct(frame, frame_addr, 1);
579a97f7 1114
da7c8647 1115 return;
66fb9763
FB		 1116
1117give_sigsegv:
09391669 1118 force_sigsegv(sig);
66fb9763
FB		 1119}
1120
1121static int
0284b03b 1122restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc)
66fb9763 1123{
da7c8647
TB		 1124 unsigned int err = 0;
1125 abi_ulong fpstate_addr;
1126 unsigned int tmpflags;
1127
1128 cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
1129 cpu_x86_load_seg(env, R_FS, tswap16(sc->fs));
1130 cpu_x86_load_seg(env, R_ES, tswap16(sc->es));
1131 cpu_x86_load_seg(env, R_DS, tswap16(sc->ds));
1132
1133 env->regs[R_EDI] = tswapl(sc->edi);
1134 env->regs[R_ESI] = tswapl(sc->esi);
1135 env->regs[R_EBP] = tswapl(sc->ebp);
1136 env->regs[R_ESP] = tswapl(sc->esp);
1137 env->regs[R_EBX] = tswapl(sc->ebx);
1138 env->regs[R_EDX] = tswapl(sc->edx);
1139 env->regs[R_ECX] = tswapl(sc->ecx);
0284b03b 1140 env->regs[R_EAX] = tswapl(sc->eax);
da7c8647
TB		 1141 env->eip = tswapl(sc->eip);
1142
1143 cpu_x86_load_seg(env, R_CS, lduw_p(&sc->cs) | 3);
1144 cpu_x86_load_seg(env, R_SS, lduw_p(&sc->ss) | 3);
1145
1146 tmpflags = tswapl(sc->eflags);
1147 env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
1148 // regs->orig_eax = -1; /* disable syscall checks */
1149
1150 fpstate_addr = tswapl(sc->fpstate);
1151 if (fpstate_addr != 0) {
1152 if (!access_ok(VERIFY_READ, fpstate_addr,
1153 sizeof(struct target_fpstate)))
1154 goto badframe;
1155 cpu_x86_frstor(env, fpstate_addr, 1);
1156 }
ed2dcdf6 1157
da7c8647 1158 return err;
66fb9763 1159badframe:
da7c8647 1160 return 1;
66fb9763
FB		 1161}
1162
1163long do_sigreturn(CPUX86State *env)
1164{
579a97f7
FB		 1165 struct sigframe *frame;
1166 abi_ulong frame_addr = env->regs[R_ESP] - 8;
c227f099 1167 target_sigset_t target_set;
66fb9763 1168 sigset_t set;
0284b03b 1169 int i;
66fb9763 1170
c8ee0a44 1171 trace_user_do_sigreturn(env, frame_addr);
579a97f7
FB		 1172 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1173 goto badframe;
66fb9763 1174 /* set blocked signals */
f5f601af 1175 __get_user(target_set.sig[0], &frame->sc.oldmask);
9231944d 1176 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
f5f601af 1177 __get_user(target_set.sig[i], &frame->extramask[i - 1]);
9231944d 1178 }
66fb9763 1179
9231944d 1180 target_to_host_sigset_internal(&set, &target_set);
9eede5b6 1181 set_sigmask(&set);
3b46e624 1182
66fb9763 1183 /* restore registers */
0284b03b 1184 if (restore_sigcontext(env, &frame->sc))
66fb9763 1185 goto badframe;
579a97f7 1186 unlock_user_struct(frame, frame_addr, 0);
0284b03b 1187 return -TARGET_QEMU_ESIGRETURN;
66fb9763
FB		 1188
1189badframe:
579a97f7 1190 unlock_user_struct(frame, frame_addr, 0);
66fb9763 1191 force_sig(TARGET_SIGSEGV);
c599d4d6 1192 return -TARGET_QEMU_ESIGRETURN;
66fb9763
FB		 1193}
1194
1195long do_rt_sigreturn(CPUX86State *env)
1196{
da7c8647
TB		 1197 abi_ulong frame_addr;
1198 struct rt_sigframe *frame;
1199 sigset_t set;
66fb9763 1200
da7c8647
TB		 1201 frame_addr = env->regs[R_ESP] - 4;
1202 trace_user_do_rt_sigreturn(env, frame_addr);
1203 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
1204 goto badframe;
1205 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
9eede5b6 1206 set_sigmask(&set);
5fafdf24 1207
0284b03b 1208 if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
da7c8647
TB		 1209 goto badframe;
1210 }
66fb9763 1211
da7c8647
TB		 1212 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0,
1213 get_sp_from_cpustate(env)) == -EFAULT) {
1214 goto badframe;
1215 }
a04e134a 1216
da7c8647 1217 unlock_user_struct(frame, frame_addr, 0);
0284b03b 1218 return -TARGET_QEMU_ESIGRETURN;
66fb9763
FB		 1219
1220badframe:
da7c8647
TB		 1221 unlock_user_struct(frame, frame_addr, 0);
1222 force_sig(TARGET_SIGSEGV);
c599d4d6 1223 return -TARGET_QEMU_ESIGRETURN;
66fb9763
FB		 1224}
1225
1744aea1
AS		 1226#elif defined(TARGET_AARCH64)
1227
1228struct target_sigcontext {
1229 uint64_t fault_address;
1230 /* AArch64 registers */
1231 uint64_t regs[31];
1232 uint64_t sp;
1233 uint64_t pc;
1234 uint64_t pstate;
1235 /* 4K reserved for FP/SIMD state and future expansion */
1236 char __reserved[4096] __attribute__((__aligned__(16)));
1237};
1238
1239struct target_ucontext {
1240 abi_ulong tuc_flags;
1241 abi_ulong tuc_link;
1242 target_stack_t tuc_stack;
1243 target_sigset_t tuc_sigmask;
1244 /* glibc uses a 1024-bit sigset_t */
1245 char __unused[1024 / 8 - sizeof(target_sigset_t)];
1246 /* last for future expansion */
1247 struct target_sigcontext tuc_mcontext;
1248};
1249
1250/*
1251 * Header to be used at the beginning of structures extending the user
1252 * context. Such structures must be placed after the rt_sigframe on the stack
1253 * and be 16-byte aligned. The last structure must be a dummy one with the
1254 * magic and size set to 0.
1255 */
1256struct target_aarch64_ctx {
1257 uint32_t magic;
1258 uint32_t size;
1259};
1260
1261#define TARGET_FPSIMD_MAGIC 0x46508001
1262
1263struct target_fpsimd_context {
1264 struct target_aarch64_ctx head;
1265 uint32_t fpsr;
1266 uint32_t fpcr;
1267 uint64_t vregs[32 * 2]; /* really uint128_t vregs[32] */
1268};
1269
1270/*
1271 * Auxiliary context saved in the sigcontext.__reserved array. Not exported to
1272 * user space as it will change with the addition of new context. User space
1273 * should check the magic/size information.
1274 */
1275struct target_aux_context {
1276 struct target_fpsimd_context fpsimd;
1277 /* additional context to be added before "end" */
1278 struct target_aarch64_ctx end;
1279};
1280
1281struct target_rt_sigframe {
1282 struct target_siginfo info;
1283 struct target_ucontext uc;
1284 uint64_t fp;
1285 uint64_t lr;
1286 uint32_t tramp[2];
1287};
1288
1289static int target_setup_sigframe(struct target_rt_sigframe *sf,
1290 CPUARMState *env, target_sigset_t *set)
1291{
1292 int i;
1293 struct target_aux_context *aux =
1294 (struct target_aux_context *)sf->uc.tuc_mcontext.__reserved;
1295
1296 /* set up the stack frame for unwinding */
1297 __put_user(env->xregs[29], &sf->fp);
1298 __put_user(env->xregs[30], &sf->lr);
1299
1300 for (i = 0; i < 31; i++) {
1301 __put_user(env->xregs[i], &sf->uc.tuc_mcontext.regs[i]);
1302 }
1303 __put_user(env->xregs[31], &sf->uc.tuc_mcontext.sp);
1304 __put_user(env->pc, &sf->uc.tuc_mcontext.pc);
d356312f 1305 __put_user(pstate_read(env), &sf->uc.tuc_mcontext.pstate);
1744aea1 1306
7af03928 1307 __put_user(env->exception.vaddress, &sf->uc.tuc_mcontext.fault_address);
1744aea1
AS		 1308
1309 for (i = 0; i < TARGET_NSIG_WORDS; i++) {
1310 __put_user(set->sig[i], &sf->uc.tuc_sigmask.sig[i]);
1311 }
1312
1313 for (i = 0; i < 32; i++) {
1314#ifdef TARGET_WORDS_BIGENDIAN
1315 __put_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2 + 1]);
1316 __put_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2]);
1317#else
1318 __put_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2]);
1319 __put_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2 + 1]);
1320#endif
1321 }
e0ee138b
WN		 1322 __put_user(vfp_get_fpsr(env), &aux->fpsimd.fpsr);
1323 __put_user(vfp_get_fpcr(env), &aux->fpsimd.fpcr);
1744aea1
AS		 1324 __put_user(TARGET_FPSIMD_MAGIC, &aux->fpsimd.head.magic);
1325 __put_user(sizeof(struct target_fpsimd_context),
1326 &aux->fpsimd.head.size);
1327
1328 /* set the "end" magic */
1329 __put_user(0, &aux->end.magic);
1330 __put_user(0, &aux->end.size);
1331
1332 return 0;
1333}
1334
1335static int target_restore_sigframe(CPUARMState *env,
1336 struct target_rt_sigframe *sf)
1337{
1338 sigset_t set;
1339 int i;
1340 struct target_aux_context *aux =
1341 (struct target_aux_context *)sf->uc.tuc_mcontext.__reserved;
e0ee138b 1342 uint32_t magic, size, fpsr, fpcr;
d356312f 1343 uint64_t pstate;
1744aea1
AS		 1344
1345 target_to_host_sigset(&set, &sf->uc.tuc_sigmask);
9eede5b6 1346 set_sigmask(&set);
1744aea1
AS		 1347
1348 for (i = 0; i < 31; i++) {
1349 __get_user(env->xregs[i], &sf->uc.tuc_mcontext.regs[i]);
1350 }
1351
1352 __get_user(env->xregs[31], &sf->uc.tuc_mcontext.sp);
1353 __get_user(env->pc, &sf->uc.tuc_mcontext.pc);
d356312f
PM		 1354 __get_user(pstate, &sf->uc.tuc_mcontext.pstate);
1355 pstate_write(env, pstate);
1744aea1
AS		 1356
1357 __get_user(magic, &aux->fpsimd.head.magic);
1358 __get_user(size, &aux->fpsimd.head.size);
1359
1360 if (magic != TARGET_FPSIMD_MAGIC
1361 || size != sizeof(struct target_fpsimd_context)) {
1362 return 1;
1363 }
1364
4cf23480
PM		 1365 for (i = 0; i < 32; i++) {
1366#ifdef TARGET_WORDS_BIGENDIAN
1367 __get_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2 + 1]);
1368 __get_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2]);
1369#else
1370 __get_user(env->vfp.regs[i * 2], &aux->fpsimd.vregs[i * 2]);
1371 __get_user(env->vfp.regs[i * 2 + 1], &aux->fpsimd.vregs[i * 2 + 1]);
1372#endif
1744aea1 1373 }
e0ee138b
WN		 1374 __get_user(fpsr, &aux->fpsimd.fpsr);
1375 vfp_set_fpsr(env, fpsr);
1376 __get_user(fpcr, &aux->fpsimd.fpcr);
1377 vfp_set_fpcr(env, fpcr);
1744aea1
AS		 1378
1379 return 0;
1380}
1381
1382static abi_ulong get_sigframe(struct target_sigaction *ka, CPUARMState *env)
1383{
1384 abi_ulong sp;
1385
1386 sp = env->xregs[31];
1387
1388 /*
1389 * This is the X/Open sanctioned signal stack switching.
1390 */
b545f63f 1391 if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) {
1744aea1
AS		 1392 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1393 }
1394
1395 sp = (sp - sizeof(struct target_rt_sigframe)) & ~15;
1396
1397 return sp;
1398}
1399
1400static void target_setup_frame(int usig, struct target_sigaction *ka,
1401 target_siginfo_t *info, target_sigset_t *set,
1402 CPUARMState *env)
1403{
1404 struct target_rt_sigframe *frame;
8a3ae910 1405 abi_ulong frame_addr, return_addr;
1744aea1
AS		 1406
1407 frame_addr = get_sigframe(ka, env);
c8ee0a44 1408 trace_user_setup_frame(env, frame_addr);
1744aea1
AS		 1409 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
1410 goto give_sigsegv;
1411 }
1412
1413 __put_user(0, &frame->uc.tuc_flags);
1414 __put_user(0, &frame->uc.tuc_link);
1415
1416 __put_user(target_sigaltstack_used.ss_sp,
1417 &frame->uc.tuc_stack.ss_sp);
1418 __put_user(sas_ss_flags(env->xregs[31]),
1419 &frame->uc.tuc_stack.ss_flags);
1420 __put_user(target_sigaltstack_used.ss_size,
1421 &frame->uc.tuc_stack.ss_size);
1422 target_setup_sigframe(frame, env, set);
8a3ae910
MM		 1423 if (ka->sa_flags & TARGET_SA_RESTORER) {
1424 return_addr = ka->sa_restorer;
1425 } else {
1426 /* mov x8,#__NR_rt_sigreturn; svc #0 */
1427 __put_user(0xd2801168, &frame->tramp[0]);
1428 __put_user(0xd4000001, &frame->tramp[1]);
1429 return_addr = frame_addr + offsetof(struct target_rt_sigframe, tramp);
1430 }
1744aea1
AS		 1431 env->xregs[0] = usig;
1432 env->xregs[31] = frame_addr;
1433 env->xregs[29] = env->xregs[31] + offsetof(struct target_rt_sigframe, fp);
1434 env->pc = ka->_sa_handler;
8a3ae910 1435 env->xregs[30] = return_addr;
1744aea1 1436 if (info) {
f6c7a05b 1437 tswap_siginfo(&frame->info, info);
1744aea1
AS		 1438 env->xregs[1] = frame_addr + offsetof(struct target_rt_sigframe, info);
1439 env->xregs[2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
1440 }
1441
1442 unlock_user_struct(frame, frame_addr, 1);
1443 return;
1444
1445 give_sigsegv:
1446 unlock_user_struct(frame, frame_addr, 1);
09391669 1447 force_sigsegv(usig);
1744aea1
AS		 1448}
1449
1450static void setup_rt_frame(int sig, struct target_sigaction *ka,
1451 target_siginfo_t *info, target_sigset_t *set,
1452 CPUARMState *env)
1453{
1454 target_setup_frame(sig, ka, info, set, env);
1455}
1456
1457static void setup_frame(int sig, struct target_sigaction *ka,
1458 target_sigset_t *set, CPUARMState *env)
1459{
1460 target_setup_frame(sig, ka, 0, set, env);
1461}
1462
1463long do_rt_sigreturn(CPUARMState *env)
1464{
7f72cd23 1465 struct target_rt_sigframe *frame = NULL;
1744aea1
AS		 1466 abi_ulong frame_addr = env->xregs[31];
1467
c8ee0a44 1468 trace_user_do_rt_sigreturn(env, frame_addr);
1744aea1
AS		 1469 if (frame_addr & 15) {
1470 goto badframe;
1471 }
1472
1473 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
1474 goto badframe;
1475 }
1476
1477 if (target_restore_sigframe(env, frame)) {
1478 goto badframe;
1479 }
1480
1481 if (do_sigaltstack(frame_addr +
1482 offsetof(struct target_rt_sigframe, uc.tuc_stack),
1483 0, get_sp_from_cpustate(env)) == -EFAULT) {
1484 goto badframe;
1485 }
1486
1487 unlock_user_struct(frame, frame_addr, 0);
f0267ef7 1488 return -TARGET_QEMU_ESIGRETURN;
1744aea1
AS		 1489
1490 badframe:
1491 unlock_user_struct(frame, frame_addr, 0);
1492 force_sig(TARGET_SIGSEGV);
c599d4d6 1493 return -TARGET_QEMU_ESIGRETURN;
1744aea1
AS		 1494}
1495
1496long do_sigreturn(CPUARMState *env)
1497{
1498 return do_rt_sigreturn(env);
1499}
1500
43fff238
FB		 1501#elif defined(TARGET_ARM)
1502
1503struct target_sigcontext {
da7c8647
TB		 1504 abi_ulong trap_no;
1505 abi_ulong error_code;
1506 abi_ulong oldmask;
1507 abi_ulong arm_r0;
1508 abi_ulong arm_r1;
1509 abi_ulong arm_r2;
1510 abi_ulong arm_r3;
1511 abi_ulong arm_r4;
1512 abi_ulong arm_r5;
1513 abi_ulong arm_r6;
1514 abi_ulong arm_r7;
1515 abi_ulong arm_r8;
1516 abi_ulong arm_r9;
1517 abi_ulong arm_r10;
1518 abi_ulong arm_fp;
1519 abi_ulong arm_ip;
1520 abi_ulong arm_sp;
1521 abi_ulong arm_lr;
1522 abi_ulong arm_pc;
1523 abi_ulong arm_cpsr;
1524 abi_ulong fault_address;
43fff238
FB		 1525};
1526
a745ec6d
PB		 1527struct target_ucontext_v1 {
1528 abi_ulong tuc_flags;
1529 abi_ulong tuc_link;
c227f099 1530 target_stack_t tuc_stack;
a745ec6d 1531 struct target_sigcontext tuc_mcontext;
c227f099 1532 target_sigset_t tuc_sigmask; /* mask last for extensibility */
a745ec6d
PB		 1533};
1534
1535struct target_ucontext_v2 {
992f48a0
BS		 1536 abi_ulong tuc_flags;
1537 abi_ulong tuc_link;
c227f099 1538 target_stack_t tuc_stack;
b8076a74 1539 struct target_sigcontext tuc_mcontext;
c227f099 1540 target_sigset_t tuc_sigmask; /* mask last for extensibility */
5f0b7c88 1541 char __unused[128 - sizeof(target_sigset_t)];
a745ec6d 1542 abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
43fff238
FB		 1543};
1544
0d871bdb
PM		 1545struct target_user_vfp {
1546 uint64_t fpregs[32];
1547 abi_ulong fpscr;
1548};
1549
1550struct target_user_vfp_exc {
1551 abi_ulong fpexc;
1552 abi_ulong fpinst;
1553 abi_ulong fpinst2;
1554};
1555
1556struct target_vfp_sigframe {
1557 abi_ulong magic;
1558 abi_ulong size;
1559 struct target_user_vfp ufp;
1560 struct target_user_vfp_exc ufp_exc;
1561} __attribute__((__aligned__(8)));
1562
08e11256
PM		 1563struct target_iwmmxt_sigframe {
1564 abi_ulong magic;
1565 abi_ulong size;
1566 uint64_t regs[16];
1567 /* Note that not all the coprocessor control registers are stored here */
1568 uint32_t wcssf;
1569 uint32_t wcasf;
1570 uint32_t wcgr0;
1571 uint32_t wcgr1;
1572 uint32_t wcgr2;
1573 uint32_t wcgr3;
1574} __attribute__((__aligned__(8)));
1575
0d871bdb 1576#define TARGET_VFP_MAGIC 0x56465001
08e11256 1577#define TARGET_IWMMXT_MAGIC 0x12ef842a
0d871bdb 1578
a8c33204 1579struct sigframe_v1
43fff238
FB		 1580{
1581 struct target_sigcontext sc;
992f48a0
BS		 1582 abi_ulong extramask[TARGET_NSIG_WORDS-1];
1583 abi_ulong retcode;
43fff238
FB		 1584};
1585
a8c33204
PB		 1586struct sigframe_v2
1587{
1588 struct target_ucontext_v2 uc;
1589 abi_ulong retcode;
1590};
1591
a745ec6d 1592struct rt_sigframe_v1
43fff238 1593{
f8b0aa25
FB		 1594 abi_ulong pinfo;
1595 abi_ulong puc;
43fff238 1596 struct target_siginfo info;
a745ec6d
PB		 1597 struct target_ucontext_v1 uc;
1598 abi_ulong retcode;
1599};
1600
1601struct rt_sigframe_v2
1602{
1603 struct target_siginfo info;
1604 struct target_ucontext_v2 uc;
992f48a0 1605 abi_ulong retcode;
43fff238
FB		 1606};
1607
1608#define TARGET_CONFIG_CPU_32 1
1609
1610/*
1611 * For ARM syscalls, we encode the syscall number into the instruction.
1612 */
1613#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
1614#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
1615
1616/*
1617 * For Thumb syscalls, we pass the syscall number via r7. We therefore
1618 * need two 16-bit instructions.
1619 */
1620#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
1621#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
1622
992f48a0 1623static const abi_ulong retcodes[4] = {
43fff238
FB		 1624 SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
1625 SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
1626};
1627
1628
05390248 1629static inline int valid_user_regs(CPUARMState *regs)
43fff238
FB		 1630{
1631 return 1;
1632}
1633
a8c33204 1634static void
43fff238 1635setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
05390248 1636 CPUARMState *env, abi_ulong mask)
43fff238 1637{
a0e1e6d7
PB		 1638 __put_user(env->regs[0], &sc->arm_r0);
1639 __put_user(env->regs[1], &sc->arm_r1);
1640 __put_user(env->regs[2], &sc->arm_r2);
1641 __put_user(env->regs[3], &sc->arm_r3);
1642 __put_user(env->regs[4], &sc->arm_r4);
1643 __put_user(env->regs[5], &sc->arm_r5);
1644 __put_user(env->regs[6], &sc->arm_r6);
1645 __put_user(env->regs[7], &sc->arm_r7);
1646 __put_user(env->regs[8], &sc->arm_r8);
1647 __put_user(env->regs[9], &sc->arm_r9);
1648 __put_user(env->regs[10], &sc->arm_r10);
1649 __put_user(env->regs[11], &sc->arm_fp);
1650 __put_user(env->regs[12], &sc->arm_ip);
1651 __put_user(env->regs[13], &sc->arm_sp);
1652 __put_user(env->regs[14], &sc->arm_lr);
1653 __put_user(env->regs[15], &sc->arm_pc);
43fff238 1654#ifdef TARGET_CONFIG_CPU_32
a0e1e6d7 1655 __put_user(cpsr_read(env), &sc->arm_cpsr);
43fff238
FB		 1656#endif
1657
a0e1e6d7
PB		 1658 __put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
1659 __put_user(/* current->thread.error_code */ 0, &sc->error_code);
1660 __put_user(/* current->thread.address */ 0, &sc->fault_address);
1661 __put_user(mask, &sc->oldmask);
43fff238
FB		 1662}
1663
579a97f7 1664static inline abi_ulong
05390248 1665get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize)
43fff238 1666{
a0e1e6d7
PB		 1667 unsigned long sp = regs->regs[13];
1668
1669 /*
1670 * This is the X/Open sanctioned signal stack switching.
1671 */
1672 if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) {
1673 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
1674 }
1675 /*
1676 * ATPCS B01 mandates 8-byte alignment
1677 */
1678 return (sp - framesize) & ~7;
43fff238
FB		 1679}
1680
0188fadb 1681static void
05390248 1682setup_return(CPUARMState *env, struct target_sigaction *ka,
da7c8647 1683 abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
43fff238 1684{
a0e1e6d7
PB		 1685 abi_ulong handler = ka->_sa_handler;
1686 abi_ulong retcode;
1687 int thumb = handler & 1;
1688 uint32_t cpsr = cpsr_read(env);
43fff238 1689
a0e1e6d7
PB		 1690 cpsr &= ~CPSR_IT;
1691 if (thumb) {
1692 cpsr |= CPSR_T;
1693 } else {
1694 cpsr &= ~CPSR_T;
1695 }
43fff238 1696
a0e1e6d7
PB		 1697 if (ka->sa_flags & TARGET_SA_RESTORER) {
1698 retcode = ka->sa_restorer;
1699 } else {
1700 unsigned int idx = thumb;
1701
1702 if (ka->sa_flags & TARGET_SA_SIGINFO) {
1703 idx += 2;
1704 }
43fff238 1705
0188fadb 1706 __put_user(retcodes[idx], rc);
ca8a277c 1707
a0e1e6d7
PB		 1708 retcode = rc_addr + thumb;
1709 }
43fff238 1710
a0e1e6d7
PB		 1711 env->regs[0] = usig;
1712 env->regs[13] = frame_addr;
1713 env->regs[14] = retcode;
1714 env->regs[15] = handler & (thumb ? ~1 : ~3);
1715 cpsr_write(env, cpsr, CPSR_IT | CPSR_T, CPSRWriteByInstr);
43fff238
FB		 1716}
1717
05390248 1718static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env)
0d871bdb
PM		 1719{
1720 int i;
1721 struct target_vfp_sigframe *vfpframe;
1722 vfpframe = (struct target_vfp_sigframe *)regspace;
1723 __put_user(TARGET_VFP_MAGIC, &vfpframe->magic);
1724 __put_user(sizeof(*vfpframe), &vfpframe->size);
1725 for (i = 0; i < 32; i++) {
005e1a0a 1726 __put_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]);
0d871bdb
PM		 1727 }
1728 __put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr);
1729 __put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc);
1730 __put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
1731 __put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
1732 return (abi_ulong*)(vfpframe+1);
1733}
1734
05390248
AF		 1735static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace,
1736 CPUARMState *env)
08e11256
PM		 1737{
1738 int i;
1739 struct target_iwmmxt_sigframe *iwmmxtframe;
1740 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
1741 __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic);
1742 __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size);
1743 for (i = 0; i < 16; i++) {
1744 __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
1745 }
1746 __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
1747 __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
1748 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
1749 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
1750 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
1751 __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
1752 return (abi_ulong*)(iwmmxtframe+1);
1753}
1754
a8c33204 1755static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
05390248 1756 target_sigset_t *set, CPUARMState *env)
a8c33204
PB		 1757{
1758 struct target_sigaltstack stack;
1759 int i;
0d871bdb 1760 abi_ulong *regspace;
a8c33204
PB		 1761
1762 /* Clear all the bits of the ucontext we don't use. */
1763 memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
1764
1765 memset(&stack, 0, sizeof(stack));
1766 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1767 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1768 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1769 memcpy(&uc->tuc_stack, &stack, sizeof(stack));
1770
1771 setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
0d871bdb
PM		 1772 /* Save coprocessor signal frame. */
1773 regspace = uc->tuc_regspace;
1774 if (arm_feature(env, ARM_FEATURE_VFP)) {
1775 regspace = setup_sigframe_v2_vfp(regspace, env);
1776 }
08e11256
PM		 1777 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
1778 regspace = setup_sigframe_v2_iwmmxt(regspace, env);
1779 }
1780
0d871bdb
PM		 1781 /* Write terminating magic word */
1782 __put_user(0, regspace);
1783
a8c33204
PB		 1784 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1785 __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
1786 }
1787}
1788
579a97f7 1789/* compare linux/arch/arm/kernel/signal.c:setup_frame() */
624f7979 1790static void setup_frame_v1(int usig, struct target_sigaction *ka,
05390248 1791 target_sigset_t *set, CPUARMState *regs)
43fff238 1792{
da7c8647
TB		 1793 struct sigframe_v1 *frame;
1794 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
1795 int i;
43fff238 1796
da7c8647
TB		 1797 trace_user_setup_frame(regs, frame_addr);
1798 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
28298c91 1799 goto sigsegv;
da7c8647 1800 }
579a97f7 1801
da7c8647 1802 setup_sigcontext(&frame->sc, regs, set->sig[0]);
43fff238 1803
0188fadb
RV		 1804 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1805 __put_user(set->sig[i], &frame->extramask[i - 1]);
1806 }
43fff238 1807
da7c8647
TB		 1808 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1809 frame_addr + offsetof(struct sigframe_v1, retcode));
579a97f7 1810
da7c8647 1811 unlock_user_struct(frame, frame_addr, 1);
28298c91
PM		 1812 return;
1813sigsegv:
1814 force_sigsegv(usig);
a8c33204
PB		 1815}
1816
624f7979 1817static void setup_frame_v2(int usig, struct target_sigaction *ka,
05390248 1818 target_sigset_t *set, CPUARMState *regs)
a8c33204 1819{
da7c8647
TB		 1820 struct sigframe_v2 *frame;
1821 abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
a8c33204 1822
da7c8647
TB		 1823 trace_user_setup_frame(regs, frame_addr);
1824 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
28298c91 1825 goto sigsegv;
da7c8647 1826 }
a8c33204 1827
da7c8647 1828 setup_sigframe_v2(&frame->uc, set, regs);
a8c33204 1829
da7c8647
TB		 1830 setup_return(regs, ka, &frame->retcode, frame_addr, usig,
1831 frame_addr + offsetof(struct sigframe_v2, retcode));
a8c33204 1832
da7c8647 1833 unlock_user_struct(frame, frame_addr, 1);
28298c91
PM		 1834 return;
1835sigsegv:
1836 force_sigsegv(usig);
a8c33204
PB		 1837}
1838
624f7979 1839static void setup_frame(int usig, struct target_sigaction *ka,
05390248 1840 target_sigset_t *set, CPUARMState *regs)
a8c33204
PB		 1841{
1842 if (get_osversion() >= 0x020612) {
1843 setup_frame_v2(usig, ka, set, regs);
1844 } else {
1845 setup_frame_v1(usig, ka, set, regs);
1846 }
43fff238
FB		 1847}
1848
579a97f7 1849/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
624f7979 1850static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
c227f099 1851 target_siginfo_t *info,
05390248 1852 target_sigset_t *set, CPUARMState *env)
43fff238 1853{
da7c8647
TB		 1854 struct rt_sigframe_v1 *frame;
1855 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1856 struct target_sigaltstack stack;
1857 int i;
1858 abi_ulong info_addr, uc_addr;
43fff238 1859
da7c8647
TB		 1860 trace_user_setup_rt_frame(env, frame_addr);
1861 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
28298c91 1862 goto sigsegv;
da7c8647 1863 }
edf779ff 1864
da7c8647
TB		 1865 info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
1866 __put_user(info_addr, &frame->pinfo);
1867 uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
1868 __put_user(uc_addr, &frame->puc);
1869 tswap_siginfo(&frame->info, info);
43fff238 1870
da7c8647
TB		 1871 /* Clear all the bits of the ucontext we don't use. */
1872 memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
43fff238 1873
da7c8647
TB		 1874 memset(&stack, 0, sizeof(stack));
1875 __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
1876 __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
1877 __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
1878 memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
a04e134a 1879
da7c8647
TB		 1880 setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
1881 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1882 __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
1883 }
43fff238 1884
da7c8647
TB		 1885 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1886 frame_addr + offsetof(struct rt_sigframe_v1, retcode));
a745ec6d 1887
da7c8647
TB		 1888 env->regs[1] = info_addr;
1889 env->regs[2] = uc_addr;
a745ec6d 1890
da7c8647 1891 unlock_user_struct(frame, frame_addr, 1);
28298c91
PM		 1892 return;
1893sigsegv:
1894 force_sigsegv(usig);
a745ec6d
PB		 1895}
1896
624f7979 1897static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
c227f099 1898 target_siginfo_t *info,
05390248 1899 target_sigset_t *set, CPUARMState *env)
a745ec6d 1900{
da7c8647
TB		 1901 struct rt_sigframe_v2 *frame;
1902 abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
1903 abi_ulong info_addr, uc_addr;
a745ec6d 1904
da7c8647
TB		 1905 trace_user_setup_rt_frame(env, frame_addr);
1906 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
28298c91 1907 goto sigsegv;
da7c8647 1908 }
a745ec6d 1909
da7c8647
TB		 1910 info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
1911 uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
1912 tswap_siginfo(&frame->info, info);
a745ec6d 1913
da7c8647 1914 setup_sigframe_v2(&frame->uc, set, env);
a745ec6d 1915
da7c8647
TB		 1916 setup_return(env, ka, &frame->retcode, frame_addr, usig,
1917 frame_addr + offsetof(struct rt_sigframe_v2, retcode));
a745ec6d 1918
da7c8647
TB		 1919 env->regs[1] = info_addr;
1920 env->regs[2] = uc_addr;
43fff238 1921
da7c8647 1922 unlock_user_struct(frame, frame_addr, 1);
28298c91
PM		 1923 return;
1924sigsegv:
1925 force_sigsegv(usig);
43fff238
FB		 1926}
1927
624f7979 1928static void setup_rt_frame(int usig, struct target_sigaction *ka,
c227f099 1929 target_siginfo_t *info,
05390248 1930 target_sigset_t *set, CPUARMState *env)
a745ec6d
PB		 1931{
1932 if (get_osversion() >= 0x020612) {
1933 setup_rt_frame_v2(usig, ka, info, set, env);
1934 } else {
1935 setup_rt_frame_v1(usig, ka, info, set, env);
1936 }
1937}
1938
43fff238 1939static int
05390248 1940restore_sigcontext(CPUARMState *env, struct target_sigcontext *sc)
43fff238 1941{
da7c8647
TB		 1942 int err = 0;
1943 uint32_t cpsr;
43fff238 1944
1d8b512b
RV		 1945 __get_user(env->regs[0], &sc->arm_r0);
1946 __get_user(env->regs[1], &sc->arm_r1);
1947 __get_user(env->regs[2], &sc->arm_r2);
1948 __get_user(env->regs[3], &sc->arm_r3);
1949 __get_user(env->regs[4], &sc->arm_r4);
1950 __get_user(env->regs[5], &sc->arm_r5);
1951 __get_user(env->regs[6], &sc->arm_r6);
1952 __get_user(env->regs[7], &sc->arm_r7);
1953 __get_user(env->regs[8], &sc->arm_r8);
1954 __get_user(env->regs[9], &sc->arm_r9);
1955 __get_user(env->regs[10], &sc->arm_r10);
1956 __get_user(env->regs[11], &sc->arm_fp);
1957 __get_user(env->regs[12], &sc->arm_ip);
1958 __get_user(env->regs[13], &sc->arm_sp);
1959 __get_user(env->regs[14], &sc->arm_lr);
1960 __get_user(env->regs[15], &sc->arm_pc);
43fff238 1961#ifdef TARGET_CONFIG_CPU_32
1d8b512b 1962 __get_user(cpsr, &sc->arm_cpsr);
50866ba5 1963 cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC, CPSRWriteByInstr);
43fff238
FB		 1964#endif
1965
da7c8647 1966 err |= !valid_user_regs(env);
43fff238 1967
da7c8647 1968 return err;
43fff238
FB		 1969}
1970
05390248 1971static long do_sigreturn_v1(CPUARMState *env)
43fff238 1972{
da7c8647
TB		 1973 abi_ulong frame_addr;
1974 struct sigframe_v1 *frame = NULL;
1975 target_sigset_t set;
1976 sigset_t host_set;
1977 int i;
978fae9f 1978
da7c8647
TB		 1979 /*
1980 * Since we stacked the signal on a 64-bit boundary,
1981 * then 'sp' should be word aligned here. If it's
1982 * not, then the user is trying to mess with us.
1983 */
1984 frame_addr = env->regs[13];
1985 trace_user_do_sigreturn(env, frame_addr);
1986 if (frame_addr & 7) {
1987 goto badframe;
1988 }
1989
1990 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
1991 goto badframe;
1992 }
43fff238 1993
f5f601af
RV		 1994 __get_user(set.sig[0], &frame->sc.oldmask);
1995 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1996 __get_user(set.sig[i], &frame->extramask[i - 1]);
1997 }
43fff238 1998
da7c8647 1999 target_to_host_sigset_internal(&host_set, &set);
9eede5b6 2000 set_sigmask(&host_set);
43fff238 2001
da7c8647
TB		 2002 if (restore_sigcontext(env, &frame->sc)) {
2003 goto badframe;
2004 }
43fff238
FB		 2005
2006#if 0
da7c8647
TB		 2007 /* Send SIGTRAP if we're single-stepping */
2008 if (ptrace_cancel_bpt(current))
2009 send_sig(SIGTRAP, current, 1);
43fff238 2010#endif
da7c8647 2011 unlock_user_struct(frame, frame_addr, 0);
f0267ef7 2012 return -TARGET_QEMU_ESIGRETURN;
43fff238
FB		 2013
2014badframe:
c599d4d6
PM		 2015 force_sig(TARGET_SIGSEGV);
2016 return -TARGET_QEMU_ESIGRETURN;
43fff238
FB		 2017}
2018
05390248 2019static abi_ulong *restore_sigframe_v2_vfp(CPUARMState *env, abi_ulong *regspace)
5f9099d9
PM		 2020{
2021 int i;
2022 abi_ulong magic, sz;
2023 uint32_t fpscr, fpexc;
2024 struct target_vfp_sigframe *vfpframe;
2025 vfpframe = (struct target_vfp_sigframe *)regspace;
2026
2027 __get_user(magic, &vfpframe->magic);
2028 __get_user(sz, &vfpframe->size);
2029 if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) {
2030 return 0;
2031 }
2032 for (i = 0; i < 32; i++) {
005e1a0a 2033 __get_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]);
5f9099d9
PM		 2034 }
2035 __get_user(fpscr, &vfpframe->ufp.fpscr);
2036 vfp_set_fpscr(env, fpscr);
2037 __get_user(fpexc, &vfpframe->ufp_exc.fpexc);
2038 /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid
2039 * and the exception flag is cleared
2040 */
2041 fpexc |= (1 << 30);
2042 fpexc &= ~((1 << 31) | (1 << 28));
2043 env->vfp.xregs[ARM_VFP_FPEXC] = fpexc;
2044 __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
2045 __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
2046 return (abi_ulong*)(vfpframe + 1);
2047}
2048
05390248
AF		 2049static abi_ulong *restore_sigframe_v2_iwmmxt(CPUARMState *env,
2050 abi_ulong *regspace)
a59d69da
PM		 2051{
2052 int i;
2053 abi_ulong magic, sz;
2054 struct target_iwmmxt_sigframe *iwmmxtframe;
2055 iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
2056
2057 __get_user(magic, &iwmmxtframe->magic);
2058 __get_user(sz, &iwmmxtframe->size);
2059 if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) {
2060 return 0;
2061 }
2062 for (i = 0; i < 16; i++) {
2063 __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
2064 }
2065 __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
2066 __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
2067 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
2068 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
2069 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
2070 __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
2071 return (abi_ulong*)(iwmmxtframe + 1);
2072}
2073
45eafb4d
TB		 2074static int do_sigframe_return_v2(CPUARMState *env,
2075 target_ulong context_addr,
a8c33204
PB		 2076 struct target_ucontext_v2 *uc)
2077{
2078 sigset_t host_set;
5f9099d9 2079 abi_ulong *regspace;
a8c33204
PB		 2080
2081 target_to_host_sigset(&host_set, &uc->tuc_sigmask);
9eede5b6 2082 set_sigmask(&host_set);
a8c33204
PB		 2083
2084 if (restore_sigcontext(env, &uc->tuc_mcontext))
2085 return 1;
2086
5f9099d9
PM		 2087 /* Restore coprocessor signal frame */
2088 regspace = uc->tuc_regspace;
2089 if (arm_feature(env, ARM_FEATURE_VFP)) {
2090 regspace = restore_sigframe_v2_vfp(env, regspace);
2091 if (!regspace) {
2092 return 1;
2093 }
2094 }
a59d69da
PM		 2095 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
2096 regspace = restore_sigframe_v2_iwmmxt(env, regspace);
2097 if (!regspace) {
2098 return 1;
2099 }
2100 }
5f9099d9 2101
45eafb4d
TB		 2102 if (do_sigaltstack(context_addr
2103 + offsetof(struct target_ucontext_v2, tuc_stack),
2104 0, get_sp_from_cpustate(env)) == -EFAULT) {
a8c33204 2105 return 1;
45eafb4d 2106 }
a8c33204
PB		 2107
2108#if 0
2109 /* Send SIGTRAP if we're single-stepping */
2110 if (ptrace_cancel_bpt(current))
da7c8647 2111 send_sig(SIGTRAP, current, 1);
a8c33204
PB		 2112#endif
2113
2114 return 0;
2115}
2116
05390248 2117static long do_sigreturn_v2(CPUARMState *env)
a8c33204 2118{
da7c8647
TB		 2119 abi_ulong frame_addr;
2120 struct sigframe_v2 *frame = NULL;
2121
2122 /*
2123 * Since we stacked the signal on a 64-bit boundary,
2124 * then 'sp' should be word aligned here. If it's
2125 * not, then the user is trying to mess with us.
2126 */
2127 frame_addr = env->regs[13];
2128 trace_user_do_sigreturn(env, frame_addr);
2129 if (frame_addr & 7) {
2130 goto badframe;
2131 }
978fae9f 2132
da7c8647
TB		 2133 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
2134 goto badframe;
2135 }
a8c33204 2136
45eafb4d
TB		 2137 if (do_sigframe_return_v2(env,
2138 frame_addr
2139 + offsetof(struct sigframe_v2, uc),
2140 &frame->uc)) {
da7c8647
TB		 2141 goto badframe;
2142 }
a8c33204 2143
da7c8647 2144 unlock_user_struct(frame, frame_addr, 0);
f0267ef7 2145 return -TARGET_QEMU_ESIGRETURN;
a8c33204
PB		 2146
2147badframe:
da7c8647 2148 unlock_user_struct(frame, frame_addr, 0);
c599d4d6
PM		 2149 force_sig(TARGET_SIGSEGV);
2150 return -TARGET_QEMU_ESIGRETURN;
a8c33204
PB		 2151}
2152
05390248 2153long do_sigreturn(CPUARMState *env)
a8c33204
PB		 2154{
2155 if (get_osversion() >= 0x020612) {
2156 return do_sigreturn_v2(env);
2157 } else {
2158 return do_sigreturn_v1(env);
2159 }
2160}
2161
05390248 2162static long do_rt_sigreturn_v1(CPUARMState *env)
43fff238 2163{
da7c8647
TB		 2164 abi_ulong frame_addr;
2165 struct rt_sigframe_v1 *frame = NULL;
2166 sigset_t host_set;
978fae9f 2167
da7c8647
TB		 2168 /*
2169 * Since we stacked the signal on a 64-bit boundary,
2170 * then 'sp' should be word aligned here. If it's
2171 * not, then the user is trying to mess with us.
2172 */
2173 frame_addr = env->regs[13];
2174 trace_user_do_rt_sigreturn(env, frame_addr);
2175 if (frame_addr & 7) {
2176 goto badframe;
2177 }
a745ec6d 2178
da7c8647
TB		 2179 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
2180 goto badframe;
2181 }
2182
2183 target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
9eede5b6 2184 set_sigmask(&host_set);
a745ec6d 2185
da7c8647
TB		 2186 if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
2187 goto badframe;
2188 }
a745ec6d 2189
da7c8647
TB		 2190 if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
2191 goto badframe;
a745ec6d
PB		 2192
2193#if 0
da7c8647
TB		 2194 /* Send SIGTRAP if we're single-stepping */
2195 if (ptrace_cancel_bpt(current))
2196 send_sig(SIGTRAP, current, 1);
a745ec6d 2197#endif
da7c8647 2198 unlock_user_struct(frame, frame_addr, 0);
f0267ef7 2199 return -TARGET_QEMU_ESIGRETURN;
a745ec6d
PB		 2200
2201badframe:
da7c8647 2202 unlock_user_struct(frame, frame_addr, 0);
c599d4d6
PM		 2203 force_sig(TARGET_SIGSEGV);
2204 return -TARGET_QEMU_ESIGRETURN;
a745ec6d
PB		 2205}
2206
05390248 2207static long do_rt_sigreturn_v2(CPUARMState *env)
a745ec6d 2208{
da7c8647
TB		 2209 abi_ulong frame_addr;
2210 struct rt_sigframe_v2 *frame = NULL;
978fae9f 2211
da7c8647
TB		 2212 /*
2213 * Since we stacked the signal on a 64-bit boundary,
2214 * then 'sp' should be word aligned here. If it's
2215 * not, then the user is trying to mess with us.
2216 */
2217 frame_addr = env->regs[13];
2218 trace_user_do_rt_sigreturn(env, frame_addr);
2219 if (frame_addr & 7) {
2220 goto badframe;
2221 }
2222
2223 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
2224 goto badframe;
2225 }
43fff238 2226
45eafb4d
TB		 2227 if (do_sigframe_return_v2(env,
2228 frame_addr
2229 + offsetof(struct rt_sigframe_v2, uc),
2230 &frame->uc)) {
da7c8647
TB		 2231 goto badframe;
2232 }
a04e134a 2233
da7c8647 2234 unlock_user_struct(frame, frame_addr, 0);
f0267ef7 2235 return -TARGET_QEMU_ESIGRETURN;
43fff238
FB		 2236
2237badframe:
da7c8647 2238 unlock_user_struct(frame, frame_addr, 0);
c599d4d6
PM		 2239 force_sig(TARGET_SIGSEGV);
2240 return -TARGET_QEMU_ESIGRETURN;
43fff238
FB		 2241}
2242
05390248 2243long do_rt_sigreturn(CPUARMState *env)
a745ec6d
PB		 2244{
2245 if (get_osversion() >= 0x020612) {
2246 return do_rt_sigreturn_v2(env);
2247 } else {
2248 return do_rt_sigreturn_v1(env);
2249 }
2250}
2251
6d5e216d 2252#elif defined(TARGET_SPARC)
80a9d035 2253
6d5e216d
FB		 2254#define __SUNOS_MAXWIN 31
2255
2256/* This is what SunOS does, so shall I. */
2257struct target_sigcontext {
da7c8647 2258 abi_ulong sigc_onstack; /* state to restore */
6d5e216d 2259
da7c8647
TB		 2260 abi_ulong sigc_mask; /* sigmask to restore */
2261 abi_ulong sigc_sp; /* stack pointer */
2262 abi_ulong sigc_pc; /* program counter */
2263 abi_ulong sigc_npc; /* next program counter */
2264 abi_ulong sigc_psr; /* for condition codes etc */
2265 abi_ulong sigc_g1; /* User uses these two registers */
2266 abi_ulong sigc_o0; /* within the trampoline code. */
6d5e216d 2267
da7c8647 2268 /* Now comes information regarding the users window set
6d5e216d
FB		 2269 * at the time of the signal.
2270 */
da7c8647 2271 abi_ulong sigc_oswins; /* outstanding windows */
6d5e216d 2272
da7c8647
TB		 2273 /* stack ptrs for each regwin buf */
2274 char *sigc_spbuf[__SUNOS_MAXWIN];
6d5e216d 2275
da7c8647
TB		 2276 /* Windows to restore after signal */
2277 struct {
2278 abi_ulong locals[8];
2279 abi_ulong ins[8];
2280 } sigc_wbuf[__SUNOS_MAXWIN];
6d5e216d
FB		 2281};
2282/* A Sparc stack frame */
2283struct sparc_stackf {
da7c8647
TB		 2284 abi_ulong locals[8];
2285 abi_ulong ins[8];
2286 /* It's simpler to treat fp and callers_pc as elements of ins[]
e321c34a
PM		 2287 * since we never need to access them ourselves.
2288 */
da7c8647
TB		 2289 char *structptr;
2290 abi_ulong xargs[6];
2291 abi_ulong xxargs[1];
6d5e216d
FB		 2292};
2293
2294typedef struct {
da7c8647
TB		 2295 struct {
2296 abi_ulong psr;
2297 abi_ulong pc;
2298 abi_ulong npc;
2299 abi_ulong y;
2300 abi_ulong u_regs[16]; /* globals and ins */
2301 } si_regs;
2302 int si_mask;
6d5e216d
FB		 2303} __siginfo_t;
2304
2305typedef struct {
da7c8647
TB		 2306 abi_ulong si_float_regs[32];
2307 unsigned long si_fsr;
2308 unsigned long si_fpqdepth;
2309 struct {
2310 unsigned long *insn_addr;
2311 unsigned long insn;
2312 } si_fpqueue [16];
c227f099 2313} qemu_siginfo_fpu_t;
6d5e216d
FB		 2314
2315
2316struct target_signal_frame {
da7c8647
TB		 2317 struct sparc_stackf ss;
2318 __siginfo_t info;
2319 abi_ulong fpu_save;
2320 abi_ulong insns[2] __attribute__ ((aligned (8)));
2321 abi_ulong extramask[TARGET_NSIG_WORDS - 1];
2322 abi_ulong extra_size; /* Should be 0 */
2323 qemu_siginfo_fpu_t fpu_state;
6d5e216d
FB		 2324};
2325struct target_rt_signal_frame {
da7c8647
TB		 2326 struct sparc_stackf ss;
2327 siginfo_t info;
2328 abi_ulong regs[20];
2329 sigset_t mask;
2330 abi_ulong fpu_save;
2331 unsigned int insns[2];
2332 stack_t stack;
2333 unsigned int extra_size; /* Should be 0 */
2334 qemu_siginfo_fpu_t fpu_state;
6d5e216d
FB		 2335};
2336
e80cfcfc
FB		 2337#define UREG_O0 16
2338#define UREG_O6 22
2339#define UREG_I0 0
2340#define UREG_I1 1
2341#define UREG_I2 2
5bfb56b2
BS		 2342#define UREG_I3 3
2343#define UREG_I4 4
2344#define UREG_I5 5
e80cfcfc
FB		 2345#define UREG_I6 6
2346#define UREG_I7 7
2347#define UREG_L0 8
6d5e216d
FB		 2348#define UREG_FP UREG_I6
2349#define UREG_SP UREG_O6
2350
624f7979 2351static inline abi_ulong get_sigframe(struct target_sigaction *sa,
05390248
AF		 2352 CPUSPARCState *env,
2353 unsigned long framesize)
6d5e216d 2354{
da7c8647 2355 abi_ulong sp;
6d5e216d 2356
da7c8647 2357 sp = env->regwptr[UREG_FP];
6d5e216d 2358
da7c8647
TB		 2359 /* This is the X/Open sanctioned signal stack switching. */
2360 if (sa->sa_flags & TARGET_SA_ONSTACK) {
2361 if (!on_sig_stack(sp)
2362 && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7)) {
2363 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
2364 }
2365 }
2366 return sp - framesize;
6d5e216d
FB		 2367}
2368
2369static int
05390248 2370setup___siginfo(__siginfo_t *si, CPUSPARCState *env, abi_ulong mask)
6d5e216d 2371{
da7c8647 2372 int err = 0, i;
6d5e216d 2373
1d8b512b
RV		 2374 __put_user(env->psr, &si->si_regs.psr);
2375 __put_user(env->pc, &si->si_regs.pc);
2376 __put_user(env->npc, &si->si_regs.npc);
2377 __put_user(env->y, &si->si_regs.y);
da7c8647 2378 for (i=0; i < 8; i++) {
1d8b512b 2379 __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
da7c8647
TB		 2380 }
2381 for (i=0; i < 8; i++) {
1d8b512b 2382 __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
da7c8647 2383 }
1d8b512b 2384 __put_user(mask, &si->si_mask);
da7c8647 2385 return err;
6d5e216d 2386}
e80cfcfc 2387
80a9d035 2388#if 0
6d5e216d
FB		 2389static int
2390setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
05390248 2391 CPUSPARCState *env, unsigned long mask)
6d5e216d 2392{
da7c8647 2393 int err = 0;
6d5e216d 2394
1d8b512b
RV		 2395 __put_user(mask, &sc->sigc_mask);
2396 __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
2397 __put_user(env->pc, &sc->sigc_pc);
2398 __put_user(env->npc, &sc->sigc_npc);
2399 __put_user(env->psr, &sc->sigc_psr);
2400 __put_user(env->gregs[1], &sc->sigc_g1);
2401 __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
6d5e216d 2402
da7c8647 2403 return err;
6d5e216d 2404}
80a9d035 2405#endif
6d5e216d
FB		 2406#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
2407
624f7979 2408static void setup_frame(int sig, struct target_sigaction *ka,
05390248 2409 target_sigset_t *set, CPUSPARCState *env)
6d5e216d 2410{
da7c8647
TB		 2411 abi_ulong sf_addr;
2412 struct target_signal_frame *sf;
2413 int sigframe_size, err, i;
6d5e216d 2414
da7c8647
TB		 2415 /* 1. Make sure everything is clean */
2416 //synchronize_user_stack();
6d5e216d 2417
da7c8647
TB		 2418 sigframe_size = NF_ALIGNEDSZ;
2419 sf_addr = get_sigframe(ka, env, sigframe_size);
2420 trace_user_setup_frame(env, sf_addr);
6d5e216d 2421
da7c8647
TB		 2422 sf = lock_user(VERIFY_WRITE, sf_addr,
2423 sizeof(struct target_signal_frame), 0);
2424 if (!sf) {
2425 goto sigsegv;
2426 }
6d5e216d 2427#if 0
da7c8647
TB		 2428 if (invalid_frame_pointer(sf, sigframe_size))
2429 goto sigill_and_return;
6d5e216d 2430#endif
da7c8647
TB		 2431 /* 2. Save the current process state */
2432 err = setup___siginfo(&sf->info, env, set->sig[0]);
1d8b512b 2433 __put_user(0, &sf->extra_size);
6d5e216d 2434
da7c8647
TB		 2435 //save_fpu_state(regs, &sf->fpu_state);
2436 //__put_user(&sf->fpu_state, &sf->fpu_save);
6d5e216d 2437
1d8b512b 2438 __put_user(set->sig[0], &sf->info.si_mask);
da7c8647 2439 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
1d8b512b 2440 __put_user(set->sig[i + 1], &sf->extramask[i]);
da7c8647 2441 }
6d5e216d 2442
da7c8647 2443 for (i = 0; i < 8; i++) {
1d8b512b 2444 __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
da7c8647
TB		 2445 }
2446 for (i = 0; i < 8; i++) {
1d8b512b 2447 __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
da7c8647
TB		 2448 }
2449 if (err)
2450 goto sigsegv;
2451
2452 /* 3. signal handler back-trampoline and parameters */
2453 env->regwptr[UREG_FP] = sf_addr;
2454 env->regwptr[UREG_I0] = sig;
2455 env->regwptr[UREG_I1] = sf_addr +
2456 offsetof(struct target_signal_frame, info);
2457 env->regwptr[UREG_I2] = sf_addr +
2458 offsetof(struct target_signal_frame, info);
2459
2460 /* 4. signal handler */
2461 env->pc = ka->_sa_handler;
2462 env->npc = (env->pc + 4);
2463 /* 5. return to kernel instructions */
2464 if (ka->sa_restorer) {
2465 env->regwptr[UREG_I7] = ka->sa_restorer;
2466 } else {
2467 uint32_t val32;
2468
2469 env->regwptr[UREG_I7] = sf_addr +
2470 offsetof(struct target_signal_frame, insns) - 2 * 4;
2471
2472 /* mov __NR_sigreturn, %g1 */
2473 val32 = 0x821020d8;
1d8b512b 2474 __put_user(val32, &sf->insns[0]);
6d5e216d 2475
da7c8647
TB		 2476 /* t 0x10 */
2477 val32 = 0x91d02010;
1d8b512b 2478 __put_user(val32, &sf->insns[1]);
da7c8647
TB		 2479 if (err)
2480 goto sigsegv;
6d5e216d 2481
da7c8647
TB		 2482 /* Flush instruction space. */
2483 // flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
2484 // tb_flush(env);
2485 }
2486 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
2487 return;
459a4017
FB		 2488#if 0
2489sigill_and_return:
da7c8647 2490 force_sig(TARGET_SIGILL);
459a4017 2491#endif
6d5e216d 2492sigsegv:
da7c8647 2493 unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
09391669 2494 force_sigsegv(sig);
6d5e216d 2495}
6d5e216d 2496
624f7979 2497static void setup_rt_frame(int sig, struct target_sigaction *ka,
c227f099 2498 target_siginfo_t *info,
05390248 2499 target_sigset_t *set, CPUSPARCState *env)
6d5e216d
FB		 2500{
2501 fprintf(stderr, "setup_rt_frame: not implemented\n");
2502}
2503
05390248 2504long do_sigreturn(CPUSPARCState *env)
6d5e216d 2505{
da7c8647
TB		 2506 abi_ulong sf_addr;
2507 struct target_signal_frame *sf;
2508 uint32_t up_psr, pc, npc;
2509 target_sigset_t set;
2510 sigset_t host_set;
2511 int err=0, i;
6d5e216d 2512
da7c8647
TB		 2513 sf_addr = env->regwptr[UREG_FP];
2514 trace_user_do_sigreturn(env, sf_addr);
2515 if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) {
2516 goto segv_and_exit;
2517 }
6d5e216d 2518
da7c8647 2519 /* 1. Make sure we are not getting garbage from the user */
6d5e216d 2520
da7c8647
TB		 2521 if (sf_addr & 3)
2522 goto segv_and_exit;
6d5e216d 2523
da7c8647
TB		 2524 __get_user(pc, &sf->info.si_regs.pc);
2525 __get_user(npc, &sf->info.si_regs.npc);
6d5e216d 2526
da7c8647
TB		 2527 if ((pc | npc) & 3) {
2528 goto segv_and_exit;
2529 }
6d5e216d 2530
da7c8647
TB		 2531 /* 2. Restore the state */
2532 __get_user(up_psr, &sf->info.si_regs.psr);
e80cfcfc 2533
da7c8647
TB		 2534 /* User can only change condition codes and FPU enabling in %psr. */
2535 env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
2536 | (env->psr & ~(PSR_ICC /* | PSR_EF */));
a315a145 2537
da7c8647
TB		 2538 env->pc = pc;
2539 env->npc = npc;
2540 __get_user(env->y, &sf->info.si_regs.y);
2541 for (i=0; i < 8; i++) {
2542 __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
2543 }
2544 for (i=0; i < 8; i++) {
2545 __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
2546 }
6d5e216d 2547
da7c8647 2548 /* FIXME: implement FPU save/restore:
2aec3a27
PM		 2549 * __get_user(fpu_save, &sf->fpu_save);
2550 * if (fpu_save)
2551 * err |= restore_fpu_state(env, fpu_save);
2552 */
6d5e216d 2553
da7c8647 2554 /* This is pretty much atomic, no amount locking would prevent
6d5e216d
FB		 2555 * the races which exist anyways.
2556 */
da7c8647
TB		 2557 __get_user(set.sig[0], &sf->info.si_mask);
2558 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
2559 __get_user(set.sig[i], &sf->extramask[i - 1]);
2560 }
e80cfcfc 2561
da7c8647 2562 target_to_host_sigset_internal(&host_set, &set);
9eede5b6 2563 set_sigmask(&host_set);
6d5e216d 2564
da7c8647
TB		 2565 if (err) {
2566 goto segv_and_exit;
2567 }
2568 unlock_user_struct(sf, sf_addr, 0);
c0bea68f 2569 return -TARGET_QEMU_ESIGRETURN;
6d5e216d
FB		 2570
2571segv_and_exit:
da7c8647
TB		 2572 unlock_user_struct(sf, sf_addr, 0);
2573 force_sig(TARGET_SIGSEGV);
c599d4d6 2574 return -TARGET_QEMU_ESIGRETURN;
6d5e216d
FB		 2575}
2576
05390248 2577long do_rt_sigreturn(CPUSPARCState *env)
6d5e216d 2578{
c8ee0a44 2579 trace_user_do_rt_sigreturn(env, 0);
6d5e216d 2580 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
f8b0aa25 2581 return -TARGET_ENOSYS;
6d5e216d
FB		 2582}
2583
459a4017 2584#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
5bfb56b2
BS		 2585#define MC_TSTATE 0
2586#define MC_PC 1
2587#define MC_NPC 2
2588#define MC_Y 3
2589#define MC_G1 4
2590#define MC_G2 5
2591#define MC_G3 6
2592#define MC_G4 7
2593#define MC_G5 8
2594#define MC_G6 9
2595#define MC_G7 10
2596#define MC_O0 11
2597#define MC_O1 12
2598#define MC_O2 13
2599#define MC_O3 14
2600#define MC_O4 15
2601#define MC_O5 16
2602#define MC_O6 17
2603#define MC_O7 18
2604#define MC_NGREG 19
2605
c227f099
AL		 2606typedef abi_ulong target_mc_greg_t;
2607typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
5bfb56b2
BS		 2608
2609struct target_mc_fq {
992f48a0 2610 abi_ulong *mcfq_addr;
5bfb56b2
BS		 2611 uint32_t mcfq_insn;
2612};
2613
2614struct target_mc_fpu {
2615 union {
2616 uint32_t sregs[32];
2617 uint64_t dregs[32];
2618 //uint128_t qregs[16];
2619 } mcfpu_fregs;
992f48a0
BS		 2620 abi_ulong mcfpu_fsr;
2621 abi_ulong mcfpu_fprs;
2622 abi_ulong mcfpu_gsr;
5bfb56b2
BS		 2623 struct target_mc_fq *mcfpu_fq;
2624 unsigned char mcfpu_qcnt;
2625 unsigned char mcfpu_qentsz;
2626 unsigned char mcfpu_enab;
2627};
c227f099 2628typedef struct target_mc_fpu target_mc_fpu_t;
5bfb56b2
BS		 2629
2630typedef struct {
c227f099
AL		 2631 target_mc_gregset_t mc_gregs;
2632 target_mc_greg_t mc_fp;
2633 target_mc_greg_t mc_i7;
2634 target_mc_fpu_t mc_fpregs;
2635} target_mcontext_t;
5bfb56b2
BS		 2636
2637struct target_ucontext {
60e99246
AJ		 2638 struct target_ucontext *tuc_link;
2639 abi_ulong tuc_flags;
2640 target_sigset_t tuc_sigmask;
2641 target_mcontext_t tuc_mcontext;
5bfb56b2
BS		 2642};
2643
2644/* A V9 register window */
2645struct target_reg_window {
992f48a0
BS		 2646 abi_ulong locals[8];
2647 abi_ulong ins[8];
5bfb56b2
BS		 2648};
2649
2650#define TARGET_STACK_BIAS 2047
2651
2652/* {set, get}context() needed for 64-bit SparcLinux userland. */
2653void sparc64_set_context(CPUSPARCState *env)
2654{
459a4017
FB		 2655 abi_ulong ucp_addr;
2656 struct target_ucontext *ucp;
c227f099 2657 target_mc_gregset_t *grp;
992f48a0 2658 abi_ulong pc, npc, tstate;
459a4017 2659 abi_ulong fp, i7, w_addr;
5bfb56b2 2660 unsigned int i;
5bfb56b2 2661
459a4017 2662 ucp_addr = env->regwptr[UREG_I0];
da7c8647 2663 if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) {
459a4017 2664 goto do_sigsegv;
da7c8647 2665 }
60e99246 2666 grp = &ucp->tuc_mcontext.mc_gregs;
1d8b512b
RV		 2667 __get_user(pc, &((*grp)[MC_PC]));
2668 __get_user(npc, &((*grp)[MC_NPC]));
da7c8647 2669 if ((pc | npc) & 3) {
5bfb56b2 2670 goto do_sigsegv;
da7c8647 2671 }
5bfb56b2 2672 if (env->regwptr[UREG_I1]) {
c227f099 2673 target_sigset_t target_set;
5bfb56b2
BS		 2674 sigset_t set;
2675
2676 if (TARGET_NSIG_WORDS == 1) {
be3ef5c7 2677 __get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0]);
5bfb56b2 2678 } else {
459a4017 2679 abi_ulong *src, *dst;
60e99246 2680 src = ucp->tuc_sigmask.sig;
459a4017 2681 dst = target_set.sig;
0d9e61c2 2682 for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) {
1d8b512b 2683 __get_user(*dst, src);
0d9e61c2 2684 }
5bfb56b2
BS		 2685 }
2686 target_to_host_sigset_internal(&set, &target_set);
9eede5b6 2687 set_sigmask(&set);
5bfb56b2
BS		 2688 }
2689 env->pc = pc;
2690 env->npc = npc;
1d8b512b
RV		 2691 __get_user(env->y, &((*grp)[MC_Y]));
2692 __get_user(tstate, &((*grp)[MC_TSTATE]));
5bfb56b2 2693 env->asi = (tstate >> 24) & 0xff;
5a834bb4
BS		 2694 cpu_put_ccr(env, tstate >> 32);
2695 cpu_put_cwp64(env, tstate & 0x1f);
1d8b512b
RV		 2696 __get_user(env->gregs[1], (&(*grp)[MC_G1]));
2697 __get_user(env->gregs[2], (&(*grp)[MC_G2]));
2698 __get_user(env->gregs[3], (&(*grp)[MC_G3]));
2699 __get_user(env->gregs[4], (&(*grp)[MC_G4]));
2700 __get_user(env->gregs[5], (&(*grp)[MC_G5]));
2701 __get_user(env->gregs[6], (&(*grp)[MC_G6]));
2702 __get_user(env->gregs[7], (&(*grp)[MC_G7]));
2703 __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0]));
2704 __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1]));
2705 __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2]));
2706 __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3]));
2707 __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4]));
2708 __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5]));
2709 __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6]));
2710 __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7]));
2711
2712 __get_user(fp, &(ucp->tuc_mcontext.mc_fp));
2713 __get_user(i7, &(ucp->tuc_mcontext.mc_i7));
579a97f7 2714
459a4017 2715 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
da7c8647
TB		 2716 if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2717 abi_ulong) != 0) {
459a4017 2718 goto do_sigsegv;
da7c8647
TB		 2719 }
2720 if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2721 abi_ulong) != 0) {
459a4017 2722 goto do_sigsegv;
da7c8647 2723 }
c7b016ba
PM		 2724 /* FIXME this does not match how the kernel handles the FPU in
2725 * its sparc64_set_context implementation. In particular the FPU
2726 * is only restored if fenab is non-zero in:
2727 * __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab));
2728 */
be3ef5c7 2729 __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs));
459a4017 2730 {
30038fd8
RH		 2731 uint32_t *src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2732 for (i = 0; i < 64; i++, src++) {
2733 if (i & 1) {
1d8b512b 2734 __get_user(env->fpr[i/2].l.lower, src);
30038fd8 2735 } else {
1d8b512b 2736 __get_user(env->fpr[i/2].l.upper, src);
30038fd8
RH		 2737 }
2738 }
459a4017 2739 }
1d8b512b
RV		 2740 __get_user(env->fsr,
2741 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr));
2742 __get_user(env->gsr,
2743 &(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr));
459a4017 2744 unlock_user_struct(ucp, ucp_addr, 0);
5bfb56b2 2745 return;
da7c8647 2746do_sigsegv:
459a4017 2747 unlock_user_struct(ucp, ucp_addr, 0);
66393fb9 2748 force_sig(TARGET_SIGSEGV);
5bfb56b2
BS		 2749}
2750
2751void sparc64_get_context(CPUSPARCState *env)
2752{
459a4017
FB		 2753 abi_ulong ucp_addr;
2754 struct target_ucontext *ucp;
c227f099
AL		 2755 target_mc_gregset_t *grp;
2756 target_mcontext_t *mcp;
459a4017 2757 abi_ulong fp, i7, w_addr;
5bfb56b2
BS		 2758 int err;
2759 unsigned int i;
c227f099 2760 target_sigset_t target_set;
5bfb56b2
BS		 2761 sigset_t set;
2762
459a4017 2763 ucp_addr = env->regwptr[UREG_I0];
da7c8647 2764 if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) {
459a4017 2765 goto do_sigsegv;
da7c8647 2766 }
459a4017 2767
60e99246 2768 mcp = &ucp->tuc_mcontext;
5bfb56b2
BS		 2769 grp = &mcp->mc_gregs;
2770
2771 /* Skip over the trap instruction, first. */
2772 env->pc = env->npc;
2773 env->npc += 4;
2774
3d3efba0
PM		 2775 /* If we're only reading the signal mask then do_sigprocmask()
2776 * is guaranteed not to fail, which is important because we don't
2777 * have any way to signal a failure or restart this operation since
2778 * this is not a normal syscall.
2779 */
2780 err = do_sigprocmask(0, NULL, &set);
2781 assert(err == 0);
5bfb56b2 2782 host_to_target_sigset_internal(&target_set, &set);
459a4017 2783 if (TARGET_NSIG_WORDS == 1) {
1d8b512b
RV		 2784 __put_user(target_set.sig[0],
2785 (abi_ulong *)&ucp->tuc_sigmask);
459a4017
FB		 2786 } else {
2787 abi_ulong *src, *dst;
2788 src = target_set.sig;
60e99246 2789 dst = ucp->tuc_sigmask.sig;
0d9e61c2 2790 for (i = 0; i < TARGET_NSIG_WORDS; i++, dst++, src++) {
1d8b512b 2791 __put_user(*src, dst);
0d9e61c2 2792 }
5bfb56b2
BS		 2793 if (err)
2794 goto do_sigsegv;
2795 }
2796
459a4017 2797 /* XXX: tstate must be saved properly */
1d8b512b
RV		 2798 // __put_user(env->tstate, &((*grp)[MC_TSTATE]));
2799 __put_user(env->pc, &((*grp)[MC_PC]));
2800 __put_user(env->npc, &((*grp)[MC_NPC]));
2801 __put_user(env->y, &((*grp)[MC_Y]));
2802 __put_user(env->gregs[1], &((*grp)[MC_G1]));
2803 __put_user(env->gregs[2], &((*grp)[MC_G2]));
2804 __put_user(env->gregs[3], &((*grp)[MC_G3]));
2805 __put_user(env->gregs[4], &((*grp)[MC_G4]));
2806 __put_user(env->gregs[5], &((*grp)[MC_G5]));
2807 __put_user(env->gregs[6], &((*grp)[MC_G6]));
2808 __put_user(env->gregs[7], &((*grp)[MC_G7]));
2809 __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0]));
2810 __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1]));
2811 __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2]));
2812 __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3]));
2813 __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4]));
2814 __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5]));
2815 __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6]));
2816 __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7]));
579a97f7 2817
459a4017
FB		 2818 w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6];
2819 fp = i7 = 0;
da7c8647
TB		 2820 if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]),
2821 abi_ulong) != 0) {
459a4017 2822 goto do_sigsegv;
da7c8647
TB		 2823 }
2824 if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]),
2825 abi_ulong) != 0) {
459a4017 2826 goto do_sigsegv;
da7c8647 2827 }
1d8b512b
RV		 2828 __put_user(fp, &(mcp->mc_fp));
2829 __put_user(i7, &(mcp->mc_i7));
5bfb56b2 2830
459a4017 2831 {
30038fd8
RH		 2832 uint32_t *dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs;
2833 for (i = 0; i < 64; i++, dst++) {
2834 if (i & 1) {
1d8b512b 2835 __put_user(env->fpr[i/2].l.lower, dst);
30038fd8 2836 } else {
1d8b512b 2837 __put_user(env->fpr[i/2].l.upper, dst);
30038fd8
RH		 2838 }
2839 }
459a4017 2840 }
1d8b512b
RV		 2841 __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr));
2842 __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr));
2843 __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs));
5bfb56b2
BS		 2844
2845 if (err)
2846 goto do_sigsegv;
459a4017 2847 unlock_user_struct(ucp, ucp_addr, 1);
5bfb56b2 2848 return;
da7c8647 2849do_sigsegv:
459a4017 2850 unlock_user_struct(ucp, ucp_addr, 1);
66393fb9 2851 force_sig(TARGET_SIGSEGV);
5bfb56b2
BS		 2852}
2853#endif
ff970904 2854#elif defined(TARGET_MIPS) || defined(TARGET_MIPS64)
106ec879 2855
ff970904 2856# if defined(TARGET_ABI_MIPSO32)
106ec879
FB		 2857struct target_sigcontext {
2858 uint32_t sc_regmask; /* Unused */
2859 uint32_t sc_status;
2860 uint64_t sc_pc;
2861 uint64_t sc_regs[32];
2862 uint64_t sc_fpregs[32];
2863 uint32_t sc_ownedfp; /* Unused */
2864 uint32_t sc_fpc_csr;
2865 uint32_t sc_fpc_eir; /* Unused */
2866 uint32_t sc_used_math;
2867 uint32_t sc_dsp; /* dsp status, was sc_ssflags */
94c5495d 2868 uint32_t pad0;
106ec879
FB		 2869 uint64_t sc_mdhi;
2870 uint64_t sc_mdlo;
2871 target_ulong sc_hi1; /* Was sc_cause */
2872 target_ulong sc_lo1; /* Was sc_badvaddr */
2873 target_ulong sc_hi2; /* Was sc_sigset[4] */
2874 target_ulong sc_lo2;
2875 target_ulong sc_hi3;
2876 target_ulong sc_lo3;
2877};
ff970904
RH		 2878# else /* N32 || N64 */
2879struct target_sigcontext {
2880 uint64_t sc_regs[32];
2881 uint64_t sc_fpregs[32];
2882 uint64_t sc_mdhi;
2883 uint64_t sc_hi1;
2884 uint64_t sc_hi2;
2885 uint64_t sc_hi3;
2886 uint64_t sc_mdlo;
2887 uint64_t sc_lo1;
2888 uint64_t sc_lo2;
2889 uint64_t sc_lo3;
2890 uint64_t sc_pc;
2891 uint32_t sc_fpc_csr;
2892 uint32_t sc_used_math;
2893 uint32_t sc_dsp;
2894 uint32_t sc_reserved;
2895};
2896# endif /* O32 */
106ec879
FB		 2897
2898struct sigframe {
2899 uint32_t sf_ass[4]; /* argument save space for o32 */
2900 uint32_t sf_code[2]; /* signal trampoline */
2901 struct target_sigcontext sf_sc;
c227f099 2902 target_sigset_t sf_mask;
106ec879
FB		 2903};
2904
0b1bcb00 2905struct target_ucontext {
60e99246
AJ		 2906 target_ulong tuc_flags;
2907 target_ulong tuc_link;
2908 target_stack_t tuc_stack;
94c5495d 2909 target_ulong pad0;
60e99246
AJ		 2910 struct target_sigcontext tuc_mcontext;
2911 target_sigset_t tuc_sigmask;
0b1bcb00
PB		 2912};
2913
2914struct target_rt_sigframe {
2915 uint32_t rs_ass[4]; /* argument save space for o32 */
2916 uint32_t rs_code[2]; /* signal trampoline */
2917 struct target_siginfo rs_info;
2918 struct target_ucontext rs_uc;
2919};
2920
106ec879
FB		 2921/* Install trampoline to jump back from signal handler */
2922static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
2923{
084d0497 2924 int err = 0;
106ec879
FB		 2925
2926 /*
084d0497
RH		 2927 * Set up the return code ...
2928 *
2929 * li v0, __NR__foo_sigreturn
2930 * syscall
2931 */
106ec879 2932
1d8b512b
RV		 2933 __put_user(0x24020000 + syscall, tramp + 0);
2934 __put_user(0x0000000c , tramp + 1);
106ec879
FB		 2935 return err;
2936}
2937
41ecc72b 2938static inline void setup_sigcontext(CPUMIPSState *regs,
da7c8647 2939 struct target_sigcontext *sc)
106ec879 2940{
084d0497 2941 int i;
106ec879 2942
1d8b512b 2943 __put_user(exception_resume_pc(regs), &sc->sc_pc);
1239b472 2944 regs->hflags &= ~MIPS_HFLAG_BMASK;
106ec879 2945
084d0497
RH		 2946 __put_user(0, &sc->sc_regs[0]);
2947 for (i = 1; i < 32; ++i) {
1d8b512b 2948 __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
084d0497 2949 }
106ec879 2950
1d8b512b
RV		 2951 __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2952 __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
106ec879 2953
084d0497
RH		 2954 /* Rather than checking for dsp existence, always copy. The storage
2955 would just be garbage otherwise. */
1d8b512b
RV		 2956 __put_user(regs->active_tc.HI[1], &sc->sc_hi1);
2957 __put_user(regs->active_tc.HI[2], &sc->sc_hi2);
2958 __put_user(regs->active_tc.HI[3], &sc->sc_hi3);
2959 __put_user(regs->active_tc.LO[1], &sc->sc_lo1);
2960 __put_user(regs->active_tc.LO[2], &sc->sc_lo2);
2961 __put_user(regs->active_tc.LO[3], &sc->sc_lo3);
084d0497
RH		 2962 {
2963 uint32_t dsp = cpu_rddsp(0x3ff, regs);
1d8b512b 2964 __put_user(dsp, &sc->sc_dsp);
106ec879 2965 }
106ec879 2966
1d8b512b 2967 __put_user(1, &sc->sc_used_math);
106ec879 2968
084d0497 2969 for (i = 0; i < 32; ++i) {
1d8b512b 2970 __put_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
106ec879 2971 }
106ec879
FB		 2972}
2973
016d2e1d 2974static inline void
05390248 2975restore_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc)
106ec879 2976{
084d0497 2977 int i;
106ec879 2978
1d8b512b 2979 __get_user(regs->CP0_EPC, &sc->sc_pc);
106ec879 2980
1d8b512b
RV		 2981 __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
2982 __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
106ec879 2983
084d0497 2984 for (i = 1; i < 32; ++i) {
1d8b512b 2985 __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
106ec879 2986 }
106ec879 2987
1d8b512b
RV		 2988 __get_user(regs->active_tc.HI[1], &sc->sc_hi1);
2989 __get_user(regs->active_tc.HI[2], &sc->sc_hi2);
2990 __get_user(regs->active_tc.HI[3], &sc->sc_hi3);
2991 __get_user(regs->active_tc.LO[1], &sc->sc_lo1);
2992 __get_user(regs->active_tc.LO[2], &sc->sc_lo2);
2993 __get_user(regs->active_tc.LO[3], &sc->sc_lo3);
084d0497
RH		 2994 {
2995 uint32_t dsp;
1d8b512b 2996 __get_user(dsp, &sc->sc_dsp);
084d0497
RH		 2997 cpu_wrdsp(dsp, 0x3ff, regs);
2998 }
106ec879 2999
084d0497 3000 for (i = 0; i < 32; ++i) {
1d8b512b 3001 __get_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
106ec879 3002 }
106ec879 3003}
ff970904 3004
106ec879
FB		 3005/*
3006 * Determine which stack to use..
3007 */
579a97f7 3008static inline abi_ulong
05390248 3009get_sigframe(struct target_sigaction *ka, CPUMIPSState *regs, size_t frame_size)
106ec879
FB		 3010{
3011 unsigned long sp;
3012
3013 /* Default to using normal stack */
b5dc7732 3014 sp = regs->active_tc.gpr[29];
106ec879
FB		 3015
3016 /*
93148aa5 3017 * FPU emulator may have its own trampoline active just
106ec879
FB		 3018 * above the user stack, 16-bytes before the next lowest
3019 * 16 byte boundary. Try to avoid trashing it.
3020 */
3021 sp -= 32;
3022
106ec879 3023 /* This is the X/Open sanctioned signal stack switching. */
624f7979 3024 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
a04e134a
TS		 3025 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3026 }
106ec879 3027
579a97f7 3028 return (sp - frame_size) & ~7;
106ec879
FB		 3029}
3030
ea3164aa
KCY		 3031static void mips_set_hflags_isa_mode_from_pc(CPUMIPSState *env)
3032{
3033 if (env->insn_flags & (ASE_MIPS16 | ASE_MICROMIPS)) {
3034 env->hflags &= ~MIPS_HFLAG_M16;
3035 env->hflags |= (env->active_tc.PC & 1) << MIPS_HFLAG_M16_SHIFT;
3036 env->active_tc.PC &= ~(target_ulong) 1;
3037 }
3038}
3039
ff970904 3040# if defined(TARGET_ABI_MIPSO32)
579a97f7 3041/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
624f7979 3042static void setup_frame(int sig, struct target_sigaction * ka,
05390248 3043 target_sigset_t *set, CPUMIPSState *regs)
106ec879
FB		 3044{
3045 struct sigframe *frame;
579a97f7 3046 abi_ulong frame_addr;
106ec879
FB		 3047 int i;
3048
579a97f7 3049 frame_addr = get_sigframe(ka, regs, sizeof(*frame));
c8ee0a44 3050 trace_user_setup_frame(regs, frame_addr);
da7c8647
TB		 3051 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3052 goto give_sigsegv;
3053 }
106ec879
FB		 3054
3055 install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
3056
41ecc72b 3057 setup_sigcontext(regs, &frame->sf_sc);
106ec879
FB		 3058
3059 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
0188fadb 3060 __put_user(set->sig[i], &frame->sf_mask.sig[i]);
106ec879
FB		 3061 }
3062
3063 /*
3064 * Arguments to signal handler:
3065 *
3066 * a0 = signal number
3067 * a1 = 0 (should be cause)
3068 * a2 = pointer to struct sigcontext
3069 *
3070 * $25 and PC point to the signal handler, $29 points to the
3071 * struct sigframe.
3072 */
b5dc7732
TS		 3073 regs->active_tc.gpr[ 4] = sig;
3074 regs->active_tc.gpr[ 5] = 0;
3075 regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
3076 regs->active_tc.gpr[29] = frame_addr;
3077 regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
106ec879
FB		 3078 /* The original kernel code sets CP0_EPC to the handler
3079 * since it returns to userland using eret
3080 * we cannot do this here, and we must set PC directly */
b5dc7732 3081 regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
ea3164aa 3082 mips_set_hflags_isa_mode_from_pc(regs);
579a97f7 3083 unlock_user_struct(frame, frame_addr, 1);
106ec879
FB		 3084 return;
3085
3086give_sigsegv:
09391669 3087 force_sigsegv(sig);
106ec879
FB		 3088}
3089
05390248 3090long do_sigreturn(CPUMIPSState *regs)
106ec879 3091{
388bb21a 3092 struct sigframe *frame;
579a97f7 3093 abi_ulong frame_addr;
388bb21a 3094 sigset_t blocked;
c227f099 3095 target_sigset_t target_set;
388bb21a 3096 int i;
106ec879 3097
b5dc7732 3098 frame_addr = regs->active_tc.gpr[29];
c8ee0a44 3099 trace_user_do_sigreturn(regs, frame_addr);
579a97f7 3100 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
da7c8647 3101 goto badframe;
106ec879 3102
388bb21a 3103 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
f5f601af 3104 __get_user(target_set.sig[i], &frame->sf_mask.sig[i]);
388bb21a 3105 }
106ec879 3106
388bb21a 3107 target_to_host_sigset_internal(&blocked, &target_set);
9eede5b6 3108 set_sigmask(&blocked);
106ec879 3109
016d2e1d 3110 restore_sigcontext(regs, &frame->sf_sc);
106ec879
FB		 3111
3112#if 0
388bb21a
TS		 3113 /*
3114 * Don't let your children do this ...
3115 */
3116 __asm__ __volatile__(
106ec879
FB		 3117 "move\t$29, %0\n\t"
3118 "j\tsyscall_exit"
3119 :/* no outputs */
3120 :"r" (&regs));
388bb21a 3121 /* Unreached */
106ec879 3122#endif
3b46e624 3123
b5dc7732 3124 regs->active_tc.PC = regs->CP0_EPC;
ea3164aa 3125 mips_set_hflags_isa_mode_from_pc(regs);
388bb21a 3126 /* I am not sure this is right, but it seems to work
106ec879
FB		 3127 * maybe a problem with nested signals ? */
3128 regs->CP0_EPC = 0;
0b1bcb00 3129 return -TARGET_QEMU_ESIGRETURN;
106ec879
FB		 3130
3131badframe:
c599d4d6
PM		 3132 force_sig(TARGET_SIGSEGV);
3133 return -TARGET_QEMU_ESIGRETURN;
106ec879 3134}
ff970904 3135# endif /* O32 */
106ec879 3136
624f7979 3137static void setup_rt_frame(int sig, struct target_sigaction *ka,
c227f099 3138 target_siginfo_t *info,
05390248 3139 target_sigset_t *set, CPUMIPSState *env)
106ec879 3140{
0b1bcb00
PB		 3141 struct target_rt_sigframe *frame;
3142 abi_ulong frame_addr;
3143 int i;
3144
3145 frame_addr = get_sigframe(ka, env, sizeof(*frame));
c8ee0a44 3146 trace_user_setup_rt_frame(env, frame_addr);
da7c8647
TB		 3147 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3148 goto give_sigsegv;
3149 }
0b1bcb00
PB		 3150
3151 install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn);
3152
f6c7a05b 3153 tswap_siginfo(&frame->rs_info, info);
0b1bcb00 3154
60e99246
AJ		 3155 __put_user(0, &frame->rs_uc.tuc_flags);
3156 __put_user(0, &frame->rs_uc.tuc_link);
3157 __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp);
3158 __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size);
0b1bcb00 3159 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
60e99246 3160 &frame->rs_uc.tuc_stack.ss_flags);
0b1bcb00 3161
60e99246 3162 setup_sigcontext(env, &frame->rs_uc.tuc_mcontext);
0b1bcb00
PB		 3163
3164 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
60e99246 3165 __put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]);
0b1bcb00
PB		 3166 }
3167
3168 /*
3169 * Arguments to signal handler:
3170 *
3171 * a0 = signal number
02d2bd5d 3172 * a1 = pointer to siginfo_t
0b1bcb00
PB		 3173 * a2 = pointer to struct ucontext
3174 *
3175 * $25 and PC point to the signal handler, $29 points to the
3176 * struct sigframe.
3177 */
3178 env->active_tc.gpr[ 4] = sig;
3179 env->active_tc.gpr[ 5] = frame_addr
3180 + offsetof(struct target_rt_sigframe, rs_info);
3181 env->active_tc.gpr[ 6] = frame_addr
3182 + offsetof(struct target_rt_sigframe, rs_uc);
3183 env->active_tc.gpr[29] = frame_addr;
3184 env->active_tc.gpr[31] = frame_addr
3185 + offsetof(struct target_rt_sigframe, rs_code);
3186 /* The original kernel code sets CP0_EPC to the handler
3187 * since it returns to userland using eret
3188 * we cannot do this here, and we must set PC directly */
3189 env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
ea3164aa 3190 mips_set_hflags_isa_mode_from_pc(env);
0b1bcb00
PB		 3191 unlock_user_struct(frame, frame_addr, 1);
3192 return;
3193
3194give_sigsegv:
3195 unlock_user_struct(frame, frame_addr, 1);
09391669 3196 force_sigsegv(sig);
106ec879
FB		 3197}
3198
05390248 3199long do_rt_sigreturn(CPUMIPSState *env)
106ec879 3200{
0b1bcb00
PB		 3201 struct target_rt_sigframe *frame;
3202 abi_ulong frame_addr;
3203 sigset_t blocked;
3204
0b1bcb00 3205 frame_addr = env->active_tc.gpr[29];
c8ee0a44 3206 trace_user_do_rt_sigreturn(env, frame_addr);
da7c8647
TB		 3207 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
3208 goto badframe;
3209 }
0b1bcb00 3210
60e99246 3211 target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask);
9eede5b6 3212 set_sigmask(&blocked);
0b1bcb00 3213
016d2e1d 3214 restore_sigcontext(env, &frame->rs_uc.tuc_mcontext);
0b1bcb00
PB		 3215
3216 if (do_sigaltstack(frame_addr +
da7c8647
TB		 3217 offsetof(struct target_rt_sigframe, rs_uc.tuc_stack),
3218 0, get_sp_from_cpustate(env)) == -EFAULT)
0b1bcb00
PB		 3219 goto badframe;
3220
3221 env->active_tc.PC = env->CP0_EPC;
ea3164aa 3222 mips_set_hflags_isa_mode_from_pc(env);
0b1bcb00
PB		 3223 /* I am not sure this is right, but it seems to work
3224 * maybe a problem with nested signals ? */
3225 env->CP0_EPC = 0;
3226 return -TARGET_QEMU_ESIGRETURN;
3227
3228badframe:
c599d4d6
PM		 3229 force_sig(TARGET_SIGSEGV);
3230 return -TARGET_QEMU_ESIGRETURN;
106ec879 3231}
6d5e216d 3232
c3b5bc8a
TS		 3233#elif defined(TARGET_SH4)
3234
3235/*
3236 * code and data structures from linux kernel:
3237 * include/asm-sh/sigcontext.h
3238 * arch/sh/kernel/signal.c
3239 */
3240
3241struct target_sigcontext {
3242 target_ulong oldmask;
3243
3244 /* CPU registers */
3245 target_ulong sc_gregs[16];
3246 target_ulong sc_pc;
3247 target_ulong sc_pr;
3248 target_ulong sc_sr;
3249 target_ulong sc_gbr;
3250 target_ulong sc_mach;
3251 target_ulong sc_macl;
3252
3253 /* FPU registers */
3254 target_ulong sc_fpregs[16];
3255 target_ulong sc_xfpregs[16];
3256 unsigned int sc_fpscr;
3257 unsigned int sc_fpul;
3258 unsigned int sc_ownedfp;
3259};
3260
3261struct target_sigframe
3262{
3263 struct target_sigcontext sc;
3264 target_ulong extramask[TARGET_NSIG_WORDS-1];
3265 uint16_t retcode[3];
3266};
3267
3268
3269struct target_ucontext {
60e99246
AJ		 3270 target_ulong tuc_flags;
3271 struct target_ucontext *tuc_link;
3272 target_stack_t tuc_stack;
3273 struct target_sigcontext tuc_mcontext;
3274 target_sigset_t tuc_sigmask; /* mask last for extensibility */
c3b5bc8a
TS		 3275};
3276
3277struct target_rt_sigframe
3278{
3279 struct target_siginfo info;
3280 struct target_ucontext uc;
3281 uint16_t retcode[3];
3282};
3283
3284
3285#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
3286#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
3287
624f7979 3288static abi_ulong get_sigframe(struct target_sigaction *ka,
da7c8647 3289 unsigned long sp, size_t frame_size)
c3b5bc8a 3290{
624f7979 3291 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) {
c3b5bc8a
TS		 3292 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
3293 }
3294
3295 return (sp - frame_size) & -8ul;
3296}
3297
41ecc72b 3298static void setup_sigcontext(struct target_sigcontext *sc,
da7c8647 3299 CPUSH4State *regs, unsigned long mask)
c3b5bc8a 3300{
d8714436 3301 int i;
c3b5bc8a 3302
1d8b512b 3303#define COPY(x) __put_user(regs->x, &sc->sc_##x)
c3b5bc8a
TS		 3304 COPY(gregs[0]); COPY(gregs[1]);
3305 COPY(gregs[2]); COPY(gregs[3]);
3306 COPY(gregs[4]); COPY(gregs[5]);
3307 COPY(gregs[6]); COPY(gregs[7]);
3308 COPY(gregs[8]); COPY(gregs[9]);
3309 COPY(gregs[10]); COPY(gregs[11]);
3310 COPY(gregs[12]); COPY(gregs[13]);
3311 COPY(gregs[14]); COPY(gregs[15]);
3312 COPY(gbr); COPY(mach);
3313 COPY(macl); COPY(pr);
3314 COPY(sr); COPY(pc);
3315#undef COPY
3316
d8714436 3317 for (i=0; i<16; i++) {
1d8b512b 3318 __put_user(regs->fregs[i], &sc->sc_fpregs[i]);
d8714436 3319 }
1d8b512b
RV		 3320 __put_user(regs->fpscr, &sc->sc_fpscr);
3321 __put_user(regs->fpul, &sc->sc_fpul);
c3b5bc8a
TS		 3322
3323 /* non-iBCS2 extensions.. */
1d8b512b 3324 __put_user(mask, &sc->oldmask);
c3b5bc8a
TS		 3325}
3326
ba412496 3327static void restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc)
c3b5bc8a 3328{
d8714436 3329 int i;
c3b5bc8a 3330
1d8b512b 3331#define COPY(x) __get_user(regs->x, &sc->sc_##x)
ba412496 3332 COPY(gregs[0]); COPY(gregs[1]);
c3b5bc8a
TS		 3333 COPY(gregs[2]); COPY(gregs[3]);
3334 COPY(gregs[4]); COPY(gregs[5]);
3335 COPY(gregs[6]); COPY(gregs[7]);
3336 COPY(gregs[8]); COPY(gregs[9]);
3337 COPY(gregs[10]); COPY(gregs[11]);
3338 COPY(gregs[12]); COPY(gregs[13]);
3339 COPY(gregs[14]); COPY(gregs[15]);
3340 COPY(gbr); COPY(mach);
3341 COPY(macl); COPY(pr);
3342 COPY(sr); COPY(pc);
3343#undef COPY
3344
d8714436 3345 for (i=0; i<16; i++) {
1d8b512b 3346 __get_user(regs->fregs[i], &sc->sc_fpregs[i]);
d8714436 3347 }
1d8b512b
RV		 3348 __get_user(regs->fpscr, &sc->sc_fpscr);
3349 __get_user(regs->fpul, &sc->sc_fpul);
c3b5bc8a
TS		 3350
3351 regs->tra = -1; /* disable syscall checks */
c3b5bc8a
TS		 3352}
3353
624f7979 3354static void setup_frame(int sig, struct target_sigaction *ka,
05390248 3355 target_sigset_t *set, CPUSH4State *regs)
c3b5bc8a
TS		 3356{
3357 struct target_sigframe *frame;
3358 abi_ulong frame_addr;
3359 int i;
c3b5bc8a
TS		 3360
3361 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
c8ee0a44 3362 trace_user_setup_frame(regs, frame_addr);
da7c8647
TB		 3363 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3364 goto give_sigsegv;
3365 }
c3b5bc8a 3366
41ecc72b 3367 setup_sigcontext(&frame->sc, regs, set->sig[0]);
c3b5bc8a
TS		 3368
3369 for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
1d8b512b 3370 __put_user(set->sig[i + 1], &frame->extramask[i]);
c3b5bc8a
TS		 3371 }
3372
3373 /* Set up to return from userspace. If provided, use a stub
3374 already in userspace. */
624f7979
PB		 3375 if (ka->sa_flags & TARGET_SA_RESTORER) {
3376 regs->pr = (unsigned long) ka->sa_restorer;
c3b5bc8a
TS		 3377 } else {
3378 /* Generate return code (system call to sigreturn) */
2a0fa68f
LV		 3379 abi_ulong retcode_addr = frame_addr +
3380 offsetof(struct target_sigframe, retcode);
1d8b512b
RV		 3381 __put_user(MOVW(2), &frame->retcode[0]);
3382 __put_user(TRAP_NOARG, &frame->retcode[1]);
3383 __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
2a0fa68f 3384 regs->pr = (unsigned long) retcode_addr;
c3b5bc8a
TS		 3385 }
3386
c3b5bc8a 3387 /* Set up registers for signal handler */
cb9c6268 3388 regs->gregs[15] = frame_addr;
b6e2c935 3389 regs->gregs[4] = sig; /* Arg for signal handler */
c3b5bc8a 3390 regs->gregs[5] = 0;
cb9c6268 3391 regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc);
624f7979 3392 regs->pc = (unsigned long) ka->_sa_handler;
c3b5bc8a
TS		 3393
3394 unlock_user_struct(frame, frame_addr, 1);
3395 return;
3396
3397give_sigsegv:
3398 unlock_user_struct(frame, frame_addr, 1);
09391669 3399 force_sigsegv(sig);
c3b5bc8a
TS		 3400}
3401
624f7979 3402static void setup_rt_frame(int sig, struct target_sigaction *ka,
c227f099 3403 target_siginfo_t *info,
05390248 3404 target_sigset_t *set, CPUSH4State *regs)
c3b5bc8a
TS		 3405{
3406 struct target_rt_sigframe *frame;
3407 abi_ulong frame_addr;
3408 int i;
c3b5bc8a
TS		 3409
3410 frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
c8ee0a44 3411 trace_user_setup_rt_frame(regs, frame_addr);
da7c8647
TB		 3412 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
3413 goto give_sigsegv;
3414 }
c3b5bc8a 3415
f6c7a05b 3416 tswap_siginfo(&frame->info, info);
c3b5bc8a
TS		 3417
3418 /* Create the ucontext. */
1d8b512b
RV		 3419 __put_user(0, &frame->uc.tuc_flags);
3420 __put_user(0, (unsigned long *)&frame->uc.tuc_link);
3421 __put_user((unsigned long)target_sigaltstack_used.ss_sp,
3422 &frame->uc.tuc_stack.ss_sp);
3423 __put_user(sas_ss_flags(regs->gregs[15]),
3424 &frame->uc.tuc_stack.ss_flags);
3425 __put_user(target_sigaltstack_used.ss_size,
3426 &frame->uc.tuc_stack.ss_size);
3427 setup_sigcontext(&frame->uc.tuc_mcontext,
da7c8647 3428 regs, set->sig[0]);
c3b5bc8a 3429 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1d8b512b 3430 __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
c3b5bc8a
TS		 3431 }
3432
3433 /* Set up to return from userspace. If provided, use a stub
3434 already in userspace. */
624f7979
PB		 3435 if (ka->sa_flags & TARGET_SA_RESTORER) {
3436 regs->pr = (unsigned long) ka->sa_restorer;
c3b5bc8a
TS		 3437 } else {
3438 /* Generate return code (system call to sigreturn) */
2a0fa68f
LV		 3439 abi_ulong retcode_addr = frame_addr +
3440 offsetof(struct target_rt_sigframe, retcode);
1d8b512b
RV		 3441 __put_user(MOVW(2), &frame->retcode[0]);
3442 __put_user(TRAP_NOARG, &frame->retcode[1]);
3443 __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
2a0fa68f 3444 regs->pr = (unsigned long) retcode_addr;
c3b5bc8a
TS		 3445 }
3446
c3b5bc8a 3447 /* Set up registers for signal handler */
cb9c6268 3448 regs->gregs[15] = frame_addr;
b6e2c935 3449 regs->gregs[4] = sig; /* Arg for signal handler */
cb9c6268
EI		 3450 regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info);
3451 regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc);
624f7979 3452 regs->pc = (unsigned long) ka->_sa_handler;
c3b5bc8a
TS		 3453
3454 unlock_user_struct(frame, frame_addr, 1);
3455 return;
3456
3457give_sigsegv:
3458 unlock_user_struct(frame, frame_addr, 1);
09391669 3459 force_sigsegv(sig);
c3b5bc8a
TS		 3460}
3461
05390248 3462long do_sigreturn(CPUSH4State *regs)
c3b5bc8a
TS		 3463{
3464 struct target_sigframe *frame;
3465 abi_ulong frame_addr;
3466 sigset_t blocked;
c227f099 3467 target_sigset_t target_set;
c3b5bc8a
TS		 3468 int i;
3469 int err = 0;
3470
c3b5bc8a 3471 frame_addr = regs->gregs[15];
c8ee0a44 3472 trace_user_do_sigreturn(regs, frame_addr);
da7c8647
TB		 3473 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
3474 goto badframe;
3475 }
c3b5bc8a 3476
1d8b512b 3477 __get_user(target_set.sig[0], &frame->sc.oldmask);
c3b5bc8a 3478 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
1d8b512b 3479 __get_user(target_set.sig[i], &frame->extramask[i - 1]);
c3b5bc8a
TS		 3480 }
3481
3482 if (err)
3483 goto badframe;
3484
3485 target_to_host_sigset_internal(&blocked, &target_set);
9eede5b6 3486 set_sigmask(&blocked);
c3b5bc8a 3487
ba412496 3488 restore_sigcontext(regs, &frame->sc);
c3b5bc8a
TS		 3489
3490 unlock_user_struct(frame, frame_addr, 0);
ba412496 3491 return -TARGET_QEMU_ESIGRETURN;
c3b5bc8a
TS		 3492
3493badframe:
3494 unlock_user_struct(frame, frame_addr, 0);
3495 force_sig(TARGET_SIGSEGV);
c599d4d6 3496 return -TARGET_QEMU_ESIGRETURN;
c3b5bc8a
TS		 3497}
3498
05390248 3499long do_rt_sigreturn(CPUSH4State *regs)
c3b5bc8a
TS		 3500{
3501 struct target_rt_sigframe *frame;
3502 abi_ulong frame_addr;
3503 sigset_t blocked;
3504
c3b5bc8a 3505 frame_addr = regs->gregs[15];
c8ee0a44 3506 trace_user_do_rt_sigreturn(regs, frame_addr);
da7c8647
TB		 3507 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
3508 goto badframe;
3509 }
c3b5bc8a 3510
60e99246 3511 target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask);
9eede5b6 3512 set_sigmask(&blocked);
c3b5bc8a 3513
ba412496 3514 restore_sigcontext(regs, &frame->uc.tuc_mcontext);
c3b5bc8a
TS		 3515
3516 if (do_sigaltstack(frame_addr +
da7c8647
TB		 3517 offsetof(struct target_rt_sigframe, uc.tuc_stack),
3518 0, get_sp_from_cpustate(regs)) == -EFAULT) {
c3b5bc8a 3519 goto badframe;
da7c8647 3520 }
c3b5bc8a
TS		 3521
3522 unlock_user_struct(frame, frame_addr, 0);
ba412496 3523 return -TARGET_QEMU_ESIGRETURN;
c3b5bc8a
TS		 3524
3525badframe:
3526 unlock_user_struct(frame, frame_addr, 0);
3527 force_sig(TARGET_SIGSEGV);
c599d4d6 3528 return -TARGET_QEMU_ESIGRETURN;
c3b5bc8a 3529}
b779e29e
EI		 3530#elif defined(TARGET_MICROBLAZE)
3531
3532struct target_sigcontext {
3533 struct target_pt_regs regs; /* needs to be first */
3534 uint32_t oldmask;
3535};
3536
b2178704
EI		 3537struct target_stack_t {
3538 abi_ulong ss_sp;
3539 int ss_flags;
3540 unsigned int ss_size;
3541};
3542
3543struct target_ucontext {
f711df67
RH		 3544 abi_ulong tuc_flags;
3545 abi_ulong tuc_link;
3546 struct target_stack_t tuc_stack;
3547 struct target_sigcontext tuc_mcontext;
3548 uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1];
b2178704
EI		 3549};
3550
b779e29e
EI		 3551/* Signal frames. */
3552struct target_signal_frame {
b2178704 3553 struct target_ucontext uc;
b779e29e
EI		 3554 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3555 uint32_t tramp[2];
3556};
3557
3558struct rt_signal_frame {
02d2bd5d 3559 siginfo_t info;
b779e29e
EI		 3560 struct ucontext uc;
3561 uint32_t tramp[2];
3562};
3563
05390248 3564static void setup_sigcontext(struct target_sigcontext *sc, CPUMBState *env)
b779e29e
EI		 3565{
3566 __put_user(env->regs[0], &sc->regs.r0);
3567 __put_user(env->regs[1], &sc->regs.r1);
3568 __put_user(env->regs[2], &sc->regs.r2);
3569 __put_user(env->regs[3], &sc->regs.r3);
3570 __put_user(env->regs[4], &sc->regs.r4);
3571 __put_user(env->regs[5], &sc->regs.r5);
3572 __put_user(env->regs[6], &sc->regs.r6);
3573 __put_user(env->regs[7], &sc->regs.r7);
3574 __put_user(env->regs[8], &sc->regs.r8);
3575 __put_user(env->regs[9], &sc->regs.r9);
3576 __put_user(env->regs[10], &sc->regs.r10);
3577 __put_user(env->regs[11], &sc->regs.r11);
3578 __put_user(env->regs[12], &sc->regs.r12);
3579 __put_user(env->regs[13], &sc->regs.r13);
3580 __put_user(env->regs[14], &sc->regs.r14);
3581 __put_user(env->regs[15], &sc->regs.r15);
3582 __put_user(env->regs[16], &sc->regs.r16);
3583 __put_user(env->regs[17], &sc->regs.r17);
3584 __put_user(env->regs[18], &sc->regs.r18);
3585 __put_user(env->regs[19], &sc->regs.r19);
3586 __put_user(env->regs[20], &sc->regs.r20);
3587 __put_user(env->regs[21], &sc->regs.r21);
3588 __put_user(env->regs[22], &sc->regs.r22);
3589 __put_user(env->regs[23], &sc->regs.r23);
3590 __put_user(env->regs[24], &sc->regs.r24);
3591 __put_user(env->regs[25], &sc->regs.r25);
3592 __put_user(env->regs[26], &sc->regs.r26);
3593 __put_user(env->regs[27], &sc->regs.r27);
3594 __put_user(env->regs[28], &sc->regs.r28);
3595 __put_user(env->regs[29], &sc->regs.r29);
3596 __put_user(env->regs[30], &sc->regs.r30);
3597 __put_user(env->regs[31], &sc->regs.r31);
3598 __put_user(env->sregs[SR_PC], &sc->regs.pc);
3599}
3600
05390248 3601static void restore_sigcontext(struct target_sigcontext *sc, CPUMBState *env)
b779e29e
EI		 3602{
3603 __get_user(env->regs[0], &sc->regs.r0);
3604 __get_user(env->regs[1], &sc->regs.r1);
3605 __get_user(env->regs[2], &sc->regs.r2);
3606 __get_user(env->regs[3], &sc->regs.r3);
3607 __get_user(env->regs[4], &sc->regs.r4);
3608 __get_user(env->regs[5], &sc->regs.r5);
3609 __get_user(env->regs[6], &sc->regs.r6);
3610 __get_user(env->regs[7], &sc->regs.r7);
3611 __get_user(env->regs[8], &sc->regs.r8);
3612 __get_user(env->regs[9], &sc->regs.r9);
3613 __get_user(env->regs[10], &sc->regs.r10);
3614 __get_user(env->regs[11], &sc->regs.r11);
3615 __get_user(env->regs[12], &sc->regs.r12);
3616 __get_user(env->regs[13], &sc->regs.r13);
3617 __get_user(env->regs[14], &sc->regs.r14);
3618 __get_user(env->regs[15], &sc->regs.r15);
3619 __get_user(env->regs[16], &sc->regs.r16);
3620 __get_user(env->regs[17], &sc->regs.r17);
3621 __get_user(env->regs[18], &sc->regs.r18);
3622 __get_user(env->regs[19], &sc->regs.r19);
3623 __get_user(env->regs[20], &sc->regs.r20);
3624 __get_user(env->regs[21], &sc->regs.r21);
3625 __get_user(env->regs[22], &sc->regs.r22);
3626 __get_user(env->regs[23], &sc->regs.r23);
3627 __get_user(env->regs[24], &sc->regs.r24);
3628 __get_user(env->regs[25], &sc->regs.r25);
3629 __get_user(env->regs[26], &sc->regs.r26);
3630 __get_user(env->regs[27], &sc->regs.r27);
3631 __get_user(env->regs[28], &sc->regs.r28);
3632 __get_user(env->regs[29], &sc->regs.r29);
3633 __get_user(env->regs[30], &sc->regs.r30);
3634 __get_user(env->regs[31], &sc->regs.r31);
3635 __get_user(env->sregs[SR_PC], &sc->regs.pc);
3636}
3637
3638static abi_ulong get_sigframe(struct target_sigaction *ka,
05390248 3639 CPUMBState *env, int frame_size)
b779e29e
EI		 3640{
3641 abi_ulong sp = env->regs[1];
3642
b545f63f 3643 if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !on_sig_stack(sp)) {
b779e29e 3644 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
b545f63f 3645 }
b779e29e
EI		 3646
3647 return ((sp - frame_size) & -8UL);
3648}
3649
3650static void setup_frame(int sig, struct target_sigaction *ka,
05390248 3651 target_sigset_t *set, CPUMBState *env)
b779e29e
EI		 3652{
3653 struct target_signal_frame *frame;
3654 abi_ulong frame_addr;
b779e29e
EI		 3655 int i;
3656
3657 frame_addr = get_sigframe(ka, env, sizeof *frame);
c8ee0a44 3658 trace_user_setup_frame(env, frame_addr);
b779e29e
EI		 3659 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3660 goto badframe;
3661
3662 /* Save the mask. */
1d8b512b 3663 __put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask);
b779e29e
EI		 3664
3665 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
0188fadb 3666 __put_user(set->sig[i], &frame->extramask[i - 1]);
b779e29e
EI		 3667 }
3668
f711df67 3669 setup_sigcontext(&frame->uc.tuc_mcontext, env);
b779e29e
EI		 3670
3671 /* Set up to return from userspace. If provided, use a stub
3672 already in userspace. */
3673 /* minus 8 is offset to cater for "rtsd r15,8" offset */
3674 if (ka->sa_flags & TARGET_SA_RESTORER) {
3675 env->regs[15] = ((unsigned long)ka->sa_restorer)-8;
3676 } else {
3677 uint32_t t;
3678 /* Note, these encodings are _big endian_! */
3679 /* addi r12, r0, __NR_sigreturn */
3680 t = 0x31800000UL | TARGET_NR_sigreturn;
1d8b512b 3681 __put_user(t, frame->tramp + 0);
b779e29e
EI		 3682 /* brki r14, 0x8 */
3683 t = 0xb9cc0008UL;
1d8b512b 3684 __put_user(t, frame->tramp + 1);
b779e29e
EI		 3685
3686 /* Return from sighandler will jump to the tramp.
3687 Negative 8 offset because return is rtsd r15, 8 */
166c97ed
CG		 3688 env->regs[15] = frame_addr + offsetof(struct target_signal_frame, tramp)
3689 - 8;
b779e29e
EI		 3690 }
3691
b779e29e 3692 /* Set up registers for signal handler */
cb9c6268 3693 env->regs[1] = frame_addr;
b779e29e
EI		 3694 /* Signal handler args: */
3695 env->regs[5] = sig; /* Arg 0: signum */
187b4e08 3696 env->regs[6] = 0;
cb9c6268
EI		 3697 /* arg 1: sigcontext */
3698 env->regs[7] = frame_addr += offsetof(typeof(*frame), uc);
b779e29e
EI		 3699
3700 /* Offset of 4 to handle microblaze rtid r14, 0 */
3701 env->sregs[SR_PC] = (unsigned long)ka->_sa_handler;
3702
3703 unlock_user_struct(frame, frame_addr, 1);
3704 return;
da7c8647 3705badframe:
09391669 3706 force_sigsegv(sig);
b779e29e
EI		 3707}
3708
3709static void setup_rt_frame(int sig, struct target_sigaction *ka,
c227f099 3710 target_siginfo_t *info,
05390248 3711 target_sigset_t *set, CPUMBState *env)
b779e29e
EI		 3712{
3713 fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n");
3714}
3715
05390248 3716long do_sigreturn(CPUMBState *env)
b779e29e
EI		 3717{
3718 struct target_signal_frame *frame;
3719 abi_ulong frame_addr;
c227f099 3720 target_sigset_t target_set;
b779e29e
EI		 3721 sigset_t set;
3722 int i;
3723
3724 frame_addr = env->regs[R_SP];
c8ee0a44 3725 trace_user_do_sigreturn(env, frame_addr);
b779e29e
EI		 3726 /* Make sure the guest isn't playing games. */
3727 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
3728 goto badframe;
3729
3730 /* Restore blocked signals */
f5f601af 3731 __get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask);
b779e29e 3732 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
da7c8647 3733 __get_user(target_set.sig[i], &frame->extramask[i - 1]);
b779e29e
EI		 3734 }
3735 target_to_host_sigset_internal(&set, &target_set);
9eede5b6 3736 set_sigmask(&set);
b779e29e 3737
f711df67 3738 restore_sigcontext(&frame->uc.tuc_mcontext, env);
b779e29e
EI		 3739 /* We got here through a sigreturn syscall, our path back is via an
3740 rtb insn so setup r14 for that. */
3741 env->regs[14] = env->sregs[SR_PC];
da7c8647 3742
b779e29e 3743 unlock_user_struct(frame, frame_addr, 0);
4134ecfe 3744 return -TARGET_QEMU_ESIGRETURN;
da7c8647 3745badframe:
b779e29e 3746 force_sig(TARGET_SIGSEGV);
c599d4d6 3747 return -TARGET_QEMU_ESIGRETURN;
b779e29e
EI		 3748}
3749
05390248 3750long do_rt_sigreturn(CPUMBState *env)
b779e29e 3751{
c8ee0a44 3752 trace_user_do_rt_sigreturn(env, 0);
b779e29e
EI		 3753 fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n");
3754 return -TARGET_ENOSYS;
3755}
3756
b6d3abda
EI		 3757#elif defined(TARGET_CRIS)
3758
3759struct target_sigcontext {
da7c8647
TB		 3760 struct target_pt_regs regs; /* needs to be first */
3761 uint32_t oldmask;
3762 uint32_t usp; /* usp before stacking this gunk on it */
b6d3abda
EI		 3763};
3764
3765/* Signal frames. */
3766struct target_signal_frame {
da7c8647
TB		 3767 struct target_sigcontext sc;
3768 uint32_t extramask[TARGET_NSIG_WORDS - 1];
3769 uint16_t retcode[4]; /* Trampoline code. */
b6d3abda
EI		 3770};
3771
3772struct rt_signal_frame {
da7c8647
TB		 3773 siginfo_t *pinfo;
3774 void *puc;
3775 siginfo_t info;
3776 struct ucontext uc;
3777 uint16_t retcode[4]; /* Trampoline code. */
b6d3abda
EI		 3778};
3779
05390248 3780static void setup_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
b6d3abda 3781{
da7c8647
TB		 3782 __put_user(env->regs[0], &sc->regs.r0);
3783 __put_user(env->regs[1], &sc->regs.r1);
3784 __put_user(env->regs[2], &sc->regs.r2);
3785 __put_user(env->regs[3], &sc->regs.r3);
3786 __put_user(env->regs[4], &sc->regs.r4);
3787 __put_user(env->regs[5], &sc->regs.r5);
3788 __put_user(env->regs[6], &sc->regs.r6);
3789 __put_user(env->regs[7], &sc->regs.r7);
3790 __put_user(env->regs[8], &sc->regs.r8);
3791 __put_user(env->regs[9], &sc->regs.r9);
3792 __put_user(env->regs[10], &sc->regs.r10);
3793 __put_user(env->regs[11], &sc->regs.r11);
3794 __put_user(env->regs[12], &sc->regs.r12);
3795 __put_user(env->regs[13], &sc->regs.r13);
3796 __put_user(env->regs[14], &sc->usp);
3797 __put_user(env->regs[15], &sc->regs.acr);
3798 __put_user(env->pregs[PR_MOF], &sc->regs.mof);
3799 __put_user(env->pregs[PR_SRP], &sc->regs.srp);
3800 __put_user(env->pc, &sc->regs.erp);
b6d3abda 3801}
9664d928 3802
05390248 3803static void restore_sigcontext(struct target_sigcontext *sc, CPUCRISState *env)
b6d3abda 3804{
da7c8647
TB		 3805 __get_user(env->regs[0], &sc->regs.r0);
3806 __get_user(env->regs[1], &sc->regs.r1);
3807 __get_user(env->regs[2], &sc->regs.r2);
3808 __get_user(env->regs[3], &sc->regs.r3);
3809 __get_user(env->regs[4], &sc->regs.r4);
3810 __get_user(env->regs[5], &sc->regs.r5);
3811 __get_user(env->regs[6], &sc->regs.r6);
3812 __get_user(env->regs[7], &sc->regs.r7);
3813 __get_user(env->regs[8], &sc->regs.r8);
3814 __get_user(env->regs[9], &sc->regs.r9);
3815 __get_user(env->regs[10], &sc->regs.r10);
3816 __get_user(env->regs[11], &sc->regs.r11);
3817 __get_user(env->regs[12], &sc->regs.r12);
3818 __get_user(env->regs[13], &sc->regs.r13);
3819 __get_user(env->regs[14], &sc->usp);
3820 __get_user(env->regs[15], &sc->regs.acr);
3821 __get_user(env->pregs[PR_MOF], &sc->regs.mof);
3822 __get_user(env->pregs[PR_SRP], &sc->regs.srp);
3823 __get_user(env->pc, &sc->regs.erp);
9664d928
EI		 3824}
3825
05390248 3826static abi_ulong get_sigframe(CPUCRISState *env, int framesize)
9664d928 3827{
da7c8647
TB		 3828 abi_ulong sp;
3829 /* Align the stack downwards to 4. */
3830 sp = (env->regs[R_SP] & ~3);
3831 return sp - framesize;
b6d3abda
EI		 3832}
3833
624f7979 3834static void setup_frame(int sig, struct target_sigaction *ka,
05390248 3835 target_sigset_t *set, CPUCRISState *env)
b6d3abda 3836{
da7c8647
TB		 3837 struct target_signal_frame *frame;
3838 abi_ulong frame_addr;
3839 int i;
3840
3841 frame_addr = get_sigframe(env, sizeof *frame);
3842 trace_user_setup_frame(env, frame_addr);
3843 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
3844 goto badframe;
3845
3846 /*
3847 * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
3848 * use this trampoline anymore but it sets it up for GDB.
3849 * In QEMU, using the trampoline simplifies things a bit so we use it.
3850 *
3851 * This is movu.w __NR_sigreturn, r9; break 13;
3852 */
1d8b512b
RV		 3853 __put_user(0x9c5f, frame->retcode+0);
3854 __put_user(TARGET_NR_sigreturn,
3855 frame->retcode + 1);
3856 __put_user(0xe93d, frame->retcode + 2);
b6d3abda 3857
da7c8647 3858 /* Save the mask. */
1d8b512b 3859 __put_user(set->sig[0], &frame->sc.oldmask);
b6d3abda 3860
0188fadb
RV		 3861 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
3862 __put_user(set->sig[i], &frame->extramask[i - 1]);
3863 }
b6d3abda 3864
da7c8647 3865 setup_sigcontext(&frame->sc, env);
b6d3abda 3866
da7c8647
TB		 3867 /* Move the stack and setup the arguments for the handler. */
3868 env->regs[R_SP] = frame_addr;
3869 env->regs[10] = sig;
3870 env->pc = (unsigned long) ka->_sa_handler;
3871 /* Link SRP so the guest returns through the trampoline. */
3872 env->pregs[PR_SRP] = frame_addr + offsetof(typeof(*frame), retcode);
b6d3abda 3873
da7c8647
TB		 3874 unlock_user_struct(frame, frame_addr, 1);
3875 return;
3876badframe:
09391669 3877 force_sigsegv(sig);
b6d3abda
EI		 3878}
3879
624f7979 3880static void setup_rt_frame(int sig, struct target_sigaction *ka,
c227f099 3881 target_siginfo_t *info,
05390248 3882 target_sigset_t *set, CPUCRISState *env)
b6d3abda
EI		 3883{
3884 fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
3885}
3886
05390248 3887long do_sigreturn(CPUCRISState *env)
b6d3abda 3888{
da7c8647
TB		 3889 struct target_signal_frame *frame;
3890 abi_ulong frame_addr;
3891 target_sigset_t target_set;
3892 sigset_t set;
3893 int i;
b6d3abda 3894
da7c8647
TB		 3895 frame_addr = env->regs[R_SP];
3896 trace_user_do_sigreturn(env, frame_addr);
3897 /* Make sure the guest isn't playing games. */
3898 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) {
3899 goto badframe;
3900 }
b6d3abda 3901
da7c8647 3902 /* Restore blocked signals */
f5f601af 3903 __get_user(target_set.sig[0], &frame->sc.oldmask);
da7c8647 3904 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
f5f601af 3905 __get_user(target_set.sig[i], &frame->extramask[i - 1]);
da7c8647
TB		 3906 }
3907 target_to_host_sigset_internal(&set, &target_set);
9eede5b6 3908 set_sigmask(&set);
b6d3abda 3909
da7c8647
TB		 3910 restore_sigcontext(&frame->sc, env);
3911 unlock_user_struct(frame, frame_addr, 0);
62050865 3912 return -TARGET_QEMU_ESIGRETURN;
da7c8647
TB		 3913badframe:
3914 force_sig(TARGET_SIGSEGV);
c599d4d6 3915 return -TARGET_QEMU_ESIGRETURN;
b6d3abda
EI		 3916}
3917
05390248 3918long do_rt_sigreturn(CPUCRISState *env)
b6d3abda 3919{
c8ee0a44 3920 trace_user_do_rt_sigreturn(env, 0);
b6d3abda
EI		 3921 fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
3922 return -TARGET_ENOSYS;
3923}
c3b5bc8a 3924
d962783e
JL		 3925#elif defined(TARGET_OPENRISC)
3926
3927struct target_sigcontext {
3928 struct target_pt_regs regs;
3929 abi_ulong oldmask;
3930 abi_ulong usp;
3931};
3932
3933struct target_ucontext {
3934 abi_ulong tuc_flags;
3935 abi_ulong tuc_link;
3936 target_stack_t tuc_stack;
3937 struct target_sigcontext tuc_mcontext;
3938 target_sigset_t tuc_sigmask; /* mask last for extensibility */
3939};
3940
3941struct target_rt_sigframe {
3942 abi_ulong pinfo;
3943 uint64_t puc;
3944 struct target_siginfo info;
3945 struct target_sigcontext sc;
3946 struct target_ucontext uc;
3947 unsigned char retcode[16]; /* trampoline code */
3948};
3949
3950/* This is the asm-generic/ucontext.h version */
3951#if 0
3952static int restore_sigcontext(CPUOpenRISCState *regs,
3953 struct target_sigcontext *sc)
3954{
3955 unsigned int err = 0;
3956 unsigned long old_usp;
3957
3958 /* Alwys make any pending restarted system call return -EINTR */
3959 current_thread_info()->restart_block.fn = do_no_restart_syscall;
3960
3961 /* restore the regs from &sc->regs (same as sc, since regs is first)
3962 * (sc is already checked for VERIFY_READ since the sigframe was
3963 * checked in sys_sigreturn previously)
3964 */
3965
3966 if (copy_from_user(regs, &sc, sizeof(struct target_pt_regs))) {
3967 goto badframe;
3968 }
3969
3970 /* make sure the U-flag is set so user-mode cannot fool us */
3971
3972 regs->sr &= ~SR_SM;
3973
3974 /* restore the old USP as it was before we stacked the sc etc.
3975 * (we cannot just pop the sigcontext since we aligned the sp and
3976 * stuff after pushing it)
3977 */
3978
1d8b512b 3979 __get_user(old_usp, &sc->usp);
d962783e
JL		 3980 phx_signal("old_usp 0x%lx", old_usp);
3981
3982 __PHX__ REALLY /* ??? */
3983 wrusp(old_usp);
3984 regs->gpr[1] = old_usp;
3985
3986 /* TODO: the other ports use regs->orig_XX to disable syscall checks
3987 * after this completes, but we don't use that mechanism. maybe we can
3988 * use it now ?
3989 */
3990
3991 return err;
3992
3993badframe:
3994 return 1;
3995}
3996#endif
3997
3998/* Set up a signal frame. */
3999
41ecc72b 4000static void setup_sigcontext(struct target_sigcontext *sc,
da7c8647
TB		 4001 CPUOpenRISCState *regs,
4002 unsigned long mask)
d962783e 4003{
d962783e
JL		 4004 unsigned long usp = regs->gpr[1];
4005
4006 /* copy the regs. they are first in sc so we can use sc directly */
4007
1d8b512b 4008 /*copy_to_user(&sc, regs, sizeof(struct target_pt_regs));*/
d962783e
JL		 4009
4010 /* Set the frametype to CRIS_FRAME_NORMAL for the execution of
4011 the signal handler. The frametype will be restored to its previous
4012 value in restore_sigcontext. */
4013 /*regs->frametype = CRIS_FRAME_NORMAL;*/
4014
4015 /* then some other stuff */
1d8b512b 4016 __put_user(mask, &sc->oldmask);
41ecc72b 4017 __put_user(usp, &sc->usp);
d962783e
JL		 4018}
4019
4020static inline unsigned long align_sigframe(unsigned long sp)
4021{
9be38598 4022 return sp & ~3UL;
d962783e
JL		 4023}
4024
4025static inline abi_ulong get_sigframe(struct target_sigaction *ka,
4026 CPUOpenRISCState *regs,
4027 size_t frame_size)
4028{
4029 unsigned long sp = regs->gpr[1];
4030 int onsigstack = on_sig_stack(sp);
4031
4032 /* redzone */
4033 /* This is the X/Open sanctioned signal stack switching. */
b545f63f 4034 if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !onsigstack) {
d962783e
JL		 4035 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
4036 }
4037
4038 sp = align_sigframe(sp - frame_size);
4039
4040 /*
4041 * If we are on the alternate signal stack and would overflow it, don't.
4042 * Return an always-bogus address instead so we will die with SIGSEGV.
4043 */
4044
4045 if (onsigstack && !likely(on_sig_stack(sp))) {
4046 return -1L;
4047 }
4048
4049 return sp;
4050}
4051
d962783e
JL		 4052static void setup_rt_frame(int sig, struct target_sigaction *ka,
4053 target_siginfo_t *info,
4054 target_sigset_t *set, CPUOpenRISCState *env)
4055{
4056 int err = 0;
4057 abi_ulong frame_addr;
4058 unsigned long return_ip;
4059 struct target_rt_sigframe *frame;
4060 abi_ulong info_addr, uc_addr;
4061
d962783e 4062 frame_addr = get_sigframe(ka, env, sizeof(*frame));
c8ee0a44 4063 trace_user_setup_rt_frame(env, frame_addr);
d962783e
JL		 4064 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
4065 goto give_sigsegv;
4066 }
4067
4068 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
1d8b512b 4069 __put_user(info_addr, &frame->pinfo);
d962783e 4070 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
1d8b512b 4071 __put_user(uc_addr, &frame->puc);
d962783e
JL		 4072
4073 if (ka->sa_flags & SA_SIGINFO) {
f6c7a05b 4074 tswap_siginfo(&frame->info, info);
d962783e
JL		 4075 }
4076
4077 /*err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));*/
1d8b512b
RV		 4078 __put_user(0, &frame->uc.tuc_flags);
4079 __put_user(0, &frame->uc.tuc_link);
4080 __put_user(target_sigaltstack_used.ss_sp,
4081 &frame->uc.tuc_stack.ss_sp);
4082 __put_user(sas_ss_flags(env->gpr[1]), &frame->uc.tuc_stack.ss_flags);
4083 __put_user(target_sigaltstack_used.ss_size,
4084 &frame->uc.tuc_stack.ss_size);
41ecc72b 4085 setup_sigcontext(&frame->sc, env, set->sig[0]);
d962783e
JL		 4086
4087 /*err |= copy_to_user(frame->uc.tuc_sigmask, set, sizeof(*set));*/
4088
d962783e
JL		 4089 /* trampoline - the desired return ip is the retcode itself */
4090 return_ip = (unsigned long)&frame->retcode;
4091 /* This is l.ori r11,r0,__NR_sigreturn, l.sys 1 */
1d8b512b
RV		 4092 __put_user(0xa960, (short *)(frame->retcode + 0));
4093 __put_user(TARGET_NR_rt_sigreturn, (short *)(frame->retcode + 2));
4094 __put_user(0x20000001, (unsigned long *)(frame->retcode + 4));
4095 __put_user(0x15000000, (unsigned long *)(frame->retcode + 8));
d962783e
JL		 4096
4097 if (err) {
4098 goto give_sigsegv;
4099 }
4100
4101 /* TODO what is the current->exec_domain stuff and invmap ? */
4102
4103 /* Set up registers for signal handler */
4104 env->pc = (unsigned long)ka->_sa_handler; /* what we enter NOW */
4105 env->gpr[9] = (unsigned long)return_ip; /* what we enter LATER */
4106 env->gpr[3] = (unsigned long)sig; /* arg 1: signo */
4107 env->gpr[4] = (unsigned long)&frame->info; /* arg 2: (siginfo_t*) */
4108 env->gpr[5] = (unsigned long)&frame->uc; /* arg 3: ucontext */
4109
4110 /* actually move the usp to reflect the stacked frame */
4111 env->gpr[1] = (unsigned long)frame;
4112
4113 return;
4114
4115give_sigsegv:
4116 unlock_user_struct(frame, frame_addr, 1);
09391669 4117 force_sigsegv(sig);
d962783e
JL		 4118}
4119
4120long do_sigreturn(CPUOpenRISCState *env)
4121{
c8ee0a44
PB		 4122 trace_user_do_sigreturn(env, 0);
4123 fprintf(stderr, "do_sigreturn: not implemented\n");
d962783e
JL		 4124 return -TARGET_ENOSYS;
4125}
4126
4127long do_rt_sigreturn(CPUOpenRISCState *env)
4128{
c8ee0a44
PB		 4129 trace_user_do_rt_sigreturn(env, 0);
4130 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
d962783e
JL		 4131 return -TARGET_ENOSYS;
4132}
4133/* TARGET_OPENRISC */
4134
a4c075f1
UH		 4135#elif defined(TARGET_S390X)
4136
4137#define __NUM_GPRS 16
4138#define __NUM_FPRS 16
4139#define __NUM_ACRS 16
4140
4141#define S390_SYSCALL_SIZE 2
4142#define __SIGNAL_FRAMESIZE 160 /* FIXME: 31-bit mode -> 96 */
4143
4144#define _SIGCONTEXT_NSIG 64
4145#define _SIGCONTEXT_NSIG_BPW 64 /* FIXME: 31-bit mode -> 32 */
4146#define _SIGCONTEXT_NSIG_WORDS (_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW)
4147#define _SIGMASK_COPY_SIZE (sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS)
4148#define PSW_ADDR_AMODE 0x0000000000000000UL /* 0x80000000UL for 31-bit */
4149#define S390_SYSCALL_OPCODE ((uint16_t)0x0a00)
4150
4151typedef struct {
4152 target_psw_t psw;
4153 target_ulong gprs[__NUM_GPRS];
4154 unsigned int acrs[__NUM_ACRS];
4155} target_s390_regs_common;
4156
4157typedef struct {
4158 unsigned int fpc;
4159 double fprs[__NUM_FPRS];
4160} target_s390_fp_regs;
4161
4162typedef struct {
4163 target_s390_regs_common regs;
4164 target_s390_fp_regs fpregs;
4165} target_sigregs;
4166
4167struct target_sigcontext {
4168 target_ulong oldmask[_SIGCONTEXT_NSIG_WORDS];
4169 target_sigregs *sregs;
4170};
4171
4172typedef struct {
4173 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
4174 struct target_sigcontext sc;
4175 target_sigregs sregs;
4176 int signo;
4177 uint8_t retcode[S390_SYSCALL_SIZE];
4178} sigframe;
4179
4180struct target_ucontext {
6fea2ea4
PM		 4181 target_ulong tuc_flags;
4182 struct target_ucontext *tuc_link;
4183 target_stack_t tuc_stack;
4184 target_sigregs tuc_mcontext;
4185 target_sigset_t tuc_sigmask; /* mask last for extensibility */
a4c075f1
UH		 4186};
4187
4188typedef struct {
4189 uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
4190 uint8_t retcode[S390_SYSCALL_SIZE];
4191 struct target_siginfo info;
4192 struct target_ucontext uc;
4193} rt_sigframe;
4194
4195static inline abi_ulong
05390248 4196get_sigframe(struct target_sigaction *ka, CPUS390XState *env, size_t frame_size)
a4c075f1
UH		 4197{
4198 abi_ulong sp;
4199
4200 /* Default to using normal stack */
4201 sp = env->regs[15];
4202
4203 /* This is the X/Open sanctioned signal stack switching. */
4204 if (ka->sa_flags & TARGET_SA_ONSTACK) {
4205 if (!sas_ss_flags(sp)) {
4206 sp = target_sigaltstack_used.ss_sp +
4207 target_sigaltstack_used.ss_size;
4208 }
4209 }
4210
4211 /* This is the legacy signal stack switching. */
4212 else if (/* FIXME !user_mode(regs) */ 0 &&
4213 !(ka->sa_flags & TARGET_SA_RESTORER) &&
4214 ka->sa_restorer) {
4215 sp = (abi_ulong) ka->sa_restorer;
4216 }
4217
4218 return (sp - frame_size) & -8ul;
4219}
4220
05390248 4221static void save_sigregs(CPUS390XState *env, target_sigregs *sregs)
a4c075f1
UH		 4222{
4223 int i;
4224 //save_access_regs(current->thread.acrs); FIXME
4225
4226 /* Copy a 'clean' PSW mask to the user to avoid leaking
4227 information about whether PER is currently on. */
4228 __put_user(env->psw.mask, &sregs->regs.psw.mask);
4229 __put_user(env->psw.addr, &sregs->regs.psw.addr);
4230 for (i = 0; i < 16; i++) {
4231 __put_user(env->regs[i], &sregs->regs.gprs[i]);
4232 }
4233 for (i = 0; i < 16; i++) {
4234 __put_user(env->aregs[i], &sregs->regs.acrs[i]);
4235 }
4236 /*
4237 * We have to store the fp registers to current->thread.fp_regs
4238 * to merge them with the emulated registers.
4239 */
4240 //save_fp_regs(&current->thread.fp_regs); FIXME
4241 for (i = 0; i < 16; i++) {
c498d8e3 4242 __put_user(get_freg(env, i)->ll, &sregs->fpregs.fprs[i]);
a4c075f1
UH		 4243 }
4244}
4245
4246static void setup_frame(int sig, struct target_sigaction *ka,
05390248 4247 target_sigset_t *set, CPUS390XState *env)
a4c075f1
UH		 4248{
4249 sigframe *frame;
4250 abi_ulong frame_addr;
4251
4252 frame_addr = get_sigframe(ka, env, sizeof(*frame));
c8ee0a44 4253 trace_user_setup_frame(env, frame_addr);
a4c075f1 4254 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
da7c8647 4255 goto give_sigsegv;
a4c075f1
UH		 4256 }
4257
0188fadb 4258 __put_user(set->sig[0], &frame->sc.oldmask[0]);
a4c075f1
UH		 4259
4260 save_sigregs(env, &frame->sregs);
4261
4262 __put_user((abi_ulong)(unsigned long)&frame->sregs,
4263 (abi_ulong *)&frame->sc.sregs);
4264
4265 /* Set up to return from userspace. If provided, use a stub
4266 already in userspace. */
4267 if (ka->sa_flags & TARGET_SA_RESTORER) {
da7c8647
TB		 4268 env->regs[14] = (unsigned long)
4269 ka->sa_restorer | PSW_ADDR_AMODE;
a4c075f1 4270 } else {
5b1d59d0
CG		 4271 env->regs[14] = (frame_addr + offsetof(sigframe, retcode))
4272 | PSW_ADDR_AMODE;
da7c8647
TB		 4273 __put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn,
4274 (uint16_t *)(frame->retcode));
a4c075f1
UH		 4275 }
4276
4277 /* Set up backchain. */
0188fadb 4278 __put_user(env->regs[15], (abi_ulong *) frame);
a4c075f1
UH		 4279
4280 /* Set up registers for signal handler */
cb9c6268 4281 env->regs[15] = frame_addr;
a4c075f1
UH		 4282 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
4283
4284 env->regs[2] = sig; //map_signal(sig);
cb9c6268 4285 env->regs[3] = frame_addr += offsetof(typeof(*frame), sc);
a4c075f1
UH		 4286
4287 /* We forgot to include these in the sigcontext.
4288 To avoid breaking binary compatibility, they are passed as args. */
4289 env->regs[4] = 0; // FIXME: no clue... current->thread.trap_no;
4290 env->regs[5] = 0; // FIXME: no clue... current->thread.prot_addr;
4291
4292 /* Place signal number on stack to allow backtrace from handler. */
c1bc91c3 4293 __put_user(env->regs[2], &frame->signo);
a4c075f1
UH		 4294 unlock_user_struct(frame, frame_addr, 1);
4295 return;
4296
4297give_sigsegv:
09391669 4298 force_sigsegv(sig);
a4c075f1
UH		 4299}
4300
4301static void setup_rt_frame(int sig, struct target_sigaction *ka,
4302 target_siginfo_t *info,
05390248 4303 target_sigset_t *set, CPUS390XState *env)
a4c075f1
UH		 4304{
4305 int i;
4306 rt_sigframe *frame;
4307 abi_ulong frame_addr;
4308
4309 frame_addr = get_sigframe(ka, env, sizeof *frame);
c8ee0a44 4310 trace_user_setup_rt_frame(env, frame_addr);
a4c075f1
UH		 4311 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
4312 goto give_sigsegv;
4313 }
4314
f6c7a05b 4315 tswap_siginfo(&frame->info, info);
a4c075f1
UH		 4316
4317 /* Create the ucontext. */
6fea2ea4
PM		 4318 __put_user(0, &frame->uc.tuc_flags);
4319 __put_user((abi_ulong)0, (abi_ulong *)&frame->uc.tuc_link);
4320 __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
a4c075f1 4321 __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
da7c8647 4322 &frame->uc.tuc_stack.ss_flags);
6fea2ea4
PM		 4323 __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size);
4324 save_sigregs(env, &frame->uc.tuc_mcontext);
a4c075f1
UH		 4325 for (i = 0; i < TARGET_NSIG_WORDS; i++) {
4326 __put_user((abi_ulong)set->sig[i],
da7c8647 4327 (abi_ulong *)&frame->uc.tuc_sigmask.sig[i]);
a4c075f1
UH		 4328 }
4329
4330 /* Set up to return from userspace. If provided, use a stub
4331 already in userspace. */
4332 if (ka->sa_flags & TARGET_SA_RESTORER) {
4333 env->regs[14] = (unsigned long) ka->sa_restorer | PSW_ADDR_AMODE;
4334 } else {
4335 env->regs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE;
0188fadb
RV		 4336 __put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn,
4337 (uint16_t *)(frame->retcode));
a4c075f1
UH		 4338 }
4339
4340 /* Set up backchain. */
0188fadb 4341 __put_user(env->regs[15], (abi_ulong *) frame);
a4c075f1
UH		 4342
4343 /* Set up registers for signal handler */
cb9c6268 4344 env->regs[15] = frame_addr;
a4c075f1
UH		 4345 env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE;
4346
4347 env->regs[2] = sig; //map_signal(sig);
cb9c6268
EI		 4348 env->regs[3] = frame_addr + offsetof(typeof(*frame), info);
4349 env->regs[4] = frame_addr + offsetof(typeof(*frame), uc);
a4c075f1
UH		 4350 return;
4351
4352give_sigsegv:
09391669 4353 force_sigsegv(sig);
a4c075f1
UH		 4354}
4355
4356static int
05390248 4357restore_sigregs(CPUS390XState *env, target_sigregs *sc)
a4c075f1
UH		 4358{
4359 int err = 0;
4360 int i;
4361
4362 for (i = 0; i < 16; i++) {
1d8b512b 4363 __get_user(env->regs[i], &sc->regs.gprs[i]);
a4c075f1
UH		 4364 }
4365
1d8b512b 4366 __get_user(env->psw.mask, &sc->regs.psw.mask);
c8ee0a44
PB		 4367 trace_user_s390x_restore_sigregs(env, (unsigned long long)sc->regs.psw.addr,
4368 (unsigned long long)env->psw.addr);
1d8b512b 4369 __get_user(env->psw.addr, &sc->regs.psw.addr);
a4c075f1
UH		 4370 /* FIXME: 31-bit -> | PSW_ADDR_AMODE */
4371
4372 for (i = 0; i < 16; i++) {
1d8b512b 4373 __get_user(env->aregs[i], &sc->regs.acrs[i]);
a4c075f1
UH		 4374 }
4375 for (i = 0; i < 16; i++) {
c498d8e3 4376 __get_user(get_freg(env, i)->ll, &sc->fpregs.fprs[i]);
a4c075f1
UH		 4377 }
4378
4379 return err;
4380}
4381
05390248 4382long do_sigreturn(CPUS390XState *env)
a4c075f1
UH		 4383{
4384 sigframe *frame;
4385 abi_ulong frame_addr = env->regs[15];
a4c075f1
UH		 4386 target_sigset_t target_set;
4387 sigset_t set;
4388
c8ee0a44 4389 trace_user_do_sigreturn(env, frame_addr);
a4c075f1
UH		 4390 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
4391 goto badframe;
4392 }
f5f601af 4393 __get_user(target_set.sig[0], &frame->sc.oldmask[0]);
a4c075f1
UH		 4394
4395 target_to_host_sigset_internal(&set, &target_set);
9eede5b6 4396 set_sigmask(&set); /* ~_BLOCKABLE? */
a4c075f1
UH		 4397
4398 if (restore_sigregs(env, &frame->sregs)) {
4399 goto badframe;
4400 }
4401
4402 unlock_user_struct(frame, frame_addr, 0);
47405ab6 4403 return -TARGET_QEMU_ESIGRETURN;
a4c075f1
UH		 4404
4405badframe:
a4c075f1 4406 force_sig(TARGET_SIGSEGV);
c599d4d6 4407 return -TARGET_QEMU_ESIGRETURN;
a4c075f1
UH		 4408}
4409
05390248 4410long do_rt_sigreturn(CPUS390XState *env)
a4c075f1
UH		 4411{
4412 rt_sigframe *frame;
4413 abi_ulong frame_addr = env->regs[15];
a4c075f1
UH		 4414 sigset_t set;
4415
c8ee0a44 4416 trace_user_do_rt_sigreturn(env, frame_addr);
a4c075f1
UH		 4417 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
4418 goto badframe;
4419 }
6fea2ea4 4420 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
a4c075f1 4421
9eede5b6 4422 set_sigmask(&set); /* ~_BLOCKABLE? */
a4c075f1 4423
6fea2ea4 4424 if (restore_sigregs(env, &frame->uc.tuc_mcontext)) {
a4c075f1
UH		 4425 goto badframe;
4426 }
4427
6fea2ea4 4428 if (do_sigaltstack(frame_addr + offsetof(rt_sigframe, uc.tuc_stack), 0,
a4c075f1
UH		 4429 get_sp_from_cpustate(env)) == -EFAULT) {
4430 goto badframe;
4431 }
4432 unlock_user_struct(frame, frame_addr, 0);
47405ab6 4433 return -TARGET_QEMU_ESIGRETURN;
a4c075f1
UH		 4434
4435badframe:
4436 unlock_user_struct(frame, frame_addr, 0);
4437 force_sig(TARGET_SIGSEGV);
c599d4d6 4438 return -TARGET_QEMU_ESIGRETURN;
a4c075f1
UH		 4439}
4440
61e75fec 4441#elif defined(TARGET_PPC)
bcd4933a
NF		 4442
4443/* Size of dummy stack frame allocated when calling signal handler.
4444 See arch/powerpc/include/asm/ptrace.h. */
4445#if defined(TARGET_PPC64)
4446#define SIGNAL_FRAMESIZE 128
4447#else
4448#define SIGNAL_FRAMESIZE 64
4449#endif
4450
61e75fec
TM		 4451/* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC;
4452 on 64-bit PPC, sigcontext and mcontext are one and the same. */
4453struct target_mcontext {
4454 target_ulong mc_gregs[48];
4455 /* Includes fpscr. */
4456 uint64_t mc_fregs[33];
95cda4c4
BH		 4457#if defined(TARGET_PPC64)
4458 /* Pointer to the vector regs */
4459 target_ulong v_regs;
4460#else
61e75fec 4461 target_ulong mc_pad[2];
95cda4c4 4462#endif
61e75fec
TM		 4463 /* We need to handle Altivec and SPE at the same time, which no
4464 kernel needs to do. Fortunately, the kernel defines this bit to
4465 be Altivec-register-large all the time, rather than trying to
4466 twiddle it based on the specific platform. */
4467 union {
4468 /* SPE vector registers. One extra for SPEFSCR. */
4469 uint32_t spe[33];
4470 /* Altivec vector registers. The packing of VSCR and VRSAVE
4471 varies depending on whether we're PPC64 or not: PPC64 splits
95cda4c4
BH		 4472 them apart; PPC32 stuffs them together.
4473 We also need to account for the VSX registers on PPC64
4474 */
61e75fec 4475#if defined(TARGET_PPC64)
95cda4c4
BH		 4476#define QEMU_NVRREG (34 + 16)
4477 /* On ppc64, this mcontext structure is naturally *unaligned*,
4478 * or rather it is aligned on a 8 bytes boundary but not on
4479 * a 16 bytes one. This pad fixes it up. This is also why the
4480 * vector regs are referenced by the v_regs pointer above so
4481 * any amount of padding can be added here
4482 */
4483 target_ulong pad;
61e75fec 4484#else
95cda4c4 4485 /* On ppc32, we are already aligned to 16 bytes */
61e75fec
TM		 4486#define QEMU_NVRREG 33
4487#endif
95cda4c4
BH		 4488 /* We cannot use ppc_avr_t here as we do *not* want the implied
4489 * 16-bytes alignment that would result from it. This would have
4490 * the effect of making the whole struct target_mcontext aligned
4491 * which breaks the layout of struct target_ucontext on ppc64.
4492 */
4493 uint64_t altivec[QEMU_NVRREG][2];
61e75fec 4494#undef QEMU_NVRREG
95cda4c4 4495 } mc_vregs;
61e75fec
TM		 4496};
4497
bcd4933a
NF		 4498/* See arch/powerpc/include/asm/sigcontext.h. */
4499struct target_sigcontext {
4500 target_ulong _unused[4];
4501 int32_t signal;
4502#if defined(TARGET_PPC64)
4503 int32_t pad0;
4504#endif
4505 target_ulong handler;
4506 target_ulong oldmask;
4507 target_ulong regs; /* struct pt_regs __user * */
61e75fec
TM		 4508#if defined(TARGET_PPC64)
4509 struct target_mcontext mcontext;
4510#endif
bcd4933a
NF		 4511};
4512
4513/* Indices for target_mcontext.mc_gregs, below.
4514 See arch/powerpc/include/asm/ptrace.h for details. */
4515enum {
4516 TARGET_PT_R0 = 0,
4517 TARGET_PT_R1 = 1,
4518 TARGET_PT_R2 = 2,
4519 TARGET_PT_R3 = 3,
4520 TARGET_PT_R4 = 4,
4521 TARGET_PT_R5 = 5,
4522 TARGET_PT_R6 = 6,
4523 TARGET_PT_R7 = 7,
4524 TARGET_PT_R8 = 8,
4525 TARGET_PT_R9 = 9,
4526 TARGET_PT_R10 = 10,
4527 TARGET_PT_R11 = 11,
4528 TARGET_PT_R12 = 12,
4529 TARGET_PT_R13 = 13,
4530 TARGET_PT_R14 = 14,
4531 TARGET_PT_R15 = 15,
4532 TARGET_PT_R16 = 16,
4533 TARGET_PT_R17 = 17,
4534 TARGET_PT_R18 = 18,
4535 TARGET_PT_R19 = 19,
4536 TARGET_PT_R20 = 20,
4537 TARGET_PT_R21 = 21,
4538 TARGET_PT_R22 = 22,
4539 TARGET_PT_R23 = 23,
4540 TARGET_PT_R24 = 24,
4541 TARGET_PT_R25 = 25,
4542 TARGET_PT_R26 = 26,
4543 TARGET_PT_R27 = 27,
4544 TARGET_PT_R28 = 28,
4545 TARGET_PT_R29 = 29,
4546 TARGET_PT_R30 = 30,
4547 TARGET_PT_R31 = 31,
4548 TARGET_PT_NIP = 32,
4549 TARGET_PT_MSR = 33,
4550 TARGET_PT_ORIG_R3 = 34,
4551 TARGET_PT_CTR = 35,
4552 TARGET_PT_LNK = 36,
4553 TARGET_PT_XER = 37,
4554 TARGET_PT_CCR = 38,
4555 /* Yes, there are two registers with #39. One is 64-bit only. */
4556 TARGET_PT_MQ = 39,
4557 TARGET_PT_SOFTE = 39,
4558 TARGET_PT_TRAP = 40,
4559 TARGET_PT_DAR = 41,
4560 TARGET_PT_DSISR = 42,
4561 TARGET_PT_RESULT = 43,
4562 TARGET_PT_REGS_COUNT = 44
4563};
4564
bcd4933a
NF		 4565
4566struct target_ucontext {
60e99246
AJ		 4567 target_ulong tuc_flags;
4568 target_ulong tuc_link; /* struct ucontext __user * */
4569 struct target_sigaltstack tuc_stack;
bcd4933a 4570#if !defined(TARGET_PPC64)
60e99246
AJ		 4571 int32_t tuc_pad[7];
4572 target_ulong tuc_regs; /* struct mcontext __user *
bcd4933a
NF		 4573 points to uc_mcontext field */
4574#endif
60e99246 4575 target_sigset_t tuc_sigmask;
bcd4933a 4576#if defined(TARGET_PPC64)
c227f099 4577 target_sigset_t unused[15]; /* Allow for uc_sigmask growth */
61e75fec 4578 struct target_sigcontext tuc_sigcontext;
bcd4933a 4579#else
60e99246
AJ		 4580 int32_t tuc_maskext[30];
4581 int32_t tuc_pad2[3];
4582 struct target_mcontext tuc_mcontext;
bcd4933a
NF		 4583#endif
4584};
4585
4586/* See arch/powerpc/kernel/signal_32.c. */
4587struct target_sigframe {
4588 struct target_sigcontext sctx;
4589 struct target_mcontext mctx;
4590 int32_t abigap[56];
4591};
4592
61e75fec
TM		 4593#if defined(TARGET_PPC64)
4594
4595#define TARGET_TRAMP_SIZE 6
4596
4597struct target_rt_sigframe {
da7c8647
TB		 4598 /* sys_rt_sigreturn requires the ucontext be the first field */
4599 struct target_ucontext uc;
4600 target_ulong _unused[2];
4601 uint32_t trampoline[TARGET_TRAMP_SIZE];
4602 target_ulong pinfo; /* struct siginfo __user * */
4603 target_ulong puc; /* void __user * */
4604 struct target_siginfo info;
4605 /* 64 bit ABI allows for 288 bytes below sp before decrementing it. */
4606 char abigap[288];
61e75fec
TM		 4607} __attribute__((aligned(16)));
4608
4609#else
4610
bcd4933a
NF		 4611struct target_rt_sigframe {
4612 struct target_siginfo info;
4613 struct target_ucontext uc;
4614 int32_t abigap[56];
4615};
4616
61e75fec
TM		 4617#endif
4618
8d6ab333
TM		 4619#if defined(TARGET_PPC64)
4620
4621struct target_func_ptr {
4622 target_ulong entry;
4623 target_ulong toc;
4624};
4625
4626#endif
4627
bcd4933a
NF		 4628/* We use the mc_pad field for the signal return trampoline. */
4629#define tramp mc_pad
4630
4631/* See arch/powerpc/kernel/signal.c. */
4632static target_ulong get_sigframe(struct target_sigaction *ka,
05390248 4633 CPUPPCState *env,
bcd4933a
NF		 4634 int frame_size)
4635{
9be38598 4636 target_ulong oldsp;
bcd4933a
NF		 4637
4638 oldsp = env->gpr[1];
4639
4640 if ((ka->sa_flags & TARGET_SA_ONSTACK) &&
da7c8647 4641 (sas_ss_flags(oldsp) == 0)) {
bcd4933a
NF		 4642 oldsp = (target_sigaltstack_used.ss_sp
4643 + target_sigaltstack_used.ss_size);
4644 }
4645
9be38598 4646 return (oldsp - frame_size) & ~0xFUL;
bcd4933a
NF		 4647}
4648
95cda4c4
BH		 4649#if ((defined(TARGET_WORDS_BIGENDIAN) && defined(HOST_WORDS_BIGENDIAN)) || \
4650 (!defined(HOST_WORDS_BIGENDIAN) && !defined(TARGET_WORDS_BIGENDIAN)))
4651#define PPC_VEC_HI 0
4652#define PPC_VEC_LO 1
4653#else
4654#define PPC_VEC_HI 1
4655#define PPC_VEC_LO 0
4656#endif
4657
4658
7678108b 4659static void save_user_regs(CPUPPCState *env, struct target_mcontext *frame)
bcd4933a
NF		 4660{
4661 target_ulong msr = env->msr;
4662 int i;
4663 target_ulong ccr = 0;
4664
4665 /* In general, the kernel attempts to be intelligent about what it
4666 needs to save for Altivec/FP/SPE registers. We don't care that
4667 much, so we just go ahead and save everything. */
4668
4669 /* Save general registers. */
4670 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
da7c8647 4671 __put_user(env->gpr[i], &frame->mc_gregs[i]);
bcd4933a 4672 }
c650c008
RV		 4673 __put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]);
4674 __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]);
4675 __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]);
4676 __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]);
bcd4933a
NF		 4677
4678 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
4679 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
4680 }
c650c008 4681 __put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]);
bcd4933a
NF		 4682
4683 /* Save Altivec registers if necessary. */
4684 if (env->insns_flags & PPC_ALTIVEC) {
95cda4c4 4685 uint32_t *vrsave;
bcd4933a 4686 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
c227f099 4687 ppc_avr_t *avr = &env->avr[i];
95cda4c4 4688 ppc_avr_t *vreg = (ppc_avr_t *)&frame->mc_vregs.altivec[i];
bcd4933a 4689
95cda4c4
BH		 4690 __put_user(avr->u64[PPC_VEC_HI], &vreg->u64[0]);
4691 __put_user(avr->u64[PPC_VEC_LO], &vreg->u64[1]);
bcd4933a
NF		 4692 }
4693 /* Set MSR_VR in the saved MSR value to indicate that
4694 frame->mc_vregs contains valid data. */
4695 msr |= MSR_VR;
95cda4c4
BH		 4696#if defined(TARGET_PPC64)
4697 vrsave = (uint32_t *)&frame->mc_vregs.altivec[33];
4698 /* 64-bit needs to put a pointer to the vectors in the frame */
4699 __put_user(h2g(frame->mc_vregs.altivec), &frame->v_regs);
4700#else
4701 vrsave = (uint32_t *)&frame->mc_vregs.altivec[32];
4702#endif
4703 __put_user((uint32_t)env->spr[SPR_VRSAVE], vrsave);
4704 }
4705
4706 /* Save VSX second halves */
4707 if (env->insns_flags2 & PPC2_VSX) {
4708 uint64_t *vsregs = (uint64_t *)&frame->mc_vregs.altivec[34];
4709 for (i = 0; i < ARRAY_SIZE(env->vsr); i++) {
4710 __put_user(env->vsr[i], &vsregs[i]);
4711 }
bcd4933a
NF		 4712 }
4713
4714 /* Save floating point registers. */
4715 if (env->insns_flags & PPC_FLOAT) {
4716 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
c650c008 4717 __put_user(env->fpr[i], &frame->mc_fregs[i]);
bcd4933a 4718 }
c650c008 4719 __put_user((uint64_t) env->fpscr, &frame->mc_fregs[32]);
bcd4933a
NF		 4720 }
4721
4722 /* Save SPE registers. The kernel only saves the high half. */
4723 if (env->insns_flags & PPC_SPE) {
4724#if defined(TARGET_PPC64)
4725 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
c650c008 4726 __put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i]);
bcd4933a
NF		 4727 }
4728#else
4729 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
c650c008 4730 __put_user(env->gprh[i], &frame->mc_vregs.spe[i]);
bcd4933a
NF		 4731 }
4732#endif
4733 /* Set MSR_SPE in the saved MSR value to indicate that
4734 frame->mc_vregs contains valid data. */
4735 msr |= MSR_SPE;
c650c008 4736 __put_user(env->spe_fscr, &frame->mc_vregs.spe[32]);
bcd4933a
NF		 4737 }
4738
4739 /* Store MSR. */
c650c008 4740 __put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]);
7678108b 4741}
bcd4933a 4742
7678108b
TM		 4743static void encode_trampoline(int sigret, uint32_t *tramp)
4744{
bcd4933a
NF		 4745 /* Set up the sigreturn trampoline: li r0,sigret; sc. */
4746 if (sigret) {
7678108b
TM		 4747 __put_user(0x38000000 | sigret, &tramp[0]);
4748 __put_user(0x44000002, &tramp[1]);
bcd4933a 4749 }
bcd4933a
NF		 4750}
4751
c650c008
RV		 4752static void restore_user_regs(CPUPPCState *env,
4753 struct target_mcontext *frame, int sig)
bcd4933a
NF		 4754{
4755 target_ulong save_r2 = 0;
4756 target_ulong msr;
4757 target_ulong ccr;
4758
4759 int i;
4760
4761 if (!sig) {
4762 save_r2 = env->gpr[2];
4763 }
4764
4765 /* Restore general registers. */
4766 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
c650c008 4767 __get_user(env->gpr[i], &frame->mc_gregs[i]);
bcd4933a 4768 }
c650c008
RV		 4769 __get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]);
4770 __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]);
4771 __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]);
4772 __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]);
4773 __get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]);
bcd4933a
NF		 4774
4775 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
4776 env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf;
4777 }
4778
4779 if (!sig) {
4780 env->gpr[2] = save_r2;
4781 }
4782 /* Restore MSR. */
c650c008 4783 __get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]);
bcd4933a
NF		 4784
4785 /* If doing signal return, restore the previous little-endian mode. */
4786 if (sig)
49e55cba 4787 env->msr = (env->msr & ~(1ull << MSR_LE)) | (msr & (1ull << MSR_LE));
bcd4933a
NF		 4788
4789 /* Restore Altivec registers if necessary. */
4790 if (env->insns_flags & PPC_ALTIVEC) {
95cda4c4
BH		 4791 ppc_avr_t *v_regs;
4792 uint32_t *vrsave;
4793#if defined(TARGET_PPC64)
4794 uint64_t v_addr;
4795 /* 64-bit needs to recover the pointer to the vectors from the frame */
4796 __get_user(v_addr, &frame->v_regs);
4797 v_regs = g2h(v_addr);
4798#else
4799 v_regs = (ppc_avr_t *)frame->mc_vregs.altivec;
4800#endif
bcd4933a 4801 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
c227f099 4802 ppc_avr_t *avr = &env->avr[i];
95cda4c4 4803 ppc_avr_t *vreg = &v_regs[i];
bcd4933a 4804
95cda4c4
BH		 4805 __get_user(avr->u64[PPC_VEC_HI], &vreg->u64[0]);
4806 __get_user(avr->u64[PPC_VEC_LO], &vreg->u64[1]);
bcd4933a
NF		 4807 }
4808 /* Set MSR_VEC in the saved MSR value to indicate that
4809 frame->mc_vregs contains valid data. */
95cda4c4
BH		 4810#if defined(TARGET_PPC64)
4811 vrsave = (uint32_t *)&v_regs[33];
4812#else
4813 vrsave = (uint32_t *)&v_regs[32];
4814#endif
4815 __get_user(env->spr[SPR_VRSAVE], vrsave);
4816 }
4817
4818 /* Restore VSX second halves */
4819 if (env->insns_flags2 & PPC2_VSX) {
4820 uint64_t *vsregs = (uint64_t *)&frame->mc_vregs.altivec[34];
4821 for (i = 0; i < ARRAY_SIZE(env->vsr); i++) {
4822 __get_user(env->vsr[i], &vsregs[i]);
4823 }
bcd4933a
NF		 4824 }
4825
4826 /* Restore floating point registers. */
4827 if (env->insns_flags & PPC_FLOAT) {
4828 uint64_t fpscr;
4829 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
c650c008 4830 __get_user(env->fpr[i], &frame->mc_fregs[i]);
bcd4933a 4831 }
c650c008 4832 __get_user(fpscr, &frame->mc_fregs[32]);
bcd4933a
NF		 4833 env->fpscr = (uint32_t) fpscr;
4834 }
4835
4836 /* Save SPE registers. The kernel only saves the high half. */
4837 if (env->insns_flags & PPC_SPE) {
4838#if defined(TARGET_PPC64)
4839 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
4840 uint32_t hi;
4841
c650c008 4842 __get_user(hi, &frame->mc_vregs.spe[i]);
bcd4933a
NF		 4843 env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
4844 }
4845#else
4846 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
c650c008 4847 __get_user(env->gprh[i], &frame->mc_vregs.spe[i]);
bcd4933a
NF		 4848 }
4849#endif
c650c008 4850 __get_user(env->spe_fscr, &frame->mc_vregs.spe[32]);
bcd4933a 4851 }
bcd4933a
NF		 4852}
4853
95cda4c4 4854#if !defined(TARGET_PPC64)
bcd4933a 4855static void setup_frame(int sig, struct target_sigaction *ka,
05390248 4856 target_sigset_t *set, CPUPPCState *env)
bcd4933a
NF		 4857{
4858 struct target_sigframe *frame;
4859 struct target_sigcontext *sc;
4860 target_ulong frame_addr, newsp;
4861 int err = 0;
bcd4933a
NF		 4862
4863 frame_addr = get_sigframe(ka, env, sizeof(*frame));
c8ee0a44 4864 trace_user_setup_frame(env, frame_addr);
bcd4933a
NF		 4865 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
4866 goto sigsegv;
4867 sc = &frame->sctx;
4868
1d8b512b
RV		 4869 __put_user(ka->_sa_handler, &sc->handler);
4870 __put_user(set->sig[0], &sc->oldmask);
1d8b512b 4871 __put_user(set->sig[1], &sc->_unused[3]);
1d8b512b
RV		 4872 __put_user(h2g(&frame->mctx), &sc->regs);
4873 __put_user(sig, &sc->signal);
bcd4933a
NF		 4874
4875 /* Save user regs. */
7678108b
TM		 4876 save_user_regs(env, &frame->mctx);
4877
4878 /* Construct the trampoline code on the stack. */
4879 encode_trampoline(TARGET_NR_sigreturn, (uint32_t *)&frame->mctx.tramp);
bcd4933a
NF		 4880
4881 /* The kernel checks for the presence of a VDSO here. We don't
4882 emulate a vdso, so use a sigreturn system call. */
4883 env->lr = (target_ulong) h2g(frame->mctx.tramp);
4884
4885 /* Turn off all fp exceptions. */
4886 env->fpscr = 0;
4887
4888 /* Create a stack frame for the caller of the handler. */
4889 newsp = frame_addr - SIGNAL_FRAMESIZE;
beb526b1 4890 err |= put_user(env->gpr[1], newsp, target_ulong);
bcd4933a
NF		 4891
4892 if (err)
4893 goto sigsegv;
4894
4895 /* Set up registers for signal handler. */
4896 env->gpr[1] = newsp;
b6e2c935 4897 env->gpr[3] = sig;
61993a67 4898 env->gpr[4] = frame_addr + offsetof(struct target_sigframe, sctx);
8d6ab333 4899
bcd4933a 4900 env->nip = (target_ulong) ka->_sa_handler;
8d6ab333 4901
bcd4933a 4902 /* Signal handlers are entered in big-endian mode. */
49e55cba 4903 env->msr &= ~(1ull << MSR_LE);
bcd4933a
NF		 4904
4905 unlock_user_struct(frame, frame_addr, 1);
4906 return;
4907
4908sigsegv:
4909 unlock_user_struct(frame, frame_addr, 1);
09391669 4910 force_sigsegv(sig);
bcd4933a 4911}
95cda4c4 4912#endif /* !defined(TARGET_PPC64) */
bcd4933a
NF		 4913
4914static void setup_rt_frame(int sig, struct target_sigaction *ka,
c227f099 4915 target_siginfo_t *info,
05390248 4916 target_sigset_t *set, CPUPPCState *env)
bcd4933a
NF		 4917{
4918 struct target_rt_sigframe *rt_sf;
61e75fec
TM		 4919 uint32_t *trampptr = 0;
4920 struct target_mcontext *mctx = 0;
bcd4933a
NF		 4921 target_ulong rt_sf_addr, newsp = 0;
4922 int i, err = 0;
14585580
TM		 4923#if defined(TARGET_PPC64)
4924 struct image_info *image = ((TaskState *)thread_cpu->opaque)->info;
4925#endif
bcd4933a
NF		 4926
4927 rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
4928 if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1))
4929 goto sigsegv;
4930
f6c7a05b 4931 tswap_siginfo(&rt_sf->info, info);
bcd4933a 4932
1d8b512b
RV		 4933 __put_user(0, &rt_sf->uc.tuc_flags);
4934 __put_user(0, &rt_sf->uc.tuc_link);
4935 __put_user((target_ulong)target_sigaltstack_used.ss_sp,
4936 &rt_sf->uc.tuc_stack.ss_sp);
4937 __put_user(sas_ss_flags(env->gpr[1]),
4938 &rt_sf->uc.tuc_stack.ss_flags);
4939 __put_user(target_sigaltstack_used.ss_size,
4940 &rt_sf->uc.tuc_stack.ss_size);
61e75fec 4941#if !defined(TARGET_PPC64)
1d8b512b
RV		 4942 __put_user(h2g (&rt_sf->uc.tuc_mcontext),
4943 &rt_sf->uc.tuc_regs);
61e75fec 4944#endif
bcd4933a 4945 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1d8b512b 4946 __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]);
bcd4933a
NF		 4947 }
4948
61e75fec
TM		 4949#if defined(TARGET_PPC64)
4950 mctx = &rt_sf->uc.tuc_sigcontext.mcontext;
4951 trampptr = &rt_sf->trampoline[0];
4952#else
4953 mctx = &rt_sf->uc.tuc_mcontext;
4954 trampptr = (uint32_t *)&rt_sf->uc.tuc_mcontext.tramp;
4955#endif
4956
4957 save_user_regs(env, mctx);
4958 encode_trampoline(TARGET_NR_rt_sigreturn, trampptr);
bcd4933a
NF		 4959
4960 /* The kernel checks for the presence of a VDSO here. We don't
4961 emulate a vdso, so use a sigreturn system call. */
61e75fec 4962 env->lr = (target_ulong) h2g(trampptr);
bcd4933a
NF		 4963
4964 /* Turn off all fp exceptions. */
4965 env->fpscr = 0;
4966
4967 /* Create a stack frame for the caller of the handler. */
4968 newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
fbdc200a 4969 err |= put_user(env->gpr[1], newsp, target_ulong);
bcd4933a
NF		 4970
4971 if (err)
4972 goto sigsegv;
4973
4974 /* Set up registers for signal handler. */
4975 env->gpr[1] = newsp;
b6e2c935 4976 env->gpr[3] = (target_ulong) sig;
bcd4933a
NF		 4977 env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
4978 env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
4979 env->gpr[6] = (target_ulong) h2g(rt_sf);
8d6ab333
TM		 4980
4981#if defined(TARGET_PPC64)
14585580
TM		 4982 if (get_ppc64_abi(image) < 2) {
4983 /* ELFv1 PPC64 function pointers are pointers to OPD entries. */
4984 struct target_func_ptr *handler =
4985 (struct target_func_ptr *)g2h(ka->_sa_handler);
4986 env->nip = tswapl(handler->entry);
4987 env->gpr[2] = tswapl(handler->toc);
4988 } else {
4989 /* ELFv2 PPC64 function pointers are entry points, but R12
4990 * must also be set */
4991 env->nip = tswapl((target_ulong) ka->_sa_handler);
4992 env->gpr[12] = env->nip;
4993 }
8d6ab333 4994#else
bcd4933a 4995 env->nip = (target_ulong) ka->_sa_handler;
8d6ab333
TM		 4996#endif
4997
bcd4933a 4998 /* Signal handlers are entered in big-endian mode. */
49e55cba 4999 env->msr &= ~(1ull << MSR_LE);
bcd4933a
NF		 5000
5001 unlock_user_struct(rt_sf, rt_sf_addr, 1);
5002 return;
5003
5004sigsegv:
5005 unlock_user_struct(rt_sf, rt_sf_addr, 1);
09391669 5006 force_sigsegv(sig);
bcd4933a
NF		 5007
5008}
5009
95cda4c4 5010#if !defined(TARGET_PPC64)
05390248 5011long do_sigreturn(CPUPPCState *env)
bcd4933a
NF		 5012{
5013 struct target_sigcontext *sc = NULL;
5014 struct target_mcontext *sr = NULL;
b04636f8 5015 target_ulong sr_addr = 0, sc_addr;
bcd4933a 5016 sigset_t blocked;
c227f099 5017 target_sigset_t set;
bcd4933a
NF		 5018
5019 sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
5020 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1))
5021 goto sigsegv;
5022
5023#if defined(TARGET_PPC64)
61e75fec 5024 set.sig[0] = sc->oldmask + ((uint64_t)(sc->_unused[3]) << 32);
bcd4933a 5025#else
f5f601af
RV		 5026 __get_user(set.sig[0], &sc->oldmask);
5027 __get_user(set.sig[1], &sc->_unused[3]);
bcd4933a
NF		 5028#endif
5029 target_to_host_sigset_internal(&blocked, &set);
9eede5b6 5030 set_sigmask(&blocked);
bcd4933a 5031
f5f601af 5032 __get_user(sr_addr, &sc->regs);
bcd4933a
NF		 5033 if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1))
5034 goto sigsegv;
c650c008 5035 restore_user_regs(env, sr, 1);
bcd4933a
NF		 5036
5037 unlock_user_struct(sr, sr_addr, 1);
5038 unlock_user_struct(sc, sc_addr, 1);
5039 return -TARGET_QEMU_ESIGRETURN;
5040
5041sigsegv:
5042 unlock_user_struct(sr, sr_addr, 1);
5043 unlock_user_struct(sc, sc_addr, 1);
66393fb9 5044 force_sig(TARGET_SIGSEGV);
c599d4d6 5045 return -TARGET_QEMU_ESIGRETURN;
bcd4933a 5046}
95cda4c4 5047#endif /* !defined(TARGET_PPC64) */
bcd4933a
NF		 5048
5049/* See arch/powerpc/kernel/signal_32.c. */
05390248 5050static int do_setcontext(struct target_ucontext *ucp, CPUPPCState *env, int sig)
bcd4933a
NF		 5051{
5052 struct target_mcontext *mcp;
5053 target_ulong mcp_addr;
5054 sigset_t blocked;
c227f099 5055 target_sigset_t set;
bcd4933a 5056
60e99246 5057 if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask),
bcd4933a
NF		 5058 sizeof (set)))
5059 return 1;
5060
19774ec5
TM		 5061#if defined(TARGET_PPC64)
5062 mcp_addr = h2g(ucp) +
5063 offsetof(struct target_ucontext, tuc_sigcontext.mcontext);
5064#else
9e918dc9 5065 __get_user(mcp_addr, &ucp->tuc_regs);
19774ec5 5066#endif
bcd4933a
NF		 5067
5068 if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1))
5069 return 1;
5070
5071 target_to_host_sigset_internal(&blocked, &set);
9eede5b6 5072 set_sigmask(&blocked);
c650c008 5073 restore_user_regs(env, mcp, sig);
bcd4933a
NF		 5074
5075 unlock_user_struct(mcp, mcp_addr, 1);
5076 return 0;
bcd4933a
NF		 5077}
5078
05390248 5079long do_rt_sigreturn(CPUPPCState *env)
bcd4933a
NF		 5080{
5081 struct target_rt_sigframe *rt_sf = NULL;
5082 target_ulong rt_sf_addr;
5083
5084 rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16;
5085 if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1))
5086 goto sigsegv;
5087
5088 if (do_setcontext(&rt_sf->uc, env, 1))
5089 goto sigsegv;
5090
5091 do_sigaltstack(rt_sf_addr
60e99246 5092 + offsetof(struct target_rt_sigframe, uc.tuc_stack),
bcd4933a
NF		 5093 0, env->gpr[1]);
5094
5095 unlock_user_struct(rt_sf, rt_sf_addr, 1);
5096 return -TARGET_QEMU_ESIGRETURN;
5097
5098sigsegv:
5099 unlock_user_struct(rt_sf, rt_sf_addr, 1);
66393fb9 5100 force_sig(TARGET_SIGSEGV);
c599d4d6 5101 return -TARGET_QEMU_ESIGRETURN;
bcd4933a
NF		 5102}
5103
492a8744
LV		 5104#elif defined(TARGET_M68K)
5105
5106struct target_sigcontext {
5107 abi_ulong sc_mask;
5108 abi_ulong sc_usp;
5109 abi_ulong sc_d0;
5110 abi_ulong sc_d1;
5111 abi_ulong sc_a0;
5112 abi_ulong sc_a1;
5113 unsigned short sc_sr;
5114 abi_ulong sc_pc;
5115};
5116
5117struct target_sigframe
5118{
5119 abi_ulong pretcode;
5120 int sig;
5121 int code;
5122 abi_ulong psc;
5123 char retcode[8];
5124 abi_ulong extramask[TARGET_NSIG_WORDS-1];
5125 struct target_sigcontext sc;
5126};
da7c8647 5127
c227f099 5128typedef int target_greg_t;
7181155d 5129#define TARGET_NGREG 18
c227f099 5130typedef target_greg_t target_gregset_t[TARGET_NGREG];
7181155d
LV		 5131
5132typedef struct target_fpregset {
5133 int f_fpcntl[3];
5134 int f_fpregs[8*3];
c227f099 5135} target_fpregset_t;
7181155d
LV		 5136
5137struct target_mcontext {
5138 int version;
c227f099
AL		 5139 target_gregset_t gregs;
5140 target_fpregset_t fpregs;
7181155d
LV		 5141};
5142
5143#define TARGET_MCONTEXT_VERSION 2
5144
5145struct target_ucontext {
60e99246
AJ		 5146 abi_ulong tuc_flags;
5147 abi_ulong tuc_link;
5148 target_stack_t tuc_stack;
5149 struct target_mcontext tuc_mcontext;
5150 abi_long tuc_filler[80];
5151 target_sigset_t tuc_sigmask;
7181155d
LV		 5152};
5153
5154struct target_rt_sigframe
5155{
5156 abi_ulong pretcode;
5157 int sig;
5158 abi_ulong pinfo;
5159 abi_ulong puc;
5160 char retcode[8];
5161 struct target_siginfo info;
5162 struct target_ucontext uc;
5163};
492a8744 5164
41ecc72b 5165static void setup_sigcontext(struct target_sigcontext *sc, CPUM68KState *env,
da7c8647 5166 abi_ulong mask)
492a8744 5167{
1d8b512b
RV		 5168 __put_user(mask, &sc->sc_mask);
5169 __put_user(env->aregs[7], &sc->sc_usp);
5170 __put_user(env->dregs[0], &sc->sc_d0);
5171 __put_user(env->dregs[1], &sc->sc_d1);
5172 __put_user(env->aregs[0], &sc->sc_a0);
5173 __put_user(env->aregs[1], &sc->sc_a1);
5174 __put_user(env->sr, &sc->sc_sr);
5175 __put_user(env->pc, &sc->sc_pc);
492a8744
LV		 5176}
5177
016d2e1d 5178static void
7ccb84a9 5179restore_sigcontext(CPUM68KState *env, struct target_sigcontext *sc)
492a8744 5180{
492a8744
LV		 5181 int temp;
5182
1d8b512b 5183 __get_user(env->aregs[7], &sc->sc_usp);
7ccb84a9 5184 __get_user(env->dregs[0], &sc->sc_d0);
1d8b512b
RV		 5185 __get_user(env->dregs[1], &sc->sc_d1);
5186 __get_user(env->aregs[0], &sc->sc_a0);
5187 __get_user(env->aregs[1], &sc->sc_a1);
5188 __get_user(env->pc, &sc->sc_pc);
5189 __get_user(temp, &sc->sc_sr);
492a8744 5190 env->sr = (env->sr & 0xff00) | (temp & 0xff);
492a8744
LV		 5191}
5192
5193/*
5194 * Determine which stack to use..
5195 */
5196static inline abi_ulong
05390248
AF		 5197get_sigframe(struct target_sigaction *ka, CPUM68KState *regs,
5198 size_t frame_size)
492a8744
LV		 5199{
5200 unsigned long sp;
5201
5202 sp = regs->aregs[7];
5203
5204 /* This is the X/Open sanctioned signal stack switching. */
5205 if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
5206 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
5207 }
5208
5209 return ((sp - frame_size) & -8UL);
5210}
5211
5212static void setup_frame(int sig, struct target_sigaction *ka,
05390248 5213 target_sigset_t *set, CPUM68KState *env)
492a8744
LV		 5214{
5215 struct target_sigframe *frame;
5216 abi_ulong frame_addr;
5217 abi_ulong retcode_addr;
5218 abi_ulong sc_addr;
492a8744
LV		 5219 int i;
5220
5221 frame_addr = get_sigframe(ka, env, sizeof *frame);
c8ee0a44 5222 trace_user_setup_frame(env, frame_addr);
da7c8647
TB		 5223 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5224 goto give_sigsegv;
5225 }
492a8744 5226
1d8b512b 5227 __put_user(sig, &frame->sig);
492a8744
LV		 5228
5229 sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
1d8b512b 5230 __put_user(sc_addr, &frame->psc);
492a8744 5231
41ecc72b 5232 setup_sigcontext(&frame->sc, env, set->sig[0]);
492a8744
LV		 5233
5234 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
0188fadb 5235 __put_user(set->sig[i], &frame->extramask[i - 1]);
492a8744
LV		 5236 }
5237
5238 /* Set up to return from userspace. */
5239
5240 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
1d8b512b 5241 __put_user(retcode_addr, &frame->pretcode);
492a8744
LV		 5242
5243 /* moveq #,d0; trap #0 */
5244
1d8b512b 5245 __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16),
da7c8647 5246 (uint32_t *)(frame->retcode));
492a8744 5247
492a8744
LV		 5248 /* Set up to return from userspace */
5249
5250 env->aregs[7] = frame_addr;
5251 env->pc = ka->_sa_handler;
5252
5253 unlock_user_struct(frame, frame_addr, 1);
5254 return;
5255
5256give_sigsegv:
09391669 5257 force_sigsegv(sig);
492a8744
LV		 5258}
5259
7181155d 5260static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
05390248 5261 CPUM68KState *env)
7181155d 5262{
60e99246 5263 target_greg_t *gregs = uc->tuc_mcontext.gregs;
7181155d 5264
1d8b512b
RV		 5265 __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version);
5266 __put_user(env->dregs[0], &gregs[0]);
5267 __put_user(env->dregs[1], &gregs[1]);
5268 __put_user(env->dregs[2], &gregs[2]);
5269 __put_user(env->dregs[3], &gregs[3]);
5270 __put_user(env->dregs[4], &gregs[4]);
5271 __put_user(env->dregs[5], &gregs[5]);
5272 __put_user(env->dregs[6], &gregs[6]);
5273 __put_user(env->dregs[7], &gregs[7]);
5274 __put_user(env->aregs[0], &gregs[8]);
5275 __put_user(env->aregs[1], &gregs[9]);
5276 __put_user(env->aregs[2], &gregs[10]);
5277 __put_user(env->aregs[3], &gregs[11]);
5278 __put_user(env->aregs[4], &gregs[12]);
5279 __put_user(env->aregs[5], &gregs[13]);
5280 __put_user(env->aregs[6], &gregs[14]);
5281 __put_user(env->aregs[7], &gregs[15]);
5282 __put_user(env->pc, &gregs[16]);
5283 __put_user(env->sr, &gregs[17]);
7181155d 5284
1d8b512b 5285 return 0;
7181155d 5286}
da7c8647 5287
05390248 5288static inline int target_rt_restore_ucontext(CPUM68KState *env,
7ccb84a9 5289 struct target_ucontext *uc)
7181155d
LV		 5290{
5291 int temp;
60e99246 5292 target_greg_t *gregs = uc->tuc_mcontext.gregs;
7181155d 5293
1d8b512b 5294 __get_user(temp, &uc->tuc_mcontext.version);
7181155d
LV		 5295 if (temp != TARGET_MCONTEXT_VERSION)
5296 goto badframe;
5297
5298 /* restore passed registers */
1d8b512b
RV		 5299 __get_user(env->dregs[0], &gregs[0]);
5300 __get_user(env->dregs[1], &gregs[1]);
5301 __get_user(env->dregs[2], &gregs[2]);
5302 __get_user(env->dregs[3], &gregs[3]);
5303 __get_user(env->dregs[4], &gregs[4]);
5304 __get_user(env->dregs[5], &gregs[5]);
5305 __get_user(env->dregs[6], &gregs[6]);
5306 __get_user(env->dregs[7], &gregs[7]);
5307 __get_user(env->aregs[0], &gregs[8]);
5308 __get_user(env->aregs[1], &gregs[9]);
5309 __get_user(env->aregs[2], &gregs[10]);
5310 __get_user(env->aregs[3], &gregs[11]);
5311 __get_user(env->aregs[4], &gregs[12]);
5312 __get_user(env->aregs[5], &gregs[13]);
5313 __get_user(env->aregs[6], &gregs[14]);
5314 __get_user(env->aregs[7], &gregs[15]);
5315 __get_user(env->pc, &gregs[16]);
5316 __get_user(temp, &gregs[17]);
7181155d
LV		 5317 env->sr = (env->sr & 0xff00) | (temp & 0xff);
5318
1d8b512b 5319 return 0;
7181155d
LV		 5320
5321badframe:
5322 return 1;
5323}
5324
492a8744 5325static void setup_rt_frame(int sig, struct target_sigaction *ka,
c227f099 5326 target_siginfo_t *info,
05390248 5327 target_sigset_t *set, CPUM68KState *env)
492a8744 5328{
7181155d
LV		 5329 struct target_rt_sigframe *frame;
5330 abi_ulong frame_addr;
5331 abi_ulong retcode_addr;
5332 abi_ulong info_addr;
5333 abi_ulong uc_addr;
5334 int err = 0;
5335 int i;
5336
5337 frame_addr = get_sigframe(ka, env, sizeof *frame);
c8ee0a44 5338 trace_user_setup_rt_frame(env, frame_addr);
da7c8647
TB		 5339 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5340 goto give_sigsegv;
5341 }
7181155d 5342
1d8b512b 5343 __put_user(sig, &frame->sig);
7181155d
LV		 5344
5345 info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
1d8b512b 5346 __put_user(info_addr, &frame->pinfo);
7181155d
LV		 5347
5348 uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
1d8b512b 5349 __put_user(uc_addr, &frame->puc);
7181155d 5350
f6c7a05b 5351 tswap_siginfo(&frame->info, info);
7181155d
LV		 5352
5353 /* Create the ucontext */
5354
1d8b512b
RV		 5355 __put_user(0, &frame->uc.tuc_flags);
5356 __put_user(0, &frame->uc.tuc_link);
5357 __put_user(target_sigaltstack_used.ss_sp,
5358 &frame->uc.tuc_stack.ss_sp);
5359 __put_user(sas_ss_flags(env->aregs[7]),
da7c8647 5360 &frame->uc.tuc_stack.ss_flags);
1d8b512b
RV		 5361 __put_user(target_sigaltstack_used.ss_size,
5362 &frame->uc.tuc_stack.ss_size);
7181155d
LV		 5363 err |= target_rt_setup_ucontext(&frame->uc, env);
5364
5365 if (err)
da7c8647 5366 goto give_sigsegv;
7181155d
LV		 5367
5368 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
0188fadb 5369 __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
7181155d
LV		 5370 }
5371
5372 /* Set up to return from userspace. */
5373
5374 retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
1d8b512b 5375 __put_user(retcode_addr, &frame->pretcode);
7181155d
LV		 5376
5377 /* moveq #,d0; notb d0; trap #0 */
5378
1d8b512b 5379 __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16),
1669add7
PM		 5380 (uint32_t *)(frame->retcode + 0));
5381 __put_user(0x4e40, (uint16_t *)(frame->retcode + 4));
7181155d
LV		 5382
5383 if (err)
5384 goto give_sigsegv;
5385
5386 /* Set up to return from userspace */
5387
5388 env->aregs[7] = frame_addr;
5389 env->pc = ka->_sa_handler;
5390
5391 unlock_user_struct(frame, frame_addr, 1);
5392 return;
5393
5394give_sigsegv:
5395 unlock_user_struct(frame, frame_addr, 1);
09391669 5396 force_sigsegv(sig);
492a8744
LV		 5397}
5398
05390248 5399long do_sigreturn(CPUM68KState *env)
492a8744
LV		 5400{
5401 struct target_sigframe *frame;
5402 abi_ulong frame_addr = env->aregs[7] - 4;
c227f099 5403 target_sigset_t target_set;
492a8744 5404 sigset_t set;
7ccb84a9 5405 int i;
492a8744 5406
c8ee0a44 5407 trace_user_do_sigreturn(env, frame_addr);
492a8744
LV		 5408 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
5409 goto badframe;
5410
5411 /* set blocked signals */
5412
f5f601af 5413 __get_user(target_set.sig[0], &frame->sc.sc_mask);
492a8744
LV		 5414
5415 for(i = 1; i < TARGET_NSIG_WORDS; i++) {
f5f601af 5416 __get_user(target_set.sig[i], &frame->extramask[i - 1]);
492a8744
LV		 5417 }
5418
5419 target_to_host_sigset_internal(&set, &target_set);
9eede5b6 5420 set_sigmask(&set);
492a8744
LV		 5421
5422 /* restore registers */
5423
7ccb84a9 5424 restore_sigcontext(env, &frame->sc);
492a8744
LV		 5425
5426 unlock_user_struct(frame, frame_addr, 0);
7ccb84a9 5427 return -TARGET_QEMU_ESIGRETURN;
492a8744
LV		 5428
5429badframe:
492a8744 5430 force_sig(TARGET_SIGSEGV);
c599d4d6 5431 return -TARGET_QEMU_ESIGRETURN;
492a8744
LV		 5432}
5433
05390248 5434long do_rt_sigreturn(CPUM68KState *env)
492a8744 5435{
7181155d
LV		 5436 struct target_rt_sigframe *frame;
5437 abi_ulong frame_addr = env->aregs[7] - 4;
c227f099 5438 target_sigset_t target_set;
7181155d 5439 sigset_t set;
7181155d 5440
c8ee0a44 5441 trace_user_do_rt_sigreturn(env, frame_addr);
7181155d
LV		 5442 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
5443 goto badframe;
5444
5445 target_to_host_sigset_internal(&set, &target_set);
9eede5b6 5446 set_sigmask(&set);
7181155d
LV		 5447
5448 /* restore registers */
5449
7ccb84a9 5450 if (target_rt_restore_ucontext(env, &frame->uc))
7181155d
LV		 5451 goto badframe;
5452
5453 if (do_sigaltstack(frame_addr +
60e99246 5454 offsetof(struct target_rt_sigframe, uc.tuc_stack),
7181155d
LV		 5455 0, get_sp_from_cpustate(env)) == -EFAULT)
5456 goto badframe;
5457
5458 unlock_user_struct(frame, frame_addr, 0);
7ccb84a9 5459 return -TARGET_QEMU_ESIGRETURN;
7181155d
LV		 5460
5461badframe:
5462 unlock_user_struct(frame, frame_addr, 0);
5463 force_sig(TARGET_SIGSEGV);
c599d4d6 5464 return -TARGET_QEMU_ESIGRETURN;
492a8744
LV		 5465}
5466
6049f4f8
RH		 5467#elif defined(TARGET_ALPHA)
5468
5469struct target_sigcontext {
5470 abi_long sc_onstack;
5471 abi_long sc_mask;
5472 abi_long sc_pc;
5473 abi_long sc_ps;
5474 abi_long sc_regs[32];
5475 abi_long sc_ownedfp;
5476 abi_long sc_fpregs[32];
5477 abi_ulong sc_fpcr;
5478 abi_ulong sc_fp_control;
5479 abi_ulong sc_reserved1;
5480 abi_ulong sc_reserved2;
5481 abi_ulong sc_ssize;
5482 abi_ulong sc_sbase;
5483 abi_ulong sc_traparg_a0;
5484 abi_ulong sc_traparg_a1;
5485 abi_ulong sc_traparg_a2;
5486 abi_ulong sc_fp_trap_pc;
5487 abi_ulong sc_fp_trigger_sum;
5488 abi_ulong sc_fp_trigger_inst;
5489};
5490
5491struct target_ucontext {
60e99246
AJ		 5492 abi_ulong tuc_flags;
5493 abi_ulong tuc_link;
5494 abi_ulong tuc_osf_sigmask;
5495 target_stack_t tuc_stack;
5496 struct target_sigcontext tuc_mcontext;
5497 target_sigset_t tuc_sigmask;
6049f4f8
RH		 5498};
5499
5500struct target_sigframe {
5501 struct target_sigcontext sc;
5502 unsigned int retcode[3];
5503};
5504
5505struct target_rt_sigframe {
5506 target_siginfo_t info;
5507 struct target_ucontext uc;
5508 unsigned int retcode[3];
5509};
5510
5511#define INSN_MOV_R30_R16 0x47fe0410
5512#define INSN_LDI_R0 0x201f0000
5513#define INSN_CALLSYS 0x00000083
5514
41ecc72b 5515static void setup_sigcontext(struct target_sigcontext *sc, CPUAlphaState *env,
da7c8647 5516 abi_ulong frame_addr, target_sigset_t *set)
6049f4f8 5517{
41ecc72b 5518 int i;
6049f4f8 5519
1d8b512b
RV		 5520 __put_user(on_sig_stack(frame_addr), &sc->sc_onstack);
5521 __put_user(set->sig[0], &sc->sc_mask);
5522 __put_user(env->pc, &sc->sc_pc);
5523 __put_user(8, &sc->sc_ps);
6049f4f8
RH		 5524
5525 for (i = 0; i < 31; ++i) {
1d8b512b 5526 __put_user(env->ir[i], &sc->sc_regs[i]);
6049f4f8 5527 }
1d8b512b 5528 __put_user(0, &sc->sc_regs[31]);
6049f4f8
RH		 5529
5530 for (i = 0; i < 31; ++i) {
1d8b512b 5531 __put_user(env->fir[i], &sc->sc_fpregs[i]);
6049f4f8 5532 }
1d8b512b
RV		 5533 __put_user(0, &sc->sc_fpregs[31]);
5534 __put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr);
6049f4f8 5535
1d8b512b
RV		 5536 __put_user(0, &sc->sc_traparg_a0); /* FIXME */
5537 __put_user(0, &sc->sc_traparg_a1); /* FIXME */
5538 __put_user(0, &sc->sc_traparg_a2); /* FIXME */
6049f4f8
RH		 5539}
5540
016d2e1d 5541static void restore_sigcontext(CPUAlphaState *env,
da7c8647 5542 struct target_sigcontext *sc)
6049f4f8
RH		 5543{
5544 uint64_t fpcr;
016d2e1d 5545 int i;
6049f4f8 5546
1d8b512b 5547 __get_user(env->pc, &sc->sc_pc);
6049f4f8
RH		 5548
5549 for (i = 0; i < 31; ++i) {
1d8b512b 5550 __get_user(env->ir[i], &sc->sc_regs[i]);
6049f4f8
RH		 5551 }
5552 for (i = 0; i < 31; ++i) {
1d8b512b 5553 __get_user(env->fir[i], &sc->sc_fpregs[i]);
6049f4f8
RH		 5554 }
5555
1d8b512b 5556 __get_user(fpcr, &sc->sc_fpcr);
6049f4f8 5557 cpu_alpha_store_fpcr(env, fpcr);
6049f4f8
RH		 5558}
5559
5560static inline abi_ulong get_sigframe(struct target_sigaction *sa,
05390248
AF		 5561 CPUAlphaState *env,
5562 unsigned long framesize)
6049f4f8
RH		 5563{
5564 abi_ulong sp = env->ir[IR_SP];
5565
5566 /* This is the X/Open sanctioned signal stack switching. */
5567 if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) {
5568 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
5569 }
5570 return (sp - framesize) & -32;
5571}
5572
5573static void setup_frame(int sig, struct target_sigaction *ka,
05390248 5574 target_sigset_t *set, CPUAlphaState *env)
6049f4f8
RH		 5575{
5576 abi_ulong frame_addr, r26;
5577 struct target_sigframe *frame;
5578 int err = 0;
5579
5580 frame_addr = get_sigframe(ka, env, sizeof(*frame));
c8ee0a44 5581 trace_user_setup_frame(env, frame_addr);
6049f4f8
RH		 5582 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5583 goto give_sigsegv;
5584 }
5585
41ecc72b 5586 setup_sigcontext(&frame->sc, env, frame_addr, set);
6049f4f8
RH		 5587
5588 if (ka->sa_restorer) {
5589 r26 = ka->sa_restorer;
5590 } else {
1d8b512b
RV		 5591 __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
5592 __put_user(INSN_LDI_R0 + TARGET_NR_sigreturn,
5593 &frame->retcode[1]);
5594 __put_user(INSN_CALLSYS, &frame->retcode[2]);
6049f4f8
RH		 5595 /* imb() */
5596 r26 = frame_addr;
5597 }
5598
5599 unlock_user_struct(frame, frame_addr, 1);
5600
5601 if (err) {
da7c8647 5602give_sigsegv:
09391669
PM		 5603 force_sigsegv(sig);
5604 return;
6049f4f8
RH		 5605 }
5606
5607 env->ir[IR_RA] = r26;
5608 env->ir[IR_PV] = env->pc = ka->_sa_handler;
5609 env->ir[IR_A0] = sig;
5610 env->ir[IR_A1] = 0;
5611 env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc);
5612 env->ir[IR_SP] = frame_addr;
5613}
5614
5615static void setup_rt_frame(int sig, struct target_sigaction *ka,
5616 target_siginfo_t *info,
05390248 5617 target_sigset_t *set, CPUAlphaState *env)
6049f4f8
RH		 5618{
5619 abi_ulong frame_addr, r26;
5620 struct target_rt_sigframe *frame;
5621 int i, err = 0;
5622
5623 frame_addr = get_sigframe(ka, env, sizeof(*frame));
c8ee0a44 5624 trace_user_setup_rt_frame(env, frame_addr);
6049f4f8
RH		 5625 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5626 goto give_sigsegv;
5627 }
5628
f6c7a05b 5629 tswap_siginfo(&frame->info, info);
6049f4f8 5630
1d8b512b
RV		 5631 __put_user(0, &frame->uc.tuc_flags);
5632 __put_user(0, &frame->uc.tuc_link);
5633 __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask);
5634 __put_user(target_sigaltstack_used.ss_sp,
5635 &frame->uc.tuc_stack.ss_sp);
5636 __put_user(sas_ss_flags(env->ir[IR_SP]),
5637 &frame->uc.tuc_stack.ss_flags);
5638 __put_user(target_sigaltstack_used.ss_size,
5639 &frame->uc.tuc_stack.ss_size);
41ecc72b 5640 setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set);
6049f4f8 5641 for (i = 0; i < TARGET_NSIG_WORDS; ++i) {
1d8b512b 5642 __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
6049f4f8
RH		 5643 }
5644
5645 if (ka->sa_restorer) {
5646 r26 = ka->sa_restorer;
5647 } else {
1d8b512b
RV		 5648 __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
5649 __put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn,
5650 &frame->retcode[1]);
5651 __put_user(INSN_CALLSYS, &frame->retcode[2]);
6049f4f8
RH		 5652 /* imb(); */
5653 r26 = frame_addr;
5654 }
5655
5656 if (err) {
da7c8647 5657give_sigsegv:
09391669
PM		 5658 force_sigsegv(sig);
5659 return;
6049f4f8
RH		 5660 }
5661
5662 env->ir[IR_RA] = r26;
5663 env->ir[IR_PV] = env->pc = ka->_sa_handler;
5664 env->ir[IR_A0] = sig;
5665 env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info);
5666 env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
5667 env->ir[IR_SP] = frame_addr;
5668}
5669
05390248 5670long do_sigreturn(CPUAlphaState *env)
6049f4f8
RH		 5671{
5672 struct target_sigcontext *sc;
5673 abi_ulong sc_addr = env->ir[IR_A0];
5674 target_sigset_t target_set;
5675 sigset_t set;
5676
5677 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) {
5678 goto badframe;
5679 }
5680
5681 target_sigemptyset(&target_set);
f5f601af 5682 __get_user(target_set.sig[0], &sc->sc_mask);
6049f4f8
RH		 5683
5684 target_to_host_sigset_internal(&set, &target_set);
9eede5b6 5685 set_sigmask(&set);
6049f4f8 5686
016d2e1d 5687 restore_sigcontext(env, sc);
6049f4f8 5688 unlock_user_struct(sc, sc_addr, 0);
338c858c 5689 return -TARGET_QEMU_ESIGRETURN;
6049f4f8 5690
da7c8647 5691badframe:
6049f4f8 5692 force_sig(TARGET_SIGSEGV);
c599d4d6 5693 return -TARGET_QEMU_ESIGRETURN;
6049f4f8
RH		 5694}
5695
05390248 5696long do_rt_sigreturn(CPUAlphaState *env)
6049f4f8
RH		 5697{
5698 abi_ulong frame_addr = env->ir[IR_A0];
5699 struct target_rt_sigframe *frame;
5700 sigset_t set;
5701
c8ee0a44 5702 trace_user_do_rt_sigreturn(env, frame_addr);
6049f4f8
RH		 5703 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
5704 goto badframe;
5705 }
60e99246 5706 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
9eede5b6 5707 set_sigmask(&set);
6049f4f8 5708
016d2e1d 5709 restore_sigcontext(env, &frame->uc.tuc_mcontext);
6049f4f8 5710 if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
60e99246 5711 uc.tuc_stack),
6049f4f8
RH		 5712 0, env->ir[IR_SP]) == -EFAULT) {
5713 goto badframe;
5714 }
5715
5716 unlock_user_struct(frame, frame_addr, 0);
338c858c 5717 return -TARGET_QEMU_ESIGRETURN;
6049f4f8
RH		 5718
5719
da7c8647 5720badframe:
6049f4f8
RH		 5721 unlock_user_struct(frame, frame_addr, 0);
5722 force_sig(TARGET_SIGSEGV);
c599d4d6 5723 return -TARGET_QEMU_ESIGRETURN;
6049f4f8
RH		 5724}
5725
bf0f60a6
CG		 5726#elif defined(TARGET_TILEGX)
5727
5728struct target_sigcontext {
5729 union {
5730 /* General-purpose registers. */
5731 abi_ulong gregs[56];
5732 struct {
5733 abi_ulong __gregs[53];
5734 abi_ulong tp; /* Aliases gregs[TREG_TP]. */
5735 abi_ulong sp; /* Aliases gregs[TREG_SP]. */
5736 abi_ulong lr; /* Aliases gregs[TREG_LR]. */
5737 };
5738 };
5739 abi_ulong pc; /* Program counter. */
5740 abi_ulong ics; /* In Interrupt Critical Section? */
5741 abi_ulong faultnum; /* Fault number. */
5742 abi_ulong pad[5];
5743};
5744
5745struct target_ucontext {
5746 abi_ulong tuc_flags;
5747 abi_ulong tuc_link;
5748 target_stack_t tuc_stack;
5749 struct target_sigcontext tuc_mcontext;
5750 target_sigset_t tuc_sigmask; /* mask last for extensibility */
5751};
5752
5753struct target_rt_sigframe {
5754 unsigned char save_area[16]; /* caller save area */
5755 struct target_siginfo info;
5756 struct target_ucontext uc;
f1d9d107 5757 abi_ulong retcode[2];
bf0f60a6
CG		 5758};
5759
f1d9d107
CG		 5760#define INSN_MOVELI_R10_139 0x00045fe551483000ULL /* { moveli r10, 139 } */
5761#define INSN_SWINT1 0x286b180051485000ULL /* { swint1 } */
5762
5763
bf0f60a6
CG		 5764static void setup_sigcontext(struct target_sigcontext *sc,
5765 CPUArchState *env, int signo)
5766{
5767 int i;
5768
5769 for (i = 0; i < TILEGX_R_COUNT; ++i) {
5770 __put_user(env->regs[i], &sc->gregs[i]);
5771 }
5772
5773 __put_user(env->pc, &sc->pc);
5774 __put_user(0, &sc->ics);
5775 __put_user(signo, &sc->faultnum);
5776}
5777
5778static void restore_sigcontext(CPUTLGState *env, struct target_sigcontext *sc)
5779{
5780 int i;
5781
5782 for (i = 0; i < TILEGX_R_COUNT; ++i) {
5783 __get_user(env->regs[i], &sc->gregs[i]);
5784 }
5785
5786 __get_user(env->pc, &sc->pc);
5787}
5788
5789static abi_ulong get_sigframe(struct target_sigaction *ka, CPUArchState *env,
5790 size_t frame_size)
5791{
5792 unsigned long sp = env->regs[TILEGX_R_SP];
5793
5794 if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size))) {
5795 return -1UL;
5796 }
5797
5798 if ((ka->sa_flags & SA_ONSTACK) && !sas_ss_flags(sp)) {
5799 sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
5800 }
5801
5802 sp -= frame_size;
5803 sp &= -16UL;
5804 return sp;
5805}
5806
5807static void setup_rt_frame(int sig, struct target_sigaction *ka,
5808 target_siginfo_t *info,
5809 target_sigset_t *set, CPUArchState *env)
5810{
5811 abi_ulong frame_addr;
5812 struct target_rt_sigframe *frame;
5813 unsigned long restorer;
5814
5815 frame_addr = get_sigframe(ka, env, sizeof(*frame));
c8ee0a44 5816 trace_user_setup_rt_frame(env, frame_addr);
bf0f60a6
CG		 5817 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
5818 goto give_sigsegv;
5819 }
5820
5821 /* Always write at least the signal number for the stack backtracer. */
5822 if (ka->sa_flags & TARGET_SA_SIGINFO) {
5823 /* At sigreturn time, restore the callee-save registers too. */
5824 tswap_siginfo(&frame->info, info);
5825 /* regs->flags |= PT_FLAGS_RESTORE_REGS; FIXME: we can skip it? */
5826 } else {
5827 __put_user(info->si_signo, &frame->info.si_signo);
5828 }
5829
5830 /* Create the ucontext. */
5831 __put_user(0, &frame->uc.tuc_flags);
5832 __put_user(0, &frame->uc.tuc_link);
5833 __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp);
5834 __put_user(sas_ss_flags(env->regs[TILEGX_R_SP]),
5835 &frame->uc.tuc_stack.ss_flags);
5836 __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size);
5837 setup_sigcontext(&frame->uc.tuc_mcontext, env, info->si_signo);
5838
bf0f60a6 5839 if (ka->sa_flags & TARGET_SA_RESTORER) {
f1d9d107
CG		 5840 restorer = (unsigned long) ka->sa_restorer;
5841 } else {
5842 __put_user(INSN_MOVELI_R10_139, &frame->retcode[0]);
5843 __put_user(INSN_SWINT1, &frame->retcode[1]);
5844 restorer = frame_addr + offsetof(struct target_rt_sigframe, retcode);
bf0f60a6
CG		 5845 }
5846 env->pc = (unsigned long) ka->_sa_handler;
5847 env->regs[TILEGX_R_SP] = (unsigned long) frame;
5848 env->regs[TILEGX_R_LR] = restorer;
5849 env->regs[0] = (unsigned long) sig;
5850 env->regs[1] = (unsigned long) &frame->info;
5851 env->regs[2] = (unsigned long) &frame->uc;
5852 /* regs->flags |= PT_FLAGS_CALLER_SAVES; FIXME: we can skip it? */
5853
5854 unlock_user_struct(frame, frame_addr, 1);
5855 return;
5856
5857give_sigsegv:
09391669 5858 force_sigsegv(sig);
bf0f60a6
CG		 5859}
5860
5861long do_rt_sigreturn(CPUTLGState *env)
5862{
5863 abi_ulong frame_addr = env->regs[TILEGX_R_SP];
5864 struct target_rt_sigframe *frame;
5865 sigset_t set;
5866
c8ee0a44 5867 trace_user_do_rt_sigreturn(env, frame_addr);
bf0f60a6
CG		 5868 if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
5869 goto badframe;
5870 }
5871 target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
9eede5b6 5872 set_sigmask(&set);
bf0f60a6
CG		 5873
5874 restore_sigcontext(env, &frame->uc.tuc_mcontext);
5875 if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe,
5876 uc.tuc_stack),
5877 0, env->regs[TILEGX_R_SP]) == -EFAULT) {
5878 goto badframe;
5879 }
5880
5881 unlock_user_struct(frame, frame_addr, 0);
a9175169 5882 return -TARGET_QEMU_ESIGRETURN;
bf0f60a6
CG		 5883
5884
5885 badframe:
5886 unlock_user_struct(frame, frame_addr, 0);
5887 force_sig(TARGET_SIGSEGV);
c599d4d6 5888 return -TARGET_QEMU_ESIGRETURN;
bf0f60a6
CG		 5889}
5890
b346ff46
FB		 5891#else
5892
624f7979 5893static void setup_frame(int sig, struct target_sigaction *ka,
da7c8647 5894 target_sigset_t *set, CPUArchState *env)
b346ff46
FB		 5895{
5896 fprintf(stderr, "setup_frame: not implemented\n");
5897}
5898
624f7979 5899static void setup_rt_frame(int sig, struct target_sigaction *ka,
c227f099 5900 target_siginfo_t *info,
da7c8647 5901 target_sigset_t *set, CPUArchState *env)
b346ff46
FB		 5902{
5903 fprintf(stderr, "setup_rt_frame: not implemented\n");
5904}
5905
9349b4f9 5906long do_sigreturn(CPUArchState *env)
b346ff46
FB		 5907{
5908 fprintf(stderr, "do_sigreturn: not implemented\n");
f8b0aa25 5909 return -TARGET_ENOSYS;
b346ff46
FB		 5910}
5911
9349b4f9 5912long do_rt_sigreturn(CPUArchState *env)
b346ff46
FB		 5913{
5914 fprintf(stderr, "do_rt_sigreturn: not implemented\n");
f8b0aa25 5915 return -TARGET_ENOSYS;
b346ff46
FB		 5916}
5917
66fb9763
FB		 5918#endif
5919
31efaef1
PM		 5920static void handle_pending_signal(CPUArchState *cpu_env, int sig,
5921 struct emulated_sigtable *k)
eb552501
PM		 5922{
5923 CPUState *cpu = ENV_GET_CPU(cpu_env);
5924 abi_ulong handler;
3d3efba0 5925 sigset_t set;
eb552501
PM		 5926 target_sigset_t target_old_set;
5927 struct target_sigaction *sa;
eb552501 5928 TaskState *ts = cpu->opaque;
66fb9763 5929
c8ee0a44 5930 trace_user_handle_signal(cpu_env, sig);
66fb9763 5931 /* dequeue signal */
907f5fdd 5932 k->pending = 0;
3b46e624 5933
db6b81d4 5934 sig = gdb_handlesig(cpu, sig);
1fddef4b 5935 if (!sig) {
ca587a8e
AJ		 5936 sa = NULL;
5937 handler = TARGET_SIG_IGN;
5938 } else {
5939 sa = &sigact_table[sig - 1];
5940 handler = sa->_sa_handler;
1fddef4b 5941 }
66fb9763 5942
0cb581d6
PM		 5943 if (do_strace) {
5944 print_taken_signal(sig, &k->info);
5945 }
5946
66fb9763 5947 if (handler == TARGET_SIG_DFL) {
ca587a8e
AJ		 5948 /* default handler : ignore some signal. The other are job control or fatal */
5949 if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
5950 kill(getpid(),SIGSTOP);
5951 } else if (sig != TARGET_SIGCHLD &&
5952 sig != TARGET_SIGURG &&
5953 sig != TARGET_SIGWINCH &&
5954 sig != TARGET_SIGCONT) {
c599d4d6 5955 dump_core_and_abort(sig);
66fb9763
FB		 5956 }
5957 } else if (handler == TARGET_SIG_IGN) {
5958 /* ignore sig */
5959 } else if (handler == TARGET_SIG_ERR) {
c599d4d6 5960 dump_core_and_abort(sig);
66fb9763 5961 } else {
9de5e440 5962 /* compute the blocked signals during the handler execution */
3d3efba0
PM		 5963 sigset_t *blocked_set;
5964
624f7979 5965 target_to_host_sigset(&set, &sa->sa_mask);
9de5e440
FB		 5966 /* SA_NODEFER indicates that the current signal should not be
5967 blocked during the handler */
624f7979 5968 if (!(sa->sa_flags & TARGET_SA_NODEFER))
9de5e440 5969 sigaddset(&set, target_to_host_signal(sig));
3b46e624 5970
9de5e440
FB		 5971 /* save the previous blocked signal state to restore it at the
5972 end of the signal execution (see do_sigreturn) */
3d3efba0
PM		 5973 host_to_target_sigset_internal(&target_old_set, &ts->signal_mask);
5974
5975 /* block signals in the handler */
5976 blocked_set = ts->in_sigsuspend ?
5977 &ts->sigsuspend_mask : &ts->signal_mask;
5978 sigorset(&ts->signal_mask, blocked_set, &set);
5979 ts->in_sigsuspend = 0;
9de5e440 5980
bc8a22cc 5981 /* if the CPU is in VM86 mode, we restore the 32 bit values */
84409ddb 5982#if defined(TARGET_I386) && !defined(TARGET_X86_64)
bc8a22cc
FB		 5983 {
5984 CPUX86State *env = cpu_env;
5985 if (env->eflags & VM_MASK)
5986 save_v86_state(env);
5987 }
5988#endif
9de5e440 5989 /* prepare the stack frame of the virtual CPU */
d0924a26 5990#if defined(TARGET_ABI_MIPSN32) || defined(TARGET_ABI_MIPSN64) \
95cda4c4
BH		 5991 || defined(TARGET_OPENRISC) || defined(TARGET_TILEGX) \
5992 || defined(TARGET_PPC64)
ff970904 5993 /* These targets do not have traditional signals. */
907f5fdd 5994 setup_rt_frame(sig, sa, &k->info, &target_old_set, cpu_env);
ff970904 5995#else
624f7979 5996 if (sa->sa_flags & TARGET_SA_SIGINFO)
907f5fdd 5997 setup_rt_frame(sig, sa, &k->info, &target_old_set, cpu_env);
66fb9763 5998 else
624f7979 5999 setup_frame(sig, sa, &target_old_set, cpu_env);
ff970904 6000#endif
7ec87e06 6001 if (sa->sa_flags & TARGET_SA_RESETHAND) {
624f7979 6002 sa->_sa_handler = TARGET_SIG_DFL;
7ec87e06 6003 }
31e31b8a 6004 }
66fb9763 6005}
e902d588
PM		 6006
6007void process_pending_signals(CPUArchState *cpu_env)
6008{
6009 CPUState *cpu = ENV_GET_CPU(cpu_env);
6010 int sig;
6011 TaskState *ts = cpu->opaque;
3d3efba0
PM		 6012 sigset_t set;
6013 sigset_t *blocked_set;
e902d588 6014
3d3efba0
PM		 6015 while (atomic_read(&ts->signal_pending)) {
6016 /* FIXME: This is not threadsafe. */
6017 sigfillset(&set);
6018 sigprocmask(SIG_SETMASK, &set, 0);
6019
8bd3773c 6020 restart_scan:
655ed67c
TB		 6021 sig = ts->sync_signal.pending;
6022 if (sig) {
6023 /* Synchronous signals are forced,
6024 * see force_sig_info() and callers in Linux
6025 * Note that not all of our queue_signal() calls in QEMU correspond
6026 * to force_sig_info() calls in Linux (some are send_sig_info()).
6027 * However it seems like a kernel bug to me to allow the process
6028 * to block a synchronous signal since it could then just end up
6029 * looping round and round indefinitely.
6030 */
6031 if (sigismember(&ts->signal_mask, target_to_host_signal_table[sig])
6032 || sigact_table[sig - 1]._sa_handler == TARGET_SIG_IGN) {
6033 sigdelset(&ts->signal_mask, target_to_host_signal_table[sig]);
6034 sigact_table[sig - 1]._sa_handler = TARGET_SIG_DFL;
6035 }
6036
31efaef1 6037 handle_pending_signal(cpu_env, sig, &ts->sync_signal);
655ed67c
TB		 6038 }
6039
3d3efba0
PM		 6040 for (sig = 1; sig <= TARGET_NSIG; sig++) {
6041 blocked_set = ts->in_sigsuspend ?
6042 &ts->sigsuspend_mask : &ts->signal_mask;
6043
6044 if (ts->sigtab[sig - 1].pending &&
6045 (!sigismember(blocked_set,
655ed67c 6046 target_to_host_signal_table[sig]))) {
31efaef1 6047 handle_pending_signal(cpu_env, sig, &ts->sigtab[sig - 1]);
8bd3773c
PM		 6048 /* Restart scan from the beginning, as handle_pending_signal
6049 * might have resulted in a new synchronous signal (eg SIGSEGV).
6050 */
6051 goto restart_scan;
3d3efba0 6052 }
e902d588 6053 }
3d3efba0
PM		 6054
6055 /* if no signal is pending, unblock signals and recheck (the act
6056 * of unblocking might cause us to take another host signal which
6057 * will set signal_pending again).
6058 */
6059 atomic_set(&ts->signal_pending, 0);
6060 ts->in_sigsuspend = 0;
6061 set = ts->signal_mask;
6062 sigdelset(&set, SIGSEGV);
6063 sigdelset(&set, SIGBUS);
6064 sigprocmask(SIG_SETMASK, &set, 0);
6065 }
6066 ts->in_sigsuspend = 0;
e902d588 6067}
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