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Commit | Line | Data |
---|---|---|
31e31b8a | 1 | /* |
66fb9763 | 2 | * Emulation of Linux signals |
5fafdf24 | 3 | * |
31e31b8a FB |
4 | * Copyright (c) 2003 Fabrice Bellard |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | #include <stdlib.h> | |
21 | #include <stdio.h> | |
66fb9763 | 22 | #include <string.h> |
31e31b8a | 23 | #include <stdarg.h> |
2677e107 | 24 | #include <unistd.h> |
31e31b8a | 25 | #include <signal.h> |
66fb9763 | 26 | #include <errno.h> |
31e31b8a FB |
27 | #include <sys/ucontext.h> |
28 | ||
3ef693a0 | 29 | #include "qemu.h" |
992f48a0 | 30 | #include "target_signal.h" |
66fb9763 FB |
31 | |
32 | //#define DEBUG_SIGNAL | |
33 | ||
34 | #define MAX_SIGQUEUE_SIZE 1024 | |
35 | ||
36 | struct sigqueue { | |
37 | struct sigqueue *next; | |
9de5e440 | 38 | target_siginfo_t info; |
66fb9763 | 39 | }; |
31e31b8a FB |
40 | |
41 | struct emulated_sigaction { | |
42 | struct target_sigaction sa; | |
66fb9763 FB |
43 | int pending; /* true if signal is pending */ |
44 | struct sigqueue *first; | |
45 | struct sigqueue info; /* in order to always have memory for the | |
46 | first signal, we put it here */ | |
31e31b8a FB |
47 | }; |
48 | ||
a04e134a TS |
49 | struct target_sigaltstack target_sigaltstack_used = { |
50 | .ss_sp = 0, | |
51 | .ss_size = 0, | |
52 | .ss_flags = TARGET_SS_DISABLE, | |
53 | }; | |
54 | ||
66fb9763 FB |
55 | static struct emulated_sigaction sigact_table[TARGET_NSIG]; |
56 | static struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */ | |
57 | static struct sigqueue *first_free; /* first free siginfo queue entry */ | |
58 | static int signal_pending; /* non zero if a signal may be pending */ | |
31e31b8a | 59 | |
5fafdf24 | 60 | static void host_signal_handler(int host_signum, siginfo_t *info, |
66fb9763 FB |
61 | void *puc); |
62 | ||
9e5f5284 FB |
63 | static uint8_t host_to_target_signal_table[65] = { |
64 | [SIGHUP] = TARGET_SIGHUP, | |
65 | [SIGINT] = TARGET_SIGINT, | |
66 | [SIGQUIT] = TARGET_SIGQUIT, | |
67 | [SIGILL] = TARGET_SIGILL, | |
68 | [SIGTRAP] = TARGET_SIGTRAP, | |
69 | [SIGABRT] = TARGET_SIGABRT, | |
01e3b763 | 70 | /* [SIGIOT] = TARGET_SIGIOT,*/ |
9e5f5284 FB |
71 | [SIGBUS] = TARGET_SIGBUS, |
72 | [SIGFPE] = TARGET_SIGFPE, | |
73 | [SIGKILL] = TARGET_SIGKILL, | |
74 | [SIGUSR1] = TARGET_SIGUSR1, | |
75 | [SIGSEGV] = TARGET_SIGSEGV, | |
76 | [SIGUSR2] = TARGET_SIGUSR2, | |
77 | [SIGPIPE] = TARGET_SIGPIPE, | |
78 | [SIGALRM] = TARGET_SIGALRM, | |
79 | [SIGTERM] = TARGET_SIGTERM, | |
80 | #ifdef SIGSTKFLT | |
81 | [SIGSTKFLT] = TARGET_SIGSTKFLT, | |
82 | #endif | |
83 | [SIGCHLD] = TARGET_SIGCHLD, | |
84 | [SIGCONT] = TARGET_SIGCONT, | |
85 | [SIGSTOP] = TARGET_SIGSTOP, | |
86 | [SIGTSTP] = TARGET_SIGTSTP, | |
87 | [SIGTTIN] = TARGET_SIGTTIN, | |
88 | [SIGTTOU] = TARGET_SIGTTOU, | |
89 | [SIGURG] = TARGET_SIGURG, | |
90 | [SIGXCPU] = TARGET_SIGXCPU, | |
91 | [SIGXFSZ] = TARGET_SIGXFSZ, | |
92 | [SIGVTALRM] = TARGET_SIGVTALRM, | |
93 | [SIGPROF] = TARGET_SIGPROF, | |
94 | [SIGWINCH] = TARGET_SIGWINCH, | |
95 | [SIGIO] = TARGET_SIGIO, | |
96 | [SIGPWR] = TARGET_SIGPWR, | |
97 | [SIGSYS] = TARGET_SIGSYS, | |
98 | /* next signals stay the same */ | |
99 | }; | |
100 | static uint8_t target_to_host_signal_table[65]; | |
101 | ||
a04e134a TS |
102 | static inline int on_sig_stack(unsigned long sp) |
103 | { | |
104 | return (sp - target_sigaltstack_used.ss_sp | |
105 | < target_sigaltstack_used.ss_size); | |
106 | } | |
107 | ||
108 | static inline int sas_ss_flags(unsigned long sp) | |
109 | { | |
110 | return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE | |
111 | : on_sig_stack(sp) ? SS_ONSTACK : 0); | |
112 | } | |
113 | ||
31e31b8a FB |
114 | static inline int host_to_target_signal(int sig) |
115 | { | |
9e5f5284 | 116 | return host_to_target_signal_table[sig]; |
31e31b8a FB |
117 | } |
118 | ||
119 | static inline int target_to_host_signal(int sig) | |
120 | { | |
9e5f5284 | 121 | return target_to_host_signal_table[sig]; |
31e31b8a FB |
122 | } |
123 | ||
5fafdf24 | 124 | static void host_to_target_sigset_internal(target_sigset_t *d, |
9231944d | 125 | const sigset_t *s) |
66fb9763 FB |
126 | { |
127 | int i; | |
9e5f5284 FB |
128 | unsigned long sigmask; |
129 | uint32_t target_sigmask; | |
3b46e624 | 130 | |
9e5f5284 FB |
131 | sigmask = ((unsigned long *)s)[0]; |
132 | target_sigmask = 0; | |
133 | for(i = 0; i < 32; i++) { | |
5fafdf24 | 134 | if (sigmask & (1 << i)) |
9e5f5284 FB |
135 | target_sigmask |= 1 << (host_to_target_signal(i + 1) - 1); |
136 | } | |
992f48a0 | 137 | #if TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 32 |
9231944d | 138 | d->sig[0] = target_sigmask; |
9e5f5284 | 139 | for(i = 1;i < TARGET_NSIG_WORDS; i++) { |
9231944d | 140 | d->sig[i] = ((unsigned long *)s)[i]; |
66fb9763 | 141 | } |
992f48a0 | 142 | #elif TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2 |
9231944d FB |
143 | d->sig[0] = target_sigmask; |
144 | d->sig[1] = sigmask >> 32; | |
9e5f5284 | 145 | #else |
a315a145 | 146 | #warning host_to_target_sigset |
9e5f5284 | 147 | #endif |
66fb9763 FB |
148 | } |
149 | ||
9231944d FB |
150 | void host_to_target_sigset(target_sigset_t *d, const sigset_t *s) |
151 | { | |
152 | target_sigset_t d1; | |
153 | int i; | |
154 | ||
155 | host_to_target_sigset_internal(&d1, s); | |
156 | for(i = 0;i < TARGET_NSIG_WORDS; i++) | |
53a5960a | 157 | d->sig[i] = tswapl(d1.sig[i]); |
9231944d FB |
158 | } |
159 | ||
160 | void target_to_host_sigset_internal(sigset_t *d, const target_sigset_t *s) | |
66fb9763 FB |
161 | { |
162 | int i; | |
9e5f5284 | 163 | unsigned long sigmask; |
992f48a0 | 164 | abi_ulong target_sigmask; |
9e5f5284 | 165 | |
9231944d | 166 | target_sigmask = s->sig[0]; |
9e5f5284 FB |
167 | sigmask = 0; |
168 | for(i = 0; i < 32; i++) { | |
5fafdf24 | 169 | if (target_sigmask & (1 << i)) |
9e5f5284 FB |
170 | sigmask |= 1 << (target_to_host_signal(i + 1) - 1); |
171 | } | |
992f48a0 | 172 | #if TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 32 |
9e5f5284 FB |
173 | ((unsigned long *)d)[0] = sigmask; |
174 | for(i = 1;i < TARGET_NSIG_WORDS; i++) { | |
9231944d | 175 | ((unsigned long *)d)[i] = s->sig[i]; |
66fb9763 | 176 | } |
992f48a0 | 177 | #elif TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2 |
9231944d | 178 | ((unsigned long *)d)[0] = sigmask | ((unsigned long)(s->sig[1]) << 32); |
9e5f5284 | 179 | #else |
a315a145 | 180 | #warning target_to_host_sigset |
992f48a0 | 181 | #endif /* TARGET_ABI_BITS */ |
66fb9763 FB |
182 | } |
183 | ||
9231944d FB |
184 | void target_to_host_sigset(sigset_t *d, const target_sigset_t *s) |
185 | { | |
186 | target_sigset_t s1; | |
187 | int i; | |
188 | ||
189 | for(i = 0;i < TARGET_NSIG_WORDS; i++) | |
53a5960a | 190 | s1.sig[i] = tswapl(s->sig[i]); |
9231944d FB |
191 | target_to_host_sigset_internal(d, &s1); |
192 | } | |
3b46e624 | 193 | |
992f48a0 | 194 | void host_to_target_old_sigset(abi_ulong *old_sigset, |
66fb9763 FB |
195 | const sigset_t *sigset) |
196 | { | |
9e5f5284 FB |
197 | target_sigset_t d; |
198 | host_to_target_sigset(&d, sigset); | |
199 | *old_sigset = d.sig[0]; | |
66fb9763 FB |
200 | } |
201 | ||
5fafdf24 | 202 | void target_to_host_old_sigset(sigset_t *sigset, |
992f48a0 | 203 | const abi_ulong *old_sigset) |
66fb9763 | 204 | { |
9e5f5284 FB |
205 | target_sigset_t d; |
206 | int i; | |
207 | ||
208 | d.sig[0] = *old_sigset; | |
209 | for(i = 1;i < TARGET_NSIG_WORDS; i++) | |
210 | d.sig[i] = 0; | |
211 | target_to_host_sigset(sigset, &d); | |
66fb9763 FB |
212 | } |
213 | ||
9de5e440 FB |
214 | /* siginfo conversion */ |
215 | ||
5fafdf24 | 216 | static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo, |
9de5e440 | 217 | const siginfo_t *info) |
66fb9763 | 218 | { |
9de5e440 FB |
219 | int sig; |
220 | sig = host_to_target_signal(info->si_signo); | |
221 | tinfo->si_signo = sig; | |
222 | tinfo->si_errno = 0; | |
223 | tinfo->si_code = 0; | |
5fafdf24 | 224 | if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV || |
447db213 | 225 | sig == SIGBUS || sig == SIGTRAP) { |
9de5e440 FB |
226 | /* should never come here, but who knows. The information for |
227 | the target is irrelevant */ | |
228 | tinfo->_sifields._sigfault._addr = 0; | |
7f7f7c84 TS |
229 | } else if (sig == SIGIO) { |
230 | tinfo->_sifields._sigpoll._fd = info->si_fd; | |
9de5e440 FB |
231 | } else if (sig >= TARGET_SIGRTMIN) { |
232 | tinfo->_sifields._rt._pid = info->si_pid; | |
233 | tinfo->_sifields._rt._uid = info->si_uid; | |
234 | /* XXX: potential problem if 64 bit */ | |
5fafdf24 | 235 | tinfo->_sifields._rt._sigval.sival_ptr = |
992f48a0 | 236 | (abi_ulong)info->si_value.sival_ptr; |
9de5e440 FB |
237 | } |
238 | } | |
239 | ||
5fafdf24 | 240 | static void tswap_siginfo(target_siginfo_t *tinfo, |
9de5e440 FB |
241 | const target_siginfo_t *info) |
242 | { | |
243 | int sig; | |
244 | sig = info->si_signo; | |
245 | tinfo->si_signo = tswap32(sig); | |
66fb9763 FB |
246 | tinfo->si_errno = tswap32(info->si_errno); |
247 | tinfo->si_code = tswap32(info->si_code); | |
5fafdf24 | 248 | if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV || |
447db213 | 249 | sig == SIGBUS || sig == SIGTRAP) { |
5fafdf24 | 250 | tinfo->_sifields._sigfault._addr = |
9de5e440 | 251 | tswapl(info->_sifields._sigfault._addr); |
7f7f7c84 TS |
252 | } else if (sig == SIGIO) { |
253 | tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd); | |
9de5e440 FB |
254 | } else if (sig >= TARGET_SIGRTMIN) { |
255 | tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid); | |
256 | tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid); | |
5fafdf24 | 257 | tinfo->_sifields._rt._sigval.sival_ptr = |
9de5e440 FB |
258 | tswapl(info->_sifields._rt._sigval.sival_ptr); |
259 | } | |
260 | } | |
261 | ||
262 | ||
263 | void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info) | |
264 | { | |
265 | host_to_target_siginfo_noswap(tinfo, info); | |
266 | tswap_siginfo(tinfo, tinfo); | |
66fb9763 FB |
267 | } |
268 | ||
9de5e440 | 269 | /* XXX: we support only POSIX RT signals are used. */ |
aa1f17c1 | 270 | /* XXX: find a solution for 64 bit (additional malloced data is needed) */ |
9de5e440 | 271 | void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo) |
66fb9763 FB |
272 | { |
273 | info->si_signo = tswap32(tinfo->si_signo); | |
274 | info->si_errno = tswap32(tinfo->si_errno); | |
275 | info->si_code = tswap32(tinfo->si_code); | |
9de5e440 FB |
276 | info->si_pid = tswap32(tinfo->_sifields._rt._pid); |
277 | info->si_uid = tswap32(tinfo->_sifields._rt._uid); | |
5fafdf24 | 278 | info->si_value.sival_ptr = |
9de5e440 | 279 | (void *)tswapl(tinfo->_sifields._rt._sigval.sival_ptr); |
66fb9763 FB |
280 | } |
281 | ||
31e31b8a FB |
282 | void signal_init(void) |
283 | { | |
284 | struct sigaction act; | |
9e5f5284 | 285 | int i, j; |
31e31b8a | 286 | |
9e5f5284 FB |
287 | /* generate signal conversion tables */ |
288 | for(i = 1; i <= 64; i++) { | |
289 | if (host_to_target_signal_table[i] == 0) | |
290 | host_to_target_signal_table[i] = i; | |
291 | } | |
292 | for(i = 1; i <= 64; i++) { | |
293 | j = host_to_target_signal_table[i]; | |
294 | target_to_host_signal_table[j] = i; | |
295 | } | |
3b46e624 | 296 | |
9de5e440 FB |
297 | /* set all host signal handlers. ALL signals are blocked during |
298 | the handlers to serialize them. */ | |
299 | sigfillset(&act.sa_mask); | |
31e31b8a FB |
300 | act.sa_flags = SA_SIGINFO; |
301 | act.sa_sigaction = host_signal_handler; | |
302 | for(i = 1; i < NSIG; i++) { | |
c9087c2a | 303 | sigaction(i, &act, NULL); |
31e31b8a | 304 | } |
3b46e624 | 305 | |
31e31b8a | 306 | memset(sigact_table, 0, sizeof(sigact_table)); |
66fb9763 FB |
307 | |
308 | first_free = &sigqueue_table[0]; | |
5fafdf24 | 309 | for(i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) |
66fb9763 FB |
310 | sigqueue_table[i].next = &sigqueue_table[i + 1]; |
311 | sigqueue_table[MAX_SIGQUEUE_SIZE - 1].next = NULL; | |
312 | } | |
313 | ||
314 | /* signal queue handling */ | |
315 | ||
316 | static inline struct sigqueue *alloc_sigqueue(void) | |
317 | { | |
318 | struct sigqueue *q = first_free; | |
319 | if (!q) | |
320 | return NULL; | |
321 | first_free = q->next; | |
322 | return q; | |
31e31b8a FB |
323 | } |
324 | ||
66fb9763 FB |
325 | static inline void free_sigqueue(struct sigqueue *q) |
326 | { | |
327 | q->next = first_free; | |
328 | first_free = q; | |
329 | } | |
330 | ||
9de5e440 FB |
331 | /* abort execution with signal */ |
332 | void __attribute((noreturn)) force_sig(int sig) | |
66fb9763 FB |
333 | { |
334 | int host_sig; | |
66fb9763 | 335 | host_sig = target_to_host_signal(sig); |
5fafdf24 | 336 | fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n", |
66fb9763 | 337 | sig, strsignal(host_sig)); |
9de5e440 | 338 | #if 1 |
66fb9763 | 339 | _exit(-host_sig); |
9de5e440 FB |
340 | #else |
341 | { | |
342 | struct sigaction act; | |
343 | sigemptyset(&act.sa_mask); | |
344 | act.sa_flags = SA_SIGINFO; | |
345 | act.sa_sigaction = SIG_DFL; | |
346 | sigaction(SIGABRT, &act, NULL); | |
347 | abort(); | |
348 | } | |
349 | #endif | |
66fb9763 FB |
350 | } |
351 | ||
9de5e440 FB |
352 | /* queue a signal so that it will be send to the virtual CPU as soon |
353 | as possible */ | |
354 | int queue_signal(int sig, target_siginfo_t *info) | |
31e31b8a | 355 | { |
66fb9763 | 356 | struct emulated_sigaction *k; |
9de5e440 | 357 | struct sigqueue *q, **pq; |
992f48a0 | 358 | abi_ulong handler; |
66fb9763 | 359 | |
9de5e440 | 360 | #if defined(DEBUG_SIGNAL) |
5fafdf24 | 361 | fprintf(stderr, "queue_signal: sig=%d\n", |
9de5e440 | 362 | sig); |
66fb9763 | 363 | #endif |
9de5e440 | 364 | k = &sigact_table[sig - 1]; |
66fb9763 FB |
365 | handler = k->sa._sa_handler; |
366 | if (handler == TARGET_SIG_DFL) { | |
367 | /* default handler : ignore some signal. The other are fatal */ | |
5fafdf24 TS |
368 | if (sig != TARGET_SIGCHLD && |
369 | sig != TARGET_SIGURG && | |
66fb9763 FB |
370 | sig != TARGET_SIGWINCH) { |
371 | force_sig(sig); | |
9de5e440 FB |
372 | } else { |
373 | return 0; /* indicate ignored */ | |
66fb9763 FB |
374 | } |
375 | } else if (handler == TARGET_SIG_IGN) { | |
376 | /* ignore signal */ | |
9de5e440 | 377 | return 0; |
66fb9763 FB |
378 | } else if (handler == TARGET_SIG_ERR) { |
379 | force_sig(sig); | |
380 | } else { | |
9de5e440 FB |
381 | pq = &k->first; |
382 | if (sig < TARGET_SIGRTMIN) { | |
383 | /* if non real time signal, we queue exactly one signal */ | |
384 | if (!k->pending) | |
385 | q = &k->info; | |
386 | else | |
387 | return 0; | |
388 | } else { | |
389 | if (!k->pending) { | |
390 | /* first signal */ | |
391 | q = &k->info; | |
392 | } else { | |
393 | q = alloc_sigqueue(); | |
394 | if (!q) | |
395 | return -EAGAIN; | |
396 | while (*pq != NULL) | |
397 | pq = &(*pq)->next; | |
398 | } | |
399 | } | |
400 | *pq = q; | |
401 | q->info = *info; | |
402 | q->next = NULL; | |
403 | k->pending = 1; | |
404 | /* signal that a new signal is pending */ | |
405 | signal_pending = 1; | |
406 | return 1; /* indicates that the signal was queued */ | |
407 | } | |
408 | } | |
409 | ||
5fafdf24 | 410 | static void host_signal_handler(int host_signum, siginfo_t *info, |
9de5e440 FB |
411 | void *puc) |
412 | { | |
413 | int sig; | |
414 | target_siginfo_t tinfo; | |
415 | ||
416 | /* the CPU emulator uses some host signals to detect exceptions, | |
417 | we we forward to it some signals */ | |
ec6338ba | 418 | if (host_signum == SIGSEGV || host_signum == SIGBUS) { |
b346ff46 | 419 | if (cpu_signal_handler(host_signum, info, puc)) |
9de5e440 FB |
420 | return; |
421 | } | |
422 | ||
423 | /* get target signal number */ | |
424 | sig = host_to_target_signal(host_signum); | |
425 | if (sig < 1 || sig > TARGET_NSIG) | |
426 | return; | |
427 | #if defined(DEBUG_SIGNAL) | |
bc8a22cc | 428 | fprintf(stderr, "qemu: got signal %d\n", sig); |
9de5e440 FB |
429 | #endif |
430 | host_to_target_siginfo_noswap(&tinfo, info); | |
431 | if (queue_signal(sig, &tinfo) == 1) { | |
432 | /* interrupt the virtual CPU as soon as possible */ | |
68a79315 | 433 | cpu_interrupt(global_env, CPU_INTERRUPT_EXIT); |
66fb9763 FB |
434 | } |
435 | } | |
436 | ||
0da46a6e | 437 | /* do_sigaltstack() returns target values and errnos. */ |
579a97f7 FB |
438 | /* compare linux/kernel/signal.c:do_sigaltstack() */ |
439 | abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp) | |
a04e134a TS |
440 | { |
441 | int ret; | |
442 | struct target_sigaltstack oss; | |
443 | ||
444 | /* XXX: test errors */ | |
579a97f7 | 445 | if(uoss_addr) |
a04e134a TS |
446 | { |
447 | __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp); | |
448 | __put_user(target_sigaltstack_used.ss_size, &oss.ss_size); | |
449 | __put_user(sas_ss_flags(sp), &oss.ss_flags); | |
450 | } | |
451 | ||
579a97f7 | 452 | if(uss_addr) |
a04e134a | 453 | { |
579a97f7 FB |
454 | struct target_sigaltstack *uss; |
455 | struct target_sigaltstack ss; | |
a04e134a | 456 | |
0da46a6e | 457 | ret = -TARGET_EFAULT; |
579a97f7 | 458 | if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1) |
a04e134a TS |
459 | || __get_user(ss.ss_sp, &uss->ss_sp) |
460 | || __get_user(ss.ss_size, &uss->ss_size) | |
461 | || __get_user(ss.ss_flags, &uss->ss_flags)) | |
462 | goto out; | |
579a97f7 | 463 | unlock_user_struct(uss, uss_addr, 0); |
a04e134a | 464 | |
0da46a6e | 465 | ret = -TARGET_EPERM; |
a04e134a TS |
466 | if (on_sig_stack(sp)) |
467 | goto out; | |
468 | ||
0da46a6e | 469 | ret = -TARGET_EINVAL; |
a04e134a TS |
470 | if (ss.ss_flags != TARGET_SS_DISABLE |
471 | && ss.ss_flags != TARGET_SS_ONSTACK | |
472 | && ss.ss_flags != 0) | |
473 | goto out; | |
474 | ||
475 | if (ss.ss_flags == TARGET_SS_DISABLE) { | |
476 | ss.ss_size = 0; | |
477 | ss.ss_sp = 0; | |
478 | } else { | |
0da46a6e | 479 | ret = -TARGET_ENOMEM; |
a04e134a TS |
480 | if (ss.ss_size < MINSIGSTKSZ) |
481 | goto out; | |
482 | } | |
483 | ||
484 | target_sigaltstack_used.ss_sp = ss.ss_sp; | |
485 | target_sigaltstack_used.ss_size = ss.ss_size; | |
486 | } | |
487 | ||
579a97f7 | 488 | if (uoss_addr) { |
0da46a6e | 489 | ret = -TARGET_EFAULT; |
579a97f7 | 490 | if (copy_to_user(uoss_addr, &oss, sizeof(oss))) |
a04e134a | 491 | goto out; |
a04e134a TS |
492 | } |
493 | ||
494 | ret = 0; | |
495 | out: | |
496 | return ret; | |
497 | } | |
498 | ||
0da46a6e | 499 | /* do_sigaction() return host values and errnos */ |
66fb9763 FB |
500 | int do_sigaction(int sig, const struct target_sigaction *act, |
501 | struct target_sigaction *oact) | |
502 | { | |
503 | struct emulated_sigaction *k; | |
773b93ee FB |
504 | struct sigaction act1; |
505 | int host_sig; | |
0da46a6e | 506 | int ret = 0; |
66fb9763 | 507 | |
0aeaa8ce | 508 | if (sig < 1 || sig > TARGET_NSIG || sig == SIGKILL || sig == SIGSTOP) |
66fb9763 FB |
509 | return -EINVAL; |
510 | k = &sigact_table[sig - 1]; | |
773b93ee | 511 | #if defined(DEBUG_SIGNAL) |
5fafdf24 | 512 | fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n", |
66fb9763 FB |
513 | sig, (int)act, (int)oact); |
514 | #endif | |
515 | if (oact) { | |
516 | oact->_sa_handler = tswapl(k->sa._sa_handler); | |
517 | oact->sa_flags = tswapl(k->sa.sa_flags); | |
388bb21a TS |
518 | #if !defined(TARGET_MIPS) |
519 | oact->sa_restorer = tswapl(k->sa.sa_restorer); | |
520 | #endif | |
66fb9763 FB |
521 | oact->sa_mask = k->sa.sa_mask; |
522 | } | |
523 | if (act) { | |
524 | k->sa._sa_handler = tswapl(act->_sa_handler); | |
525 | k->sa.sa_flags = tswapl(act->sa_flags); | |
388bb21a TS |
526 | #if !defined(TARGET_MIPS) |
527 | k->sa.sa_restorer = tswapl(act->sa_restorer); | |
528 | #endif | |
66fb9763 | 529 | k->sa.sa_mask = act->sa_mask; |
773b93ee FB |
530 | |
531 | /* we update the host linux signal state */ | |
532 | host_sig = target_to_host_signal(sig); | |
533 | if (host_sig != SIGSEGV && host_sig != SIGBUS) { | |
534 | sigfillset(&act1.sa_mask); | |
535 | act1.sa_flags = SA_SIGINFO; | |
536 | if (k->sa.sa_flags & TARGET_SA_RESTART) | |
537 | act1.sa_flags |= SA_RESTART; | |
538 | /* NOTE: it is important to update the host kernel signal | |
539 | ignore state to avoid getting unexpected interrupted | |
540 | syscalls */ | |
541 | if (k->sa._sa_handler == TARGET_SIG_IGN) { | |
542 | act1.sa_sigaction = (void *)SIG_IGN; | |
543 | } else if (k->sa._sa_handler == TARGET_SIG_DFL) { | |
544 | act1.sa_sigaction = (void *)SIG_DFL; | |
545 | } else { | |
546 | act1.sa_sigaction = host_signal_handler; | |
547 | } | |
0da46a6e | 548 | ret = sigaction(host_sig, &act1, NULL); |
773b93ee | 549 | } |
66fb9763 | 550 | } |
0da46a6e | 551 | return ret; |
66fb9763 FB |
552 | } |
553 | ||
43fff238 FB |
554 | #ifndef offsetof |
555 | #define offsetof(type, field) ((size_t) &((type *)0)->field) | |
556 | #endif | |
557 | ||
5fafdf24 | 558 | static inline int copy_siginfo_to_user(target_siginfo_t *tinfo, |
43fff238 FB |
559 | const target_siginfo_t *info) |
560 | { | |
561 | tswap_siginfo(tinfo, info); | |
562 | return 0; | |
563 | } | |
564 | ||
66fb9763 FB |
565 | #ifdef TARGET_I386 |
566 | ||
567 | /* from the Linux kernel */ | |
568 | ||
569 | struct target_fpreg { | |
570 | uint16_t significand[4]; | |
571 | uint16_t exponent; | |
572 | }; | |
573 | ||
574 | struct target_fpxreg { | |
575 | uint16_t significand[4]; | |
576 | uint16_t exponent; | |
577 | uint16_t padding[3]; | |
578 | }; | |
579 | ||
580 | struct target_xmmreg { | |
992f48a0 | 581 | abi_ulong element[4]; |
66fb9763 FB |
582 | }; |
583 | ||
584 | struct target_fpstate { | |
585 | /* Regular FPU environment */ | |
992f48a0 BS |
586 | abi_ulong cw; |
587 | abi_ulong sw; | |
588 | abi_ulong tag; | |
589 | abi_ulong ipoff; | |
590 | abi_ulong cssel; | |
591 | abi_ulong dataoff; | |
592 | abi_ulong datasel; | |
66fb9763 FB |
593 | struct target_fpreg _st[8]; |
594 | uint16_t status; | |
595 | uint16_t magic; /* 0xffff = regular FPU data only */ | |
596 | ||
597 | /* FXSR FPU environment */ | |
992f48a0 BS |
598 | abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */ |
599 | abi_ulong mxcsr; | |
600 | abi_ulong reserved; | |
66fb9763 FB |
601 | struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ |
602 | struct target_xmmreg _xmm[8]; | |
992f48a0 | 603 | abi_ulong padding[56]; |
66fb9763 FB |
604 | }; |
605 | ||
606 | #define X86_FXSR_MAGIC 0x0000 | |
607 | ||
608 | struct target_sigcontext { | |
609 | uint16_t gs, __gsh; | |
610 | uint16_t fs, __fsh; | |
611 | uint16_t es, __esh; | |
612 | uint16_t ds, __dsh; | |
992f48a0 BS |
613 | abi_ulong edi; |
614 | abi_ulong esi; | |
615 | abi_ulong ebp; | |
616 | abi_ulong esp; | |
617 | abi_ulong ebx; | |
618 | abi_ulong edx; | |
619 | abi_ulong ecx; | |
620 | abi_ulong eax; | |
621 | abi_ulong trapno; | |
622 | abi_ulong err; | |
623 | abi_ulong eip; | |
66fb9763 | 624 | uint16_t cs, __csh; |
992f48a0 BS |
625 | abi_ulong eflags; |
626 | abi_ulong esp_at_signal; | |
66fb9763 | 627 | uint16_t ss, __ssh; |
992f48a0 BS |
628 | abi_ulong fpstate; /* pointer */ |
629 | abi_ulong oldmask; | |
630 | abi_ulong cr2; | |
66fb9763 FB |
631 | }; |
632 | ||
66fb9763 | 633 | struct target_ucontext { |
992f48a0 BS |
634 | abi_ulong tuc_flags; |
635 | abi_ulong tuc_link; | |
b8076a74 FB |
636 | target_stack_t tuc_stack; |
637 | struct target_sigcontext tuc_mcontext; | |
638 | target_sigset_t tuc_sigmask; /* mask last for extensibility */ | |
66fb9763 FB |
639 | }; |
640 | ||
641 | struct sigframe | |
642 | { | |
992f48a0 | 643 | abi_ulong pretcode; |
66fb9763 FB |
644 | int sig; |
645 | struct target_sigcontext sc; | |
646 | struct target_fpstate fpstate; | |
992f48a0 | 647 | abi_ulong extramask[TARGET_NSIG_WORDS-1]; |
66fb9763 FB |
648 | char retcode[8]; |
649 | }; | |
650 | ||
651 | struct rt_sigframe | |
652 | { | |
992f48a0 | 653 | abi_ulong pretcode; |
66fb9763 | 654 | int sig; |
992f48a0 BS |
655 | abi_ulong pinfo; |
656 | abi_ulong puc; | |
66fb9763 FB |
657 | struct target_siginfo info; |
658 | struct target_ucontext uc; | |
659 | struct target_fpstate fpstate; | |
660 | char retcode[8]; | |
661 | }; | |
662 | ||
663 | /* | |
664 | * Set up a signal frame. | |
665 | */ | |
666 | ||
66fb9763 FB |
667 | /* XXX: save x87 state */ |
668 | static int | |
669 | setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate, | |
670 | CPUX86State *env, unsigned long mask) | |
671 | { | |
672 | int err = 0; | |
775b58d8 | 673 | uint16_t magic; |
66fb9763 | 674 | |
579a97f7 | 675 | /* already locked in setup_frame() */ |
a52c757c FB |
676 | err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs); |
677 | err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs); | |
678 | err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es); | |
679 | err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds); | |
66fb9763 FB |
680 | err |= __put_user(env->regs[R_EDI], &sc->edi); |
681 | err |= __put_user(env->regs[R_ESI], &sc->esi); | |
682 | err |= __put_user(env->regs[R_EBP], &sc->ebp); | |
683 | err |= __put_user(env->regs[R_ESP], &sc->esp); | |
684 | err |= __put_user(env->regs[R_EBX], &sc->ebx); | |
685 | err |= __put_user(env->regs[R_EDX], &sc->edx); | |
686 | err |= __put_user(env->regs[R_ECX], &sc->ecx); | |
687 | err |= __put_user(env->regs[R_EAX], &sc->eax); | |
66099dd9 FB |
688 | err |= __put_user(env->exception_index, &sc->trapno); |
689 | err |= __put_user(env->error_code, &sc->err); | |
66fb9763 | 690 | err |= __put_user(env->eip, &sc->eip); |
a52c757c | 691 | err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); |
66fb9763 FB |
692 | err |= __put_user(env->eflags, &sc->eflags); |
693 | err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal); | |
a52c757c | 694 | err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); |
ed2dcdf6 FB |
695 | |
696 | cpu_x86_fsave(env, (void *)fpstate, 1); | |
697 | fpstate->status = fpstate->sw; | |
775b58d8 FB |
698 | magic = 0xffff; |
699 | err |= __put_user(magic, &fpstate->magic); | |
ed2dcdf6 FB |
700 | err |= __put_user(fpstate, &sc->fpstate); |
701 | ||
66fb9763 FB |
702 | /* non-iBCS2 extensions.. */ |
703 | err |= __put_user(mask, &sc->oldmask); | |
a52c757c | 704 | err |= __put_user(env->cr[2], &sc->cr2); |
66fb9763 | 705 | return err; |
31e31b8a FB |
706 | } |
707 | ||
66fb9763 FB |
708 | /* |
709 | * Determine which stack to use.. | |
710 | */ | |
31e31b8a | 711 | |
579a97f7 | 712 | static inline abi_ulong |
66fb9763 | 713 | get_sigframe(struct emulated_sigaction *ka, CPUX86State *env, size_t frame_size) |
31e31b8a | 714 | { |
66fb9763 FB |
715 | unsigned long esp; |
716 | ||
717 | /* Default to using normal stack */ | |
718 | esp = env->regs[R_ESP]; | |
66fb9763 | 719 | /* This is the X/Open sanctioned signal stack switching. */ |
a04e134a TS |
720 | if (ka->sa.sa_flags & TARGET_SA_ONSTACK) { |
721 | if (sas_ss_flags(esp) == 0) | |
722 | esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; | |
723 | } | |
66fb9763 FB |
724 | |
725 | /* This is the legacy signal stack switching. */ | |
5fafdf24 | 726 | else |
a52c757c FB |
727 | if ((env->segs[R_SS].selector & 0xffff) != __USER_DS && |
728 | !(ka->sa.sa_flags & TARGET_SA_RESTORER) && | |
729 | ka->sa.sa_restorer) { | |
730 | esp = (unsigned long) ka->sa.sa_restorer; | |
731 | } | |
579a97f7 | 732 | return (esp - frame_size) & -8ul; |
66fb9763 FB |
733 | } |
734 | ||
579a97f7 | 735 | /* compare linux/arch/i386/kernel/signal.c:setup_frame() */ |
66fb9763 FB |
736 | static void setup_frame(int sig, struct emulated_sigaction *ka, |
737 | target_sigset_t *set, CPUX86State *env) | |
738 | { | |
579a97f7 | 739 | abi_ulong frame_addr; |
66fb9763 | 740 | struct sigframe *frame; |
9231944d | 741 | int i, err = 0; |
66fb9763 | 742 | |
579a97f7 | 743 | frame_addr = get_sigframe(ka, env, sizeof(*frame)); |
66fb9763 | 744 | |
579a97f7 | 745 | if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
66fb9763 | 746 | goto give_sigsegv; |
579a97f7 | 747 | |
66fb9763 FB |
748 | err |= __put_user((/*current->exec_domain |
749 | && current->exec_domain->signal_invmap | |
750 | && sig < 32 | |
751 | ? current->exec_domain->signal_invmap[sig] | |
752 | : */ sig), | |
753 | &frame->sig); | |
754 | if (err) | |
755 | goto give_sigsegv; | |
756 | ||
757 | setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0]); | |
758 | if (err) | |
759 | goto give_sigsegv; | |
760 | ||
9231944d FB |
761 | for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
762 | if (__put_user(set->sig[i], &frame->extramask[i - 1])) | |
763 | goto give_sigsegv; | |
764 | } | |
66fb9763 FB |
765 | |
766 | /* Set up to return from userspace. If provided, use a stub | |
767 | already in userspace. */ | |
768 | if (ka->sa.sa_flags & TARGET_SA_RESTORER) { | |
769 | err |= __put_user(ka->sa.sa_restorer, &frame->pretcode); | |
770 | } else { | |
775b58d8 | 771 | uint16_t val16; |
66fb9763 FB |
772 | err |= __put_user(frame->retcode, &frame->pretcode); |
773 | /* This is popl %eax ; movl $,%eax ; int $0x80 */ | |
775b58d8 FB |
774 | val16 = 0xb858; |
775 | err |= __put_user(val16, (uint16_t *)(frame->retcode+0)); | |
84409ddb JM |
776 | #if defined(TARGET_X86_64) |
777 | #warning "Fix this !" | |
778 | #else | |
66fb9763 | 779 | err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); |
84409ddb | 780 | #endif |
775b58d8 FB |
781 | val16 = 0x80cd; |
782 | err |= __put_user(val16, (uint16_t *)(frame->retcode+6)); | |
66fb9763 FB |
783 | } |
784 | ||
785 | if (err) | |
786 | goto give_sigsegv; | |
787 | ||
788 | /* Set up registers for signal handler */ | |
53a5960a | 789 | env->regs[R_ESP] = h2g(frame); |
66fb9763 FB |
790 | env->eip = (unsigned long) ka->sa._sa_handler; |
791 | ||
792 | cpu_x86_load_seg(env, R_DS, __USER_DS); | |
793 | cpu_x86_load_seg(env, R_ES, __USER_DS); | |
794 | cpu_x86_load_seg(env, R_SS, __USER_DS); | |
795 | cpu_x86_load_seg(env, R_CS, __USER_CS); | |
796 | env->eflags &= ~TF_MASK; | |
797 | ||
579a97f7 FB |
798 | unlock_user_struct(frame, frame_addr, 1); |
799 | ||
66fb9763 FB |
800 | return; |
801 | ||
802 | give_sigsegv: | |
579a97f7 | 803 | unlock_user_struct(frame, frame_addr, 1); |
66fb9763 FB |
804 | if (sig == TARGET_SIGSEGV) |
805 | ka->sa._sa_handler = TARGET_SIG_DFL; | |
806 | force_sig(TARGET_SIGSEGV /* , current */); | |
807 | } | |
808 | ||
579a97f7 | 809 | /* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */ |
5fafdf24 | 810 | static void setup_rt_frame(int sig, struct emulated_sigaction *ka, |
9de5e440 | 811 | target_siginfo_t *info, |
66fb9763 FB |
812 | target_sigset_t *set, CPUX86State *env) |
813 | { | |
579a97f7 | 814 | abi_ulong frame_addr; |
66fb9763 | 815 | struct rt_sigframe *frame; |
9231944d | 816 | int i, err = 0; |
66fb9763 | 817 | |
579a97f7 | 818 | frame_addr = get_sigframe(ka, env, sizeof(*frame)); |
66fb9763 | 819 | |
579a97f7 | 820 | if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
66fb9763 | 821 | goto give_sigsegv; |
66fb9763 FB |
822 | |
823 | err |= __put_user((/*current->exec_domain | |
824 | && current->exec_domain->signal_invmap | |
825 | && sig < 32 | |
826 | ? current->exec_domain->signal_invmap[sig] | |
827 | : */sig), | |
828 | &frame->sig); | |
992f48a0 BS |
829 | err |= __put_user((abi_ulong)&frame->info, &frame->pinfo); |
830 | err |= __put_user((abi_ulong)&frame->uc, &frame->puc); | |
66fb9763 FB |
831 | err |= copy_siginfo_to_user(&frame->info, info); |
832 | if (err) | |
833 | goto give_sigsegv; | |
31e31b8a | 834 | |
66fb9763 | 835 | /* Create the ucontext. */ |
b8076a74 FB |
836 | err |= __put_user(0, &frame->uc.tuc_flags); |
837 | err |= __put_user(0, &frame->uc.tuc_link); | |
a04e134a | 838 | err |= __put_user(target_sigaltstack_used.ss_sp, |
b8076a74 | 839 | &frame->uc.tuc_stack.ss_sp); |
a04e134a | 840 | err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)), |
b8076a74 | 841 | &frame->uc.tuc_stack.ss_flags); |
a04e134a | 842 | err |= __put_user(target_sigaltstack_used.ss_size, |
b8076a74 FB |
843 | &frame->uc.tuc_stack.ss_size); |
844 | err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, | |
66fb9763 | 845 | env, set->sig[0]); |
9231944d | 846 | for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
b8076a74 | 847 | if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) |
9231944d FB |
848 | goto give_sigsegv; |
849 | } | |
31e31b8a | 850 | |
66fb9763 FB |
851 | /* Set up to return from userspace. If provided, use a stub |
852 | already in userspace. */ | |
853 | if (ka->sa.sa_flags & TARGET_SA_RESTORER) { | |
854 | err |= __put_user(ka->sa.sa_restorer, &frame->pretcode); | |
855 | } else { | |
775b58d8 FB |
856 | uint16_t val16; |
857 | ||
66fb9763 FB |
858 | err |= __put_user(frame->retcode, &frame->pretcode); |
859 | /* This is movl $,%eax ; int $0x80 */ | |
775b58d8 | 860 | err |= __put_user(0xb8, (char *)(frame->retcode+0)); |
66fb9763 | 861 | err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); |
775b58d8 FB |
862 | val16 = 0x80cd; |
863 | err |= __put_user(val16, (uint16_t *)(frame->retcode+5)); | |
66fb9763 FB |
864 | } |
865 | ||
866 | if (err) | |
867 | goto give_sigsegv; | |
868 | ||
869 | /* Set up registers for signal handler */ | |
870 | env->regs[R_ESP] = (unsigned long) frame; | |
871 | env->eip = (unsigned long) ka->sa._sa_handler; | |
872 | ||
873 | cpu_x86_load_seg(env, R_DS, __USER_DS); | |
874 | cpu_x86_load_seg(env, R_ES, __USER_DS); | |
875 | cpu_x86_load_seg(env, R_SS, __USER_DS); | |
876 | cpu_x86_load_seg(env, R_CS, __USER_CS); | |
877 | env->eflags &= ~TF_MASK; | |
878 | ||
579a97f7 FB |
879 | unlock_user_struct(frame, frame_addr, 1); |
880 | ||
66fb9763 FB |
881 | return; |
882 | ||
883 | give_sigsegv: | |
579a97f7 | 884 | unlock_user_struct(frame, frame_addr, 1); |
66fb9763 FB |
885 | if (sig == TARGET_SIGSEGV) |
886 | ka->sa._sa_handler = TARGET_SIG_DFL; | |
887 | force_sig(TARGET_SIGSEGV /* , current */); | |
888 | } | |
889 | ||
890 | static int | |
891 | restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax) | |
892 | { | |
893 | unsigned int err = 0; | |
894 | ||
66fb9763 FB |
895 | cpu_x86_load_seg(env, R_GS, lduw(&sc->gs)); |
896 | cpu_x86_load_seg(env, R_FS, lduw(&sc->fs)); | |
897 | cpu_x86_load_seg(env, R_ES, lduw(&sc->es)); | |
898 | cpu_x86_load_seg(env, R_DS, lduw(&sc->ds)); | |
899 | ||
900 | env->regs[R_EDI] = ldl(&sc->edi); | |
901 | env->regs[R_ESI] = ldl(&sc->esi); | |
902 | env->regs[R_EBP] = ldl(&sc->ebp); | |
903 | env->regs[R_ESP] = ldl(&sc->esp); | |
904 | env->regs[R_EBX] = ldl(&sc->ebx); | |
905 | env->regs[R_EDX] = ldl(&sc->edx); | |
906 | env->regs[R_ECX] = ldl(&sc->ecx); | |
907 | env->eip = ldl(&sc->eip); | |
908 | ||
909 | cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3); | |
910 | cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3); | |
5fafdf24 | 911 | |
66fb9763 FB |
912 | { |
913 | unsigned int tmpflags; | |
914 | tmpflags = ldl(&sc->eflags); | |
915 | env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5); | |
916 | // regs->orig_eax = -1; /* disable syscall checks */ | |
917 | } | |
918 | ||
66fb9763 FB |
919 | { |
920 | struct _fpstate * buf; | |
ed2dcdf6 | 921 | buf = (void *)ldl(&sc->fpstate); |
66fb9763 | 922 | if (buf) { |
ed2dcdf6 | 923 | #if 0 |
66fb9763 FB |
924 | if (verify_area(VERIFY_READ, buf, sizeof(*buf))) |
925 | goto badframe; | |
ed2dcdf6 FB |
926 | #endif |
927 | cpu_x86_frstor(env, (void *)buf, 1); | |
66fb9763 FB |
928 | } |
929 | } | |
ed2dcdf6 | 930 | |
66fb9763 FB |
931 | *peax = ldl(&sc->eax); |
932 | return err; | |
933 | #if 0 | |
934 | badframe: | |
935 | return 1; | |
936 | #endif | |
937 | } | |
938 | ||
939 | long do_sigreturn(CPUX86State *env) | |
940 | { | |
579a97f7 FB |
941 | struct sigframe *frame; |
942 | abi_ulong frame_addr = env->regs[R_ESP] - 8; | |
66fb9763 FB |
943 | target_sigset_t target_set; |
944 | sigset_t set; | |
945 | int eax, i; | |
946 | ||
447db213 FB |
947 | #if defined(DEBUG_SIGNAL) |
948 | fprintf(stderr, "do_sigreturn\n"); | |
949 | #endif | |
579a97f7 FB |
950 | if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
951 | goto badframe; | |
66fb9763 | 952 | /* set blocked signals */ |
9231944d FB |
953 | if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
954 | goto badframe; | |
955 | for(i = 1; i < TARGET_NSIG_WORDS; i++) { | |
956 | if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) | |
957 | goto badframe; | |
958 | } | |
66fb9763 | 959 | |
9231944d | 960 | target_to_host_sigset_internal(&set, &target_set); |
66fb9763 | 961 | sigprocmask(SIG_SETMASK, &set, NULL); |
3b46e624 | 962 | |
66fb9763 FB |
963 | /* restore registers */ |
964 | if (restore_sigcontext(env, &frame->sc, &eax)) | |
965 | goto badframe; | |
579a97f7 | 966 | unlock_user_struct(frame, frame_addr, 0); |
66fb9763 FB |
967 | return eax; |
968 | ||
969 | badframe: | |
579a97f7 | 970 | unlock_user_struct(frame, frame_addr, 0); |
66fb9763 FB |
971 | force_sig(TARGET_SIGSEGV); |
972 | return 0; | |
973 | } | |
974 | ||
975 | long do_rt_sigreturn(CPUX86State *env) | |
976 | { | |
53a5960a | 977 | struct rt_sigframe *frame = (struct rt_sigframe *)g2h(env->regs[R_ESP] - 4); |
66fb9763 | 978 | sigset_t set; |
66fb9763 FB |
979 | int eax; |
980 | ||
981 | #if 0 | |
982 | if (verify_area(VERIFY_READ, frame, sizeof(*frame))) | |
983 | goto badframe; | |
984 | #endif | |
b8076a74 | 985 | target_to_host_sigset(&set, &frame->uc.tuc_sigmask); |
66fb9763 | 986 | sigprocmask(SIG_SETMASK, &set, NULL); |
5fafdf24 | 987 | |
b8076a74 | 988 | if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax)) |
66fb9763 FB |
989 | goto badframe; |
990 | ||
579a97f7 | 991 | if (do_sigaltstack(h2g(&frame->uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) |
66fb9763 | 992 | goto badframe; |
a04e134a | 993 | |
66fb9763 FB |
994 | return eax; |
995 | ||
996 | badframe: | |
997 | force_sig(TARGET_SIGSEGV); | |
998 | return 0; | |
999 | } | |
1000 | ||
43fff238 FB |
1001 | #elif defined(TARGET_ARM) |
1002 | ||
1003 | struct target_sigcontext { | |
992f48a0 BS |
1004 | abi_ulong trap_no; |
1005 | abi_ulong error_code; | |
1006 | abi_ulong oldmask; | |
1007 | abi_ulong arm_r0; | |
1008 | abi_ulong arm_r1; | |
1009 | abi_ulong arm_r2; | |
1010 | abi_ulong arm_r3; | |
1011 | abi_ulong arm_r4; | |
1012 | abi_ulong arm_r5; | |
1013 | abi_ulong arm_r6; | |
1014 | abi_ulong arm_r7; | |
1015 | abi_ulong arm_r8; | |
1016 | abi_ulong arm_r9; | |
1017 | abi_ulong arm_r10; | |
1018 | abi_ulong arm_fp; | |
1019 | abi_ulong arm_ip; | |
1020 | abi_ulong arm_sp; | |
1021 | abi_ulong arm_lr; | |
1022 | abi_ulong arm_pc; | |
1023 | abi_ulong arm_cpsr; | |
1024 | abi_ulong fault_address; | |
43fff238 FB |
1025 | }; |
1026 | ||
43fff238 | 1027 | struct target_ucontext { |
992f48a0 BS |
1028 | abi_ulong tuc_flags; |
1029 | abi_ulong tuc_link; | |
b8076a74 FB |
1030 | target_stack_t tuc_stack; |
1031 | struct target_sigcontext tuc_mcontext; | |
1032 | target_sigset_t tuc_sigmask; /* mask last for extensibility */ | |
43fff238 FB |
1033 | }; |
1034 | ||
1035 | struct sigframe | |
1036 | { | |
1037 | struct target_sigcontext sc; | |
992f48a0 BS |
1038 | abi_ulong extramask[TARGET_NSIG_WORDS-1]; |
1039 | abi_ulong retcode; | |
43fff238 FB |
1040 | }; |
1041 | ||
1042 | struct rt_sigframe | |
1043 | { | |
1044 | struct target_siginfo *pinfo; | |
1045 | void *puc; | |
1046 | struct target_siginfo info; | |
1047 | struct target_ucontext uc; | |
992f48a0 | 1048 | abi_ulong retcode; |
43fff238 FB |
1049 | }; |
1050 | ||
1051 | #define TARGET_CONFIG_CPU_32 1 | |
1052 | ||
1053 | /* | |
1054 | * For ARM syscalls, we encode the syscall number into the instruction. | |
1055 | */ | |
1056 | #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) | |
1057 | #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) | |
1058 | ||
1059 | /* | |
1060 | * For Thumb syscalls, we pass the syscall number via r7. We therefore | |
1061 | * need two 16-bit instructions. | |
1062 | */ | |
1063 | #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) | |
1064 | #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) | |
1065 | ||
992f48a0 | 1066 | static const abi_ulong retcodes[4] = { |
43fff238 FB |
1067 | SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, |
1068 | SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN | |
1069 | }; | |
1070 | ||
1071 | ||
1072 | #define __put_user_error(x,p,e) __put_user(x, p) | |
1073 | #define __get_user_error(x,p,e) __get_user(x, p) | |
1074 | ||
1075 | static inline int valid_user_regs(CPUState *regs) | |
1076 | { | |
1077 | return 1; | |
1078 | } | |
1079 | ||
1080 | static int | |
1081 | setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ | |
1082 | CPUState *env, unsigned long mask) | |
1083 | { | |
1084 | int err = 0; | |
1085 | ||
1086 | __put_user_error(env->regs[0], &sc->arm_r0, err); | |
1087 | __put_user_error(env->regs[1], &sc->arm_r1, err); | |
1088 | __put_user_error(env->regs[2], &sc->arm_r2, err); | |
1089 | __put_user_error(env->regs[3], &sc->arm_r3, err); | |
1090 | __put_user_error(env->regs[4], &sc->arm_r4, err); | |
1091 | __put_user_error(env->regs[5], &sc->arm_r5, err); | |
1092 | __put_user_error(env->regs[6], &sc->arm_r6, err); | |
1093 | __put_user_error(env->regs[7], &sc->arm_r7, err); | |
1094 | __put_user_error(env->regs[8], &sc->arm_r8, err); | |
1095 | __put_user_error(env->regs[9], &sc->arm_r9, err); | |
1096 | __put_user_error(env->regs[10], &sc->arm_r10, err); | |
1097 | __put_user_error(env->regs[11], &sc->arm_fp, err); | |
1098 | __put_user_error(env->regs[12], &sc->arm_ip, err); | |
1099 | __put_user_error(env->regs[13], &sc->arm_sp, err); | |
1100 | __put_user_error(env->regs[14], &sc->arm_lr, err); | |
1101 | __put_user_error(env->regs[15], &sc->arm_pc, err); | |
1102 | #ifdef TARGET_CONFIG_CPU_32 | |
b5ff1b31 | 1103 | __put_user_error(cpsr_read(env), &sc->arm_cpsr, err); |
43fff238 FB |
1104 | #endif |
1105 | ||
1106 | __put_user_error(/* current->thread.trap_no */ 0, &sc->trap_no, err); | |
1107 | __put_user_error(/* current->thread.error_code */ 0, &sc->error_code, err); | |
1108 | __put_user_error(/* current->thread.address */ 0, &sc->fault_address, err); | |
1109 | __put_user_error(mask, &sc->oldmask, err); | |
1110 | ||
1111 | return err; | |
1112 | } | |
1113 | ||
579a97f7 | 1114 | static inline abi_ulong |
43fff238 FB |
1115 | get_sigframe(struct emulated_sigaction *ka, CPUState *regs, int framesize) |
1116 | { | |
1117 | unsigned long sp = regs->regs[13]; | |
1118 | ||
43fff238 FB |
1119 | /* |
1120 | * This is the X/Open sanctioned signal stack switching. | |
1121 | */ | |
a04e134a TS |
1122 | if ((ka->sa.sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) |
1123 | sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; | |
43fff238 FB |
1124 | /* |
1125 | * ATPCS B01 mandates 8-byte alignment | |
1126 | */ | |
579a97f7 | 1127 | return (sp - framesize) & ~7; |
43fff238 FB |
1128 | } |
1129 | ||
1130 | static int | |
1131 | setup_return(CPUState *env, struct emulated_sigaction *ka, | |
992f48a0 | 1132 | abi_ulong *rc, void *frame, int usig) |
43fff238 | 1133 | { |
992f48a0 BS |
1134 | abi_ulong handler = (abi_ulong)ka->sa._sa_handler; |
1135 | abi_ulong retcode; | |
43fff238 FB |
1136 | int thumb = 0; |
1137 | #if defined(TARGET_CONFIG_CPU_32) | |
b5ff1b31 | 1138 | #if 0 |
992f48a0 | 1139 | abi_ulong cpsr = env->cpsr; |
43fff238 | 1140 | |
43fff238 FB |
1141 | /* |
1142 | * Maybe we need to deliver a 32-bit signal to a 26-bit task. | |
1143 | */ | |
1144 | if (ka->sa.sa_flags & SA_THIRTYTWO) | |
1145 | cpsr = (cpsr & ~MODE_MASK) | USR_MODE; | |
1146 | ||
1147 | #ifdef CONFIG_ARM_THUMB | |
1148 | if (elf_hwcap & HWCAP_THUMB) { | |
1149 | /* | |
1150 | * The LSB of the handler determines if we're going to | |
1151 | * be using THUMB or ARM mode for this signal handler. | |
1152 | */ | |
1153 | thumb = handler & 1; | |
1154 | ||
1155 | if (thumb) | |
1156 | cpsr |= T_BIT; | |
1157 | else | |
1158 | cpsr &= ~T_BIT; | |
1159 | } | |
a04e134a TS |
1160 | #endif /* CONFIG_ARM_THUMB */ |
1161 | #endif /* 0 */ | |
43fff238 FB |
1162 | #endif /* TARGET_CONFIG_CPU_32 */ |
1163 | ||
1164 | if (ka->sa.sa_flags & TARGET_SA_RESTORER) { | |
992f48a0 | 1165 | retcode = (abi_ulong)ka->sa.sa_restorer; |
43fff238 FB |
1166 | } else { |
1167 | unsigned int idx = thumb; | |
1168 | ||
1169 | if (ka->sa.sa_flags & TARGET_SA_SIGINFO) | |
1170 | idx += 2; | |
1171 | ||
1172 | if (__put_user(retcodes[idx], rc)) | |
1173 | return 1; | |
1174 | #if 0 | |
992f48a0 BS |
1175 | flush_icache_range((abi_ulong)rc, |
1176 | (abi_ulong)(rc + 1)); | |
43fff238 | 1177 | #endif |
992f48a0 | 1178 | retcode = ((abi_ulong)rc) + thumb; |
43fff238 FB |
1179 | } |
1180 | ||
1181 | env->regs[0] = usig; | |
53a5960a | 1182 | env->regs[13] = h2g(frame); |
43fff238 FB |
1183 | env->regs[14] = retcode; |
1184 | env->regs[15] = handler & (thumb ? ~1 : ~3); | |
1185 | ||
b5ff1b31 | 1186 | #if 0 |
43fff238 FB |
1187 | #ifdef TARGET_CONFIG_CPU_32 |
1188 | env->cpsr = cpsr; | |
b5ff1b31 | 1189 | #endif |
43fff238 FB |
1190 | #endif |
1191 | ||
1192 | return 0; | |
1193 | } | |
1194 | ||
579a97f7 | 1195 | /* compare linux/arch/arm/kernel/signal.c:setup_frame() */ |
43fff238 FB |
1196 | static void setup_frame(int usig, struct emulated_sigaction *ka, |
1197 | target_sigset_t *set, CPUState *regs) | |
1198 | { | |
579a97f7 FB |
1199 | struct sigframe *frame; |
1200 | abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); | |
9231944d | 1201 | int i, err = 0; |
43fff238 | 1202 | |
579a97f7 FB |
1203 | if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
1204 | return; | |
1205 | ||
43fff238 FB |
1206 | err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]); |
1207 | ||
9231944d FB |
1208 | for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1209 | if (__put_user(set->sig[i], &frame->extramask[i - 1])) | |
579a97f7 | 1210 | goto end; |
43fff238 FB |
1211 | } |
1212 | ||
1213 | if (err == 0) | |
1214 | err = setup_return(regs, ka, &frame->retcode, frame, usig); | |
579a97f7 FB |
1215 | |
1216 | end: | |
1217 | unlock_user_struct(frame, frame_addr, 1); | |
43fff238 FB |
1218 | // return err; |
1219 | } | |
1220 | ||
579a97f7 | 1221 | /* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */ |
5fafdf24 | 1222 | static void setup_rt_frame(int usig, struct emulated_sigaction *ka, |
43fff238 FB |
1223 | target_siginfo_t *info, |
1224 | target_sigset_t *set, CPUState *env) | |
1225 | { | |
579a97f7 FB |
1226 | struct rt_sigframe *frame; |
1227 | abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); | |
a04e134a | 1228 | struct target_sigaltstack stack; |
9231944d | 1229 | int i, err = 0; |
43fff238 | 1230 | |
579a97f7 | 1231 | if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
edf779ff FB |
1232 | return /* 1 */; |
1233 | ||
992f48a0 BS |
1234 | __put_user_error(&frame->info, (abi_ulong *)&frame->pinfo, err); |
1235 | __put_user_error(&frame->uc, (abi_ulong *)&frame->puc, err); | |
43fff238 FB |
1236 | err |= copy_siginfo_to_user(&frame->info, info); |
1237 | ||
1238 | /* Clear all the bits of the ucontext we don't use. */ | |
53a5960a | 1239 | memset(&frame->uc, 0, offsetof(struct target_ucontext, tuc_mcontext)); |
43fff238 | 1240 | |
a04e134a TS |
1241 | memset(&stack, 0, sizeof(stack)); |
1242 | __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); | |
1243 | __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); | |
1244 | __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); | |
775b58d8 | 1245 | memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack)); |
a04e134a | 1246 | |
b8076a74 | 1247 | err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/ |
43fff238 | 1248 | env, set->sig[0]); |
9231944d | 1249 | for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
b8076a74 | 1250 | if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) |
579a97f7 | 1251 | goto end; |
9231944d | 1252 | } |
43fff238 FB |
1253 | |
1254 | if (err == 0) | |
1255 | err = setup_return(env, ka, &frame->retcode, frame, usig); | |
1256 | ||
1257 | if (err == 0) { | |
1258 | /* | |
1259 | * For realtime signals we must also set the second and third | |
1260 | * arguments for the signal handler. | |
1261 | * -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06 | |
1262 | */ | |
992f48a0 BS |
1263 | env->regs[1] = (abi_ulong)frame->pinfo; |
1264 | env->regs[2] = (abi_ulong)frame->puc; | |
43fff238 FB |
1265 | } |
1266 | ||
579a97f7 FB |
1267 | end: |
1268 | unlock_user_struct(frame, frame_addr, 1); | |
1269 | ||
43fff238 FB |
1270 | // return err; |
1271 | } | |
1272 | ||
1273 | static int | |
1274 | restore_sigcontext(CPUState *env, struct target_sigcontext *sc) | |
1275 | { | |
1276 | int err = 0; | |
b5ff1b31 | 1277 | uint32_t cpsr; |
43fff238 FB |
1278 | |
1279 | __get_user_error(env->regs[0], &sc->arm_r0, err); | |
1280 | __get_user_error(env->regs[1], &sc->arm_r1, err); | |
1281 | __get_user_error(env->regs[2], &sc->arm_r2, err); | |
1282 | __get_user_error(env->regs[3], &sc->arm_r3, err); | |
1283 | __get_user_error(env->regs[4], &sc->arm_r4, err); | |
1284 | __get_user_error(env->regs[5], &sc->arm_r5, err); | |
1285 | __get_user_error(env->regs[6], &sc->arm_r6, err); | |
1286 | __get_user_error(env->regs[7], &sc->arm_r7, err); | |
1287 | __get_user_error(env->regs[8], &sc->arm_r8, err); | |
1288 | __get_user_error(env->regs[9], &sc->arm_r9, err); | |
1289 | __get_user_error(env->regs[10], &sc->arm_r10, err); | |
1290 | __get_user_error(env->regs[11], &sc->arm_fp, err); | |
1291 | __get_user_error(env->regs[12], &sc->arm_ip, err); | |
1292 | __get_user_error(env->regs[13], &sc->arm_sp, err); | |
1293 | __get_user_error(env->regs[14], &sc->arm_lr, err); | |
1294 | __get_user_error(env->regs[15], &sc->arm_pc, err); | |
1295 | #ifdef TARGET_CONFIG_CPU_32 | |
b5ff1b31 FB |
1296 | __get_user_error(cpsr, &sc->arm_cpsr, err); |
1297 | cpsr_write(env, cpsr, 0xffffffff); | |
43fff238 FB |
1298 | #endif |
1299 | ||
1300 | err |= !valid_user_regs(env); | |
1301 | ||
1302 | return err; | |
1303 | } | |
1304 | ||
1305 | long do_sigreturn(CPUState *env) | |
1306 | { | |
1307 | struct sigframe *frame; | |
1308 | target_sigset_t set; | |
1309 | sigset_t host_set; | |
9231944d | 1310 | int i; |
43fff238 FB |
1311 | |
1312 | /* | |
1313 | * Since we stacked the signal on a 64-bit boundary, | |
1314 | * then 'sp' should be word aligned here. If it's | |
1315 | * not, then the user is trying to mess with us. | |
1316 | */ | |
1317 | if (env->regs[13] & 7) | |
1318 | goto badframe; | |
1319 | ||
53a5960a | 1320 | frame = (struct sigframe *)g2h(env->regs[13]); |
43fff238 FB |
1321 | |
1322 | #if 0 | |
1323 | if (verify_area(VERIFY_READ, frame, sizeof (*frame))) | |
1324 | goto badframe; | |
1325 | #endif | |
9231944d FB |
1326 | if (__get_user(set.sig[0], &frame->sc.oldmask)) |
1327 | goto badframe; | |
1328 | for(i = 1; i < TARGET_NSIG_WORDS; i++) { | |
1329 | if (__get_user(set.sig[i], &frame->extramask[i - 1])) | |
1330 | goto badframe; | |
1331 | } | |
43fff238 | 1332 | |
9231944d | 1333 | target_to_host_sigset_internal(&host_set, &set); |
43fff238 FB |
1334 | sigprocmask(SIG_SETMASK, &host_set, NULL); |
1335 | ||
1336 | if (restore_sigcontext(env, &frame->sc)) | |
1337 | goto badframe; | |
1338 | ||
1339 | #if 0 | |
1340 | /* Send SIGTRAP if we're single-stepping */ | |
1341 | if (ptrace_cancel_bpt(current)) | |
1342 | send_sig(SIGTRAP, current, 1); | |
1343 | #endif | |
1344 | return env->regs[0]; | |
1345 | ||
1346 | badframe: | |
1347 | force_sig(SIGSEGV /* , current */); | |
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | long do_rt_sigreturn(CPUState *env) | |
1352 | { | |
1353 | struct rt_sigframe *frame; | |
43fff238 FB |
1354 | sigset_t host_set; |
1355 | ||
1356 | /* | |
1357 | * Since we stacked the signal on a 64-bit boundary, | |
1358 | * then 'sp' should be word aligned here. If it's | |
1359 | * not, then the user is trying to mess with us. | |
1360 | */ | |
1361 | if (env->regs[13] & 7) | |
1362 | goto badframe; | |
1363 | ||
1364 | frame = (struct rt_sigframe *)env->regs[13]; | |
1365 | ||
1366 | #if 0 | |
1367 | if (verify_area(VERIFY_READ, frame, sizeof (*frame))) | |
1368 | goto badframe; | |
1369 | #endif | |
b8076a74 | 1370 | target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); |
43fff238 FB |
1371 | sigprocmask(SIG_SETMASK, &host_set, NULL); |
1372 | ||
b8076a74 | 1373 | if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) |
43fff238 FB |
1374 | goto badframe; |
1375 | ||
579a97f7 | 1376 | if (do_sigaltstack(h2g(&frame->uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) |
a04e134a TS |
1377 | goto badframe; |
1378 | ||
43fff238 FB |
1379 | #if 0 |
1380 | /* Send SIGTRAP if we're single-stepping */ | |
1381 | if (ptrace_cancel_bpt(current)) | |
1382 | send_sig(SIGTRAP, current, 1); | |
1383 | #endif | |
1384 | return env->regs[0]; | |
1385 | ||
1386 | badframe: | |
1387 | force_sig(SIGSEGV /* , current */); | |
1388 | return 0; | |
1389 | } | |
1390 | ||
6d5e216d | 1391 | #elif defined(TARGET_SPARC) |
80a9d035 | 1392 | |
6d5e216d FB |
1393 | #define __SUNOS_MAXWIN 31 |
1394 | ||
1395 | /* This is what SunOS does, so shall I. */ | |
1396 | struct target_sigcontext { | |
992f48a0 | 1397 | abi_ulong sigc_onstack; /* state to restore */ |
6d5e216d | 1398 | |
992f48a0 BS |
1399 | abi_ulong sigc_mask; /* sigmask to restore */ |
1400 | abi_ulong sigc_sp; /* stack pointer */ | |
1401 | abi_ulong sigc_pc; /* program counter */ | |
1402 | abi_ulong sigc_npc; /* next program counter */ | |
1403 | abi_ulong sigc_psr; /* for condition codes etc */ | |
1404 | abi_ulong sigc_g1; /* User uses these two registers */ | |
1405 | abi_ulong sigc_o0; /* within the trampoline code. */ | |
6d5e216d FB |
1406 | |
1407 | /* Now comes information regarding the users window set | |
1408 | * at the time of the signal. | |
1409 | */ | |
992f48a0 | 1410 | abi_ulong sigc_oswins; /* outstanding windows */ |
6d5e216d FB |
1411 | |
1412 | /* stack ptrs for each regwin buf */ | |
1413 | char *sigc_spbuf[__SUNOS_MAXWIN]; | |
1414 | ||
1415 | /* Windows to restore after signal */ | |
1416 | struct { | |
992f48a0 BS |
1417 | abi_ulong locals[8]; |
1418 | abi_ulong ins[8]; | |
6d5e216d FB |
1419 | } sigc_wbuf[__SUNOS_MAXWIN]; |
1420 | }; | |
1421 | /* A Sparc stack frame */ | |
1422 | struct sparc_stackf { | |
992f48a0 BS |
1423 | abi_ulong locals[8]; |
1424 | abi_ulong ins[6]; | |
6d5e216d | 1425 | struct sparc_stackf *fp; |
992f48a0 | 1426 | abi_ulong callers_pc; |
6d5e216d | 1427 | char *structptr; |
992f48a0 BS |
1428 | abi_ulong xargs[6]; |
1429 | abi_ulong xxargs[1]; | |
6d5e216d FB |
1430 | }; |
1431 | ||
1432 | typedef struct { | |
1433 | struct { | |
992f48a0 BS |
1434 | abi_ulong psr; |
1435 | abi_ulong pc; | |
1436 | abi_ulong npc; | |
1437 | abi_ulong y; | |
1438 | abi_ulong u_regs[16]; /* globals and ins */ | |
6d5e216d FB |
1439 | } si_regs; |
1440 | int si_mask; | |
1441 | } __siginfo_t; | |
1442 | ||
1443 | typedef struct { | |
1444 | unsigned long si_float_regs [32]; | |
1445 | unsigned long si_fsr; | |
1446 | unsigned long si_fpqdepth; | |
1447 | struct { | |
1448 | unsigned long *insn_addr; | |
1449 | unsigned long insn; | |
1450 | } si_fpqueue [16]; | |
74ccb34e | 1451 | } qemu_siginfo_fpu_t; |
6d5e216d FB |
1452 | |
1453 | ||
1454 | struct target_signal_frame { | |
1455 | struct sparc_stackf ss; | |
1456 | __siginfo_t info; | |
74ccb34e | 1457 | qemu_siginfo_fpu_t *fpu_save; |
992f48a0 BS |
1458 | abi_ulong insns[2] __attribute__ ((aligned (8))); |
1459 | abi_ulong extramask[TARGET_NSIG_WORDS - 1]; | |
1460 | abi_ulong extra_size; /* Should be 0 */ | |
74ccb34e | 1461 | qemu_siginfo_fpu_t fpu_state; |
6d5e216d FB |
1462 | }; |
1463 | struct target_rt_signal_frame { | |
1464 | struct sparc_stackf ss; | |
1465 | siginfo_t info; | |
992f48a0 | 1466 | abi_ulong regs[20]; |
6d5e216d | 1467 | sigset_t mask; |
74ccb34e | 1468 | qemu_siginfo_fpu_t *fpu_save; |
6d5e216d FB |
1469 | unsigned int insns[2]; |
1470 | stack_t stack; | |
1471 | unsigned int extra_size; /* Should be 0 */ | |
74ccb34e | 1472 | qemu_siginfo_fpu_t fpu_state; |
6d5e216d FB |
1473 | }; |
1474 | ||
e80cfcfc FB |
1475 | #define UREG_O0 16 |
1476 | #define UREG_O6 22 | |
1477 | #define UREG_I0 0 | |
1478 | #define UREG_I1 1 | |
1479 | #define UREG_I2 2 | |
5bfb56b2 BS |
1480 | #define UREG_I3 3 |
1481 | #define UREG_I4 4 | |
1482 | #define UREG_I5 5 | |
e80cfcfc FB |
1483 | #define UREG_I6 6 |
1484 | #define UREG_I7 7 | |
1485 | #define UREG_L0 8 | |
6d5e216d FB |
1486 | #define UREG_FP UREG_I6 |
1487 | #define UREG_SP UREG_O6 | |
1488 | ||
1489 | static inline void *get_sigframe(struct emulated_sigaction *sa, CPUState *env, unsigned long framesize) | |
1490 | { | |
1491 | unsigned long sp; | |
1492 | ||
1493 | sp = env->regwptr[UREG_FP]; | |
6d5e216d FB |
1494 | |
1495 | /* This is the X/Open sanctioned signal stack switching. */ | |
a04e134a TS |
1496 | if (sa->sa.sa_flags & TARGET_SA_ONSTACK) { |
1497 | if (!on_sig_stack(sp) | |
1498 | && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7)) | |
1499 | sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; | |
6d5e216d | 1500 | } |
53a5960a | 1501 | return g2h(sp - framesize); |
6d5e216d FB |
1502 | } |
1503 | ||
1504 | static int | |
992f48a0 | 1505 | setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask) |
6d5e216d FB |
1506 | { |
1507 | int err = 0, i; | |
1508 | ||
6d5e216d | 1509 | err |= __put_user(env->psr, &si->si_regs.psr); |
6d5e216d FB |
1510 | err |= __put_user(env->pc, &si->si_regs.pc); |
1511 | err |= __put_user(env->npc, &si->si_regs.npc); | |
1512 | err |= __put_user(env->y, &si->si_regs.y); | |
a315a145 | 1513 | for (i=0; i < 8; i++) { |
6d5e216d FB |
1514 | err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]); |
1515 | } | |
a315a145 | 1516 | for (i=0; i < 8; i++) { |
e80cfcfc | 1517 | err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]); |
6d5e216d | 1518 | } |
6d5e216d FB |
1519 | err |= __put_user(mask, &si->si_mask); |
1520 | return err; | |
1521 | } | |
e80cfcfc | 1522 | |
80a9d035 | 1523 | #if 0 |
6d5e216d FB |
1524 | static int |
1525 | setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ | |
1526 | CPUState *env, unsigned long mask) | |
1527 | { | |
1528 | int err = 0; | |
1529 | ||
1530 | err |= __put_user(mask, &sc->sigc_mask); | |
1531 | err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp); | |
1532 | err |= __put_user(env->pc, &sc->sigc_pc); | |
1533 | err |= __put_user(env->npc, &sc->sigc_npc); | |
1534 | err |= __put_user(env->psr, &sc->sigc_psr); | |
1535 | err |= __put_user(env->gregs[1], &sc->sigc_g1); | |
1536 | err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0); | |
1537 | ||
1538 | return err; | |
1539 | } | |
80a9d035 | 1540 | #endif |
6d5e216d FB |
1541 | #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) |
1542 | ||
1543 | static void setup_frame(int sig, struct emulated_sigaction *ka, | |
1544 | target_sigset_t *set, CPUState *env) | |
1545 | { | |
1546 | struct target_signal_frame *sf; | |
1547 | int sigframe_size, err, i; | |
1548 | ||
1549 | /* 1. Make sure everything is clean */ | |
1550 | //synchronize_user_stack(); | |
1551 | ||
1552 | sigframe_size = NF_ALIGNEDSZ; | |
1553 | ||
1554 | sf = (struct target_signal_frame *) | |
1555 | get_sigframe(ka, env, sigframe_size); | |
1556 | ||
e80cfcfc | 1557 | //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]); |
6d5e216d FB |
1558 | #if 0 |
1559 | if (invalid_frame_pointer(sf, sigframe_size)) | |
1560 | goto sigill_and_return; | |
1561 | #endif | |
1562 | /* 2. Save the current process state */ | |
1563 | err = setup___siginfo(&sf->info, env, set->sig[0]); | |
1564 | err |= __put_user(0, &sf->extra_size); | |
1565 | ||
1566 | //err |= save_fpu_state(regs, &sf->fpu_state); | |
1567 | //err |= __put_user(&sf->fpu_state, &sf->fpu_save); | |
1568 | ||
1569 | err |= __put_user(set->sig[0], &sf->info.si_mask); | |
1570 | for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { | |
1571 | err |= __put_user(set->sig[i + 1], &sf->extramask[i]); | |
1572 | } | |
1573 | ||
a315a145 | 1574 | for (i = 0; i < 8; i++) { |
e80cfcfc | 1575 | err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); |
6d5e216d | 1576 | } |
a315a145 | 1577 | for (i = 0; i < 8; i++) { |
e80cfcfc | 1578 | err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); |
6d5e216d | 1579 | } |
6d5e216d FB |
1580 | if (err) |
1581 | goto sigsegv; | |
1582 | ||
1583 | /* 3. signal handler back-trampoline and parameters */ | |
53a5960a | 1584 | env->regwptr[UREG_FP] = h2g(sf); |
6d5e216d | 1585 | env->regwptr[UREG_I0] = sig; |
53a5960a PB |
1586 | env->regwptr[UREG_I1] = h2g(&sf->info); |
1587 | env->regwptr[UREG_I2] = h2g(&sf->info); | |
6d5e216d FB |
1588 | |
1589 | /* 4. signal handler */ | |
1590 | env->pc = (unsigned long) ka->sa._sa_handler; | |
1591 | env->npc = (env->pc + 4); | |
1592 | /* 5. return to kernel instructions */ | |
1593 | if (ka->sa.sa_restorer) | |
1594 | env->regwptr[UREG_I7] = (unsigned long)ka->sa.sa_restorer; | |
1595 | else { | |
775b58d8 | 1596 | uint32_t val32; |
53a5960a | 1597 | env->regwptr[UREG_I7] = h2g(&(sf->insns[0]) - 2); |
6d5e216d FB |
1598 | |
1599 | /* mov __NR_sigreturn, %g1 */ | |
775b58d8 FB |
1600 | val32 = 0x821020d8; |
1601 | err |= __put_user(val32, &sf->insns[0]); | |
6d5e216d FB |
1602 | |
1603 | /* t 0x10 */ | |
775b58d8 FB |
1604 | val32 = 0x91d02010; |
1605 | err |= __put_user(val32, &sf->insns[1]); | |
6d5e216d FB |
1606 | if (err) |
1607 | goto sigsegv; | |
1608 | ||
1609 | /* Flush instruction space. */ | |
1610 | //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0])); | |
80a9d035 | 1611 | // tb_flush(env); |
6d5e216d FB |
1612 | } |
1613 | return; | |
1614 | ||
80a9d035 | 1615 | //sigill_and_return: |
6d5e216d FB |
1616 | force_sig(TARGET_SIGILL); |
1617 | sigsegv: | |
e80cfcfc | 1618 | //fprintf(stderr, "force_sig\n"); |
6d5e216d FB |
1619 | force_sig(TARGET_SIGSEGV); |
1620 | } | |
1621 | static inline int | |
74ccb34e | 1622 | restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu) |
6d5e216d FB |
1623 | { |
1624 | int err; | |
1625 | #if 0 | |
1626 | #ifdef CONFIG_SMP | |
1627 | if (current->flags & PF_USEDFPU) | |
1628 | regs->psr &= ~PSR_EF; | |
1629 | #else | |
1630 | if (current == last_task_used_math) { | |
1631 | last_task_used_math = 0; | |
1632 | regs->psr &= ~PSR_EF; | |
1633 | } | |
1634 | #endif | |
1635 | current->used_math = 1; | |
1636 | current->flags &= ~PF_USEDFPU; | |
1637 | #endif | |
1638 | #if 0 | |
1639 | if (verify_area (VERIFY_READ, fpu, sizeof(*fpu))) | |
1640 | return -EFAULT; | |
1641 | #endif | |
1642 | ||
fafffaef FB |
1643 | #if 0 |
1644 | /* XXX: incorrect */ | |
6d5e216d FB |
1645 | err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0], |
1646 | (sizeof(unsigned long) * 32)); | |
fafffaef | 1647 | #endif |
6d5e216d FB |
1648 | err |= __get_user(env->fsr, &fpu->si_fsr); |
1649 | #if 0 | |
1650 | err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth); | |
1651 | if (current->thread.fpqdepth != 0) | |
1652 | err |= __copy_from_user(¤t->thread.fpqueue[0], | |
1653 | &fpu->si_fpqueue[0], | |
1654 | ((sizeof(unsigned long) + | |
1655 | (sizeof(unsigned long *)))*16)); | |
1656 | #endif | |
1657 | return err; | |
1658 | } | |
1659 | ||
1660 | ||
5fafdf24 | 1661 | static void setup_rt_frame(int sig, struct emulated_sigaction *ka, |
6d5e216d FB |
1662 | target_siginfo_t *info, |
1663 | target_sigset_t *set, CPUState *env) | |
1664 | { | |
1665 | fprintf(stderr, "setup_rt_frame: not implemented\n"); | |
1666 | } | |
1667 | ||
1668 | long do_sigreturn(CPUState *env) | |
1669 | { | |
1670 | struct target_signal_frame *sf; | |
e80cfcfc | 1671 | uint32_t up_psr, pc, npc; |
6d5e216d | 1672 | target_sigset_t set; |
e80cfcfc | 1673 | sigset_t host_set; |
992f48a0 | 1674 | abi_ulong fpu_save; |
e80cfcfc | 1675 | int err, i; |
6d5e216d | 1676 | |
53a5960a | 1677 | sf = (struct target_signal_frame *)g2h(env->regwptr[UREG_FP]); |
80a9d035 | 1678 | #if 0 |
e80cfcfc FB |
1679 | fprintf(stderr, "sigreturn\n"); |
1680 | fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]); | |
80a9d035 | 1681 | #endif |
e80cfcfc | 1682 | //cpu_dump_state(env, stderr, fprintf, 0); |
6d5e216d FB |
1683 | |
1684 | /* 1. Make sure we are not getting garbage from the user */ | |
1685 | #if 0 | |
1686 | if (verify_area (VERIFY_READ, sf, sizeof (*sf))) | |
1687 | goto segv_and_exit; | |
1688 | #endif | |
1689 | ||
1690 | if (((uint) sf) & 3) | |
1691 | goto segv_and_exit; | |
1692 | ||
1693 | err = __get_user(pc, &sf->info.si_regs.pc); | |
1694 | err |= __get_user(npc, &sf->info.si_regs.npc); | |
1695 | ||
6d5e216d FB |
1696 | if ((pc | npc) & 3) |
1697 | goto segv_and_exit; | |
1698 | ||
1699 | /* 2. Restore the state */ | |
e80cfcfc FB |
1700 | err |= __get_user(up_psr, &sf->info.si_regs.psr); |
1701 | ||
6d5e216d | 1702 | /* User can only change condition codes and FPU enabling in %psr. */ |
a315a145 FB |
1703 | env->psr = (up_psr & (PSR_ICC /* | PSR_EF */)) |
1704 | | (env->psr & ~(PSR_ICC /* | PSR_EF */)); | |
1705 | ||
1706 | env->pc = pc; | |
1707 | env->npc = npc; | |
e80cfcfc | 1708 | err |= __get_user(env->y, &sf->info.si_regs.y); |
a315a145 | 1709 | for (i=0; i < 8; i++) { |
e80cfcfc FB |
1710 | err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); |
1711 | } | |
a315a145 | 1712 | for (i=0; i < 8; i++) { |
e80cfcfc FB |
1713 | err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]); |
1714 | } | |
6d5e216d | 1715 | |
992f48a0 | 1716 | err |= __get_user(fpu_save, (abi_ulong *)&sf->fpu_save); |
6d5e216d | 1717 | |
e80cfcfc FB |
1718 | //if (fpu_save) |
1719 | // err |= restore_fpu_state(env, fpu_save); | |
6d5e216d FB |
1720 | |
1721 | /* This is pretty much atomic, no amount locking would prevent | |
1722 | * the races which exist anyways. | |
1723 | */ | |
1724 | err |= __get_user(set.sig[0], &sf->info.si_mask); | |
e80cfcfc FB |
1725 | for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1726 | err |= (__get_user(set.sig[i], &sf->extramask[i - 1])); | |
1727 | } | |
1728 | ||
1729 | target_to_host_sigset_internal(&host_set, &set); | |
1730 | sigprocmask(SIG_SETMASK, &host_set, NULL); | |
6d5e216d FB |
1731 | |
1732 | if (err) | |
1733 | goto segv_and_exit; | |
1734 | ||
6d5e216d FB |
1735 | return env->regwptr[0]; |
1736 | ||
1737 | segv_and_exit: | |
1738 | force_sig(TARGET_SIGSEGV); | |
1739 | } | |
1740 | ||
1741 | long do_rt_sigreturn(CPUState *env) | |
1742 | { | |
1743 | fprintf(stderr, "do_rt_sigreturn: not implemented\n"); | |
1744 | return -ENOSYS; | |
1745 | } | |
1746 | ||
5bfb56b2 BS |
1747 | #ifdef TARGET_SPARC64 |
1748 | #define MC_TSTATE 0 | |
1749 | #define MC_PC 1 | |
1750 | #define MC_NPC 2 | |
1751 | #define MC_Y 3 | |
1752 | #define MC_G1 4 | |
1753 | #define MC_G2 5 | |
1754 | #define MC_G3 6 | |
1755 | #define MC_G4 7 | |
1756 | #define MC_G5 8 | |
1757 | #define MC_G6 9 | |
1758 | #define MC_G7 10 | |
1759 | #define MC_O0 11 | |
1760 | #define MC_O1 12 | |
1761 | #define MC_O2 13 | |
1762 | #define MC_O3 14 | |
1763 | #define MC_O4 15 | |
1764 | #define MC_O5 16 | |
1765 | #define MC_O6 17 | |
1766 | #define MC_O7 18 | |
1767 | #define MC_NGREG 19 | |
1768 | ||
992f48a0 | 1769 | typedef abi_ulong target_mc_greg_t; |
5bfb56b2 BS |
1770 | typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG]; |
1771 | ||
1772 | struct target_mc_fq { | |
992f48a0 | 1773 | abi_ulong *mcfq_addr; |
5bfb56b2 BS |
1774 | uint32_t mcfq_insn; |
1775 | }; | |
1776 | ||
1777 | struct target_mc_fpu { | |
1778 | union { | |
1779 | uint32_t sregs[32]; | |
1780 | uint64_t dregs[32]; | |
1781 | //uint128_t qregs[16]; | |
1782 | } mcfpu_fregs; | |
992f48a0 BS |
1783 | abi_ulong mcfpu_fsr; |
1784 | abi_ulong mcfpu_fprs; | |
1785 | abi_ulong mcfpu_gsr; | |
5bfb56b2 BS |
1786 | struct target_mc_fq *mcfpu_fq; |
1787 | unsigned char mcfpu_qcnt; | |
1788 | unsigned char mcfpu_qentsz; | |
1789 | unsigned char mcfpu_enab; | |
1790 | }; | |
1791 | typedef struct target_mc_fpu target_mc_fpu_t; | |
1792 | ||
1793 | typedef struct { | |
1794 | target_mc_gregset_t mc_gregs; | |
1795 | target_mc_greg_t mc_fp; | |
1796 | target_mc_greg_t mc_i7; | |
1797 | target_mc_fpu_t mc_fpregs; | |
1798 | } target_mcontext_t; | |
1799 | ||
1800 | struct target_ucontext { | |
1801 | struct target_ucontext *uc_link; | |
992f48a0 | 1802 | abi_ulong uc_flags; |
5bfb56b2 BS |
1803 | target_sigset_t uc_sigmask; |
1804 | target_mcontext_t uc_mcontext; | |
1805 | }; | |
1806 | ||
1807 | /* A V9 register window */ | |
1808 | struct target_reg_window { | |
992f48a0 BS |
1809 | abi_ulong locals[8]; |
1810 | abi_ulong ins[8]; | |
5bfb56b2 BS |
1811 | }; |
1812 | ||
1813 | #define TARGET_STACK_BIAS 2047 | |
1814 | ||
1815 | /* {set, get}context() needed for 64-bit SparcLinux userland. */ | |
1816 | void sparc64_set_context(CPUSPARCState *env) | |
1817 | { | |
1818 | struct target_ucontext *ucp = (struct target_ucontext *) | |
1819 | env->regwptr[UREG_I0]; | |
1820 | target_mc_gregset_t *grp; | |
992f48a0 BS |
1821 | abi_ulong pc, npc, tstate; |
1822 | abi_ulong fp, i7; | |
5bfb56b2 BS |
1823 | unsigned char fenab; |
1824 | int err; | |
1825 | unsigned int i; | |
992f48a0 | 1826 | abi_ulong *src, *dst; |
5bfb56b2 BS |
1827 | |
1828 | grp = &ucp->uc_mcontext.mc_gregs; | |
579a97f7 FB |
1829 | err = __get_user(pc, &((*grp)[MC_PC])); |
1830 | err |= __get_user(npc, &((*grp)[MC_NPC])); | |
5bfb56b2 BS |
1831 | if (err || ((pc | npc) & 3)) |
1832 | goto do_sigsegv; | |
1833 | if (env->regwptr[UREG_I1]) { | |
1834 | target_sigset_t target_set; | |
1835 | sigset_t set; | |
1836 | ||
1837 | if (TARGET_NSIG_WORDS == 1) { | |
579a97f7 | 1838 | if (__get_user(target_set.sig[0], &ucp->uc_sigmask.sig[0])) |
5bfb56b2 BS |
1839 | goto do_sigsegv; |
1840 | } else { | |
1841 | src = &ucp->uc_sigmask; | |
1842 | dst = &target_set; | |
992f48a0 | 1843 | for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); |
5bfb56b2 | 1844 | i++, dst++, src++) |
579a97f7 | 1845 | err |= __get_user(dst, src); |
5bfb56b2 BS |
1846 | if (err) |
1847 | goto do_sigsegv; | |
1848 | } | |
1849 | target_to_host_sigset_internal(&set, &target_set); | |
1850 | sigprocmask(SIG_SETMASK, &set, NULL); | |
1851 | } | |
1852 | env->pc = pc; | |
1853 | env->npc = npc; | |
579a97f7 FB |
1854 | err |= __get_user(env->y, &((*grp)[MC_Y])); |
1855 | err |= __get_user(tstate, &((*grp)[MC_TSTATE])); | |
5bfb56b2 BS |
1856 | env->asi = (tstate >> 24) & 0xff; |
1857 | PUT_CCR(env, tstate >> 32); | |
1858 | PUT_CWP64(env, tstate & 0x1f); | |
579a97f7 FB |
1859 | err |= __get_user(env->gregs[1], (&(*grp)[MC_G1])); |
1860 | err |= __get_user(env->gregs[2], (&(*grp)[MC_G2])); | |
1861 | err |= __get_user(env->gregs[3], (&(*grp)[MC_G3])); | |
1862 | err |= __get_user(env->gregs[4], (&(*grp)[MC_G4])); | |
1863 | err |= __get_user(env->gregs[5], (&(*grp)[MC_G5])); | |
1864 | err |= __get_user(env->gregs[6], (&(*grp)[MC_G6])); | |
1865 | err |= __get_user(env->gregs[7], (&(*grp)[MC_G7])); | |
1866 | err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0])); | |
1867 | err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1])); | |
1868 | err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2])); | |
1869 | err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3])); | |
1870 | err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4])); | |
1871 | err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5])); | |
1872 | err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6])); | |
1873 | err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7])); | |
1874 | ||
1875 | err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp)); | |
1876 | err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7)); | |
1877 | err |= __put_user(fp, | |
1878 | (&(((struct target_reg_window *)(TARGET_STACK_BIAS+env->regwptr[UREG_I6]))->ins[6]))); | |
1879 | err |= __put_user(i7, | |
1880 | (&(((struct target_reg_window *)(TARGET_STACK_BIAS+env->regwptr[UREG_I6]))->ins[7]))); | |
1881 | ||
1882 | err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab)); | |
1883 | err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs)); | |
5bfb56b2 BS |
1884 | src = &(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs); |
1885 | dst = &env->fpr; | |
1886 | for (i = 0; i < 64; i++, dst++, src++) | |
579a97f7 FB |
1887 | err |= __get_user(dst, src); |
1888 | err |= __get_user(env->fsr, | |
1889 | &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr)); | |
1890 | err |= __get_user(env->gsr, | |
1891 | &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr)); | |
5bfb56b2 BS |
1892 | if (err) |
1893 | goto do_sigsegv; | |
1894 | ||
1895 | return; | |
1896 | do_sigsegv: | |
1897 | force_sig(SIGSEGV); | |
1898 | } | |
1899 | ||
1900 | void sparc64_get_context(CPUSPARCState *env) | |
1901 | { | |
1902 | struct target_ucontext *ucp = (struct target_ucontext *) | |
1903 | env->regwptr[UREG_I0]; | |
1904 | target_mc_gregset_t *grp; | |
1905 | target_mcontext_t *mcp; | |
992f48a0 | 1906 | abi_ulong fp, i7; |
5bfb56b2 BS |
1907 | int err; |
1908 | unsigned int i; | |
992f48a0 | 1909 | abi_ulong *src, *dst; |
5bfb56b2 BS |
1910 | target_sigset_t target_set; |
1911 | sigset_t set; | |
1912 | ||
1913 | mcp = &ucp->uc_mcontext; | |
1914 | grp = &mcp->mc_gregs; | |
1915 | ||
1916 | /* Skip over the trap instruction, first. */ | |
1917 | env->pc = env->npc; | |
1918 | env->npc += 4; | |
1919 | ||
1920 | err = 0; | |
1921 | ||
1922 | sigprocmask(0, NULL, &set); | |
1923 | host_to_target_sigset_internal(&target_set, &set); | |
1924 | if (TARGET_NSIG_WORDS == 1) | |
579a97f7 FB |
1925 | err |= __put_user(target_set.sig[0], |
1926 | (abi_ulong *)&ucp->uc_sigmask); | |
5bfb56b2 BS |
1927 | else { |
1928 | src = &target_set; | |
1929 | dst = &ucp->uc_sigmask; | |
992f48a0 | 1930 | for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); |
5bfb56b2 | 1931 | i++, dst++, src++) |
579a97f7 | 1932 | err |= __put_user(src, dst); |
5bfb56b2 BS |
1933 | if (err) |
1934 | goto do_sigsegv; | |
1935 | } | |
1936 | ||
579a97f7 FB |
1937 | err |= __put_user(env->tstate, &((*grp)[MC_TSTATE])); |
1938 | err |= __put_user(env->pc, &((*grp)[MC_PC])); | |
1939 | err |= __put_user(env->npc, &((*grp)[MC_NPC])); | |
1940 | err |= __put_user(env->y, &((*grp)[MC_Y])); | |
1941 | err |= __put_user(env->gregs[1], &((*grp)[MC_G1])); | |
1942 | err |= __put_user(env->gregs[2], &((*grp)[MC_G2])); | |
1943 | err |= __put_user(env->gregs[3], &((*grp)[MC_G3])); | |
1944 | err |= __put_user(env->gregs[4], &((*grp)[MC_G4])); | |
1945 | err |= __put_user(env->gregs[5], &((*grp)[MC_G5])); | |
1946 | err |= __put_user(env->gregs[6], &((*grp)[MC_G6])); | |
1947 | err |= __put_user(env->gregs[7], &((*grp)[MC_G7])); | |
1948 | err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0])); | |
1949 | err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1])); | |
1950 | err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2])); | |
1951 | err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3])); | |
1952 | err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4])); | |
1953 | err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5])); | |
1954 | err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6])); | |
1955 | err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7])); | |
1956 | ||
1957 | err |= __get_user(fp, | |
1958 | (&(((struct target_reg_window *)(TARGET_STACK_BIAS+env->regwptr[UREG_I6]))->ins[6]))); | |
1959 | err |= __get_user(i7, | |
1960 | (&(((struct target_reg_window *)(TARGET_STACK_BIAS+env->regwptr[UREG_I6]))->ins[7]))); | |
1961 | err |= __put_user(fp, &(mcp->mc_fp)); | |
1962 | err |= __put_user(i7, &(mcp->mc_i7)); | |
5bfb56b2 BS |
1963 | |
1964 | src = &env->fpr; | |
1965 | dst = &(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs); | |
1966 | for (i = 0; i < 64; i++, dst++, src++) | |
579a97f7 FB |
1967 | err |= __put_user(src, dst); |
1968 | err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr)); | |
1969 | err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr)); | |
1970 | err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs)); | |
5bfb56b2 BS |
1971 | |
1972 | if (err) | |
1973 | goto do_sigsegv; | |
1974 | ||
1975 | return; | |
1976 | do_sigsegv: | |
1977 | force_sig(SIGSEGV); | |
1978 | } | |
1979 | #endif | |
d26bc211 | 1980 | #elif defined(TARGET_ABI_MIPSN64) |
540635ba TS |
1981 | |
1982 | # warning signal handling not implemented | |
1983 | ||
1984 | static void setup_frame(int sig, struct emulated_sigaction *ka, | |
1985 | target_sigset_t *set, CPUState *env) | |
1986 | { | |
1987 | fprintf(stderr, "setup_frame: not implemented\n"); | |
1988 | } | |
1989 | ||
1990 | static void setup_rt_frame(int sig, struct emulated_sigaction *ka, | |
1991 | target_siginfo_t *info, | |
1992 | target_sigset_t *set, CPUState *env) | |
1993 | { | |
1994 | fprintf(stderr, "setup_rt_frame: not implemented\n"); | |
1995 | } | |
1996 | ||
1997 | long do_sigreturn(CPUState *env) | |
1998 | { | |
1999 | fprintf(stderr, "do_sigreturn: not implemented\n"); | |
2000 | return -ENOSYS; | |
2001 | } | |
2002 | ||
2003 | long do_rt_sigreturn(CPUState *env) | |
2004 | { | |
2005 | fprintf(stderr, "do_rt_sigreturn: not implemented\n"); | |
2006 | return -ENOSYS; | |
2007 | } | |
2008 | ||
d26bc211 | 2009 | #elif defined(TARGET_ABI_MIPSN32) |
540635ba TS |
2010 | |
2011 | # warning signal handling not implemented | |
2012 | ||
2013 | static void setup_frame(int sig, struct emulated_sigaction *ka, | |
2014 | target_sigset_t *set, CPUState *env) | |
2015 | { | |
2016 | fprintf(stderr, "setup_frame: not implemented\n"); | |
2017 | } | |
2018 | ||
2019 | static void setup_rt_frame(int sig, struct emulated_sigaction *ka, | |
2020 | target_siginfo_t *info, | |
2021 | target_sigset_t *set, CPUState *env) | |
2022 | { | |
2023 | fprintf(stderr, "setup_rt_frame: not implemented\n"); | |
2024 | } | |
2025 | ||
2026 | long do_sigreturn(CPUState *env) | |
2027 | { | |
2028 | fprintf(stderr, "do_sigreturn: not implemented\n"); | |
2029 | return -ENOSYS; | |
2030 | } | |
2031 | ||
2032 | long do_rt_sigreturn(CPUState *env) | |
2033 | { | |
2034 | fprintf(stderr, "do_rt_sigreturn: not implemented\n"); | |
2035 | return -ENOSYS; | |
2036 | } | |
2037 | ||
d26bc211 | 2038 | #elif defined(TARGET_ABI_MIPSO32) |
106ec879 FB |
2039 | |
2040 | struct target_sigcontext { | |
2041 | uint32_t sc_regmask; /* Unused */ | |
2042 | uint32_t sc_status; | |
2043 | uint64_t sc_pc; | |
2044 | uint64_t sc_regs[32]; | |
2045 | uint64_t sc_fpregs[32]; | |
2046 | uint32_t sc_ownedfp; /* Unused */ | |
2047 | uint32_t sc_fpc_csr; | |
2048 | uint32_t sc_fpc_eir; /* Unused */ | |
2049 | uint32_t sc_used_math; | |
2050 | uint32_t sc_dsp; /* dsp status, was sc_ssflags */ | |
2051 | uint64_t sc_mdhi; | |
2052 | uint64_t sc_mdlo; | |
2053 | target_ulong sc_hi1; /* Was sc_cause */ | |
2054 | target_ulong sc_lo1; /* Was sc_badvaddr */ | |
2055 | target_ulong sc_hi2; /* Was sc_sigset[4] */ | |
2056 | target_ulong sc_lo2; | |
2057 | target_ulong sc_hi3; | |
2058 | target_ulong sc_lo3; | |
2059 | }; | |
2060 | ||
2061 | struct sigframe { | |
2062 | uint32_t sf_ass[4]; /* argument save space for o32 */ | |
2063 | uint32_t sf_code[2]; /* signal trampoline */ | |
2064 | struct target_sigcontext sf_sc; | |
2065 | target_sigset_t sf_mask; | |
2066 | }; | |
2067 | ||
2068 | /* Install trampoline to jump back from signal handler */ | |
2069 | static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall) | |
2070 | { | |
2071 | int err; | |
2072 | ||
2073 | /* | |
2074 | * Set up the return code ... | |
2075 | * | |
2076 | * li v0, __NR__foo_sigreturn | |
2077 | * syscall | |
2078 | */ | |
2079 | ||
2080 | err = __put_user(0x24020000 + syscall, tramp + 0); | |
2081 | err |= __put_user(0x0000000c , tramp + 1); | |
2082 | /* flush_cache_sigtramp((unsigned long) tramp); */ | |
2083 | return err; | |
2084 | } | |
2085 | ||
2086 | static inline int | |
2087 | setup_sigcontext(CPUState *regs, struct target_sigcontext *sc) | |
2088 | { | |
2089 | int err = 0; | |
2090 | ||
ead9360e | 2091 | err |= __put_user(regs->PC[regs->current_tc], &sc->sc_pc); |
106ec879 | 2092 | |
ead9360e TS |
2093 | #define save_gp_reg(i) do { \ |
2094 | err |= __put_user(regs->gpr[i][regs->current_tc], &sc->sc_regs[i]); \ | |
106ec879 FB |
2095 | } while(0) |
2096 | __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2); | |
2097 | save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6); | |
2098 | save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10); | |
2099 | save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14); | |
2100 | save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18); | |
2101 | save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22); | |
2102 | save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26); | |
2103 | save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30); | |
2104 | save_gp_reg(31); | |
388bb21a | 2105 | #undef save_gp_reg |
106ec879 | 2106 | |
ead9360e TS |
2107 | err |= __put_user(regs->HI[0][regs->current_tc], &sc->sc_mdhi); |
2108 | err |= __put_user(regs->LO[0][regs->current_tc], &sc->sc_mdlo); | |
106ec879 FB |
2109 | |
2110 | /* Not used yet, but might be useful if we ever have DSP suppport */ | |
2111 | #if 0 | |
2112 | if (cpu_has_dsp) { | |
2113 | err |= __put_user(mfhi1(), &sc->sc_hi1); | |
2114 | err |= __put_user(mflo1(), &sc->sc_lo1); | |
2115 | err |= __put_user(mfhi2(), &sc->sc_hi2); | |
2116 | err |= __put_user(mflo2(), &sc->sc_lo2); | |
2117 | err |= __put_user(mfhi3(), &sc->sc_hi3); | |
2118 | err |= __put_user(mflo3(), &sc->sc_lo3); | |
2119 | err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); | |
2120 | } | |
2121 | /* same with 64 bit */ | |
388bb21a | 2122 | #ifdef CONFIG_64BIT |
106ec879 FB |
2123 | err |= __put_user(regs->hi, &sc->sc_hi[0]); |
2124 | err |= __put_user(regs->lo, &sc->sc_lo[0]); | |
2125 | if (cpu_has_dsp) { | |
2126 | err |= __put_user(mfhi1(), &sc->sc_hi[1]); | |
2127 | err |= __put_user(mflo1(), &sc->sc_lo[1]); | |
2128 | err |= __put_user(mfhi2(), &sc->sc_hi[2]); | |
2129 | err |= __put_user(mflo2(), &sc->sc_lo[2]); | |
2130 | err |= __put_user(mfhi3(), &sc->sc_hi[3]); | |
2131 | err |= __put_user(mflo3(), &sc->sc_lo[3]); | |
2132 | err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); | |
2133 | } | |
388bb21a TS |
2134 | #endif |
2135 | #endif | |
106ec879 | 2136 | |
388bb21a | 2137 | #if 0 |
106ec879 FB |
2138 | err |= __put_user(!!used_math(), &sc->sc_used_math); |
2139 | ||
2140 | if (!used_math()) | |
2141 | goto out; | |
2142 | ||
2143 | /* | |
2144 | * Save FPU state to signal context. Signal handler will "inherit" | |
2145 | * current FPU state. | |
2146 | */ | |
2147 | preempt_disable(); | |
2148 | ||
2149 | if (!is_fpu_owner()) { | |
2150 | own_fpu(); | |
2151 | restore_fp(current); | |
2152 | } | |
2153 | err |= save_fp_context(sc); | |
2154 | ||
2155 | preempt_enable(); | |
2156 | out: | |
2157 | #endif | |
2158 | return err; | |
2159 | } | |
2160 | ||
2161 | static inline int | |
2162 | restore_sigcontext(CPUState *regs, struct target_sigcontext *sc) | |
2163 | { | |
2164 | int err = 0; | |
2165 | ||
2166 | err |= __get_user(regs->CP0_EPC, &sc->sc_pc); | |
2167 | ||
ead9360e TS |
2168 | err |= __get_user(regs->HI[0][regs->current_tc], &sc->sc_mdhi); |
2169 | err |= __get_user(regs->LO[0][regs->current_tc], &sc->sc_mdlo); | |
106ec879 | 2170 | |
ead9360e TS |
2171 | #define restore_gp_reg(i) do { \ |
2172 | err |= __get_user(regs->gpr[i][regs->current_tc], &sc->sc_regs[i]); \ | |
106ec879 FB |
2173 | } while(0) |
2174 | restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3); | |
2175 | restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6); | |
2176 | restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9); | |
2177 | restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12); | |
2178 | restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15); | |
2179 | restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18); | |
2180 | restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21); | |
2181 | restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24); | |
2182 | restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27); | |
2183 | restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30); | |
2184 | restore_gp_reg(31); | |
388bb21a | 2185 | #undef restore_gp_reg |
106ec879 FB |
2186 | |
2187 | #if 0 | |
2188 | if (cpu_has_dsp) { | |
2189 | err |= __get_user(treg, &sc->sc_hi1); mthi1(treg); | |
2190 | err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg); | |
2191 | err |= __get_user(treg, &sc->sc_hi2); mthi2(treg); | |
2192 | err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg); | |
2193 | err |= __get_user(treg, &sc->sc_hi3); mthi3(treg); | |
2194 | err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg); | |
2195 | err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); | |
2196 | } | |
388bb21a | 2197 | #ifdef CONFIG_64BIT |
106ec879 FB |
2198 | err |= __get_user(regs->hi, &sc->sc_hi[0]); |
2199 | err |= __get_user(regs->lo, &sc->sc_lo[0]); | |
2200 | if (cpu_has_dsp) { | |
2201 | err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg); | |
2202 | err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg); | |
2203 | err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg); | |
2204 | err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg); | |
2205 | err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg); | |
2206 | err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg); | |
2207 | err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); | |
2208 | } | |
388bb21a | 2209 | #endif |
106ec879 FB |
2210 | |
2211 | err |= __get_user(used_math, &sc->sc_used_math); | |
2212 | conditional_used_math(used_math); | |
2213 | ||
2214 | preempt_disable(); | |
2215 | ||
2216 | if (used_math()) { | |
2217 | /* restore fpu context if we have used it before */ | |
2218 | own_fpu(); | |
2219 | err |= restore_fp_context(sc); | |
2220 | } else { | |
2221 | /* signal handler may have used FPU. Give it up. */ | |
2222 | lose_fpu(); | |
2223 | } | |
2224 | ||
2225 | preempt_enable(); | |
2226 | #endif | |
2227 | return err; | |
2228 | } | |
2229 | /* | |
2230 | * Determine which stack to use.. | |
2231 | */ | |
579a97f7 | 2232 | static inline abi_ulong |
106ec879 FB |
2233 | get_sigframe(struct emulated_sigaction *ka, CPUState *regs, size_t frame_size) |
2234 | { | |
2235 | unsigned long sp; | |
2236 | ||
2237 | /* Default to using normal stack */ | |
ead9360e | 2238 | sp = regs->gpr[29][regs->current_tc]; |
106ec879 FB |
2239 | |
2240 | /* | |
2241 | * FPU emulator may have it's own trampoline active just | |
2242 | * above the user stack, 16-bytes before the next lowest | |
2243 | * 16 byte boundary. Try to avoid trashing it. | |
2244 | */ | |
2245 | sp -= 32; | |
2246 | ||
106ec879 | 2247 | /* This is the X/Open sanctioned signal stack switching. */ |
a04e134a TS |
2248 | if ((ka->sa.sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { |
2249 | sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; | |
2250 | } | |
106ec879 | 2251 | |
579a97f7 | 2252 | return (sp - frame_size) & ~7; |
106ec879 FB |
2253 | } |
2254 | ||
579a97f7 | 2255 | /* compare linux/arch/mips/kernel/signal.c:setup_frame() */ |
5fafdf24 | 2256 | static void setup_frame(int sig, struct emulated_sigaction * ka, |
579a97f7 | 2257 | target_sigset_t *set, CPUState *regs) |
106ec879 FB |
2258 | { |
2259 | struct sigframe *frame; | |
579a97f7 | 2260 | abi_ulong frame_addr; |
106ec879 FB |
2261 | int i; |
2262 | ||
579a97f7 FB |
2263 | frame_addr = get_sigframe(ka, regs, sizeof(*frame)); |
2264 | if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) | |
106ec879 FB |
2265 | goto give_sigsegv; |
2266 | ||
2267 | install_sigtramp(frame->sf_code, TARGET_NR_sigreturn); | |
2268 | ||
2269 | if(setup_sigcontext(regs, &frame->sf_sc)) | |
2270 | goto give_sigsegv; | |
2271 | ||
2272 | for(i = 0; i < TARGET_NSIG_WORDS; i++) { | |
2273 | if(__put_user(set->sig[i], &frame->sf_mask.sig[i])) | |
2274 | goto give_sigsegv; | |
2275 | } | |
2276 | ||
2277 | /* | |
2278 | * Arguments to signal handler: | |
2279 | * | |
2280 | * a0 = signal number | |
2281 | * a1 = 0 (should be cause) | |
2282 | * a2 = pointer to struct sigcontext | |
2283 | * | |
2284 | * $25 and PC point to the signal handler, $29 points to the | |
2285 | * struct sigframe. | |
2286 | */ | |
ead9360e TS |
2287 | regs->gpr[ 4][regs->current_tc] = sig; |
2288 | regs->gpr[ 5][regs->current_tc] = 0; | |
2289 | regs->gpr[ 6][regs->current_tc] = h2g(&frame->sf_sc); | |
2290 | regs->gpr[29][regs->current_tc] = h2g(frame); | |
2291 | regs->gpr[31][regs->current_tc] = h2g(frame->sf_code); | |
106ec879 FB |
2292 | /* The original kernel code sets CP0_EPC to the handler |
2293 | * since it returns to userland using eret | |
2294 | * we cannot do this here, and we must set PC directly */ | |
ead9360e | 2295 | regs->PC[regs->current_tc] = regs->gpr[25][regs->current_tc] = ka->sa._sa_handler; |
579a97f7 | 2296 | unlock_user_struct(frame, frame_addr, 1); |
106ec879 FB |
2297 | return; |
2298 | ||
2299 | give_sigsegv: | |
579a97f7 | 2300 | unlock_user_struct(frame, frame_addr, 1); |
106ec879 | 2301 | force_sig(TARGET_SIGSEGV/*, current*/); |
5fafdf24 | 2302 | return; |
106ec879 FB |
2303 | } |
2304 | ||
2305 | long do_sigreturn(CPUState *regs) | |
2306 | { | |
388bb21a | 2307 | struct sigframe *frame; |
579a97f7 | 2308 | abi_ulong frame_addr; |
388bb21a TS |
2309 | sigset_t blocked; |
2310 | target_sigset_t target_set; | |
2311 | int i; | |
106ec879 FB |
2312 | |
2313 | #if defined(DEBUG_SIGNAL) | |
388bb21a | 2314 | fprintf(stderr, "do_sigreturn\n"); |
106ec879 | 2315 | #endif |
579a97f7 FB |
2316 | frame_addr = regs->gpr[29][regs->current_tc]; |
2317 | if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) | |
106ec879 FB |
2318 | goto badframe; |
2319 | ||
388bb21a | 2320 | for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
106ec879 FB |
2321 | if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i])) |
2322 | goto badframe; | |
388bb21a | 2323 | } |
106ec879 | 2324 | |
388bb21a TS |
2325 | target_to_host_sigset_internal(&blocked, &target_set); |
2326 | sigprocmask(SIG_SETMASK, &blocked, NULL); | |
106ec879 | 2327 | |
388bb21a | 2328 | if (restore_sigcontext(regs, &frame->sf_sc)) |
106ec879 FB |
2329 | goto badframe; |
2330 | ||
2331 | #if 0 | |
388bb21a TS |
2332 | /* |
2333 | * Don't let your children do this ... | |
2334 | */ | |
2335 | __asm__ __volatile__( | |
106ec879 FB |
2336 | "move\t$29, %0\n\t" |
2337 | "j\tsyscall_exit" | |
2338 | :/* no outputs */ | |
2339 | :"r" (®s)); | |
388bb21a | 2340 | /* Unreached */ |
106ec879 | 2341 | #endif |
3b46e624 | 2342 | |
ead9360e | 2343 | regs->PC[regs->current_tc] = regs->CP0_EPC; |
388bb21a | 2344 | /* I am not sure this is right, but it seems to work |
106ec879 FB |
2345 | * maybe a problem with nested signals ? */ |
2346 | regs->CP0_EPC = 0; | |
2347 | return 0; | |
2348 | ||
2349 | badframe: | |
388bb21a TS |
2350 | force_sig(TARGET_SIGSEGV/*, current*/); |
2351 | return 0; | |
106ec879 FB |
2352 | } |
2353 | ||
5fafdf24 | 2354 | static void setup_rt_frame(int sig, struct emulated_sigaction *ka, |
106ec879 FB |
2355 | target_siginfo_t *info, |
2356 | target_sigset_t *set, CPUState *env) | |
2357 | { | |
2358 | fprintf(stderr, "setup_rt_frame: not implemented\n"); | |
2359 | } | |
2360 | ||
2361 | long do_rt_sigreturn(CPUState *env) | |
2362 | { | |
2363 | fprintf(stderr, "do_rt_sigreturn: not implemented\n"); | |
2364 | return -ENOSYS; | |
2365 | } | |
6d5e216d | 2366 | |
b346ff46 FB |
2367 | #else |
2368 | ||
2369 | static void setup_frame(int sig, struct emulated_sigaction *ka, | |
2370 | target_sigset_t *set, CPUState *env) | |
2371 | { | |
2372 | fprintf(stderr, "setup_frame: not implemented\n"); | |
2373 | } | |
2374 | ||
5fafdf24 | 2375 | static void setup_rt_frame(int sig, struct emulated_sigaction *ka, |
b346ff46 FB |
2376 | target_siginfo_t *info, |
2377 | target_sigset_t *set, CPUState *env) | |
2378 | { | |
2379 | fprintf(stderr, "setup_rt_frame: not implemented\n"); | |
2380 | } | |
2381 | ||
2382 | long do_sigreturn(CPUState *env) | |
2383 | { | |
2384 | fprintf(stderr, "do_sigreturn: not implemented\n"); | |
2385 | return -ENOSYS; | |
2386 | } | |
2387 | ||
2388 | long do_rt_sigreturn(CPUState *env) | |
2389 | { | |
2390 | fprintf(stderr, "do_rt_sigreturn: not implemented\n"); | |
2391 | return -ENOSYS; | |
2392 | } | |
2393 | ||
66fb9763 FB |
2394 | #endif |
2395 | ||
2396 | void process_pending_signals(void *cpu_env) | |
2397 | { | |
2398 | int sig; | |
992f48a0 | 2399 | abi_ulong handler; |
9de5e440 FB |
2400 | sigset_t set, old_set; |
2401 | target_sigset_t target_old_set; | |
66fb9763 FB |
2402 | struct emulated_sigaction *k; |
2403 | struct sigqueue *q; | |
3b46e624 | 2404 | |
31e31b8a FB |
2405 | if (!signal_pending) |
2406 | return; | |
2407 | ||
66fb9763 FB |
2408 | k = sigact_table; |
2409 | for(sig = 1; sig <= TARGET_NSIG; sig++) { | |
2410 | if (k->pending) | |
31e31b8a | 2411 | goto handle_signal; |
66fb9763 | 2412 | k++; |
31e31b8a FB |
2413 | } |
2414 | /* if no signal is pending, just return */ | |
2415 | signal_pending = 0; | |
2416 | return; | |
66fb9763 | 2417 | |
31e31b8a | 2418 | handle_signal: |
66fb9763 | 2419 | #ifdef DEBUG_SIGNAL |
bc8a22cc | 2420 | fprintf(stderr, "qemu: process signal %d\n", sig); |
66fb9763 FB |
2421 | #endif |
2422 | /* dequeue signal */ | |
2423 | q = k->first; | |
2424 | k->first = q->next; | |
2425 | if (!k->first) | |
2426 | k->pending = 0; | |
3b46e624 | 2427 | |
1fddef4b FB |
2428 | sig = gdb_handlesig (cpu_env, sig); |
2429 | if (!sig) { | |
2430 | fprintf (stderr, "Lost signal\n"); | |
2431 | abort(); | |
2432 | } | |
66fb9763 FB |
2433 | |
2434 | handler = k->sa._sa_handler; | |
2435 | if (handler == TARGET_SIG_DFL) { | |
2436 | /* default handler : ignore some signal. The other are fatal */ | |
5fafdf24 TS |
2437 | if (sig != TARGET_SIGCHLD && |
2438 | sig != TARGET_SIGURG && | |
66fb9763 FB |
2439 | sig != TARGET_SIGWINCH) { |
2440 | force_sig(sig); | |
2441 | } | |
2442 | } else if (handler == TARGET_SIG_IGN) { | |
2443 | /* ignore sig */ | |
2444 | } else if (handler == TARGET_SIG_ERR) { | |
2445 | force_sig(sig); | |
2446 | } else { | |
9de5e440 FB |
2447 | /* compute the blocked signals during the handler execution */ |
2448 | target_to_host_sigset(&set, &k->sa.sa_mask); | |
2449 | /* SA_NODEFER indicates that the current signal should not be | |
2450 | blocked during the handler */ | |
2451 | if (!(k->sa.sa_flags & TARGET_SA_NODEFER)) | |
2452 | sigaddset(&set, target_to_host_signal(sig)); | |
3b46e624 | 2453 | |
9de5e440 FB |
2454 | /* block signals in the handler using Linux */ |
2455 | sigprocmask(SIG_BLOCK, &set, &old_set); | |
2456 | /* save the previous blocked signal state to restore it at the | |
2457 | end of the signal execution (see do_sigreturn) */ | |
9231944d | 2458 | host_to_target_sigset_internal(&target_old_set, &old_set); |
9de5e440 | 2459 | |
bc8a22cc | 2460 | /* if the CPU is in VM86 mode, we restore the 32 bit values */ |
84409ddb | 2461 | #if defined(TARGET_I386) && !defined(TARGET_X86_64) |
bc8a22cc FB |
2462 | { |
2463 | CPUX86State *env = cpu_env; | |
2464 | if (env->eflags & VM_MASK) | |
2465 | save_v86_state(env); | |
2466 | } | |
2467 | #endif | |
9de5e440 | 2468 | /* prepare the stack frame of the virtual CPU */ |
66fb9763 | 2469 | if (k->sa.sa_flags & TARGET_SA_SIGINFO) |
9de5e440 | 2470 | setup_rt_frame(sig, k, &q->info, &target_old_set, cpu_env); |
66fb9763 | 2471 | else |
9de5e440 | 2472 | setup_frame(sig, k, &target_old_set, cpu_env); |
66fb9763 FB |
2473 | if (k->sa.sa_flags & TARGET_SA_RESETHAND) |
2474 | k->sa._sa_handler = TARGET_SIG_DFL; | |
31e31b8a | 2475 | } |
66fb9763 FB |
2476 | if (q != &k->info) |
2477 | free_sigqueue(q); | |
2478 | } |