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Commit | Line | Data |
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31e31b8a | 1 | /* |
66fb9763 | 2 | * Emulation of Linux signals |
31e31b8a FB |
3 | * |
4 | * Copyright (c) 2003 Fabrice Bellard | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | #include <stdlib.h> | |
21 | #include <stdio.h> | |
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 | ||
0d330196 FB |
29 | #ifdef __ia64__ |
30 | #undef uc_mcontext | |
31 | #undef uc_sigmask | |
32 | #undef uc_stack | |
33 | #undef uc_link | |
34 | #endif | |
35 | ||
3ef693a0 | 36 | #include "qemu.h" |
66fb9763 FB |
37 | |
38 | //#define DEBUG_SIGNAL | |
39 | ||
40 | #define MAX_SIGQUEUE_SIZE 1024 | |
41 | ||
42 | struct sigqueue { | |
43 | struct sigqueue *next; | |
9de5e440 | 44 | target_siginfo_t info; |
66fb9763 | 45 | }; |
31e31b8a FB |
46 | |
47 | struct emulated_sigaction { | |
48 | struct target_sigaction sa; | |
66fb9763 FB |
49 | int pending; /* true if signal is pending */ |
50 | struct sigqueue *first; | |
51 | struct sigqueue info; /* in order to always have memory for the | |
52 | first signal, we put it here */ | |
31e31b8a FB |
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 | |
66fb9763 FB |
60 | static void host_signal_handler(int host_signum, siginfo_t *info, |
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 | ||
31e31b8a FB |
102 | static inline int host_to_target_signal(int sig) |
103 | { | |
9e5f5284 | 104 | return host_to_target_signal_table[sig]; |
31e31b8a FB |
105 | } |
106 | ||
107 | static inline int target_to_host_signal(int sig) | |
108 | { | |
9e5f5284 | 109 | return target_to_host_signal_table[sig]; |
31e31b8a FB |
110 | } |
111 | ||
9231944d FB |
112 | static void host_to_target_sigset_internal(target_sigset_t *d, |
113 | const sigset_t *s) | |
66fb9763 FB |
114 | { |
115 | int i; | |
9e5f5284 FB |
116 | unsigned long sigmask; |
117 | uint32_t target_sigmask; | |
118 | ||
119 | sigmask = ((unsigned long *)s)[0]; | |
120 | target_sigmask = 0; | |
121 | for(i = 0; i < 32; i++) { | |
122 | if (sigmask & (1 << i)) | |
123 | target_sigmask |= 1 << (host_to_target_signal(i + 1) - 1); | |
124 | } | |
125 | #if TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 32 | |
9231944d | 126 | d->sig[0] = target_sigmask; |
9e5f5284 | 127 | for(i = 1;i < TARGET_NSIG_WORDS; i++) { |
9231944d | 128 | d->sig[i] = ((unsigned long *)s)[i]; |
66fb9763 | 129 | } |
9e5f5284 | 130 | #elif TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2 |
9231944d FB |
131 | d->sig[0] = target_sigmask; |
132 | d->sig[1] = sigmask >> 32; | |
9e5f5284 FB |
133 | #else |
134 | #error host_to_target_sigset | |
135 | #endif | |
66fb9763 FB |
136 | } |
137 | ||
9231944d FB |
138 | void host_to_target_sigset(target_sigset_t *d, const sigset_t *s) |
139 | { | |
140 | target_sigset_t d1; | |
141 | int i; | |
142 | ||
143 | host_to_target_sigset_internal(&d1, s); | |
144 | for(i = 0;i < TARGET_NSIG_WORDS; i++) | |
145 | __put_user(d1.sig[i], &d->sig[i]); | |
146 | } | |
147 | ||
148 | void target_to_host_sigset_internal(sigset_t *d, const target_sigset_t *s) | |
66fb9763 FB |
149 | { |
150 | int i; | |
9e5f5284 FB |
151 | unsigned long sigmask; |
152 | target_ulong target_sigmask; | |
153 | ||
9231944d | 154 | target_sigmask = s->sig[0]; |
9e5f5284 FB |
155 | sigmask = 0; |
156 | for(i = 0; i < 32; i++) { | |
157 | if (target_sigmask & (1 << i)) | |
158 | sigmask |= 1 << (target_to_host_signal(i + 1) - 1); | |
159 | } | |
160 | #if TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 32 | |
161 | ((unsigned long *)d)[0] = sigmask; | |
162 | for(i = 1;i < TARGET_NSIG_WORDS; i++) { | |
9231944d | 163 | ((unsigned long *)d)[i] = s->sig[i]; |
66fb9763 | 164 | } |
9e5f5284 | 165 | #elif TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2 |
9231944d | 166 | ((unsigned long *)d)[0] = sigmask | ((unsigned long)(s->sig[1]) << 32); |
9e5f5284 FB |
167 | #else |
168 | #error target_to_host_sigset | |
169 | #endif /* TARGET_LONG_BITS */ | |
66fb9763 FB |
170 | } |
171 | ||
9231944d FB |
172 | void target_to_host_sigset(sigset_t *d, const target_sigset_t *s) |
173 | { | |
174 | target_sigset_t s1; | |
175 | int i; | |
176 | ||
177 | for(i = 0;i < TARGET_NSIG_WORDS; i++) | |
178 | __get_user(s1.sig[i], &s->sig[i]); | |
179 | target_to_host_sigset_internal(d, &s1); | |
180 | } | |
181 | ||
66fb9763 FB |
182 | void host_to_target_old_sigset(target_ulong *old_sigset, |
183 | const sigset_t *sigset) | |
184 | { | |
9e5f5284 FB |
185 | target_sigset_t d; |
186 | host_to_target_sigset(&d, sigset); | |
187 | *old_sigset = d.sig[0]; | |
66fb9763 FB |
188 | } |
189 | ||
190 | void target_to_host_old_sigset(sigset_t *sigset, | |
191 | const target_ulong *old_sigset) | |
192 | { | |
9e5f5284 FB |
193 | target_sigset_t d; |
194 | int i; | |
195 | ||
196 | d.sig[0] = *old_sigset; | |
197 | for(i = 1;i < TARGET_NSIG_WORDS; i++) | |
198 | d.sig[i] = 0; | |
199 | target_to_host_sigset(sigset, &d); | |
66fb9763 FB |
200 | } |
201 | ||
9de5e440 FB |
202 | /* siginfo conversion */ |
203 | ||
204 | static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo, | |
205 | const siginfo_t *info) | |
66fb9763 | 206 | { |
9de5e440 FB |
207 | int sig; |
208 | sig = host_to_target_signal(info->si_signo); | |
209 | tinfo->si_signo = sig; | |
210 | tinfo->si_errno = 0; | |
211 | tinfo->si_code = 0; | |
447db213 FB |
212 | if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV || |
213 | sig == SIGBUS || sig == SIGTRAP) { | |
9de5e440 FB |
214 | /* should never come here, but who knows. The information for |
215 | the target is irrelevant */ | |
216 | tinfo->_sifields._sigfault._addr = 0; | |
217 | } else if (sig >= TARGET_SIGRTMIN) { | |
218 | tinfo->_sifields._rt._pid = info->si_pid; | |
219 | tinfo->_sifields._rt._uid = info->si_uid; | |
220 | /* XXX: potential problem if 64 bit */ | |
221 | tinfo->_sifields._rt._sigval.sival_ptr = | |
222 | (target_ulong)info->si_value.sival_ptr; | |
223 | } | |
224 | } | |
225 | ||
226 | static void tswap_siginfo(target_siginfo_t *tinfo, | |
227 | const target_siginfo_t *info) | |
228 | { | |
229 | int sig; | |
230 | sig = info->si_signo; | |
231 | tinfo->si_signo = tswap32(sig); | |
66fb9763 FB |
232 | tinfo->si_errno = tswap32(info->si_errno); |
233 | tinfo->si_code = tswap32(info->si_code); | |
447db213 FB |
234 | if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV || |
235 | sig == SIGBUS || sig == SIGTRAP) { | |
9de5e440 FB |
236 | tinfo->_sifields._sigfault._addr = |
237 | tswapl(info->_sifields._sigfault._addr); | |
238 | } else if (sig >= TARGET_SIGRTMIN) { | |
239 | tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid); | |
240 | tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid); | |
241 | tinfo->_sifields._rt._sigval.sival_ptr = | |
242 | tswapl(info->_sifields._rt._sigval.sival_ptr); | |
243 | } | |
244 | } | |
245 | ||
246 | ||
247 | void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info) | |
248 | { | |
249 | host_to_target_siginfo_noswap(tinfo, info); | |
250 | tswap_siginfo(tinfo, tinfo); | |
66fb9763 FB |
251 | } |
252 | ||
9de5e440 FB |
253 | /* XXX: we support only POSIX RT signals are used. */ |
254 | /* XXX: find a solution for 64 bit (additionnal malloced data is needed) */ | |
255 | void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo) | |
66fb9763 FB |
256 | { |
257 | info->si_signo = tswap32(tinfo->si_signo); | |
258 | info->si_errno = tswap32(tinfo->si_errno); | |
259 | info->si_code = tswap32(tinfo->si_code); | |
9de5e440 FB |
260 | info->si_pid = tswap32(tinfo->_sifields._rt._pid); |
261 | info->si_uid = tswap32(tinfo->_sifields._rt._uid); | |
262 | info->si_value.sival_ptr = | |
263 | (void *)tswapl(tinfo->_sifields._rt._sigval.sival_ptr); | |
66fb9763 FB |
264 | } |
265 | ||
31e31b8a FB |
266 | void signal_init(void) |
267 | { | |
268 | struct sigaction act; | |
9e5f5284 | 269 | int i, j; |
31e31b8a | 270 | |
9e5f5284 FB |
271 | /* generate signal conversion tables */ |
272 | for(i = 1; i <= 64; i++) { | |
273 | if (host_to_target_signal_table[i] == 0) | |
274 | host_to_target_signal_table[i] = i; | |
275 | } | |
276 | for(i = 1; i <= 64; i++) { | |
277 | j = host_to_target_signal_table[i]; | |
278 | target_to_host_signal_table[j] = i; | |
279 | } | |
280 | ||
9de5e440 FB |
281 | /* set all host signal handlers. ALL signals are blocked during |
282 | the handlers to serialize them. */ | |
283 | sigfillset(&act.sa_mask); | |
31e31b8a FB |
284 | act.sa_flags = SA_SIGINFO; |
285 | act.sa_sigaction = host_signal_handler; | |
286 | for(i = 1; i < NSIG; i++) { | |
c9087c2a | 287 | sigaction(i, &act, NULL); |
31e31b8a FB |
288 | } |
289 | ||
290 | memset(sigact_table, 0, sizeof(sigact_table)); | |
66fb9763 FB |
291 | |
292 | first_free = &sigqueue_table[0]; | |
293 | for(i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) | |
294 | sigqueue_table[i].next = &sigqueue_table[i + 1]; | |
295 | sigqueue_table[MAX_SIGQUEUE_SIZE - 1].next = NULL; | |
296 | } | |
297 | ||
298 | /* signal queue handling */ | |
299 | ||
300 | static inline struct sigqueue *alloc_sigqueue(void) | |
301 | { | |
302 | struct sigqueue *q = first_free; | |
303 | if (!q) | |
304 | return NULL; | |
305 | first_free = q->next; | |
306 | return q; | |
31e31b8a FB |
307 | } |
308 | ||
66fb9763 FB |
309 | static inline void free_sigqueue(struct sigqueue *q) |
310 | { | |
311 | q->next = first_free; | |
312 | first_free = q; | |
313 | } | |
314 | ||
9de5e440 FB |
315 | /* abort execution with signal */ |
316 | void __attribute((noreturn)) force_sig(int sig) | |
66fb9763 FB |
317 | { |
318 | int host_sig; | |
66fb9763 | 319 | host_sig = target_to_host_signal(sig); |
bc8a22cc | 320 | fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n", |
66fb9763 | 321 | sig, strsignal(host_sig)); |
9de5e440 | 322 | #if 1 |
66fb9763 | 323 | _exit(-host_sig); |
9de5e440 FB |
324 | #else |
325 | { | |
326 | struct sigaction act; | |
327 | sigemptyset(&act.sa_mask); | |
328 | act.sa_flags = SA_SIGINFO; | |
329 | act.sa_sigaction = SIG_DFL; | |
330 | sigaction(SIGABRT, &act, NULL); | |
331 | abort(); | |
332 | } | |
333 | #endif | |
66fb9763 FB |
334 | } |
335 | ||
9de5e440 FB |
336 | /* queue a signal so that it will be send to the virtual CPU as soon |
337 | as possible */ | |
338 | int queue_signal(int sig, target_siginfo_t *info) | |
31e31b8a | 339 | { |
66fb9763 | 340 | struct emulated_sigaction *k; |
9de5e440 | 341 | struct sigqueue *q, **pq; |
66fb9763 FB |
342 | target_ulong handler; |
343 | ||
9de5e440 | 344 | #if defined(DEBUG_SIGNAL) |
bc8a22cc | 345 | fprintf(stderr, "queue_signal: sig=%d\n", |
9de5e440 | 346 | sig); |
66fb9763 | 347 | #endif |
9de5e440 | 348 | k = &sigact_table[sig - 1]; |
66fb9763 FB |
349 | handler = k->sa._sa_handler; |
350 | if (handler == TARGET_SIG_DFL) { | |
351 | /* default handler : ignore some signal. The other are fatal */ | |
352 | if (sig != TARGET_SIGCHLD && | |
353 | sig != TARGET_SIGURG && | |
354 | sig != TARGET_SIGWINCH) { | |
355 | force_sig(sig); | |
9de5e440 FB |
356 | } else { |
357 | return 0; /* indicate ignored */ | |
66fb9763 FB |
358 | } |
359 | } else if (handler == TARGET_SIG_IGN) { | |
360 | /* ignore signal */ | |
9de5e440 | 361 | return 0; |
66fb9763 FB |
362 | } else if (handler == TARGET_SIG_ERR) { |
363 | force_sig(sig); | |
364 | } else { | |
9de5e440 FB |
365 | pq = &k->first; |
366 | if (sig < TARGET_SIGRTMIN) { | |
367 | /* if non real time signal, we queue exactly one signal */ | |
368 | if (!k->pending) | |
369 | q = &k->info; | |
370 | else | |
371 | return 0; | |
372 | } else { | |
373 | if (!k->pending) { | |
374 | /* first signal */ | |
375 | q = &k->info; | |
376 | } else { | |
377 | q = alloc_sigqueue(); | |
378 | if (!q) | |
379 | return -EAGAIN; | |
380 | while (*pq != NULL) | |
381 | pq = &(*pq)->next; | |
382 | } | |
383 | } | |
384 | *pq = q; | |
385 | q->info = *info; | |
386 | q->next = NULL; | |
387 | k->pending = 1; | |
388 | /* signal that a new signal is pending */ | |
389 | signal_pending = 1; | |
390 | return 1; /* indicates that the signal was queued */ | |
391 | } | |
392 | } | |
393 | ||
9de5e440 FB |
394 | static void host_signal_handler(int host_signum, siginfo_t *info, |
395 | void *puc) | |
396 | { | |
397 | int sig; | |
398 | target_siginfo_t tinfo; | |
399 | ||
400 | /* the CPU emulator uses some host signals to detect exceptions, | |
401 | we we forward to it some signals */ | |
58fe2f10 FB |
402 | if (host_signum == SIGSEGV || host_signum == SIGBUS |
403 | #if defined(TARGET_I386) && defined(USE_CODE_COPY) | |
404 | || host_signum == SIGFPE | |
405 | #endif | |
406 | ) { | |
b346ff46 | 407 | if (cpu_signal_handler(host_signum, info, puc)) |
9de5e440 FB |
408 | return; |
409 | } | |
410 | ||
411 | /* get target signal number */ | |
412 | sig = host_to_target_signal(host_signum); | |
413 | if (sig < 1 || sig > TARGET_NSIG) | |
414 | return; | |
415 | #if defined(DEBUG_SIGNAL) | |
bc8a22cc | 416 | fprintf(stderr, "qemu: got signal %d\n", sig); |
9de5e440 FB |
417 | #endif |
418 | host_to_target_siginfo_noswap(&tinfo, info); | |
419 | if (queue_signal(sig, &tinfo) == 1) { | |
420 | /* interrupt the virtual CPU as soon as possible */ | |
68a79315 | 421 | cpu_interrupt(global_env, CPU_INTERRUPT_EXIT); |
66fb9763 FB |
422 | } |
423 | } | |
424 | ||
425 | int do_sigaction(int sig, const struct target_sigaction *act, | |
426 | struct target_sigaction *oact) | |
427 | { | |
428 | struct emulated_sigaction *k; | |
773b93ee FB |
429 | struct sigaction act1; |
430 | int host_sig; | |
66fb9763 FB |
431 | |
432 | if (sig < 1 || sig > TARGET_NSIG) | |
433 | return -EINVAL; | |
434 | k = &sigact_table[sig - 1]; | |
773b93ee | 435 | #if defined(DEBUG_SIGNAL) |
66fb9763 FB |
436 | fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n", |
437 | sig, (int)act, (int)oact); | |
438 | #endif | |
439 | if (oact) { | |
440 | oact->_sa_handler = tswapl(k->sa._sa_handler); | |
441 | oact->sa_flags = tswapl(k->sa.sa_flags); | |
442 | oact->sa_restorer = tswapl(k->sa.sa_restorer); | |
443 | oact->sa_mask = k->sa.sa_mask; | |
444 | } | |
445 | if (act) { | |
446 | k->sa._sa_handler = tswapl(act->_sa_handler); | |
447 | k->sa.sa_flags = tswapl(act->sa_flags); | |
448 | k->sa.sa_restorer = tswapl(act->sa_restorer); | |
449 | k->sa.sa_mask = act->sa_mask; | |
773b93ee FB |
450 | |
451 | /* we update the host linux signal state */ | |
452 | host_sig = target_to_host_signal(sig); | |
453 | if (host_sig != SIGSEGV && host_sig != SIGBUS) { | |
454 | sigfillset(&act1.sa_mask); | |
455 | act1.sa_flags = SA_SIGINFO; | |
456 | if (k->sa.sa_flags & TARGET_SA_RESTART) | |
457 | act1.sa_flags |= SA_RESTART; | |
458 | /* NOTE: it is important to update the host kernel signal | |
459 | ignore state to avoid getting unexpected interrupted | |
460 | syscalls */ | |
461 | if (k->sa._sa_handler == TARGET_SIG_IGN) { | |
462 | act1.sa_sigaction = (void *)SIG_IGN; | |
463 | } else if (k->sa._sa_handler == TARGET_SIG_DFL) { | |
464 | act1.sa_sigaction = (void *)SIG_DFL; | |
465 | } else { | |
466 | act1.sa_sigaction = host_signal_handler; | |
467 | } | |
468 | sigaction(host_sig, &act1, NULL); | |
469 | } | |
66fb9763 FB |
470 | } |
471 | return 0; | |
472 | } | |
473 | ||
43fff238 FB |
474 | #ifndef offsetof |
475 | #define offsetof(type, field) ((size_t) &((type *)0)->field) | |
476 | #endif | |
477 | ||
478 | static inline int copy_siginfo_to_user(target_siginfo_t *tinfo, | |
479 | const target_siginfo_t *info) | |
480 | { | |
481 | tswap_siginfo(tinfo, info); | |
482 | return 0; | |
483 | } | |
484 | ||
66fb9763 FB |
485 | #ifdef TARGET_I386 |
486 | ||
487 | /* from the Linux kernel */ | |
488 | ||
489 | struct target_fpreg { | |
490 | uint16_t significand[4]; | |
491 | uint16_t exponent; | |
492 | }; | |
493 | ||
494 | struct target_fpxreg { | |
495 | uint16_t significand[4]; | |
496 | uint16_t exponent; | |
497 | uint16_t padding[3]; | |
498 | }; | |
499 | ||
500 | struct target_xmmreg { | |
501 | target_ulong element[4]; | |
502 | }; | |
503 | ||
504 | struct target_fpstate { | |
505 | /* Regular FPU environment */ | |
506 | target_ulong cw; | |
507 | target_ulong sw; | |
508 | target_ulong tag; | |
509 | target_ulong ipoff; | |
510 | target_ulong cssel; | |
511 | target_ulong dataoff; | |
512 | target_ulong datasel; | |
513 | struct target_fpreg _st[8]; | |
514 | uint16_t status; | |
515 | uint16_t magic; /* 0xffff = regular FPU data only */ | |
516 | ||
517 | /* FXSR FPU environment */ | |
518 | target_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */ | |
519 | target_ulong mxcsr; | |
520 | target_ulong reserved; | |
521 | struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ | |
522 | struct target_xmmreg _xmm[8]; | |
523 | target_ulong padding[56]; | |
524 | }; | |
525 | ||
526 | #define X86_FXSR_MAGIC 0x0000 | |
527 | ||
528 | struct target_sigcontext { | |
529 | uint16_t gs, __gsh; | |
530 | uint16_t fs, __fsh; | |
531 | uint16_t es, __esh; | |
532 | uint16_t ds, __dsh; | |
533 | target_ulong edi; | |
534 | target_ulong esi; | |
535 | target_ulong ebp; | |
536 | target_ulong esp; | |
537 | target_ulong ebx; | |
538 | target_ulong edx; | |
539 | target_ulong ecx; | |
540 | target_ulong eax; | |
541 | target_ulong trapno; | |
542 | target_ulong err; | |
543 | target_ulong eip; | |
544 | uint16_t cs, __csh; | |
545 | target_ulong eflags; | |
546 | target_ulong esp_at_signal; | |
547 | uint16_t ss, __ssh; | |
548 | target_ulong fpstate; /* pointer */ | |
549 | target_ulong oldmask; | |
550 | target_ulong cr2; | |
551 | }; | |
552 | ||
553 | typedef struct target_sigaltstack { | |
554 | target_ulong ss_sp; | |
555 | int ss_flags; | |
556 | target_ulong ss_size; | |
557 | } target_stack_t; | |
558 | ||
559 | struct target_ucontext { | |
560 | target_ulong uc_flags; | |
561 | target_ulong uc_link; | |
562 | target_stack_t uc_stack; | |
563 | struct target_sigcontext uc_mcontext; | |
564 | target_sigset_t uc_sigmask; /* mask last for extensibility */ | |
565 | }; | |
566 | ||
567 | struct sigframe | |
568 | { | |
569 | target_ulong pretcode; | |
570 | int sig; | |
571 | struct target_sigcontext sc; | |
572 | struct target_fpstate fpstate; | |
573 | target_ulong extramask[TARGET_NSIG_WORDS-1]; | |
574 | char retcode[8]; | |
575 | }; | |
576 | ||
577 | struct rt_sigframe | |
578 | { | |
579 | target_ulong pretcode; | |
580 | int sig; | |
581 | target_ulong pinfo; | |
582 | target_ulong puc; | |
583 | struct target_siginfo info; | |
584 | struct target_ucontext uc; | |
585 | struct target_fpstate fpstate; | |
586 | char retcode[8]; | |
587 | }; | |
588 | ||
589 | /* | |
590 | * Set up a signal frame. | |
591 | */ | |
592 | ||
66fb9763 FB |
593 | /* XXX: save x87 state */ |
594 | static int | |
595 | setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate, | |
596 | CPUX86State *env, unsigned long mask) | |
597 | { | |
598 | int err = 0; | |
599 | ||
a52c757c FB |
600 | err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs); |
601 | err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs); | |
602 | err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es); | |
603 | err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds); | |
66fb9763 FB |
604 | err |= __put_user(env->regs[R_EDI], &sc->edi); |
605 | err |= __put_user(env->regs[R_ESI], &sc->esi); | |
606 | err |= __put_user(env->regs[R_EBP], &sc->ebp); | |
607 | err |= __put_user(env->regs[R_ESP], &sc->esp); | |
608 | err |= __put_user(env->regs[R_EBX], &sc->ebx); | |
609 | err |= __put_user(env->regs[R_EDX], &sc->edx); | |
610 | err |= __put_user(env->regs[R_ECX], &sc->ecx); | |
611 | err |= __put_user(env->regs[R_EAX], &sc->eax); | |
66099dd9 FB |
612 | err |= __put_user(env->exception_index, &sc->trapno); |
613 | err |= __put_user(env->error_code, &sc->err); | |
66fb9763 | 614 | err |= __put_user(env->eip, &sc->eip); |
a52c757c | 615 | err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); |
66fb9763 FB |
616 | err |= __put_user(env->eflags, &sc->eflags); |
617 | err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal); | |
a52c757c | 618 | err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); |
ed2dcdf6 FB |
619 | |
620 | cpu_x86_fsave(env, (void *)fpstate, 1); | |
621 | fpstate->status = fpstate->sw; | |
622 | err |= __put_user(0xffff, &fpstate->magic); | |
623 | err |= __put_user(fpstate, &sc->fpstate); | |
624 | ||
66fb9763 FB |
625 | /* non-iBCS2 extensions.. */ |
626 | err |= __put_user(mask, &sc->oldmask); | |
a52c757c | 627 | err |= __put_user(env->cr[2], &sc->cr2); |
66fb9763 | 628 | return err; |
31e31b8a FB |
629 | } |
630 | ||
66fb9763 FB |
631 | /* |
632 | * Determine which stack to use.. | |
633 | */ | |
31e31b8a | 634 | |
66fb9763 FB |
635 | static inline void * |
636 | get_sigframe(struct emulated_sigaction *ka, CPUX86State *env, size_t frame_size) | |
31e31b8a | 637 | { |
66fb9763 FB |
638 | unsigned long esp; |
639 | ||
640 | /* Default to using normal stack */ | |
641 | esp = env->regs[R_ESP]; | |
642 | #if 0 | |
643 | /* This is the X/Open sanctioned signal stack switching. */ | |
644 | if (ka->sa.sa_flags & SA_ONSTACK) { | |
645 | if (sas_ss_flags(esp) == 0) | |
646 | esp = current->sas_ss_sp + current->sas_ss_size; | |
647 | } | |
648 | ||
649 | /* This is the legacy signal stack switching. */ | |
a52c757c | 650 | else |
66fb9763 | 651 | #endif |
a52c757c FB |
652 | if ((env->segs[R_SS].selector & 0xffff) != __USER_DS && |
653 | !(ka->sa.sa_flags & TARGET_SA_RESTORER) && | |
654 | ka->sa.sa_restorer) { | |
655 | esp = (unsigned long) ka->sa.sa_restorer; | |
656 | } | |
657 | return (void *)((esp - frame_size) & -8ul); | |
66fb9763 FB |
658 | } |
659 | ||
66fb9763 FB |
660 | static void setup_frame(int sig, struct emulated_sigaction *ka, |
661 | target_sigset_t *set, CPUX86State *env) | |
662 | { | |
663 | struct sigframe *frame; | |
9231944d | 664 | int i, err = 0; |
66fb9763 FB |
665 | |
666 | frame = get_sigframe(ka, env, sizeof(*frame)); | |
667 | ||
66fb9763 FB |
668 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) |
669 | goto give_sigsegv; | |
66fb9763 FB |
670 | err |= __put_user((/*current->exec_domain |
671 | && current->exec_domain->signal_invmap | |
672 | && sig < 32 | |
673 | ? current->exec_domain->signal_invmap[sig] | |
674 | : */ sig), | |
675 | &frame->sig); | |
676 | if (err) | |
677 | goto give_sigsegv; | |
678 | ||
679 | setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0]); | |
680 | if (err) | |
681 | goto give_sigsegv; | |
682 | ||
9231944d FB |
683 | for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
684 | if (__put_user(set->sig[i], &frame->extramask[i - 1])) | |
685 | goto give_sigsegv; | |
686 | } | |
66fb9763 FB |
687 | |
688 | /* Set up to return from userspace. If provided, use a stub | |
689 | already in userspace. */ | |
690 | if (ka->sa.sa_flags & TARGET_SA_RESTORER) { | |
691 | err |= __put_user(ka->sa.sa_restorer, &frame->pretcode); | |
692 | } else { | |
693 | err |= __put_user(frame->retcode, &frame->pretcode); | |
694 | /* This is popl %eax ; movl $,%eax ; int $0x80 */ | |
695 | err |= __put_user(0xb858, (short *)(frame->retcode+0)); | |
696 | err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); | |
697 | err |= __put_user(0x80cd, (short *)(frame->retcode+6)); | |
698 | } | |
699 | ||
700 | if (err) | |
701 | goto give_sigsegv; | |
702 | ||
703 | /* Set up registers for signal handler */ | |
704 | env->regs[R_ESP] = (unsigned long) frame; | |
705 | env->eip = (unsigned long) ka->sa._sa_handler; | |
706 | ||
707 | cpu_x86_load_seg(env, R_DS, __USER_DS); | |
708 | cpu_x86_load_seg(env, R_ES, __USER_DS); | |
709 | cpu_x86_load_seg(env, R_SS, __USER_DS); | |
710 | cpu_x86_load_seg(env, R_CS, __USER_CS); | |
711 | env->eflags &= ~TF_MASK; | |
712 | ||
713 | return; | |
714 | ||
715 | give_sigsegv: | |
716 | if (sig == TARGET_SIGSEGV) | |
717 | ka->sa._sa_handler = TARGET_SIG_DFL; | |
718 | force_sig(TARGET_SIGSEGV /* , current */); | |
719 | } | |
720 | ||
9de5e440 FB |
721 | static void setup_rt_frame(int sig, struct emulated_sigaction *ka, |
722 | target_siginfo_t *info, | |
66fb9763 FB |
723 | target_sigset_t *set, CPUX86State *env) |
724 | { | |
725 | struct rt_sigframe *frame; | |
9231944d | 726 | int i, err = 0; |
66fb9763 FB |
727 | |
728 | frame = get_sigframe(ka, env, sizeof(*frame)); | |
729 | ||
66fb9763 FB |
730 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) |
731 | goto give_sigsegv; | |
66fb9763 FB |
732 | |
733 | err |= __put_user((/*current->exec_domain | |
734 | && current->exec_domain->signal_invmap | |
735 | && sig < 32 | |
736 | ? current->exec_domain->signal_invmap[sig] | |
737 | : */sig), | |
738 | &frame->sig); | |
739 | err |= __put_user((target_ulong)&frame->info, &frame->pinfo); | |
740 | err |= __put_user((target_ulong)&frame->uc, &frame->puc); | |
741 | err |= copy_siginfo_to_user(&frame->info, info); | |
742 | if (err) | |
743 | goto give_sigsegv; | |
31e31b8a | 744 | |
66fb9763 FB |
745 | /* Create the ucontext. */ |
746 | err |= __put_user(0, &frame->uc.uc_flags); | |
747 | err |= __put_user(0, &frame->uc.uc_link); | |
748 | err |= __put_user(/*current->sas_ss_sp*/ 0, &frame->uc.uc_stack.ss_sp); | |
749 | err |= __put_user(/* sas_ss_flags(regs->esp) */ 0, | |
750 | &frame->uc.uc_stack.ss_flags); | |
751 | err |= __put_user(/* current->sas_ss_size */ 0, &frame->uc.uc_stack.ss_size); | |
752 | err |= setup_sigcontext(&frame->uc.uc_mcontext, &frame->fpstate, | |
753 | env, set->sig[0]); | |
9231944d FB |
754 | for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
755 | if (__put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i])) | |
756 | goto give_sigsegv; | |
757 | } | |
31e31b8a | 758 | |
66fb9763 FB |
759 | /* Set up to return from userspace. If provided, use a stub |
760 | already in userspace. */ | |
761 | if (ka->sa.sa_flags & TARGET_SA_RESTORER) { | |
762 | err |= __put_user(ka->sa.sa_restorer, &frame->pretcode); | |
763 | } else { | |
764 | err |= __put_user(frame->retcode, &frame->pretcode); | |
765 | /* This is movl $,%eax ; int $0x80 */ | |
766 | err |= __put_user(0xb8, (char *)(frame->retcode+0)); | |
767 | err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); | |
768 | err |= __put_user(0x80cd, (short *)(frame->retcode+5)); | |
769 | } | |
770 | ||
771 | if (err) | |
772 | goto give_sigsegv; | |
773 | ||
774 | /* Set up registers for signal handler */ | |
775 | env->regs[R_ESP] = (unsigned long) frame; | |
776 | env->eip = (unsigned long) ka->sa._sa_handler; | |
777 | ||
778 | cpu_x86_load_seg(env, R_DS, __USER_DS); | |
779 | cpu_x86_load_seg(env, R_ES, __USER_DS); | |
780 | cpu_x86_load_seg(env, R_SS, __USER_DS); | |
781 | cpu_x86_load_seg(env, R_CS, __USER_CS); | |
782 | env->eflags &= ~TF_MASK; | |
783 | ||
784 | return; | |
785 | ||
786 | give_sigsegv: | |
787 | if (sig == TARGET_SIGSEGV) | |
788 | ka->sa._sa_handler = TARGET_SIG_DFL; | |
789 | force_sig(TARGET_SIGSEGV /* , current */); | |
790 | } | |
791 | ||
792 | static int | |
793 | restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax) | |
794 | { | |
795 | unsigned int err = 0; | |
796 | ||
66fb9763 FB |
797 | cpu_x86_load_seg(env, R_GS, lduw(&sc->gs)); |
798 | cpu_x86_load_seg(env, R_FS, lduw(&sc->fs)); | |
799 | cpu_x86_load_seg(env, R_ES, lduw(&sc->es)); | |
800 | cpu_x86_load_seg(env, R_DS, lduw(&sc->ds)); | |
801 | ||
802 | env->regs[R_EDI] = ldl(&sc->edi); | |
803 | env->regs[R_ESI] = ldl(&sc->esi); | |
804 | env->regs[R_EBP] = ldl(&sc->ebp); | |
805 | env->regs[R_ESP] = ldl(&sc->esp); | |
806 | env->regs[R_EBX] = ldl(&sc->ebx); | |
807 | env->regs[R_EDX] = ldl(&sc->edx); | |
808 | env->regs[R_ECX] = ldl(&sc->ecx); | |
809 | env->eip = ldl(&sc->eip); | |
810 | ||
811 | cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3); | |
812 | cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3); | |
813 | ||
814 | { | |
815 | unsigned int tmpflags; | |
816 | tmpflags = ldl(&sc->eflags); | |
817 | env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5); | |
818 | // regs->orig_eax = -1; /* disable syscall checks */ | |
819 | } | |
820 | ||
66fb9763 FB |
821 | { |
822 | struct _fpstate * buf; | |
ed2dcdf6 | 823 | buf = (void *)ldl(&sc->fpstate); |
66fb9763 | 824 | if (buf) { |
ed2dcdf6 | 825 | #if 0 |
66fb9763 FB |
826 | if (verify_area(VERIFY_READ, buf, sizeof(*buf))) |
827 | goto badframe; | |
ed2dcdf6 FB |
828 | #endif |
829 | cpu_x86_frstor(env, (void *)buf, 1); | |
66fb9763 FB |
830 | } |
831 | } | |
ed2dcdf6 | 832 | |
66fb9763 FB |
833 | *peax = ldl(&sc->eax); |
834 | return err; | |
835 | #if 0 | |
836 | badframe: | |
837 | return 1; | |
838 | #endif | |
839 | } | |
840 | ||
841 | long do_sigreturn(CPUX86State *env) | |
842 | { | |
843 | struct sigframe *frame = (struct sigframe *)(env->regs[R_ESP] - 8); | |
844 | target_sigset_t target_set; | |
845 | sigset_t set; | |
846 | int eax, i; | |
847 | ||
447db213 FB |
848 | #if defined(DEBUG_SIGNAL) |
849 | fprintf(stderr, "do_sigreturn\n"); | |
850 | #endif | |
66fb9763 | 851 | /* set blocked signals */ |
9231944d FB |
852 | if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
853 | goto badframe; | |
854 | for(i = 1; i < TARGET_NSIG_WORDS; i++) { | |
855 | if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) | |
856 | goto badframe; | |
857 | } | |
66fb9763 | 858 | |
9231944d | 859 | target_to_host_sigset_internal(&set, &target_set); |
66fb9763 FB |
860 | sigprocmask(SIG_SETMASK, &set, NULL); |
861 | ||
862 | /* restore registers */ | |
863 | if (restore_sigcontext(env, &frame->sc, &eax)) | |
864 | goto badframe; | |
865 | return eax; | |
866 | ||
867 | badframe: | |
868 | force_sig(TARGET_SIGSEGV); | |
869 | return 0; | |
870 | } | |
871 | ||
872 | long do_rt_sigreturn(CPUX86State *env) | |
873 | { | |
874 | struct rt_sigframe *frame = (struct rt_sigframe *)(env->regs[R_ESP] - 4); | |
66fb9763 FB |
875 | sigset_t set; |
876 | // stack_t st; | |
877 | int eax; | |
878 | ||
879 | #if 0 | |
880 | if (verify_area(VERIFY_READ, frame, sizeof(*frame))) | |
881 | goto badframe; | |
882 | #endif | |
9231944d | 883 | target_to_host_sigset(&set, &frame->uc.uc_sigmask); |
66fb9763 FB |
884 | sigprocmask(SIG_SETMASK, &set, NULL); |
885 | ||
886 | if (restore_sigcontext(env, &frame->uc.uc_mcontext, &eax)) | |
887 | goto badframe; | |
888 | ||
889 | #if 0 | |
890 | if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st))) | |
891 | goto badframe; | |
892 | /* It is more difficult to avoid calling this function than to | |
893 | call it and ignore errors. */ | |
894 | do_sigaltstack(&st, NULL, regs->esp); | |
895 | #endif | |
896 | return eax; | |
897 | ||
898 | badframe: | |
899 | force_sig(TARGET_SIGSEGV); | |
900 | return 0; | |
901 | } | |
902 | ||
43fff238 FB |
903 | #elif defined(TARGET_ARM) |
904 | ||
905 | struct target_sigcontext { | |
906 | target_ulong trap_no; | |
907 | target_ulong error_code; | |
908 | target_ulong oldmask; | |
909 | target_ulong arm_r0; | |
910 | target_ulong arm_r1; | |
911 | target_ulong arm_r2; | |
912 | target_ulong arm_r3; | |
913 | target_ulong arm_r4; | |
914 | target_ulong arm_r5; | |
915 | target_ulong arm_r6; | |
916 | target_ulong arm_r7; | |
917 | target_ulong arm_r8; | |
918 | target_ulong arm_r9; | |
919 | target_ulong arm_r10; | |
920 | target_ulong arm_fp; | |
921 | target_ulong arm_ip; | |
922 | target_ulong arm_sp; | |
923 | target_ulong arm_lr; | |
924 | target_ulong arm_pc; | |
925 | target_ulong arm_cpsr; | |
926 | target_ulong fault_address; | |
927 | }; | |
928 | ||
929 | typedef struct target_sigaltstack { | |
930 | target_ulong ss_sp; | |
931 | int ss_flags; | |
932 | target_ulong ss_size; | |
933 | } target_stack_t; | |
934 | ||
935 | struct target_ucontext { | |
936 | target_ulong uc_flags; | |
937 | target_ulong uc_link; | |
938 | target_stack_t uc_stack; | |
939 | struct target_sigcontext uc_mcontext; | |
940 | target_sigset_t uc_sigmask; /* mask last for extensibility */ | |
941 | }; | |
942 | ||
943 | struct sigframe | |
944 | { | |
945 | struct target_sigcontext sc; | |
946 | target_ulong extramask[TARGET_NSIG_WORDS-1]; | |
947 | target_ulong retcode; | |
948 | }; | |
949 | ||
950 | struct rt_sigframe | |
951 | { | |
952 | struct target_siginfo *pinfo; | |
953 | void *puc; | |
954 | struct target_siginfo info; | |
955 | struct target_ucontext uc; | |
956 | target_ulong retcode; | |
957 | }; | |
958 | ||
959 | #define TARGET_CONFIG_CPU_32 1 | |
960 | ||
961 | /* | |
962 | * For ARM syscalls, we encode the syscall number into the instruction. | |
963 | */ | |
964 | #define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) | |
965 | #define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) | |
966 | ||
967 | /* | |
968 | * For Thumb syscalls, we pass the syscall number via r7. We therefore | |
969 | * need two 16-bit instructions. | |
970 | */ | |
971 | #define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) | |
972 | #define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) | |
973 | ||
974 | static const target_ulong retcodes[4] = { | |
975 | SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, | |
976 | SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN | |
977 | }; | |
978 | ||
979 | ||
980 | #define __put_user_error(x,p,e) __put_user(x, p) | |
981 | #define __get_user_error(x,p,e) __get_user(x, p) | |
982 | ||
983 | static inline int valid_user_regs(CPUState *regs) | |
984 | { | |
985 | return 1; | |
986 | } | |
987 | ||
988 | static int | |
989 | setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ | |
990 | CPUState *env, unsigned long mask) | |
991 | { | |
992 | int err = 0; | |
993 | ||
994 | __put_user_error(env->regs[0], &sc->arm_r0, err); | |
995 | __put_user_error(env->regs[1], &sc->arm_r1, err); | |
996 | __put_user_error(env->regs[2], &sc->arm_r2, err); | |
997 | __put_user_error(env->regs[3], &sc->arm_r3, err); | |
998 | __put_user_error(env->regs[4], &sc->arm_r4, err); | |
999 | __put_user_error(env->regs[5], &sc->arm_r5, err); | |
1000 | __put_user_error(env->regs[6], &sc->arm_r6, err); | |
1001 | __put_user_error(env->regs[7], &sc->arm_r7, err); | |
1002 | __put_user_error(env->regs[8], &sc->arm_r8, err); | |
1003 | __put_user_error(env->regs[9], &sc->arm_r9, err); | |
1004 | __put_user_error(env->regs[10], &sc->arm_r10, err); | |
1005 | __put_user_error(env->regs[11], &sc->arm_fp, err); | |
1006 | __put_user_error(env->regs[12], &sc->arm_ip, err); | |
1007 | __put_user_error(env->regs[13], &sc->arm_sp, err); | |
1008 | __put_user_error(env->regs[14], &sc->arm_lr, err); | |
1009 | __put_user_error(env->regs[15], &sc->arm_pc, err); | |
1010 | #ifdef TARGET_CONFIG_CPU_32 | |
1011 | __put_user_error(env->cpsr, &sc->arm_cpsr, err); | |
1012 | #endif | |
1013 | ||
1014 | __put_user_error(/* current->thread.trap_no */ 0, &sc->trap_no, err); | |
1015 | __put_user_error(/* current->thread.error_code */ 0, &sc->error_code, err); | |
1016 | __put_user_error(/* current->thread.address */ 0, &sc->fault_address, err); | |
1017 | __put_user_error(mask, &sc->oldmask, err); | |
1018 | ||
1019 | return err; | |
1020 | } | |
1021 | ||
1022 | static inline void * | |
1023 | get_sigframe(struct emulated_sigaction *ka, CPUState *regs, int framesize) | |
1024 | { | |
1025 | unsigned long sp = regs->regs[13]; | |
1026 | ||
1027 | #if 0 | |
1028 | /* | |
1029 | * This is the X/Open sanctioned signal stack switching. | |
1030 | */ | |
1031 | if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp)) | |
1032 | sp = current->sas_ss_sp + current->sas_ss_size; | |
1033 | #endif | |
1034 | /* | |
1035 | * ATPCS B01 mandates 8-byte alignment | |
1036 | */ | |
1037 | return (void *)((sp - framesize) & ~7); | |
1038 | } | |
1039 | ||
1040 | static int | |
1041 | setup_return(CPUState *env, struct emulated_sigaction *ka, | |
1042 | target_ulong *rc, void *frame, int usig) | |
1043 | { | |
1044 | target_ulong handler = (target_ulong)ka->sa._sa_handler; | |
1045 | target_ulong retcode; | |
1046 | int thumb = 0; | |
1047 | #if defined(TARGET_CONFIG_CPU_32) | |
1048 | target_ulong cpsr = env->cpsr; | |
1049 | ||
1050 | #if 0 | |
1051 | /* | |
1052 | * Maybe we need to deliver a 32-bit signal to a 26-bit task. | |
1053 | */ | |
1054 | if (ka->sa.sa_flags & SA_THIRTYTWO) | |
1055 | cpsr = (cpsr & ~MODE_MASK) | USR_MODE; | |
1056 | ||
1057 | #ifdef CONFIG_ARM_THUMB | |
1058 | if (elf_hwcap & HWCAP_THUMB) { | |
1059 | /* | |
1060 | * The LSB of the handler determines if we're going to | |
1061 | * be using THUMB or ARM mode for this signal handler. | |
1062 | */ | |
1063 | thumb = handler & 1; | |
1064 | ||
1065 | if (thumb) | |
1066 | cpsr |= T_BIT; | |
1067 | else | |
1068 | cpsr &= ~T_BIT; | |
1069 | } | |
1070 | #endif | |
1071 | #endif | |
1072 | #endif /* TARGET_CONFIG_CPU_32 */ | |
1073 | ||
1074 | if (ka->sa.sa_flags & TARGET_SA_RESTORER) { | |
1075 | retcode = (target_ulong)ka->sa.sa_restorer; | |
1076 | } else { | |
1077 | unsigned int idx = thumb; | |
1078 | ||
1079 | if (ka->sa.sa_flags & TARGET_SA_SIGINFO) | |
1080 | idx += 2; | |
1081 | ||
1082 | if (__put_user(retcodes[idx], rc)) | |
1083 | return 1; | |
1084 | #if 0 | |
1085 | flush_icache_range((target_ulong)rc, | |
1086 | (target_ulong)(rc + 1)); | |
1087 | #endif | |
1088 | retcode = ((target_ulong)rc) + thumb; | |
1089 | } | |
1090 | ||
1091 | env->regs[0] = usig; | |
1092 | env->regs[13] = (target_ulong)frame; | |
1093 | env->regs[14] = retcode; | |
1094 | env->regs[15] = handler & (thumb ? ~1 : ~3); | |
1095 | ||
1096 | #ifdef TARGET_CONFIG_CPU_32 | |
1097 | env->cpsr = cpsr; | |
1098 | #endif | |
1099 | ||
1100 | return 0; | |
1101 | } | |
1102 | ||
1103 | static void setup_frame(int usig, struct emulated_sigaction *ka, | |
1104 | target_sigset_t *set, CPUState *regs) | |
1105 | { | |
1106 | struct sigframe *frame = get_sigframe(ka, regs, sizeof(*frame)); | |
9231944d | 1107 | int i, err = 0; |
43fff238 FB |
1108 | |
1109 | err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]); | |
1110 | ||
9231944d FB |
1111 | for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1112 | if (__put_user(set->sig[i], &frame->extramask[i - 1])) | |
1113 | return; | |
43fff238 FB |
1114 | } |
1115 | ||
1116 | if (err == 0) | |
1117 | err = setup_return(regs, ka, &frame->retcode, frame, usig); | |
1118 | // return err; | |
1119 | } | |
1120 | ||
1121 | static void setup_rt_frame(int usig, struct emulated_sigaction *ka, | |
1122 | target_siginfo_t *info, | |
1123 | target_sigset_t *set, CPUState *env) | |
1124 | { | |
1125 | struct rt_sigframe *frame = get_sigframe(ka, env, sizeof(*frame)); | |
9231944d | 1126 | int i, err = 0; |
43fff238 | 1127 | |
43fff238 | 1128 | if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) |
edf779ff FB |
1129 | return /* 1 */; |
1130 | ||
43fff238 FB |
1131 | __put_user_error(&frame->info, (target_ulong *)&frame->pinfo, err); |
1132 | __put_user_error(&frame->uc, (target_ulong *)&frame->puc, err); | |
1133 | err |= copy_siginfo_to_user(&frame->info, info); | |
1134 | ||
1135 | /* Clear all the bits of the ucontext we don't use. */ | |
1136 | err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext)); | |
1137 | ||
1138 | err |= setup_sigcontext(&frame->uc.uc_mcontext, /*&frame->fpstate,*/ | |
1139 | env, set->sig[0]); | |
9231944d FB |
1140 | for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
1141 | if (__put_user(set->sig[i], &frame->uc.uc_sigmask.sig[i])) | |
1142 | return; | |
1143 | } | |
43fff238 FB |
1144 | |
1145 | if (err == 0) | |
1146 | err = setup_return(env, ka, &frame->retcode, frame, usig); | |
1147 | ||
1148 | if (err == 0) { | |
1149 | /* | |
1150 | * For realtime signals we must also set the second and third | |
1151 | * arguments for the signal handler. | |
1152 | * -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06 | |
1153 | */ | |
1154 | env->regs[1] = (target_ulong)frame->pinfo; | |
1155 | env->regs[2] = (target_ulong)frame->puc; | |
1156 | } | |
1157 | ||
1158 | // return err; | |
1159 | } | |
1160 | ||
1161 | static int | |
1162 | restore_sigcontext(CPUState *env, struct target_sigcontext *sc) | |
1163 | { | |
1164 | int err = 0; | |
1165 | ||
1166 | __get_user_error(env->regs[0], &sc->arm_r0, err); | |
1167 | __get_user_error(env->regs[1], &sc->arm_r1, err); | |
1168 | __get_user_error(env->regs[2], &sc->arm_r2, err); | |
1169 | __get_user_error(env->regs[3], &sc->arm_r3, err); | |
1170 | __get_user_error(env->regs[4], &sc->arm_r4, err); | |
1171 | __get_user_error(env->regs[5], &sc->arm_r5, err); | |
1172 | __get_user_error(env->regs[6], &sc->arm_r6, err); | |
1173 | __get_user_error(env->regs[7], &sc->arm_r7, err); | |
1174 | __get_user_error(env->regs[8], &sc->arm_r8, err); | |
1175 | __get_user_error(env->regs[9], &sc->arm_r9, err); | |
1176 | __get_user_error(env->regs[10], &sc->arm_r10, err); | |
1177 | __get_user_error(env->regs[11], &sc->arm_fp, err); | |
1178 | __get_user_error(env->regs[12], &sc->arm_ip, err); | |
1179 | __get_user_error(env->regs[13], &sc->arm_sp, err); | |
1180 | __get_user_error(env->regs[14], &sc->arm_lr, err); | |
1181 | __get_user_error(env->regs[15], &sc->arm_pc, err); | |
1182 | #ifdef TARGET_CONFIG_CPU_32 | |
1183 | __get_user_error(env->cpsr, &sc->arm_cpsr, err); | |
1184 | #endif | |
1185 | ||
1186 | err |= !valid_user_regs(env); | |
1187 | ||
1188 | return err; | |
1189 | } | |
1190 | ||
1191 | long do_sigreturn(CPUState *env) | |
1192 | { | |
1193 | struct sigframe *frame; | |
1194 | target_sigset_t set; | |
1195 | sigset_t host_set; | |
9231944d | 1196 | int i; |
43fff238 FB |
1197 | |
1198 | /* | |
1199 | * Since we stacked the signal on a 64-bit boundary, | |
1200 | * then 'sp' should be word aligned here. If it's | |
1201 | * not, then the user is trying to mess with us. | |
1202 | */ | |
1203 | if (env->regs[13] & 7) | |
1204 | goto badframe; | |
1205 | ||
1206 | frame = (struct sigframe *)env->regs[13]; | |
1207 | ||
1208 | #if 0 | |
1209 | if (verify_area(VERIFY_READ, frame, sizeof (*frame))) | |
1210 | goto badframe; | |
1211 | #endif | |
9231944d FB |
1212 | if (__get_user(set.sig[0], &frame->sc.oldmask)) |
1213 | goto badframe; | |
1214 | for(i = 1; i < TARGET_NSIG_WORDS; i++) { | |
1215 | if (__get_user(set.sig[i], &frame->extramask[i - 1])) | |
1216 | goto badframe; | |
1217 | } | |
43fff238 | 1218 | |
9231944d | 1219 | target_to_host_sigset_internal(&host_set, &set); |
43fff238 FB |
1220 | sigprocmask(SIG_SETMASK, &host_set, NULL); |
1221 | ||
1222 | if (restore_sigcontext(env, &frame->sc)) | |
1223 | goto badframe; | |
1224 | ||
1225 | #if 0 | |
1226 | /* Send SIGTRAP if we're single-stepping */ | |
1227 | if (ptrace_cancel_bpt(current)) | |
1228 | send_sig(SIGTRAP, current, 1); | |
1229 | #endif | |
1230 | return env->regs[0]; | |
1231 | ||
1232 | badframe: | |
1233 | force_sig(SIGSEGV /* , current */); | |
1234 | return 0; | |
1235 | } | |
1236 | ||
1237 | long do_rt_sigreturn(CPUState *env) | |
1238 | { | |
1239 | struct rt_sigframe *frame; | |
43fff238 FB |
1240 | sigset_t host_set; |
1241 | ||
1242 | /* | |
1243 | * Since we stacked the signal on a 64-bit boundary, | |
1244 | * then 'sp' should be word aligned here. If it's | |
1245 | * not, then the user is trying to mess with us. | |
1246 | */ | |
1247 | if (env->regs[13] & 7) | |
1248 | goto badframe; | |
1249 | ||
1250 | frame = (struct rt_sigframe *)env->regs[13]; | |
1251 | ||
1252 | #if 0 | |
1253 | if (verify_area(VERIFY_READ, frame, sizeof (*frame))) | |
1254 | goto badframe; | |
1255 | #endif | |
9231944d | 1256 | target_to_host_sigset(&host_set, &frame->uc.uc_sigmask); |
43fff238 FB |
1257 | sigprocmask(SIG_SETMASK, &host_set, NULL); |
1258 | ||
1259 | if (restore_sigcontext(env, &frame->uc.uc_mcontext)) | |
1260 | goto badframe; | |
1261 | ||
1262 | #if 0 | |
1263 | /* Send SIGTRAP if we're single-stepping */ | |
1264 | if (ptrace_cancel_bpt(current)) | |
1265 | send_sig(SIGTRAP, current, 1); | |
1266 | #endif | |
1267 | return env->regs[0]; | |
1268 | ||
1269 | badframe: | |
1270 | force_sig(SIGSEGV /* , current */); | |
1271 | return 0; | |
1272 | } | |
1273 | ||
b346ff46 FB |
1274 | #else |
1275 | ||
1276 | static void setup_frame(int sig, struct emulated_sigaction *ka, | |
1277 | target_sigset_t *set, CPUState *env) | |
1278 | { | |
1279 | fprintf(stderr, "setup_frame: not implemented\n"); | |
1280 | } | |
1281 | ||
1282 | static void setup_rt_frame(int sig, struct emulated_sigaction *ka, | |
1283 | target_siginfo_t *info, | |
1284 | target_sigset_t *set, CPUState *env) | |
1285 | { | |
1286 | fprintf(stderr, "setup_rt_frame: not implemented\n"); | |
1287 | } | |
1288 | ||
1289 | long do_sigreturn(CPUState *env) | |
1290 | { | |
1291 | fprintf(stderr, "do_sigreturn: not implemented\n"); | |
1292 | return -ENOSYS; | |
1293 | } | |
1294 | ||
1295 | long do_rt_sigreturn(CPUState *env) | |
1296 | { | |
1297 | fprintf(stderr, "do_rt_sigreturn: not implemented\n"); | |
1298 | return -ENOSYS; | |
1299 | } | |
1300 | ||
66fb9763 FB |
1301 | #endif |
1302 | ||
1303 | void process_pending_signals(void *cpu_env) | |
1304 | { | |
1305 | int sig; | |
1306 | target_ulong handler; | |
9de5e440 FB |
1307 | sigset_t set, old_set; |
1308 | target_sigset_t target_old_set; | |
66fb9763 FB |
1309 | struct emulated_sigaction *k; |
1310 | struct sigqueue *q; | |
1311 | ||
31e31b8a FB |
1312 | if (!signal_pending) |
1313 | return; | |
1314 | ||
66fb9763 FB |
1315 | k = sigact_table; |
1316 | for(sig = 1; sig <= TARGET_NSIG; sig++) { | |
1317 | if (k->pending) | |
31e31b8a | 1318 | goto handle_signal; |
66fb9763 | 1319 | k++; |
31e31b8a FB |
1320 | } |
1321 | /* if no signal is pending, just return */ | |
1322 | signal_pending = 0; | |
1323 | return; | |
66fb9763 | 1324 | |
31e31b8a | 1325 | handle_signal: |
66fb9763 | 1326 | #ifdef DEBUG_SIGNAL |
bc8a22cc | 1327 | fprintf(stderr, "qemu: process signal %d\n", sig); |
66fb9763 FB |
1328 | #endif |
1329 | /* dequeue signal */ | |
1330 | q = k->first; | |
1331 | k->first = q->next; | |
1332 | if (!k->first) | |
1333 | k->pending = 0; | |
1334 | ||
1335 | handler = k->sa._sa_handler; | |
1336 | if (handler == TARGET_SIG_DFL) { | |
1337 | /* default handler : ignore some signal. The other are fatal */ | |
1338 | if (sig != TARGET_SIGCHLD && | |
1339 | sig != TARGET_SIGURG && | |
1340 | sig != TARGET_SIGWINCH) { | |
1341 | force_sig(sig); | |
1342 | } | |
1343 | } else if (handler == TARGET_SIG_IGN) { | |
1344 | /* ignore sig */ | |
1345 | } else if (handler == TARGET_SIG_ERR) { | |
1346 | force_sig(sig); | |
1347 | } else { | |
9de5e440 FB |
1348 | /* compute the blocked signals during the handler execution */ |
1349 | target_to_host_sigset(&set, &k->sa.sa_mask); | |
1350 | /* SA_NODEFER indicates that the current signal should not be | |
1351 | blocked during the handler */ | |
1352 | if (!(k->sa.sa_flags & TARGET_SA_NODEFER)) | |
1353 | sigaddset(&set, target_to_host_signal(sig)); | |
1354 | ||
1355 | /* block signals in the handler using Linux */ | |
1356 | sigprocmask(SIG_BLOCK, &set, &old_set); | |
1357 | /* save the previous blocked signal state to restore it at the | |
1358 | end of the signal execution (see do_sigreturn) */ | |
9231944d | 1359 | host_to_target_sigset_internal(&target_old_set, &old_set); |
9de5e440 | 1360 | |
bc8a22cc FB |
1361 | /* if the CPU is in VM86 mode, we restore the 32 bit values */ |
1362 | #ifdef TARGET_I386 | |
1363 | { | |
1364 | CPUX86State *env = cpu_env; | |
1365 | if (env->eflags & VM_MASK) | |
1366 | save_v86_state(env); | |
1367 | } | |
1368 | #endif | |
9de5e440 | 1369 | /* prepare the stack frame of the virtual CPU */ |
66fb9763 | 1370 | if (k->sa.sa_flags & TARGET_SA_SIGINFO) |
9de5e440 | 1371 | setup_rt_frame(sig, k, &q->info, &target_old_set, cpu_env); |
66fb9763 | 1372 | else |
9de5e440 | 1373 | setup_frame(sig, k, &target_old_set, cpu_env); |
66fb9763 FB |
1374 | if (k->sa.sa_flags & TARGET_SA_RESETHAND) |
1375 | k->sa._sa_handler = TARGET_SIG_DFL; | |
31e31b8a | 1376 | } |
66fb9763 FB |
1377 | if (q != &k->info) |
1378 | free_sigqueue(q); | |
1379 | } | |
31e31b8a FB |
1380 | |
1381 |