root / linux-user / signal.c @ d3c61721
History | View | Annotate | Download (48.1 kB)
1 |
/*
|
---|---|
2 |
* Emulation of Linux signals
|
3 |
*
|
4 |
* Copyright (c) 2003 Fabrice Bellard
|
5 |
*
|
6 |
* This program is free software; you can redistribute it and/or modify
|
7 |
* it under the terms of the GNU General Public License as published by
|
8 |
* the Free Software Foundation; either version 2 of the License, or
|
9 |
* (at your option) any later version.
|
10 |
*
|
11 |
* This program is distributed in the hope that it will be useful,
|
12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
14 |
* GNU General Public License for more details.
|
15 |
*
|
16 |
* You should have received a copy of the GNU General Public License
|
17 |
* along with this program; if not, write to the Free Software
|
18 |
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
19 |
*/
|
20 |
#include <stdlib.h> |
21 |
#include <stdio.h> |
22 |
#include <string.h> |
23 |
#include <stdarg.h> |
24 |
#include <unistd.h> |
25 |
#include <signal.h> |
26 |
#include <errno.h> |
27 |
#include <sys/ucontext.h> |
28 |
|
29 |
#ifdef __ia64__
|
30 |
#undef uc_mcontext
|
31 |
#undef uc_sigmask
|
32 |
#undef uc_stack
|
33 |
#undef uc_link
|
34 |
#endif
|
35 |
|
36 |
#include "qemu.h" |
37 |
|
38 |
//#define DEBUG_SIGNAL
|
39 |
|
40 |
#define MAX_SIGQUEUE_SIZE 1024 |
41 |
|
42 |
struct sigqueue {
|
43 |
struct sigqueue *next;
|
44 |
target_siginfo_t info; |
45 |
}; |
46 |
|
47 |
struct emulated_sigaction {
|
48 |
struct target_sigaction sa;
|
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 */
|
53 |
}; |
54 |
|
55 |
static struct emulated_sigaction sigact_table[TARGET_NSIG]; |
56 |
static struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */ |
57 |
static struct sigqueue *first_free; /* first free siginfo queue entry */ |
58 |
static int signal_pending; /* non zero if a signal may be pending */ |
59 |
|
60 |
static void host_signal_handler(int host_signum, siginfo_t *info, |
61 |
void *puc);
|
62 |
|
63 |
static uint8_t host_to_target_signal_table[65] = { |
64 |
[SIGHUP] = TARGET_SIGHUP, |
65 |
[SIGINT] = TARGET_SIGINT, |
66 |
[SIGQUIT] = TARGET_SIGQUIT, |
67 |
[SIGILL] = TARGET_SIGILL, |
68 |
[SIGTRAP] = TARGET_SIGTRAP, |
69 |
[SIGABRT] = TARGET_SIGABRT, |
70 |
/* [SIGIOT] = TARGET_SIGIOT,*/
|
71 |
[SIGBUS] = TARGET_SIGBUS, |
72 |
[SIGFPE] = TARGET_SIGFPE, |
73 |
[SIGKILL] = TARGET_SIGKILL, |
74 |
[SIGUSR1] = TARGET_SIGUSR1, |
75 |
[SIGSEGV] = TARGET_SIGSEGV, |
76 |
[SIGUSR2] = TARGET_SIGUSR2, |
77 |
[SIGPIPE] = TARGET_SIGPIPE, |
78 |
[SIGALRM] = TARGET_SIGALRM, |
79 |
[SIGTERM] = TARGET_SIGTERM, |
80 |
#ifdef SIGSTKFLT
|
81 |
[SIGSTKFLT] = TARGET_SIGSTKFLT, |
82 |
#endif
|
83 |
[SIGCHLD] = TARGET_SIGCHLD, |
84 |
[SIGCONT] = TARGET_SIGCONT, |
85 |
[SIGSTOP] = TARGET_SIGSTOP, |
86 |
[SIGTSTP] = TARGET_SIGTSTP, |
87 |
[SIGTTIN] = TARGET_SIGTTIN, |
88 |
[SIGTTOU] = TARGET_SIGTTOU, |
89 |
[SIGURG] = TARGET_SIGURG, |
90 |
[SIGXCPU] = TARGET_SIGXCPU, |
91 |
[SIGXFSZ] = TARGET_SIGXFSZ, |
92 |
[SIGVTALRM] = TARGET_SIGVTALRM, |
93 |
[SIGPROF] = TARGET_SIGPROF, |
94 |
[SIGWINCH] = TARGET_SIGWINCH, |
95 |
[SIGIO] = TARGET_SIGIO, |
96 |
[SIGPWR] = TARGET_SIGPWR, |
97 |
[SIGSYS] = TARGET_SIGSYS, |
98 |
/* next signals stay the same */
|
99 |
}; |
100 |
static uint8_t target_to_host_signal_table[65]; |
101 |
|
102 |
static inline int host_to_target_signal(int sig) |
103 |
{ |
104 |
return host_to_target_signal_table[sig];
|
105 |
} |
106 |
|
107 |
static inline int target_to_host_signal(int sig) |
108 |
{ |
109 |
return target_to_host_signal_table[sig];
|
110 |
} |
111 |
|
112 |
static void host_to_target_sigset_internal(target_sigset_t *d, |
113 |
const sigset_t *s)
|
114 |
{ |
115 |
int i;
|
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 |
126 |
d->sig[0] = target_sigmask;
|
127 |
for(i = 1;i < TARGET_NSIG_WORDS; i++) { |
128 |
d->sig[i] = ((unsigned long *)s)[i]; |
129 |
} |
130 |
#elif TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2 |
131 |
d->sig[0] = target_sigmask;
|
132 |
d->sig[1] = sigmask >> 32; |
133 |
#else
|
134 |
#error host_to_target_sigset
|
135 |
#endif
|
136 |
} |
137 |
|
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) |
149 |
{ |
150 |
int i;
|
151 |
unsigned long sigmask; |
152 |
target_ulong target_sigmask; |
153 |
|
154 |
target_sigmask = s->sig[0];
|
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++) { |
163 |
((unsigned long *)d)[i] = s->sig[i]; |
164 |
} |
165 |
#elif TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2 |
166 |
((unsigned long *)d)[0] = sigmask | ((unsigned long)(s->sig[1]) << 32); |
167 |
#else
|
168 |
#error target_to_host_sigset
|
169 |
#endif /* TARGET_LONG_BITS */ |
170 |
} |
171 |
|
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 |
|
182 |
void host_to_target_old_sigset(target_ulong *old_sigset,
|
183 |
const sigset_t *sigset)
|
184 |
{ |
185 |
target_sigset_t d; |
186 |
host_to_target_sigset(&d, sigset); |
187 |
*old_sigset = d.sig[0];
|
188 |
} |
189 |
|
190 |
void target_to_host_old_sigset(sigset_t *sigset,
|
191 |
const target_ulong *old_sigset)
|
192 |
{ |
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); |
200 |
} |
201 |
|
202 |
/* siginfo conversion */
|
203 |
|
204 |
static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo, |
205 |
const siginfo_t *info)
|
206 |
{ |
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;
|
212 |
if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
|
213 |
sig == SIGBUS || sig == SIGTRAP) { |
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); |
232 |
tinfo->si_errno = tswap32(info->si_errno); |
233 |
tinfo->si_code = tswap32(info->si_code); |
234 |
if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
|
235 |
sig == SIGBUS || sig == SIGTRAP) { |
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); |
251 |
} |
252 |
|
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) |
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); |
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);
|
264 |
} |
265 |
|
266 |
void signal_init(void) |
267 |
{ |
268 |
struct sigaction act;
|
269 |
int i, j;
|
270 |
|
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 |
|
281 |
/* set all host signal handlers. ALL signals are blocked during
|
282 |
the handlers to serialize them. */
|
283 |
sigfillset(&act.sa_mask); |
284 |
act.sa_flags = SA_SIGINFO; |
285 |
act.sa_sigaction = host_signal_handler; |
286 |
for(i = 1; i < NSIG; i++) { |
287 |
sigaction(i, &act, NULL);
|
288 |
} |
289 |
|
290 |
memset(sigact_table, 0, sizeof(sigact_table)); |
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;
|
307 |
} |
308 |
|
309 |
static inline void free_sigqueue(struct sigqueue *q) |
310 |
{ |
311 |
q->next = first_free; |
312 |
first_free = q; |
313 |
} |
314 |
|
315 |
/* abort execution with signal */
|
316 |
void __attribute((noreturn)) force_sig(int sig) |
317 |
{ |
318 |
int host_sig;
|
319 |
host_sig = target_to_host_signal(sig); |
320 |
fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
|
321 |
sig, strsignal(host_sig)); |
322 |
#if 1 |
323 |
_exit(-host_sig); |
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
|
334 |
} |
335 |
|
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) |
339 |
{ |
340 |
struct emulated_sigaction *k;
|
341 |
struct sigqueue *q, **pq;
|
342 |
target_ulong handler; |
343 |
|
344 |
#if defined(DEBUG_SIGNAL)
|
345 |
fprintf(stderr, "queue_signal: sig=%d\n",
|
346 |
sig); |
347 |
#endif
|
348 |
k = &sigact_table[sig - 1];
|
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); |
356 |
} else {
|
357 |
return 0; /* indicate ignored */ |
358 |
} |
359 |
} else if (handler == TARGET_SIG_IGN) { |
360 |
/* ignore signal */
|
361 |
return 0; |
362 |
} else if (handler == TARGET_SIG_ERR) { |
363 |
force_sig(sig); |
364 |
} else {
|
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 |
|
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 */
|
402 |
if (host_signum == SIGSEGV || host_signum == SIGBUS
|
403 |
#if defined(TARGET_I386) && defined(USE_CODE_COPY)
|
404 |
|| host_signum == SIGFPE |
405 |
#endif
|
406 |
) { |
407 |
if (cpu_signal_handler(host_signum, info, puc))
|
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)
|
416 |
fprintf(stderr, "qemu: got signal %d\n", sig);
|
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 */
|
421 |
cpu_interrupt(global_env, CPU_INTERRUPT_EXIT); |
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;
|
429 |
struct sigaction act1;
|
430 |
int host_sig;
|
431 |
|
432 |
if (sig < 1 || sig > TARGET_NSIG) |
433 |
return -EINVAL;
|
434 |
k = &sigact_table[sig - 1];
|
435 |
#if defined(DEBUG_SIGNAL)
|
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; |
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 |
} |
470 |
} |
471 |
return 0; |
472 |
} |
473 |
|
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 |
|
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 |
|
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 |
|
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); |
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); |
612 |
err |= __put_user(env->exception_index, &sc->trapno); |
613 |
err |= __put_user(env->error_code, &sc->err); |
614 |
err |= __put_user(env->eip, &sc->eip); |
615 |
err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); |
616 |
err |= __put_user(env->eflags, &sc->eflags); |
617 |
err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal); |
618 |
err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); |
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 |
|
625 |
/* non-iBCS2 extensions.. */
|
626 |
err |= __put_user(mask, &sc->oldmask); |
627 |
err |= __put_user(env->cr[2], &sc->cr2);
|
628 |
return err;
|
629 |
} |
630 |
|
631 |
/*
|
632 |
* Determine which stack to use..
|
633 |
*/
|
634 |
|
635 |
static inline void * |
636 |
get_sigframe(struct emulated_sigaction *ka, CPUX86State *env, size_t frame_size)
|
637 |
{ |
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. */
|
650 |
else
|
651 |
#endif
|
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); |
658 |
} |
659 |
|
660 |
static void setup_frame(int sig, struct emulated_sigaction *ka, |
661 |
target_sigset_t *set, CPUX86State *env) |
662 |
{ |
663 |
struct sigframe *frame;
|
664 |
int i, err = 0; |
665 |
|
666 |
frame = get_sigframe(ka, env, sizeof(*frame));
|
667 |
|
668 |
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) |
669 |
goto give_sigsegv;
|
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 |
|
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 |
} |
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 |
|
721 |
static void setup_rt_frame(int sig, struct emulated_sigaction *ka, |
722 |
target_siginfo_t *info, |
723 |
target_sigset_t *set, CPUX86State *env) |
724 |
{ |
725 |
struct rt_sigframe *frame;
|
726 |
int i, err = 0; |
727 |
|
728 |
frame = get_sigframe(ka, env, sizeof(*frame));
|
729 |
|
730 |
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) |
731 |
goto give_sigsegv;
|
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;
|
744 |
|
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]);
|
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 |
} |
758 |
|
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 |
|
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 |
|
821 |
{ |
822 |
struct _fpstate * buf;
|
823 |
buf = (void *)ldl(&sc->fpstate);
|
824 |
if (buf) {
|
825 |
#if 0
|
826 |
if (verify_area(VERIFY_READ, buf, sizeof(*buf)))
|
827 |
goto badframe;
|
828 |
#endif
|
829 |
cpu_x86_frstor(env, (void *)buf, 1); |
830 |
} |
831 |
} |
832 |
|
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 |
|
848 |
#if defined(DEBUG_SIGNAL)
|
849 |
fprintf(stderr, "do_sigreturn\n");
|
850 |
#endif
|
851 |
/* set blocked signals */
|
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 |
} |
858 |
|
859 |
target_to_host_sigset_internal(&set, &target_set); |
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); |
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
|
883 |
target_to_host_sigset(&set, &frame->uc.uc_sigmask); |
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 |
|
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)); |
1107 |
int i, err = 0; |
1108 |
|
1109 |
err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]); |
1110 |
|
1111 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1112 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
1113 |
return;
|
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)); |
1126 |
int i, err = 0; |
1127 |
|
1128 |
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) |
1129 |
return /* 1 */; |
1130 |
|
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]);
|
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 |
} |
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; |
1196 |
int i;
|
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
|
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 |
} |
1218 |
|
1219 |
target_to_host_sigset_internal(&host_set, &set); |
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;
|
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
|
1256 |
target_to_host_sigset(&host_set, &frame->uc.uc_sigmask); |
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 |
|
1274 |
#elif defined(TARGET_SPARC)
|
1275 |
|
1276 |
#define __SUNOS_MAXWIN 31 |
1277 |
|
1278 |
/* This is what SunOS does, so shall I. */
|
1279 |
struct target_sigcontext {
|
1280 |
target_ulong sigc_onstack; /* state to restore */
|
1281 |
|
1282 |
target_ulong sigc_mask; /* sigmask to restore */
|
1283 |
target_ulong sigc_sp; /* stack pointer */
|
1284 |
target_ulong sigc_pc; /* program counter */
|
1285 |
target_ulong sigc_npc; /* next program counter */
|
1286 |
target_ulong sigc_psr; /* for condition codes etc */
|
1287 |
target_ulong sigc_g1; /* User uses these two registers */
|
1288 |
target_ulong sigc_o0; /* within the trampoline code. */
|
1289 |
|
1290 |
/* Now comes information regarding the users window set
|
1291 |
* at the time of the signal.
|
1292 |
*/
|
1293 |
target_ulong sigc_oswins; /* outstanding windows */
|
1294 |
|
1295 |
/* stack ptrs for each regwin buf */
|
1296 |
char *sigc_spbuf[__SUNOS_MAXWIN];
|
1297 |
|
1298 |
/* Windows to restore after signal */
|
1299 |
struct {
|
1300 |
target_ulong locals[8];
|
1301 |
target_ulong ins[8];
|
1302 |
} sigc_wbuf[__SUNOS_MAXWIN]; |
1303 |
}; |
1304 |
/* A Sparc stack frame */
|
1305 |
struct sparc_stackf {
|
1306 |
target_ulong locals[8];
|
1307 |
target_ulong ins[6];
|
1308 |
struct sparc_stackf *fp;
|
1309 |
target_ulong callers_pc; |
1310 |
char *structptr;
|
1311 |
target_ulong xargs[6];
|
1312 |
target_ulong xxargs[1];
|
1313 |
}; |
1314 |
|
1315 |
typedef struct { |
1316 |
struct {
|
1317 |
target_ulong psr; |
1318 |
target_ulong pc; |
1319 |
target_ulong npc; |
1320 |
target_ulong y; |
1321 |
target_ulong u_regs[16]; /* globals and ins */ |
1322 |
} si_regs; |
1323 |
int si_mask;
|
1324 |
} __siginfo_t; |
1325 |
|
1326 |
typedef struct { |
1327 |
unsigned long si_float_regs [32]; |
1328 |
unsigned long si_fsr; |
1329 |
unsigned long si_fpqdepth; |
1330 |
struct {
|
1331 |
unsigned long *insn_addr; |
1332 |
unsigned long insn; |
1333 |
} si_fpqueue [16];
|
1334 |
} __siginfo_fpu_t; |
1335 |
|
1336 |
|
1337 |
struct target_signal_frame {
|
1338 |
struct sparc_stackf ss;
|
1339 |
__siginfo_t info; |
1340 |
__siginfo_fpu_t *fpu_save; |
1341 |
target_ulong insns[2] __attribute__ ((aligned (8))); |
1342 |
target_ulong extramask[TARGET_NSIG_WORDS - 1];
|
1343 |
target_ulong extra_size; /* Should be 0 */
|
1344 |
__siginfo_fpu_t fpu_state; |
1345 |
}; |
1346 |
struct target_rt_signal_frame {
|
1347 |
struct sparc_stackf ss;
|
1348 |
siginfo_t info; |
1349 |
target_ulong regs[20];
|
1350 |
sigset_t mask; |
1351 |
__siginfo_fpu_t *fpu_save; |
1352 |
unsigned int insns[2]; |
1353 |
stack_t stack; |
1354 |
unsigned int extra_size; /* Should be 0 */ |
1355 |
__siginfo_fpu_t fpu_state; |
1356 |
}; |
1357 |
|
1358 |
#define UREG_O0 16 |
1359 |
#define UREG_O6 22 |
1360 |
#define UREG_I0 0 |
1361 |
#define UREG_I1 1 |
1362 |
#define UREG_I2 2 |
1363 |
#define UREG_I6 6 |
1364 |
#define UREG_I7 7 |
1365 |
#define UREG_L0 8 |
1366 |
#define UREG_FP UREG_I6
|
1367 |
#define UREG_SP UREG_O6
|
1368 |
|
1369 |
static inline void *get_sigframe(struct emulated_sigaction *sa, CPUState *env, unsigned long framesize) |
1370 |
{ |
1371 |
unsigned long sp; |
1372 |
|
1373 |
sp = env->regwptr[UREG_FP]; |
1374 |
#if 0
|
1375 |
|
1376 |
/* This is the X/Open sanctioned signal stack switching. */
|
1377 |
if (sa->sa_flags & TARGET_SA_ONSTACK) {
|
1378 |
if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7))
|
1379 |
sp = current->sas_ss_sp + current->sas_ss_size;
|
1380 |
}
|
1381 |
#endif
|
1382 |
return (void *)(sp - framesize); |
1383 |
} |
1384 |
|
1385 |
static int |
1386 |
setup___siginfo(__siginfo_t *si, CPUState *env, target_ulong mask) |
1387 |
{ |
1388 |
int err = 0, i; |
1389 |
|
1390 |
err |= __put_user(env->psr, &si->si_regs.psr); |
1391 |
err |= __put_user(env->pc, &si->si_regs.pc); |
1392 |
err |= __put_user(env->npc, &si->si_regs.npc); |
1393 |
err |= __put_user(env->y, &si->si_regs.y); |
1394 |
for (i=0; i < 7; i++) { |
1395 |
err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]); |
1396 |
} |
1397 |
for (i=0; i < 7; i++) { |
1398 |
err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
|
1399 |
} |
1400 |
err |= __put_user(mask, &si->si_mask); |
1401 |
return err;
|
1402 |
} |
1403 |
|
1404 |
#if 0
|
1405 |
static int
|
1406 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
|
1407 |
CPUState *env, unsigned long mask)
|
1408 |
{
|
1409 |
int err = 0;
|
1410 |
|
1411 |
err |= __put_user(mask, &sc->sigc_mask);
|
1412 |
err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
|
1413 |
err |= __put_user(env->pc, &sc->sigc_pc);
|
1414 |
err |= __put_user(env->npc, &sc->sigc_npc);
|
1415 |
err |= __put_user(env->psr, &sc->sigc_psr);
|
1416 |
err |= __put_user(env->gregs[1], &sc->sigc_g1);
|
1417 |
err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
|
1418 |
|
1419 |
return err;
|
1420 |
}
|
1421 |
#endif
|
1422 |
#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) |
1423 |
|
1424 |
static void setup_frame(int sig, struct emulated_sigaction *ka, |
1425 |
target_sigset_t *set, CPUState *env) |
1426 |
{ |
1427 |
struct target_signal_frame *sf;
|
1428 |
int sigframe_size, err, i;
|
1429 |
|
1430 |
/* 1. Make sure everything is clean */
|
1431 |
//synchronize_user_stack();
|
1432 |
|
1433 |
sigframe_size = NF_ALIGNEDSZ; |
1434 |
|
1435 |
sf = (struct target_signal_frame *)
|
1436 |
get_sigframe(ka, env, sigframe_size); |
1437 |
|
1438 |
//fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
1439 |
#if 0
|
1440 |
if (invalid_frame_pointer(sf, sigframe_size))
|
1441 |
goto sigill_and_return;
|
1442 |
#endif
|
1443 |
/* 2. Save the current process state */
|
1444 |
err = setup___siginfo(&sf->info, env, set->sig[0]);
|
1445 |
err |= __put_user(0, &sf->extra_size);
|
1446 |
|
1447 |
//err |= save_fpu_state(regs, &sf->fpu_state);
|
1448 |
//err |= __put_user(&sf->fpu_state, &sf->fpu_save);
|
1449 |
|
1450 |
err |= __put_user(set->sig[0], &sf->info.si_mask);
|
1451 |
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { |
1452 |
err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
|
1453 |
} |
1454 |
|
1455 |
for (i = 0; i < 7; i++) { |
1456 |
err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); |
1457 |
} |
1458 |
for (i = 0; i < 7; i++) { |
1459 |
err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); |
1460 |
} |
1461 |
if (err)
|
1462 |
goto sigsegv;
|
1463 |
|
1464 |
/* 3. signal handler back-trampoline and parameters */
|
1465 |
env->regwptr[UREG_FP] = (target_ulong) sf; |
1466 |
env->regwptr[UREG_I0] = sig; |
1467 |
env->regwptr[UREG_I1] = (target_ulong) &sf->info; |
1468 |
env->regwptr[UREG_I2] = (target_ulong) &sf->info; |
1469 |
|
1470 |
/* 4. signal handler */
|
1471 |
env->pc = (unsigned long) ka->sa._sa_handler; |
1472 |
env->npc = (env->pc + 4);
|
1473 |
/* 5. return to kernel instructions */
|
1474 |
if (ka->sa.sa_restorer)
|
1475 |
env->regwptr[UREG_I7] = (unsigned long)ka->sa.sa_restorer; |
1476 |
else {
|
1477 |
env->regwptr[UREG_I7] = (unsigned long)(&(sf->insns[0]) - 2); |
1478 |
|
1479 |
/* mov __NR_sigreturn, %g1 */
|
1480 |
err |= __put_user(0x821020d8, &sf->insns[0]); |
1481 |
|
1482 |
/* t 0x10 */
|
1483 |
err |= __put_user(0x91d02010, &sf->insns[1]); |
1484 |
if (err)
|
1485 |
goto sigsegv;
|
1486 |
|
1487 |
/* Flush instruction space. */
|
1488 |
//flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
|
1489 |
// tb_flush(env);
|
1490 |
} |
1491 |
//cpu_dump_state(env, stderr, fprintf, 0);
|
1492 |
return;
|
1493 |
|
1494 |
//sigill_and_return:
|
1495 |
force_sig(TARGET_SIGILL); |
1496 |
sigsegv:
|
1497 |
//fprintf(stderr, "force_sig\n");
|
1498 |
force_sig(TARGET_SIGSEGV); |
1499 |
} |
1500 |
static inline int |
1501 |
restore_fpu_state(CPUState *env, __siginfo_fpu_t *fpu) |
1502 |
{ |
1503 |
int err;
|
1504 |
#if 0
|
1505 |
#ifdef CONFIG_SMP
|
1506 |
if (current->flags & PF_USEDFPU)
|
1507 |
regs->psr &= ~PSR_EF;
|
1508 |
#else
|
1509 |
if (current == last_task_used_math) {
|
1510 |
last_task_used_math = 0;
|
1511 |
regs->psr &= ~PSR_EF; |
1512 |
} |
1513 |
#endif
|
1514 |
current->used_math = 1;
|
1515 |
current->flags &= ~PF_USEDFPU; |
1516 |
#endif
|
1517 |
#if 0
|
1518 |
if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
|
1519 |
return -EFAULT;
|
1520 |
#endif
|
1521 |
|
1522 |
err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0], |
1523 |
(sizeof(unsigned long) * 32)); |
1524 |
err |= __get_user(env->fsr, &fpu->si_fsr); |
1525 |
#if 0
|
1526 |
err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
|
1527 |
if (current->thread.fpqdepth != 0)
|
1528 |
err |= __copy_from_user(¤t->thread.fpqueue[0],
|
1529 |
&fpu->si_fpqueue[0],
|
1530 |
((sizeof(unsigned long) +
|
1531 |
(sizeof(unsigned long *)))*16));
|
1532 |
#endif
|
1533 |
return err;
|
1534 |
} |
1535 |
|
1536 |
|
1537 |
static void setup_rt_frame(int sig, struct emulated_sigaction *ka, |
1538 |
target_siginfo_t *info, |
1539 |
target_sigset_t *set, CPUState *env) |
1540 |
{ |
1541 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
1542 |
} |
1543 |
|
1544 |
long do_sigreturn(CPUState *env)
|
1545 |
{ |
1546 |
struct target_signal_frame *sf;
|
1547 |
uint32_t up_psr, pc, npc; |
1548 |
target_sigset_t set; |
1549 |
sigset_t host_set; |
1550 |
target_ulong fpu_save; |
1551 |
int err, i;
|
1552 |
|
1553 |
sf = (struct target_signal_frame *) env->regwptr[UREG_FP];
|
1554 |
#if 0
|
1555 |
fprintf(stderr, "sigreturn\n");
|
1556 |
fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
1557 |
#endif
|
1558 |
//cpu_dump_state(env, stderr, fprintf, 0);
|
1559 |
|
1560 |
/* 1. Make sure we are not getting garbage from the user */
|
1561 |
#if 0
|
1562 |
if (verify_area (VERIFY_READ, sf, sizeof (*sf)))
|
1563 |
goto segv_and_exit;
|
1564 |
#endif
|
1565 |
|
1566 |
if (((uint) sf) & 3) |
1567 |
goto segv_and_exit;
|
1568 |
|
1569 |
err = __get_user(pc, &sf->info.si_regs.pc); |
1570 |
err |= __get_user(npc, &sf->info.si_regs.npc); |
1571 |
|
1572 |
// fprintf(stderr, "pc: %lx npc %lx\n", pc, npc);
|
1573 |
if ((pc | npc) & 3) |
1574 |
goto segv_and_exit;
|
1575 |
|
1576 |
/* 2. Restore the state */
|
1577 |
err |= __get_user(up_psr, &sf->info.si_regs.psr); |
1578 |
|
1579 |
/* User can only change condition codes and FPU enabling in %psr. */
|
1580 |
env->psr = (up_psr & ~(PSR_ICC /* | PSR_EF */))
|
1581 |
| (env->psr & (PSR_ICC /* | PSR_EF */));
|
1582 |
fprintf(stderr, "psr: %x\n", env->psr);
|
1583 |
env->pc = pc-4;
|
1584 |
env->npc = pc; |
1585 |
err |= __get_user(env->y, &sf->info.si_regs.y); |
1586 |
for (i=0; i < 7; i++) { |
1587 |
err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); |
1588 |
} |
1589 |
for (i=0; i < 7; i++) { |
1590 |
err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
|
1591 |
} |
1592 |
|
1593 |
err |= __get_user(fpu_save, (target_ulong *)&sf->fpu_save); |
1594 |
|
1595 |
//if (fpu_save)
|
1596 |
// err |= restore_fpu_state(env, fpu_save);
|
1597 |
|
1598 |
/* This is pretty much atomic, no amount locking would prevent
|
1599 |
* the races which exist anyways.
|
1600 |
*/
|
1601 |
err |= __get_user(set.sig[0], &sf->info.si_mask);
|
1602 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1603 |
err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
|
1604 |
} |
1605 |
|
1606 |
target_to_host_sigset_internal(&host_set, &set); |
1607 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1608 |
|
1609 |
if (err)
|
1610 |
goto segv_and_exit;
|
1611 |
|
1612 |
// fprintf(stderr, "returning %lx\n", env->regwptr[0]);
|
1613 |
return env->regwptr[0]; |
1614 |
|
1615 |
segv_and_exit:
|
1616 |
force_sig(TARGET_SIGSEGV); |
1617 |
} |
1618 |
|
1619 |
long do_rt_sigreturn(CPUState *env)
|
1620 |
{ |
1621 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
1622 |
return -ENOSYS;
|
1623 |
} |
1624 |
|
1625 |
|
1626 |
#else
|
1627 |
|
1628 |
static void setup_frame(int sig, struct emulated_sigaction *ka, |
1629 |
target_sigset_t *set, CPUState *env) |
1630 |
{ |
1631 |
fprintf(stderr, "setup_frame: not implemented\n");
|
1632 |
} |
1633 |
|
1634 |
static void setup_rt_frame(int sig, struct emulated_sigaction *ka, |
1635 |
target_siginfo_t *info, |
1636 |
target_sigset_t *set, CPUState *env) |
1637 |
{ |
1638 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
1639 |
} |
1640 |
|
1641 |
long do_sigreturn(CPUState *env)
|
1642 |
{ |
1643 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
1644 |
return -ENOSYS;
|
1645 |
} |
1646 |
|
1647 |
long do_rt_sigreturn(CPUState *env)
|
1648 |
{ |
1649 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
1650 |
return -ENOSYS;
|
1651 |
} |
1652 |
|
1653 |
#endif
|
1654 |
|
1655 |
void process_pending_signals(void *cpu_env) |
1656 |
{ |
1657 |
int sig;
|
1658 |
target_ulong handler; |
1659 |
sigset_t set, old_set; |
1660 |
target_sigset_t target_old_set; |
1661 |
struct emulated_sigaction *k;
|
1662 |
struct sigqueue *q;
|
1663 |
|
1664 |
if (!signal_pending)
|
1665 |
return;
|
1666 |
|
1667 |
k = sigact_table; |
1668 |
for(sig = 1; sig <= TARGET_NSIG; sig++) { |
1669 |
if (k->pending)
|
1670 |
goto handle_signal;
|
1671 |
k++; |
1672 |
} |
1673 |
/* if no signal is pending, just return */
|
1674 |
signal_pending = 0;
|
1675 |
return;
|
1676 |
|
1677 |
handle_signal:
|
1678 |
#ifdef DEBUG_SIGNAL
|
1679 |
fprintf(stderr, "qemu: process signal %d\n", sig);
|
1680 |
#endif
|
1681 |
/* dequeue signal */
|
1682 |
q = k->first; |
1683 |
k->first = q->next; |
1684 |
if (!k->first)
|
1685 |
k->pending = 0;
|
1686 |
|
1687 |
handler = k->sa._sa_handler; |
1688 |
if (handler == TARGET_SIG_DFL) {
|
1689 |
/* default handler : ignore some signal. The other are fatal */
|
1690 |
if (sig != TARGET_SIGCHLD &&
|
1691 |
sig != TARGET_SIGURG && |
1692 |
sig != TARGET_SIGWINCH) { |
1693 |
force_sig(sig); |
1694 |
} |
1695 |
} else if (handler == TARGET_SIG_IGN) { |
1696 |
/* ignore sig */
|
1697 |
} else if (handler == TARGET_SIG_ERR) { |
1698 |
force_sig(sig); |
1699 |
} else {
|
1700 |
/* compute the blocked signals during the handler execution */
|
1701 |
target_to_host_sigset(&set, &k->sa.sa_mask); |
1702 |
/* SA_NODEFER indicates that the current signal should not be
|
1703 |
blocked during the handler */
|
1704 |
if (!(k->sa.sa_flags & TARGET_SA_NODEFER))
|
1705 |
sigaddset(&set, target_to_host_signal(sig)); |
1706 |
|
1707 |
/* block signals in the handler using Linux */
|
1708 |
sigprocmask(SIG_BLOCK, &set, &old_set); |
1709 |
/* save the previous blocked signal state to restore it at the
|
1710 |
end of the signal execution (see do_sigreturn) */
|
1711 |
host_to_target_sigset_internal(&target_old_set, &old_set); |
1712 |
|
1713 |
/* if the CPU is in VM86 mode, we restore the 32 bit values */
|
1714 |
#ifdef TARGET_I386
|
1715 |
{ |
1716 |
CPUX86State *env = cpu_env; |
1717 |
if (env->eflags & VM_MASK)
|
1718 |
save_v86_state(env); |
1719 |
} |
1720 |
#endif
|
1721 |
/* prepare the stack frame of the virtual CPU */
|
1722 |
if (k->sa.sa_flags & TARGET_SA_SIGINFO)
|
1723 |
setup_rt_frame(sig, k, &q->info, &target_old_set, cpu_env); |
1724 |
else
|
1725 |
setup_frame(sig, k, &target_old_set, cpu_env); |
1726 |
if (k->sa.sa_flags & TARGET_SA_RESETHAND)
|
1727 |
k->sa._sa_handler = TARGET_SIG_DFL; |
1728 |
} |
1729 |
if (q != &k->info)
|
1730 |
free_sigqueue(q); |
1731 |
} |
1732 |
|
1733 |
|