root / linux-user / signal.c @ b2178704
History | View | Annotate | Download (139.9 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, see <http://www.gnu.org/licenses/>.
|
| 18 |
*/
|
| 19 |
#include <stdlib.h> |
| 20 |
#include <stdio.h> |
| 21 |
#include <string.h> |
| 22 |
#include <stdarg.h> |
| 23 |
#include <unistd.h> |
| 24 |
#include <signal.h> |
| 25 |
#include <errno.h> |
| 26 |
#include <assert.h> |
| 27 |
#include <sys/ucontext.h> |
| 28 |
#include <sys/resource.h> |
| 29 |
|
| 30 |
#include "qemu.h" |
| 31 |
#include "qemu-common.h" |
| 32 |
#include "target_signal.h" |
| 33 |
|
| 34 |
//#define DEBUG_SIGNAL
|
| 35 |
|
| 36 |
static struct target_sigaltstack target_sigaltstack_used = { |
| 37 |
.ss_sp = 0,
|
| 38 |
.ss_size = 0,
|
| 39 |
.ss_flags = TARGET_SS_DISABLE, |
| 40 |
}; |
| 41 |
|
| 42 |
static struct target_sigaction sigact_table[TARGET_NSIG]; |
| 43 |
|
| 44 |
static void host_signal_handler(int host_signum, siginfo_t *info, |
| 45 |
void *puc);
|
| 46 |
|
| 47 |
static uint8_t host_to_target_signal_table[_NSIG] = {
|
| 48 |
[SIGHUP] = TARGET_SIGHUP, |
| 49 |
[SIGINT] = TARGET_SIGINT, |
| 50 |
[SIGQUIT] = TARGET_SIGQUIT, |
| 51 |
[SIGILL] = TARGET_SIGILL, |
| 52 |
[SIGTRAP] = TARGET_SIGTRAP, |
| 53 |
[SIGABRT] = TARGET_SIGABRT, |
| 54 |
/* [SIGIOT] = TARGET_SIGIOT,*/
|
| 55 |
[SIGBUS] = TARGET_SIGBUS, |
| 56 |
[SIGFPE] = TARGET_SIGFPE, |
| 57 |
[SIGKILL] = TARGET_SIGKILL, |
| 58 |
[SIGUSR1] = TARGET_SIGUSR1, |
| 59 |
[SIGSEGV] = TARGET_SIGSEGV, |
| 60 |
[SIGUSR2] = TARGET_SIGUSR2, |
| 61 |
[SIGPIPE] = TARGET_SIGPIPE, |
| 62 |
[SIGALRM] = TARGET_SIGALRM, |
| 63 |
[SIGTERM] = TARGET_SIGTERM, |
| 64 |
#ifdef SIGSTKFLT
|
| 65 |
[SIGSTKFLT] = TARGET_SIGSTKFLT, |
| 66 |
#endif
|
| 67 |
[SIGCHLD] = TARGET_SIGCHLD, |
| 68 |
[SIGCONT] = TARGET_SIGCONT, |
| 69 |
[SIGSTOP] = TARGET_SIGSTOP, |
| 70 |
[SIGTSTP] = TARGET_SIGTSTP, |
| 71 |
[SIGTTIN] = TARGET_SIGTTIN, |
| 72 |
[SIGTTOU] = TARGET_SIGTTOU, |
| 73 |
[SIGURG] = TARGET_SIGURG, |
| 74 |
[SIGXCPU] = TARGET_SIGXCPU, |
| 75 |
[SIGXFSZ] = TARGET_SIGXFSZ, |
| 76 |
[SIGVTALRM] = TARGET_SIGVTALRM, |
| 77 |
[SIGPROF] = TARGET_SIGPROF, |
| 78 |
[SIGWINCH] = TARGET_SIGWINCH, |
| 79 |
[SIGIO] = TARGET_SIGIO, |
| 80 |
[SIGPWR] = TARGET_SIGPWR, |
| 81 |
[SIGSYS] = TARGET_SIGSYS, |
| 82 |
/* next signals stay the same */
|
| 83 |
/* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with
|
| 84 |
host libpthread signals. This assumes noone actually uses SIGRTMAX :-/
|
| 85 |
To fix this properly we need to do manual signal delivery multiplexed
|
| 86 |
over a single host signal. */
|
| 87 |
[__SIGRTMIN] = __SIGRTMAX, |
| 88 |
[__SIGRTMAX] = __SIGRTMIN, |
| 89 |
}; |
| 90 |
static uint8_t target_to_host_signal_table[_NSIG];
|
| 91 |
|
| 92 |
static inline int on_sig_stack(unsigned long sp) |
| 93 |
{
|
| 94 |
return (sp - target_sigaltstack_used.ss_sp
|
| 95 |
< target_sigaltstack_used.ss_size); |
| 96 |
} |
| 97 |
|
| 98 |
static inline int sas_ss_flags(unsigned long sp) |
| 99 |
{
|
| 100 |
return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE |
| 101 |
: on_sig_stack(sp) ? SS_ONSTACK : 0);
|
| 102 |
} |
| 103 |
|
| 104 |
int host_to_target_signal(int sig) |
| 105 |
{
|
| 106 |
if (sig >= _NSIG)
|
| 107 |
return sig;
|
| 108 |
return host_to_target_signal_table[sig];
|
| 109 |
} |
| 110 |
|
| 111 |
int target_to_host_signal(int sig) |
| 112 |
{
|
| 113 |
if (sig >= _NSIG)
|
| 114 |
return sig;
|
| 115 |
return target_to_host_signal_table[sig];
|
| 116 |
} |
| 117 |
|
| 118 |
static inline void target_sigemptyset(target_sigset_t *set) |
| 119 |
{
|
| 120 |
memset(set, 0, sizeof(*set)); |
| 121 |
} |
| 122 |
|
| 123 |
static inline void target_sigaddset(target_sigset_t *set, int signum) |
| 124 |
{
|
| 125 |
signum--; |
| 126 |
abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
|
| 127 |
set->sig[signum / TARGET_NSIG_BPW] |= mask; |
| 128 |
} |
| 129 |
|
| 130 |
static inline int target_sigismember(const target_sigset_t *set, int signum) |
| 131 |
{
|
| 132 |
signum--; |
| 133 |
abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW);
|
| 134 |
return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0); |
| 135 |
} |
| 136 |
|
| 137 |
static void host_to_target_sigset_internal(target_sigset_t *d, |
| 138 |
const sigset_t *s)
|
| 139 |
{
|
| 140 |
int i;
|
| 141 |
target_sigemptyset(d); |
| 142 |
for (i = 1; i <= TARGET_NSIG; i++) { |
| 143 |
if (sigismember(s, i)) {
|
| 144 |
target_sigaddset(d, host_to_target_signal(i)); |
| 145 |
} |
| 146 |
} |
| 147 |
} |
| 148 |
|
| 149 |
void host_to_target_sigset(target_sigset_t *d, const sigset_t *s) |
| 150 |
{
|
| 151 |
target_sigset_t d1; |
| 152 |
int i;
|
| 153 |
|
| 154 |
host_to_target_sigset_internal(&d1, s); |
| 155 |
for(i = 0;i < TARGET_NSIG_WORDS; i++) |
| 156 |
d->sig[i] = tswapl(d1.sig[i]); |
| 157 |
} |
| 158 |
|
| 159 |
static void target_to_host_sigset_internal(sigset_t *d, |
| 160 |
const target_sigset_t *s)
|
| 161 |
{
|
| 162 |
int i;
|
| 163 |
sigemptyset(d); |
| 164 |
for (i = 1; i <= TARGET_NSIG; i++) { |
| 165 |
if (target_sigismember(s, i)) {
|
| 166 |
sigaddset(d, target_to_host_signal(i)); |
| 167 |
} |
| 168 |
} |
| 169 |
} |
| 170 |
|
| 171 |
void target_to_host_sigset(sigset_t *d, const target_sigset_t *s) |
| 172 |
{
|
| 173 |
target_sigset_t s1; |
| 174 |
int i;
|
| 175 |
|
| 176 |
for(i = 0;i < TARGET_NSIG_WORDS; i++) |
| 177 |
s1.sig[i] = tswapl(s->sig[i]); |
| 178 |
target_to_host_sigset_internal(d, &s1); |
| 179 |
} |
| 180 |
|
| 181 |
void host_to_target_old_sigset(abi_ulong *old_sigset,
|
| 182 |
const sigset_t *sigset)
|
| 183 |
{
|
| 184 |
target_sigset_t d; |
| 185 |
host_to_target_sigset(&d, sigset); |
| 186 |
*old_sigset = d.sig[0];
|
| 187 |
} |
| 188 |
|
| 189 |
void target_to_host_old_sigset(sigset_t *sigset,
|
| 190 |
const abi_ulong *old_sigset)
|
| 191 |
{
|
| 192 |
target_sigset_t d; |
| 193 |
int i;
|
| 194 |
|
| 195 |
d.sig[0] = *old_sigset;
|
| 196 |
for(i = 1;i < TARGET_NSIG_WORDS; i++) |
| 197 |
d.sig[i] = 0;
|
| 198 |
target_to_host_sigset(sigset, &d); |
| 199 |
} |
| 200 |
|
| 201 |
/* siginfo conversion */
|
| 202 |
|
| 203 |
static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo, |
| 204 |
const siginfo_t *info)
|
| 205 |
{
|
| 206 |
int sig;
|
| 207 |
sig = host_to_target_signal(info->si_signo); |
| 208 |
tinfo->si_signo = sig; |
| 209 |
tinfo->si_errno = 0;
|
| 210 |
tinfo->si_code = info->si_code; |
| 211 |
if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
|
| 212 |
sig == SIGBUS || sig == SIGTRAP) {
|
| 213 |
/* should never come here, but who knows. The information for
|
| 214 |
the target is irrelevant */
|
| 215 |
tinfo->_sifields._sigfault._addr = 0;
|
| 216 |
} else if (sig == SIGIO) { |
| 217 |
tinfo->_sifields._sigpoll._fd = info->si_fd; |
| 218 |
} else if (sig >= TARGET_SIGRTMIN) { |
| 219 |
tinfo->_sifields._rt._pid = info->si_pid; |
| 220 |
tinfo->_sifields._rt._uid = info->si_uid; |
| 221 |
/* XXX: potential problem if 64 bit */
|
| 222 |
tinfo->_sifields._rt._sigval.sival_ptr = |
| 223 |
(abi_ulong)(unsigned long)info->si_value.sival_ptr; |
| 224 |
} |
| 225 |
} |
| 226 |
|
| 227 |
static void tswap_siginfo(target_siginfo_t *tinfo, |
| 228 |
const target_siginfo_t *info)
|
| 229 |
{
|
| 230 |
int sig;
|
| 231 |
sig = info->si_signo; |
| 232 |
tinfo->si_signo = tswap32(sig); |
| 233 |
tinfo->si_errno = tswap32(info->si_errno); |
| 234 |
tinfo->si_code = tswap32(info->si_code); |
| 235 |
if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
|
| 236 |
sig == SIGBUS || sig == SIGTRAP) {
|
| 237 |
tinfo->_sifields._sigfault._addr = |
| 238 |
tswapl(info->_sifields._sigfault._addr); |
| 239 |
} else if (sig == SIGIO) { |
| 240 |
tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd); |
| 241 |
} else if (sig >= TARGET_SIGRTMIN) { |
| 242 |
tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid); |
| 243 |
tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid); |
| 244 |
tinfo->_sifields._rt._sigval.sival_ptr = |
| 245 |
tswapl(info->_sifields._rt._sigval.sival_ptr); |
| 246 |
} |
| 247 |
} |
| 248 |
|
| 249 |
|
| 250 |
void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info) |
| 251 |
{
|
| 252 |
host_to_target_siginfo_noswap(tinfo, info); |
| 253 |
tswap_siginfo(tinfo, tinfo); |
| 254 |
} |
| 255 |
|
| 256 |
/* XXX: we support only POSIX RT signals are used. */
|
| 257 |
/* XXX: find a solution for 64 bit (additional malloced data is needed) */
|
| 258 |
void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo) |
| 259 |
{
|
| 260 |
info->si_signo = tswap32(tinfo->si_signo); |
| 261 |
info->si_errno = tswap32(tinfo->si_errno); |
| 262 |
info->si_code = tswap32(tinfo->si_code); |
| 263 |
info->si_pid = tswap32(tinfo->_sifields._rt._pid); |
| 264 |
info->si_uid = tswap32(tinfo->_sifields._rt._uid); |
| 265 |
info->si_value.sival_ptr = |
| 266 |
(void *)(long)tswapl(tinfo->_sifields._rt._sigval.sival_ptr); |
| 267 |
} |
| 268 |
|
| 269 |
static int fatal_signal (int sig) |
| 270 |
{
|
| 271 |
switch (sig) {
|
| 272 |
case TARGET_SIGCHLD:
|
| 273 |
case TARGET_SIGURG:
|
| 274 |
case TARGET_SIGWINCH:
|
| 275 |
/* Ignored by default. */
|
| 276 |
return 0; |
| 277 |
case TARGET_SIGCONT:
|
| 278 |
case TARGET_SIGSTOP:
|
| 279 |
case TARGET_SIGTSTP:
|
| 280 |
case TARGET_SIGTTIN:
|
| 281 |
case TARGET_SIGTTOU:
|
| 282 |
/* Job control signals. */
|
| 283 |
return 0; |
| 284 |
default:
|
| 285 |
return 1; |
| 286 |
} |
| 287 |
} |
| 288 |
|
| 289 |
/* returns 1 if given signal should dump core if not handled */
|
| 290 |
static int core_dump_signal(int sig) |
| 291 |
{
|
| 292 |
switch (sig) {
|
| 293 |
case TARGET_SIGABRT:
|
| 294 |
case TARGET_SIGFPE:
|
| 295 |
case TARGET_SIGILL:
|
| 296 |
case TARGET_SIGQUIT:
|
| 297 |
case TARGET_SIGSEGV:
|
| 298 |
case TARGET_SIGTRAP:
|
| 299 |
case TARGET_SIGBUS:
|
| 300 |
return (1); |
| 301 |
default:
|
| 302 |
return (0); |
| 303 |
} |
| 304 |
} |
| 305 |
|
| 306 |
void signal_init(void) |
| 307 |
{
|
| 308 |
struct sigaction act;
|
| 309 |
struct sigaction oact;
|
| 310 |
int i, j;
|
| 311 |
int host_sig;
|
| 312 |
|
| 313 |
/* generate signal conversion tables */
|
| 314 |
for(i = 1; i < _NSIG; i++) { |
| 315 |
if (host_to_target_signal_table[i] == 0) |
| 316 |
host_to_target_signal_table[i] = i; |
| 317 |
} |
| 318 |
for(i = 1; i < _NSIG; i++) { |
| 319 |
j = host_to_target_signal_table[i]; |
| 320 |
target_to_host_signal_table[j] = i; |
| 321 |
} |
| 322 |
|
| 323 |
/* set all host signal handlers. ALL signals are blocked during
|
| 324 |
the handlers to serialize them. */
|
| 325 |
memset(sigact_table, 0, sizeof(sigact_table)); |
| 326 |
|
| 327 |
sigfillset(&act.sa_mask); |
| 328 |
act.sa_flags = SA_SIGINFO; |
| 329 |
act.sa_sigaction = host_signal_handler; |
| 330 |
for(i = 1; i <= TARGET_NSIG; i++) { |
| 331 |
host_sig = target_to_host_signal(i); |
| 332 |
sigaction(host_sig, NULL, &oact);
|
| 333 |
if (oact.sa_sigaction == (void *)SIG_IGN) { |
| 334 |
sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN;
|
| 335 |
} else if (oact.sa_sigaction == (void *)SIG_DFL) { |
| 336 |
sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL;
|
| 337 |
} |
| 338 |
/* If there's already a handler installed then something has
|
| 339 |
gone horribly wrong, so don't even try to handle that case. */
|
| 340 |
/* Install some handlers for our own use. We need at least
|
| 341 |
SIGSEGV and SIGBUS, to detect exceptions. We can not just
|
| 342 |
trap all signals because it affects syscall interrupt
|
| 343 |
behavior. But do trap all default-fatal signals. */
|
| 344 |
if (fatal_signal (i))
|
| 345 |
sigaction(host_sig, &act, NULL);
|
| 346 |
} |
| 347 |
} |
| 348 |
|
| 349 |
/* signal queue handling */
|
| 350 |
|
| 351 |
static inline struct sigqueue *alloc_sigqueue(CPUState *env) |
| 352 |
{
|
| 353 |
TaskState *ts = env->opaque; |
| 354 |
struct sigqueue *q = ts->first_free;
|
| 355 |
if (!q)
|
| 356 |
return NULL; |
| 357 |
ts->first_free = q->next; |
| 358 |
return q;
|
| 359 |
} |
| 360 |
|
| 361 |
static inline void free_sigqueue(CPUState *env, struct sigqueue *q) |
| 362 |
{
|
| 363 |
TaskState *ts = env->opaque; |
| 364 |
q->next = ts->first_free; |
| 365 |
ts->first_free = q; |
| 366 |
} |
| 367 |
|
| 368 |
/* abort execution with signal */
|
| 369 |
static void QEMU_NORETURN force_sig(int target_sig) |
| 370 |
{
|
| 371 |
TaskState *ts = (TaskState *)thread_env->opaque; |
| 372 |
int host_sig, core_dumped = 0; |
| 373 |
struct sigaction act;
|
| 374 |
host_sig = target_to_host_signal(target_sig); |
| 375 |
gdb_signalled(thread_env, target_sig); |
| 376 |
|
| 377 |
/* dump core if supported by target binary format */
|
| 378 |
if (core_dump_signal(target_sig) && (ts->bprm->core_dump != NULL)) { |
| 379 |
stop_all_tasks(); |
| 380 |
core_dumped = |
| 381 |
((*ts->bprm->core_dump)(target_sig, thread_env) == 0);
|
| 382 |
} |
| 383 |
if (core_dumped) {
|
| 384 |
/* we already dumped the core of target process, we don't want
|
| 385 |
* a coredump of qemu itself */
|
| 386 |
struct rlimit nodump;
|
| 387 |
getrlimit(RLIMIT_CORE, &nodump); |
| 388 |
nodump.rlim_cur=0;
|
| 389 |
setrlimit(RLIMIT_CORE, &nodump); |
| 390 |
(void) fprintf(stderr, "qemu: uncaught target signal %d (%s) - %s\n", |
| 391 |
target_sig, strsignal(host_sig), "core dumped" );
|
| 392 |
} |
| 393 |
|
| 394 |
/* The proper exit code for dieing from an uncaught signal is
|
| 395 |
* -<signal>. The kernel doesn't allow exit() or _exit() to pass
|
| 396 |
* a negative value. To get the proper exit code we need to
|
| 397 |
* actually die from an uncaught signal. Here the default signal
|
| 398 |
* handler is installed, we send ourself a signal and we wait for
|
| 399 |
* it to arrive. */
|
| 400 |
sigfillset(&act.sa_mask); |
| 401 |
act.sa_handler = SIG_DFL; |
| 402 |
sigaction(host_sig, &act, NULL);
|
| 403 |
|
| 404 |
/* For some reason raise(host_sig) doesn't send the signal when
|
| 405 |
* statically linked on x86-64. */
|
| 406 |
kill(getpid(), host_sig); |
| 407 |
|
| 408 |
/* Make sure the signal isn't masked (just reuse the mask inside
|
| 409 |
of act) */
|
| 410 |
sigdelset(&act.sa_mask, host_sig); |
| 411 |
sigsuspend(&act.sa_mask); |
| 412 |
|
| 413 |
/* unreachable */
|
| 414 |
abort(); |
| 415 |
} |
| 416 |
|
| 417 |
/* queue a signal so that it will be send to the virtual CPU as soon
|
| 418 |
as possible */
|
| 419 |
int queue_signal(CPUState *env, int sig, target_siginfo_t *info) |
| 420 |
{
|
| 421 |
TaskState *ts = env->opaque; |
| 422 |
struct emulated_sigtable *k;
|
| 423 |
struct sigqueue *q, **pq;
|
| 424 |
abi_ulong handler; |
| 425 |
int queue;
|
| 426 |
|
| 427 |
#if defined(DEBUG_SIGNAL)
|
| 428 |
fprintf(stderr, "queue_signal: sig=%d\n",
|
| 429 |
sig); |
| 430 |
#endif
|
| 431 |
k = &ts->sigtab[sig - 1];
|
| 432 |
queue = gdb_queuesig (); |
| 433 |
handler = sigact_table[sig - 1]._sa_handler;
|
| 434 |
if (!queue && handler == TARGET_SIG_DFL) {
|
| 435 |
if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
|
| 436 |
kill(getpid(),SIGSTOP); |
| 437 |
return 0; |
| 438 |
} else
|
| 439 |
/* default handler : ignore some signal. The other are fatal */
|
| 440 |
if (sig != TARGET_SIGCHLD &&
|
| 441 |
sig != TARGET_SIGURG && |
| 442 |
sig != TARGET_SIGWINCH && |
| 443 |
sig != TARGET_SIGCONT) {
|
| 444 |
force_sig(sig); |
| 445 |
} else {
|
| 446 |
return 0; /* indicate ignored */ |
| 447 |
} |
| 448 |
} else if (!queue && handler == TARGET_SIG_IGN) { |
| 449 |
/* ignore signal */
|
| 450 |
return 0; |
| 451 |
} else if (!queue && handler == TARGET_SIG_ERR) { |
| 452 |
force_sig(sig); |
| 453 |
} else {
|
| 454 |
pq = &k->first; |
| 455 |
if (sig < TARGET_SIGRTMIN) {
|
| 456 |
/* if non real time signal, we queue exactly one signal */
|
| 457 |
if (!k->pending)
|
| 458 |
q = &k->info; |
| 459 |
else
|
| 460 |
return 0; |
| 461 |
} else {
|
| 462 |
if (!k->pending) {
|
| 463 |
/* first signal */
|
| 464 |
q = &k->info; |
| 465 |
} else {
|
| 466 |
q = alloc_sigqueue(env); |
| 467 |
if (!q)
|
| 468 |
return -EAGAIN;
|
| 469 |
while (*pq != NULL) |
| 470 |
pq = &(*pq)->next; |
| 471 |
} |
| 472 |
} |
| 473 |
*pq = q; |
| 474 |
q->info = *info; |
| 475 |
q->next = NULL;
|
| 476 |
k->pending = 1;
|
| 477 |
/* signal that a new signal is pending */
|
| 478 |
ts->signal_pending = 1;
|
| 479 |
return 1; /* indicates that the signal was queued */ |
| 480 |
} |
| 481 |
} |
| 482 |
|
| 483 |
static void host_signal_handler(int host_signum, siginfo_t *info, |
| 484 |
void *puc)
|
| 485 |
{
|
| 486 |
int sig;
|
| 487 |
target_siginfo_t tinfo; |
| 488 |
|
| 489 |
/* the CPU emulator uses some host signals to detect exceptions,
|
| 490 |
we forward to it some signals */
|
| 491 |
if ((host_signum == SIGSEGV || host_signum == SIGBUS)
|
| 492 |
&& info->si_code > 0) {
|
| 493 |
if (cpu_signal_handler(host_signum, info, puc))
|
| 494 |
return;
|
| 495 |
} |
| 496 |
|
| 497 |
/* get target signal number */
|
| 498 |
sig = host_to_target_signal(host_signum); |
| 499 |
if (sig < 1 || sig > TARGET_NSIG) |
| 500 |
return;
|
| 501 |
#if defined(DEBUG_SIGNAL)
|
| 502 |
fprintf(stderr, "qemu: got signal %d\n", sig);
|
| 503 |
#endif
|
| 504 |
host_to_target_siginfo_noswap(&tinfo, info); |
| 505 |
if (queue_signal(thread_env, sig, &tinfo) == 1) { |
| 506 |
/* interrupt the virtual CPU as soon as possible */
|
| 507 |
cpu_exit(thread_env); |
| 508 |
} |
| 509 |
} |
| 510 |
|
| 511 |
/* do_sigaltstack() returns target values and errnos. */
|
| 512 |
/* compare linux/kernel/signal.c:do_sigaltstack() */
|
| 513 |
abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp) |
| 514 |
{
|
| 515 |
int ret;
|
| 516 |
struct target_sigaltstack oss;
|
| 517 |
|
| 518 |
/* XXX: test errors */
|
| 519 |
if(uoss_addr)
|
| 520 |
{
|
| 521 |
__put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp); |
| 522 |
__put_user(target_sigaltstack_used.ss_size, &oss.ss_size); |
| 523 |
__put_user(sas_ss_flags(sp), &oss.ss_flags); |
| 524 |
} |
| 525 |
|
| 526 |
if(uss_addr)
|
| 527 |
{
|
| 528 |
struct target_sigaltstack *uss;
|
| 529 |
struct target_sigaltstack ss;
|
| 530 |
|
| 531 |
ret = -TARGET_EFAULT; |
| 532 |
if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1) |
| 533 |
|| __get_user(ss.ss_sp, &uss->ss_sp) |
| 534 |
|| __get_user(ss.ss_size, &uss->ss_size) |
| 535 |
|| __get_user(ss.ss_flags, &uss->ss_flags)) |
| 536 |
goto out;
|
| 537 |
unlock_user_struct(uss, uss_addr, 0);
|
| 538 |
|
| 539 |
ret = -TARGET_EPERM; |
| 540 |
if (on_sig_stack(sp))
|
| 541 |
goto out;
|
| 542 |
|
| 543 |
ret = -TARGET_EINVAL; |
| 544 |
if (ss.ss_flags != TARGET_SS_DISABLE
|
| 545 |
&& ss.ss_flags != TARGET_SS_ONSTACK |
| 546 |
&& ss.ss_flags != 0)
|
| 547 |
goto out;
|
| 548 |
|
| 549 |
if (ss.ss_flags == TARGET_SS_DISABLE) {
|
| 550 |
ss.ss_size = 0;
|
| 551 |
ss.ss_sp = 0;
|
| 552 |
} else {
|
| 553 |
ret = -TARGET_ENOMEM; |
| 554 |
if (ss.ss_size < MINSIGSTKSZ)
|
| 555 |
goto out;
|
| 556 |
} |
| 557 |
|
| 558 |
target_sigaltstack_used.ss_sp = ss.ss_sp; |
| 559 |
target_sigaltstack_used.ss_size = ss.ss_size; |
| 560 |
} |
| 561 |
|
| 562 |
if (uoss_addr) {
|
| 563 |
ret = -TARGET_EFAULT; |
| 564 |
if (copy_to_user(uoss_addr, &oss, sizeof(oss))) |
| 565 |
goto out;
|
| 566 |
} |
| 567 |
|
| 568 |
ret = 0;
|
| 569 |
out:
|
| 570 |
return ret;
|
| 571 |
} |
| 572 |
|
| 573 |
/* do_sigaction() return host values and errnos */
|
| 574 |
int do_sigaction(int sig, const struct target_sigaction *act, |
| 575 |
struct target_sigaction *oact)
|
| 576 |
{
|
| 577 |
struct target_sigaction *k;
|
| 578 |
struct sigaction act1;
|
| 579 |
int host_sig;
|
| 580 |
int ret = 0; |
| 581 |
|
| 582 |
if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP) |
| 583 |
return -EINVAL;
|
| 584 |
k = &sigact_table[sig - 1];
|
| 585 |
#if defined(DEBUG_SIGNAL)
|
| 586 |
fprintf(stderr, "sigaction sig=%d act=0x%p, oact=0x%p\n",
|
| 587 |
sig, act, oact); |
| 588 |
#endif
|
| 589 |
if (oact) {
|
| 590 |
oact->_sa_handler = tswapl(k->_sa_handler); |
| 591 |
oact->sa_flags = tswapl(k->sa_flags); |
| 592 |
#if !defined(TARGET_MIPS)
|
| 593 |
oact->sa_restorer = tswapl(k->sa_restorer); |
| 594 |
#endif
|
| 595 |
oact->sa_mask = k->sa_mask; |
| 596 |
} |
| 597 |
if (act) {
|
| 598 |
/* FIXME: This is not threadsafe. */
|
| 599 |
k->_sa_handler = tswapl(act->_sa_handler); |
| 600 |
k->sa_flags = tswapl(act->sa_flags); |
| 601 |
#if !defined(TARGET_MIPS)
|
| 602 |
k->sa_restorer = tswapl(act->sa_restorer); |
| 603 |
#endif
|
| 604 |
k->sa_mask = act->sa_mask; |
| 605 |
|
| 606 |
/* we update the host linux signal state */
|
| 607 |
host_sig = target_to_host_signal(sig); |
| 608 |
if (host_sig != SIGSEGV && host_sig != SIGBUS) {
|
| 609 |
sigfillset(&act1.sa_mask); |
| 610 |
act1.sa_flags = SA_SIGINFO; |
| 611 |
if (k->sa_flags & TARGET_SA_RESTART)
|
| 612 |
act1.sa_flags |= SA_RESTART; |
| 613 |
/* NOTE: it is important to update the host kernel signal
|
| 614 |
ignore state to avoid getting unexpected interrupted
|
| 615 |
syscalls */
|
| 616 |
if (k->_sa_handler == TARGET_SIG_IGN) {
|
| 617 |
act1.sa_sigaction = (void *)SIG_IGN;
|
| 618 |
} else if (k->_sa_handler == TARGET_SIG_DFL) { |
| 619 |
if (fatal_signal (sig))
|
| 620 |
act1.sa_sigaction = host_signal_handler; |
| 621 |
else
|
| 622 |
act1.sa_sigaction = (void *)SIG_DFL;
|
| 623 |
} else {
|
| 624 |
act1.sa_sigaction = host_signal_handler; |
| 625 |
} |
| 626 |
ret = sigaction(host_sig, &act1, NULL);
|
| 627 |
} |
| 628 |
} |
| 629 |
return ret;
|
| 630 |
} |
| 631 |
|
| 632 |
static inline int copy_siginfo_to_user(target_siginfo_t *tinfo, |
| 633 |
const target_siginfo_t *info)
|
| 634 |
{
|
| 635 |
tswap_siginfo(tinfo, info); |
| 636 |
return 0; |
| 637 |
} |
| 638 |
|
| 639 |
static inline int current_exec_domain_sig(int sig) |
| 640 |
{
|
| 641 |
return /* current->exec_domain && current->exec_domain->signal_invmap |
| 642 |
&& sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig;
|
| 643 |
} |
| 644 |
|
| 645 |
#if defined(TARGET_I386) && TARGET_ABI_BITS == 32 |
| 646 |
|
| 647 |
/* from the Linux kernel */
|
| 648 |
|
| 649 |
struct target_fpreg {
|
| 650 |
uint16_t significand[4];
|
| 651 |
uint16_t exponent; |
| 652 |
}; |
| 653 |
|
| 654 |
struct target_fpxreg {
|
| 655 |
uint16_t significand[4];
|
| 656 |
uint16_t exponent; |
| 657 |
uint16_t padding[3];
|
| 658 |
}; |
| 659 |
|
| 660 |
struct target_xmmreg {
|
| 661 |
abi_ulong element[4];
|
| 662 |
}; |
| 663 |
|
| 664 |
struct target_fpstate {
|
| 665 |
/* Regular FPU environment */
|
| 666 |
abi_ulong cw; |
| 667 |
abi_ulong sw; |
| 668 |
abi_ulong tag; |
| 669 |
abi_ulong ipoff; |
| 670 |
abi_ulong cssel; |
| 671 |
abi_ulong dataoff; |
| 672 |
abi_ulong datasel; |
| 673 |
struct target_fpreg _st[8]; |
| 674 |
uint16_t status; |
| 675 |
uint16_t magic; /* 0xffff = regular FPU data only */
|
| 676 |
|
| 677 |
/* FXSR FPU environment */
|
| 678 |
abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */ |
| 679 |
abi_ulong mxcsr; |
| 680 |
abi_ulong reserved; |
| 681 |
struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ |
| 682 |
struct target_xmmreg _xmm[8]; |
| 683 |
abi_ulong padding[56];
|
| 684 |
}; |
| 685 |
|
| 686 |
#define X86_FXSR_MAGIC 0x0000 |
| 687 |
|
| 688 |
struct target_sigcontext {
|
| 689 |
uint16_t gs, __gsh; |
| 690 |
uint16_t fs, __fsh; |
| 691 |
uint16_t es, __esh; |
| 692 |
uint16_t ds, __dsh; |
| 693 |
abi_ulong edi; |
| 694 |
abi_ulong esi; |
| 695 |
abi_ulong ebp; |
| 696 |
abi_ulong esp; |
| 697 |
abi_ulong ebx; |
| 698 |
abi_ulong edx; |
| 699 |
abi_ulong ecx; |
| 700 |
abi_ulong eax; |
| 701 |
abi_ulong trapno; |
| 702 |
abi_ulong err; |
| 703 |
abi_ulong eip; |
| 704 |
uint16_t cs, __csh; |
| 705 |
abi_ulong eflags; |
| 706 |
abi_ulong esp_at_signal; |
| 707 |
uint16_t ss, __ssh; |
| 708 |
abi_ulong fpstate; /* pointer */
|
| 709 |
abi_ulong oldmask; |
| 710 |
abi_ulong cr2; |
| 711 |
}; |
| 712 |
|
| 713 |
struct target_ucontext {
|
| 714 |
abi_ulong tuc_flags; |
| 715 |
abi_ulong tuc_link; |
| 716 |
target_stack_t tuc_stack; |
| 717 |
struct target_sigcontext tuc_mcontext;
|
| 718 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
| 719 |
}; |
| 720 |
|
| 721 |
struct sigframe
|
| 722 |
{
|
| 723 |
abi_ulong pretcode; |
| 724 |
int sig;
|
| 725 |
struct target_sigcontext sc;
|
| 726 |
struct target_fpstate fpstate;
|
| 727 |
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
| 728 |
char retcode[8]; |
| 729 |
}; |
| 730 |
|
| 731 |
struct rt_sigframe
|
| 732 |
{
|
| 733 |
abi_ulong pretcode; |
| 734 |
int sig;
|
| 735 |
abi_ulong pinfo; |
| 736 |
abi_ulong puc; |
| 737 |
struct target_siginfo info;
|
| 738 |
struct target_ucontext uc;
|
| 739 |
struct target_fpstate fpstate;
|
| 740 |
char retcode[8]; |
| 741 |
}; |
| 742 |
|
| 743 |
/*
|
| 744 |
* Set up a signal frame.
|
| 745 |
*/
|
| 746 |
|
| 747 |
/* XXX: save x87 state */
|
| 748 |
static int |
| 749 |
setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate, |
| 750 |
CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr) |
| 751 |
{
|
| 752 |
int err = 0; |
| 753 |
uint16_t magic; |
| 754 |
|
| 755 |
/* already locked in setup_frame() */
|
| 756 |
err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs); |
| 757 |
err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs); |
| 758 |
err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es); |
| 759 |
err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds); |
| 760 |
err |= __put_user(env->regs[R_EDI], &sc->edi); |
| 761 |
err |= __put_user(env->regs[R_ESI], &sc->esi); |
| 762 |
err |= __put_user(env->regs[R_EBP], &sc->ebp); |
| 763 |
err |= __put_user(env->regs[R_ESP], &sc->esp); |
| 764 |
err |= __put_user(env->regs[R_EBX], &sc->ebx); |
| 765 |
err |= __put_user(env->regs[R_EDX], &sc->edx); |
| 766 |
err |= __put_user(env->regs[R_ECX], &sc->ecx); |
| 767 |
err |= __put_user(env->regs[R_EAX], &sc->eax); |
| 768 |
err |= __put_user(env->exception_index, &sc->trapno); |
| 769 |
err |= __put_user(env->error_code, &sc->err); |
| 770 |
err |= __put_user(env->eip, &sc->eip); |
| 771 |
err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); |
| 772 |
err |= __put_user(env->eflags, &sc->eflags); |
| 773 |
err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal); |
| 774 |
err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); |
| 775 |
|
| 776 |
cpu_x86_fsave(env, fpstate_addr, 1);
|
| 777 |
fpstate->status = fpstate->sw; |
| 778 |
magic = 0xffff;
|
| 779 |
err |= __put_user(magic, &fpstate->magic); |
| 780 |
err |= __put_user(fpstate_addr, &sc->fpstate); |
| 781 |
|
| 782 |
/* non-iBCS2 extensions.. */
|
| 783 |
err |= __put_user(mask, &sc->oldmask); |
| 784 |
err |= __put_user(env->cr[2], &sc->cr2);
|
| 785 |
return err;
|
| 786 |
} |
| 787 |
|
| 788 |
/*
|
| 789 |
* Determine which stack to use..
|
| 790 |
*/
|
| 791 |
|
| 792 |
static inline abi_ulong |
| 793 |
get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
|
| 794 |
{
|
| 795 |
unsigned long esp; |
| 796 |
|
| 797 |
/* Default to using normal stack */
|
| 798 |
esp = env->regs[R_ESP]; |
| 799 |
/* This is the X/Open sanctioned signal stack switching. */
|
| 800 |
if (ka->sa_flags & TARGET_SA_ONSTACK) {
|
| 801 |
if (sas_ss_flags(esp) == 0) |
| 802 |
esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 803 |
} |
| 804 |
|
| 805 |
/* This is the legacy signal stack switching. */
|
| 806 |
else
|
| 807 |
if ((env->segs[R_SS].selector & 0xffff) != __USER_DS && |
| 808 |
!(ka->sa_flags & TARGET_SA_RESTORER) && |
| 809 |
ka->sa_restorer) {
|
| 810 |
esp = (unsigned long) ka->sa_restorer; |
| 811 |
} |
| 812 |
return (esp - frame_size) & -8ul; |
| 813 |
} |
| 814 |
|
| 815 |
/* compare linux/arch/i386/kernel/signal.c:setup_frame() */
|
| 816 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 817 |
target_sigset_t *set, CPUX86State *env) |
| 818 |
{
|
| 819 |
abi_ulong frame_addr; |
| 820 |
struct sigframe *frame;
|
| 821 |
int i, err = 0; |
| 822 |
|
| 823 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
| 824 |
|
| 825 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 826 |
goto give_sigsegv;
|
| 827 |
|
| 828 |
err |= __put_user(current_exec_domain_sig(sig), |
| 829 |
&frame->sig); |
| 830 |
if (err)
|
| 831 |
goto give_sigsegv;
|
| 832 |
|
| 833 |
setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
|
| 834 |
frame_addr + offsetof(struct sigframe, fpstate));
|
| 835 |
if (err)
|
| 836 |
goto give_sigsegv;
|
| 837 |
|
| 838 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 839 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
| 840 |
goto give_sigsegv;
|
| 841 |
} |
| 842 |
|
| 843 |
/* Set up to return from userspace. If provided, use a stub
|
| 844 |
already in userspace. */
|
| 845 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
| 846 |
err |= __put_user(ka->sa_restorer, &frame->pretcode); |
| 847 |
} else {
|
| 848 |
uint16_t val16; |
| 849 |
abi_ulong retcode_addr; |
| 850 |
retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
|
| 851 |
err |= __put_user(retcode_addr, &frame->pretcode); |
| 852 |
/* This is popl %eax ; movl $,%eax ; int $0x80 */
|
| 853 |
val16 = 0xb858;
|
| 854 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+0));
|
| 855 |
err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); |
| 856 |
val16 = 0x80cd;
|
| 857 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+6));
|
| 858 |
} |
| 859 |
|
| 860 |
if (err)
|
| 861 |
goto give_sigsegv;
|
| 862 |
|
| 863 |
/* Set up registers for signal handler */
|
| 864 |
env->regs[R_ESP] = frame_addr; |
| 865 |
env->eip = ka->_sa_handler; |
| 866 |
|
| 867 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
| 868 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
| 869 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
| 870 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
| 871 |
env->eflags &= ~TF_MASK; |
| 872 |
|
| 873 |
unlock_user_struct(frame, frame_addr, 1);
|
| 874 |
|
| 875 |
return;
|
| 876 |
|
| 877 |
give_sigsegv:
|
| 878 |
unlock_user_struct(frame, frame_addr, 1);
|
| 879 |
if (sig == TARGET_SIGSEGV)
|
| 880 |
ka->_sa_handler = TARGET_SIG_DFL; |
| 881 |
force_sig(TARGET_SIGSEGV /* , current */);
|
| 882 |
} |
| 883 |
|
| 884 |
/* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */
|
| 885 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 886 |
target_siginfo_t *info, |
| 887 |
target_sigset_t *set, CPUX86State *env) |
| 888 |
{
|
| 889 |
abi_ulong frame_addr, addr; |
| 890 |
struct rt_sigframe *frame;
|
| 891 |
int i, err = 0; |
| 892 |
|
| 893 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
| 894 |
|
| 895 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 896 |
goto give_sigsegv;
|
| 897 |
|
| 898 |
err |= __put_user(current_exec_domain_sig(sig), |
| 899 |
&frame->sig); |
| 900 |
addr = frame_addr + offsetof(struct rt_sigframe, info);
|
| 901 |
err |= __put_user(addr, &frame->pinfo); |
| 902 |
addr = frame_addr + offsetof(struct rt_sigframe, uc);
|
| 903 |
err |= __put_user(addr, &frame->puc); |
| 904 |
err |= copy_siginfo_to_user(&frame->info, info); |
| 905 |
if (err)
|
| 906 |
goto give_sigsegv;
|
| 907 |
|
| 908 |
/* Create the ucontext. */
|
| 909 |
err |= __put_user(0, &frame->uc.tuc_flags);
|
| 910 |
err |= __put_user(0, &frame->uc.tuc_link);
|
| 911 |
err |= __put_user(target_sigaltstack_used.ss_sp, |
| 912 |
&frame->uc.tuc_stack.ss_sp); |
| 913 |
err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)), |
| 914 |
&frame->uc.tuc_stack.ss_flags); |
| 915 |
err |= __put_user(target_sigaltstack_used.ss_size, |
| 916 |
&frame->uc.tuc_stack.ss_size); |
| 917 |
err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, |
| 918 |
env, set->sig[0],
|
| 919 |
frame_addr + offsetof(struct rt_sigframe, fpstate));
|
| 920 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 921 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
| 922 |
goto give_sigsegv;
|
| 923 |
} |
| 924 |
|
| 925 |
/* Set up to return from userspace. If provided, use a stub
|
| 926 |
already in userspace. */
|
| 927 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
| 928 |
err |= __put_user(ka->sa_restorer, &frame->pretcode); |
| 929 |
} else {
|
| 930 |
uint16_t val16; |
| 931 |
addr = frame_addr + offsetof(struct rt_sigframe, retcode);
|
| 932 |
err |= __put_user(addr, &frame->pretcode); |
| 933 |
/* This is movl $,%eax ; int $0x80 */
|
| 934 |
err |= __put_user(0xb8, (char *)(frame->retcode+0)); |
| 935 |
err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); |
| 936 |
val16 = 0x80cd;
|
| 937 |
err |= __put_user(val16, (uint16_t *)(frame->retcode+5));
|
| 938 |
} |
| 939 |
|
| 940 |
if (err)
|
| 941 |
goto give_sigsegv;
|
| 942 |
|
| 943 |
/* Set up registers for signal handler */
|
| 944 |
env->regs[R_ESP] = frame_addr; |
| 945 |
env->eip = ka->_sa_handler; |
| 946 |
|
| 947 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
| 948 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
| 949 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
| 950 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
| 951 |
env->eflags &= ~TF_MASK; |
| 952 |
|
| 953 |
unlock_user_struct(frame, frame_addr, 1);
|
| 954 |
|
| 955 |
return;
|
| 956 |
|
| 957 |
give_sigsegv:
|
| 958 |
unlock_user_struct(frame, frame_addr, 1);
|
| 959 |
if (sig == TARGET_SIGSEGV)
|
| 960 |
ka->_sa_handler = TARGET_SIG_DFL; |
| 961 |
force_sig(TARGET_SIGSEGV /* , current */);
|
| 962 |
} |
| 963 |
|
| 964 |
static int |
| 965 |
restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax) |
| 966 |
{
|
| 967 |
unsigned int err = 0; |
| 968 |
abi_ulong fpstate_addr; |
| 969 |
unsigned int tmpflags; |
| 970 |
|
| 971 |
cpu_x86_load_seg(env, R_GS, tswap16(sc->gs)); |
| 972 |
cpu_x86_load_seg(env, R_FS, tswap16(sc->fs)); |
| 973 |
cpu_x86_load_seg(env, R_ES, tswap16(sc->es)); |
| 974 |
cpu_x86_load_seg(env, R_DS, tswap16(sc->ds)); |
| 975 |
|
| 976 |
env->regs[R_EDI] = tswapl(sc->edi); |
| 977 |
env->regs[R_ESI] = tswapl(sc->esi); |
| 978 |
env->regs[R_EBP] = tswapl(sc->ebp); |
| 979 |
env->regs[R_ESP] = tswapl(sc->esp); |
| 980 |
env->regs[R_EBX] = tswapl(sc->ebx); |
| 981 |
env->regs[R_EDX] = tswapl(sc->edx); |
| 982 |
env->regs[R_ECX] = tswapl(sc->ecx); |
| 983 |
env->eip = tswapl(sc->eip); |
| 984 |
|
| 985 |
cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
|
| 986 |
cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
|
| 987 |
|
| 988 |
tmpflags = tswapl(sc->eflags); |
| 989 |
env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5); |
| 990 |
// regs->orig_eax = -1; /* disable syscall checks */
|
| 991 |
|
| 992 |
fpstate_addr = tswapl(sc->fpstate); |
| 993 |
if (fpstate_addr != 0) { |
| 994 |
if (!access_ok(VERIFY_READ, fpstate_addr,
|
| 995 |
sizeof(struct target_fpstate))) |
| 996 |
goto badframe;
|
| 997 |
cpu_x86_frstor(env, fpstate_addr, 1);
|
| 998 |
} |
| 999 |
|
| 1000 |
*peax = tswapl(sc->eax); |
| 1001 |
return err;
|
| 1002 |
badframe:
|
| 1003 |
return 1; |
| 1004 |
} |
| 1005 |
|
| 1006 |
long do_sigreturn(CPUX86State *env)
|
| 1007 |
{
|
| 1008 |
struct sigframe *frame;
|
| 1009 |
abi_ulong frame_addr = env->regs[R_ESP] - 8;
|
| 1010 |
target_sigset_t target_set; |
| 1011 |
sigset_t set; |
| 1012 |
int eax, i;
|
| 1013 |
|
| 1014 |
#if defined(DEBUG_SIGNAL)
|
| 1015 |
fprintf(stderr, "do_sigreturn\n");
|
| 1016 |
#endif
|
| 1017 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 1018 |
goto badframe;
|
| 1019 |
/* set blocked signals */
|
| 1020 |
if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
| 1021 |
goto badframe;
|
| 1022 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 1023 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
| 1024 |
goto badframe;
|
| 1025 |
} |
| 1026 |
|
| 1027 |
target_to_host_sigset_internal(&set, &target_set); |
| 1028 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 1029 |
|
| 1030 |
/* restore registers */
|
| 1031 |
if (restore_sigcontext(env, &frame->sc, &eax))
|
| 1032 |
goto badframe;
|
| 1033 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1034 |
return eax;
|
| 1035 |
|
| 1036 |
badframe:
|
| 1037 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1038 |
force_sig(TARGET_SIGSEGV); |
| 1039 |
return 0; |
| 1040 |
} |
| 1041 |
|
| 1042 |
long do_rt_sigreturn(CPUX86State *env)
|
| 1043 |
{
|
| 1044 |
abi_ulong frame_addr; |
| 1045 |
struct rt_sigframe *frame;
|
| 1046 |
sigset_t set; |
| 1047 |
int eax;
|
| 1048 |
|
| 1049 |
frame_addr = env->regs[R_ESP] - 4;
|
| 1050 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 1051 |
goto badframe;
|
| 1052 |
target_to_host_sigset(&set, &frame->uc.tuc_sigmask); |
| 1053 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 1054 |
|
| 1055 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
|
| 1056 |
goto badframe;
|
| 1057 |
|
| 1058 |
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, |
| 1059 |
get_sp_from_cpustate(env)) == -EFAULT) |
| 1060 |
goto badframe;
|
| 1061 |
|
| 1062 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1063 |
return eax;
|
| 1064 |
|
| 1065 |
badframe:
|
| 1066 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1067 |
force_sig(TARGET_SIGSEGV); |
| 1068 |
return 0; |
| 1069 |
} |
| 1070 |
|
| 1071 |
#elif defined(TARGET_ARM)
|
| 1072 |
|
| 1073 |
struct target_sigcontext {
|
| 1074 |
abi_ulong trap_no; |
| 1075 |
abi_ulong error_code; |
| 1076 |
abi_ulong oldmask; |
| 1077 |
abi_ulong arm_r0; |
| 1078 |
abi_ulong arm_r1; |
| 1079 |
abi_ulong arm_r2; |
| 1080 |
abi_ulong arm_r3; |
| 1081 |
abi_ulong arm_r4; |
| 1082 |
abi_ulong arm_r5; |
| 1083 |
abi_ulong arm_r6; |
| 1084 |
abi_ulong arm_r7; |
| 1085 |
abi_ulong arm_r8; |
| 1086 |
abi_ulong arm_r9; |
| 1087 |
abi_ulong arm_r10; |
| 1088 |
abi_ulong arm_fp; |
| 1089 |
abi_ulong arm_ip; |
| 1090 |
abi_ulong arm_sp; |
| 1091 |
abi_ulong arm_lr; |
| 1092 |
abi_ulong arm_pc; |
| 1093 |
abi_ulong arm_cpsr; |
| 1094 |
abi_ulong fault_address; |
| 1095 |
}; |
| 1096 |
|
| 1097 |
struct target_ucontext_v1 {
|
| 1098 |
abi_ulong tuc_flags; |
| 1099 |
abi_ulong tuc_link; |
| 1100 |
target_stack_t tuc_stack; |
| 1101 |
struct target_sigcontext tuc_mcontext;
|
| 1102 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
| 1103 |
}; |
| 1104 |
|
| 1105 |
struct target_ucontext_v2 {
|
| 1106 |
abi_ulong tuc_flags; |
| 1107 |
abi_ulong tuc_link; |
| 1108 |
target_stack_t tuc_stack; |
| 1109 |
struct target_sigcontext tuc_mcontext;
|
| 1110 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
| 1111 |
char __unused[128 - sizeof(sigset_t)]; |
| 1112 |
abi_ulong tuc_regspace[128] __attribute__((__aligned__(8))); |
| 1113 |
}; |
| 1114 |
|
| 1115 |
struct sigframe_v1
|
| 1116 |
{
|
| 1117 |
struct target_sigcontext sc;
|
| 1118 |
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
| 1119 |
abi_ulong retcode; |
| 1120 |
}; |
| 1121 |
|
| 1122 |
struct sigframe_v2
|
| 1123 |
{
|
| 1124 |
struct target_ucontext_v2 uc;
|
| 1125 |
abi_ulong retcode; |
| 1126 |
}; |
| 1127 |
|
| 1128 |
struct rt_sigframe_v1
|
| 1129 |
{
|
| 1130 |
abi_ulong pinfo; |
| 1131 |
abi_ulong puc; |
| 1132 |
struct target_siginfo info;
|
| 1133 |
struct target_ucontext_v1 uc;
|
| 1134 |
abi_ulong retcode; |
| 1135 |
}; |
| 1136 |
|
| 1137 |
struct rt_sigframe_v2
|
| 1138 |
{
|
| 1139 |
struct target_siginfo info;
|
| 1140 |
struct target_ucontext_v2 uc;
|
| 1141 |
abi_ulong retcode; |
| 1142 |
}; |
| 1143 |
|
| 1144 |
#define TARGET_CONFIG_CPU_32 1 |
| 1145 |
|
| 1146 |
/*
|
| 1147 |
* For ARM syscalls, we encode the syscall number into the instruction.
|
| 1148 |
*/
|
| 1149 |
#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) |
| 1150 |
#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) |
| 1151 |
|
| 1152 |
/*
|
| 1153 |
* For Thumb syscalls, we pass the syscall number via r7. We therefore
|
| 1154 |
* need two 16-bit instructions.
|
| 1155 |
*/
|
| 1156 |
#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) |
| 1157 |
#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) |
| 1158 |
|
| 1159 |
static const abi_ulong retcodes[4] = { |
| 1160 |
SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, |
| 1161 |
SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN |
| 1162 |
}; |
| 1163 |
|
| 1164 |
|
| 1165 |
#define __get_user_error(x,p,e) __get_user(x, p)
|
| 1166 |
|
| 1167 |
static inline int valid_user_regs(CPUState *regs) |
| 1168 |
{
|
| 1169 |
return 1; |
| 1170 |
} |
| 1171 |
|
| 1172 |
static void |
| 1173 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ |
| 1174 |
CPUState *env, abi_ulong mask) |
| 1175 |
{
|
| 1176 |
__put_user(env->regs[0], &sc->arm_r0);
|
| 1177 |
__put_user(env->regs[1], &sc->arm_r1);
|
| 1178 |
__put_user(env->regs[2], &sc->arm_r2);
|
| 1179 |
__put_user(env->regs[3], &sc->arm_r3);
|
| 1180 |
__put_user(env->regs[4], &sc->arm_r4);
|
| 1181 |
__put_user(env->regs[5], &sc->arm_r5);
|
| 1182 |
__put_user(env->regs[6], &sc->arm_r6);
|
| 1183 |
__put_user(env->regs[7], &sc->arm_r7);
|
| 1184 |
__put_user(env->regs[8], &sc->arm_r8);
|
| 1185 |
__put_user(env->regs[9], &sc->arm_r9);
|
| 1186 |
__put_user(env->regs[10], &sc->arm_r10);
|
| 1187 |
__put_user(env->regs[11], &sc->arm_fp);
|
| 1188 |
__put_user(env->regs[12], &sc->arm_ip);
|
| 1189 |
__put_user(env->regs[13], &sc->arm_sp);
|
| 1190 |
__put_user(env->regs[14], &sc->arm_lr);
|
| 1191 |
__put_user(env->regs[15], &sc->arm_pc);
|
| 1192 |
#ifdef TARGET_CONFIG_CPU_32
|
| 1193 |
__put_user(cpsr_read(env), &sc->arm_cpsr); |
| 1194 |
#endif
|
| 1195 |
|
| 1196 |
__put_user(/* current->thread.trap_no */ 0, &sc->trap_no); |
| 1197 |
__put_user(/* current->thread.error_code */ 0, &sc->error_code); |
| 1198 |
__put_user(/* current->thread.address */ 0, &sc->fault_address); |
| 1199 |
__put_user(mask, &sc->oldmask); |
| 1200 |
} |
| 1201 |
|
| 1202 |
static inline abi_ulong |
| 1203 |
get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize) |
| 1204 |
{
|
| 1205 |
unsigned long sp = regs->regs[13]; |
| 1206 |
|
| 1207 |
/*
|
| 1208 |
* This is the X/Open sanctioned signal stack switching.
|
| 1209 |
*/
|
| 1210 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp))
|
| 1211 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 1212 |
/*
|
| 1213 |
* ATPCS B01 mandates 8-byte alignment
|
| 1214 |
*/
|
| 1215 |
return (sp - framesize) & ~7; |
| 1216 |
} |
| 1217 |
|
| 1218 |
static int |
| 1219 |
setup_return(CPUState *env, struct target_sigaction *ka,
|
| 1220 |
abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
|
| 1221 |
{
|
| 1222 |
abi_ulong handler = ka->_sa_handler; |
| 1223 |
abi_ulong retcode; |
| 1224 |
int thumb = handler & 1; |
| 1225 |
|
| 1226 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
| 1227 |
retcode = ka->sa_restorer; |
| 1228 |
} else {
|
| 1229 |
unsigned int idx = thumb; |
| 1230 |
|
| 1231 |
if (ka->sa_flags & TARGET_SA_SIGINFO)
|
| 1232 |
idx += 2;
|
| 1233 |
|
| 1234 |
if (__put_user(retcodes[idx], rc))
|
| 1235 |
return 1; |
| 1236 |
#if 0
|
| 1237 |
flush_icache_range((abi_ulong)rc,
|
| 1238 |
(abi_ulong)(rc + 1));
|
| 1239 |
#endif
|
| 1240 |
retcode = rc_addr + thumb; |
| 1241 |
} |
| 1242 |
|
| 1243 |
env->regs[0] = usig;
|
| 1244 |
env->regs[13] = frame_addr;
|
| 1245 |
env->regs[14] = retcode;
|
| 1246 |
env->regs[15] = handler & (thumb ? ~1 : ~3); |
| 1247 |
env->thumb = thumb; |
| 1248 |
|
| 1249 |
#if 0
|
| 1250 |
#ifdef TARGET_CONFIG_CPU_32
|
| 1251 |
env->cpsr = cpsr;
|
| 1252 |
#endif
|
| 1253 |
#endif
|
| 1254 |
|
| 1255 |
return 0; |
| 1256 |
} |
| 1257 |
|
| 1258 |
static void setup_sigframe_v2(struct target_ucontext_v2 *uc, |
| 1259 |
target_sigset_t *set, CPUState *env) |
| 1260 |
{
|
| 1261 |
struct target_sigaltstack stack;
|
| 1262 |
int i;
|
| 1263 |
|
| 1264 |
/* Clear all the bits of the ucontext we don't use. */
|
| 1265 |
memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); |
| 1266 |
|
| 1267 |
memset(&stack, 0, sizeof(stack)); |
| 1268 |
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); |
| 1269 |
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size); |
| 1270 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); |
| 1271 |
memcpy(&uc->tuc_stack, &stack, sizeof(stack));
|
| 1272 |
|
| 1273 |
setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
|
| 1274 |
/* FIXME: Save coprocessor signal frame. */
|
| 1275 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 1276 |
__put_user(set->sig[i], &uc->tuc_sigmask.sig[i]); |
| 1277 |
} |
| 1278 |
} |
| 1279 |
|
| 1280 |
/* compare linux/arch/arm/kernel/signal.c:setup_frame() */
|
| 1281 |
static void setup_frame_v1(int usig, struct target_sigaction *ka, |
| 1282 |
target_sigset_t *set, CPUState *regs) |
| 1283 |
{
|
| 1284 |
struct sigframe_v1 *frame;
|
| 1285 |
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
| 1286 |
int i;
|
| 1287 |
|
| 1288 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 1289 |
return;
|
| 1290 |
|
| 1291 |
setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
| 1292 |
|
| 1293 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 1294 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
| 1295 |
goto end;
|
| 1296 |
} |
| 1297 |
|
| 1298 |
setup_return(regs, ka, &frame->retcode, frame_addr, usig, |
| 1299 |
frame_addr + offsetof(struct sigframe_v1, retcode));
|
| 1300 |
|
| 1301 |
end:
|
| 1302 |
unlock_user_struct(frame, frame_addr, 1);
|
| 1303 |
} |
| 1304 |
|
| 1305 |
static void setup_frame_v2(int usig, struct target_sigaction *ka, |
| 1306 |
target_sigset_t *set, CPUState *regs) |
| 1307 |
{
|
| 1308 |
struct sigframe_v2 *frame;
|
| 1309 |
abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
| 1310 |
|
| 1311 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 1312 |
return;
|
| 1313 |
|
| 1314 |
setup_sigframe_v2(&frame->uc, set, regs); |
| 1315 |
|
| 1316 |
setup_return(regs, ka, &frame->retcode, frame_addr, usig, |
| 1317 |
frame_addr + offsetof(struct sigframe_v2, retcode));
|
| 1318 |
|
| 1319 |
unlock_user_struct(frame, frame_addr, 1);
|
| 1320 |
} |
| 1321 |
|
| 1322 |
static void setup_frame(int usig, struct target_sigaction *ka, |
| 1323 |
target_sigset_t *set, CPUState *regs) |
| 1324 |
{
|
| 1325 |
if (get_osversion() >= 0x020612) { |
| 1326 |
setup_frame_v2(usig, ka, set, regs); |
| 1327 |
} else {
|
| 1328 |
setup_frame_v1(usig, ka, set, regs); |
| 1329 |
} |
| 1330 |
} |
| 1331 |
|
| 1332 |
/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
|
| 1333 |
static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, |
| 1334 |
target_siginfo_t *info, |
| 1335 |
target_sigset_t *set, CPUState *env) |
| 1336 |
{
|
| 1337 |
struct rt_sigframe_v1 *frame;
|
| 1338 |
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
| 1339 |
struct target_sigaltstack stack;
|
| 1340 |
int i;
|
| 1341 |
abi_ulong info_addr, uc_addr; |
| 1342 |
|
| 1343 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 1344 |
return /* 1 */; |
| 1345 |
|
| 1346 |
info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
|
| 1347 |
__put_user(info_addr, &frame->pinfo); |
| 1348 |
uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
|
| 1349 |
__put_user(uc_addr, &frame->puc); |
| 1350 |
copy_siginfo_to_user(&frame->info, info); |
| 1351 |
|
| 1352 |
/* Clear all the bits of the ucontext we don't use. */
|
| 1353 |
memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext)); |
| 1354 |
|
| 1355 |
memset(&stack, 0, sizeof(stack)); |
| 1356 |
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); |
| 1357 |
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size); |
| 1358 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); |
| 1359 |
memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
|
| 1360 |
|
| 1361 |
setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
|
| 1362 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 1363 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
| 1364 |
goto end;
|
| 1365 |
} |
| 1366 |
|
| 1367 |
setup_return(env, ka, &frame->retcode, frame_addr, usig, |
| 1368 |
frame_addr + offsetof(struct rt_sigframe_v1, retcode));
|
| 1369 |
|
| 1370 |
env->regs[1] = info_addr;
|
| 1371 |
env->regs[2] = uc_addr;
|
| 1372 |
|
| 1373 |
end:
|
| 1374 |
unlock_user_struct(frame, frame_addr, 1);
|
| 1375 |
} |
| 1376 |
|
| 1377 |
static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, |
| 1378 |
target_siginfo_t *info, |
| 1379 |
target_sigset_t *set, CPUState *env) |
| 1380 |
{
|
| 1381 |
struct rt_sigframe_v2 *frame;
|
| 1382 |
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
| 1383 |
abi_ulong info_addr, uc_addr; |
| 1384 |
|
| 1385 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 1386 |
return /* 1 */; |
| 1387 |
|
| 1388 |
info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
|
| 1389 |
uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
|
| 1390 |
copy_siginfo_to_user(&frame->info, info); |
| 1391 |
|
| 1392 |
setup_sigframe_v2(&frame->uc, set, env); |
| 1393 |
|
| 1394 |
setup_return(env, ka, &frame->retcode, frame_addr, usig, |
| 1395 |
frame_addr + offsetof(struct rt_sigframe_v2, retcode));
|
| 1396 |
|
| 1397 |
env->regs[1] = info_addr;
|
| 1398 |
env->regs[2] = uc_addr;
|
| 1399 |
|
| 1400 |
unlock_user_struct(frame, frame_addr, 1);
|
| 1401 |
} |
| 1402 |
|
| 1403 |
static void setup_rt_frame(int usig, struct target_sigaction *ka, |
| 1404 |
target_siginfo_t *info, |
| 1405 |
target_sigset_t *set, CPUState *env) |
| 1406 |
{
|
| 1407 |
if (get_osversion() >= 0x020612) { |
| 1408 |
setup_rt_frame_v2(usig, ka, info, set, env); |
| 1409 |
} else {
|
| 1410 |
setup_rt_frame_v1(usig, ka, info, set, env); |
| 1411 |
} |
| 1412 |
} |
| 1413 |
|
| 1414 |
static int |
| 1415 |
restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
|
| 1416 |
{
|
| 1417 |
int err = 0; |
| 1418 |
uint32_t cpsr; |
| 1419 |
|
| 1420 |
__get_user_error(env->regs[0], &sc->arm_r0, err);
|
| 1421 |
__get_user_error(env->regs[1], &sc->arm_r1, err);
|
| 1422 |
__get_user_error(env->regs[2], &sc->arm_r2, err);
|
| 1423 |
__get_user_error(env->regs[3], &sc->arm_r3, err);
|
| 1424 |
__get_user_error(env->regs[4], &sc->arm_r4, err);
|
| 1425 |
__get_user_error(env->regs[5], &sc->arm_r5, err);
|
| 1426 |
__get_user_error(env->regs[6], &sc->arm_r6, err);
|
| 1427 |
__get_user_error(env->regs[7], &sc->arm_r7, err);
|
| 1428 |
__get_user_error(env->regs[8], &sc->arm_r8, err);
|
| 1429 |
__get_user_error(env->regs[9], &sc->arm_r9, err);
|
| 1430 |
__get_user_error(env->regs[10], &sc->arm_r10, err);
|
| 1431 |
__get_user_error(env->regs[11], &sc->arm_fp, err);
|
| 1432 |
__get_user_error(env->regs[12], &sc->arm_ip, err);
|
| 1433 |
__get_user_error(env->regs[13], &sc->arm_sp, err);
|
| 1434 |
__get_user_error(env->regs[14], &sc->arm_lr, err);
|
| 1435 |
__get_user_error(env->regs[15], &sc->arm_pc, err);
|
| 1436 |
#ifdef TARGET_CONFIG_CPU_32
|
| 1437 |
__get_user_error(cpsr, &sc->arm_cpsr, err); |
| 1438 |
cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC); |
| 1439 |
#endif
|
| 1440 |
|
| 1441 |
err |= !valid_user_regs(env); |
| 1442 |
|
| 1443 |
return err;
|
| 1444 |
} |
| 1445 |
|
| 1446 |
static long do_sigreturn_v1(CPUState *env) |
| 1447 |
{
|
| 1448 |
abi_ulong frame_addr; |
| 1449 |
struct sigframe_v1 *frame;
|
| 1450 |
target_sigset_t set; |
| 1451 |
sigset_t host_set; |
| 1452 |
int i;
|
| 1453 |
|
| 1454 |
/*
|
| 1455 |
* Since we stacked the signal on a 64-bit boundary,
|
| 1456 |
* then 'sp' should be word aligned here. If it's
|
| 1457 |
* not, then the user is trying to mess with us.
|
| 1458 |
*/
|
| 1459 |
if (env->regs[13] & 7) |
| 1460 |
goto badframe;
|
| 1461 |
|
| 1462 |
frame_addr = env->regs[13];
|
| 1463 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 1464 |
goto badframe;
|
| 1465 |
|
| 1466 |
if (__get_user(set.sig[0], &frame->sc.oldmask)) |
| 1467 |
goto badframe;
|
| 1468 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 1469 |
if (__get_user(set.sig[i], &frame->extramask[i - 1])) |
| 1470 |
goto badframe;
|
| 1471 |
} |
| 1472 |
|
| 1473 |
target_to_host_sigset_internal(&host_set, &set); |
| 1474 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
| 1475 |
|
| 1476 |
if (restore_sigcontext(env, &frame->sc))
|
| 1477 |
goto badframe;
|
| 1478 |
|
| 1479 |
#if 0
|
| 1480 |
/* Send SIGTRAP if we're single-stepping */
|
| 1481 |
if (ptrace_cancel_bpt(current))
|
| 1482 |
send_sig(SIGTRAP, current, 1);
|
| 1483 |
#endif
|
| 1484 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1485 |
return env->regs[0]; |
| 1486 |
|
| 1487 |
badframe:
|
| 1488 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1489 |
force_sig(TARGET_SIGSEGV /* , current */);
|
| 1490 |
return 0; |
| 1491 |
} |
| 1492 |
|
| 1493 |
static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr, |
| 1494 |
struct target_ucontext_v2 *uc)
|
| 1495 |
{
|
| 1496 |
sigset_t host_set; |
| 1497 |
|
| 1498 |
target_to_host_sigset(&host_set, &uc->tuc_sigmask); |
| 1499 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
| 1500 |
|
| 1501 |
if (restore_sigcontext(env, &uc->tuc_mcontext))
|
| 1502 |
return 1; |
| 1503 |
|
| 1504 |
if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) |
| 1505 |
return 1; |
| 1506 |
|
| 1507 |
#if 0
|
| 1508 |
/* Send SIGTRAP if we're single-stepping */
|
| 1509 |
if (ptrace_cancel_bpt(current))
|
| 1510 |
send_sig(SIGTRAP, current, 1);
|
| 1511 |
#endif
|
| 1512 |
|
| 1513 |
return 0; |
| 1514 |
} |
| 1515 |
|
| 1516 |
static long do_sigreturn_v2(CPUState *env) |
| 1517 |
{
|
| 1518 |
abi_ulong frame_addr; |
| 1519 |
struct sigframe_v2 *frame;
|
| 1520 |
|
| 1521 |
/*
|
| 1522 |
* Since we stacked the signal on a 64-bit boundary,
|
| 1523 |
* then 'sp' should be word aligned here. If it's
|
| 1524 |
* not, then the user is trying to mess with us.
|
| 1525 |
*/
|
| 1526 |
if (env->regs[13] & 7) |
| 1527 |
goto badframe;
|
| 1528 |
|
| 1529 |
frame_addr = env->regs[13];
|
| 1530 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 1531 |
goto badframe;
|
| 1532 |
|
| 1533 |
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
|
| 1534 |
goto badframe;
|
| 1535 |
|
| 1536 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1537 |
return env->regs[0]; |
| 1538 |
|
| 1539 |
badframe:
|
| 1540 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1541 |
force_sig(TARGET_SIGSEGV /* , current */);
|
| 1542 |
return 0; |
| 1543 |
} |
| 1544 |
|
| 1545 |
long do_sigreturn(CPUState *env)
|
| 1546 |
{
|
| 1547 |
if (get_osversion() >= 0x020612) { |
| 1548 |
return do_sigreturn_v2(env);
|
| 1549 |
} else {
|
| 1550 |
return do_sigreturn_v1(env);
|
| 1551 |
} |
| 1552 |
} |
| 1553 |
|
| 1554 |
static long do_rt_sigreturn_v1(CPUState *env) |
| 1555 |
{
|
| 1556 |
abi_ulong frame_addr; |
| 1557 |
struct rt_sigframe_v1 *frame;
|
| 1558 |
sigset_t host_set; |
| 1559 |
|
| 1560 |
/*
|
| 1561 |
* Since we stacked the signal on a 64-bit boundary,
|
| 1562 |
* then 'sp' should be word aligned here. If it's
|
| 1563 |
* not, then the user is trying to mess with us.
|
| 1564 |
*/
|
| 1565 |
if (env->regs[13] & 7) |
| 1566 |
goto badframe;
|
| 1567 |
|
| 1568 |
frame_addr = env->regs[13];
|
| 1569 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 1570 |
goto badframe;
|
| 1571 |
|
| 1572 |
target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); |
| 1573 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
| 1574 |
|
| 1575 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
|
| 1576 |
goto badframe;
|
| 1577 |
|
| 1578 |
if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) |
| 1579 |
goto badframe;
|
| 1580 |
|
| 1581 |
#if 0
|
| 1582 |
/* Send SIGTRAP if we're single-stepping */
|
| 1583 |
if (ptrace_cancel_bpt(current))
|
| 1584 |
send_sig(SIGTRAP, current, 1);
|
| 1585 |
#endif
|
| 1586 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1587 |
return env->regs[0]; |
| 1588 |
|
| 1589 |
badframe:
|
| 1590 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1591 |
force_sig(TARGET_SIGSEGV /* , current */);
|
| 1592 |
return 0; |
| 1593 |
} |
| 1594 |
|
| 1595 |
static long do_rt_sigreturn_v2(CPUState *env) |
| 1596 |
{
|
| 1597 |
abi_ulong frame_addr; |
| 1598 |
struct rt_sigframe_v2 *frame;
|
| 1599 |
|
| 1600 |
/*
|
| 1601 |
* Since we stacked the signal on a 64-bit boundary,
|
| 1602 |
* then 'sp' should be word aligned here. If it's
|
| 1603 |
* not, then the user is trying to mess with us.
|
| 1604 |
*/
|
| 1605 |
if (env->regs[13] & 7) |
| 1606 |
goto badframe;
|
| 1607 |
|
| 1608 |
frame_addr = env->regs[13];
|
| 1609 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 1610 |
goto badframe;
|
| 1611 |
|
| 1612 |
if (do_sigframe_return_v2(env, frame_addr, &frame->uc))
|
| 1613 |
goto badframe;
|
| 1614 |
|
| 1615 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1616 |
return env->regs[0]; |
| 1617 |
|
| 1618 |
badframe:
|
| 1619 |
unlock_user_struct(frame, frame_addr, 0);
|
| 1620 |
force_sig(TARGET_SIGSEGV /* , current */);
|
| 1621 |
return 0; |
| 1622 |
} |
| 1623 |
|
| 1624 |
long do_rt_sigreturn(CPUState *env)
|
| 1625 |
{
|
| 1626 |
if (get_osversion() >= 0x020612) { |
| 1627 |
return do_rt_sigreturn_v2(env);
|
| 1628 |
} else {
|
| 1629 |
return do_rt_sigreturn_v1(env);
|
| 1630 |
} |
| 1631 |
} |
| 1632 |
|
| 1633 |
#elif defined(TARGET_SPARC)
|
| 1634 |
|
| 1635 |
#define __SUNOS_MAXWIN 31 |
| 1636 |
|
| 1637 |
/* This is what SunOS does, so shall I. */
|
| 1638 |
struct target_sigcontext {
|
| 1639 |
abi_ulong sigc_onstack; /* state to restore */
|
| 1640 |
|
| 1641 |
abi_ulong sigc_mask; /* sigmask to restore */
|
| 1642 |
abi_ulong sigc_sp; /* stack pointer */
|
| 1643 |
abi_ulong sigc_pc; /* program counter */
|
| 1644 |
abi_ulong sigc_npc; /* next program counter */
|
| 1645 |
abi_ulong sigc_psr; /* for condition codes etc */
|
| 1646 |
abi_ulong sigc_g1; /* User uses these two registers */
|
| 1647 |
abi_ulong sigc_o0; /* within the trampoline code. */
|
| 1648 |
|
| 1649 |
/* Now comes information regarding the users window set
|
| 1650 |
* at the time of the signal.
|
| 1651 |
*/
|
| 1652 |
abi_ulong sigc_oswins; /* outstanding windows */
|
| 1653 |
|
| 1654 |
/* stack ptrs for each regwin buf */
|
| 1655 |
char *sigc_spbuf[__SUNOS_MAXWIN];
|
| 1656 |
|
| 1657 |
/* Windows to restore after signal */
|
| 1658 |
struct {
|
| 1659 |
abi_ulong locals[8];
|
| 1660 |
abi_ulong ins[8];
|
| 1661 |
} sigc_wbuf[__SUNOS_MAXWIN]; |
| 1662 |
}; |
| 1663 |
/* A Sparc stack frame */
|
| 1664 |
struct sparc_stackf {
|
| 1665 |
abi_ulong locals[8];
|
| 1666 |
abi_ulong ins[6];
|
| 1667 |
struct sparc_stackf *fp;
|
| 1668 |
abi_ulong callers_pc; |
| 1669 |
char *structptr;
|
| 1670 |
abi_ulong xargs[6];
|
| 1671 |
abi_ulong xxargs[1];
|
| 1672 |
}; |
| 1673 |
|
| 1674 |
typedef struct { |
| 1675 |
struct {
|
| 1676 |
abi_ulong psr; |
| 1677 |
abi_ulong pc; |
| 1678 |
abi_ulong npc; |
| 1679 |
abi_ulong y; |
| 1680 |
abi_ulong u_regs[16]; /* globals and ins */ |
| 1681 |
} si_regs; |
| 1682 |
int si_mask;
|
| 1683 |
} __siginfo_t; |
| 1684 |
|
| 1685 |
typedef struct { |
| 1686 |
unsigned long si_float_regs [32]; |
| 1687 |
unsigned long si_fsr; |
| 1688 |
unsigned long si_fpqdepth; |
| 1689 |
struct {
|
| 1690 |
unsigned long *insn_addr; |
| 1691 |
unsigned long insn; |
| 1692 |
} si_fpqueue [16];
|
| 1693 |
} qemu_siginfo_fpu_t; |
| 1694 |
|
| 1695 |
|
| 1696 |
struct target_signal_frame {
|
| 1697 |
struct sparc_stackf ss;
|
| 1698 |
__siginfo_t info; |
| 1699 |
abi_ulong fpu_save; |
| 1700 |
abi_ulong insns[2] __attribute__ ((aligned (8))); |
| 1701 |
abi_ulong extramask[TARGET_NSIG_WORDS - 1];
|
| 1702 |
abi_ulong extra_size; /* Should be 0 */
|
| 1703 |
qemu_siginfo_fpu_t fpu_state; |
| 1704 |
}; |
| 1705 |
struct target_rt_signal_frame {
|
| 1706 |
struct sparc_stackf ss;
|
| 1707 |
siginfo_t info; |
| 1708 |
abi_ulong regs[20];
|
| 1709 |
sigset_t mask; |
| 1710 |
abi_ulong fpu_save; |
| 1711 |
unsigned int insns[2]; |
| 1712 |
stack_t stack; |
| 1713 |
unsigned int extra_size; /* Should be 0 */ |
| 1714 |
qemu_siginfo_fpu_t fpu_state; |
| 1715 |
}; |
| 1716 |
|
| 1717 |
#define UREG_O0 16 |
| 1718 |
#define UREG_O6 22 |
| 1719 |
#define UREG_I0 0 |
| 1720 |
#define UREG_I1 1 |
| 1721 |
#define UREG_I2 2 |
| 1722 |
#define UREG_I3 3 |
| 1723 |
#define UREG_I4 4 |
| 1724 |
#define UREG_I5 5 |
| 1725 |
#define UREG_I6 6 |
| 1726 |
#define UREG_I7 7 |
| 1727 |
#define UREG_L0 8 |
| 1728 |
#define UREG_FP UREG_I6
|
| 1729 |
#define UREG_SP UREG_O6
|
| 1730 |
|
| 1731 |
static inline abi_ulong get_sigframe(struct target_sigaction *sa, |
| 1732 |
CPUState *env, unsigned long framesize) |
| 1733 |
{
|
| 1734 |
abi_ulong sp; |
| 1735 |
|
| 1736 |
sp = env->regwptr[UREG_FP]; |
| 1737 |
|
| 1738 |
/* This is the X/Open sanctioned signal stack switching. */
|
| 1739 |
if (sa->sa_flags & TARGET_SA_ONSTACK) {
|
| 1740 |
if (!on_sig_stack(sp)
|
| 1741 |
&& !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7))
|
| 1742 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 1743 |
} |
| 1744 |
return sp - framesize;
|
| 1745 |
} |
| 1746 |
|
| 1747 |
static int |
| 1748 |
setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask) |
| 1749 |
{
|
| 1750 |
int err = 0, i; |
| 1751 |
|
| 1752 |
err |= __put_user(env->psr, &si->si_regs.psr); |
| 1753 |
err |= __put_user(env->pc, &si->si_regs.pc); |
| 1754 |
err |= __put_user(env->npc, &si->si_regs.npc); |
| 1755 |
err |= __put_user(env->y, &si->si_regs.y); |
| 1756 |
for (i=0; i < 8; i++) { |
| 1757 |
err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]); |
| 1758 |
} |
| 1759 |
for (i=0; i < 8; i++) { |
| 1760 |
err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
|
| 1761 |
} |
| 1762 |
err |= __put_user(mask, &si->si_mask); |
| 1763 |
return err;
|
| 1764 |
} |
| 1765 |
|
| 1766 |
#if 0
|
| 1767 |
static int
|
| 1768 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
|
| 1769 |
CPUState *env, unsigned long mask)
|
| 1770 |
{
|
| 1771 |
int err = 0;
|
| 1772 |
|
| 1773 |
err |= __put_user(mask, &sc->sigc_mask);
|
| 1774 |
err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
|
| 1775 |
err |= __put_user(env->pc, &sc->sigc_pc);
|
| 1776 |
err |= __put_user(env->npc, &sc->sigc_npc);
|
| 1777 |
err |= __put_user(env->psr, &sc->sigc_psr);
|
| 1778 |
err |= __put_user(env->gregs[1], &sc->sigc_g1);
|
| 1779 |
err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
|
| 1780 |
|
| 1781 |
return err;
|
| 1782 |
}
|
| 1783 |
#endif
|
| 1784 |
#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) |
| 1785 |
|
| 1786 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 1787 |
target_sigset_t *set, CPUState *env) |
| 1788 |
{
|
| 1789 |
abi_ulong sf_addr; |
| 1790 |
struct target_signal_frame *sf;
|
| 1791 |
int sigframe_size, err, i;
|
| 1792 |
|
| 1793 |
/* 1. Make sure everything is clean */
|
| 1794 |
//synchronize_user_stack();
|
| 1795 |
|
| 1796 |
sigframe_size = NF_ALIGNEDSZ; |
| 1797 |
sf_addr = get_sigframe(ka, env, sigframe_size); |
| 1798 |
|
| 1799 |
sf = lock_user(VERIFY_WRITE, sf_addr, |
| 1800 |
sizeof(struct target_signal_frame), 0); |
| 1801 |
if (!sf)
|
| 1802 |
goto sigsegv;
|
| 1803 |
|
| 1804 |
//fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
| 1805 |
#if 0
|
| 1806 |
if (invalid_frame_pointer(sf, sigframe_size))
|
| 1807 |
goto sigill_and_return;
|
| 1808 |
#endif
|
| 1809 |
/* 2. Save the current process state */
|
| 1810 |
err = setup___siginfo(&sf->info, env, set->sig[0]);
|
| 1811 |
err |= __put_user(0, &sf->extra_size);
|
| 1812 |
|
| 1813 |
//err |= save_fpu_state(regs, &sf->fpu_state);
|
| 1814 |
//err |= __put_user(&sf->fpu_state, &sf->fpu_save);
|
| 1815 |
|
| 1816 |
err |= __put_user(set->sig[0], &sf->info.si_mask);
|
| 1817 |
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { |
| 1818 |
err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
|
| 1819 |
} |
| 1820 |
|
| 1821 |
for (i = 0; i < 8; i++) { |
| 1822 |
err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); |
| 1823 |
} |
| 1824 |
for (i = 0; i < 8; i++) { |
| 1825 |
err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); |
| 1826 |
} |
| 1827 |
if (err)
|
| 1828 |
goto sigsegv;
|
| 1829 |
|
| 1830 |
/* 3. signal handler back-trampoline and parameters */
|
| 1831 |
env->regwptr[UREG_FP] = sf_addr; |
| 1832 |
env->regwptr[UREG_I0] = sig; |
| 1833 |
env->regwptr[UREG_I1] = sf_addr + |
| 1834 |
offsetof(struct target_signal_frame, info);
|
| 1835 |
env->regwptr[UREG_I2] = sf_addr + |
| 1836 |
offsetof(struct target_signal_frame, info);
|
| 1837 |
|
| 1838 |
/* 4. signal handler */
|
| 1839 |
env->pc = ka->_sa_handler; |
| 1840 |
env->npc = (env->pc + 4);
|
| 1841 |
/* 5. return to kernel instructions */
|
| 1842 |
if (ka->sa_restorer)
|
| 1843 |
env->regwptr[UREG_I7] = ka->sa_restorer; |
| 1844 |
else {
|
| 1845 |
uint32_t val32; |
| 1846 |
|
| 1847 |
env->regwptr[UREG_I7] = sf_addr + |
| 1848 |
offsetof(struct target_signal_frame, insns) - 2 * 4; |
| 1849 |
|
| 1850 |
/* mov __NR_sigreturn, %g1 */
|
| 1851 |
val32 = 0x821020d8;
|
| 1852 |
err |= __put_user(val32, &sf->insns[0]);
|
| 1853 |
|
| 1854 |
/* t 0x10 */
|
| 1855 |
val32 = 0x91d02010;
|
| 1856 |
err |= __put_user(val32, &sf->insns[1]);
|
| 1857 |
if (err)
|
| 1858 |
goto sigsegv;
|
| 1859 |
|
| 1860 |
/* Flush instruction space. */
|
| 1861 |
//flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
|
| 1862 |
// tb_flush(env);
|
| 1863 |
} |
| 1864 |
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); |
| 1865 |
return;
|
| 1866 |
#if 0
|
| 1867 |
sigill_and_return:
|
| 1868 |
force_sig(TARGET_SIGILL);
|
| 1869 |
#endif
|
| 1870 |
sigsegv:
|
| 1871 |
//fprintf(stderr, "force_sig\n");
|
| 1872 |
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); |
| 1873 |
force_sig(TARGET_SIGSEGV); |
| 1874 |
} |
| 1875 |
static inline int |
| 1876 |
restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu) |
| 1877 |
{
|
| 1878 |
int err;
|
| 1879 |
#if 0
|
| 1880 |
#ifdef CONFIG_SMP
|
| 1881 |
if (current->flags & PF_USEDFPU)
|
| 1882 |
regs->psr &= ~PSR_EF;
|
| 1883 |
#else
|
| 1884 |
if (current == last_task_used_math) {
|
| 1885 |
last_task_used_math = 0;
|
| 1886 |
regs->psr &= ~PSR_EF; |
| 1887 |
} |
| 1888 |
#endif
|
| 1889 |
current->used_math = 1;
|
| 1890 |
current->flags &= ~PF_USEDFPU; |
| 1891 |
#endif
|
| 1892 |
#if 0
|
| 1893 |
if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
|
| 1894 |
return -EFAULT;
|
| 1895 |
#endif
|
| 1896 |
|
| 1897 |
#if 0
|
| 1898 |
/* XXX: incorrect */
|
| 1899 |
err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
|
| 1900 |
(sizeof(unsigned long) * 32));
|
| 1901 |
#endif
|
| 1902 |
err |= __get_user(env->fsr, &fpu->si_fsr); |
| 1903 |
#if 0
|
| 1904 |
err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
|
| 1905 |
if (current->thread.fpqdepth != 0)
|
| 1906 |
err |= __copy_from_user(¤t->thread.fpqueue[0],
|
| 1907 |
&fpu->si_fpqueue[0],
|
| 1908 |
((sizeof(unsigned long) +
|
| 1909 |
(sizeof(unsigned long *)))*16));
|
| 1910 |
#endif
|
| 1911 |
return err;
|
| 1912 |
} |
| 1913 |
|
| 1914 |
|
| 1915 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 1916 |
target_siginfo_t *info, |
| 1917 |
target_sigset_t *set, CPUState *env) |
| 1918 |
{
|
| 1919 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
| 1920 |
} |
| 1921 |
|
| 1922 |
long do_sigreturn(CPUState *env)
|
| 1923 |
{
|
| 1924 |
abi_ulong sf_addr; |
| 1925 |
struct target_signal_frame *sf;
|
| 1926 |
uint32_t up_psr, pc, npc; |
| 1927 |
target_sigset_t set; |
| 1928 |
sigset_t host_set; |
| 1929 |
abi_ulong fpu_save_addr; |
| 1930 |
int err, i;
|
| 1931 |
|
| 1932 |
sf_addr = env->regwptr[UREG_FP]; |
| 1933 |
if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) |
| 1934 |
goto segv_and_exit;
|
| 1935 |
#if 0
|
| 1936 |
fprintf(stderr, "sigreturn\n");
|
| 1937 |
fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
| 1938 |
#endif
|
| 1939 |
//cpu_dump_state(env, stderr, fprintf, 0);
|
| 1940 |
|
| 1941 |
/* 1. Make sure we are not getting garbage from the user */
|
| 1942 |
|
| 1943 |
if (sf_addr & 3) |
| 1944 |
goto segv_and_exit;
|
| 1945 |
|
| 1946 |
err = __get_user(pc, &sf->info.si_regs.pc); |
| 1947 |
err |= __get_user(npc, &sf->info.si_regs.npc); |
| 1948 |
|
| 1949 |
if ((pc | npc) & 3) |
| 1950 |
goto segv_and_exit;
|
| 1951 |
|
| 1952 |
/* 2. Restore the state */
|
| 1953 |
err |= __get_user(up_psr, &sf->info.si_regs.psr); |
| 1954 |
|
| 1955 |
/* User can only change condition codes and FPU enabling in %psr. */
|
| 1956 |
env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
|
| 1957 |
| (env->psr & ~(PSR_ICC /* | PSR_EF */));
|
| 1958 |
|
| 1959 |
env->pc = pc; |
| 1960 |
env->npc = npc; |
| 1961 |
err |= __get_user(env->y, &sf->info.si_regs.y); |
| 1962 |
for (i=0; i < 8; i++) { |
| 1963 |
err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); |
| 1964 |
} |
| 1965 |
for (i=0; i < 8; i++) { |
| 1966 |
err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
|
| 1967 |
} |
| 1968 |
|
| 1969 |
err |= __get_user(fpu_save_addr, &sf->fpu_save); |
| 1970 |
|
| 1971 |
//if (fpu_save)
|
| 1972 |
// err |= restore_fpu_state(env, fpu_save);
|
| 1973 |
|
| 1974 |
/* This is pretty much atomic, no amount locking would prevent
|
| 1975 |
* the races which exist anyways.
|
| 1976 |
*/
|
| 1977 |
err |= __get_user(set.sig[0], &sf->info.si_mask);
|
| 1978 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 1979 |
err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
|
| 1980 |
} |
| 1981 |
|
| 1982 |
target_to_host_sigset_internal(&host_set, &set); |
| 1983 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
| 1984 |
|
| 1985 |
if (err)
|
| 1986 |
goto segv_and_exit;
|
| 1987 |
unlock_user_struct(sf, sf_addr, 0);
|
| 1988 |
return env->regwptr[0]; |
| 1989 |
|
| 1990 |
segv_and_exit:
|
| 1991 |
unlock_user_struct(sf, sf_addr, 0);
|
| 1992 |
force_sig(TARGET_SIGSEGV); |
| 1993 |
} |
| 1994 |
|
| 1995 |
long do_rt_sigreturn(CPUState *env)
|
| 1996 |
{
|
| 1997 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
| 1998 |
return -TARGET_ENOSYS;
|
| 1999 |
} |
| 2000 |
|
| 2001 |
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
|
| 2002 |
#define MC_TSTATE 0 |
| 2003 |
#define MC_PC 1 |
| 2004 |
#define MC_NPC 2 |
| 2005 |
#define MC_Y 3 |
| 2006 |
#define MC_G1 4 |
| 2007 |
#define MC_G2 5 |
| 2008 |
#define MC_G3 6 |
| 2009 |
#define MC_G4 7 |
| 2010 |
#define MC_G5 8 |
| 2011 |
#define MC_G6 9 |
| 2012 |
#define MC_G7 10 |
| 2013 |
#define MC_O0 11 |
| 2014 |
#define MC_O1 12 |
| 2015 |
#define MC_O2 13 |
| 2016 |
#define MC_O3 14 |
| 2017 |
#define MC_O4 15 |
| 2018 |
#define MC_O5 16 |
| 2019 |
#define MC_O6 17 |
| 2020 |
#define MC_O7 18 |
| 2021 |
#define MC_NGREG 19 |
| 2022 |
|
| 2023 |
typedef abi_ulong target_mc_greg_t;
|
| 2024 |
typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG];
|
| 2025 |
|
| 2026 |
struct target_mc_fq {
|
| 2027 |
abi_ulong *mcfq_addr; |
| 2028 |
uint32_t mcfq_insn; |
| 2029 |
}; |
| 2030 |
|
| 2031 |
struct target_mc_fpu {
|
| 2032 |
union {
|
| 2033 |
uint32_t sregs[32];
|
| 2034 |
uint64_t dregs[32];
|
| 2035 |
//uint128_t qregs[16];
|
| 2036 |
} mcfpu_fregs; |
| 2037 |
abi_ulong mcfpu_fsr; |
| 2038 |
abi_ulong mcfpu_fprs; |
| 2039 |
abi_ulong mcfpu_gsr; |
| 2040 |
struct target_mc_fq *mcfpu_fq;
|
| 2041 |
unsigned char mcfpu_qcnt; |
| 2042 |
unsigned char mcfpu_qentsz; |
| 2043 |
unsigned char mcfpu_enab; |
| 2044 |
}; |
| 2045 |
typedef struct target_mc_fpu target_mc_fpu_t; |
| 2046 |
|
| 2047 |
typedef struct { |
| 2048 |
target_mc_gregset_t mc_gregs; |
| 2049 |
target_mc_greg_t mc_fp; |
| 2050 |
target_mc_greg_t mc_i7; |
| 2051 |
target_mc_fpu_t mc_fpregs; |
| 2052 |
} target_mcontext_t; |
| 2053 |
|
| 2054 |
struct target_ucontext {
|
| 2055 |
struct target_ucontext *tuc_link;
|
| 2056 |
abi_ulong tuc_flags; |
| 2057 |
target_sigset_t tuc_sigmask; |
| 2058 |
target_mcontext_t tuc_mcontext; |
| 2059 |
}; |
| 2060 |
|
| 2061 |
/* A V9 register window */
|
| 2062 |
struct target_reg_window {
|
| 2063 |
abi_ulong locals[8];
|
| 2064 |
abi_ulong ins[8];
|
| 2065 |
}; |
| 2066 |
|
| 2067 |
#define TARGET_STACK_BIAS 2047 |
| 2068 |
|
| 2069 |
/* {set, get}context() needed for 64-bit SparcLinux userland. */
|
| 2070 |
void sparc64_set_context(CPUSPARCState *env)
|
| 2071 |
{
|
| 2072 |
abi_ulong ucp_addr; |
| 2073 |
struct target_ucontext *ucp;
|
| 2074 |
target_mc_gregset_t *grp; |
| 2075 |
abi_ulong pc, npc, tstate; |
| 2076 |
abi_ulong fp, i7, w_addr; |
| 2077 |
unsigned char fenab; |
| 2078 |
int err;
|
| 2079 |
unsigned int i; |
| 2080 |
|
| 2081 |
ucp_addr = env->regwptr[UREG_I0]; |
| 2082 |
if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) |
| 2083 |
goto do_sigsegv;
|
| 2084 |
grp = &ucp->tuc_mcontext.mc_gregs; |
| 2085 |
err = __get_user(pc, &((*grp)[MC_PC])); |
| 2086 |
err |= __get_user(npc, &((*grp)[MC_NPC])); |
| 2087 |
if (err || ((pc | npc) & 3)) |
| 2088 |
goto do_sigsegv;
|
| 2089 |
if (env->regwptr[UREG_I1]) {
|
| 2090 |
target_sigset_t target_set; |
| 2091 |
sigset_t set; |
| 2092 |
|
| 2093 |
if (TARGET_NSIG_WORDS == 1) { |
| 2094 |
if (__get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0])) |
| 2095 |
goto do_sigsegv;
|
| 2096 |
} else {
|
| 2097 |
abi_ulong *src, *dst; |
| 2098 |
src = ucp->tuc_sigmask.sig; |
| 2099 |
dst = target_set.sig; |
| 2100 |
for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); |
| 2101 |
i++, dst++, src++) |
| 2102 |
err |= __get_user(*dst, src); |
| 2103 |
if (err)
|
| 2104 |
goto do_sigsegv;
|
| 2105 |
} |
| 2106 |
target_to_host_sigset_internal(&set, &target_set); |
| 2107 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 2108 |
} |
| 2109 |
env->pc = pc; |
| 2110 |
env->npc = npc; |
| 2111 |
err |= __get_user(env->y, &((*grp)[MC_Y])); |
| 2112 |
err |= __get_user(tstate, &((*grp)[MC_TSTATE])); |
| 2113 |
env->asi = (tstate >> 24) & 0xff; |
| 2114 |
cpu_put_ccr(env, tstate >> 32);
|
| 2115 |
cpu_put_cwp64(env, tstate & 0x1f);
|
| 2116 |
err |= __get_user(env->gregs[1], (&(*grp)[MC_G1]));
|
| 2117 |
err |= __get_user(env->gregs[2], (&(*grp)[MC_G2]));
|
| 2118 |
err |= __get_user(env->gregs[3], (&(*grp)[MC_G3]));
|
| 2119 |
err |= __get_user(env->gregs[4], (&(*grp)[MC_G4]));
|
| 2120 |
err |= __get_user(env->gregs[5], (&(*grp)[MC_G5]));
|
| 2121 |
err |= __get_user(env->gregs[6], (&(*grp)[MC_G6]));
|
| 2122 |
err |= __get_user(env->gregs[7], (&(*grp)[MC_G7]));
|
| 2123 |
err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0])); |
| 2124 |
err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1])); |
| 2125 |
err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2])); |
| 2126 |
err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3])); |
| 2127 |
err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4])); |
| 2128 |
err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5])); |
| 2129 |
err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6])); |
| 2130 |
err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7])); |
| 2131 |
|
| 2132 |
err |= __get_user(fp, &(ucp->tuc_mcontext.mc_fp)); |
| 2133 |
err |= __get_user(i7, &(ucp->tuc_mcontext.mc_i7)); |
| 2134 |
|
| 2135 |
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; |
| 2136 |
if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), |
| 2137 |
abi_ulong) != 0)
|
| 2138 |
goto do_sigsegv;
|
| 2139 |
if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), |
| 2140 |
abi_ulong) != 0)
|
| 2141 |
goto do_sigsegv;
|
| 2142 |
err |= __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab)); |
| 2143 |
err |= __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs)); |
| 2144 |
{
|
| 2145 |
uint32_t *src, *dst; |
| 2146 |
src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs; |
| 2147 |
dst = env->fpr; |
| 2148 |
/* XXX: check that the CPU storage is the same as user context */
|
| 2149 |
for (i = 0; i < 64; i++, dst++, src++) |
| 2150 |
err |= __get_user(*dst, src); |
| 2151 |
} |
| 2152 |
err |= __get_user(env->fsr, |
| 2153 |
&(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr)); |
| 2154 |
err |= __get_user(env->gsr, |
| 2155 |
&(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr)); |
| 2156 |
if (err)
|
| 2157 |
goto do_sigsegv;
|
| 2158 |
unlock_user_struct(ucp, ucp_addr, 0);
|
| 2159 |
return;
|
| 2160 |
do_sigsegv:
|
| 2161 |
unlock_user_struct(ucp, ucp_addr, 0);
|
| 2162 |
force_sig(TARGET_SIGSEGV); |
| 2163 |
} |
| 2164 |
|
| 2165 |
void sparc64_get_context(CPUSPARCState *env)
|
| 2166 |
{
|
| 2167 |
abi_ulong ucp_addr; |
| 2168 |
struct target_ucontext *ucp;
|
| 2169 |
target_mc_gregset_t *grp; |
| 2170 |
target_mcontext_t *mcp; |
| 2171 |
abi_ulong fp, i7, w_addr; |
| 2172 |
int err;
|
| 2173 |
unsigned int i; |
| 2174 |
target_sigset_t target_set; |
| 2175 |
sigset_t set; |
| 2176 |
|
| 2177 |
ucp_addr = env->regwptr[UREG_I0]; |
| 2178 |
if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) |
| 2179 |
goto do_sigsegv;
|
| 2180 |
|
| 2181 |
mcp = &ucp->tuc_mcontext; |
| 2182 |
grp = &mcp->mc_gregs; |
| 2183 |
|
| 2184 |
/* Skip over the trap instruction, first. */
|
| 2185 |
env->pc = env->npc; |
| 2186 |
env->npc += 4;
|
| 2187 |
|
| 2188 |
err = 0;
|
| 2189 |
|
| 2190 |
sigprocmask(0, NULL, &set); |
| 2191 |
host_to_target_sigset_internal(&target_set, &set); |
| 2192 |
if (TARGET_NSIG_WORDS == 1) { |
| 2193 |
err |= __put_user(target_set.sig[0],
|
| 2194 |
(abi_ulong *)&ucp->tuc_sigmask); |
| 2195 |
} else {
|
| 2196 |
abi_ulong *src, *dst; |
| 2197 |
src = target_set.sig; |
| 2198 |
dst = ucp->tuc_sigmask.sig; |
| 2199 |
for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); |
| 2200 |
i++, dst++, src++) |
| 2201 |
err |= __put_user(*src, dst); |
| 2202 |
if (err)
|
| 2203 |
goto do_sigsegv;
|
| 2204 |
} |
| 2205 |
|
| 2206 |
/* XXX: tstate must be saved properly */
|
| 2207 |
// err |= __put_user(env->tstate, &((*grp)[MC_TSTATE]));
|
| 2208 |
err |= __put_user(env->pc, &((*grp)[MC_PC])); |
| 2209 |
err |= __put_user(env->npc, &((*grp)[MC_NPC])); |
| 2210 |
err |= __put_user(env->y, &((*grp)[MC_Y])); |
| 2211 |
err |= __put_user(env->gregs[1], &((*grp)[MC_G1]));
|
| 2212 |
err |= __put_user(env->gregs[2], &((*grp)[MC_G2]));
|
| 2213 |
err |= __put_user(env->gregs[3], &((*grp)[MC_G3]));
|
| 2214 |
err |= __put_user(env->gregs[4], &((*grp)[MC_G4]));
|
| 2215 |
err |= __put_user(env->gregs[5], &((*grp)[MC_G5]));
|
| 2216 |
err |= __put_user(env->gregs[6], &((*grp)[MC_G6]));
|
| 2217 |
err |= __put_user(env->gregs[7], &((*grp)[MC_G7]));
|
| 2218 |
err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0])); |
| 2219 |
err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1])); |
| 2220 |
err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2])); |
| 2221 |
err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3])); |
| 2222 |
err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4])); |
| 2223 |
err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5])); |
| 2224 |
err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6])); |
| 2225 |
err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7])); |
| 2226 |
|
| 2227 |
w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; |
| 2228 |
fp = i7 = 0;
|
| 2229 |
if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), |
| 2230 |
abi_ulong) != 0)
|
| 2231 |
goto do_sigsegv;
|
| 2232 |
if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), |
| 2233 |
abi_ulong) != 0)
|
| 2234 |
goto do_sigsegv;
|
| 2235 |
err |= __put_user(fp, &(mcp->mc_fp)); |
| 2236 |
err |= __put_user(i7, &(mcp->mc_i7)); |
| 2237 |
|
| 2238 |
{
|
| 2239 |
uint32_t *src, *dst; |
| 2240 |
src = env->fpr; |
| 2241 |
dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs; |
| 2242 |
/* XXX: check that the CPU storage is the same as user context */
|
| 2243 |
for (i = 0; i < 64; i++, dst++, src++) |
| 2244 |
err |= __put_user(*src, dst); |
| 2245 |
} |
| 2246 |
err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr)); |
| 2247 |
err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr)); |
| 2248 |
err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs)); |
| 2249 |
|
| 2250 |
if (err)
|
| 2251 |
goto do_sigsegv;
|
| 2252 |
unlock_user_struct(ucp, ucp_addr, 1);
|
| 2253 |
return;
|
| 2254 |
do_sigsegv:
|
| 2255 |
unlock_user_struct(ucp, ucp_addr, 1);
|
| 2256 |
force_sig(TARGET_SIGSEGV); |
| 2257 |
} |
| 2258 |
#endif
|
| 2259 |
#elif defined(TARGET_ABI_MIPSN64)
|
| 2260 |
|
| 2261 |
# warning signal handling not implemented
|
| 2262 |
|
| 2263 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 2264 |
target_sigset_t *set, CPUState *env) |
| 2265 |
{
|
| 2266 |
fprintf(stderr, "setup_frame: not implemented\n");
|
| 2267 |
} |
| 2268 |
|
| 2269 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 2270 |
target_siginfo_t *info, |
| 2271 |
target_sigset_t *set, CPUState *env) |
| 2272 |
{
|
| 2273 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
| 2274 |
} |
| 2275 |
|
| 2276 |
long do_sigreturn(CPUState *env)
|
| 2277 |
{
|
| 2278 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
| 2279 |
return -TARGET_ENOSYS;
|
| 2280 |
} |
| 2281 |
|
| 2282 |
long do_rt_sigreturn(CPUState *env)
|
| 2283 |
{
|
| 2284 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
| 2285 |
return -TARGET_ENOSYS;
|
| 2286 |
} |
| 2287 |
|
| 2288 |
#elif defined(TARGET_ABI_MIPSN32)
|
| 2289 |
|
| 2290 |
# warning signal handling not implemented
|
| 2291 |
|
| 2292 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 2293 |
target_sigset_t *set, CPUState *env) |
| 2294 |
{
|
| 2295 |
fprintf(stderr, "setup_frame: not implemented\n");
|
| 2296 |
} |
| 2297 |
|
| 2298 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 2299 |
target_siginfo_t *info, |
| 2300 |
target_sigset_t *set, CPUState *env) |
| 2301 |
{
|
| 2302 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
| 2303 |
} |
| 2304 |
|
| 2305 |
long do_sigreturn(CPUState *env)
|
| 2306 |
{
|
| 2307 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
| 2308 |
return -TARGET_ENOSYS;
|
| 2309 |
} |
| 2310 |
|
| 2311 |
long do_rt_sigreturn(CPUState *env)
|
| 2312 |
{
|
| 2313 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
| 2314 |
return -TARGET_ENOSYS;
|
| 2315 |
} |
| 2316 |
|
| 2317 |
#elif defined(TARGET_ABI_MIPSO32)
|
| 2318 |
|
| 2319 |
struct target_sigcontext {
|
| 2320 |
uint32_t sc_regmask; /* Unused */
|
| 2321 |
uint32_t sc_status; |
| 2322 |
uint64_t sc_pc; |
| 2323 |
uint64_t sc_regs[32];
|
| 2324 |
uint64_t sc_fpregs[32];
|
| 2325 |
uint32_t sc_ownedfp; /* Unused */
|
| 2326 |
uint32_t sc_fpc_csr; |
| 2327 |
uint32_t sc_fpc_eir; /* Unused */
|
| 2328 |
uint32_t sc_used_math; |
| 2329 |
uint32_t sc_dsp; /* dsp status, was sc_ssflags */
|
| 2330 |
uint32_t pad0; |
| 2331 |
uint64_t sc_mdhi; |
| 2332 |
uint64_t sc_mdlo; |
| 2333 |
target_ulong sc_hi1; /* Was sc_cause */
|
| 2334 |
target_ulong sc_lo1; /* Was sc_badvaddr */
|
| 2335 |
target_ulong sc_hi2; /* Was sc_sigset[4] */
|
| 2336 |
target_ulong sc_lo2; |
| 2337 |
target_ulong sc_hi3; |
| 2338 |
target_ulong sc_lo3; |
| 2339 |
}; |
| 2340 |
|
| 2341 |
struct sigframe {
|
| 2342 |
uint32_t sf_ass[4]; /* argument save space for o32 */ |
| 2343 |
uint32_t sf_code[2]; /* signal trampoline */ |
| 2344 |
struct target_sigcontext sf_sc;
|
| 2345 |
target_sigset_t sf_mask; |
| 2346 |
}; |
| 2347 |
|
| 2348 |
struct target_ucontext {
|
| 2349 |
target_ulong tuc_flags; |
| 2350 |
target_ulong tuc_link; |
| 2351 |
target_stack_t tuc_stack; |
| 2352 |
target_ulong pad0; |
| 2353 |
struct target_sigcontext tuc_mcontext;
|
| 2354 |
target_sigset_t tuc_sigmask; |
| 2355 |
}; |
| 2356 |
|
| 2357 |
struct target_rt_sigframe {
|
| 2358 |
uint32_t rs_ass[4]; /* argument save space for o32 */ |
| 2359 |
uint32_t rs_code[2]; /* signal trampoline */ |
| 2360 |
struct target_siginfo rs_info;
|
| 2361 |
struct target_ucontext rs_uc;
|
| 2362 |
}; |
| 2363 |
|
| 2364 |
/* Install trampoline to jump back from signal handler */
|
| 2365 |
static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall) |
| 2366 |
{
|
| 2367 |
int err;
|
| 2368 |
|
| 2369 |
/*
|
| 2370 |
* Set up the return code ...
|
| 2371 |
*
|
| 2372 |
* li v0, __NR__foo_sigreturn
|
| 2373 |
* syscall
|
| 2374 |
*/
|
| 2375 |
|
| 2376 |
err = __put_user(0x24020000 + syscall, tramp + 0); |
| 2377 |
err |= __put_user(0x0000000c , tramp + 1); |
| 2378 |
/* flush_cache_sigtramp((unsigned long) tramp); */
|
| 2379 |
return err;
|
| 2380 |
} |
| 2381 |
|
| 2382 |
static inline int |
| 2383 |
setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
|
| 2384 |
{
|
| 2385 |
int err = 0; |
| 2386 |
|
| 2387 |
err |= __put_user(regs->active_tc.PC, &sc->sc_pc); |
| 2388 |
|
| 2389 |
#define save_gp_reg(i) do { \ |
| 2390 |
err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ |
| 2391 |
} while(0) |
| 2392 |
__put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2); |
| 2393 |
save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6); |
| 2394 |
save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10); |
| 2395 |
save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14); |
| 2396 |
save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18); |
| 2397 |
save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22); |
| 2398 |
save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26); |
| 2399 |
save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30); |
| 2400 |
save_gp_reg(31);
|
| 2401 |
#undef save_gp_reg
|
| 2402 |
|
| 2403 |
err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
| 2404 |
err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
| 2405 |
|
| 2406 |
/* Not used yet, but might be useful if we ever have DSP suppport */
|
| 2407 |
#if 0
|
| 2408 |
if (cpu_has_dsp) {
|
| 2409 |
err |= __put_user(mfhi1(), &sc->sc_hi1);
|
| 2410 |
err |= __put_user(mflo1(), &sc->sc_lo1);
|
| 2411 |
err |= __put_user(mfhi2(), &sc->sc_hi2);
|
| 2412 |
err |= __put_user(mflo2(), &sc->sc_lo2);
|
| 2413 |
err |= __put_user(mfhi3(), &sc->sc_hi3);
|
| 2414 |
err |= __put_user(mflo3(), &sc->sc_lo3);
|
| 2415 |
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
|
| 2416 |
}
|
| 2417 |
/* same with 64 bit */
|
| 2418 |
#ifdef CONFIG_64BIT
|
| 2419 |
err |= __put_user(regs->hi, &sc->sc_hi[0]);
|
| 2420 |
err |= __put_user(regs->lo, &sc->sc_lo[0]);
|
| 2421 |
if (cpu_has_dsp) {
|
| 2422 |
err |= __put_user(mfhi1(), &sc->sc_hi[1]);
|
| 2423 |
err |= __put_user(mflo1(), &sc->sc_lo[1]);
|
| 2424 |
err |= __put_user(mfhi2(), &sc->sc_hi[2]);
|
| 2425 |
err |= __put_user(mflo2(), &sc->sc_lo[2]);
|
| 2426 |
err |= __put_user(mfhi3(), &sc->sc_hi[3]);
|
| 2427 |
err |= __put_user(mflo3(), &sc->sc_lo[3]);
|
| 2428 |
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
|
| 2429 |
}
|
| 2430 |
#endif
|
| 2431 |
#endif
|
| 2432 |
|
| 2433 |
#if 0
|
| 2434 |
err |= __put_user(!!used_math(), &sc->sc_used_math);
|
| 2435 |
|
| 2436 |
if (!used_math())
|
| 2437 |
goto out;
|
| 2438 |
|
| 2439 |
/*
|
| 2440 |
* Save FPU state to signal context. Signal handler will "inherit"
|
| 2441 |
* current FPU state.
|
| 2442 |
*/
|
| 2443 |
preempt_disable();
|
| 2444 |
|
| 2445 |
if (!is_fpu_owner()) {
|
| 2446 |
own_fpu();
|
| 2447 |
restore_fp(current);
|
| 2448 |
}
|
| 2449 |
err |= save_fp_context(sc);
|
| 2450 |
|
| 2451 |
preempt_enable();
|
| 2452 |
out:
|
| 2453 |
#endif
|
| 2454 |
return err;
|
| 2455 |
} |
| 2456 |
|
| 2457 |
static inline int |
| 2458 |
restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
|
| 2459 |
{
|
| 2460 |
int err = 0; |
| 2461 |
|
| 2462 |
err |= __get_user(regs->CP0_EPC, &sc->sc_pc); |
| 2463 |
|
| 2464 |
err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
| 2465 |
err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
| 2466 |
|
| 2467 |
#define restore_gp_reg(i) do { \ |
| 2468 |
err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ |
| 2469 |
} while(0) |
| 2470 |
restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3); |
| 2471 |
restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6); |
| 2472 |
restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9); |
| 2473 |
restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12); |
| 2474 |
restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15); |
| 2475 |
restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18); |
| 2476 |
restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21); |
| 2477 |
restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24); |
| 2478 |
restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27); |
| 2479 |
restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30); |
| 2480 |
restore_gp_reg(31);
|
| 2481 |
#undef restore_gp_reg
|
| 2482 |
|
| 2483 |
#if 0
|
| 2484 |
if (cpu_has_dsp) {
|
| 2485 |
err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
|
| 2486 |
err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
|
| 2487 |
err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
|
| 2488 |
err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
|
| 2489 |
err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
|
| 2490 |
err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
|
| 2491 |
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
|
| 2492 |
}
|
| 2493 |
#ifdef CONFIG_64BIT
|
| 2494 |
err |= __get_user(regs->hi, &sc->sc_hi[0]);
|
| 2495 |
err |= __get_user(regs->lo, &sc->sc_lo[0]);
|
| 2496 |
if (cpu_has_dsp) {
|
| 2497 |
err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
|
| 2498 |
err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
|
| 2499 |
err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
|
| 2500 |
err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
|
| 2501 |
err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
|
| 2502 |
err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
|
| 2503 |
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
|
| 2504 |
}
|
| 2505 |
#endif
|
| 2506 |
|
| 2507 |
err |= __get_user(used_math, &sc->sc_used_math); |
| 2508 |
conditional_used_math(used_math); |
| 2509 |
|
| 2510 |
preempt_disable(); |
| 2511 |
|
| 2512 |
if (used_math()) {
|
| 2513 |
/* restore fpu context if we have used it before */
|
| 2514 |
own_fpu(); |
| 2515 |
err |= restore_fp_context(sc); |
| 2516 |
} else {
|
| 2517 |
/* signal handler may have used FPU. Give it up. */
|
| 2518 |
lose_fpu(); |
| 2519 |
} |
| 2520 |
|
| 2521 |
preempt_enable(); |
| 2522 |
#endif
|
| 2523 |
return err;
|
| 2524 |
} |
| 2525 |
/*
|
| 2526 |
* Determine which stack to use..
|
| 2527 |
*/
|
| 2528 |
static inline abi_ulong |
| 2529 |
get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
|
| 2530 |
{
|
| 2531 |
unsigned long sp; |
| 2532 |
|
| 2533 |
/* Default to using normal stack */
|
| 2534 |
sp = regs->active_tc.gpr[29];
|
| 2535 |
|
| 2536 |
/*
|
| 2537 |
* FPU emulator may have it's own trampoline active just
|
| 2538 |
* above the user stack, 16-bytes before the next lowest
|
| 2539 |
* 16 byte boundary. Try to avoid trashing it.
|
| 2540 |
*/
|
| 2541 |
sp -= 32;
|
| 2542 |
|
| 2543 |
/* This is the X/Open sanctioned signal stack switching. */
|
| 2544 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { |
| 2545 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 2546 |
} |
| 2547 |
|
| 2548 |
return (sp - frame_size) & ~7; |
| 2549 |
} |
| 2550 |
|
| 2551 |
/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
|
| 2552 |
static void setup_frame(int sig, struct target_sigaction * ka, |
| 2553 |
target_sigset_t *set, CPUState *regs) |
| 2554 |
{
|
| 2555 |
struct sigframe *frame;
|
| 2556 |
abi_ulong frame_addr; |
| 2557 |
int i;
|
| 2558 |
|
| 2559 |
frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
| 2560 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 2561 |
goto give_sigsegv;
|
| 2562 |
|
| 2563 |
install_sigtramp(frame->sf_code, TARGET_NR_sigreturn); |
| 2564 |
|
| 2565 |
if(setup_sigcontext(regs, &frame->sf_sc))
|
| 2566 |
goto give_sigsegv;
|
| 2567 |
|
| 2568 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 2569 |
if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
|
| 2570 |
goto give_sigsegv;
|
| 2571 |
} |
| 2572 |
|
| 2573 |
/*
|
| 2574 |
* Arguments to signal handler:
|
| 2575 |
*
|
| 2576 |
* a0 = signal number
|
| 2577 |
* a1 = 0 (should be cause)
|
| 2578 |
* a2 = pointer to struct sigcontext
|
| 2579 |
*
|
| 2580 |
* $25 and PC point to the signal handler, $29 points to the
|
| 2581 |
* struct sigframe.
|
| 2582 |
*/
|
| 2583 |
regs->active_tc.gpr[ 4] = sig;
|
| 2584 |
regs->active_tc.gpr[ 5] = 0; |
| 2585 |
regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc); |
| 2586 |
regs->active_tc.gpr[29] = frame_addr;
|
| 2587 |
regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code); |
| 2588 |
/* The original kernel code sets CP0_EPC to the handler
|
| 2589 |
* since it returns to userland using eret
|
| 2590 |
* we cannot do this here, and we must set PC directly */
|
| 2591 |
regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
|
| 2592 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2593 |
return;
|
| 2594 |
|
| 2595 |
give_sigsegv:
|
| 2596 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2597 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
| 2598 |
return;
|
| 2599 |
} |
| 2600 |
|
| 2601 |
long do_sigreturn(CPUState *regs)
|
| 2602 |
{
|
| 2603 |
struct sigframe *frame;
|
| 2604 |
abi_ulong frame_addr; |
| 2605 |
sigset_t blocked; |
| 2606 |
target_sigset_t target_set; |
| 2607 |
int i;
|
| 2608 |
|
| 2609 |
#if defined(DEBUG_SIGNAL)
|
| 2610 |
fprintf(stderr, "do_sigreturn\n");
|
| 2611 |
#endif
|
| 2612 |
frame_addr = regs->active_tc.gpr[29];
|
| 2613 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 2614 |
goto badframe;
|
| 2615 |
|
| 2616 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 2617 |
if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
|
| 2618 |
goto badframe;
|
| 2619 |
} |
| 2620 |
|
| 2621 |
target_to_host_sigset_internal(&blocked, &target_set); |
| 2622 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
| 2623 |
|
| 2624 |
if (restore_sigcontext(regs, &frame->sf_sc))
|
| 2625 |
goto badframe;
|
| 2626 |
|
| 2627 |
#if 0
|
| 2628 |
/*
|
| 2629 |
* Don't let your children do this ...
|
| 2630 |
*/
|
| 2631 |
__asm__ __volatile__(
|
| 2632 |
"move\t$29, %0\n\t"
|
| 2633 |
"j\tsyscall_exit"
|
| 2634 |
:/* no outputs */
|
| 2635 |
:"r" (®s));
|
| 2636 |
/* Unreached */
|
| 2637 |
#endif
|
| 2638 |
|
| 2639 |
regs->active_tc.PC = regs->CP0_EPC; |
| 2640 |
/* I am not sure this is right, but it seems to work
|
| 2641 |
* maybe a problem with nested signals ? */
|
| 2642 |
regs->CP0_EPC = 0;
|
| 2643 |
return -TARGET_QEMU_ESIGRETURN;
|
| 2644 |
|
| 2645 |
badframe:
|
| 2646 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
| 2647 |
return 0; |
| 2648 |
} |
| 2649 |
|
| 2650 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 2651 |
target_siginfo_t *info, |
| 2652 |
target_sigset_t *set, CPUState *env) |
| 2653 |
{
|
| 2654 |
struct target_rt_sigframe *frame;
|
| 2655 |
abi_ulong frame_addr; |
| 2656 |
int i;
|
| 2657 |
|
| 2658 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
| 2659 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 2660 |
goto give_sigsegv;
|
| 2661 |
|
| 2662 |
install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn); |
| 2663 |
|
| 2664 |
copy_siginfo_to_user(&frame->rs_info, info); |
| 2665 |
|
| 2666 |
__put_user(0, &frame->rs_uc.tuc_flags);
|
| 2667 |
__put_user(0, &frame->rs_uc.tuc_link);
|
| 2668 |
__put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp); |
| 2669 |
__put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size); |
| 2670 |
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), |
| 2671 |
&frame->rs_uc.tuc_stack.ss_flags); |
| 2672 |
|
| 2673 |
setup_sigcontext(env, &frame->rs_uc.tuc_mcontext); |
| 2674 |
|
| 2675 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 2676 |
__put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]); |
| 2677 |
} |
| 2678 |
|
| 2679 |
/*
|
| 2680 |
* Arguments to signal handler:
|
| 2681 |
*
|
| 2682 |
* a0 = signal number
|
| 2683 |
* a1 = pointer to struct siginfo
|
| 2684 |
* a2 = pointer to struct ucontext
|
| 2685 |
*
|
| 2686 |
* $25 and PC point to the signal handler, $29 points to the
|
| 2687 |
* struct sigframe.
|
| 2688 |
*/
|
| 2689 |
env->active_tc.gpr[ 4] = sig;
|
| 2690 |
env->active_tc.gpr[ 5] = frame_addr
|
| 2691 |
+ offsetof(struct target_rt_sigframe, rs_info);
|
| 2692 |
env->active_tc.gpr[ 6] = frame_addr
|
| 2693 |
+ offsetof(struct target_rt_sigframe, rs_uc);
|
| 2694 |
env->active_tc.gpr[29] = frame_addr;
|
| 2695 |
env->active_tc.gpr[31] = frame_addr
|
| 2696 |
+ offsetof(struct target_rt_sigframe, rs_code);
|
| 2697 |
/* The original kernel code sets CP0_EPC to the handler
|
| 2698 |
* since it returns to userland using eret
|
| 2699 |
* we cannot do this here, and we must set PC directly */
|
| 2700 |
env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
|
| 2701 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2702 |
return;
|
| 2703 |
|
| 2704 |
give_sigsegv:
|
| 2705 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2706 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
| 2707 |
return;
|
| 2708 |
} |
| 2709 |
|
| 2710 |
long do_rt_sigreturn(CPUState *env)
|
| 2711 |
{
|
| 2712 |
struct target_rt_sigframe *frame;
|
| 2713 |
abi_ulong frame_addr; |
| 2714 |
sigset_t blocked; |
| 2715 |
|
| 2716 |
#if defined(DEBUG_SIGNAL)
|
| 2717 |
fprintf(stderr, "do_rt_sigreturn\n");
|
| 2718 |
#endif
|
| 2719 |
frame_addr = env->active_tc.gpr[29];
|
| 2720 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 2721 |
goto badframe;
|
| 2722 |
|
| 2723 |
target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask); |
| 2724 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
| 2725 |
|
| 2726 |
if (restore_sigcontext(env, &frame->rs_uc.tuc_mcontext))
|
| 2727 |
goto badframe;
|
| 2728 |
|
| 2729 |
if (do_sigaltstack(frame_addr +
|
| 2730 |
offsetof(struct target_rt_sigframe, rs_uc.tuc_stack),
|
| 2731 |
0, get_sp_from_cpustate(env)) == -EFAULT)
|
| 2732 |
goto badframe;
|
| 2733 |
|
| 2734 |
env->active_tc.PC = env->CP0_EPC; |
| 2735 |
/* I am not sure this is right, but it seems to work
|
| 2736 |
* maybe a problem with nested signals ? */
|
| 2737 |
env->CP0_EPC = 0;
|
| 2738 |
return -TARGET_QEMU_ESIGRETURN;
|
| 2739 |
|
| 2740 |
badframe:
|
| 2741 |
force_sig(TARGET_SIGSEGV/*, current*/);
|
| 2742 |
return 0; |
| 2743 |
} |
| 2744 |
|
| 2745 |
#elif defined(TARGET_SH4)
|
| 2746 |
|
| 2747 |
/*
|
| 2748 |
* code and data structures from linux kernel:
|
| 2749 |
* include/asm-sh/sigcontext.h
|
| 2750 |
* arch/sh/kernel/signal.c
|
| 2751 |
*/
|
| 2752 |
|
| 2753 |
struct target_sigcontext {
|
| 2754 |
target_ulong oldmask; |
| 2755 |
|
| 2756 |
/* CPU registers */
|
| 2757 |
target_ulong sc_gregs[16];
|
| 2758 |
target_ulong sc_pc; |
| 2759 |
target_ulong sc_pr; |
| 2760 |
target_ulong sc_sr; |
| 2761 |
target_ulong sc_gbr; |
| 2762 |
target_ulong sc_mach; |
| 2763 |
target_ulong sc_macl; |
| 2764 |
|
| 2765 |
/* FPU registers */
|
| 2766 |
target_ulong sc_fpregs[16];
|
| 2767 |
target_ulong sc_xfpregs[16];
|
| 2768 |
unsigned int sc_fpscr; |
| 2769 |
unsigned int sc_fpul; |
| 2770 |
unsigned int sc_ownedfp; |
| 2771 |
}; |
| 2772 |
|
| 2773 |
struct target_sigframe
|
| 2774 |
{
|
| 2775 |
struct target_sigcontext sc;
|
| 2776 |
target_ulong extramask[TARGET_NSIG_WORDS-1];
|
| 2777 |
uint16_t retcode[3];
|
| 2778 |
}; |
| 2779 |
|
| 2780 |
|
| 2781 |
struct target_ucontext {
|
| 2782 |
target_ulong tuc_flags; |
| 2783 |
struct target_ucontext *tuc_link;
|
| 2784 |
target_stack_t tuc_stack; |
| 2785 |
struct target_sigcontext tuc_mcontext;
|
| 2786 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
| 2787 |
}; |
| 2788 |
|
| 2789 |
struct target_rt_sigframe
|
| 2790 |
{
|
| 2791 |
struct target_siginfo info;
|
| 2792 |
struct target_ucontext uc;
|
| 2793 |
uint16_t retcode[3];
|
| 2794 |
}; |
| 2795 |
|
| 2796 |
|
| 2797 |
#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */ |
| 2798 |
#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */ |
| 2799 |
|
| 2800 |
static abi_ulong get_sigframe(struct target_sigaction *ka, |
| 2801 |
unsigned long sp, size_t frame_size) |
| 2802 |
{
|
| 2803 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) { |
| 2804 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 2805 |
} |
| 2806 |
|
| 2807 |
return (sp - frame_size) & -8ul; |
| 2808 |
} |
| 2809 |
|
| 2810 |
static int setup_sigcontext(struct target_sigcontext *sc, |
| 2811 |
CPUState *regs, unsigned long mask) |
| 2812 |
{
|
| 2813 |
int err = 0; |
| 2814 |
int i;
|
| 2815 |
|
| 2816 |
#define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) |
| 2817 |
COPY(gregs[0]); COPY(gregs[1]); |
| 2818 |
COPY(gregs[2]); COPY(gregs[3]); |
| 2819 |
COPY(gregs[4]); COPY(gregs[5]); |
| 2820 |
COPY(gregs[6]); COPY(gregs[7]); |
| 2821 |
COPY(gregs[8]); COPY(gregs[9]); |
| 2822 |
COPY(gregs[10]); COPY(gregs[11]); |
| 2823 |
COPY(gregs[12]); COPY(gregs[13]); |
| 2824 |
COPY(gregs[14]); COPY(gregs[15]); |
| 2825 |
COPY(gbr); COPY(mach); |
| 2826 |
COPY(macl); COPY(pr); |
| 2827 |
COPY(sr); COPY(pc); |
| 2828 |
#undef COPY
|
| 2829 |
|
| 2830 |
for (i=0; i<16; i++) { |
| 2831 |
err |= __put_user(regs->fregs[i], &sc->sc_fpregs[i]); |
| 2832 |
} |
| 2833 |
err |= __put_user(regs->fpscr, &sc->sc_fpscr); |
| 2834 |
err |= __put_user(regs->fpul, &sc->sc_fpul); |
| 2835 |
|
| 2836 |
/* non-iBCS2 extensions.. */
|
| 2837 |
err |= __put_user(mask, &sc->oldmask); |
| 2838 |
|
| 2839 |
return err;
|
| 2840 |
} |
| 2841 |
|
| 2842 |
static int restore_sigcontext(CPUState *regs, struct target_sigcontext *sc, |
| 2843 |
target_ulong *r0_p) |
| 2844 |
{
|
| 2845 |
unsigned int err = 0; |
| 2846 |
int i;
|
| 2847 |
|
| 2848 |
#define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) |
| 2849 |
COPY(gregs[1]);
|
| 2850 |
COPY(gregs[2]); COPY(gregs[3]); |
| 2851 |
COPY(gregs[4]); COPY(gregs[5]); |
| 2852 |
COPY(gregs[6]); COPY(gregs[7]); |
| 2853 |
COPY(gregs[8]); COPY(gregs[9]); |
| 2854 |
COPY(gregs[10]); COPY(gregs[11]); |
| 2855 |
COPY(gregs[12]); COPY(gregs[13]); |
| 2856 |
COPY(gregs[14]); COPY(gregs[15]); |
| 2857 |
COPY(gbr); COPY(mach); |
| 2858 |
COPY(macl); COPY(pr); |
| 2859 |
COPY(sr); COPY(pc); |
| 2860 |
#undef COPY
|
| 2861 |
|
| 2862 |
for (i=0; i<16; i++) { |
| 2863 |
err |= __get_user(regs->fregs[i], &sc->sc_fpregs[i]); |
| 2864 |
} |
| 2865 |
err |= __get_user(regs->fpscr, &sc->sc_fpscr); |
| 2866 |
err |= __get_user(regs->fpul, &sc->sc_fpul); |
| 2867 |
|
| 2868 |
regs->tra = -1; /* disable syscall checks */ |
| 2869 |
err |= __get_user(*r0_p, &sc->sc_gregs[0]);
|
| 2870 |
return err;
|
| 2871 |
} |
| 2872 |
|
| 2873 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 2874 |
target_sigset_t *set, CPUState *regs) |
| 2875 |
{
|
| 2876 |
struct target_sigframe *frame;
|
| 2877 |
abi_ulong frame_addr; |
| 2878 |
int i;
|
| 2879 |
int err = 0; |
| 2880 |
int signal;
|
| 2881 |
|
| 2882 |
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); |
| 2883 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 2884 |
goto give_sigsegv;
|
| 2885 |
|
| 2886 |
signal = current_exec_domain_sig(sig); |
| 2887 |
|
| 2888 |
err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
| 2889 |
|
| 2890 |
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { |
| 2891 |
err |= __put_user(set->sig[i + 1], &frame->extramask[i]);
|
| 2892 |
} |
| 2893 |
|
| 2894 |
/* Set up to return from userspace. If provided, use a stub
|
| 2895 |
already in userspace. */
|
| 2896 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
| 2897 |
regs->pr = (unsigned long) ka->sa_restorer; |
| 2898 |
} else {
|
| 2899 |
/* Generate return code (system call to sigreturn) */
|
| 2900 |
err |= __put_user(MOVW(2), &frame->retcode[0]); |
| 2901 |
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
|
| 2902 |
err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
|
| 2903 |
regs->pr = (unsigned long) frame->retcode; |
| 2904 |
} |
| 2905 |
|
| 2906 |
if (err)
|
| 2907 |
goto give_sigsegv;
|
| 2908 |
|
| 2909 |
/* Set up registers for signal handler */
|
| 2910 |
regs->gregs[15] = (unsigned long) frame; |
| 2911 |
regs->gregs[4] = signal; /* Arg for signal handler */ |
| 2912 |
regs->gregs[5] = 0; |
| 2913 |
regs->gregs[6] = (unsigned long) &frame->sc; |
| 2914 |
regs->pc = (unsigned long) ka->_sa_handler; |
| 2915 |
|
| 2916 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2917 |
return;
|
| 2918 |
|
| 2919 |
give_sigsegv:
|
| 2920 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2921 |
force_sig(TARGET_SIGSEGV); |
| 2922 |
} |
| 2923 |
|
| 2924 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 2925 |
target_siginfo_t *info, |
| 2926 |
target_sigset_t *set, CPUState *regs) |
| 2927 |
{
|
| 2928 |
struct target_rt_sigframe *frame;
|
| 2929 |
abi_ulong frame_addr; |
| 2930 |
int i;
|
| 2931 |
int err = 0; |
| 2932 |
int signal;
|
| 2933 |
|
| 2934 |
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); |
| 2935 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 2936 |
goto give_sigsegv;
|
| 2937 |
|
| 2938 |
signal = current_exec_domain_sig(sig); |
| 2939 |
|
| 2940 |
err |= copy_siginfo_to_user(&frame->info, info); |
| 2941 |
|
| 2942 |
/* Create the ucontext. */
|
| 2943 |
err |= __put_user(0, &frame->uc.tuc_flags);
|
| 2944 |
err |= __put_user(0, (unsigned long *)&frame->uc.tuc_link); |
| 2945 |
err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp, |
| 2946 |
&frame->uc.tuc_stack.ss_sp); |
| 2947 |
err |= __put_user(sas_ss_flags(regs->gregs[15]),
|
| 2948 |
&frame->uc.tuc_stack.ss_flags); |
| 2949 |
err |= __put_user(target_sigaltstack_used.ss_size, |
| 2950 |
&frame->uc.tuc_stack.ss_size); |
| 2951 |
err |= setup_sigcontext(&frame->uc.tuc_mcontext, |
| 2952 |
regs, set->sig[0]);
|
| 2953 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 2954 |
err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); |
| 2955 |
} |
| 2956 |
|
| 2957 |
/* Set up to return from userspace. If provided, use a stub
|
| 2958 |
already in userspace. */
|
| 2959 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
| 2960 |
regs->pr = (unsigned long) ka->sa_restorer; |
| 2961 |
} else {
|
| 2962 |
/* Generate return code (system call to sigreturn) */
|
| 2963 |
err |= __put_user(MOVW(2), &frame->retcode[0]); |
| 2964 |
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
|
| 2965 |
err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
|
| 2966 |
regs->pr = (unsigned long) frame->retcode; |
| 2967 |
} |
| 2968 |
|
| 2969 |
if (err)
|
| 2970 |
goto give_sigsegv;
|
| 2971 |
|
| 2972 |
/* Set up registers for signal handler */
|
| 2973 |
regs->gregs[15] = (unsigned long) frame; |
| 2974 |
regs->gregs[4] = signal; /* Arg for signal handler */ |
| 2975 |
regs->gregs[5] = (unsigned long) &frame->info; |
| 2976 |
regs->gregs[6] = (unsigned long) &frame->uc; |
| 2977 |
regs->pc = (unsigned long) ka->_sa_handler; |
| 2978 |
|
| 2979 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2980 |
return;
|
| 2981 |
|
| 2982 |
give_sigsegv:
|
| 2983 |
unlock_user_struct(frame, frame_addr, 1);
|
| 2984 |
force_sig(TARGET_SIGSEGV); |
| 2985 |
} |
| 2986 |
|
| 2987 |
long do_sigreturn(CPUState *regs)
|
| 2988 |
{
|
| 2989 |
struct target_sigframe *frame;
|
| 2990 |
abi_ulong frame_addr; |
| 2991 |
sigset_t blocked; |
| 2992 |
target_sigset_t target_set; |
| 2993 |
target_ulong r0; |
| 2994 |
int i;
|
| 2995 |
int err = 0; |
| 2996 |
|
| 2997 |
#if defined(DEBUG_SIGNAL)
|
| 2998 |
fprintf(stderr, "do_sigreturn\n");
|
| 2999 |
#endif
|
| 3000 |
frame_addr = regs->gregs[15];
|
| 3001 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 3002 |
goto badframe;
|
| 3003 |
|
| 3004 |
err |= __get_user(target_set.sig[0], &frame->sc.oldmask);
|
| 3005 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 3006 |
err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1]));
|
| 3007 |
} |
| 3008 |
|
| 3009 |
if (err)
|
| 3010 |
goto badframe;
|
| 3011 |
|
| 3012 |
target_to_host_sigset_internal(&blocked, &target_set); |
| 3013 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
| 3014 |
|
| 3015 |
if (restore_sigcontext(regs, &frame->sc, &r0))
|
| 3016 |
goto badframe;
|
| 3017 |
|
| 3018 |
unlock_user_struct(frame, frame_addr, 0);
|
| 3019 |
return r0;
|
| 3020 |
|
| 3021 |
badframe:
|
| 3022 |
unlock_user_struct(frame, frame_addr, 0);
|
| 3023 |
force_sig(TARGET_SIGSEGV); |
| 3024 |
return 0; |
| 3025 |
} |
| 3026 |
|
| 3027 |
long do_rt_sigreturn(CPUState *regs)
|
| 3028 |
{
|
| 3029 |
struct target_rt_sigframe *frame;
|
| 3030 |
abi_ulong frame_addr; |
| 3031 |
sigset_t blocked; |
| 3032 |
target_ulong r0; |
| 3033 |
|
| 3034 |
#if defined(DEBUG_SIGNAL)
|
| 3035 |
fprintf(stderr, "do_rt_sigreturn\n");
|
| 3036 |
#endif
|
| 3037 |
frame_addr = regs->gregs[15];
|
| 3038 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 3039 |
goto badframe;
|
| 3040 |
|
| 3041 |
target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask); |
| 3042 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
| 3043 |
|
| 3044 |
if (restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0))
|
| 3045 |
goto badframe;
|
| 3046 |
|
| 3047 |
if (do_sigaltstack(frame_addr +
|
| 3048 |
offsetof(struct target_rt_sigframe, uc.tuc_stack),
|
| 3049 |
0, get_sp_from_cpustate(regs)) == -EFAULT)
|
| 3050 |
goto badframe;
|
| 3051 |
|
| 3052 |
unlock_user_struct(frame, frame_addr, 0);
|
| 3053 |
return r0;
|
| 3054 |
|
| 3055 |
badframe:
|
| 3056 |
unlock_user_struct(frame, frame_addr, 0);
|
| 3057 |
force_sig(TARGET_SIGSEGV); |
| 3058 |
return 0; |
| 3059 |
} |
| 3060 |
#elif defined(TARGET_MICROBLAZE)
|
| 3061 |
|
| 3062 |
struct target_sigcontext {
|
| 3063 |
struct target_pt_regs regs; /* needs to be first */ |
| 3064 |
uint32_t oldmask; |
| 3065 |
}; |
| 3066 |
|
| 3067 |
struct target_stack_t {
|
| 3068 |
abi_ulong ss_sp; |
| 3069 |
int ss_flags;
|
| 3070 |
unsigned int ss_size; |
| 3071 |
}; |
| 3072 |
|
| 3073 |
struct target_ucontext {
|
| 3074 |
abi_ulong uc_flags; |
| 3075 |
abi_ulong uc_link; |
| 3076 |
struct target_stack_t uc_stack;
|
| 3077 |
struct target_sigcontext sc;
|
| 3078 |
uint32_t extramask[TARGET_NSIG_WORDS - 1];
|
| 3079 |
}; |
| 3080 |
|
| 3081 |
/* Signal frames. */
|
| 3082 |
struct target_signal_frame {
|
| 3083 |
struct target_ucontext uc;
|
| 3084 |
uint32_t extramask[TARGET_NSIG_WORDS - 1];
|
| 3085 |
uint32_t tramp[2];
|
| 3086 |
}; |
| 3087 |
|
| 3088 |
struct rt_signal_frame {
|
| 3089 |
struct siginfo info;
|
| 3090 |
struct ucontext uc;
|
| 3091 |
uint32_t tramp[2];
|
| 3092 |
}; |
| 3093 |
|
| 3094 |
static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) |
| 3095 |
{
|
| 3096 |
__put_user(env->regs[0], &sc->regs.r0);
|
| 3097 |
__put_user(env->regs[1], &sc->regs.r1);
|
| 3098 |
__put_user(env->regs[2], &sc->regs.r2);
|
| 3099 |
__put_user(env->regs[3], &sc->regs.r3);
|
| 3100 |
__put_user(env->regs[4], &sc->regs.r4);
|
| 3101 |
__put_user(env->regs[5], &sc->regs.r5);
|
| 3102 |
__put_user(env->regs[6], &sc->regs.r6);
|
| 3103 |
__put_user(env->regs[7], &sc->regs.r7);
|
| 3104 |
__put_user(env->regs[8], &sc->regs.r8);
|
| 3105 |
__put_user(env->regs[9], &sc->regs.r9);
|
| 3106 |
__put_user(env->regs[10], &sc->regs.r10);
|
| 3107 |
__put_user(env->regs[11], &sc->regs.r11);
|
| 3108 |
__put_user(env->regs[12], &sc->regs.r12);
|
| 3109 |
__put_user(env->regs[13], &sc->regs.r13);
|
| 3110 |
__put_user(env->regs[14], &sc->regs.r14);
|
| 3111 |
__put_user(env->regs[15], &sc->regs.r15);
|
| 3112 |
__put_user(env->regs[16], &sc->regs.r16);
|
| 3113 |
__put_user(env->regs[17], &sc->regs.r17);
|
| 3114 |
__put_user(env->regs[18], &sc->regs.r18);
|
| 3115 |
__put_user(env->regs[19], &sc->regs.r19);
|
| 3116 |
__put_user(env->regs[20], &sc->regs.r20);
|
| 3117 |
__put_user(env->regs[21], &sc->regs.r21);
|
| 3118 |
__put_user(env->regs[22], &sc->regs.r22);
|
| 3119 |
__put_user(env->regs[23], &sc->regs.r23);
|
| 3120 |
__put_user(env->regs[24], &sc->regs.r24);
|
| 3121 |
__put_user(env->regs[25], &sc->regs.r25);
|
| 3122 |
__put_user(env->regs[26], &sc->regs.r26);
|
| 3123 |
__put_user(env->regs[27], &sc->regs.r27);
|
| 3124 |
__put_user(env->regs[28], &sc->regs.r28);
|
| 3125 |
__put_user(env->regs[29], &sc->regs.r29);
|
| 3126 |
__put_user(env->regs[30], &sc->regs.r30);
|
| 3127 |
__put_user(env->regs[31], &sc->regs.r31);
|
| 3128 |
__put_user(env->sregs[SR_PC], &sc->regs.pc); |
| 3129 |
} |
| 3130 |
|
| 3131 |
static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) |
| 3132 |
{
|
| 3133 |
__get_user(env->regs[0], &sc->regs.r0);
|
| 3134 |
__get_user(env->regs[1], &sc->regs.r1);
|
| 3135 |
__get_user(env->regs[2], &sc->regs.r2);
|
| 3136 |
__get_user(env->regs[3], &sc->regs.r3);
|
| 3137 |
__get_user(env->regs[4], &sc->regs.r4);
|
| 3138 |
__get_user(env->regs[5], &sc->regs.r5);
|
| 3139 |
__get_user(env->regs[6], &sc->regs.r6);
|
| 3140 |
__get_user(env->regs[7], &sc->regs.r7);
|
| 3141 |
__get_user(env->regs[8], &sc->regs.r8);
|
| 3142 |
__get_user(env->regs[9], &sc->regs.r9);
|
| 3143 |
__get_user(env->regs[10], &sc->regs.r10);
|
| 3144 |
__get_user(env->regs[11], &sc->regs.r11);
|
| 3145 |
__get_user(env->regs[12], &sc->regs.r12);
|
| 3146 |
__get_user(env->regs[13], &sc->regs.r13);
|
| 3147 |
__get_user(env->regs[14], &sc->regs.r14);
|
| 3148 |
__get_user(env->regs[15], &sc->regs.r15);
|
| 3149 |
__get_user(env->regs[16], &sc->regs.r16);
|
| 3150 |
__get_user(env->regs[17], &sc->regs.r17);
|
| 3151 |
__get_user(env->regs[18], &sc->regs.r18);
|
| 3152 |
__get_user(env->regs[19], &sc->regs.r19);
|
| 3153 |
__get_user(env->regs[20], &sc->regs.r20);
|
| 3154 |
__get_user(env->regs[21], &sc->regs.r21);
|
| 3155 |
__get_user(env->regs[22], &sc->regs.r22);
|
| 3156 |
__get_user(env->regs[23], &sc->regs.r23);
|
| 3157 |
__get_user(env->regs[24], &sc->regs.r24);
|
| 3158 |
__get_user(env->regs[25], &sc->regs.r25);
|
| 3159 |
__get_user(env->regs[26], &sc->regs.r26);
|
| 3160 |
__get_user(env->regs[27], &sc->regs.r27);
|
| 3161 |
__get_user(env->regs[28], &sc->regs.r28);
|
| 3162 |
__get_user(env->regs[29], &sc->regs.r29);
|
| 3163 |
__get_user(env->regs[30], &sc->regs.r30);
|
| 3164 |
__get_user(env->regs[31], &sc->regs.r31);
|
| 3165 |
__get_user(env->sregs[SR_PC], &sc->regs.pc); |
| 3166 |
} |
| 3167 |
|
| 3168 |
static abi_ulong get_sigframe(struct target_sigaction *ka, |
| 3169 |
CPUState *env, int frame_size)
|
| 3170 |
{
|
| 3171 |
abi_ulong sp = env->regs[1];
|
| 3172 |
|
| 3173 |
if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp)) |
| 3174 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 3175 |
|
| 3176 |
return ((sp - frame_size) & -8UL); |
| 3177 |
} |
| 3178 |
|
| 3179 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 3180 |
target_sigset_t *set, CPUState *env) |
| 3181 |
{
|
| 3182 |
struct target_signal_frame *frame;
|
| 3183 |
abi_ulong frame_addr; |
| 3184 |
int err = 0; |
| 3185 |
int i;
|
| 3186 |
|
| 3187 |
frame_addr = get_sigframe(ka, env, sizeof *frame);
|
| 3188 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 3189 |
goto badframe;
|
| 3190 |
|
| 3191 |
/* Save the mask. */
|
| 3192 |
err |= __put_user(set->sig[0], &frame->uc.sc.oldmask);
|
| 3193 |
if (err)
|
| 3194 |
goto badframe;
|
| 3195 |
|
| 3196 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 3197 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
| 3198 |
goto badframe;
|
| 3199 |
} |
| 3200 |
|
| 3201 |
setup_sigcontext(&frame->uc.sc, env); |
| 3202 |
|
| 3203 |
/* Set up to return from userspace. If provided, use a stub
|
| 3204 |
already in userspace. */
|
| 3205 |
/* minus 8 is offset to cater for "rtsd r15,8" offset */
|
| 3206 |
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
| 3207 |
env->regs[15] = ((unsigned long)ka->sa_restorer)-8; |
| 3208 |
} else {
|
| 3209 |
uint32_t t; |
| 3210 |
/* Note, these encodings are _big endian_! */
|
| 3211 |
/* addi r12, r0, __NR_sigreturn */
|
| 3212 |
t = 0x31800000UL | TARGET_NR_sigreturn;
|
| 3213 |
err |= __put_user(t, frame->tramp + 0);
|
| 3214 |
/* brki r14, 0x8 */
|
| 3215 |
t = 0xb9cc0008UL;
|
| 3216 |
err |= __put_user(t, frame->tramp + 1);
|
| 3217 |
|
| 3218 |
/* Return from sighandler will jump to the tramp.
|
| 3219 |
Negative 8 offset because return is rtsd r15, 8 */
|
| 3220 |
env->regs[15] = ((unsigned long)frame->tramp) - 8; |
| 3221 |
} |
| 3222 |
|
| 3223 |
if (err)
|
| 3224 |
goto badframe;
|
| 3225 |
|
| 3226 |
/* Set up registers for signal handler */
|
| 3227 |
env->regs[1] = (unsigned long) frame; |
| 3228 |
/* Signal handler args: */
|
| 3229 |
env->regs[5] = sig; /* Arg 0: signum */ |
| 3230 |
env->regs[6] = 0; |
| 3231 |
env->regs[7] = (unsigned long) &frame->uc; /* arg 1: sigcontext */ |
| 3232 |
|
| 3233 |
/* Offset of 4 to handle microblaze rtid r14, 0 */
|
| 3234 |
env->sregs[SR_PC] = (unsigned long)ka->_sa_handler; |
| 3235 |
|
| 3236 |
unlock_user_struct(frame, frame_addr, 1);
|
| 3237 |
return;
|
| 3238 |
badframe:
|
| 3239 |
unlock_user_struct(frame, frame_addr, 1);
|
| 3240 |
force_sig(TARGET_SIGSEGV); |
| 3241 |
} |
| 3242 |
|
| 3243 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 3244 |
target_siginfo_t *info, |
| 3245 |
target_sigset_t *set, CPUState *env) |
| 3246 |
{
|
| 3247 |
fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n");
|
| 3248 |
} |
| 3249 |
|
| 3250 |
long do_sigreturn(CPUState *env)
|
| 3251 |
{
|
| 3252 |
struct target_signal_frame *frame;
|
| 3253 |
abi_ulong frame_addr; |
| 3254 |
target_sigset_t target_set; |
| 3255 |
sigset_t set; |
| 3256 |
int i;
|
| 3257 |
|
| 3258 |
frame_addr = env->regs[R_SP]; |
| 3259 |
/* Make sure the guest isn't playing games. */
|
| 3260 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) |
| 3261 |
goto badframe;
|
| 3262 |
|
| 3263 |
/* Restore blocked signals */
|
| 3264 |
if (__get_user(target_set.sig[0], &frame->uc.sc.oldmask)) |
| 3265 |
goto badframe;
|
| 3266 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 3267 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
| 3268 |
goto badframe;
|
| 3269 |
} |
| 3270 |
target_to_host_sigset_internal(&set, &target_set); |
| 3271 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 3272 |
|
| 3273 |
restore_sigcontext(&frame->uc.sc, env); |
| 3274 |
/* We got here through a sigreturn syscall, our path back is via an
|
| 3275 |
rtb insn so setup r14 for that. */
|
| 3276 |
env->regs[14] = env->sregs[SR_PC];
|
| 3277 |
|
| 3278 |
unlock_user_struct(frame, frame_addr, 0);
|
| 3279 |
return env->regs[10]; |
| 3280 |
badframe:
|
| 3281 |
unlock_user_struct(frame, frame_addr, 0);
|
| 3282 |
force_sig(TARGET_SIGSEGV); |
| 3283 |
} |
| 3284 |
|
| 3285 |
long do_rt_sigreturn(CPUState *env)
|
| 3286 |
{
|
| 3287 |
fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n");
|
| 3288 |
return -TARGET_ENOSYS;
|
| 3289 |
} |
| 3290 |
|
| 3291 |
#elif defined(TARGET_CRIS)
|
| 3292 |
|
| 3293 |
struct target_sigcontext {
|
| 3294 |
struct target_pt_regs regs; /* needs to be first */ |
| 3295 |
uint32_t oldmask; |
| 3296 |
uint32_t usp; /* usp before stacking this gunk on it */
|
| 3297 |
}; |
| 3298 |
|
| 3299 |
/* Signal frames. */
|
| 3300 |
struct target_signal_frame {
|
| 3301 |
struct target_sigcontext sc;
|
| 3302 |
uint32_t extramask[TARGET_NSIG_WORDS - 1];
|
| 3303 |
uint8_t retcode[8]; /* Trampoline code. */ |
| 3304 |
}; |
| 3305 |
|
| 3306 |
struct rt_signal_frame {
|
| 3307 |
struct siginfo *pinfo;
|
| 3308 |
void *puc;
|
| 3309 |
struct siginfo info;
|
| 3310 |
struct ucontext uc;
|
| 3311 |
uint8_t retcode[8]; /* Trampoline code. */ |
| 3312 |
}; |
| 3313 |
|
| 3314 |
static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) |
| 3315 |
{
|
| 3316 |
__put_user(env->regs[0], &sc->regs.r0);
|
| 3317 |
__put_user(env->regs[1], &sc->regs.r1);
|
| 3318 |
__put_user(env->regs[2], &sc->regs.r2);
|
| 3319 |
__put_user(env->regs[3], &sc->regs.r3);
|
| 3320 |
__put_user(env->regs[4], &sc->regs.r4);
|
| 3321 |
__put_user(env->regs[5], &sc->regs.r5);
|
| 3322 |
__put_user(env->regs[6], &sc->regs.r6);
|
| 3323 |
__put_user(env->regs[7], &sc->regs.r7);
|
| 3324 |
__put_user(env->regs[8], &sc->regs.r8);
|
| 3325 |
__put_user(env->regs[9], &sc->regs.r9);
|
| 3326 |
__put_user(env->regs[10], &sc->regs.r10);
|
| 3327 |
__put_user(env->regs[11], &sc->regs.r11);
|
| 3328 |
__put_user(env->regs[12], &sc->regs.r12);
|
| 3329 |
__put_user(env->regs[13], &sc->regs.r13);
|
| 3330 |
__put_user(env->regs[14], &sc->usp);
|
| 3331 |
__put_user(env->regs[15], &sc->regs.acr);
|
| 3332 |
__put_user(env->pregs[PR_MOF], &sc->regs.mof); |
| 3333 |
__put_user(env->pregs[PR_SRP], &sc->regs.srp); |
| 3334 |
__put_user(env->pc, &sc->regs.erp); |
| 3335 |
} |
| 3336 |
|
| 3337 |
static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) |
| 3338 |
{
|
| 3339 |
__get_user(env->regs[0], &sc->regs.r0);
|
| 3340 |
__get_user(env->regs[1], &sc->regs.r1);
|
| 3341 |
__get_user(env->regs[2], &sc->regs.r2);
|
| 3342 |
__get_user(env->regs[3], &sc->regs.r3);
|
| 3343 |
__get_user(env->regs[4], &sc->regs.r4);
|
| 3344 |
__get_user(env->regs[5], &sc->regs.r5);
|
| 3345 |
__get_user(env->regs[6], &sc->regs.r6);
|
| 3346 |
__get_user(env->regs[7], &sc->regs.r7);
|
| 3347 |
__get_user(env->regs[8], &sc->regs.r8);
|
| 3348 |
__get_user(env->regs[9], &sc->regs.r9);
|
| 3349 |
__get_user(env->regs[10], &sc->regs.r10);
|
| 3350 |
__get_user(env->regs[11], &sc->regs.r11);
|
| 3351 |
__get_user(env->regs[12], &sc->regs.r12);
|
| 3352 |
__get_user(env->regs[13], &sc->regs.r13);
|
| 3353 |
__get_user(env->regs[14], &sc->usp);
|
| 3354 |
__get_user(env->regs[15], &sc->regs.acr);
|
| 3355 |
__get_user(env->pregs[PR_MOF], &sc->regs.mof); |
| 3356 |
__get_user(env->pregs[PR_SRP], &sc->regs.srp); |
| 3357 |
__get_user(env->pc, &sc->regs.erp); |
| 3358 |
} |
| 3359 |
|
| 3360 |
static abi_ulong get_sigframe(CPUState *env, int framesize) |
| 3361 |
{
|
| 3362 |
abi_ulong sp; |
| 3363 |
/* Align the stack downwards to 4. */
|
| 3364 |
sp = (env->regs[R_SP] & ~3);
|
| 3365 |
return sp - framesize;
|
| 3366 |
} |
| 3367 |
|
| 3368 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 3369 |
target_sigset_t *set, CPUState *env) |
| 3370 |
{
|
| 3371 |
struct target_signal_frame *frame;
|
| 3372 |
abi_ulong frame_addr; |
| 3373 |
int err = 0; |
| 3374 |
int i;
|
| 3375 |
|
| 3376 |
frame_addr = get_sigframe(env, sizeof *frame);
|
| 3377 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 3378 |
goto badframe;
|
| 3379 |
|
| 3380 |
/*
|
| 3381 |
* The CRIS signal return trampoline. A real linux/CRIS kernel doesn't
|
| 3382 |
* use this trampoline anymore but it sets it up for GDB.
|
| 3383 |
* In QEMU, using the trampoline simplifies things a bit so we use it.
|
| 3384 |
*
|
| 3385 |
* This is movu.w __NR_sigreturn, r9; break 13;
|
| 3386 |
*/
|
| 3387 |
err |= __put_user(0x9c5f, frame->retcode+0); |
| 3388 |
err |= __put_user(TARGET_NR_sigreturn, |
| 3389 |
frame->retcode+2);
|
| 3390 |
err |= __put_user(0xe93d, frame->retcode+4); |
| 3391 |
|
| 3392 |
/* Save the mask. */
|
| 3393 |
err |= __put_user(set->sig[0], &frame->sc.oldmask);
|
| 3394 |
if (err)
|
| 3395 |
goto badframe;
|
| 3396 |
|
| 3397 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 3398 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
| 3399 |
goto badframe;
|
| 3400 |
} |
| 3401 |
|
| 3402 |
setup_sigcontext(&frame->sc, env); |
| 3403 |
|
| 3404 |
/* Move the stack and setup the arguments for the handler. */
|
| 3405 |
env->regs[R_SP] = (uint32_t) (unsigned long) frame; |
| 3406 |
env->regs[10] = sig;
|
| 3407 |
env->pc = (unsigned long) ka->_sa_handler; |
| 3408 |
/* Link SRP so the guest returns through the trampoline. */
|
| 3409 |
env->pregs[PR_SRP] = (uint32_t) (unsigned long) &frame->retcode[0]; |
| 3410 |
|
| 3411 |
unlock_user_struct(frame, frame_addr, 1);
|
| 3412 |
return;
|
| 3413 |
badframe:
|
| 3414 |
unlock_user_struct(frame, frame_addr, 1);
|
| 3415 |
force_sig(TARGET_SIGSEGV); |
| 3416 |
} |
| 3417 |
|
| 3418 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 3419 |
target_siginfo_t *info, |
| 3420 |
target_sigset_t *set, CPUState *env) |
| 3421 |
{
|
| 3422 |
fprintf(stderr, "CRIS setup_rt_frame: not implemented\n");
|
| 3423 |
} |
| 3424 |
|
| 3425 |
long do_sigreturn(CPUState *env)
|
| 3426 |
{
|
| 3427 |
struct target_signal_frame *frame;
|
| 3428 |
abi_ulong frame_addr; |
| 3429 |
target_sigset_t target_set; |
| 3430 |
sigset_t set; |
| 3431 |
int i;
|
| 3432 |
|
| 3433 |
frame_addr = env->regs[R_SP]; |
| 3434 |
/* Make sure the guest isn't playing games. */
|
| 3435 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) |
| 3436 |
goto badframe;
|
| 3437 |
|
| 3438 |
/* Restore blocked signals */
|
| 3439 |
if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
| 3440 |
goto badframe;
|
| 3441 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 3442 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
| 3443 |
goto badframe;
|
| 3444 |
} |
| 3445 |
target_to_host_sigset_internal(&set, &target_set); |
| 3446 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 3447 |
|
| 3448 |
restore_sigcontext(&frame->sc, env); |
| 3449 |
unlock_user_struct(frame, frame_addr, 0);
|
| 3450 |
return env->regs[10]; |
| 3451 |
badframe:
|
| 3452 |
unlock_user_struct(frame, frame_addr, 0);
|
| 3453 |
force_sig(TARGET_SIGSEGV); |
| 3454 |
} |
| 3455 |
|
| 3456 |
long do_rt_sigreturn(CPUState *env)
|
| 3457 |
{
|
| 3458 |
fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n");
|
| 3459 |
return -TARGET_ENOSYS;
|
| 3460 |
} |
| 3461 |
|
| 3462 |
#elif defined(TARGET_PPC) && !defined(TARGET_PPC64)
|
| 3463 |
|
| 3464 |
/* FIXME: Many of the structures are defined for both PPC and PPC64, but
|
| 3465 |
the signal handling is different enough that we haven't implemented
|
| 3466 |
support for PPC64 yet. Hence the restriction above.
|
| 3467 |
|
| 3468 |
There are various #if'd blocks for code for TARGET_PPC64. These
|
| 3469 |
blocks should go away so that we can successfully run 32-bit and
|
| 3470 |
64-bit binaries on a QEMU configured for PPC64. */
|
| 3471 |
|
| 3472 |
/* Size of dummy stack frame allocated when calling signal handler.
|
| 3473 |
See arch/powerpc/include/asm/ptrace.h. */
|
| 3474 |
#if defined(TARGET_PPC64)
|
| 3475 |
#define SIGNAL_FRAMESIZE 128 |
| 3476 |
#else
|
| 3477 |
#define SIGNAL_FRAMESIZE 64 |
| 3478 |
#endif
|
| 3479 |
|
| 3480 |
/* See arch/powerpc/include/asm/sigcontext.h. */
|
| 3481 |
struct target_sigcontext {
|
| 3482 |
target_ulong _unused[4];
|
| 3483 |
int32_t signal; |
| 3484 |
#if defined(TARGET_PPC64)
|
| 3485 |
int32_t pad0; |
| 3486 |
#endif
|
| 3487 |
target_ulong handler; |
| 3488 |
target_ulong oldmask; |
| 3489 |
target_ulong regs; /* struct pt_regs __user * */
|
| 3490 |
/* TODO: PPC64 includes extra bits here. */
|
| 3491 |
}; |
| 3492 |
|
| 3493 |
/* Indices for target_mcontext.mc_gregs, below.
|
| 3494 |
See arch/powerpc/include/asm/ptrace.h for details. */
|
| 3495 |
enum {
|
| 3496 |
TARGET_PT_R0 = 0,
|
| 3497 |
TARGET_PT_R1 = 1,
|
| 3498 |
TARGET_PT_R2 = 2,
|
| 3499 |
TARGET_PT_R3 = 3,
|
| 3500 |
TARGET_PT_R4 = 4,
|
| 3501 |
TARGET_PT_R5 = 5,
|
| 3502 |
TARGET_PT_R6 = 6,
|
| 3503 |
TARGET_PT_R7 = 7,
|
| 3504 |
TARGET_PT_R8 = 8,
|
| 3505 |
TARGET_PT_R9 = 9,
|
| 3506 |
TARGET_PT_R10 = 10,
|
| 3507 |
TARGET_PT_R11 = 11,
|
| 3508 |
TARGET_PT_R12 = 12,
|
| 3509 |
TARGET_PT_R13 = 13,
|
| 3510 |
TARGET_PT_R14 = 14,
|
| 3511 |
TARGET_PT_R15 = 15,
|
| 3512 |
TARGET_PT_R16 = 16,
|
| 3513 |
TARGET_PT_R17 = 17,
|
| 3514 |
TARGET_PT_R18 = 18,
|
| 3515 |
TARGET_PT_R19 = 19,
|
| 3516 |
TARGET_PT_R20 = 20,
|
| 3517 |
TARGET_PT_R21 = 21,
|
| 3518 |
TARGET_PT_R22 = 22,
|
| 3519 |
TARGET_PT_R23 = 23,
|
| 3520 |
TARGET_PT_R24 = 24,
|
| 3521 |
TARGET_PT_R25 = 25,
|
| 3522 |
TARGET_PT_R26 = 26,
|
| 3523 |
TARGET_PT_R27 = 27,
|
| 3524 |
TARGET_PT_R28 = 28,
|
| 3525 |
TARGET_PT_R29 = 29,
|
| 3526 |
TARGET_PT_R30 = 30,
|
| 3527 |
TARGET_PT_R31 = 31,
|
| 3528 |
TARGET_PT_NIP = 32,
|
| 3529 |
TARGET_PT_MSR = 33,
|
| 3530 |
TARGET_PT_ORIG_R3 = 34,
|
| 3531 |
TARGET_PT_CTR = 35,
|
| 3532 |
TARGET_PT_LNK = 36,
|
| 3533 |
TARGET_PT_XER = 37,
|
| 3534 |
TARGET_PT_CCR = 38,
|
| 3535 |
/* Yes, there are two registers with #39. One is 64-bit only. */
|
| 3536 |
TARGET_PT_MQ = 39,
|
| 3537 |
TARGET_PT_SOFTE = 39,
|
| 3538 |
TARGET_PT_TRAP = 40,
|
| 3539 |
TARGET_PT_DAR = 41,
|
| 3540 |
TARGET_PT_DSISR = 42,
|
| 3541 |
TARGET_PT_RESULT = 43,
|
| 3542 |
TARGET_PT_REGS_COUNT = 44
|
| 3543 |
}; |
| 3544 |
|
| 3545 |
/* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC;
|
| 3546 |
on 64-bit PPC, sigcontext and mcontext are one and the same. */
|
| 3547 |
struct target_mcontext {
|
| 3548 |
target_ulong mc_gregs[48];
|
| 3549 |
/* Includes fpscr. */
|
| 3550 |
uint64_t mc_fregs[33];
|
| 3551 |
target_ulong mc_pad[2];
|
| 3552 |
/* We need to handle Altivec and SPE at the same time, which no
|
| 3553 |
kernel needs to do. Fortunately, the kernel defines this bit to
|
| 3554 |
be Altivec-register-large all the time, rather than trying to
|
| 3555 |
twiddle it based on the specific platform. */
|
| 3556 |
union {
|
| 3557 |
/* SPE vector registers. One extra for SPEFSCR. */
|
| 3558 |
uint32_t spe[33];
|
| 3559 |
/* Altivec vector registers. The packing of VSCR and VRSAVE
|
| 3560 |
varies depending on whether we're PPC64 or not: PPC64 splits
|
| 3561 |
them apart; PPC32 stuffs them together. */
|
| 3562 |
#if defined(TARGET_PPC64)
|
| 3563 |
#define QEMU_NVRREG 34 |
| 3564 |
#else
|
| 3565 |
#define QEMU_NVRREG 33 |
| 3566 |
#endif
|
| 3567 |
ppc_avr_t altivec[QEMU_NVRREG]; |
| 3568 |
#undef QEMU_NVRREG
|
| 3569 |
} mc_vregs __attribute__((__aligned__(16)));
|
| 3570 |
}; |
| 3571 |
|
| 3572 |
struct target_ucontext {
|
| 3573 |
target_ulong tuc_flags; |
| 3574 |
target_ulong tuc_link; /* struct ucontext __user * */
|
| 3575 |
struct target_sigaltstack tuc_stack;
|
| 3576 |
#if !defined(TARGET_PPC64)
|
| 3577 |
int32_t tuc_pad[7];
|
| 3578 |
target_ulong tuc_regs; /* struct mcontext __user *
|
| 3579 |
points to uc_mcontext field */
|
| 3580 |
#endif
|
| 3581 |
target_sigset_t tuc_sigmask; |
| 3582 |
#if defined(TARGET_PPC64)
|
| 3583 |
target_sigset_t unused[15]; /* Allow for uc_sigmask growth */ |
| 3584 |
struct target_sigcontext tuc_mcontext;
|
| 3585 |
#else
|
| 3586 |
int32_t tuc_maskext[30];
|
| 3587 |
int32_t tuc_pad2[3];
|
| 3588 |
struct target_mcontext tuc_mcontext;
|
| 3589 |
#endif
|
| 3590 |
}; |
| 3591 |
|
| 3592 |
/* See arch/powerpc/kernel/signal_32.c. */
|
| 3593 |
struct target_sigframe {
|
| 3594 |
struct target_sigcontext sctx;
|
| 3595 |
struct target_mcontext mctx;
|
| 3596 |
int32_t abigap[56];
|
| 3597 |
}; |
| 3598 |
|
| 3599 |
struct target_rt_sigframe {
|
| 3600 |
struct target_siginfo info;
|
| 3601 |
struct target_ucontext uc;
|
| 3602 |
int32_t abigap[56];
|
| 3603 |
}; |
| 3604 |
|
| 3605 |
/* We use the mc_pad field for the signal return trampoline. */
|
| 3606 |
#define tramp mc_pad
|
| 3607 |
|
| 3608 |
/* See arch/powerpc/kernel/signal.c. */
|
| 3609 |
static target_ulong get_sigframe(struct target_sigaction *ka, |
| 3610 |
CPUState *env, |
| 3611 |
int frame_size)
|
| 3612 |
{
|
| 3613 |
target_ulong oldsp, newsp; |
| 3614 |
|
| 3615 |
oldsp = env->gpr[1];
|
| 3616 |
|
| 3617 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) &&
|
| 3618 |
(sas_ss_flags(oldsp))) {
|
| 3619 |
oldsp = (target_sigaltstack_used.ss_sp |
| 3620 |
+ target_sigaltstack_used.ss_size); |
| 3621 |
} |
| 3622 |
|
| 3623 |
newsp = (oldsp - frame_size) & ~0xFUL;
|
| 3624 |
|
| 3625 |
return newsp;
|
| 3626 |
} |
| 3627 |
|
| 3628 |
static int save_user_regs(CPUState *env, struct target_mcontext *frame, |
| 3629 |
int sigret)
|
| 3630 |
{
|
| 3631 |
target_ulong msr = env->msr; |
| 3632 |
int i;
|
| 3633 |
target_ulong ccr = 0;
|
| 3634 |
|
| 3635 |
/* In general, the kernel attempts to be intelligent about what it
|
| 3636 |
needs to save for Altivec/FP/SPE registers. We don't care that
|
| 3637 |
much, so we just go ahead and save everything. */
|
| 3638 |
|
| 3639 |
/* Save general registers. */
|
| 3640 |
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { |
| 3641 |
if (__put_user(env->gpr[i], &frame->mc_gregs[i])) {
|
| 3642 |
return 1; |
| 3643 |
} |
| 3644 |
} |
| 3645 |
if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
|
| 3646 |
|| __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]) |
| 3647 |
|| __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]) |
| 3648 |
|| __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER])) |
| 3649 |
return 1; |
| 3650 |
|
| 3651 |
for (i = 0; i < ARRAY_SIZE(env->crf); i++) { |
| 3652 |
ccr |= env->crf[i] << (32 - ((i + 1) * 4)); |
| 3653 |
} |
| 3654 |
if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
|
| 3655 |
return 1; |
| 3656 |
|
| 3657 |
/* Save Altivec registers if necessary. */
|
| 3658 |
if (env->insns_flags & PPC_ALTIVEC) {
|
| 3659 |
for (i = 0; i < ARRAY_SIZE(env->avr); i++) { |
| 3660 |
ppc_avr_t *avr = &env->avr[i]; |
| 3661 |
ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; |
| 3662 |
|
| 3663 |
if (__put_user(avr->u64[0], &vreg->u64[0]) || |
| 3664 |
__put_user(avr->u64[1], &vreg->u64[1])) { |
| 3665 |
return 1; |
| 3666 |
} |
| 3667 |
} |
| 3668 |
/* Set MSR_VR in the saved MSR value to indicate that
|
| 3669 |
frame->mc_vregs contains valid data. */
|
| 3670 |
msr |= MSR_VR; |
| 3671 |
if (__put_user((uint32_t)env->spr[SPR_VRSAVE],
|
| 3672 |
&frame->mc_vregs.altivec[32].u32[3])) |
| 3673 |
return 1; |
| 3674 |
} |
| 3675 |
|
| 3676 |
/* Save floating point registers. */
|
| 3677 |
if (env->insns_flags & PPC_FLOAT) {
|
| 3678 |
for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { |
| 3679 |
if (__put_user(env->fpr[i], &frame->mc_fregs[i])) {
|
| 3680 |
return 1; |
| 3681 |
} |
| 3682 |
} |
| 3683 |
if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32])) |
| 3684 |
return 1; |
| 3685 |
} |
| 3686 |
|
| 3687 |
/* Save SPE registers. The kernel only saves the high half. */
|
| 3688 |
if (env->insns_flags & PPC_SPE) {
|
| 3689 |
#if defined(TARGET_PPC64)
|
| 3690 |
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { |
| 3691 |
if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) { |
| 3692 |
return 1; |
| 3693 |
} |
| 3694 |
} |
| 3695 |
#else
|
| 3696 |
for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { |
| 3697 |
if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
|
| 3698 |
return 1; |
| 3699 |
} |
| 3700 |
} |
| 3701 |
#endif
|
| 3702 |
/* Set MSR_SPE in the saved MSR value to indicate that
|
| 3703 |
frame->mc_vregs contains valid data. */
|
| 3704 |
msr |= MSR_SPE; |
| 3705 |
if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32])) |
| 3706 |
return 1; |
| 3707 |
} |
| 3708 |
|
| 3709 |
/* Store MSR. */
|
| 3710 |
if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
|
| 3711 |
return 1; |
| 3712 |
|
| 3713 |
/* Set up the sigreturn trampoline: li r0,sigret; sc. */
|
| 3714 |
if (sigret) {
|
| 3715 |
if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) || |
| 3716 |
__put_user(0x44000002UL, &frame->tramp[1])) { |
| 3717 |
return 1; |
| 3718 |
} |
| 3719 |
} |
| 3720 |
|
| 3721 |
return 0; |
| 3722 |
} |
| 3723 |
|
| 3724 |
static int restore_user_regs(CPUState *env, |
| 3725 |
struct target_mcontext *frame, int sig) |
| 3726 |
{
|
| 3727 |
target_ulong save_r2 = 0;
|
| 3728 |
target_ulong msr; |
| 3729 |
target_ulong ccr; |
| 3730 |
|
| 3731 |
int i;
|
| 3732 |
|
| 3733 |
if (!sig) {
|
| 3734 |
save_r2 = env->gpr[2];
|
| 3735 |
} |
| 3736 |
|
| 3737 |
/* Restore general registers. */
|
| 3738 |
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { |
| 3739 |
if (__get_user(env->gpr[i], &frame->mc_gregs[i])) {
|
| 3740 |
return 1; |
| 3741 |
} |
| 3742 |
} |
| 3743 |
if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP])
|
| 3744 |
|| __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]) |
| 3745 |
|| __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]) |
| 3746 |
|| __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER])) |
| 3747 |
return 1; |
| 3748 |
if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]))
|
| 3749 |
return 1; |
| 3750 |
|
| 3751 |
for (i = 0; i < ARRAY_SIZE(env->crf); i++) { |
| 3752 |
env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf; |
| 3753 |
} |
| 3754 |
|
| 3755 |
if (!sig) {
|
| 3756 |
env->gpr[2] = save_r2;
|
| 3757 |
} |
| 3758 |
/* Restore MSR. */
|
| 3759 |
if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]))
|
| 3760 |
return 1; |
| 3761 |
|
| 3762 |
/* If doing signal return, restore the previous little-endian mode. */
|
| 3763 |
if (sig)
|
| 3764 |
env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE); |
| 3765 |
|
| 3766 |
/* Restore Altivec registers if necessary. */
|
| 3767 |
if (env->insns_flags & PPC_ALTIVEC) {
|
| 3768 |
for (i = 0; i < ARRAY_SIZE(env->avr); i++) { |
| 3769 |
ppc_avr_t *avr = &env->avr[i]; |
| 3770 |
ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; |
| 3771 |
|
| 3772 |
if (__get_user(avr->u64[0], &vreg->u64[0]) || |
| 3773 |
__get_user(avr->u64[1], &vreg->u64[1])) { |
| 3774 |
return 1; |
| 3775 |
} |
| 3776 |
} |
| 3777 |
/* Set MSR_VEC in the saved MSR value to indicate that
|
| 3778 |
frame->mc_vregs contains valid data. */
|
| 3779 |
if (__get_user(env->spr[SPR_VRSAVE],
|
| 3780 |
(target_ulong *)(&frame->mc_vregs.altivec[32].u32[3]))) |
| 3781 |
return 1; |
| 3782 |
} |
| 3783 |
|
| 3784 |
/* Restore floating point registers. */
|
| 3785 |
if (env->insns_flags & PPC_FLOAT) {
|
| 3786 |
uint64_t fpscr; |
| 3787 |
for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { |
| 3788 |
if (__get_user(env->fpr[i], &frame->mc_fregs[i])) {
|
| 3789 |
return 1; |
| 3790 |
} |
| 3791 |
} |
| 3792 |
if (__get_user(fpscr, &frame->mc_fregs[32])) |
| 3793 |
return 1; |
| 3794 |
env->fpscr = (uint32_t) fpscr; |
| 3795 |
} |
| 3796 |
|
| 3797 |
/* Save SPE registers. The kernel only saves the high half. */
|
| 3798 |
if (env->insns_flags & PPC_SPE) {
|
| 3799 |
#if defined(TARGET_PPC64)
|
| 3800 |
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { |
| 3801 |
uint32_t hi; |
| 3802 |
|
| 3803 |
if (__get_user(hi, &frame->mc_vregs.spe[i])) {
|
| 3804 |
return 1; |
| 3805 |
} |
| 3806 |
env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
|
| 3807 |
} |
| 3808 |
#else
|
| 3809 |
for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { |
| 3810 |
if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) {
|
| 3811 |
return 1; |
| 3812 |
} |
| 3813 |
} |
| 3814 |
#endif
|
| 3815 |
if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32])) |
| 3816 |
return 1; |
| 3817 |
} |
| 3818 |
|
| 3819 |
return 0; |
| 3820 |
} |
| 3821 |
|
| 3822 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 3823 |
target_sigset_t *set, CPUState *env) |
| 3824 |
{
|
| 3825 |
struct target_sigframe *frame;
|
| 3826 |
struct target_sigcontext *sc;
|
| 3827 |
target_ulong frame_addr, newsp; |
| 3828 |
int err = 0; |
| 3829 |
int signal;
|
| 3830 |
|
| 3831 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
| 3832 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) |
| 3833 |
goto sigsegv;
|
| 3834 |
sc = &frame->sctx; |
| 3835 |
|
| 3836 |
signal = current_exec_domain_sig(sig); |
| 3837 |
|
| 3838 |
err |= __put_user(h2g(ka->_sa_handler), &sc->handler); |
| 3839 |
err |= __put_user(set->sig[0], &sc->oldmask);
|
| 3840 |
#if defined(TARGET_PPC64)
|
| 3841 |
err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]); |
| 3842 |
#else
|
| 3843 |
err |= __put_user(set->sig[1], &sc->_unused[3]); |
| 3844 |
#endif
|
| 3845 |
err |= __put_user(h2g(&frame->mctx), &sc->regs); |
| 3846 |
err |= __put_user(sig, &sc->signal); |
| 3847 |
|
| 3848 |
/* Save user regs. */
|
| 3849 |
err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn); |
| 3850 |
|
| 3851 |
/* The kernel checks for the presence of a VDSO here. We don't
|
| 3852 |
emulate a vdso, so use a sigreturn system call. */
|
| 3853 |
env->lr = (target_ulong) h2g(frame->mctx.tramp); |
| 3854 |
|
| 3855 |
/* Turn off all fp exceptions. */
|
| 3856 |
env->fpscr = 0;
|
| 3857 |
|
| 3858 |
/* Create a stack frame for the caller of the handler. */
|
| 3859 |
newsp = frame_addr - SIGNAL_FRAMESIZE; |
| 3860 |
err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
|
| 3861 |
|
| 3862 |
if (err)
|
| 3863 |
goto sigsegv;
|
| 3864 |
|
| 3865 |
/* Set up registers for signal handler. */
|
| 3866 |
env->gpr[1] = newsp;
|
| 3867 |
env->gpr[3] = signal;
|
| 3868 |
env->gpr[4] = (target_ulong) h2g(sc);
|
| 3869 |
env->nip = (target_ulong) ka->_sa_handler; |
| 3870 |
/* Signal handlers are entered in big-endian mode. */
|
| 3871 |
env->msr &= ~MSR_LE; |
| 3872 |
|
| 3873 |
unlock_user_struct(frame, frame_addr, 1);
|
| 3874 |
return;
|
| 3875 |
|
| 3876 |
sigsegv:
|
| 3877 |
unlock_user_struct(frame, frame_addr, 1);
|
| 3878 |
if (logfile)
|
| 3879 |
fprintf (logfile, "segfaulting from setup_frame\n");
|
| 3880 |
force_sig(TARGET_SIGSEGV); |
| 3881 |
} |
| 3882 |
|
| 3883 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 3884 |
target_siginfo_t *info, |
| 3885 |
target_sigset_t *set, CPUState *env) |
| 3886 |
{
|
| 3887 |
struct target_rt_sigframe *rt_sf;
|
| 3888 |
struct target_mcontext *frame;
|
| 3889 |
target_ulong rt_sf_addr, newsp = 0;
|
| 3890 |
int i, err = 0; |
| 3891 |
int signal;
|
| 3892 |
|
| 3893 |
rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
|
| 3894 |
if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1)) |
| 3895 |
goto sigsegv;
|
| 3896 |
|
| 3897 |
signal = current_exec_domain_sig(sig); |
| 3898 |
|
| 3899 |
err |= copy_siginfo_to_user(&rt_sf->info, info); |
| 3900 |
|
| 3901 |
err |= __put_user(0, &rt_sf->uc.tuc_flags);
|
| 3902 |
err |= __put_user(0, &rt_sf->uc.tuc_link);
|
| 3903 |
err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp, |
| 3904 |
&rt_sf->uc.tuc_stack.ss_sp); |
| 3905 |
err |= __put_user(sas_ss_flags(env->gpr[1]),
|
| 3906 |
&rt_sf->uc.tuc_stack.ss_flags); |
| 3907 |
err |= __put_user(target_sigaltstack_used.ss_size, |
| 3908 |
&rt_sf->uc.tuc_stack.ss_size); |
| 3909 |
err |= __put_user(h2g (&rt_sf->uc.tuc_mcontext), |
| 3910 |
&rt_sf->uc.tuc_regs); |
| 3911 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 3912 |
err |= __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]); |
| 3913 |
} |
| 3914 |
|
| 3915 |
frame = &rt_sf->uc.tuc_mcontext; |
| 3916 |
err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn); |
| 3917 |
|
| 3918 |
/* The kernel checks for the presence of a VDSO here. We don't
|
| 3919 |
emulate a vdso, so use a sigreturn system call. */
|
| 3920 |
env->lr = (target_ulong) h2g(frame->tramp); |
| 3921 |
|
| 3922 |
/* Turn off all fp exceptions. */
|
| 3923 |
env->fpscr = 0;
|
| 3924 |
|
| 3925 |
/* Create a stack frame for the caller of the handler. */
|
| 3926 |
newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
|
| 3927 |
err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
|
| 3928 |
|
| 3929 |
if (err)
|
| 3930 |
goto sigsegv;
|
| 3931 |
|
| 3932 |
/* Set up registers for signal handler. */
|
| 3933 |
env->gpr[1] = newsp;
|
| 3934 |
env->gpr[3] = (target_ulong) signal;
|
| 3935 |
env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
|
| 3936 |
env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
|
| 3937 |
env->gpr[6] = (target_ulong) h2g(rt_sf);
|
| 3938 |
env->nip = (target_ulong) ka->_sa_handler; |
| 3939 |
/* Signal handlers are entered in big-endian mode. */
|
| 3940 |
env->msr &= ~MSR_LE; |
| 3941 |
|
| 3942 |
unlock_user_struct(rt_sf, rt_sf_addr, 1);
|
| 3943 |
return;
|
| 3944 |
|
| 3945 |
sigsegv:
|
| 3946 |
unlock_user_struct(rt_sf, rt_sf_addr, 1);
|
| 3947 |
if (logfile)
|
| 3948 |
fprintf (logfile, "segfaulting from setup_rt_frame\n");
|
| 3949 |
force_sig(TARGET_SIGSEGV); |
| 3950 |
|
| 3951 |
} |
| 3952 |
|
| 3953 |
long do_sigreturn(CPUState *env)
|
| 3954 |
{
|
| 3955 |
struct target_sigcontext *sc = NULL; |
| 3956 |
struct target_mcontext *sr = NULL; |
| 3957 |
target_ulong sr_addr, sc_addr; |
| 3958 |
sigset_t blocked; |
| 3959 |
target_sigset_t set; |
| 3960 |
|
| 3961 |
sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
|
| 3962 |
if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) |
| 3963 |
goto sigsegv;
|
| 3964 |
|
| 3965 |
#if defined(TARGET_PPC64)
|
| 3966 |
set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32); |
| 3967 |
#else
|
| 3968 |
if(__get_user(set.sig[0], &sc->oldmask) || |
| 3969 |
__get_user(set.sig[1], &sc->_unused[3])) |
| 3970 |
goto sigsegv;
|
| 3971 |
#endif
|
| 3972 |
target_to_host_sigset_internal(&blocked, &set); |
| 3973 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
| 3974 |
|
| 3975 |
if (__get_user(sr_addr, &sc->regs))
|
| 3976 |
goto sigsegv;
|
| 3977 |
if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1)) |
| 3978 |
goto sigsegv;
|
| 3979 |
if (restore_user_regs(env, sr, 1)) |
| 3980 |
goto sigsegv;
|
| 3981 |
|
| 3982 |
unlock_user_struct(sr, sr_addr, 1);
|
| 3983 |
unlock_user_struct(sc, sc_addr, 1);
|
| 3984 |
return -TARGET_QEMU_ESIGRETURN;
|
| 3985 |
|
| 3986 |
sigsegv:
|
| 3987 |
unlock_user_struct(sr, sr_addr, 1);
|
| 3988 |
unlock_user_struct(sc, sc_addr, 1);
|
| 3989 |
if (logfile)
|
| 3990 |
fprintf (logfile, "segfaulting from do_sigreturn\n");
|
| 3991 |
force_sig(TARGET_SIGSEGV); |
| 3992 |
return 0; |
| 3993 |
} |
| 3994 |
|
| 3995 |
/* See arch/powerpc/kernel/signal_32.c. */
|
| 3996 |
static int do_setcontext(struct target_ucontext *ucp, CPUState *env, int sig) |
| 3997 |
{
|
| 3998 |
struct target_mcontext *mcp;
|
| 3999 |
target_ulong mcp_addr; |
| 4000 |
sigset_t blocked; |
| 4001 |
target_sigset_t set; |
| 4002 |
|
| 4003 |
if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask), |
| 4004 |
sizeof (set)))
|
| 4005 |
return 1; |
| 4006 |
|
| 4007 |
#if defined(TARGET_PPC64)
|
| 4008 |
fprintf (stderr, "do_setcontext: not implemented\n");
|
| 4009 |
return 0; |
| 4010 |
#else
|
| 4011 |
if (__get_user(mcp_addr, &ucp->tuc_regs))
|
| 4012 |
return 1; |
| 4013 |
|
| 4014 |
if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1)) |
| 4015 |
return 1; |
| 4016 |
|
| 4017 |
target_to_host_sigset_internal(&blocked, &set); |
| 4018 |
sigprocmask(SIG_SETMASK, &blocked, NULL);
|
| 4019 |
if (restore_user_regs(env, mcp, sig))
|
| 4020 |
goto sigsegv;
|
| 4021 |
|
| 4022 |
unlock_user_struct(mcp, mcp_addr, 1);
|
| 4023 |
return 0; |
| 4024 |
|
| 4025 |
sigsegv:
|
| 4026 |
unlock_user_struct(mcp, mcp_addr, 1);
|
| 4027 |
return 1; |
| 4028 |
#endif
|
| 4029 |
} |
| 4030 |
|
| 4031 |
long do_rt_sigreturn(CPUState *env)
|
| 4032 |
{
|
| 4033 |
struct target_rt_sigframe *rt_sf = NULL; |
| 4034 |
target_ulong rt_sf_addr; |
| 4035 |
|
| 4036 |
rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16; |
| 4037 |
if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1)) |
| 4038 |
goto sigsegv;
|
| 4039 |
|
| 4040 |
if (do_setcontext(&rt_sf->uc, env, 1)) |
| 4041 |
goto sigsegv;
|
| 4042 |
|
| 4043 |
do_sigaltstack(rt_sf_addr |
| 4044 |
+ offsetof(struct target_rt_sigframe, uc.tuc_stack),
|
| 4045 |
0, env->gpr[1]); |
| 4046 |
|
| 4047 |
unlock_user_struct(rt_sf, rt_sf_addr, 1);
|
| 4048 |
return -TARGET_QEMU_ESIGRETURN;
|
| 4049 |
|
| 4050 |
sigsegv:
|
| 4051 |
unlock_user_struct(rt_sf, rt_sf_addr, 1);
|
| 4052 |
if (logfile)
|
| 4053 |
fprintf (logfile, "segfaulting from do_rt_sigreturn\n");
|
| 4054 |
force_sig(TARGET_SIGSEGV); |
| 4055 |
return 0; |
| 4056 |
} |
| 4057 |
|
| 4058 |
#elif defined(TARGET_M68K)
|
| 4059 |
|
| 4060 |
struct target_sigcontext {
|
| 4061 |
abi_ulong sc_mask; |
| 4062 |
abi_ulong sc_usp; |
| 4063 |
abi_ulong sc_d0; |
| 4064 |
abi_ulong sc_d1; |
| 4065 |
abi_ulong sc_a0; |
| 4066 |
abi_ulong sc_a1; |
| 4067 |
unsigned short sc_sr; |
| 4068 |
abi_ulong sc_pc; |
| 4069 |
}; |
| 4070 |
|
| 4071 |
struct target_sigframe
|
| 4072 |
{
|
| 4073 |
abi_ulong pretcode; |
| 4074 |
int sig;
|
| 4075 |
int code;
|
| 4076 |
abi_ulong psc; |
| 4077 |
char retcode[8]; |
| 4078 |
abi_ulong extramask[TARGET_NSIG_WORDS-1];
|
| 4079 |
struct target_sigcontext sc;
|
| 4080 |
}; |
| 4081 |
|
| 4082 |
typedef int target_greg_t; |
| 4083 |
#define TARGET_NGREG 18 |
| 4084 |
typedef target_greg_t target_gregset_t[TARGET_NGREG];
|
| 4085 |
|
| 4086 |
typedef struct target_fpregset { |
| 4087 |
int f_fpcntl[3]; |
| 4088 |
int f_fpregs[8*3]; |
| 4089 |
} target_fpregset_t; |
| 4090 |
|
| 4091 |
struct target_mcontext {
|
| 4092 |
int version;
|
| 4093 |
target_gregset_t gregs; |
| 4094 |
target_fpregset_t fpregs; |
| 4095 |
}; |
| 4096 |
|
| 4097 |
#define TARGET_MCONTEXT_VERSION 2 |
| 4098 |
|
| 4099 |
struct target_ucontext {
|
| 4100 |
abi_ulong tuc_flags; |
| 4101 |
abi_ulong tuc_link; |
| 4102 |
target_stack_t tuc_stack; |
| 4103 |
struct target_mcontext tuc_mcontext;
|
| 4104 |
abi_long tuc_filler[80];
|
| 4105 |
target_sigset_t tuc_sigmask; |
| 4106 |
}; |
| 4107 |
|
| 4108 |
struct target_rt_sigframe
|
| 4109 |
{
|
| 4110 |
abi_ulong pretcode; |
| 4111 |
int sig;
|
| 4112 |
abi_ulong pinfo; |
| 4113 |
abi_ulong puc; |
| 4114 |
char retcode[8]; |
| 4115 |
struct target_siginfo info;
|
| 4116 |
struct target_ucontext uc;
|
| 4117 |
}; |
| 4118 |
|
| 4119 |
static int |
| 4120 |
setup_sigcontext(struct target_sigcontext *sc, CPUState *env, abi_ulong mask)
|
| 4121 |
{
|
| 4122 |
int err = 0; |
| 4123 |
|
| 4124 |
err |= __put_user(mask, &sc->sc_mask); |
| 4125 |
err |= __put_user(env->aregs[7], &sc->sc_usp);
|
| 4126 |
err |= __put_user(env->dregs[0], &sc->sc_d0);
|
| 4127 |
err |= __put_user(env->dregs[1], &sc->sc_d1);
|
| 4128 |
err |= __put_user(env->aregs[0], &sc->sc_a0);
|
| 4129 |
err |= __put_user(env->aregs[1], &sc->sc_a1);
|
| 4130 |
err |= __put_user(env->sr, &sc->sc_sr); |
| 4131 |
err |= __put_user(env->pc, &sc->sc_pc); |
| 4132 |
|
| 4133 |
return err;
|
| 4134 |
} |
| 4135 |
|
| 4136 |
static int |
| 4137 |
restore_sigcontext(CPUState *env, struct target_sigcontext *sc, int *pd0) |
| 4138 |
{
|
| 4139 |
int err = 0; |
| 4140 |
int temp;
|
| 4141 |
|
| 4142 |
err |= __get_user(env->aregs[7], &sc->sc_usp);
|
| 4143 |
err |= __get_user(env->dregs[1], &sc->sc_d1);
|
| 4144 |
err |= __get_user(env->aregs[0], &sc->sc_a0);
|
| 4145 |
err |= __get_user(env->aregs[1], &sc->sc_a1);
|
| 4146 |
err |= __get_user(env->pc, &sc->sc_pc); |
| 4147 |
err |= __get_user(temp, &sc->sc_sr); |
| 4148 |
env->sr = (env->sr & 0xff00) | (temp & 0xff); |
| 4149 |
|
| 4150 |
*pd0 = tswapl(sc->sc_d0); |
| 4151 |
|
| 4152 |
return err;
|
| 4153 |
} |
| 4154 |
|
| 4155 |
/*
|
| 4156 |
* Determine which stack to use..
|
| 4157 |
*/
|
| 4158 |
static inline abi_ulong |
| 4159 |
get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size)
|
| 4160 |
{
|
| 4161 |
unsigned long sp; |
| 4162 |
|
| 4163 |
sp = regs->aregs[7];
|
| 4164 |
|
| 4165 |
/* This is the X/Open sanctioned signal stack switching. */
|
| 4166 |
if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { |
| 4167 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 4168 |
} |
| 4169 |
|
| 4170 |
return ((sp - frame_size) & -8UL); |
| 4171 |
} |
| 4172 |
|
| 4173 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 4174 |
target_sigset_t *set, CPUState *env) |
| 4175 |
{
|
| 4176 |
struct target_sigframe *frame;
|
| 4177 |
abi_ulong frame_addr; |
| 4178 |
abi_ulong retcode_addr; |
| 4179 |
abi_ulong sc_addr; |
| 4180 |
int err = 0; |
| 4181 |
int i;
|
| 4182 |
|
| 4183 |
frame_addr = get_sigframe(ka, env, sizeof *frame);
|
| 4184 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 4185 |
goto give_sigsegv;
|
| 4186 |
|
| 4187 |
err |= __put_user(sig, &frame->sig); |
| 4188 |
|
| 4189 |
sc_addr = frame_addr + offsetof(struct target_sigframe, sc);
|
| 4190 |
err |= __put_user(sc_addr, &frame->psc); |
| 4191 |
|
| 4192 |
err |= setup_sigcontext(&frame->sc, env, set->sig[0]);
|
| 4193 |
if (err)
|
| 4194 |
goto give_sigsegv;
|
| 4195 |
|
| 4196 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 4197 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
| 4198 |
goto give_sigsegv;
|
| 4199 |
} |
| 4200 |
|
| 4201 |
/* Set up to return from userspace. */
|
| 4202 |
|
| 4203 |
retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
|
| 4204 |
err |= __put_user(retcode_addr, &frame->pretcode); |
| 4205 |
|
| 4206 |
/* moveq #,d0; trap #0 */
|
| 4207 |
|
| 4208 |
err |= __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16), |
| 4209 |
(long *)(frame->retcode));
|
| 4210 |
|
| 4211 |
if (err)
|
| 4212 |
goto give_sigsegv;
|
| 4213 |
|
| 4214 |
/* Set up to return from userspace */
|
| 4215 |
|
| 4216 |
env->aregs[7] = frame_addr;
|
| 4217 |
env->pc = ka->_sa_handler; |
| 4218 |
|
| 4219 |
unlock_user_struct(frame, frame_addr, 1);
|
| 4220 |
return;
|
| 4221 |
|
| 4222 |
give_sigsegv:
|
| 4223 |
unlock_user_struct(frame, frame_addr, 1);
|
| 4224 |
force_sig(TARGET_SIGSEGV); |
| 4225 |
} |
| 4226 |
|
| 4227 |
static inline int target_rt_setup_ucontext(struct target_ucontext *uc, |
| 4228 |
CPUState *env) |
| 4229 |
{
|
| 4230 |
target_greg_t *gregs = uc->tuc_mcontext.gregs; |
| 4231 |
int err;
|
| 4232 |
|
| 4233 |
err = __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version); |
| 4234 |
err |= __put_user(env->dregs[0], &gregs[0]); |
| 4235 |
err |= __put_user(env->dregs[1], &gregs[1]); |
| 4236 |
err |= __put_user(env->dregs[2], &gregs[2]); |
| 4237 |
err |= __put_user(env->dregs[3], &gregs[3]); |
| 4238 |
err |= __put_user(env->dregs[4], &gregs[4]); |
| 4239 |
err |= __put_user(env->dregs[5], &gregs[5]); |
| 4240 |
err |= __put_user(env->dregs[6], &gregs[6]); |
| 4241 |
err |= __put_user(env->dregs[7], &gregs[7]); |
| 4242 |
err |= __put_user(env->aregs[0], &gregs[8]); |
| 4243 |
err |= __put_user(env->aregs[1], &gregs[9]); |
| 4244 |
err |= __put_user(env->aregs[2], &gregs[10]); |
| 4245 |
err |= __put_user(env->aregs[3], &gregs[11]); |
| 4246 |
err |= __put_user(env->aregs[4], &gregs[12]); |
| 4247 |
err |= __put_user(env->aregs[5], &gregs[13]); |
| 4248 |
err |= __put_user(env->aregs[6], &gregs[14]); |
| 4249 |
err |= __put_user(env->aregs[7], &gregs[15]); |
| 4250 |
err |= __put_user(env->pc, &gregs[16]);
|
| 4251 |
err |= __put_user(env->sr, &gregs[17]);
|
| 4252 |
|
| 4253 |
return err;
|
| 4254 |
} |
| 4255 |
|
| 4256 |
static inline int target_rt_restore_ucontext(CPUState *env, |
| 4257 |
struct target_ucontext *uc,
|
| 4258 |
int *pd0)
|
| 4259 |
{
|
| 4260 |
int temp;
|
| 4261 |
int err;
|
| 4262 |
target_greg_t *gregs = uc->tuc_mcontext.gregs; |
| 4263 |
|
| 4264 |
err = __get_user(temp, &uc->tuc_mcontext.version); |
| 4265 |
if (temp != TARGET_MCONTEXT_VERSION)
|
| 4266 |
goto badframe;
|
| 4267 |
|
| 4268 |
/* restore passed registers */
|
| 4269 |
err |= __get_user(env->dregs[0], &gregs[0]); |
| 4270 |
err |= __get_user(env->dregs[1], &gregs[1]); |
| 4271 |
err |= __get_user(env->dregs[2], &gregs[2]); |
| 4272 |
err |= __get_user(env->dregs[3], &gregs[3]); |
| 4273 |
err |= __get_user(env->dregs[4], &gregs[4]); |
| 4274 |
err |= __get_user(env->dregs[5], &gregs[5]); |
| 4275 |
err |= __get_user(env->dregs[6], &gregs[6]); |
| 4276 |
err |= __get_user(env->dregs[7], &gregs[7]); |
| 4277 |
err |= __get_user(env->aregs[0], &gregs[8]); |
| 4278 |
err |= __get_user(env->aregs[1], &gregs[9]); |
| 4279 |
err |= __get_user(env->aregs[2], &gregs[10]); |
| 4280 |
err |= __get_user(env->aregs[3], &gregs[11]); |
| 4281 |
err |= __get_user(env->aregs[4], &gregs[12]); |
| 4282 |
err |= __get_user(env->aregs[5], &gregs[13]); |
| 4283 |
err |= __get_user(env->aregs[6], &gregs[14]); |
| 4284 |
err |= __get_user(env->aregs[7], &gregs[15]); |
| 4285 |
err |= __get_user(env->pc, &gregs[16]);
|
| 4286 |
err |= __get_user(temp, &gregs[17]);
|
| 4287 |
env->sr = (env->sr & 0xff00) | (temp & 0xff); |
| 4288 |
|
| 4289 |
*pd0 = env->dregs[0];
|
| 4290 |
return err;
|
| 4291 |
|
| 4292 |
badframe:
|
| 4293 |
return 1; |
| 4294 |
} |
| 4295 |
|
| 4296 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 4297 |
target_siginfo_t *info, |
| 4298 |
target_sigset_t *set, CPUState *env) |
| 4299 |
{
|
| 4300 |
struct target_rt_sigframe *frame;
|
| 4301 |
abi_ulong frame_addr; |
| 4302 |
abi_ulong retcode_addr; |
| 4303 |
abi_ulong info_addr; |
| 4304 |
abi_ulong uc_addr; |
| 4305 |
int err = 0; |
| 4306 |
int i;
|
| 4307 |
|
| 4308 |
frame_addr = get_sigframe(ka, env, sizeof *frame);
|
| 4309 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) |
| 4310 |
goto give_sigsegv;
|
| 4311 |
|
| 4312 |
err |= __put_user(sig, &frame->sig); |
| 4313 |
|
| 4314 |
info_addr = frame_addr + offsetof(struct target_rt_sigframe, info);
|
| 4315 |
err |= __put_user(info_addr, &frame->pinfo); |
| 4316 |
|
| 4317 |
uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc);
|
| 4318 |
err |= __put_user(uc_addr, &frame->puc); |
| 4319 |
|
| 4320 |
err |= copy_siginfo_to_user(&frame->info, info); |
| 4321 |
|
| 4322 |
/* Create the ucontext */
|
| 4323 |
|
| 4324 |
err |= __put_user(0, &frame->uc.tuc_flags);
|
| 4325 |
err |= __put_user(0, &frame->uc.tuc_link);
|
| 4326 |
err |= __put_user(target_sigaltstack_used.ss_sp, |
| 4327 |
&frame->uc.tuc_stack.ss_sp); |
| 4328 |
err |= __put_user(sas_ss_flags(env->aregs[7]),
|
| 4329 |
&frame->uc.tuc_stack.ss_flags); |
| 4330 |
err |= __put_user(target_sigaltstack_used.ss_size, |
| 4331 |
&frame->uc.tuc_stack.ss_size); |
| 4332 |
err |= target_rt_setup_ucontext(&frame->uc, env); |
| 4333 |
|
| 4334 |
if (err)
|
| 4335 |
goto give_sigsegv;
|
| 4336 |
|
| 4337 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
| 4338 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
| 4339 |
goto give_sigsegv;
|
| 4340 |
} |
| 4341 |
|
| 4342 |
/* Set up to return from userspace. */
|
| 4343 |
|
| 4344 |
retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode);
|
| 4345 |
err |= __put_user(retcode_addr, &frame->pretcode); |
| 4346 |
|
| 4347 |
/* moveq #,d0; notb d0; trap #0 */
|
| 4348 |
|
| 4349 |
err |= __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16), |
| 4350 |
(long *)(frame->retcode + 0)); |
| 4351 |
err |= __put_user(0x4e40, (short *)(frame->retcode + 4)); |
| 4352 |
|
| 4353 |
if (err)
|
| 4354 |
goto give_sigsegv;
|
| 4355 |
|
| 4356 |
/* Set up to return from userspace */
|
| 4357 |
|
| 4358 |
env->aregs[7] = frame_addr;
|
| 4359 |
env->pc = ka->_sa_handler; |
| 4360 |
|
| 4361 |
unlock_user_struct(frame, frame_addr, 1);
|
| 4362 |
return;
|
| 4363 |
|
| 4364 |
give_sigsegv:
|
| 4365 |
unlock_user_struct(frame, frame_addr, 1);
|
| 4366 |
force_sig(TARGET_SIGSEGV); |
| 4367 |
} |
| 4368 |
|
| 4369 |
long do_sigreturn(CPUState *env)
|
| 4370 |
{
|
| 4371 |
struct target_sigframe *frame;
|
| 4372 |
abi_ulong frame_addr = env->aregs[7] - 4; |
| 4373 |
target_sigset_t target_set; |
| 4374 |
sigset_t set; |
| 4375 |
int d0, i;
|
| 4376 |
|
| 4377 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 4378 |
goto badframe;
|
| 4379 |
|
| 4380 |
/* set blocked signals */
|
| 4381 |
|
| 4382 |
if (__get_user(target_set.sig[0], &frame->sc.sc_mask)) |
| 4383 |
goto badframe;
|
| 4384 |
|
| 4385 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
| 4386 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
| 4387 |
goto badframe;
|
| 4388 |
} |
| 4389 |
|
| 4390 |
target_to_host_sigset_internal(&set, &target_set); |
| 4391 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 4392 |
|
| 4393 |
/* restore registers */
|
| 4394 |
|
| 4395 |
if (restore_sigcontext(env, &frame->sc, &d0))
|
| 4396 |
goto badframe;
|
| 4397 |
|
| 4398 |
unlock_user_struct(frame, frame_addr, 0);
|
| 4399 |
return d0;
|
| 4400 |
|
| 4401 |
badframe:
|
| 4402 |
unlock_user_struct(frame, frame_addr, 0);
|
| 4403 |
force_sig(TARGET_SIGSEGV); |
| 4404 |
return 0; |
| 4405 |
} |
| 4406 |
|
| 4407 |
long do_rt_sigreturn(CPUState *env)
|
| 4408 |
{
|
| 4409 |
struct target_rt_sigframe *frame;
|
| 4410 |
abi_ulong frame_addr = env->aregs[7] - 4; |
| 4411 |
target_sigset_t target_set; |
| 4412 |
sigset_t set; |
| 4413 |
int d0;
|
| 4414 |
|
| 4415 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) |
| 4416 |
goto badframe;
|
| 4417 |
|
| 4418 |
target_to_host_sigset_internal(&set, &target_set); |
| 4419 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 4420 |
|
| 4421 |
/* restore registers */
|
| 4422 |
|
| 4423 |
if (target_rt_restore_ucontext(env, &frame->uc, &d0))
|
| 4424 |
goto badframe;
|
| 4425 |
|
| 4426 |
if (do_sigaltstack(frame_addr +
|
| 4427 |
offsetof(struct target_rt_sigframe, uc.tuc_stack),
|
| 4428 |
0, get_sp_from_cpustate(env)) == -EFAULT)
|
| 4429 |
goto badframe;
|
| 4430 |
|
| 4431 |
unlock_user_struct(frame, frame_addr, 0);
|
| 4432 |
return d0;
|
| 4433 |
|
| 4434 |
badframe:
|
| 4435 |
unlock_user_struct(frame, frame_addr, 0);
|
| 4436 |
force_sig(TARGET_SIGSEGV); |
| 4437 |
return 0; |
| 4438 |
} |
| 4439 |
|
| 4440 |
#elif defined(TARGET_ALPHA)
|
| 4441 |
|
| 4442 |
struct target_sigcontext {
|
| 4443 |
abi_long sc_onstack; |
| 4444 |
abi_long sc_mask; |
| 4445 |
abi_long sc_pc; |
| 4446 |
abi_long sc_ps; |
| 4447 |
abi_long sc_regs[32];
|
| 4448 |
abi_long sc_ownedfp; |
| 4449 |
abi_long sc_fpregs[32];
|
| 4450 |
abi_ulong sc_fpcr; |
| 4451 |
abi_ulong sc_fp_control; |
| 4452 |
abi_ulong sc_reserved1; |
| 4453 |
abi_ulong sc_reserved2; |
| 4454 |
abi_ulong sc_ssize; |
| 4455 |
abi_ulong sc_sbase; |
| 4456 |
abi_ulong sc_traparg_a0; |
| 4457 |
abi_ulong sc_traparg_a1; |
| 4458 |
abi_ulong sc_traparg_a2; |
| 4459 |
abi_ulong sc_fp_trap_pc; |
| 4460 |
abi_ulong sc_fp_trigger_sum; |
| 4461 |
abi_ulong sc_fp_trigger_inst; |
| 4462 |
}; |
| 4463 |
|
| 4464 |
struct target_ucontext {
|
| 4465 |
abi_ulong tuc_flags; |
| 4466 |
abi_ulong tuc_link; |
| 4467 |
abi_ulong tuc_osf_sigmask; |
| 4468 |
target_stack_t tuc_stack; |
| 4469 |
struct target_sigcontext tuc_mcontext;
|
| 4470 |
target_sigset_t tuc_sigmask; |
| 4471 |
}; |
| 4472 |
|
| 4473 |
struct target_sigframe {
|
| 4474 |
struct target_sigcontext sc;
|
| 4475 |
unsigned int retcode[3]; |
| 4476 |
}; |
| 4477 |
|
| 4478 |
struct target_rt_sigframe {
|
| 4479 |
target_siginfo_t info; |
| 4480 |
struct target_ucontext uc;
|
| 4481 |
unsigned int retcode[3]; |
| 4482 |
}; |
| 4483 |
|
| 4484 |
#define INSN_MOV_R30_R16 0x47fe0410 |
| 4485 |
#define INSN_LDI_R0 0x201f0000 |
| 4486 |
#define INSN_CALLSYS 0x00000083 |
| 4487 |
|
| 4488 |
static int setup_sigcontext(struct target_sigcontext *sc, CPUState *env, |
| 4489 |
abi_ulong frame_addr, target_sigset_t *set) |
| 4490 |
{
|
| 4491 |
int i, err = 0; |
| 4492 |
|
| 4493 |
err |= __put_user(on_sig_stack(frame_addr), &sc->sc_onstack); |
| 4494 |
err |= __put_user(set->sig[0], &sc->sc_mask);
|
| 4495 |
err |= __put_user(env->pc, &sc->sc_pc); |
| 4496 |
err |= __put_user(8, &sc->sc_ps);
|
| 4497 |
|
| 4498 |
for (i = 0; i < 31; ++i) { |
| 4499 |
err |= __put_user(env->ir[i], &sc->sc_regs[i]); |
| 4500 |
} |
| 4501 |
err |= __put_user(0, &sc->sc_regs[31]); |
| 4502 |
|
| 4503 |
for (i = 0; i < 31; ++i) { |
| 4504 |
err |= __put_user(env->fir[i], &sc->sc_fpregs[i]); |
| 4505 |
} |
| 4506 |
err |= __put_user(0, &sc->sc_fpregs[31]); |
| 4507 |
err |= __put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr); |
| 4508 |
|
| 4509 |
err |= __put_user(0, &sc->sc_traparg_a0); /* FIXME */ |
| 4510 |
err |= __put_user(0, &sc->sc_traparg_a1); /* FIXME */ |
| 4511 |
err |= __put_user(0, &sc->sc_traparg_a2); /* FIXME */ |
| 4512 |
|
| 4513 |
return err;
|
| 4514 |
} |
| 4515 |
|
| 4516 |
static int restore_sigcontext(CPUState *env, struct target_sigcontext *sc) |
| 4517 |
{
|
| 4518 |
uint64_t fpcr; |
| 4519 |
int i, err = 0; |
| 4520 |
|
| 4521 |
err |= __get_user(env->pc, &sc->sc_pc); |
| 4522 |
|
| 4523 |
for (i = 0; i < 31; ++i) { |
| 4524 |
err |= __get_user(env->ir[i], &sc->sc_regs[i]); |
| 4525 |
} |
| 4526 |
for (i = 0; i < 31; ++i) { |
| 4527 |
err |= __get_user(env->fir[i], &sc->sc_fpregs[i]); |
| 4528 |
} |
| 4529 |
|
| 4530 |
err |= __get_user(fpcr, &sc->sc_fpcr); |
| 4531 |
cpu_alpha_store_fpcr(env, fpcr); |
| 4532 |
|
| 4533 |
return err;
|
| 4534 |
} |
| 4535 |
|
| 4536 |
static inline abi_ulong get_sigframe(struct target_sigaction *sa, |
| 4537 |
CPUState *env, unsigned long framesize) |
| 4538 |
{
|
| 4539 |
abi_ulong sp = env->ir[IR_SP]; |
| 4540 |
|
| 4541 |
/* This is the X/Open sanctioned signal stack switching. */
|
| 4542 |
if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) { |
| 4543 |
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; |
| 4544 |
} |
| 4545 |
return (sp - framesize) & -32; |
| 4546 |
} |
| 4547 |
|
| 4548 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 4549 |
target_sigset_t *set, CPUState *env) |
| 4550 |
{
|
| 4551 |
abi_ulong frame_addr, r26; |
| 4552 |
struct target_sigframe *frame;
|
| 4553 |
int err = 0; |
| 4554 |
|
| 4555 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
| 4556 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { |
| 4557 |
goto give_sigsegv;
|
| 4558 |
} |
| 4559 |
|
| 4560 |
err |= setup_sigcontext(&frame->sc, env, frame_addr, set); |
| 4561 |
|
| 4562 |
if (ka->sa_restorer) {
|
| 4563 |
r26 = ka->sa_restorer; |
| 4564 |
} else {
|
| 4565 |
err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
|
| 4566 |
err |= __put_user(INSN_LDI_R0 + TARGET_NR_sigreturn, |
| 4567 |
&frame->retcode[1]);
|
| 4568 |
err |= __put_user(INSN_CALLSYS, &frame->retcode[2]);
|
| 4569 |
/* imb() */
|
| 4570 |
r26 = frame_addr; |
| 4571 |
} |
| 4572 |
|
| 4573 |
unlock_user_struct(frame, frame_addr, 1);
|
| 4574 |
|
| 4575 |
if (err) {
|
| 4576 |
give_sigsegv:
|
| 4577 |
if (sig == TARGET_SIGSEGV) {
|
| 4578 |
ka->_sa_handler = TARGET_SIG_DFL; |
| 4579 |
} |
| 4580 |
force_sig(TARGET_SIGSEGV); |
| 4581 |
} |
| 4582 |
|
| 4583 |
env->ir[IR_RA] = r26; |
| 4584 |
env->ir[IR_PV] = env->pc = ka->_sa_handler; |
| 4585 |
env->ir[IR_A0] = sig; |
| 4586 |
env->ir[IR_A1] = 0;
|
| 4587 |
env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc);
|
| 4588 |
env->ir[IR_SP] = frame_addr; |
| 4589 |
} |
| 4590 |
|
| 4591 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 4592 |
target_siginfo_t *info, |
| 4593 |
target_sigset_t *set, CPUState *env) |
| 4594 |
{
|
| 4595 |
abi_ulong frame_addr, r26; |
| 4596 |
struct target_rt_sigframe *frame;
|
| 4597 |
int i, err = 0; |
| 4598 |
|
| 4599 |
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
| 4600 |
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { |
| 4601 |
goto give_sigsegv;
|
| 4602 |
} |
| 4603 |
|
| 4604 |
err |= copy_siginfo_to_user(&frame->info, info); |
| 4605 |
|
| 4606 |
err |= __put_user(0, &frame->uc.tuc_flags);
|
| 4607 |
err |= __put_user(0, &frame->uc.tuc_link);
|
| 4608 |
err |= __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask);
|
| 4609 |
err |= __put_user(target_sigaltstack_used.ss_sp, |
| 4610 |
&frame->uc.tuc_stack.ss_sp); |
| 4611 |
err |= __put_user(sas_ss_flags(env->ir[IR_SP]), |
| 4612 |
&frame->uc.tuc_stack.ss_flags); |
| 4613 |
err |= __put_user(target_sigaltstack_used.ss_size, |
| 4614 |
&frame->uc.tuc_stack.ss_size); |
| 4615 |
err |= setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set); |
| 4616 |
for (i = 0; i < TARGET_NSIG_WORDS; ++i) { |
| 4617 |
err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); |
| 4618 |
} |
| 4619 |
|
| 4620 |
if (ka->sa_restorer) {
|
| 4621 |
r26 = ka->sa_restorer; |
| 4622 |
} else {
|
| 4623 |
err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]);
|
| 4624 |
err |= __put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn, |
| 4625 |
&frame->retcode[1]);
|
| 4626 |
err |= __put_user(INSN_CALLSYS, &frame->retcode[2]);
|
| 4627 |
/* imb(); */
|
| 4628 |
r26 = frame_addr; |
| 4629 |
} |
| 4630 |
|
| 4631 |
if (err) {
|
| 4632 |
give_sigsegv:
|
| 4633 |
if (sig == TARGET_SIGSEGV) {
|
| 4634 |
ka->_sa_handler = TARGET_SIG_DFL; |
| 4635 |
} |
| 4636 |
force_sig(TARGET_SIGSEGV); |
| 4637 |
} |
| 4638 |
|
| 4639 |
env->ir[IR_RA] = r26; |
| 4640 |
env->ir[IR_PV] = env->pc = ka->_sa_handler; |
| 4641 |
env->ir[IR_A0] = sig; |
| 4642 |
env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info);
|
| 4643 |
env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc);
|
| 4644 |
env->ir[IR_SP] = frame_addr; |
| 4645 |
} |
| 4646 |
|
| 4647 |
long do_sigreturn(CPUState *env)
|
| 4648 |
{
|
| 4649 |
struct target_sigcontext *sc;
|
| 4650 |
abi_ulong sc_addr = env->ir[IR_A0]; |
| 4651 |
target_sigset_t target_set; |
| 4652 |
sigset_t set; |
| 4653 |
|
| 4654 |
if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) { |
| 4655 |
goto badframe;
|
| 4656 |
} |
| 4657 |
|
| 4658 |
target_sigemptyset(&target_set); |
| 4659 |
if (__get_user(target_set.sig[0], &sc->sc_mask)) { |
| 4660 |
goto badframe;
|
| 4661 |
} |
| 4662 |
|
| 4663 |
target_to_host_sigset_internal(&set, &target_set); |
| 4664 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 4665 |
|
| 4666 |
if (restore_sigcontext(env, sc)) {
|
| 4667 |
goto badframe;
|
| 4668 |
} |
| 4669 |
unlock_user_struct(sc, sc_addr, 0);
|
| 4670 |
return env->ir[IR_V0];
|
| 4671 |
|
| 4672 |
badframe:
|
| 4673 |
unlock_user_struct(sc, sc_addr, 0);
|
| 4674 |
force_sig(TARGET_SIGSEGV); |
| 4675 |
} |
| 4676 |
|
| 4677 |
long do_rt_sigreturn(CPUState *env)
|
| 4678 |
{
|
| 4679 |
abi_ulong frame_addr = env->ir[IR_A0]; |
| 4680 |
struct target_rt_sigframe *frame;
|
| 4681 |
sigset_t set; |
| 4682 |
|
| 4683 |
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { |
| 4684 |
goto badframe;
|
| 4685 |
} |
| 4686 |
target_to_host_sigset(&set, &frame->uc.tuc_sigmask); |
| 4687 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
| 4688 |
|
| 4689 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
|
| 4690 |
goto badframe;
|
| 4691 |
} |
| 4692 |
if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, |
| 4693 |
uc.tuc_stack), |
| 4694 |
0, env->ir[IR_SP]) == -EFAULT) {
|
| 4695 |
goto badframe;
|
| 4696 |
} |
| 4697 |
|
| 4698 |
unlock_user_struct(frame, frame_addr, 0);
|
| 4699 |
return env->ir[IR_V0];
|
| 4700 |
|
| 4701 |
|
| 4702 |
badframe:
|
| 4703 |
unlock_user_struct(frame, frame_addr, 0);
|
| 4704 |
force_sig(TARGET_SIGSEGV); |
| 4705 |
} |
| 4706 |
|
| 4707 |
#else
|
| 4708 |
|
| 4709 |
static void setup_frame(int sig, struct target_sigaction *ka, |
| 4710 |
target_sigset_t *set, CPUState *env) |
| 4711 |
{
|
| 4712 |
fprintf(stderr, "setup_frame: not implemented\n");
|
| 4713 |
} |
| 4714 |
|
| 4715 |
static void setup_rt_frame(int sig, struct target_sigaction *ka, |
| 4716 |
target_siginfo_t *info, |
| 4717 |
target_sigset_t *set, CPUState *env) |
| 4718 |
{
|
| 4719 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
| 4720 |
} |
| 4721 |
|
| 4722 |
long do_sigreturn(CPUState *env)
|
| 4723 |
{
|
| 4724 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
| 4725 |
return -TARGET_ENOSYS;
|
| 4726 |
} |
| 4727 |
|
| 4728 |
long do_rt_sigreturn(CPUState *env)
|
| 4729 |
{
|
| 4730 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
| 4731 |
return -TARGET_ENOSYS;
|
| 4732 |
} |
| 4733 |
|
| 4734 |
#endif
|
| 4735 |
|
| 4736 |
void process_pending_signals(CPUState *cpu_env)
|
| 4737 |
{
|
| 4738 |
int sig;
|
| 4739 |
abi_ulong handler; |
| 4740 |
sigset_t set, old_set; |
| 4741 |
target_sigset_t target_old_set; |
| 4742 |
struct emulated_sigtable *k;
|
| 4743 |
struct target_sigaction *sa;
|
| 4744 |
struct sigqueue *q;
|
| 4745 |
TaskState *ts = cpu_env->opaque; |
| 4746 |
|
| 4747 |
if (!ts->signal_pending)
|
| 4748 |
return;
|
| 4749 |
|
| 4750 |
/* FIXME: This is not threadsafe. */
|
| 4751 |
k = ts->sigtab; |
| 4752 |
for(sig = 1; sig <= TARGET_NSIG; sig++) { |
| 4753 |
if (k->pending)
|
| 4754 |
goto handle_signal;
|
| 4755 |
k++; |
| 4756 |
} |
| 4757 |
/* if no signal is pending, just return */
|
| 4758 |
ts->signal_pending = 0;
|
| 4759 |
return;
|
| 4760 |
|
| 4761 |
handle_signal:
|
| 4762 |
#ifdef DEBUG_SIGNAL
|
| 4763 |
fprintf(stderr, "qemu: process signal %d\n", sig);
|
| 4764 |
#endif
|
| 4765 |
/* dequeue signal */
|
| 4766 |
q = k->first; |
| 4767 |
k->first = q->next; |
| 4768 |
if (!k->first)
|
| 4769 |
k->pending = 0;
|
| 4770 |
|
| 4771 |
sig = gdb_handlesig (cpu_env, sig); |
| 4772 |
if (!sig) {
|
| 4773 |
sa = NULL;
|
| 4774 |
handler = TARGET_SIG_IGN; |
| 4775 |
} else {
|
| 4776 |
sa = &sigact_table[sig - 1];
|
| 4777 |
handler = sa->_sa_handler; |
| 4778 |
} |
| 4779 |
|
| 4780 |
if (handler == TARGET_SIG_DFL) {
|
| 4781 |
/* default handler : ignore some signal. The other are job control or fatal */
|
| 4782 |
if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) {
|
| 4783 |
kill(getpid(),SIGSTOP); |
| 4784 |
} else if (sig != TARGET_SIGCHLD && |
| 4785 |
sig != TARGET_SIGURG && |
| 4786 |
sig != TARGET_SIGWINCH && |
| 4787 |
sig != TARGET_SIGCONT) {
|
| 4788 |
force_sig(sig); |
| 4789 |
} |
| 4790 |
} else if (handler == TARGET_SIG_IGN) { |
| 4791 |
/* ignore sig */
|
| 4792 |
} else if (handler == TARGET_SIG_ERR) { |
| 4793 |
force_sig(sig); |
| 4794 |
} else {
|
| 4795 |
/* compute the blocked signals during the handler execution */
|
| 4796 |
target_to_host_sigset(&set, &sa->sa_mask); |
| 4797 |
/* SA_NODEFER indicates that the current signal should not be
|
| 4798 |
blocked during the handler */
|
| 4799 |
if (!(sa->sa_flags & TARGET_SA_NODEFER))
|
| 4800 |
sigaddset(&set, target_to_host_signal(sig)); |
| 4801 |
|
| 4802 |
/* block signals in the handler using Linux */
|
| 4803 |
sigprocmask(SIG_BLOCK, &set, &old_set); |
| 4804 |
/* save the previous blocked signal state to restore it at the
|
| 4805 |
end of the signal execution (see do_sigreturn) */
|
| 4806 |
host_to_target_sigset_internal(&target_old_set, &old_set); |
| 4807 |
|
| 4808 |
/* if the CPU is in VM86 mode, we restore the 32 bit values */
|
| 4809 |
#if defined(TARGET_I386) && !defined(TARGET_X86_64)
|
| 4810 |
{
|
| 4811 |
CPUX86State *env = cpu_env; |
| 4812 |
if (env->eflags & VM_MASK)
|
| 4813 |
save_v86_state(env); |
| 4814 |
} |
| 4815 |
#endif
|
| 4816 |
/* prepare the stack frame of the virtual CPU */
|
| 4817 |
if (sa->sa_flags & TARGET_SA_SIGINFO)
|
| 4818 |
setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env); |
| 4819 |
else
|
| 4820 |
setup_frame(sig, sa, &target_old_set, cpu_env); |
| 4821 |
if (sa->sa_flags & TARGET_SA_RESETHAND)
|
| 4822 |
sa->_sa_handler = TARGET_SIG_DFL; |
| 4823 |
} |
| 4824 |
if (q != &k->info)
|
| 4825 |
free_sigqueue(cpu_env, q); |
| 4826 |
} |