root / cpu-exec.c @ 6792a57b
History | View | Annotate | Download (42.9 kB)
| 1 |
/*
|
|---|---|
| 2 |
* i386 emulator main execution loop
|
| 3 |
*
|
| 4 |
* Copyright (c) 2003-2005 Fabrice Bellard
|
| 5 |
*
|
| 6 |
* This library is free software; you can redistribute it and/or
|
| 7 |
* modify it under the terms of the GNU Lesser General Public
|
| 8 |
* License as published by the Free Software Foundation; either
|
| 9 |
* version 2 of the License, or (at your option) any later version.
|
| 10 |
*
|
| 11 |
* This library 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 GNU
|
| 14 |
* Lesser General Public License for more details.
|
| 15 |
*
|
| 16 |
* You should have received a copy of the GNU Lesser General Public
|
| 17 |
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
| 18 |
*/
|
| 19 |
#include "config.h" |
| 20 |
#include "exec.h" |
| 21 |
#include "disas.h" |
| 22 |
#include "tcg.h" |
| 23 |
#include "kvm.h" |
| 24 |
#include "qemu-barrier.h" |
| 25 |
|
| 26 |
#if !defined(CONFIG_SOFTMMU)
|
| 27 |
#undef EAX
|
| 28 |
#undef ECX
|
| 29 |
#undef EDX
|
| 30 |
#undef EBX
|
| 31 |
#undef ESP
|
| 32 |
#undef EBP
|
| 33 |
#undef ESI
|
| 34 |
#undef EDI
|
| 35 |
#undef EIP
|
| 36 |
#include <signal.h> |
| 37 |
#ifdef __linux__
|
| 38 |
#include <sys/ucontext.h> |
| 39 |
#endif
|
| 40 |
#endif
|
| 41 |
|
| 42 |
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
|
| 43 |
// Work around ugly bugs in glibc that mangle global register contents
|
| 44 |
#undef env
|
| 45 |
#define env cpu_single_env
|
| 46 |
#endif
|
| 47 |
|
| 48 |
int tb_invalidated_flag;
|
| 49 |
|
| 50 |
//#define CONFIG_DEBUG_EXEC
|
| 51 |
//#define DEBUG_SIGNAL
|
| 52 |
|
| 53 |
int qemu_cpu_has_work(CPUState *env)
|
| 54 |
{
|
| 55 |
return cpu_has_work(env);
|
| 56 |
} |
| 57 |
|
| 58 |
void cpu_loop_exit(void) |
| 59 |
{
|
| 60 |
env->current_tb = NULL;
|
| 61 |
longjmp(env->jmp_env, 1);
|
| 62 |
} |
| 63 |
|
| 64 |
/* exit the current TB from a signal handler. The host registers are
|
| 65 |
restored in a state compatible with the CPU emulator
|
| 66 |
*/
|
| 67 |
void cpu_resume_from_signal(CPUState *env1, void *puc) |
| 68 |
{
|
| 69 |
#if !defined(CONFIG_SOFTMMU)
|
| 70 |
#ifdef __linux__
|
| 71 |
struct ucontext *uc = puc;
|
| 72 |
#elif defined(__OpenBSD__)
|
| 73 |
struct sigcontext *uc = puc;
|
| 74 |
#endif
|
| 75 |
#endif
|
| 76 |
|
| 77 |
env = env1; |
| 78 |
|
| 79 |
/* XXX: restore cpu registers saved in host registers */
|
| 80 |
|
| 81 |
#if !defined(CONFIG_SOFTMMU)
|
| 82 |
if (puc) {
|
| 83 |
/* XXX: use siglongjmp ? */
|
| 84 |
#ifdef __linux__
|
| 85 |
#ifdef __ia64
|
| 86 |
sigprocmask(SIG_SETMASK, (sigset_t *)&uc->uc_sigmask, NULL);
|
| 87 |
#else
|
| 88 |
sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
|
| 89 |
#endif
|
| 90 |
#elif defined(__OpenBSD__)
|
| 91 |
sigprocmask(SIG_SETMASK, &uc->sc_mask, NULL);
|
| 92 |
#endif
|
| 93 |
} |
| 94 |
#endif
|
| 95 |
env->exception_index = -1;
|
| 96 |
longjmp(env->jmp_env, 1);
|
| 97 |
} |
| 98 |
|
| 99 |
/* Execute the code without caching the generated code. An interpreter
|
| 100 |
could be used if available. */
|
| 101 |
static void cpu_exec_nocache(int max_cycles, TranslationBlock *orig_tb) |
| 102 |
{
|
| 103 |
unsigned long next_tb; |
| 104 |
TranslationBlock *tb; |
| 105 |
|
| 106 |
/* Should never happen.
|
| 107 |
We only end up here when an existing TB is too long. */
|
| 108 |
if (max_cycles > CF_COUNT_MASK)
|
| 109 |
max_cycles = CF_COUNT_MASK; |
| 110 |
|
| 111 |
tb = tb_gen_code(env, orig_tb->pc, orig_tb->cs_base, orig_tb->flags, |
| 112 |
max_cycles); |
| 113 |
env->current_tb = tb; |
| 114 |
/* execute the generated code */
|
| 115 |
next_tb = tcg_qemu_tb_exec(tb->tc_ptr); |
| 116 |
env->current_tb = NULL;
|
| 117 |
|
| 118 |
if ((next_tb & 3) == 2) { |
| 119 |
/* Restore PC. This may happen if async event occurs before
|
| 120 |
the TB starts executing. */
|
| 121 |
cpu_pc_from_tb(env, tb); |
| 122 |
} |
| 123 |
tb_phys_invalidate(tb, -1);
|
| 124 |
tb_free(tb); |
| 125 |
} |
| 126 |
|
| 127 |
static TranslationBlock *tb_find_slow(target_ulong pc,
|
| 128 |
target_ulong cs_base, |
| 129 |
uint64_t flags) |
| 130 |
{
|
| 131 |
TranslationBlock *tb, **ptb1; |
| 132 |
unsigned int h; |
| 133 |
tb_page_addr_t phys_pc, phys_page1, phys_page2; |
| 134 |
target_ulong virt_page2; |
| 135 |
|
| 136 |
tb_invalidated_flag = 0;
|
| 137 |
|
| 138 |
/* find translated block using physical mappings */
|
| 139 |
phys_pc = get_page_addr_code(env, pc); |
| 140 |
phys_page1 = phys_pc & TARGET_PAGE_MASK; |
| 141 |
phys_page2 = -1;
|
| 142 |
h = tb_phys_hash_func(phys_pc); |
| 143 |
ptb1 = &tb_phys_hash[h]; |
| 144 |
for(;;) {
|
| 145 |
tb = *ptb1; |
| 146 |
if (!tb)
|
| 147 |
goto not_found;
|
| 148 |
if (tb->pc == pc &&
|
| 149 |
tb->page_addr[0] == phys_page1 &&
|
| 150 |
tb->cs_base == cs_base && |
| 151 |
tb->flags == flags) {
|
| 152 |
/* check next page if needed */
|
| 153 |
if (tb->page_addr[1] != -1) { |
| 154 |
virt_page2 = (pc & TARGET_PAGE_MASK) + |
| 155 |
TARGET_PAGE_SIZE; |
| 156 |
phys_page2 = get_page_addr_code(env, virt_page2); |
| 157 |
if (tb->page_addr[1] == phys_page2) |
| 158 |
goto found;
|
| 159 |
} else {
|
| 160 |
goto found;
|
| 161 |
} |
| 162 |
} |
| 163 |
ptb1 = &tb->phys_hash_next; |
| 164 |
} |
| 165 |
not_found:
|
| 166 |
/* if no translated code available, then translate it now */
|
| 167 |
tb = tb_gen_code(env, pc, cs_base, flags, 0);
|
| 168 |
|
| 169 |
found:
|
| 170 |
/* Move the last found TB to the head of the list */
|
| 171 |
if (likely(*ptb1)) {
|
| 172 |
*ptb1 = tb->phys_hash_next; |
| 173 |
tb->phys_hash_next = tb_phys_hash[h]; |
| 174 |
tb_phys_hash[h] = tb; |
| 175 |
} |
| 176 |
/* we add the TB in the virtual pc hash table */
|
| 177 |
env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)] = tb; |
| 178 |
return tb;
|
| 179 |
} |
| 180 |
|
| 181 |
static inline TranslationBlock *tb_find_fast(void) |
| 182 |
{
|
| 183 |
TranslationBlock *tb; |
| 184 |
target_ulong cs_base, pc; |
| 185 |
int flags;
|
| 186 |
|
| 187 |
/* we record a subset of the CPU state. It will
|
| 188 |
always be the same before a given translated block
|
| 189 |
is executed. */
|
| 190 |
cpu_get_tb_cpu_state(env, &pc, &cs_base, &flags); |
| 191 |
tb = env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)]; |
| 192 |
if (unlikely(!tb || tb->pc != pc || tb->cs_base != cs_base ||
|
| 193 |
tb->flags != flags)) {
|
| 194 |
tb = tb_find_slow(pc, cs_base, flags); |
| 195 |
} |
| 196 |
return tb;
|
| 197 |
} |
| 198 |
|
| 199 |
/* main execution loop */
|
| 200 |
|
| 201 |
volatile sig_atomic_t exit_request;
|
| 202 |
|
| 203 |
int cpu_exec(CPUState *env1)
|
| 204 |
{
|
| 205 |
volatile host_reg_t saved_env_reg;
|
| 206 |
int ret, interrupt_request;
|
| 207 |
TranslationBlock *tb; |
| 208 |
uint8_t *tc_ptr; |
| 209 |
unsigned long next_tb; |
| 210 |
|
| 211 |
if (cpu_halted(env1) == EXCP_HALTED)
|
| 212 |
return EXCP_HALTED;
|
| 213 |
|
| 214 |
cpu_single_env = env1; |
| 215 |
|
| 216 |
/* the access to env below is actually saving the global register's
|
| 217 |
value, so that files not including target-xyz/exec.h are free to
|
| 218 |
use it. */
|
| 219 |
QEMU_BUILD_BUG_ON (sizeof (saved_env_reg) != sizeof (env)); |
| 220 |
saved_env_reg = (host_reg_t) env; |
| 221 |
barrier(); |
| 222 |
env = env1; |
| 223 |
|
| 224 |
if (unlikely(exit_request)) {
|
| 225 |
env->exit_request = 1;
|
| 226 |
} |
| 227 |
|
| 228 |
#if defined(TARGET_I386)
|
| 229 |
/* put eflags in CPU temporary format */
|
| 230 |
CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
| 231 |
DF = 1 - (2 * ((env->eflags >> 10) & 1)); |
| 232 |
CC_OP = CC_OP_EFLAGS; |
| 233 |
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
| 234 |
#elif defined(TARGET_SPARC)
|
| 235 |
#elif defined(TARGET_M68K)
|
| 236 |
env->cc_op = CC_OP_FLAGS; |
| 237 |
env->cc_dest = env->sr & 0xf;
|
| 238 |
env->cc_x = (env->sr >> 4) & 1; |
| 239 |
#elif defined(TARGET_ALPHA)
|
| 240 |
#elif defined(TARGET_ARM)
|
| 241 |
#elif defined(TARGET_PPC)
|
| 242 |
#elif defined(TARGET_MICROBLAZE)
|
| 243 |
#elif defined(TARGET_MIPS)
|
| 244 |
#elif defined(TARGET_SH4)
|
| 245 |
#elif defined(TARGET_CRIS)
|
| 246 |
#elif defined(TARGET_S390X)
|
| 247 |
/* XXXXX */
|
| 248 |
#else
|
| 249 |
#error unsupported target CPU
|
| 250 |
#endif
|
| 251 |
env->exception_index = -1;
|
| 252 |
|
| 253 |
/* prepare setjmp context for exception handling */
|
| 254 |
for(;;) {
|
| 255 |
if (setjmp(env->jmp_env) == 0) { |
| 256 |
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
|
| 257 |
#undef env
|
| 258 |
env = cpu_single_env; |
| 259 |
#define env cpu_single_env
|
| 260 |
#endif
|
| 261 |
/* if an exception is pending, we execute it here */
|
| 262 |
if (env->exception_index >= 0) { |
| 263 |
if (env->exception_index >= EXCP_INTERRUPT) {
|
| 264 |
/* exit request from the cpu execution loop */
|
| 265 |
ret = env->exception_index; |
| 266 |
break;
|
| 267 |
} else {
|
| 268 |
#if defined(CONFIG_USER_ONLY)
|
| 269 |
/* if user mode only, we simulate a fake exception
|
| 270 |
which will be handled outside the cpu execution
|
| 271 |
loop */
|
| 272 |
#if defined(TARGET_I386)
|
| 273 |
do_interrupt_user(env->exception_index, |
| 274 |
env->exception_is_int, |
| 275 |
env->error_code, |
| 276 |
env->exception_next_eip); |
| 277 |
/* successfully delivered */
|
| 278 |
env->old_exception = -1;
|
| 279 |
#endif
|
| 280 |
ret = env->exception_index; |
| 281 |
break;
|
| 282 |
#else
|
| 283 |
#if defined(TARGET_I386)
|
| 284 |
/* simulate a real cpu exception. On i386, it can
|
| 285 |
trigger new exceptions, but we do not handle
|
| 286 |
double or triple faults yet. */
|
| 287 |
do_interrupt(env->exception_index, |
| 288 |
env->exception_is_int, |
| 289 |
env->error_code, |
| 290 |
env->exception_next_eip, 0);
|
| 291 |
/* successfully delivered */
|
| 292 |
env->old_exception = -1;
|
| 293 |
#elif defined(TARGET_PPC)
|
| 294 |
do_interrupt(env); |
| 295 |
#elif defined(TARGET_MICROBLAZE)
|
| 296 |
do_interrupt(env); |
| 297 |
#elif defined(TARGET_MIPS)
|
| 298 |
do_interrupt(env); |
| 299 |
#elif defined(TARGET_SPARC)
|
| 300 |
do_interrupt(env); |
| 301 |
#elif defined(TARGET_ARM)
|
| 302 |
do_interrupt(env); |
| 303 |
#elif defined(TARGET_SH4)
|
| 304 |
do_interrupt(env); |
| 305 |
#elif defined(TARGET_ALPHA)
|
| 306 |
do_interrupt(env); |
| 307 |
#elif defined(TARGET_CRIS)
|
| 308 |
do_interrupt(env); |
| 309 |
#elif defined(TARGET_M68K)
|
| 310 |
do_interrupt(0);
|
| 311 |
#endif
|
| 312 |
env->exception_index = -1;
|
| 313 |
#endif
|
| 314 |
} |
| 315 |
} |
| 316 |
|
| 317 |
next_tb = 0; /* force lookup of first TB */ |
| 318 |
for(;;) {
|
| 319 |
interrupt_request = env->interrupt_request; |
| 320 |
if (unlikely(interrupt_request)) {
|
| 321 |
if (unlikely(env->singlestep_enabled & SSTEP_NOIRQ)) {
|
| 322 |
/* Mask out external interrupts for this step. */
|
| 323 |
interrupt_request &= ~(CPU_INTERRUPT_HARD | |
| 324 |
CPU_INTERRUPT_FIQ | |
| 325 |
CPU_INTERRUPT_SMI | |
| 326 |
CPU_INTERRUPT_NMI); |
| 327 |
} |
| 328 |
if (interrupt_request & CPU_INTERRUPT_DEBUG) {
|
| 329 |
env->interrupt_request &= ~CPU_INTERRUPT_DEBUG; |
| 330 |
env->exception_index = EXCP_DEBUG; |
| 331 |
cpu_loop_exit(); |
| 332 |
} |
| 333 |
#if defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_MIPS) || \
|
| 334 |
defined(TARGET_PPC) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) || \ |
| 335 |
defined(TARGET_MICROBLAZE) |
| 336 |
if (interrupt_request & CPU_INTERRUPT_HALT) {
|
| 337 |
env->interrupt_request &= ~CPU_INTERRUPT_HALT; |
| 338 |
env->halted = 1;
|
| 339 |
env->exception_index = EXCP_HLT; |
| 340 |
cpu_loop_exit(); |
| 341 |
} |
| 342 |
#endif
|
| 343 |
#if defined(TARGET_I386)
|
| 344 |
if (interrupt_request & CPU_INTERRUPT_INIT) {
|
| 345 |
svm_check_intercept(SVM_EXIT_INIT); |
| 346 |
do_cpu_init(env); |
| 347 |
env->exception_index = EXCP_HALTED; |
| 348 |
cpu_loop_exit(); |
| 349 |
} else if (interrupt_request & CPU_INTERRUPT_SIPI) { |
| 350 |
do_cpu_sipi(env); |
| 351 |
} else if (env->hflags2 & HF2_GIF_MASK) { |
| 352 |
if ((interrupt_request & CPU_INTERRUPT_SMI) &&
|
| 353 |
!(env->hflags & HF_SMM_MASK)) {
|
| 354 |
svm_check_intercept(SVM_EXIT_SMI); |
| 355 |
env->interrupt_request &= ~CPU_INTERRUPT_SMI; |
| 356 |
do_smm_enter(); |
| 357 |
next_tb = 0;
|
| 358 |
} else if ((interrupt_request & CPU_INTERRUPT_NMI) && |
| 359 |
!(env->hflags2 & HF2_NMI_MASK)) {
|
| 360 |
env->interrupt_request &= ~CPU_INTERRUPT_NMI; |
| 361 |
env->hflags2 |= HF2_NMI_MASK; |
| 362 |
do_interrupt(EXCP02_NMI, 0, 0, 0, 1); |
| 363 |
next_tb = 0;
|
| 364 |
} else if (interrupt_request & CPU_INTERRUPT_MCE) { |
| 365 |
env->interrupt_request &= ~CPU_INTERRUPT_MCE; |
| 366 |
do_interrupt(EXCP12_MCHK, 0, 0, 0, 0); |
| 367 |
next_tb = 0;
|
| 368 |
} else if ((interrupt_request & CPU_INTERRUPT_HARD) && |
| 369 |
(((env->hflags2 & HF2_VINTR_MASK) && |
| 370 |
(env->hflags2 & HF2_HIF_MASK)) || |
| 371 |
(!(env->hflags2 & HF2_VINTR_MASK) && |
| 372 |
(env->eflags & IF_MASK && |
| 373 |
!(env->hflags & HF_INHIBIT_IRQ_MASK))))) {
|
| 374 |
int intno;
|
| 375 |
svm_check_intercept(SVM_EXIT_INTR); |
| 376 |
env->interrupt_request &= ~(CPU_INTERRUPT_HARD | CPU_INTERRUPT_VIRQ); |
| 377 |
intno = cpu_get_pic_interrupt(env); |
| 378 |
qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing hardware INT=0x%02x\n", intno);
|
| 379 |
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
|
| 380 |
#undef env
|
| 381 |
env = cpu_single_env; |
| 382 |
#define env cpu_single_env
|
| 383 |
#endif
|
| 384 |
do_interrupt(intno, 0, 0, 0, 1); |
| 385 |
/* ensure that no TB jump will be modified as
|
| 386 |
the program flow was changed */
|
| 387 |
next_tb = 0;
|
| 388 |
#if !defined(CONFIG_USER_ONLY)
|
| 389 |
} else if ((interrupt_request & CPU_INTERRUPT_VIRQ) && |
| 390 |
(env->eflags & IF_MASK) && |
| 391 |
!(env->hflags & HF_INHIBIT_IRQ_MASK)) {
|
| 392 |
int intno;
|
| 393 |
/* FIXME: this should respect TPR */
|
| 394 |
svm_check_intercept(SVM_EXIT_VINTR); |
| 395 |
intno = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_vector));
|
| 396 |
qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing virtual hardware INT=0x%02x\n", intno);
|
| 397 |
do_interrupt(intno, 0, 0, 0, 1); |
| 398 |
env->interrupt_request &= ~CPU_INTERRUPT_VIRQ; |
| 399 |
next_tb = 0;
|
| 400 |
#endif
|
| 401 |
} |
| 402 |
} |
| 403 |
#elif defined(TARGET_PPC)
|
| 404 |
#if 0
|
| 405 |
if ((interrupt_request & CPU_INTERRUPT_RESET)) {
|
| 406 |
cpu_reset(env);
|
| 407 |
}
|
| 408 |
#endif
|
| 409 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
| 410 |
ppc_hw_interrupt(env); |
| 411 |
if (env->pending_interrupts == 0) |
| 412 |
env->interrupt_request &= ~CPU_INTERRUPT_HARD; |
| 413 |
next_tb = 0;
|
| 414 |
} |
| 415 |
#elif defined(TARGET_MICROBLAZE)
|
| 416 |
if ((interrupt_request & CPU_INTERRUPT_HARD)
|
| 417 |
&& (env->sregs[SR_MSR] & MSR_IE) |
| 418 |
&& !(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP)) |
| 419 |
&& !(env->iflags & (D_FLAG | IMM_FLAG))) {
|
| 420 |
env->exception_index = EXCP_IRQ; |
| 421 |
do_interrupt(env); |
| 422 |
next_tb = 0;
|
| 423 |
} |
| 424 |
#elif defined(TARGET_MIPS)
|
| 425 |
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
|
| 426 |
cpu_mips_hw_interrupts_pending(env)) {
|
| 427 |
/* Raise it */
|
| 428 |
env->exception_index = EXCP_EXT_INTERRUPT; |
| 429 |
env->error_code = 0;
|
| 430 |
do_interrupt(env); |
| 431 |
next_tb = 0;
|
| 432 |
} |
| 433 |
#elif defined(TARGET_SPARC)
|
| 434 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
| 435 |
if (cpu_interrupts_enabled(env) &&
|
| 436 |
env->interrupt_index > 0) {
|
| 437 |
int pil = env->interrupt_index & 0xf; |
| 438 |
int type = env->interrupt_index & 0xf0; |
| 439 |
|
| 440 |
if (((type == TT_EXTINT) &&
|
| 441 |
cpu_pil_allowed(env, pil)) || |
| 442 |
type != TT_EXTINT) {
|
| 443 |
env->exception_index = env->interrupt_index; |
| 444 |
do_interrupt(env); |
| 445 |
next_tb = 0;
|
| 446 |
} |
| 447 |
} |
| 448 |
} else if (interrupt_request & CPU_INTERRUPT_TIMER) { |
| 449 |
//do_interrupt(0, 0, 0, 0, 0);
|
| 450 |
env->interrupt_request &= ~CPU_INTERRUPT_TIMER; |
| 451 |
} |
| 452 |
#elif defined(TARGET_ARM)
|
| 453 |
if (interrupt_request & CPU_INTERRUPT_FIQ
|
| 454 |
&& !(env->uncached_cpsr & CPSR_F)) {
|
| 455 |
env->exception_index = EXCP_FIQ; |
| 456 |
do_interrupt(env); |
| 457 |
next_tb = 0;
|
| 458 |
} |
| 459 |
/* ARMv7-M interrupt return works by loading a magic value
|
| 460 |
into the PC. On real hardware the load causes the
|
| 461 |
return to occur. The qemu implementation performs the
|
| 462 |
jump normally, then does the exception return when the
|
| 463 |
CPU tries to execute code at the magic address.
|
| 464 |
This will cause the magic PC value to be pushed to
|
| 465 |
the stack if an interrupt occured at the wrong time.
|
| 466 |
We avoid this by disabling interrupts when
|
| 467 |
pc contains a magic address. */
|
| 468 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
| 469 |
&& ((IS_M(env) && env->regs[15] < 0xfffffff0) |
| 470 |
|| !(env->uncached_cpsr & CPSR_I))) {
|
| 471 |
env->exception_index = EXCP_IRQ; |
| 472 |
do_interrupt(env); |
| 473 |
next_tb = 0;
|
| 474 |
} |
| 475 |
#elif defined(TARGET_SH4)
|
| 476 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
| 477 |
do_interrupt(env); |
| 478 |
next_tb = 0;
|
| 479 |
} |
| 480 |
#elif defined(TARGET_ALPHA)
|
| 481 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
| 482 |
do_interrupt(env); |
| 483 |
next_tb = 0;
|
| 484 |
} |
| 485 |
#elif defined(TARGET_CRIS)
|
| 486 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
| 487 |
&& (env->pregs[PR_CCS] & I_FLAG) |
| 488 |
&& !env->locked_irq) {
|
| 489 |
env->exception_index = EXCP_IRQ; |
| 490 |
do_interrupt(env); |
| 491 |
next_tb = 0;
|
| 492 |
} |
| 493 |
if (interrupt_request & CPU_INTERRUPT_NMI
|
| 494 |
&& (env->pregs[PR_CCS] & M_FLAG)) {
|
| 495 |
env->exception_index = EXCP_NMI; |
| 496 |
do_interrupt(env); |
| 497 |
next_tb = 0;
|
| 498 |
} |
| 499 |
#elif defined(TARGET_M68K)
|
| 500 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
| 501 |
&& ((env->sr & SR_I) >> SR_I_SHIFT) |
| 502 |
< env->pending_level) {
|
| 503 |
/* Real hardware gets the interrupt vector via an
|
| 504 |
IACK cycle at this point. Current emulated
|
| 505 |
hardware doesn't rely on this, so we
|
| 506 |
provide/save the vector when the interrupt is
|
| 507 |
first signalled. */
|
| 508 |
env->exception_index = env->pending_vector; |
| 509 |
do_interrupt(1);
|
| 510 |
next_tb = 0;
|
| 511 |
} |
| 512 |
#endif
|
| 513 |
/* Don't use the cached interupt_request value,
|
| 514 |
do_interrupt may have updated the EXITTB flag. */
|
| 515 |
if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
|
| 516 |
env->interrupt_request &= ~CPU_INTERRUPT_EXITTB; |
| 517 |
/* ensure that no TB jump will be modified as
|
| 518 |
the program flow was changed */
|
| 519 |
next_tb = 0;
|
| 520 |
} |
| 521 |
} |
| 522 |
if (unlikely(env->exit_request)) {
|
| 523 |
env->exit_request = 0;
|
| 524 |
env->exception_index = EXCP_INTERRUPT; |
| 525 |
cpu_loop_exit(); |
| 526 |
} |
| 527 |
#if defined(DEBUG_DISAS) || defined(CONFIG_DEBUG_EXEC)
|
| 528 |
if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) {
|
| 529 |
/* restore flags in standard format */
|
| 530 |
#if defined(TARGET_I386)
|
| 531 |
env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK); |
| 532 |
log_cpu_state(env, X86_DUMP_CCOP); |
| 533 |
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
| 534 |
#elif defined(TARGET_M68K)
|
| 535 |
cpu_m68k_flush_flags(env, env->cc_op); |
| 536 |
env->cc_op = CC_OP_FLAGS; |
| 537 |
env->sr = (env->sr & 0xffe0)
|
| 538 |
| env->cc_dest | (env->cc_x << 4);
|
| 539 |
log_cpu_state(env, 0);
|
| 540 |
#else
|
| 541 |
log_cpu_state(env, 0);
|
| 542 |
#endif
|
| 543 |
} |
| 544 |
#endif /* DEBUG_DISAS || CONFIG_DEBUG_EXEC */ |
| 545 |
spin_lock(&tb_lock); |
| 546 |
tb = tb_find_fast(); |
| 547 |
/* Note: we do it here to avoid a gcc bug on Mac OS X when
|
| 548 |
doing it in tb_find_slow */
|
| 549 |
if (tb_invalidated_flag) {
|
| 550 |
/* as some TB could have been invalidated because
|
| 551 |
of memory exceptions while generating the code, we
|
| 552 |
must recompute the hash index here */
|
| 553 |
next_tb = 0;
|
| 554 |
tb_invalidated_flag = 0;
|
| 555 |
} |
| 556 |
#ifdef CONFIG_DEBUG_EXEC
|
| 557 |
qemu_log_mask(CPU_LOG_EXEC, "Trace 0x%08lx [" TARGET_FMT_lx "] %s\n", |
| 558 |
(long)tb->tc_ptr, tb->pc,
|
| 559 |
lookup_symbol(tb->pc)); |
| 560 |
#endif
|
| 561 |
/* see if we can patch the calling TB. When the TB
|
| 562 |
spans two pages, we cannot safely do a direct
|
| 563 |
jump. */
|
| 564 |
if (next_tb != 0 && tb->page_addr[1] == -1) { |
| 565 |
tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb); |
| 566 |
} |
| 567 |
spin_unlock(&tb_lock); |
| 568 |
|
| 569 |
/* cpu_interrupt might be called while translating the
|
| 570 |
TB, but before it is linked into a potentially
|
| 571 |
infinite loop and becomes env->current_tb. Avoid
|
| 572 |
starting execution if there is a pending interrupt. */
|
| 573 |
env->current_tb = tb; |
| 574 |
barrier(); |
| 575 |
if (likely(!env->exit_request)) {
|
| 576 |
tc_ptr = tb->tc_ptr; |
| 577 |
/* execute the generated code */
|
| 578 |
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
|
| 579 |
#undef env
|
| 580 |
env = cpu_single_env; |
| 581 |
#define env cpu_single_env
|
| 582 |
#endif
|
| 583 |
next_tb = tcg_qemu_tb_exec(tc_ptr); |
| 584 |
if ((next_tb & 3) == 2) { |
| 585 |
/* Instruction counter expired. */
|
| 586 |
int insns_left;
|
| 587 |
tb = (TranslationBlock *)(long)(next_tb & ~3); |
| 588 |
/* Restore PC. */
|
| 589 |
cpu_pc_from_tb(env, tb); |
| 590 |
insns_left = env->icount_decr.u32; |
| 591 |
if (env->icount_extra && insns_left >= 0) { |
| 592 |
/* Refill decrementer and continue execution. */
|
| 593 |
env->icount_extra += insns_left; |
| 594 |
if (env->icount_extra > 0xffff) { |
| 595 |
insns_left = 0xffff;
|
| 596 |
} else {
|
| 597 |
insns_left = env->icount_extra; |
| 598 |
} |
| 599 |
env->icount_extra -= insns_left; |
| 600 |
env->icount_decr.u16.low = insns_left; |
| 601 |
} else {
|
| 602 |
if (insns_left > 0) { |
| 603 |
/* Execute remaining instructions. */
|
| 604 |
cpu_exec_nocache(insns_left, tb); |
| 605 |
} |
| 606 |
env->exception_index = EXCP_INTERRUPT; |
| 607 |
next_tb = 0;
|
| 608 |
cpu_loop_exit(); |
| 609 |
} |
| 610 |
} |
| 611 |
} |
| 612 |
env->current_tb = NULL;
|
| 613 |
/* reset soft MMU for next block (it can currently
|
| 614 |
only be set by a memory fault) */
|
| 615 |
} /* for(;;) */
|
| 616 |
} |
| 617 |
} /* for(;;) */
|
| 618 |
|
| 619 |
|
| 620 |
#if defined(TARGET_I386)
|
| 621 |
/* restore flags in standard format */
|
| 622 |
env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK); |
| 623 |
#elif defined(TARGET_ARM)
|
| 624 |
/* XXX: Save/restore host fpu exception state?. */
|
| 625 |
#elif defined(TARGET_SPARC)
|
| 626 |
#elif defined(TARGET_PPC)
|
| 627 |
#elif defined(TARGET_M68K)
|
| 628 |
cpu_m68k_flush_flags(env, env->cc_op); |
| 629 |
env->cc_op = CC_OP_FLAGS; |
| 630 |
env->sr = (env->sr & 0xffe0)
|
| 631 |
| env->cc_dest | (env->cc_x << 4);
|
| 632 |
#elif defined(TARGET_MICROBLAZE)
|
| 633 |
#elif defined(TARGET_MIPS)
|
| 634 |
#elif defined(TARGET_SH4)
|
| 635 |
#elif defined(TARGET_ALPHA)
|
| 636 |
#elif defined(TARGET_CRIS)
|
| 637 |
#elif defined(TARGET_S390X)
|
| 638 |
/* XXXXX */
|
| 639 |
#else
|
| 640 |
#error unsupported target CPU
|
| 641 |
#endif
|
| 642 |
|
| 643 |
/* restore global registers */
|
| 644 |
barrier(); |
| 645 |
env = (void *) saved_env_reg;
|
| 646 |
|
| 647 |
/* fail safe : never use cpu_single_env outside cpu_exec() */
|
| 648 |
cpu_single_env = NULL;
|
| 649 |
return ret;
|
| 650 |
} |
| 651 |
|
| 652 |
/* must only be called from the generated code as an exception can be
|
| 653 |
generated */
|
| 654 |
void tb_invalidate_page_range(target_ulong start, target_ulong end)
|
| 655 |
{
|
| 656 |
/* XXX: cannot enable it yet because it yields to MMU exception
|
| 657 |
where NIP != read address on PowerPC */
|
| 658 |
#if 0
|
| 659 |
target_ulong phys_addr;
|
| 660 |
phys_addr = get_phys_addr_code(env, start);
|
| 661 |
tb_invalidate_phys_page_range(phys_addr, phys_addr + end - start, 0);
|
| 662 |
#endif
|
| 663 |
} |
| 664 |
|
| 665 |
#if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
|
| 666 |
|
| 667 |
void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector) |
| 668 |
{
|
| 669 |
CPUX86State *saved_env; |
| 670 |
|
| 671 |
saved_env = env; |
| 672 |
env = s; |
| 673 |
if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) { |
| 674 |
selector &= 0xffff;
|
| 675 |
cpu_x86_load_seg_cache(env, seg_reg, selector, |
| 676 |
(selector << 4), 0xffff, 0); |
| 677 |
} else {
|
| 678 |
helper_load_seg(seg_reg, selector); |
| 679 |
} |
| 680 |
env = saved_env; |
| 681 |
} |
| 682 |
|
| 683 |
void cpu_x86_fsave(CPUX86State *s, target_ulong ptr, int data32) |
| 684 |
{
|
| 685 |
CPUX86State *saved_env; |
| 686 |
|
| 687 |
saved_env = env; |
| 688 |
env = s; |
| 689 |
|
| 690 |
helper_fsave(ptr, data32); |
| 691 |
|
| 692 |
env = saved_env; |
| 693 |
} |
| 694 |
|
| 695 |
void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32) |
| 696 |
{
|
| 697 |
CPUX86State *saved_env; |
| 698 |
|
| 699 |
saved_env = env; |
| 700 |
env = s; |
| 701 |
|
| 702 |
helper_frstor(ptr, data32); |
| 703 |
|
| 704 |
env = saved_env; |
| 705 |
} |
| 706 |
|
| 707 |
#endif /* TARGET_I386 */ |
| 708 |
|
| 709 |
#if !defined(CONFIG_SOFTMMU)
|
| 710 |
|
| 711 |
#if defined(TARGET_I386)
|
| 712 |
#define EXCEPTION_ACTION raise_exception_err(env->exception_index, env->error_code)
|
| 713 |
#else
|
| 714 |
#define EXCEPTION_ACTION cpu_loop_exit()
|
| 715 |
#endif
|
| 716 |
|
| 717 |
/* 'pc' is the host PC at which the exception was raised. 'address' is
|
| 718 |
the effective address of the memory exception. 'is_write' is 1 if a
|
| 719 |
write caused the exception and otherwise 0'. 'old_set' is the
|
| 720 |
signal set which should be restored */
|
| 721 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
| 722 |
int is_write, sigset_t *old_set,
|
| 723 |
void *puc)
|
| 724 |
{
|
| 725 |
TranslationBlock *tb; |
| 726 |
int ret;
|
| 727 |
|
| 728 |
if (cpu_single_env)
|
| 729 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
| 730 |
#if defined(DEBUG_SIGNAL)
|
| 731 |
qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
| 732 |
pc, address, is_write, *(unsigned long *)old_set); |
| 733 |
#endif
|
| 734 |
/* XXX: locking issue */
|
| 735 |
if (is_write && page_unprotect(h2g(address), pc, puc)) {
|
| 736 |
return 1; |
| 737 |
} |
| 738 |
|
| 739 |
/* see if it is an MMU fault */
|
| 740 |
ret = cpu_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
| 741 |
if (ret < 0) |
| 742 |
return 0; /* not an MMU fault */ |
| 743 |
if (ret == 0) |
| 744 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
| 745 |
/* now we have a real cpu fault */
|
| 746 |
tb = tb_find_pc(pc); |
| 747 |
if (tb) {
|
| 748 |
/* the PC is inside the translated code. It means that we have
|
| 749 |
a virtual CPU fault */
|
| 750 |
cpu_restore_state(tb, env, pc, puc); |
| 751 |
} |
| 752 |
|
| 753 |
/* we restore the process signal mask as the sigreturn should
|
| 754 |
do it (XXX: use sigsetjmp) */
|
| 755 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
| 756 |
EXCEPTION_ACTION; |
| 757 |
|
| 758 |
/* never comes here */
|
| 759 |
return 1; |
| 760 |
} |
| 761 |
|
| 762 |
#if defined(__i386__)
|
| 763 |
|
| 764 |
#if defined(__APPLE__)
|
| 765 |
# include <sys/ucontext.h> |
| 766 |
|
| 767 |
# define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip)) |
| 768 |
# define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
|
| 769 |
# define ERROR_sig(context) ((context)->uc_mcontext->es.err)
|
| 770 |
# define MASK_sig(context) ((context)->uc_sigmask)
|
| 771 |
#elif defined (__NetBSD__)
|
| 772 |
# include <ucontext.h> |
| 773 |
|
| 774 |
# define EIP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EIP])
|
| 775 |
# define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
|
| 776 |
# define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
|
| 777 |
# define MASK_sig(context) ((context)->uc_sigmask)
|
| 778 |
#elif defined (__FreeBSD__) || defined(__DragonFly__)
|
| 779 |
# include <ucontext.h> |
| 780 |
|
| 781 |
# define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.mc_eip)) |
| 782 |
# define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
|
| 783 |
# define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
|
| 784 |
# define MASK_sig(context) ((context)->uc_sigmask)
|
| 785 |
#elif defined(__OpenBSD__)
|
| 786 |
# define EIP_sig(context) ((context)->sc_eip)
|
| 787 |
# define TRAP_sig(context) ((context)->sc_trapno)
|
| 788 |
# define ERROR_sig(context) ((context)->sc_err)
|
| 789 |
# define MASK_sig(context) ((context)->sc_mask)
|
| 790 |
#else
|
| 791 |
# define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
|
| 792 |
# define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
|
| 793 |
# define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
|
| 794 |
# define MASK_sig(context) ((context)->uc_sigmask)
|
| 795 |
#endif
|
| 796 |
|
| 797 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 798 |
void *puc)
|
| 799 |
{
|
| 800 |
siginfo_t *info = pinfo; |
| 801 |
#if defined(__NetBSD__) || defined (__FreeBSD__) || defined(__DragonFly__)
|
| 802 |
ucontext_t *uc = puc; |
| 803 |
#elif defined(__OpenBSD__)
|
| 804 |
struct sigcontext *uc = puc;
|
| 805 |
#else
|
| 806 |
struct ucontext *uc = puc;
|
| 807 |
#endif
|
| 808 |
unsigned long pc; |
| 809 |
int trapno;
|
| 810 |
|
| 811 |
#ifndef REG_EIP
|
| 812 |
/* for glibc 2.1 */
|
| 813 |
#define REG_EIP EIP
|
| 814 |
#define REG_ERR ERR
|
| 815 |
#define REG_TRAPNO TRAPNO
|
| 816 |
#endif
|
| 817 |
pc = EIP_sig(uc); |
| 818 |
trapno = TRAP_sig(uc); |
| 819 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 820 |
trapno == 0xe ?
|
| 821 |
(ERROR_sig(uc) >> 1) & 1 : 0, |
| 822 |
&MASK_sig(uc), puc); |
| 823 |
} |
| 824 |
|
| 825 |
#elif defined(__x86_64__)
|
| 826 |
|
| 827 |
#ifdef __NetBSD__
|
| 828 |
#define PC_sig(context) _UC_MACHINE_PC(context)
|
| 829 |
#define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
|
| 830 |
#define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
|
| 831 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
| 832 |
#elif defined(__OpenBSD__)
|
| 833 |
#define PC_sig(context) ((context)->sc_rip)
|
| 834 |
#define TRAP_sig(context) ((context)->sc_trapno)
|
| 835 |
#define ERROR_sig(context) ((context)->sc_err)
|
| 836 |
#define MASK_sig(context) ((context)->sc_mask)
|
| 837 |
#elif defined (__FreeBSD__) || defined(__DragonFly__)
|
| 838 |
#include <ucontext.h> |
| 839 |
|
| 840 |
#define PC_sig(context) (*((unsigned long*)&(context)->uc_mcontext.mc_rip)) |
| 841 |
#define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
|
| 842 |
#define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
|
| 843 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
| 844 |
#else
|
| 845 |
#define PC_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
|
| 846 |
#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
|
| 847 |
#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
|
| 848 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
| 849 |
#endif
|
| 850 |
|
| 851 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 852 |
void *puc)
|
| 853 |
{
|
| 854 |
siginfo_t *info = pinfo; |
| 855 |
unsigned long pc; |
| 856 |
#if defined(__NetBSD__) || defined (__FreeBSD__) || defined(__DragonFly__)
|
| 857 |
ucontext_t *uc = puc; |
| 858 |
#elif defined(__OpenBSD__)
|
| 859 |
struct sigcontext *uc = puc;
|
| 860 |
#else
|
| 861 |
struct ucontext *uc = puc;
|
| 862 |
#endif
|
| 863 |
|
| 864 |
pc = PC_sig(uc); |
| 865 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 866 |
TRAP_sig(uc) == 0xe ?
|
| 867 |
(ERROR_sig(uc) >> 1) & 1 : 0, |
| 868 |
&MASK_sig(uc), puc); |
| 869 |
} |
| 870 |
|
| 871 |
#elif defined(_ARCH_PPC)
|
| 872 |
|
| 873 |
/***********************************************************************
|
| 874 |
* signal context platform-specific definitions
|
| 875 |
* From Wine
|
| 876 |
*/
|
| 877 |
#ifdef linux
|
| 878 |
/* All Registers access - only for local access */
|
| 879 |
# define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
|
| 880 |
/* Gpr Registers access */
|
| 881 |
# define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
|
| 882 |
# define IAR_sig(context) REG_sig(nip, context) /* Program counter */ |
| 883 |
# define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */ |
| 884 |
# define CTR_sig(context) REG_sig(ctr, context) /* Count register */ |
| 885 |
# define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */ |
| 886 |
# define LR_sig(context) REG_sig(link, context) /* Link register */ |
| 887 |
# define CR_sig(context) REG_sig(ccr, context) /* Condition register */ |
| 888 |
/* Float Registers access */
|
| 889 |
# define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num]) |
| 890 |
# define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4))) |
| 891 |
/* Exception Registers access */
|
| 892 |
# define DAR_sig(context) REG_sig(dar, context)
|
| 893 |
# define DSISR_sig(context) REG_sig(dsisr, context)
|
| 894 |
# define TRAP_sig(context) REG_sig(trap, context)
|
| 895 |
#endif /* linux */ |
| 896 |
|
| 897 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
| 898 |
#include <ucontext.h> |
| 899 |
# define IAR_sig(context) ((context)->uc_mcontext.mc_srr0)
|
| 900 |
# define MSR_sig(context) ((context)->uc_mcontext.mc_srr1)
|
| 901 |
# define CTR_sig(context) ((context)->uc_mcontext.mc_ctr)
|
| 902 |
# define XER_sig(context) ((context)->uc_mcontext.mc_xer)
|
| 903 |
# define LR_sig(context) ((context)->uc_mcontext.mc_lr)
|
| 904 |
# define CR_sig(context) ((context)->uc_mcontext.mc_cr)
|
| 905 |
/* Exception Registers access */
|
| 906 |
# define DAR_sig(context) ((context)->uc_mcontext.mc_dar)
|
| 907 |
# define DSISR_sig(context) ((context)->uc_mcontext.mc_dsisr)
|
| 908 |
# define TRAP_sig(context) ((context)->uc_mcontext.mc_exc)
|
| 909 |
#endif /* __FreeBSD__|| __FreeBSD_kernel__ */ |
| 910 |
|
| 911 |
#ifdef __APPLE__
|
| 912 |
# include <sys/ucontext.h> |
| 913 |
typedef struct ucontext SIGCONTEXT; |
| 914 |
/* All Registers access - only for local access */
|
| 915 |
# define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
|
| 916 |
# define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
|
| 917 |
# define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
|
| 918 |
# define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
|
| 919 |
/* Gpr Registers access */
|
| 920 |
# define GPR_sig(reg_num, context) REG_sig(r##reg_num, context) |
| 921 |
# define IAR_sig(context) REG_sig(srr0, context) /* Program counter */ |
| 922 |
# define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */ |
| 923 |
# define CTR_sig(context) REG_sig(ctr, context)
|
| 924 |
# define XER_sig(context) REG_sig(xer, context) /* Link register */ |
| 925 |
# define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */ |
| 926 |
# define CR_sig(context) REG_sig(cr, context) /* Condition register */ |
| 927 |
/* Float Registers access */
|
| 928 |
# define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
|
| 929 |
# define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context)) |
| 930 |
/* Exception Registers access */
|
| 931 |
# define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */ |
| 932 |
# define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
|
| 933 |
# define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */ |
| 934 |
#endif /* __APPLE__ */ |
| 935 |
|
| 936 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 937 |
void *puc)
|
| 938 |
{
|
| 939 |
siginfo_t *info = pinfo; |
| 940 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
| 941 |
ucontext_t *uc = puc; |
| 942 |
#else
|
| 943 |
struct ucontext *uc = puc;
|
| 944 |
#endif
|
| 945 |
unsigned long pc; |
| 946 |
int is_write;
|
| 947 |
|
| 948 |
pc = IAR_sig(uc); |
| 949 |
is_write = 0;
|
| 950 |
#if 0
|
| 951 |
/* ppc 4xx case */
|
| 952 |
if (DSISR_sig(uc) & 0x00800000)
|
| 953 |
is_write = 1;
|
| 954 |
#else
|
| 955 |
if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000)) |
| 956 |
is_write = 1;
|
| 957 |
#endif
|
| 958 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 959 |
is_write, &uc->uc_sigmask, puc); |
| 960 |
} |
| 961 |
|
| 962 |
#elif defined(__alpha__)
|
| 963 |
|
| 964 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 965 |
void *puc)
|
| 966 |
{
|
| 967 |
siginfo_t *info = pinfo; |
| 968 |
struct ucontext *uc = puc;
|
| 969 |
uint32_t *pc = uc->uc_mcontext.sc_pc; |
| 970 |
uint32_t insn = *pc; |
| 971 |
int is_write = 0; |
| 972 |
|
| 973 |
/* XXX: need kernel patch to get write flag faster */
|
| 974 |
switch (insn >> 26) { |
| 975 |
case 0x0d: // stw |
| 976 |
case 0x0e: // stb |
| 977 |
case 0x0f: // stq_u |
| 978 |
case 0x24: // stf |
| 979 |
case 0x25: // stg |
| 980 |
case 0x26: // sts |
| 981 |
case 0x27: // stt |
| 982 |
case 0x2c: // stl |
| 983 |
case 0x2d: // stq |
| 984 |
case 0x2e: // stl_c |
| 985 |
case 0x2f: // stq_c |
| 986 |
is_write = 1;
|
| 987 |
} |
| 988 |
|
| 989 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 990 |
is_write, &uc->uc_sigmask, puc); |
| 991 |
} |
| 992 |
#elif defined(__sparc__)
|
| 993 |
|
| 994 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 995 |
void *puc)
|
| 996 |
{
|
| 997 |
siginfo_t *info = pinfo; |
| 998 |
int is_write;
|
| 999 |
uint32_t insn; |
| 1000 |
#if !defined(__arch64__) || defined(CONFIG_SOLARIS)
|
| 1001 |
uint32_t *regs = (uint32_t *)(info + 1);
|
| 1002 |
void *sigmask = (regs + 20); |
| 1003 |
/* XXX: is there a standard glibc define ? */
|
| 1004 |
unsigned long pc = regs[1]; |
| 1005 |
#else
|
| 1006 |
#ifdef __linux__
|
| 1007 |
struct sigcontext *sc = puc;
|
| 1008 |
unsigned long pc = sc->sigc_regs.tpc; |
| 1009 |
void *sigmask = (void *)sc->sigc_mask; |
| 1010 |
#elif defined(__OpenBSD__)
|
| 1011 |
struct sigcontext *uc = puc;
|
| 1012 |
unsigned long pc = uc->sc_pc; |
| 1013 |
void *sigmask = (void *)(long)uc->sc_mask; |
| 1014 |
#endif
|
| 1015 |
#endif
|
| 1016 |
|
| 1017 |
/* XXX: need kernel patch to get write flag faster */
|
| 1018 |
is_write = 0;
|
| 1019 |
insn = *(uint32_t *)pc; |
| 1020 |
if ((insn >> 30) == 3) { |
| 1021 |
switch((insn >> 19) & 0x3f) { |
| 1022 |
case 0x05: // stb |
| 1023 |
case 0x15: // stba |
| 1024 |
case 0x06: // sth |
| 1025 |
case 0x16: // stha |
| 1026 |
case 0x04: // st |
| 1027 |
case 0x14: // sta |
| 1028 |
case 0x07: // std |
| 1029 |
case 0x17: // stda |
| 1030 |
case 0x0e: // stx |
| 1031 |
case 0x1e: // stxa |
| 1032 |
case 0x24: // stf |
| 1033 |
case 0x34: // stfa |
| 1034 |
case 0x27: // stdf |
| 1035 |
case 0x37: // stdfa |
| 1036 |
case 0x26: // stqf |
| 1037 |
case 0x36: // stqfa |
| 1038 |
case 0x25: // stfsr |
| 1039 |
case 0x3c: // casa |
| 1040 |
case 0x3e: // casxa |
| 1041 |
is_write = 1;
|
| 1042 |
break;
|
| 1043 |
} |
| 1044 |
} |
| 1045 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1046 |
is_write, sigmask, NULL);
|
| 1047 |
} |
| 1048 |
|
| 1049 |
#elif defined(__arm__)
|
| 1050 |
|
| 1051 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1052 |
void *puc)
|
| 1053 |
{
|
| 1054 |
siginfo_t *info = pinfo; |
| 1055 |
struct ucontext *uc = puc;
|
| 1056 |
unsigned long pc; |
| 1057 |
int is_write;
|
| 1058 |
|
| 1059 |
#if (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3)) |
| 1060 |
pc = uc->uc_mcontext.gregs[R15]; |
| 1061 |
#else
|
| 1062 |
pc = uc->uc_mcontext.arm_pc; |
| 1063 |
#endif
|
| 1064 |
/* XXX: compute is_write */
|
| 1065 |
is_write = 0;
|
| 1066 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1067 |
is_write, |
| 1068 |
&uc->uc_sigmask, puc); |
| 1069 |
} |
| 1070 |
|
| 1071 |
#elif defined(__mc68000)
|
| 1072 |
|
| 1073 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1074 |
void *puc)
|
| 1075 |
{
|
| 1076 |
siginfo_t *info = pinfo; |
| 1077 |
struct ucontext *uc = puc;
|
| 1078 |
unsigned long pc; |
| 1079 |
int is_write;
|
| 1080 |
|
| 1081 |
pc = uc->uc_mcontext.gregs[16];
|
| 1082 |
/* XXX: compute is_write */
|
| 1083 |
is_write = 0;
|
| 1084 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1085 |
is_write, |
| 1086 |
&uc->uc_sigmask, puc); |
| 1087 |
} |
| 1088 |
|
| 1089 |
#elif defined(__ia64)
|
| 1090 |
|
| 1091 |
#ifndef __ISR_VALID
|
| 1092 |
/* This ought to be in <bits/siginfo.h>... */
|
| 1093 |
# define __ISR_VALID 1 |
| 1094 |
#endif
|
| 1095 |
|
| 1096 |
int cpu_signal_handler(int host_signum, void *pinfo, void *puc) |
| 1097 |
{
|
| 1098 |
siginfo_t *info = pinfo; |
| 1099 |
struct ucontext *uc = puc;
|
| 1100 |
unsigned long ip; |
| 1101 |
int is_write = 0; |
| 1102 |
|
| 1103 |
ip = uc->uc_mcontext.sc_ip; |
| 1104 |
switch (host_signum) {
|
| 1105 |
case SIGILL:
|
| 1106 |
case SIGFPE:
|
| 1107 |
case SIGSEGV:
|
| 1108 |
case SIGBUS:
|
| 1109 |
case SIGTRAP:
|
| 1110 |
if (info->si_code && (info->si_segvflags & __ISR_VALID))
|
| 1111 |
/* ISR.W (write-access) is bit 33: */
|
| 1112 |
is_write = (info->si_isr >> 33) & 1; |
| 1113 |
break;
|
| 1114 |
|
| 1115 |
default:
|
| 1116 |
break;
|
| 1117 |
} |
| 1118 |
return handle_cpu_signal(ip, (unsigned long)info->si_addr, |
| 1119 |
is_write, |
| 1120 |
(sigset_t *)&uc->uc_sigmask, puc); |
| 1121 |
} |
| 1122 |
|
| 1123 |
#elif defined(__s390__)
|
| 1124 |
|
| 1125 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1126 |
void *puc)
|
| 1127 |
{
|
| 1128 |
siginfo_t *info = pinfo; |
| 1129 |
struct ucontext *uc = puc;
|
| 1130 |
unsigned long pc; |
| 1131 |
uint16_t *pinsn; |
| 1132 |
int is_write = 0; |
| 1133 |
|
| 1134 |
pc = uc->uc_mcontext.psw.addr; |
| 1135 |
|
| 1136 |
/* ??? On linux, the non-rt signal handler has 4 (!) arguments instead
|
| 1137 |
of the normal 2 arguments. The 3rd argument contains the "int_code"
|
| 1138 |
from the hardware which does in fact contain the is_write value.
|
| 1139 |
The rt signal handler, as far as I can tell, does not give this value
|
| 1140 |
at all. Not that we could get to it from here even if it were. */
|
| 1141 |
/* ??? This is not even close to complete, since it ignores all
|
| 1142 |
of the read-modify-write instructions. */
|
| 1143 |
pinsn = (uint16_t *)pc; |
| 1144 |
switch (pinsn[0] >> 8) { |
| 1145 |
case 0x50: /* ST */ |
| 1146 |
case 0x42: /* STC */ |
| 1147 |
case 0x40: /* STH */ |
| 1148 |
is_write = 1;
|
| 1149 |
break;
|
| 1150 |
case 0xc4: /* RIL format insns */ |
| 1151 |
switch (pinsn[0] & 0xf) { |
| 1152 |
case 0xf: /* STRL */ |
| 1153 |
case 0xb: /* STGRL */ |
| 1154 |
case 0x7: /* STHRL */ |
| 1155 |
is_write = 1;
|
| 1156 |
} |
| 1157 |
break;
|
| 1158 |
case 0xe3: /* RXY format insns */ |
| 1159 |
switch (pinsn[2] & 0xff) { |
| 1160 |
case 0x50: /* STY */ |
| 1161 |
case 0x24: /* STG */ |
| 1162 |
case 0x72: /* STCY */ |
| 1163 |
case 0x70: /* STHY */ |
| 1164 |
case 0x8e: /* STPQ */ |
| 1165 |
case 0x3f: /* STRVH */ |
| 1166 |
case 0x3e: /* STRV */ |
| 1167 |
case 0x2f: /* STRVG */ |
| 1168 |
is_write = 1;
|
| 1169 |
} |
| 1170 |
break;
|
| 1171 |
} |
| 1172 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1173 |
is_write, &uc->uc_sigmask, puc); |
| 1174 |
} |
| 1175 |
|
| 1176 |
#elif defined(__mips__)
|
| 1177 |
|
| 1178 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1179 |
void *puc)
|
| 1180 |
{
|
| 1181 |
siginfo_t *info = pinfo; |
| 1182 |
struct ucontext *uc = puc;
|
| 1183 |
greg_t pc = uc->uc_mcontext.pc; |
| 1184 |
int is_write;
|
| 1185 |
|
| 1186 |
/* XXX: compute is_write */
|
| 1187 |
is_write = 0;
|
| 1188 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1189 |
is_write, &uc->uc_sigmask, puc); |
| 1190 |
} |
| 1191 |
|
| 1192 |
#elif defined(__hppa__)
|
| 1193 |
|
| 1194 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1195 |
void *puc)
|
| 1196 |
{
|
| 1197 |
struct siginfo *info = pinfo;
|
| 1198 |
struct ucontext *uc = puc;
|
| 1199 |
unsigned long pc = uc->uc_mcontext.sc_iaoq[0]; |
| 1200 |
uint32_t insn = *(uint32_t *)pc; |
| 1201 |
int is_write = 0; |
| 1202 |
|
| 1203 |
/* XXX: need kernel patch to get write flag faster. */
|
| 1204 |
switch (insn >> 26) { |
| 1205 |
case 0x1a: /* STW */ |
| 1206 |
case 0x19: /* STH */ |
| 1207 |
case 0x18: /* STB */ |
| 1208 |
case 0x1b: /* STWM */ |
| 1209 |
is_write = 1;
|
| 1210 |
break;
|
| 1211 |
|
| 1212 |
case 0x09: /* CSTWX, FSTWX, FSTWS */ |
| 1213 |
case 0x0b: /* CSTDX, FSTDX, FSTDS */ |
| 1214 |
/* Distinguish from coprocessor load ... */
|
| 1215 |
is_write = (insn >> 9) & 1; |
| 1216 |
break;
|
| 1217 |
|
| 1218 |
case 0x03: |
| 1219 |
switch ((insn >> 6) & 15) { |
| 1220 |
case 0xa: /* STWS */ |
| 1221 |
case 0x9: /* STHS */ |
| 1222 |
case 0x8: /* STBS */ |
| 1223 |
case 0xe: /* STWAS */ |
| 1224 |
case 0xc: /* STBYS */ |
| 1225 |
is_write = 1;
|
| 1226 |
} |
| 1227 |
break;
|
| 1228 |
} |
| 1229 |
|
| 1230 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1231 |
is_write, &uc->uc_sigmask, puc); |
| 1232 |
} |
| 1233 |
|
| 1234 |
#else
|
| 1235 |
|
| 1236 |
#error host CPU specific signal handler needed
|
| 1237 |
|
| 1238 |
#endif
|
| 1239 |
|
| 1240 |
#endif /* !defined(CONFIG_SOFTMMU) */ |