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Fix typos in comments (accessable -> accessible, priveleged -> privileged)
[qemu.git] / cpu-exec.c
blob395cd8cf9047bc1eec16290ffbb638afe251a0ea
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 static CPUDebugExcpHandler *debug_excp_handler;
200
201 CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
202 {
203 CPUDebugExcpHandler *old_handler = debug_excp_handler;
204
205 debug_excp_handler = handler;
206 return old_handler;
207 }
208
209 static void cpu_handle_debug_exception(CPUState *env)
210 {
211 CPUWatchpoint *wp;
212
213 if (!env->watchpoint_hit) {
214 QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
215 wp->flags &= ~BP_WATCHPOINT_HIT;
216 }
217 }
218 if (debug_excp_handler) {
219 debug_excp_handler(env);
220 }
221 }
222
223 /* main execution loop */
224
225 volatile sig_atomic_t exit_request;
226
227 int cpu_exec(CPUState *env1)
228 {
229 volatile host_reg_t saved_env_reg;
230 int ret, interrupt_request;
231 TranslationBlock *tb;
232 uint8_t *tc_ptr;
233 unsigned long next_tb;
234
235 if (env1->halted) {
236 if (!cpu_has_work(env1)) {
237 return EXCP_HALTED;
238 }
239
240 env1->halted = 0;
241 }
242
243 cpu_single_env = env1;
244
245 /* the access to env below is actually saving the global register's
246 value, so that files not including target-xyz/exec.h are free to
247 use it. */
248 QEMU_BUILD_BUG_ON (sizeof (saved_env_reg) != sizeof (env));
249 saved_env_reg = (host_reg_t) env;
250 barrier();
251 env = env1;
252
253 if (unlikely(exit_request)) {
254 env->exit_request = 1;
255 }
256
257 #if defined(TARGET_I386)
258 /* put eflags in CPU temporary format */
259 CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
260 DF = 1 - (2 * ((env->eflags >> 10) & 1));
261 CC_OP = CC_OP_EFLAGS;
262 env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
263 #elif defined(TARGET_SPARC)
264 #elif defined(TARGET_M68K)
265 env->cc_op = CC_OP_FLAGS;
266 env->cc_dest = env->sr & 0xf;
267 env->cc_x = (env->sr >> 4) & 1;
268 #elif defined(TARGET_ALPHA)
269 #elif defined(TARGET_ARM)
270 #elif defined(TARGET_UNICORE32)
271 #elif defined(TARGET_PPC)
272 #elif defined(TARGET_LM32)
273 #elif defined(TARGET_MICROBLAZE)
274 #elif defined(TARGET_MIPS)
275 #elif defined(TARGET_SH4)
276 #elif defined(TARGET_CRIS)
277 #elif defined(TARGET_S390X)
278 /* XXXXX */
279 #else
280 #error unsupported target CPU
281 #endif
282 env->exception_index = -1;
283
284 /* prepare setjmp context for exception handling */
285 for(;;) {
286 if (setjmp(env->jmp_env) == 0) {
287 #if defined(__sparc__) && !defined(CONFIG_SOLARIS)
288 #undef env
289 env = cpu_single_env;
290 #define env cpu_single_env
291 #endif
292 /* if an exception is pending, we execute it here */
293 if (env->exception_index >= 0) {
294 if (env->exception_index >= EXCP_INTERRUPT) {
295 /* exit request from the cpu execution loop */
296 ret = env->exception_index;
297 if (ret == EXCP_DEBUG) {
298 cpu_handle_debug_exception(env);
299 }
300 break;
301 } else {
302 #if defined(CONFIG_USER_ONLY)
303 /* if user mode only, we simulate a fake exception
304 which will be handled outside the cpu execution
305 loop */
306 #if defined(TARGET_I386)
307 do_interrupt_user(env->exception_index,
308 env->exception_is_int,
309 env->error_code,
310 env->exception_next_eip);
311 /* successfully delivered */
312 env->old_exception = -1;
313 #endif
314 ret = env->exception_index;
315 break;
316 #else
317 #if defined(TARGET_I386)
318 /* simulate a real cpu exception. On i386, it can
319 trigger new exceptions, but we do not handle
320 double or triple faults yet. */
321 do_interrupt(env->exception_index,
322 env->exception_is_int,
323 env->error_code,
324 env->exception_next_eip, 0);
325 /* successfully delivered */
326 env->old_exception = -1;
327 #elif defined(TARGET_PPC)
328 do_interrupt(env);
329 #elif defined(TARGET_LM32)
330 do_interrupt(env);
331 #elif defined(TARGET_MICROBLAZE)
332 do_interrupt(env);
333 #elif defined(TARGET_MIPS)
334 do_interrupt(env);
335 #elif defined(TARGET_SPARC)
336 do_interrupt(env);
337 #elif defined(TARGET_ARM)
338 do_interrupt(env);
339 #elif defined(TARGET_UNICORE32)
340 do_interrupt(env);
341 #elif defined(TARGET_SH4)
342 do_interrupt(env);
343 #elif defined(TARGET_ALPHA)
344 do_interrupt(env);
345 #elif defined(TARGET_CRIS)
346 do_interrupt(env);
347 #elif defined(TARGET_M68K)
348 do_interrupt(0);
349 #elif defined(TARGET_S390X)
350 do_interrupt(env);
351 #endif
352 env->exception_index = -1;
353 #endif
354 }
355 }
356
357 next_tb = 0; /* force lookup of first TB */
358 for(;;) {
359 interrupt_request = env->interrupt_request;
360 if (unlikely(interrupt_request)) {
361 if (unlikely(env->singlestep_enabled & SSTEP_NOIRQ)) {
362 /* Mask out external interrupts for this step. */
363 interrupt_request &= ~(CPU_INTERRUPT_HARD |
364 CPU_INTERRUPT_FIQ |
365 CPU_INTERRUPT_SMI |
366 CPU_INTERRUPT_NMI);
367 }
368 if (interrupt_request & CPU_INTERRUPT_DEBUG) {
369 env->interrupt_request &= ~CPU_INTERRUPT_DEBUG;
370 env->exception_index = EXCP_DEBUG;
371 cpu_loop_exit();
372 }
373 #if defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_MIPS) || \
374 defined(TARGET_PPC) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) || \
375 defined(TARGET_MICROBLAZE) || defined(TARGET_LM32) || defined(TARGET_UNICORE32)
376 if (interrupt_request & CPU_INTERRUPT_HALT) {
377 env->interrupt_request &= ~CPU_INTERRUPT_HALT;
378 env->halted = 1;
379 env->exception_index = EXCP_HLT;
380 cpu_loop_exit();
381 }
382 #endif
383 #if defined(TARGET_I386)
384 if (interrupt_request & CPU_INTERRUPT_INIT) {
385 svm_check_intercept(SVM_EXIT_INIT);
386 do_cpu_init(env);
387 env->exception_index = EXCP_HALTED;
388 cpu_loop_exit();
389 } else if (interrupt_request & CPU_INTERRUPT_SIPI) {
390 do_cpu_sipi(env);
391 } else if (env->hflags2 & HF2_GIF_MASK) {
392 if ((interrupt_request & CPU_INTERRUPT_SMI) &&
393 !(env->hflags & HF_SMM_MASK)) {
394 svm_check_intercept(SVM_EXIT_SMI);
395 env->interrupt_request &= ~CPU_INTERRUPT_SMI;
396 do_smm_enter();
397 next_tb = 0;
398 } else if ((interrupt_request & CPU_INTERRUPT_NMI) &&
399 !(env->hflags2 & HF2_NMI_MASK)) {
400 env->interrupt_request &= ~CPU_INTERRUPT_NMI;
401 env->hflags2 |= HF2_NMI_MASK;
402 do_interrupt(EXCP02_NMI, 0, 0, 0, 1);
403 next_tb = 0;
404 } else if (interrupt_request & CPU_INTERRUPT_MCE) {
405 env->interrupt_request &= ~CPU_INTERRUPT_MCE;
406 do_interrupt(EXCP12_MCHK, 0, 0, 0, 0);
407 next_tb = 0;
408 } else if ((interrupt_request & CPU_INTERRUPT_HARD) &&
409 (((env->hflags2 & HF2_VINTR_MASK) &&
410 (env->hflags2 & HF2_HIF_MASK)) ||
411 (!(env->hflags2 & HF2_VINTR_MASK) &&
412 (env->eflags & IF_MASK &&
413 !(env->hflags & HF_INHIBIT_IRQ_MASK))))) {
414 int intno;
415 svm_check_intercept(SVM_EXIT_INTR);
416 env->interrupt_request &= ~(CPU_INTERRUPT_HARD | CPU_INTERRUPT_VIRQ);
417 intno = cpu_get_pic_interrupt(env);
418 qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing hardware INT=0x%02x\n", intno);
419 #if defined(__sparc__) && !defined(CONFIG_SOLARIS)
420 #undef env
421 env = cpu_single_env;
422 #define env cpu_single_env
423 #endif
424 do_interrupt(intno, 0, 0, 0, 1);
425 /* ensure that no TB jump will be modified as
426 the program flow was changed */
427 next_tb = 0;
428 #if !defined(CONFIG_USER_ONLY)
429 } else if ((interrupt_request & CPU_INTERRUPT_VIRQ) &&
430 (env->eflags & IF_MASK) &&
431 !(env->hflags & HF_INHIBIT_IRQ_MASK)) {
432 int intno;
433 /* FIXME: this should respect TPR */
434 svm_check_intercept(SVM_EXIT_VINTR);
435 intno = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_vector));
436 qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing virtual hardware INT=0x%02x\n", intno);
437 do_interrupt(intno, 0, 0, 0, 1);
438 env->interrupt_request &= ~CPU_INTERRUPT_VIRQ;
439 next_tb = 0;
440 #endif
441 }
442 }
443 #elif defined(TARGET_PPC)
444 #if 0
445 if ((interrupt_request & CPU_INTERRUPT_RESET)) {
446 cpu_reset(env);
447 }
448 #endif
449 if (interrupt_request & CPU_INTERRUPT_HARD) {
450 ppc_hw_interrupt(env);
451 if (env->pending_interrupts == 0)
452 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
453 next_tb = 0;
454 }
455 #elif defined(TARGET_LM32)
456 if ((interrupt_request & CPU_INTERRUPT_HARD)
457 && (env->ie & IE_IE)) {
458 env->exception_index = EXCP_IRQ;
459 do_interrupt(env);
460 next_tb = 0;
461 }
462 #elif defined(TARGET_MICROBLAZE)
463 if ((interrupt_request & CPU_INTERRUPT_HARD)
464 && (env->sregs[SR_MSR] & MSR_IE)
465 && !(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP))
466 && !(env->iflags & (D_FLAG | IMM_FLAG))) {
467 env->exception_index = EXCP_IRQ;
468 do_interrupt(env);
469 next_tb = 0;
470 }
471 #elif defined(TARGET_MIPS)
472 if ((interrupt_request & CPU_INTERRUPT_HARD) &&
473 cpu_mips_hw_interrupts_pending(env)) {
474 /* Raise it */
475 env->exception_index = EXCP_EXT_INTERRUPT;
476 env->error_code = 0;
477 do_interrupt(env);
478 next_tb = 0;
479 }
480 #elif defined(TARGET_SPARC)
481 if (interrupt_request & CPU_INTERRUPT_HARD) {
482 if (cpu_interrupts_enabled(env) &&
483 env->interrupt_index > 0) {
484 int pil = env->interrupt_index & 0xf;
485 int type = env->interrupt_index & 0xf0;
486
487 if (((type == TT_EXTINT) &&
488 cpu_pil_allowed(env, pil)) ||
489 type != TT_EXTINT) {
490 env->exception_index = env->interrupt_index;
491 do_interrupt(env);
492 next_tb = 0;
493 }
494 }
495 } else if (interrupt_request & CPU_INTERRUPT_TIMER) {
496 //do_interrupt(0, 0, 0, 0, 0);
497 env->interrupt_request &= ~CPU_INTERRUPT_TIMER;
498 }
499 #elif defined(TARGET_ARM)
500 if (interrupt_request & CPU_INTERRUPT_FIQ
501 && !(env->uncached_cpsr & CPSR_F)) {
502 env->exception_index = EXCP_FIQ;
503 do_interrupt(env);
504 next_tb = 0;
505 }
506 /* ARMv7-M interrupt return works by loading a magic value
507 into the PC. On real hardware the load causes the
508 return to occur. The qemu implementation performs the
509 jump normally, then does the exception return when the
510 CPU tries to execute code at the magic address.
511 This will cause the magic PC value to be pushed to
512 the stack if an interrupt occured at the wrong time.
513 We avoid this by disabling interrupts when
514 pc contains a magic address. */
515 if (interrupt_request & CPU_INTERRUPT_HARD
516 && ((IS_M(env) && env->regs[15] < 0xfffffff0)
517 || !(env->uncached_cpsr & CPSR_I))) {
518 env->exception_index = EXCP_IRQ;
519 do_interrupt(env);
520 next_tb = 0;
521 }
522 #elif defined(TARGET_UNICORE32)
523 if (interrupt_request & CPU_INTERRUPT_HARD
524 && !(env->uncached_asr & ASR_I)) {
525 do_interrupt(env);
526 next_tb = 0;
527 }
528 #elif defined(TARGET_SH4)
529 if (interrupt_request & CPU_INTERRUPT_HARD) {
530 do_interrupt(env);
531 next_tb = 0;
532 }
533 #elif defined(TARGET_ALPHA)
534 if (interrupt_request & CPU_INTERRUPT_HARD) {
535 do_interrupt(env);
536 next_tb = 0;
537 }
538 #elif defined(TARGET_CRIS)
539 if (interrupt_request & CPU_INTERRUPT_HARD
540 && (env->pregs[PR_CCS] & I_FLAG)
541 && !env->locked_irq) {
542 env->exception_index = EXCP_IRQ;
543 do_interrupt(env);
544 next_tb = 0;
545 }
546 if (interrupt_request & CPU_INTERRUPT_NMI
547 && (env->pregs[PR_CCS] & M_FLAG)) {
548 env->exception_index = EXCP_NMI;
549 do_interrupt(env);
550 next_tb = 0;
551 }
552 #elif defined(TARGET_M68K)
553 if (interrupt_request & CPU_INTERRUPT_HARD
554 && ((env->sr & SR_I) >> SR_I_SHIFT)
555 < env->pending_level) {
556 /* Real hardware gets the interrupt vector via an
557 IACK cycle at this point. Current emulated
558 hardware doesn't rely on this, so we
559 provide/save the vector when the interrupt is
560 first signalled. */
561 env->exception_index = env->pending_vector;
562 do_interrupt(1);
563 next_tb = 0;
564 }
565 #elif defined(TARGET_S390X) && !defined(CONFIG_USER_ONLY)
566 if ((interrupt_request & CPU_INTERRUPT_HARD) &&
567 (env->psw.mask & PSW_MASK_EXT)) {
568 do_interrupt(env);
569 next_tb = 0;
570 }
571 #endif
572 /* Don't use the cached interupt_request value,
573 do_interrupt may have updated the EXITTB flag. */
574 if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
575 env->interrupt_request &= ~CPU_INTERRUPT_EXITTB;
576 /* ensure that no TB jump will be modified as
577 the program flow was changed */
578 next_tb = 0;
579 }
580 }
581 if (unlikely(env->exit_request)) {
582 env->exit_request = 0;
583 env->exception_index = EXCP_INTERRUPT;
584 cpu_loop_exit();
585 }
586 #if defined(DEBUG_DISAS) || defined(CONFIG_DEBUG_EXEC)
587 if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) {
588 /* restore flags in standard format */
589 #if defined(TARGET_I386)
590 env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK);
591 log_cpu_state(env, X86_DUMP_CCOP);
592 env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
593 #elif defined(TARGET_M68K)
594 cpu_m68k_flush_flags(env, env->cc_op);
595 env->cc_op = CC_OP_FLAGS;
596 env->sr = (env->sr & 0xffe0)
597 | env->cc_dest | (env->cc_x << 4);
598 log_cpu_state(env, 0);
599 #else
600 log_cpu_state(env, 0);
601 #endif
602 }
603 #endif /* DEBUG_DISAS || CONFIG_DEBUG_EXEC */
604 spin_lock(&tb_lock);
605 tb = tb_find_fast();
606 /* Note: we do it here to avoid a gcc bug on Mac OS X when
607 doing it in tb_find_slow */
608 if (tb_invalidated_flag) {
609 /* as some TB could have been invalidated because
610 of memory exceptions while generating the code, we
611 must recompute the hash index here */
612 next_tb = 0;
613 tb_invalidated_flag = 0;
614 }
615 #ifdef CONFIG_DEBUG_EXEC
616 qemu_log_mask(CPU_LOG_EXEC, "Trace 0x%08lx [" TARGET_FMT_lx "] %s\n",
617 (long)tb->tc_ptr, tb->pc,
618 lookup_symbol(tb->pc));
619 #endif
620 /* see if we can patch the calling TB. When the TB
621 spans two pages, we cannot safely do a direct
622 jump. */
623 if (next_tb != 0 && tb->page_addr[1] == -1) {
624 tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb);
625 }
626 spin_unlock(&tb_lock);
627
628 /* cpu_interrupt might be called while translating the
629 TB, but before it is linked into a potentially
630 infinite loop and becomes env->current_tb. Avoid
631 starting execution if there is a pending interrupt. */
632 env->current_tb = tb;
633 barrier();
634 if (likely(!env->exit_request)) {
635 tc_ptr = tb->tc_ptr;
636 /* execute the generated code */
637 #if defined(__sparc__) && !defined(CONFIG_SOLARIS)
638 #undef env
639 env = cpu_single_env;
640 #define env cpu_single_env
641 #endif
642 next_tb = tcg_qemu_tb_exec(tc_ptr);
643 if ((next_tb & 3) == 2) {
644 /* Instruction counter expired. */
645 int insns_left;
646 tb = (TranslationBlock *)(long)(next_tb & ~3);
647 /* Restore PC. */
648 cpu_pc_from_tb(env, tb);
649 insns_left = env->icount_decr.u32;
650 if (env->icount_extra && insns_left >= 0) {
651 /* Refill decrementer and continue execution. */
652 env->icount_extra += insns_left;
653 if (env->icount_extra > 0xffff) {
654 insns_left = 0xffff;
655 } else {
656 insns_left = env->icount_extra;
657 }
658 env->icount_extra -= insns_left;
659 env->icount_decr.u16.low = insns_left;
660 } else {
661 if (insns_left > 0) {
662 /* Execute remaining instructions. */
663 cpu_exec_nocache(insns_left, tb);
664 }
665 env->exception_index = EXCP_INTERRUPT;
666 next_tb = 0;
667 cpu_loop_exit();
668 }
669 }
670 }
671 env->current_tb = NULL;
672 /* reset soft MMU for next block (it can currently
673 only be set by a memory fault) */
674 } /* for(;;) */
675 }
676 } /* for(;;) */
677
678
679 #if defined(TARGET_I386)
680 /* restore flags in standard format */
681 env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK);
682 #elif defined(TARGET_ARM)
683 /* XXX: Save/restore host fpu exception state?. */
684 #elif defined(TARGET_UNICORE32)
685 #elif defined(TARGET_SPARC)
686 #elif defined(TARGET_PPC)
687 #elif defined(TARGET_LM32)
688 #elif defined(TARGET_M68K)
689 cpu_m68k_flush_flags(env, env->cc_op);
690 env->cc_op = CC_OP_FLAGS;
691 env->sr = (env->sr & 0xffe0)
692 | env->cc_dest | (env->cc_x << 4);
693 #elif defined(TARGET_MICROBLAZE)
694 #elif defined(TARGET_MIPS)
695 #elif defined(TARGET_SH4)
696 #elif defined(TARGET_ALPHA)
697 #elif defined(TARGET_CRIS)
698 #elif defined(TARGET_S390X)
699 /* XXXXX */
700 #else
701 #error unsupported target CPU
702 #endif
703
704 /* restore global registers */
705 barrier();
706 env = (void *) saved_env_reg;
707
708 /* fail safe : never use cpu_single_env outside cpu_exec() */
709 cpu_single_env = NULL;
710 return ret;
711 }
712
713 /* must only be called from the generated code as an exception can be
714 generated */
715 void tb_invalidate_page_range(target_ulong start, target_ulong end)
716 {
717 /* XXX: cannot enable it yet because it yields to MMU exception
718 where NIP != read address on PowerPC */
719 #if 0
720 target_ulong phys_addr;
721 phys_addr = get_phys_addr_code(env, start);
722 tb_invalidate_phys_page_range(phys_addr, phys_addr + end - start, 0);
723 #endif
724 }
725
726 #if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
727
728 void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector)
729 {
730 CPUX86State *saved_env;
731
732 saved_env = env;
733 env = s;
734 if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) {
735 selector &= 0xffff;
736 cpu_x86_load_seg_cache(env, seg_reg, selector,
737 (selector << 4), 0xffff, 0);
738 } else {
739 helper_load_seg(seg_reg, selector);
740 }
741 env = saved_env;
742 }
743
744 void cpu_x86_fsave(CPUX86State *s, target_ulong ptr, int data32)
745 {
746 CPUX86State *saved_env;
747
748 saved_env = env;
749 env = s;
750
751 helper_fsave(ptr, data32);
752
753 env = saved_env;
754 }
755
756 void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32)
757 {
758 CPUX86State *saved_env;
759
760 saved_env = env;
761 env = s;
762
763 helper_frstor(ptr, data32);
764
765 env = saved_env;
766 }
767
768 #endif /* TARGET_I386 */
769
770 #if !defined(CONFIG_SOFTMMU)
771
772 #if defined(TARGET_I386)
773 #define EXCEPTION_ACTION raise_exception_err(env->exception_index, env->error_code)
774 #else
775 #define EXCEPTION_ACTION cpu_loop_exit()
776 #endif
777
778 /* 'pc' is the host PC at which the exception was raised. 'address' is
779 the effective address of the memory exception. 'is_write' is 1 if a
780 write caused the exception and otherwise 0'. 'old_set' is the
781 signal set which should be restored */
782 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
783 int is_write, sigset_t *old_set,
784 void *puc)
785 {
786 TranslationBlock *tb;
787 int ret;
788
789 if (cpu_single_env)
790 env = cpu_single_env; /* XXX: find a correct solution for multithread */
791 #if defined(DEBUG_SIGNAL)
792 qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
793 pc, address, is_write, *(unsigned long *)old_set);
794 #endif
795 /* XXX: locking issue */
796 if (is_write && page_unprotect(h2g(address), pc, puc)) {
797 return 1;
798 }
799
800 /* see if it is an MMU fault */
801 ret = cpu_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
802 if (ret < 0)
803 return 0; /* not an MMU fault */
804 if (ret == 0)
805 return 1; /* the MMU fault was handled without causing real CPU fault */
806 /* now we have a real cpu fault */
807 tb = tb_find_pc(pc);
808 if (tb) {
809 /* the PC is inside the translated code. It means that we have
810 a virtual CPU fault */
811 cpu_restore_state(tb, env, pc);
812 }
813
814 /* we restore the process signal mask as the sigreturn should
815 do it (XXX: use sigsetjmp) */
816 sigprocmask(SIG_SETMASK, old_set, NULL);
817 EXCEPTION_ACTION;
818
819 /* never comes here */
820 return 1;
821 }
822
823 #if defined(__i386__)
824
825 #if defined(__APPLE__)
826 # include <sys/ucontext.h>
827
828 # define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
829 # define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
830 # define ERROR_sig(context) ((context)->uc_mcontext->es.err)
831 # define MASK_sig(context) ((context)->uc_sigmask)
832 #elif defined (__NetBSD__)
833 # include <ucontext.h>
834
835 # define EIP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EIP])
836 # define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
837 # define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
838 # define MASK_sig(context) ((context)->uc_sigmask)
839 #elif defined (__FreeBSD__) || defined(__DragonFly__)
840 # include <ucontext.h>
841
842 # define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.mc_eip))
843 # define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
844 # define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
845 # define MASK_sig(context) ((context)->uc_sigmask)
846 #elif defined(__OpenBSD__)
847 # define EIP_sig(context) ((context)->sc_eip)
848 # define TRAP_sig(context) ((context)->sc_trapno)
849 # define ERROR_sig(context) ((context)->sc_err)
850 # define MASK_sig(context) ((context)->sc_mask)
851 #else
852 # define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
853 # define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
854 # define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
855 # define MASK_sig(context) ((context)->uc_sigmask)
856 #endif
857
858 int cpu_signal_handler(int host_signum, void *pinfo,
859 void *puc)
860 {
861 siginfo_t *info = pinfo;
862 #if defined(__NetBSD__) || defined (__FreeBSD__) || defined(__DragonFly__)
863 ucontext_t *uc = puc;
864 #elif defined(__OpenBSD__)
865 struct sigcontext *uc = puc;
866 #else
867 struct ucontext *uc = puc;
868 #endif
869 unsigned long pc;
870 int trapno;
871
872 #ifndef REG_EIP
873 /* for glibc 2.1 */
874 #define REG_EIP EIP
875 #define REG_ERR ERR
876 #define REG_TRAPNO TRAPNO
877 #endif
878 pc = EIP_sig(uc);
879 trapno = TRAP_sig(uc);
880 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
881 trapno == 0xe ?
882 (ERROR_sig(uc) >> 1) & 1 : 0,
883 &MASK_sig(uc), puc);
884 }
885
886 #elif defined(__x86_64__)
887
888 #ifdef __NetBSD__
889 #define PC_sig(context) _UC_MACHINE_PC(context)
890 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
891 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
892 #define MASK_sig(context) ((context)->uc_sigmask)
893 #elif defined(__OpenBSD__)
894 #define PC_sig(context) ((context)->sc_rip)
895 #define TRAP_sig(context) ((context)->sc_trapno)
896 #define ERROR_sig(context) ((context)->sc_err)
897 #define MASK_sig(context) ((context)->sc_mask)
898 #elif defined (__FreeBSD__) || defined(__DragonFly__)
899 #include <ucontext.h>
900
901 #define PC_sig(context) (*((unsigned long*)&(context)->uc_mcontext.mc_rip))
902 #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
903 #define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
904 #define MASK_sig(context) ((context)->uc_sigmask)
905 #else
906 #define PC_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
907 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
908 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
909 #define MASK_sig(context) ((context)->uc_sigmask)
910 #endif
911
912 int cpu_signal_handler(int host_signum, void *pinfo,
913 void *puc)
914 {
915 siginfo_t *info = pinfo;
916 unsigned long pc;
917 #if defined(__NetBSD__) || defined (__FreeBSD__) || defined(__DragonFly__)
918 ucontext_t *uc = puc;
919 #elif defined(__OpenBSD__)
920 struct sigcontext *uc = puc;
921 #else
922 struct ucontext *uc = puc;
923 #endif
924
925 pc = PC_sig(uc);
926 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
927 TRAP_sig(uc) == 0xe ?
928 (ERROR_sig(uc) >> 1) & 1 : 0,
929 &MASK_sig(uc), puc);
930 }
931
932 #elif defined(_ARCH_PPC)
933
934 /***********************************************************************
935 * signal context platform-specific definitions
936 * From Wine
937 */
938 #ifdef linux
939 /* All Registers access - only for local access */
940 # define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
941 /* Gpr Registers access */
942 # define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
943 # define IAR_sig(context) REG_sig(nip, context) /* Program counter */
944 # define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */
945 # define CTR_sig(context) REG_sig(ctr, context) /* Count register */
946 # define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */
947 # define LR_sig(context) REG_sig(link, context) /* Link register */
948 # define CR_sig(context) REG_sig(ccr, context) /* Condition register */
949 /* Float Registers access */
950 # define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num])
951 # define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4)))
952 /* Exception Registers access */
953 # define DAR_sig(context) REG_sig(dar, context)
954 # define DSISR_sig(context) REG_sig(dsisr, context)
955 # define TRAP_sig(context) REG_sig(trap, context)
956 #endif /* linux */
957
958 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
959 #include <ucontext.h>
960 # define IAR_sig(context) ((context)->uc_mcontext.mc_srr0)
961 # define MSR_sig(context) ((context)->uc_mcontext.mc_srr1)
962 # define CTR_sig(context) ((context)->uc_mcontext.mc_ctr)
963 # define XER_sig(context) ((context)->uc_mcontext.mc_xer)
964 # define LR_sig(context) ((context)->uc_mcontext.mc_lr)
965 # define CR_sig(context) ((context)->uc_mcontext.mc_cr)
966 /* Exception Registers access */
967 # define DAR_sig(context) ((context)->uc_mcontext.mc_dar)
968 # define DSISR_sig(context) ((context)->uc_mcontext.mc_dsisr)
969 # define TRAP_sig(context) ((context)->uc_mcontext.mc_exc)
970 #endif /* __FreeBSD__|| __FreeBSD_kernel__ */
971
972 #ifdef __APPLE__
973 # include <sys/ucontext.h>
974 typedef struct ucontext SIGCONTEXT;
975 /* All Registers access - only for local access */
976 # define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
977 # define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
978 # define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
979 # define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
980 /* Gpr Registers access */
981 # define GPR_sig(reg_num, context) REG_sig(r##reg_num, context)
982 # define IAR_sig(context) REG_sig(srr0, context) /* Program counter */
983 # define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */
984 # define CTR_sig(context) REG_sig(ctr, context)
985 # define XER_sig(context) REG_sig(xer, context) /* Link register */
986 # define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */
987 # define CR_sig(context) REG_sig(cr, context) /* Condition register */
988 /* Float Registers access */
989 # define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
990 # define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context))
991 /* Exception Registers access */
992 # define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */
993 # define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
994 # define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
995 #endif /* __APPLE__ */
996
997 int cpu_signal_handler(int host_signum, void *pinfo,
998 void *puc)
999 {
1000 siginfo_t *info = pinfo;
1001 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
1002 ucontext_t *uc = puc;
1003 #else
1004 struct ucontext *uc = puc;
1005 #endif
1006 unsigned long pc;
1007 int is_write;
1008
1009 pc = IAR_sig(uc);
1010 is_write = 0;
1011 #if 0
1012 /* ppc 4xx case */
1013 if (DSISR_sig(uc) & 0x00800000)
1014 is_write = 1;
1015 #else
1016 if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000))
1017 is_write = 1;
1018 #endif
1019 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1020 is_write, &uc->uc_sigmask, puc);
1021 }
1022
1023 #elif defined(__alpha__)
1024
1025 int cpu_signal_handler(int host_signum, void *pinfo,
1026 void *puc)
1027 {
1028 siginfo_t *info = pinfo;
1029 struct ucontext *uc = puc;
1030 uint32_t *pc = uc->uc_mcontext.sc_pc;
1031 uint32_t insn = *pc;
1032 int is_write = 0;
1033
1034 /* XXX: need kernel patch to get write flag faster */
1035 switch (insn >> 26) {
1036 case 0x0d: // stw
1037 case 0x0e: // stb
1038 case 0x0f: // stq_u
1039 case 0x24: // stf
1040 case 0x25: // stg
1041 case 0x26: // sts
1042 case 0x27: // stt
1043 case 0x2c: // stl
1044 case 0x2d: // stq
1045 case 0x2e: // stl_c
1046 case 0x2f: // stq_c
1047 is_write = 1;
1048 }
1049
1050 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1051 is_write, &uc->uc_sigmask, puc);
1052 }
1053 #elif defined(__sparc__)
1054
1055 int cpu_signal_handler(int host_signum, void *pinfo,
1056 void *puc)
1057 {
1058 siginfo_t *info = pinfo;
1059 int is_write;
1060 uint32_t insn;
1061 #if !defined(__arch64__) || defined(CONFIG_SOLARIS)
1062 uint32_t *regs = (uint32_t *)(info + 1);
1063 void *sigmask = (regs + 20);
1064 /* XXX: is there a standard glibc define ? */
1065 unsigned long pc = regs[1];
1066 #else
1067 #ifdef __linux__
1068 struct sigcontext *sc = puc;
1069 unsigned long pc = sc->sigc_regs.tpc;
1070 void *sigmask = (void *)sc->sigc_mask;
1071 #elif defined(__OpenBSD__)
1072 struct sigcontext *uc = puc;
1073 unsigned long pc = uc->sc_pc;
1074 void *sigmask = (void *)(long)uc->sc_mask;
1075 #endif
1076 #endif
1077
1078 /* XXX: need kernel patch to get write flag faster */
1079 is_write = 0;
1080 insn = *(uint32_t *)pc;
1081 if ((insn >> 30) == 3) {
1082 switch((insn >> 19) & 0x3f) {
1083 case 0x05: // stb
1084 case 0x15: // stba
1085 case 0x06: // sth
1086 case 0x16: // stha
1087 case 0x04: // st
1088 case 0x14: // sta
1089 case 0x07: // std
1090 case 0x17: // stda
1091 case 0x0e: // stx
1092 case 0x1e: // stxa
1093 case 0x24: // stf
1094 case 0x34: // stfa
1095 case 0x27: // stdf
1096 case 0x37: // stdfa
1097 case 0x26: // stqf
1098 case 0x36: // stqfa
1099 case 0x25: // stfsr
1100 case 0x3c: // casa
1101 case 0x3e: // casxa
1102 is_write = 1;
1103 break;
1104 }
1105 }
1106 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1107 is_write, sigmask, NULL);
1108 }
1109
1110 #elif defined(__arm__)
1111
1112 int cpu_signal_handler(int host_signum, void *pinfo,
1113 void *puc)
1114 {
1115 siginfo_t *info = pinfo;
1116 struct ucontext *uc = puc;
1117 unsigned long pc;
1118 int is_write;
1119
1120 #if (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3))
1121 pc = uc->uc_mcontext.gregs[R15];
1122 #else
1123 pc = uc->uc_mcontext.arm_pc;
1124 #endif
1125 /* XXX: compute is_write */
1126 is_write = 0;
1127 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1128 is_write,
1129 &uc->uc_sigmask, puc);
1130 }
1131
1132 #elif defined(__mc68000)
1133
1134 int cpu_signal_handler(int host_signum, void *pinfo,
1135 void *puc)
1136 {
1137 siginfo_t *info = pinfo;
1138 struct ucontext *uc = puc;
1139 unsigned long pc;
1140 int is_write;
1141
1142 pc = uc->uc_mcontext.gregs[16];
1143 /* XXX: compute is_write */
1144 is_write = 0;
1145 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1146 is_write,
1147 &uc->uc_sigmask, puc);
1148 }
1149
1150 #elif defined(__ia64)
1151
1152 #ifndef __ISR_VALID
1153 /* This ought to be in <bits/siginfo.h>... */
1154 # define __ISR_VALID 1
1155 #endif
1156
1157 int cpu_signal_handler(int host_signum, void *pinfo, void *puc)
1158 {
1159 siginfo_t *info = pinfo;
1160 struct ucontext *uc = puc;
1161 unsigned long ip;
1162 int is_write = 0;
1163
1164 ip = uc->uc_mcontext.sc_ip;
1165 switch (host_signum) {
1166 case SIGILL:
1167 case SIGFPE:
1168 case SIGSEGV:
1169 case SIGBUS:
1170 case SIGTRAP:
1171 if (info->si_code && (info->si_segvflags & __ISR_VALID))
1172 /* ISR.W (write-access) is bit 33: */
1173 is_write = (info->si_isr >> 33) & 1;
1174 break;
1175
1176 default:
1177 break;
1178 }
1179 return handle_cpu_signal(ip, (unsigned long)info->si_addr,
1180 is_write,
1181 (sigset_t *)&uc->uc_sigmask, puc);
1182 }
1183
1184 #elif defined(__s390__)
1185
1186 int cpu_signal_handler(int host_signum, void *pinfo,
1187 void *puc)
1188 {
1189 siginfo_t *info = pinfo;
1190 struct ucontext *uc = puc;
1191 unsigned long pc;
1192 uint16_t *pinsn;
1193 int is_write = 0;
1194
1195 pc = uc->uc_mcontext.psw.addr;
1196
1197 /* ??? On linux, the non-rt signal handler has 4 (!) arguments instead
1198 of the normal 2 arguments. The 3rd argument contains the "int_code"
1199 from the hardware which does in fact contain the is_write value.
1200 The rt signal handler, as far as I can tell, does not give this value
1201 at all. Not that we could get to it from here even if it were. */
1202 /* ??? This is not even close to complete, since it ignores all
1203 of the read-modify-write instructions. */
1204 pinsn = (uint16_t *)pc;
1205 switch (pinsn[0] >> 8) {
1206 case 0x50: /* ST */
1207 case 0x42: /* STC */
1208 case 0x40: /* STH */
1209 is_write = 1;
1210 break;
1211 case 0xc4: /* RIL format insns */
1212 switch (pinsn[0] & 0xf) {
1213 case 0xf: /* STRL */
1214 case 0xb: /* STGRL */
1215 case 0x7: /* STHRL */
1216 is_write = 1;
1217 }
1218 break;
1219 case 0xe3: /* RXY format insns */
1220 switch (pinsn[2] & 0xff) {
1221 case 0x50: /* STY */
1222 case 0x24: /* STG */
1223 case 0x72: /* STCY */
1224 case 0x70: /* STHY */
1225 case 0x8e: /* STPQ */
1226 case 0x3f: /* STRVH */
1227 case 0x3e: /* STRV */
1228 case 0x2f: /* STRVG */
1229 is_write = 1;
1230 }
1231 break;
1232 }
1233 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1234 is_write, &uc->uc_sigmask, puc);
1235 }
1236
1237 #elif defined(__mips__)
1238
1239 int cpu_signal_handler(int host_signum, void *pinfo,
1240 void *puc)
1241 {
1242 siginfo_t *info = pinfo;
1243 struct ucontext *uc = puc;
1244 greg_t pc = uc->uc_mcontext.pc;
1245 int is_write;
1246
1247 /* XXX: compute is_write */
1248 is_write = 0;
1249 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1250 is_write, &uc->uc_sigmask, puc);
1251 }
1252
1253 #elif defined(__hppa__)
1254
1255 int cpu_signal_handler(int host_signum, void *pinfo,
1256 void *puc)
1257 {
1258 struct siginfo *info = pinfo;
1259 struct ucontext *uc = puc;
1260 unsigned long pc = uc->uc_mcontext.sc_iaoq[0];
1261 uint32_t insn = *(uint32_t *)pc;
1262 int is_write = 0;
1263
1264 /* XXX: need kernel patch to get write flag faster. */
1265 switch (insn >> 26) {
1266 case 0x1a: /* STW */
1267 case 0x19: /* STH */
1268 case 0x18: /* STB */
1269 case 0x1b: /* STWM */
1270 is_write = 1;
1271 break;
1272
1273 case 0x09: /* CSTWX, FSTWX, FSTWS */
1274 case 0x0b: /* CSTDX, FSTDX, FSTDS */
1275 /* Distinguish from coprocessor load ... */
1276 is_write = (insn >> 9) & 1;
1277 break;
1278
1279 case 0x03:
1280 switch ((insn >> 6) & 15) {
1281 case 0xa: /* STWS */
1282 case 0x9: /* STHS */
1283 case 0x8: /* STBS */
1284 case 0xe: /* STWAS */
1285 case 0xc: /* STBYS */
1286 is_write = 1;
1287 }
1288 break;
1289 }
1290
1291 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1292 is_write, &uc->uc_sigmask, puc);
1293 }
1294
1295 #else
1296
1297 #error host CPU specific signal handler needed
1298
1299 #endif
1300
1301 #endif /* !defined(CONFIG_SOFTMMU) */
QEmu