cpu-exec.c@ 9902

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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, write to the Free Software
18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19	*/
20	#include "config.h"
21	#include "exec.h"
22	#include "disas.h"
23
24	#if !defined(CONFIG_SOFTMMU)
25	#undef EAX
26	#undef ECX
27	#undef EDX
28	#undef EBX
29	#undef ESP
30	#undef EBP
31	#undef ESI
32	#undef EDI
33	#undef EIP
34	#include <signal.h>
35	#include <sys/ucontext.h>
36	#endif
37
38	int tb_invalidated_flag;
39
40	//#define DEBUG_EXEC
41	//#define DEBUG_SIGNAL
42
43	#if defined(TARGET_ARM) \|\| defined(TARGET_SPARC) \|\| defined(TARGET_M68K)
44	/* XXX: unify with i386 target */
45	void cpu_loop_exit(void)
46	{
47	longjmp(env->jmp_env, 1);
48	}
49	#endif
50	#if !(defined(TARGET_SPARC) \|\| defined(TARGET_SH4) \|\| defined(TARGET_M68K))
51	#define reg_T2
52	#endif
53
54	/* exit the current TB from a signal handler. The host registers are
55	restored in a state compatible with the CPU emulator
56	*/
57	void cpu_resume_from_signal(CPUState env1, void puc)
58	{
59	#if !defined(CONFIG_SOFTMMU)
60	struct ucontext *uc = puc;
61	#endif
62
63	env = env1;
64
65	/* XXX: restore cpu registers saved in host registers */
66
67	#if !defined(CONFIG_SOFTMMU)
68	if (puc) {
69	/* XXX: use siglongjmp ? */
70	sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
71	}
72	#endif
73	longjmp(env->jmp_env, 1);
74	}
75
76
77	static TranslationBlock *tb_find_slow(target_ulong pc,
78	target_ulong cs_base,
79	unsigned int flags)
80	{
81	TranslationBlock tb, *ptb1;
82	int code_gen_size;
83	unsigned int h;
84	target_ulong phys_pc, phys_page1, phys_page2, virt_page2;
85	uint8_t *tc_ptr;
86
87	spin_lock(&tb_lock);
88
89	tb_invalidated_flag = 0;
90
91	regs_to_env(); /* XXX: do it just before cpu_gen_code() */
92
93	/* find translated block using physical mappings */
94	phys_pc = get_phys_addr_code(env, pc);
95	phys_page1 = phys_pc & TARGET_PAGE_MASK;
96	phys_page2 = -1;
97	h = tb_phys_hash_func(phys_pc);
98	ptb1 = &tb_phys_hash[h];
99	for(;;) {
100	tb = *ptb1;
101	if (!tb)
102	goto not_found;
103	if (tb->pc == pc &&
104	tb->page_addr[0] == phys_page1 &&
105	tb->cs_base == cs_base &&
106	tb->flags == flags) {
107	/* check next page if needed */
108	if (tb->page_addr[1] != -1) {
109	virt_page2 = (pc & TARGET_PAGE_MASK) +
110	TARGET_PAGE_SIZE;
111	phys_page2 = get_phys_addr_code(env, virt_page2);
112	if (tb->page_addr[1] == phys_page2)
113	goto found;
114	} else {
115	goto found;
116	}
117	}
118	ptb1 = &tb->phys_hash_next;
119	}
120	not_found:
121	/* if no translated code available, then translate it now */
122	tb = tb_alloc(pc);
123	if (!tb) {
124	/* flush must be done */
125	tb_flush(env);
126	/* cannot fail at this point */
127	tb = tb_alloc(pc);
128	/* don't forget to invalidate previous TB info */
129	tb_invalidated_flag = 1;
130	}
131	tc_ptr = code_gen_ptr;
132	tb->tc_ptr = tc_ptr;
133	tb->cs_base = cs_base;
134	tb->flags = flags;
135	cpu_gen_code(env, tb, CODE_GEN_MAX_SIZE, &code_gen_size);
136	code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1));
137
138	/* check next page if needed */
139	virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK;
140	phys_page2 = -1;
141	if ((pc & TARGET_PAGE_MASK) != virt_page2) {
142	phys_page2 = get_phys_addr_code(env, virt_page2);
143	}
144	tb_link_phys(tb, phys_pc, phys_page2);
145
146	found:
147	/* we add the TB in the virtual pc hash table */
148	env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)] = tb;
149	spin_unlock(&tb_lock);
150	return tb;
151	}
152
153	static inline TranslationBlock *tb_find_fast(void)
154	{
155	TranslationBlock *tb;
156	target_ulong cs_base, pc;
157	unsigned int flags;
158
159	/* we record a subset of the CPU state. It will
160	always be the same before a given translated block
161	is executed. */
162	#if defined(TARGET_I386)
163	flags = env->hflags;
164	flags \|= (env->eflags & (IOPL_MASK \| TF_MASK \| VM_MASK));
165	cs_base = env->segs[R_CS].base;
166	pc = cs_base + env->eip;
167	#elif defined(TARGET_ARM)
168	flags = env->thumb \| (env->vfp.vec_len << 1)
169	\| (env->vfp.vec_stride << 4);
170	if ((env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR)
171	flags \|= (1 << 6);
172	if (env->vfp.xregs[ARM_VFP_FPEXC] & (1 << 30))
173	flags \|= (1 << 7);
174	cs_base = 0;
175	pc = env->regs[15];
176	#elif defined(TARGET_SPARC)
177	#ifdef TARGET_SPARC64
178	// Combined FPU enable bits . PRIV . DMMU enabled . IMMU enabled
179	flags = (((env->pstate & PS_PEF) >> 1) \| ((env->fprs & FPRS_FEF) << 2))
180	\| (env->pstate & PS_PRIV) \| ((env->lsu & (DMMU_E \| IMMU_E)) >> 2);
181	#else
182	// FPU enable . MMU enabled . MMU no-fault . Supervisor
183	flags = (env->psref << 3) \| ((env->mmuregs[0] & (MMU_E \| MMU_NF)) << 1)
184	\| env->psrs;
185	#endif
186	cs_base = env->npc;
187	pc = env->pc;
188	#elif defined(TARGET_PPC)
189	flags = (msr_pr << MSR_PR) \| (msr_fp << MSR_FP) \|
190	(msr_se << MSR_SE) \| (msr_le << MSR_LE);
191	cs_base = 0;
192	pc = env->nip;
193	#elif defined(TARGET_MIPS)
194	flags = env->hflags & (MIPS_HFLAG_TMASK \| MIPS_HFLAG_BMASK);
195	cs_base = 0;
196	pc = env->PC;
197	#elif defined(TARGET_M68K)
198	flags = env->fpcr & M68K_FPCR_PREC;
199	cs_base = 0;
200	pc = env->pc;
201	#elif defined(TARGET_SH4)
202	flags = env->sr & (SR_MD \| SR_RB);
203	cs_base = 0; /* XXXXX */
204	pc = env->pc;
205	#else
206	#error unsupported CPU
207	#endif
208	tb = env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)];
209	if (__builtin_expect(!tb \|\| tb->pc != pc \|\| tb->cs_base != cs_base \|\|
210	tb->flags != flags, 0)) {
211	tb = tb_find_slow(pc, cs_base, flags);
212	/* Note: we do it here to avoid a gcc bug on Mac OS X when
213	doing it in tb_find_slow */
214	if (tb_invalidated_flag) {
215	/* as some TB could have been invalidated because
216	of memory exceptions while generating the code, we
217	must recompute the hash index here */
218	T0 = 0;
219	}
220	}
221	return tb;
222	}
223
224
225	/* main execution loop */
226
227	#ifdef VBOX
228
229	int cpu_exec(CPUState *env1)
230	{
231	#define DECLARE_HOST_REGS 1
232	#include "hostregs_helper.h"
233	int ret, interrupt_request;
234	void (*gen_func)(void);
235	TranslationBlock *tb;
236	uint8_t *tc_ptr;
237
238	#if defined(TARGET_I386)
239	/* handle exit of HALTED state */
240	if (env1->hflags & HF_HALTED_MASK) {
241	/* disable halt condition */
242	if ((env1->interrupt_request & CPU_INTERRUPT_HARD) &&
243	(env1->eflags & IF_MASK)) {
244	env1->hflags &= ~HF_HALTED_MASK;
245	} else {
246	return EXCP_HALTED;
247	}
248	}
249	#elif defined(TARGET_PPC)
250	if (env1->halted) {
251	if (env1->msr[MSR_EE] &&
252	(env1->interrupt_request &
253	(CPU_INTERRUPT_HARD \| CPU_INTERRUPT_TIMER))) {
254	env1->halted = 0;
255	} else {
256	return EXCP_HALTED;
257	}
258	}
259	#elif defined(TARGET_SPARC)
260	if (env1->halted) {
261	if ((env1->interrupt_request & CPU_INTERRUPT_HARD) &&
262	(env1->psret != 0)) {
263	env1->halted = 0;
264	} else {
265	return EXCP_HALTED;
266	}
267	}
268	#elif defined(TARGET_ARM)
269	if (env1->halted) {
270	/* An interrupt wakes the CPU even if the I and F CPSR bits are
271	set. */
272	if (env1->interrupt_request
273	& (CPU_INTERRUPT_FIQ \| CPU_INTERRUPT_HARD)) {
274	env1->halted = 0;
275	} else {
276	return EXCP_HALTED;
277	}
278	}
279	#elif defined(TARGET_MIPS)
280	if (env1->halted) {
281	if (env1->interrupt_request &
282	(CPU_INTERRUPT_HARD \| CPU_INTERRUPT_TIMER)) {
283	env1->halted = 0;
284	} else {
285	return EXCP_HALTED;
286	}
287	}
288	#endif
289
290	cpu_single_env = env1;
291
292	/* first we save global registers */
293	#define SAVE_HOST_REGS 1
294	#include "hostregs_helper.h"
295	env = env1;
296	#if defined(__sparc__) && !defined(HOST_SOLARIS)
297	/* we also save i7 because longjmp may not restore it */
298	asm volatile ("mov %%i7, %0" : "=r" (saved_i7));
299	#endif
300
301	#if defined(TARGET_I386)
302
303	env_to_regs();
304	/* put eflags in CPU temporary format */
305	CC_SRC = env->eflags & (CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
306	DF = 1 - (2 * ((env->eflags >> 10) & 1));
307	CC_OP = CC_OP_EFLAGS;
308	env->eflags &= ~(DF_MASK \| CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
309	#elif defined(TARGET_ARM)
310	#elif defined(TARGET_SPARC)
311	#if defined(reg_REGWPTR)
312	saved_regwptr = REGWPTR;
313	#endif
314	#elif defined(TARGET_PPC)
315	#elif defined(TARGET_MIPS)
316	#elif defined(TARGET_SH4)
317	/* XXXXX */
318	#else
319	#error unsupported target CPU
320	#endif
321	#ifndef VBOX /* VBOX: We need to raise traps and suchlike from the outside. */
322	env->exception_index = -1;
323	#endif
324
325	/* prepare setjmp context for exception handling */
326	for(;;) {
327	if (setjmp(env->jmp_env) == 0)
328	{
329	env->current_tb = NULL;
330	VMMR3Unlock(env->pVM);
331	VMMR3Lock(env->pVM);
332
333	/*
334	* Check for fatal errors first
335	*/
336	if (env->interrupt_request & CPU_INTERRUPT_RC) {
337	env->exception_index = EXCP_RC;
338	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_RC);
339	ret = env->exception_index;
340	cpu_loop_exit();
341	}
342
343	/* if an exception is pending, we execute it here */
344	if (env->exception_index >= 0) {
345	Assert(!env->user_mode_only);
346	if (env->exception_index >= EXCP_INTERRUPT) {
347	/* exit request from the cpu execution loop */
348	ret = env->exception_index;
349	break;
350	} else {
351	/* simulate a real cpu exception. On i386, it can
352	trigger new exceptions, but we do not handle
353	double or triple faults yet. */
354	RAWEx_ProfileStart(env, STATS_IRQ_HANDLING);
355	Log(("do_interrupt %d %d %08x\n", env->exception_index, env->exception_is_int, env->exception_next_eip));
356	do_interrupt(env->exception_index,
357	env->exception_is_int,
358	env->error_code,
359	env->exception_next_eip, 0);
360	RAWEx_ProfileStop(env, STATS_IRQ_HANDLING);
361	}
362	env->exception_index = -1;
363	}
364
365	T0 = 0; /* force lookup of first TB */
366	for(;;)
367	{
368	interrupt_request = env->interrupt_request;
369	if (__builtin_expect(interrupt_request, 0))
370	{
371	/* Single instruction exec request, we execute it and return (one way or the other).
372	The caller will always reschedule after doing this operation! */
373	if (interrupt_request & CPU_INTERRUPT_SINGLE_INSTR)
374	{
375	/* not in flight are we? (if we are, we trapped) */
376	if (!(env->interrupt_request & CPU_INTERRUPT_SINGLE_INSTR_IN_FLIGHT))
377	{
378	ASMAtomicOrS32(&env->interrupt_request, CPU_INTERRUPT_SINGLE_INSTR_IN_FLIGHT);
379	env->exception_index = EXCP_SINGLE_INSTR;
380	if (emulate_single_instr(env) == -1)
381	AssertMsgFailed(("REM: emulate_single_instr failed for EIP=%08x!!\n", env->eip));
382
383	/* When we receive an external interrupt during execution of this single
384	instruction, then we should stay here. We will leave when we're ready
385	for raw-mode or when interrupted by pending EMT requests. */
386	interrupt_request = env->interrupt_request; /* reload this! */
387	if ( !(interrupt_request & CPU_INTERRUPT_HARD)
388	\|\| !(env->eflags & IF_MASK)
389	\|\| (env->hflags & HF_INHIBIT_IRQ_MASK)
390	\|\| (env->state & CPU_RAW_HWACC)
391	)
392	{
393	env->exception_index = ret = EXCP_SINGLE_INSTR;
394	cpu_loop_exit();
395	}
396	}
397	/* Clear CPU_INTERRUPT_SINGLE_INSTR and leave CPU_INTERRUPT_SINGLE_INSTR_IN_FLIGHT set. */
398	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_SINGLE_INSTR);
399	}
400
401	RAWEx_ProfileStart(env, STATS_IRQ_HANDLING);
402	if ((interrupt_request & CPU_INTERRUPT_SMI) &&
403	!(env->hflags & HF_SMM_MASK)) {
404	env->interrupt_request &= ~CPU_INTERRUPT_SMI;
405	do_smm_enter();
406	T0 = 0;
407	}
408	else if ((interrupt_request & CPU_INTERRUPT_HARD) &&
409	(env->eflags & IF_MASK) &&
410	!(env->hflags & HF_INHIBIT_IRQ_MASK))
411	{
412	/* if hardware interrupt pending, we execute it */
413	int intno;
414	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_HARD);
415	intno = cpu_get_pic_interrupt(env);
416	if (intno >= 0)
417	{
418	Log(("do_interrupt %d\n", intno));
419	do_interrupt(intno, 0, 0, 0, 1);
420	}
421	/* ensure that no TB jump will be modified as
422	the program flow was changed */
423	T0 = 0;
424	}
425	if (env->interrupt_request & CPU_INTERRUPT_EXITTB)
426	{
427	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_EXITTB);
428	/* ensure that no TB jump will be modified as
429	the program flow was changed */
430	T0 = 0;
431	}
432	RAWEx_ProfileStop(env, STATS_IRQ_HANDLING);
433	if (interrupt_request & CPU_INTERRUPT_EXIT)
434	{
435	env->exception_index = EXCP_INTERRUPT;
436	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_EXIT);
437	ret = env->exception_index;
438	cpu_loop_exit();
439	}
440	if (interrupt_request & CPU_INTERRUPT_RC)
441	{
442	env->exception_index = EXCP_RC;
443	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_RC);
444	ret = env->exception_index;
445	cpu_loop_exit();
446	}
447	}
448
449	/*
450	* Check if we the CPU state allows us to execute the code in raw-mode.
451	*/
452	RAWEx_ProfileStart(env, STATS_RAW_CHECK);
453	if (remR3CanExecuteRaw(env,
454	env->eip + env->segs[R_CS].base,
455	env->hflags \| (env->eflags & (IOPL_MASK \| TF_MASK \| VM_MASK)),
456	&env->exception_index))
457	{
458	RAWEx_ProfileStop(env, STATS_RAW_CHECK);
459	ret = env->exception_index;
460	cpu_loop_exit();
461	}
462	RAWEx_ProfileStop(env, STATS_RAW_CHECK);
463
464	RAWEx_ProfileStart(env, STATS_TLB_LOOKUP);
465	tb = tb_find_fast();
466
467	/* see if we can patch the calling TB. When the TB
468	spans two pages, we cannot safely do a direct
469	jump. */
470	if (T0 != 0
471	&& !(tb->cflags & CF_RAW_MODE)
472	&& tb->page_addr[1] == -1)
473	{
474	spin_lock(&tb_lock);
475	tb_add_jump((TranslationBlock *)(long)(T0 & ~3), T0 & 3, tb);
476	spin_unlock(&tb_lock);
477	}
478	tc_ptr = tb->tc_ptr;
479	env->current_tb = tb;
480	/* execute the generated code */
481	gen_func = (void *)tc_ptr;
482	RAWEx_ProfileStop(env, STATS_TLB_LOOKUP);
483
484	#if defined(DEBUG) && defined(VBOX) && !defined(DEBUG_dmik)
485	#if !defined(DEBUG_bird)
486	if (((env->hflags >> HF_CPL_SHIFT) & 3) == 0 && (env->hflags & HF_PE_MASK) && (env->cr[0] & CR0_PG_MASK))
487	{
488	if(!(env->state & CPU_EMULATE_SINGLE_STEP))
489	{
490	Log(("EMR0: %VGv ESP=%VGv IF=%d TF=%d CPL=%d\n", env->eip, ESP, (env->eflags & IF_MASK) ? 1 : 0, (env->eflags & TF_MASK) ? 1 : 0, (env->hflags >> HF_CPL_SHIFT) & 3));
491	}
492	}
493	else
494	if (((env->hflags >> HF_CPL_SHIFT) & 3) == 3 && (env->hflags & HF_PE_MASK) && (env->cr[0] & CR0_PG_MASK))
495	{
496	if(!(env->state & CPU_EMULATE_SINGLE_STEP))
497	{
498	if(env->eflags & VM_MASK)
499	{
500	Log(("EMV86: %04X:%04X IF=%d TF=%d CPL=%d CR0=%08X\n", env->segs[R_CS].selector, env->eip, (env->eflags & IF_MASK) ? 1 : 0, (env->eflags & TF_MASK) ? 1 : 0, (env->hflags >> HF_CPL_SHIFT) & 3, env->cr[0]));
501	}
502	else
503	{
504	Log(("EMR3: %VGv ESP=%VGv IF=%d TF=%d CPL=%d IOPL=%d CR0=%08X\n", env->eip, ESP, (env->eflags & IF_MASK) ? 1 : 0, (env->eflags & TF_MASK) ? 1 : 0, (env->hflags >> HF_CPL_SHIFT) & 3, ((env->eflags >> IOPL_SHIFT) & 3), env->cr[0]));
505	}
506	}
507	}
508	else
509	{
510	/* Seriously slows down realmode booting. */
511	LogFlow(("EMRM: %04X:%08X SS:ESP=%04X:%08X IF=%d TF=%d CPL=%d PE=%d PG=%d\n", env->segs[R_CS].selector, env->eip, env->segs[R_SS].selector, ESP, (env->eflags & IF_MASK) ? 1 : 0, (env->eflags & TF_MASK) ? 1 : 0, (env->hflags >> HF_CPL_SHIFT) & 3, env->cr[0] & X86_CR0_PE, env->cr[0] & X86_CR0_PG));
512	}
513	#endif /* !DEBUG_bird */
514	if(env->state & CPU_EMULATE_SINGLE_STEP)
515	{
516	#ifdef DEBUG_bird
517	static int s_cTimes = 0;
518	if (s_cTimes++ > 1000000)
519	{
520	RTLogPrintf("Enough stepping!\n");
521	#if 0
522	env->exception_index = EXCP_DEBUG;
523	ret = env->exception_index;
524	cpu_loop_exit();
525	#else
526	env->state &= ~CPU_EMULATE_SINGLE_STEP;
527	#endif
528	}
529	#endif
530	TMCpuTickPause(env->pVM);
531	remR3DisasInstr(env, -1, NULL);
532	TMCpuTickResume(env->pVM);
533	if(emulate_single_instr(env) == -1)
534	{
535	Log(("emulate_single_instr failed for EIP=%08X!!\n", env->eip));
536	}
537	}
538	else
539	{
540	RAWEx_ProfileStart(env, STATS_QEMU_RUN_EMULATED_CODE);
541	gen_func();
542	RAWEx_ProfileStop(env, STATS_QEMU_RUN_EMULATED_CODE);
543	}
544	#else /* !DEBUG \|\| !VBOX \|\| DEBUG_dmik */
545
546	RAWEx_ProfileStart(env, STATS_QEMU_RUN_EMULATED_CODE);
547	gen_func();
548	RAWEx_ProfileStop(env, STATS_QEMU_RUN_EMULATED_CODE);
549
550	#endif /* !DEBUG \|\| !VBOX \|\| DEBUG_dmik */
551	env->current_tb = NULL;
552	/* reset soft MMU for next block (it can currently
553	only be set by a memory fault) */
554	#if defined(TARGET_I386) && !defined(CONFIG_SOFTMMU)
555	if (env->hflags & HF_SOFTMMU_MASK) {
556	env->hflags &= ~HF_SOFTMMU_MASK;
557	/* do not allow linking to another block */
558	T0 = 0;
559	}
560	#endif
561	}
562	} else {
563	env_to_regs();
564	}
565	#ifdef VBOX_HIGH_RES_TIMERS_HACK
566	/* NULL the current_tb here so cpu_interrupt() doesn't do
567	anything unnecessary (like crashing during emulate single instruction). */
568	env->current_tb = NULL;
569	TMTimerPoll(env1->pVM);
570	#endif
571	} /* for(;;) */
572
573	#if defined(TARGET_I386)
574	/* restore flags in standard format */
575	env->eflags = env->eflags \| cc_table[CC_OP].compute_all() \| (DF & DF_MASK);
576	#else
577	#error unsupported target CPU
578	#endif
579	#include "hostregs_helper.h"
580	return ret;
581	}
582
583
584	#else /* !VBOX */
585
586
587	int cpu_exec(CPUState *env1)
588	{
589	#define DECLARE_HOST_REGS 1
590	#include "hostregs_helper.h"
591	#if defined(__sparc__) && !defined(HOST_SOLARIS)
592	int saved_i7;
593	target_ulong tmp_T0;
594	#endif
595	int ret, interrupt_request;
596	void (*gen_func)(void);
597	TranslationBlock *tb;
598	uint8_t *tc_ptr;
599
600	#if defined(TARGET_I386)
601	/* handle exit of HALTED state */
602	if (env1->hflags & HF_HALTED_MASK) {
603	/* disable halt condition */
604	if ((env1->interrupt_request & CPU_INTERRUPT_HARD) &&
605	(env1->eflags & IF_MASK)) {
606	env1->hflags &= ~HF_HALTED_MASK;
607	} else {
608	return EXCP_HALTED;
609	}
610	}
611	#elif defined(TARGET_PPC)
612	if (env1->halted) {
613	if (env1->msr[MSR_EE] &&
614	(env1->interrupt_request &
615	(CPU_INTERRUPT_HARD \| CPU_INTERRUPT_TIMER))) {
616	env1->halted = 0;
617	} else {
618	return EXCP_HALTED;
619	}
620	}
621	#elif defined(TARGET_SPARC)
622	if (env1->halted) {
623	if ((env1->interrupt_request & CPU_INTERRUPT_HARD) &&
624	(env1->psret != 0)) {
625	env1->halted = 0;
626	} else {
627	return EXCP_HALTED;
628	}
629	}
630	#elif defined(TARGET_ARM)
631	if (env1->halted) {
632	/* An interrupt wakes the CPU even if the I and F CPSR bits are
633	set. */
634	if (env1->interrupt_request
635	& (CPU_INTERRUPT_FIQ \| CPU_INTERRUPT_HARD)) {
636	env1->halted = 0;
637	} else {
638	return EXCP_HALTED;
639	}
640	}
641	#elif defined(TARGET_MIPS)
642	if (env1->halted) {
643	if (env1->interrupt_request &
644	(CPU_INTERRUPT_HARD \| CPU_INTERRUPT_TIMER)) {
645	env1->halted = 0;
646	} else {
647	return EXCP_HALTED;
648	}
649	}
650	#endif
651
652	cpu_single_env = env1;
653
654	/* first we save global registers */
655	#define SAVE_HOST_REGS 1
656	#include "hostregs_helper.h"
657	env = env1;
658	#if defined(__sparc__) && !defined(HOST_SOLARIS)
659	/* we also save i7 because longjmp may not restore it */
660	asm volatile ("mov %%i7, %0" : "=r" (saved_i7));
661	#endif
662
663	#if defined(TARGET_I386)
664	env_to_regs();
665	/* put eflags in CPU temporary format */
666	CC_SRC = env->eflags & (CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
667	DF = 1 - (2 * ((env->eflags >> 10) & 1));
668	CC_OP = CC_OP_EFLAGS;
669	env->eflags &= ~(DF_MASK \| CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
670	#elif defined(TARGET_ARM)
671	#elif defined(TARGET_SPARC)
672	#if defined(reg_REGWPTR)
673	saved_regwptr = REGWPTR;
674	#endif
675	#elif defined(TARGET_PPC)
676	#elif defined(TARGET_M68K)
677	env->cc_op = CC_OP_FLAGS;
678	env->cc_dest = env->sr & 0xf;
679	env->cc_x = (env->sr >> 4) & 1;
680	#elif defined(TARGET_MIPS)
681	#elif defined(TARGET_SH4)
682	/* XXXXX */
683	#else
684	#error unsupported target CPU
685	#endif
686	#ifndef VBOX /* VBOX: We need to raise traps and suchlike from the outside. */
687	env->exception_index = -1;
688	#endif
689
690	/* prepare setjmp context for exception handling */
691	for(;;) {
692	if (setjmp(env->jmp_env) == 0) {
693	env->current_tb = NULL;
694	#ifdef VBOX
695	VMMR3Unlock(env->pVM);
696	VMMR3Lock(env->pVM);
697
698	/* Check for high priority requests first (like fatal
699	errors). */
700	if (env->interrupt_request & CPU_INTERRUPT_RC) {
701	env->exception_index = EXCP_RC;
702	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_RC);
703	ret = env->exception_index;
704	cpu_loop_exit();
705	}
706	#endif /* VBOX */
707
708
709	/* if an exception is pending, we execute it here */
710	if (env->exception_index >= 0) {
711	if (env->exception_index >= EXCP_INTERRUPT) {
712	/* exit request from the cpu execution loop */
713	ret = env->exception_index;
714	break;
715	} else if (env->user_mode_only) {
716	/* if user mode only, we simulate a fake exception
717	which will be handled outside the cpu execution
718	loop */
719	#if defined(TARGET_I386)
720	do_interrupt_user(env->exception_index,
721	env->exception_is_int,
722	env->error_code,
723	env->exception_next_eip);
724	#endif
725	ret = env->exception_index;
726	break;
727	} else {
728	#if defined(TARGET_I386)
729	/* simulate a real cpu exception. On i386, it can
730	trigger new exceptions, but we do not handle
731	double or triple faults yet. */
732	do_interrupt(env->exception_index,
733	env->exception_is_int,
734	env->error_code,
735	env->exception_next_eip, 0);
736	#elif defined(TARGET_PPC)
737	do_interrupt(env);
738	#elif defined(TARGET_MIPS)
739	do_interrupt(env);
740	#elif defined(TARGET_SPARC)
741	do_interrupt(env->exception_index);
742	#elif defined(TARGET_ARM)
743	do_interrupt(env);
744	#elif defined(TARGET_SH4)
745	do_interrupt(env);
746	#endif
747	}
748	env->exception_index = -1;
749	}
750	#ifdef USE_KQEMU
751	if (kqemu_is_ok(env) && env->interrupt_request == 0) {
752	int ret;
753	env->eflags = env->eflags \| cc_table[CC_OP].compute_all() \| (DF & DF_MASK);
754	ret = kqemu_cpu_exec(env);
755	/* put eflags in CPU temporary format */
756	CC_SRC = env->eflags & (CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
757	DF = 1 - (2 * ((env->eflags >> 10) & 1));
758	CC_OP = CC_OP_EFLAGS;
759	env->eflags &= ~(DF_MASK \| CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
760	if (ret == 1) {
761	/* exception */
762	longjmp(env->jmp_env, 1);
763	} else if (ret == 2) {
764	/* softmmu execution needed */
765	} else {
766	if (env->interrupt_request != 0) {
767	/* hardware interrupt will be executed just after */
768	} else {
769	/* otherwise, we restart */
770	longjmp(env->jmp_env, 1);
771	}
772	}
773	}
774	#endif
775
776	T0 = 0; /* force lookup of first TB */
777	for(;;) {
778	#if defined(__sparc__) && !defined(HOST_SOLARIS)
779	/* g1 can be modified by some libc? functions */
780	tmp_T0 = T0;
781	#endif
782	interrupt_request = env->interrupt_request;
783	if (__builtin_expect(interrupt_request, 0)) {
784	#ifdef VBOX
785	/* Single instruction exec request, we execute it and return (one way or the other).
786	The caller will always reschedule after doing this operation! */
787	if (interrupt_request & CPU_INTERRUPT_SINGLE_INSTR)
788	{
789	/* not in flight are we? */
790	if (!(env->interrupt_request & CPU_INTERRUPT_SINGLE_INSTR_IN_FLIGHT))
791	{
792	ASMAtomicOrS32(&env->interrupt_request, CPU_INTERRUPT_SINGLE_INSTR_IN_FLIGHT);
793	env->exception_index = EXCP_SINGLE_INSTR;
794	if (emulate_single_instr(env) == -1)
795	AssertMsgFailed(("REM: emulate_single_instr failed for EIP=%08x!!\n", env->eip));
796
797	/* When we receive an external interrupt during execution of this single
798	instruction, then we should stay here. We will leave when we're ready
799	for raw-mode or when interrupted by pending EMT requests. */
800	interrupt_request = env->interrupt_request; /* reload this! */
801	if ( !(interrupt_request & CPU_INTERRUPT_HARD)
802	\|\| !(env->eflags & IF_MASK)
803	\|\| (env->hflags & HF_INHIBIT_IRQ_MASK)
804	)
805	{
806	env->exception_index = ret = EXCP_SINGLE_INSTR;
807	cpu_loop_exit();
808	}
809	}
810	env->exception_index = EXCP_SINGLE_INSTR;
811	cpu_loop_exit();
812	}
813
814	RAWEx_ProfileStart(env, STATS_IRQ_HANDLING);
815	#endif /* VBOX */
816	#if defined(TARGET_I386)
817	if ((interrupt_request & CPU_INTERRUPT_SMI) &&
818	!(env->hflags & HF_SMM_MASK)) {
819	env->interrupt_request &= ~CPU_INTERRUPT_SMI;
820	do_smm_enter();
821	#if defined(__sparc__) && !defined(HOST_SOLARIS)
822	tmp_T0 = 0;
823	#else
824	T0 = 0;
825	#endif
826	} else if ((interrupt_request & CPU_INTERRUPT_HARD) &&
827	(env->eflags & IF_MASK) &&
828	!(env->hflags & HF_INHIBIT_IRQ_MASK)) {
829	int intno;
830	#if defined(VBOX)
831	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_HARD);
832	#else
833	env->interrupt_request &= ~CPU_INTERRUPT_HARD;
834	#endif
835	intno = cpu_get_pic_interrupt(env);
836	if (loglevel & CPU_LOG_TB_IN_ASM) {
837	fprintf(logfile, "Servicing hardware INT=0x%02x\n", intno);
838	}
839	#if defined(VBOX)
840	if (intno >= 0)
841	#endif
842	do_interrupt(intno, 0, 0, 0, 1);
843	/* ensure that no TB jump will be modified as
844	the program flow was changed */
845	#if defined(__sparc__) && !defined(HOST_SOLARIS)
846	tmp_T0 = 0;
847	#else
848	T0 = 0;
849	#endif
850	}
851	#elif defined(TARGET_PPC)
852	#if 0
853	if ((interrupt_request & CPU_INTERRUPT_RESET)) {
854	cpu_ppc_reset(env);
855	}
856	#endif
857	if (msr_ee != 0) {
858	if ((interrupt_request & CPU_INTERRUPT_HARD)) {
859	/* Raise it */
860	env->exception_index = EXCP_EXTERNAL;
861	env->error_code = 0;
862	do_interrupt(env);
863	env->interrupt_request &= ~CPU_INTERRUPT_HARD;
864	#if defined(__sparc__) && !defined(HOST_SOLARIS)
865	tmp_T0 = 0;
866	#else
867	T0 = 0;
868	#endif
869	} else if ((interrupt_request & CPU_INTERRUPT_TIMER)) {
870	/* Raise it */
871	env->exception_index = EXCP_DECR;
872	env->error_code = 0;
873	do_interrupt(env);
874	env->interrupt_request &= ~CPU_INTERRUPT_TIMER;
875	#if defined(__sparc__) && !defined(HOST_SOLARIS)
876	tmp_T0 = 0;
877	#else
878	T0 = 0;
879	#endif
880	}
881	}
882	#elif defined(TARGET_MIPS)
883	if ((interrupt_request & CPU_INTERRUPT_HARD) &&
884	(env->CP0_Status & (1 << CP0St_IE)) &&
885	(env->CP0_Status & env->CP0_Cause & 0x0000FF00) &&
886	!(env->hflags & MIPS_HFLAG_EXL) &&
887	!(env->hflags & MIPS_HFLAG_ERL) &&
888	!(env->hflags & MIPS_HFLAG_DM)) {
889	/* Raise it */
890	env->exception_index = EXCP_EXT_INTERRUPT;
891	env->error_code = 0;
892	do_interrupt(env);
893	#if defined(__sparc__) && !defined(HOST_SOLARIS)
894	tmp_T0 = 0;
895	#else
896	T0 = 0;
897	#endif
898	}
899	#elif defined(TARGET_SPARC)
900	if ((interrupt_request & CPU_INTERRUPT_HARD) &&
901	(env->psret != 0)) {
902	int pil = env->interrupt_index & 15;
903	int type = env->interrupt_index & 0xf0;
904
905	if (((type == TT_EXTINT) &&
906	(pil == 15 \|\| pil > env->psrpil)) \|\|
907	type != TT_EXTINT) {
908	env->interrupt_request &= ~CPU_INTERRUPT_HARD;
909	do_interrupt(env->interrupt_index);
910	env->interrupt_index = 0;
911	#if defined(__sparc__) && !defined(HOST_SOLARIS)
912	tmp_T0 = 0;
913	#else
914	T0 = 0;
915	#endif
916	}
917	} else if (interrupt_request & CPU_INTERRUPT_TIMER) {
918	//do_interrupt(0, 0, 0, 0, 0);
919	env->interrupt_request &= ~CPU_INTERRUPT_TIMER;
920	} else if (interrupt_request & CPU_INTERRUPT_HALT) {
921	env->interrupt_request &= ~CPU_INTERRUPT_HALT;
922	env->halted = 1;
923	env->exception_index = EXCP_HLT;
924	cpu_loop_exit();
925	}
926	#elif defined(TARGET_ARM)
927	if (interrupt_request & CPU_INTERRUPT_FIQ
928	&& !(env->uncached_cpsr & CPSR_F)) {
929	env->exception_index = EXCP_FIQ;
930	do_interrupt(env);
931	}
932	if (interrupt_request & CPU_INTERRUPT_HARD
933	&& !(env->uncached_cpsr & CPSR_I)) {
934	env->exception_index = EXCP_IRQ;
935	do_interrupt(env);
936	}
937	#elif defined(TARGET_SH4)
938	/* XXXXX */
939	#endif
940	/* Don't use the cached interupt_request value,
941	do_interrupt may have updated the EXITTB flag. */
942	if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
943	#if defined(VBOX)
944	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_EXITTB);
945	#else
946	env->interrupt_request &= ~CPU_INTERRUPT_EXITTB;
947	#endif
948	/* ensure that no TB jump will be modified as
949	the program flow was changed */
950	#if defined(__sparc__) && !defined(HOST_SOLARIS)
951	tmp_T0 = 0;
952	#else
953	T0 = 0;
954	#endif
955	}
956	#ifdef VBOX
957	RAWEx_ProfileStop(env, STATS_IRQ_HANDLING);
958	#endif
959	if (interrupt_request & CPU_INTERRUPT_EXIT) {
960	#if defined(VBOX)
961	env->exception_index = EXCP_INTERRUPT;
962	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_EXIT);
963	#else
964	env->interrupt_request &= ~CPU_INTERRUPT_EXIT;
965	env->exception_index = EXCP_INTERRUPT;
966	#endif
967	cpu_loop_exit();
968	}
969	#if defined(VBOX)
970	if (interrupt_request & CPU_INTERRUPT_RC) {
971	env->exception_index = EXCP_RC;
972	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_RC);
973	cpu_loop_exit();
974	}
975	#endif
976	}
977	#ifdef DEBUG_EXEC
978	if ((loglevel & CPU_LOG_TB_CPU)) {
979	#if defined(TARGET_I386)
980	/* restore flags in standard format */
981	#ifdef reg_EAX
982	env->regs[R_EAX] = EAX;
983	#endif
984	#ifdef reg_EBX
985	env->regs[R_EBX] = EBX;
986	#endif
987	#ifdef reg_ECX
988	env->regs[R_ECX] = ECX;
989	#endif
990	#ifdef reg_EDX
991	env->regs[R_EDX] = EDX;
992	#endif
993	#ifdef reg_ESI
994	env->regs[R_ESI] = ESI;
995	#endif
996	#ifdef reg_EDI
997	env->regs[R_EDI] = EDI;
998	#endif
999	#ifdef reg_EBP
1000	env->regs[R_EBP] = EBP;
1001	#endif
1002	#ifdef reg_ESP
1003	env->regs[R_ESP] = ESP;
1004	#endif
1005	env->eflags = env->eflags \| cc_table[CC_OP].compute_all() \| (DF & DF_MASK);
1006	cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP);
1007	env->eflags &= ~(DF_MASK \| CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
1008	#elif defined(TARGET_ARM)
1009	cpu_dump_state(env, logfile, fprintf, 0);
1010	#elif defined(TARGET_SPARC)
1011	REGWPTR = env->regbase + (env->cwp * 16);
1012	env->regwptr = REGWPTR;
1013	cpu_dump_state(env, logfile, fprintf, 0);
1014	#elif defined(TARGET_PPC)
1015	cpu_dump_state(env, logfile, fprintf, 0);
1016	#elif defined(TARGET_M68K)
1017	cpu_m68k_flush_flags(env, env->cc_op);
1018	env->cc_op = CC_OP_FLAGS;
1019	env->sr = (env->sr & 0xffe0)
1020	\| env->cc_dest \| (env->cc_x << 4);
1021	cpu_dump_state(env, logfile, fprintf, 0);
1022	#elif defined(TARGET_MIPS)
1023	cpu_dump_state(env, logfile, fprintf, 0);
1024	#elif defined(TARGET_SH4)
1025	cpu_dump_state(env, logfile, fprintf, 0);
1026	#else
1027	#error unsupported target CPU
1028	#endif
1029	}
1030	#endif
1031	#ifdef VBOX
1032	/*
1033	* Check if we the CPU state allows us to execute the code in raw-mode.
1034	*/
1035	RAWEx_ProfileStart(env, STATS_RAW_CHECK);
1036	if (remR3CanExecuteRaw(env,
1037	env->eip + env->segs[R_CS].base,
1038	env->hflags \| (env->eflags & (IOPL_MASK \| TF_MASK \| VM_MASK))
1039	flags, &env->exception_index))
1040	{
1041	RAWEx_ProfileStop(env, STATS_RAW_CHECK);
1042	ret = env->exception_index;
1043	cpu_loop_exit();
1044	}
1045	RAWEx_ProfileStop(env, STATS_RAW_CHECK);
1046	#endif /* VBOX */
1047	tb = tb_find_fast();
1048	#ifdef DEBUG_EXEC
1049	if ((loglevel & CPU_LOG_EXEC)) {
1050	fprintf(logfile, "Trace 0x%08lx [" TARGET_FMT_lx "] %s\n",
1051	(long)tb->tc_ptr, tb->pc,
1052	lookup_symbol(tb->pc));
1053	}
1054	#endif
1055	#if defined(__sparc__) && !defined(HOST_SOLARIS)
1056	T0 = tmp_T0;
1057	#endif
1058	/* see if we can patch the calling TB. When the TB
1059	spans two pages, we cannot safely do a direct
1060	jump. */
1061	{
1062	if (T0 != 0 &&
1063	#if USE_KQEMU
1064	(env->kqemu_enabled != 2) &&
1065	#endif
1066	#ifdef VBOX
1067	!(tb->cflags & CF_RAW_MODE) &&
1068	#endif
1069	tb->page_addr[1] == -1
1070	#if defined(TARGET_I386) && defined(USE_CODE_COPY)
1071	&& (tb->cflags & CF_CODE_COPY) ==
1072	(((TranslationBlock *)(T0 & ~3))->cflags & CF_CODE_COPY)
1073	#endif
1074	) {
1075	spin_lock(&tb_lock);
1076	tb_add_jump((TranslationBlock *)(long)(T0 & ~3), T0 & 3, tb);
1077	#if defined(USE_CODE_COPY)
1078	/* propagates the FP use info */
1079	((TranslationBlock *)(T0 & ~3))->cflags \|=
1080	(tb->cflags & CF_FP_USED);
1081	#endif
1082	spin_unlock(&tb_lock);
1083	}
1084	}
1085	tc_ptr = tb->tc_ptr;
1086	env->current_tb = tb;
1087	/* execute the generated code */
1088	gen_func = (void *)tc_ptr;
1089	#if defined(__sparc__)
1090	__asm__ __volatile__("call %0\n\t"
1091	"mov %%o7,%%i0"
1092	: /* no outputs */
1093	: "r" (gen_func)
1094	: "i0", "i1", "i2", "i3", "i4", "i5",
1095	"l0", "l1", "l2", "l3", "l4", "l5",
1096	"l6", "l7");
1097	#elif defined(__arm__)
1098	asm volatile ("mov pc, %0\n\t"
1099	".global exec_loop\n\t"
1100	"exec_loop:\n\t"
1101	: /* no outputs */
1102	: "r" (gen_func)
1103	: "r1", "r2", "r3", "r8", "r9", "r10", "r12", "r14");
1104	#elif defined(TARGET_I386) && defined(USE_CODE_COPY)
1105	{
1106	if (!(tb->cflags & CF_CODE_COPY)) {
1107	if ((tb->cflags & CF_FP_USED) && env->native_fp_regs) {
1108	save_native_fp_state(env);
1109	}
1110	gen_func();
1111	} else {
1112	if ((tb->cflags & CF_FP_USED) && !env->native_fp_regs) {
1113	restore_native_fp_state(env);
1114	}
1115	/* we work with native eflags */
1116	CC_SRC = cc_table[CC_OP].compute_all();
1117	CC_OP = CC_OP_EFLAGS;
1118	asm(".globl exec_loop\n"
1119	"\n"
1120	"debug1:\n"
1121	" pushl %%ebp\n"
1122	" fs movl %10, %9\n"
1123	" fs movl %11, %%eax\n"
1124	" andl $0x400, %%eax\n"
1125	" fs orl %8, %%eax\n"
1126	" pushl %%eax\n"
1127	" popf\n"
1128	" fs movl %%esp, %12\n"
1129	" fs movl %0, %%eax\n"
1130	" fs movl %1, %%ecx\n"
1131	" fs movl %2, %%edx\n"
1132	" fs movl %3, %%ebx\n"
1133	" fs movl %4, %%esp\n"
1134	" fs movl %5, %%ebp\n"
1135	" fs movl %6, %%esi\n"
1136	" fs movl %7, %%edi\n"
1137	" fs jmp *%9\n"
1138	"exec_loop:\n"
1139	" fs movl %%esp, %4\n"
1140	" fs movl %12, %%esp\n"
1141	" fs movl %%eax, %0\n"
1142	" fs movl %%ecx, %1\n"
1143	" fs movl %%edx, %2\n"
1144	" fs movl %%ebx, %3\n"
1145	" fs movl %%ebp, %5\n"
1146	" fs movl %%esi, %6\n"
1147	" fs movl %%edi, %7\n"
1148	" pushf\n"
1149	" popl %%eax\n"
1150	" movl %%eax, %%ecx\n"
1151	" andl $0x400, %%ecx\n"
1152	" shrl $9, %%ecx\n"
1153	" andl $0x8d5, %%eax\n"
1154	" fs movl %%eax, %8\n"
1155	" movl $1, %%eax\n"
1156	" subl %%ecx, %%eax\n"
1157	" fs movl %%eax, %11\n"
1158	" fs movl %9, %%ebx\n" /* get T0 value */
1159	" popl %%ebp\n"
1160	:
1161	: "m" ((uint8_t )offsetof(CPUState, regs[0])),
1162	"m" ((uint8_t )offsetof(CPUState, regs[1])),
1163	"m" ((uint8_t )offsetof(CPUState, regs[2])),
1164	"m" ((uint8_t )offsetof(CPUState, regs[3])),
1165	"m" ((uint8_t )offsetof(CPUState, regs[4])),
1166	"m" ((uint8_t )offsetof(CPUState, regs[5])),
1167	"m" ((uint8_t )offsetof(CPUState, regs[6])),
1168	"m" ((uint8_t )offsetof(CPUState, regs[7])),
1169	"m" ((uint8_t )offsetof(CPUState, cc_src)),
1170	"m" ((uint8_t )offsetof(CPUState, tmp0)),
1171	"a" (gen_func),
1172	"m" ((uint8_t )offsetof(CPUState, df)),
1173	"m" ((uint8_t )offsetof(CPUState, saved_esp))
1174	: "%ecx", "%edx"
1175	);
1176	}
1177	}
1178	#elif defined(__ia64)
1179	struct fptr {
1180	void *ip;
1181	void *gp;
1182	} fp;
1183
1184	fp.ip = tc_ptr;
1185	fp.gp = code_gen_buffer + 2 * (1 << 20);
1186	((void ()(void)) &fp)();
1187	#else
1188	#if defined(DEBUG) && defined(VBOX) && !defined(DEBUG_dmik)
1189	#if !defined(DEBUG_bird)
1190	if (((env->hflags >> HF_CPL_SHIFT) & 3) == 0 && (env->hflags & HF_PE_MASK) && (env->cr[0] & CR0_PG_MASK))
1191	{
1192	if(!(env->state & CPU_EMULATE_SINGLE_STEP))
1193	{
1194	Log(("EMR0: %08X IF=%d TF=%d CPL=%d\n", env->eip, (env->eflags & IF_MASK) ? 1 : 0, (env->eflags & TF_MASK) ? 1 : 0, (env->hflags >> HF_CPL_SHIFT) & 3));
1195	}
1196	}
1197	else
1198	if (((env->hflags >> HF_CPL_SHIFT) & 3) == 3 && (env->hflags & HF_PE_MASK) && (env->cr[0] & CR0_PG_MASK))
1199	{
1200	if(!(env->state & CPU_EMULATE_SINGLE_STEP))
1201	{
1202	if(env->eflags & VM_MASK)
1203	{
1204	Log(("EMV86: %08X IF=%d TF=%d CPL=%d flags=%08X CR0=%08X\n", env->eip, (env->eflags & IF_MASK) ? 1 : 0, (env->eflags & TF_MASK) ? 1 : 0, (env->hflags >> HF_CPL_SHIFT) & 3, flags, env->cr[0]));
1205	}
1206	else
1207	{
1208	Log(("EMR3: %08X IF=%d TF=%d CPL=%d IOPL=%d flags=%08X CR0=%08X\n", env->eip, (env->eflags & IF_MASK) ? 1 : 0, (env->eflags & TF_MASK) ? 1 : 0, (env->hflags >> HF_CPL_SHIFT) & 3, ((env->eflags >> IOPL_SHIFT) & 3), flags, env->cr[0]));
1209	}
1210	}
1211	}
1212	#endif /* !DEBUG_bird */
1213	if(env->state & CPU_EMULATE_SINGLE_STEP)
1214	{
1215	#ifdef DEBUG_bird
1216	static int s_cTimes = 0;
1217	if (s_cTimes++ > 1000000) /* 1 million */
1218	{
1219	RTLogPrintf("Enough stepping!\n");
1220	#if 0
1221	env->exception_index = EXCP_DEBUG;
1222	cpu_loop_exit();
1223	#else
1224	env->state &= ~CPU_EMULATE_SINGLE_STEP;
1225	#endif
1226	}
1227	#endif
1228	TMCpuTickPause(env->pVM);
1229	remR3DisasInstr(env, -1, NULL);
1230	TMCpuTickResume(env->pVM);
1231	if(emulate_single_instr(env) == -1)
1232	{
1233	printf("emulate_single_instr failed for EIP=%08X!!\n", env->eip);
1234	}
1235	}
1236	else
1237	{
1238	RAWEx_ProfileStart(env, STATS_QEMU_RUN_EMULATED_CODE);
1239	gen_func();
1240	RAWEx_ProfileStop(env, STATS_QEMU_RUN_EMULATED_CODE);
1241	}
1242	#else /* !DEBUG \|\| !VBOX \|\| DEBUG_dmik */
1243
1244	#ifdef VBOX
1245	RAWEx_ProfileStart(env, STATS_QEMU_RUN_EMULATED_CODE);
1246	gen_func();
1247	RAWEx_ProfileStop(env, STATS_QEMU_RUN_EMULATED_CODE);
1248	#else /* !VBOX */
1249	gen_func();
1250	#endif /* !VBOX */
1251
1252	#endif /* !DEBUG \|\| !VBOX \|\| DEBUG_dmik */
1253	#endif
1254	env->current_tb = NULL;
1255	/* reset soft MMU for next block (it can currently
1256	only be set by a memory fault) */
1257	#if defined(TARGET_I386) && !defined(CONFIG_SOFTMMU)
1258	if (env->hflags & HF_SOFTMMU_MASK) {
1259	env->hflags &= ~HF_SOFTMMU_MASK;
1260	/* do not allow linking to another block */
1261	T0 = 0;
1262	}
1263	#endif
1264	#if defined(USE_KQEMU)
1265	#define MIN_CYCLE_BEFORE_SWITCH (100 * 1000)
1266	if (kqemu_is_ok(env) &&
1267	(cpu_get_time_fast() - env->last_io_time) >= MIN_CYCLE_BEFORE_SWITCH) {
1268	cpu_loop_exit();
1269	}
1270	#endif
1271	}
1272	} else {
1273	env_to_regs();
1274	}
1275	} /* for(;;) */
1276
1277
1278	#if defined(TARGET_I386)
1279	#if defined(USE_CODE_COPY)
1280	if (env->native_fp_regs) {
1281	save_native_fp_state(env);
1282	}
1283	#endif
1284	/* restore flags in standard format */
1285	env->eflags = env->eflags \| cc_table[CC_OP].compute_all() \| (DF & DF_MASK);
1286	#elif defined(TARGET_ARM)
1287	/* XXX: Save/restore host fpu exception state?. */
1288	#elif defined(TARGET_SPARC)
1289	#if defined(reg_REGWPTR)
1290	REGWPTR = saved_regwptr;
1291	#endif
1292	#elif defined(TARGET_PPC)
1293	#elif defined(TARGET_M68K)
1294	cpu_m68k_flush_flags(env, env->cc_op);
1295	env->cc_op = CC_OP_FLAGS;
1296	env->sr = (env->sr & 0xffe0)
1297	\| env->cc_dest \| (env->cc_x << 4);
1298	#elif defined(TARGET_MIPS)
1299	#elif defined(TARGET_SH4)
1300	/* XXXXX */
1301	#else
1302	#error unsupported target CPU
1303	#endif
1304	#if defined(__sparc__) && !defined(HOST_SOLARIS)
1305	asm volatile ("mov %0, %%i7" : : "r" (saved_i7));
1306	#endif
1307	#include "hostregs_helper.h"
1308
1309	/* fail safe : never use cpu_single_env outside cpu_exec() */
1310	cpu_single_env = NULL;
1311	return ret;
1312	}
1313
1314	#endif /* !VBOX */
1315
1316	/* must only be called from the generated code as an exception can be
1317	generated */
1318	void tb_invalidate_page_range(target_ulong start, target_ulong end)
1319	{
1320	/* XXX: cannot enable it yet because it yields to MMU exception
1321	where NIP != read address on PowerPC */
1322	#if 0
1323	target_ulong phys_addr;
1324	phys_addr = get_phys_addr_code(env, start);
1325	tb_invalidate_phys_page_range(phys_addr, phys_addr + end - start, 0);
1326	#endif
1327	}
1328
1329	#if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
1330
1331	void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector)
1332	{
1333	CPUX86State *saved_env;
1334
1335	saved_env = env;
1336	env = s;
1337	if (!(env->cr[0] & CR0_PE_MASK) \|\| (env->eflags & VM_MASK)) {
1338	selector &= 0xffff;
1339	cpu_x86_load_seg_cache(env, seg_reg, selector,
1340	(selector << 4), 0xffff, 0);
1341	} else {
1342	load_seg(seg_reg, selector);
1343	}
1344	env = saved_env;
1345	}
1346
1347	void cpu_x86_fsave(CPUX86State s, uint8_t ptr, int data32)
1348	{
1349	CPUX86State *saved_env;
1350
1351	saved_env = env;
1352	env = s;
1353
1354	helper_fsave((target_ulong)ptr, data32);
1355
1356	env = saved_env;
1357	}
1358
1359	void cpu_x86_frstor(CPUX86State s, uint8_t ptr, int data32)
1360	{
1361	CPUX86State *saved_env;
1362
1363	saved_env = env;
1364	env = s;
1365
1366	helper_frstor((target_ulong)ptr, data32);
1367
1368	env = saved_env;
1369	}
1370
1371	#endif /* TARGET_I386 */
1372
1373	#if !defined(CONFIG_SOFTMMU)
1374
1375	#if defined(TARGET_I386)
1376
1377	/* 'pc' is the host PC at which the exception was raised. 'address' is
1378	the effective address of the memory exception. 'is_write' is 1 if a
1379	write caused the exception and otherwise 0'. 'old_set' is the
1380	signal set which should be restored */
1381	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1382	int is_write, sigset_t *old_set,
1383	void *puc)
1384	{
1385	TranslationBlock *tb;
1386	int ret;
1387
1388	if (cpu_single_env)
1389	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1390	#if defined(DEBUG_SIGNAL)
1391	qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1392	pc, address, is_write, (unsigned long )old_set);
1393	#endif
1394	/* XXX: locking issue */
1395	if (is_write && page_unprotect(h2g(address), pc, puc)) {
1396	return 1;
1397	}
1398
1399	/* see if it is an MMU fault */
1400	ret = cpu_x86_handle_mmu_fault(env, address, is_write,
1401	((env->hflags & HF_CPL_MASK) == 3), 0);
1402	if (ret < 0)
1403	return 0; /* not an MMU fault */
1404	if (ret == 0)
1405	return 1; /* the MMU fault was handled without causing real CPU fault */
1406	/* now we have a real cpu fault */
1407	tb = tb_find_pc(pc);
1408	if (tb) {
1409	/* the PC is inside the translated code. It means that we have
1410	a virtual CPU fault */
1411	cpu_restore_state(tb, env, pc, puc);
1412	}
1413	if (ret == 1) {
1414	#if 0
1415	printf("PF exception: EIP=0x%08x CR2=0x%08x error=0x%x\n",
1416	env->eip, env->cr[2], env->error_code);
1417	#endif
1418	/* we restore the process signal mask as the sigreturn should
1419	do it (XXX: use sigsetjmp) */
1420	sigprocmask(SIG_SETMASK, old_set, NULL);
1421	raise_exception_err(env->exception_index, env->error_code);
1422	} else {
1423	/* activate soft MMU for this block */
1424	env->hflags \|= HF_SOFTMMU_MASK;
1425	cpu_resume_from_signal(env, puc);
1426	}
1427	/* never comes here */
1428	return 1;
1429	}
1430
1431	#elif defined(TARGET_ARM)
1432	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1433	int is_write, sigset_t *old_set,
1434	void *puc)
1435	{
1436	TranslationBlock *tb;
1437	int ret;
1438
1439	if (cpu_single_env)
1440	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1441	#if defined(DEBUG_SIGNAL)
1442	printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1443	pc, address, is_write, (unsigned long )old_set);
1444	#endif
1445	/* XXX: locking issue */
1446	if (is_write && page_unprotect(h2g(address), pc, puc)) {
1447	return 1;
1448	}
1449	/* see if it is an MMU fault */
1450	ret = cpu_arm_handle_mmu_fault(env, address, is_write, 1, 0);
1451	if (ret < 0)
1452	return 0; /* not an MMU fault */
1453	if (ret == 0)
1454	return 1; /* the MMU fault was handled without causing real CPU fault */
1455	/* now we have a real cpu fault */
1456	tb = tb_find_pc(pc);
1457	if (tb) {
1458	/* the PC is inside the translated code. It means that we have
1459	a virtual CPU fault */
1460	cpu_restore_state(tb, env, pc, puc);
1461	}
1462	/* we restore the process signal mask as the sigreturn should
1463	do it (XXX: use sigsetjmp) */
1464	sigprocmask(SIG_SETMASK, old_set, NULL);
1465	cpu_loop_exit();
1466	}
1467	#elif defined(TARGET_SPARC)
1468	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1469	int is_write, sigset_t *old_set,
1470	void *puc)
1471	{
1472	TranslationBlock *tb;
1473	int ret;
1474
1475	if (cpu_single_env)
1476	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1477	#if defined(DEBUG_SIGNAL)
1478	printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1479	pc, address, is_write, (unsigned long )old_set);
1480	#endif
1481	/* XXX: locking issue */
1482	if (is_write && page_unprotect(h2g(address), pc, puc)) {
1483	return 1;
1484	}
1485	/* see if it is an MMU fault */
1486	ret = cpu_sparc_handle_mmu_fault(env, address, is_write, 1, 0);
1487	if (ret < 0)
1488	return 0; /* not an MMU fault */
1489	if (ret == 0)
1490	return 1; /* the MMU fault was handled without causing real CPU fault */
1491	/* now we have a real cpu fault */
1492	tb = tb_find_pc(pc);
1493	if (tb) {
1494	/* the PC is inside the translated code. It means that we have
1495	a virtual CPU fault */
1496	cpu_restore_state(tb, env, pc, puc);
1497	}
1498	/* we restore the process signal mask as the sigreturn should
1499	do it (XXX: use sigsetjmp) */
1500	sigprocmask(SIG_SETMASK, old_set, NULL);
1501	cpu_loop_exit();
1502	}
1503	#elif defined (TARGET_PPC)
1504	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1505	int is_write, sigset_t *old_set,
1506	void *puc)
1507	{
1508	TranslationBlock *tb;
1509	int ret;
1510
1511	if (cpu_single_env)
1512	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1513	#if defined(DEBUG_SIGNAL)
1514	printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1515	pc, address, is_write, (unsigned long )old_set);
1516	#endif
1517	/* XXX: locking issue */
1518	if (is_write && page_unprotect(h2g(address), pc, puc)) {
1519	return 1;
1520	}
1521
1522	/* see if it is an MMU fault */
1523	ret = cpu_ppc_handle_mmu_fault(env, address, is_write, msr_pr, 0);
1524	if (ret < 0)
1525	return 0; /* not an MMU fault */
1526	if (ret == 0)
1527	return 1; /* the MMU fault was handled without causing real CPU fault */
1528
1529	/* now we have a real cpu fault */
1530	tb = tb_find_pc(pc);
1531	if (tb) {
1532	/* the PC is inside the translated code. It means that we have
1533	a virtual CPU fault */
1534	cpu_restore_state(tb, env, pc, puc);
1535	}
1536	if (ret == 1) {
1537	#if 0
1538	printf("PF exception: NIP=0x%08x error=0x%x %p\n",
1539	env->nip, env->error_code, tb);
1540	#endif
1541	/* we restore the process signal mask as the sigreturn should
1542	do it (XXX: use sigsetjmp) */
1543	sigprocmask(SIG_SETMASK, old_set, NULL);
1544	do_raise_exception_err(env->exception_index, env->error_code);
1545	} else {
1546	/* activate soft MMU for this block */
1547	cpu_resume_from_signal(env, puc);
1548	}
1549	/* never comes here */
1550	return 1;
1551	}
1552
1553	#elif defined(TARGET_M68K)
1554	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1555	int is_write, sigset_t *old_set,
1556	void *puc)
1557	{
1558	TranslationBlock *tb;
1559	int ret;
1560
1561	if (cpu_single_env)
1562	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1563	#if defined(DEBUG_SIGNAL)
1564	printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1565	pc, address, is_write, (unsigned long )old_set);
1566	#endif
1567	/* XXX: locking issue */
1568	if (is_write && page_unprotect(address, pc, puc)) {
1569	return 1;
1570	}
1571	/* see if it is an MMU fault */
1572	ret = cpu_m68k_handle_mmu_fault(env, address, is_write, 1, 0);
1573	if (ret < 0)
1574	return 0; /* not an MMU fault */
1575	if (ret == 0)
1576	return 1; /* the MMU fault was handled without causing real CPU fault */
1577	/* now we have a real cpu fault */
1578	tb = tb_find_pc(pc);
1579	if (tb) {
1580	/* the PC is inside the translated code. It means that we have
1581	a virtual CPU fault */
1582	cpu_restore_state(tb, env, pc, puc);
1583	}
1584	/* we restore the process signal mask as the sigreturn should
1585	do it (XXX: use sigsetjmp) */
1586	sigprocmask(SIG_SETMASK, old_set, NULL);
1587	cpu_loop_exit();
1588	/* never comes here */
1589	return 1;
1590	}
1591
1592	#elif defined (TARGET_MIPS)
1593	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1594	int is_write, sigset_t *old_set,
1595	void *puc)
1596	{
1597	TranslationBlock *tb;
1598	int ret;
1599
1600	if (cpu_single_env)
1601	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1602	#if defined(DEBUG_SIGNAL)
1603	printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1604	pc, address, is_write, (unsigned long )old_set);
1605	#endif
1606	/* XXX: locking issue */
1607	if (is_write && page_unprotect(h2g(address), pc, puc)) {
1608	return 1;
1609	}
1610
1611	/* see if it is an MMU fault */
1612	ret = cpu_mips_handle_mmu_fault(env, address, is_write, 1, 0);
1613	if (ret < 0)
1614	return 0; /* not an MMU fault */
1615	if (ret == 0)
1616	return 1; /* the MMU fault was handled without causing real CPU fault */
1617
1618	/* now we have a real cpu fault */
1619	tb = tb_find_pc(pc);
1620	if (tb) {
1621	/* the PC is inside the translated code. It means that we have
1622	a virtual CPU fault */
1623	cpu_restore_state(tb, env, pc, puc);
1624	}
1625	if (ret == 1) {
1626	#if 0
1627	printf("PF exception: NIP=0x%08x error=0x%x %p\n",
1628	env->nip, env->error_code, tb);
1629	#endif
1630	/* we restore the process signal mask as the sigreturn should
1631	do it (XXX: use sigsetjmp) */
1632	sigprocmask(SIG_SETMASK, old_set, NULL);
1633	do_raise_exception_err(env->exception_index, env->error_code);
1634	} else {
1635	/* activate soft MMU for this block */
1636	cpu_resume_from_signal(env, puc);
1637	}
1638	/* never comes here */
1639	return 1;
1640	}
1641
1642	#elif defined (TARGET_SH4)
1643	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1644	int is_write, sigset_t *old_set,
1645	void *puc)
1646	{
1647	TranslationBlock *tb;
1648	int ret;
1649
1650	if (cpu_single_env)
1651	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1652	#if defined(DEBUG_SIGNAL)
1653	printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1654	pc, address, is_write, (unsigned long )old_set);
1655	#endif
1656	/* XXX: locking issue */
1657	if (is_write && page_unprotect(h2g(address), pc, puc)) {
1658	return 1;
1659	}
1660
1661	/* see if it is an MMU fault */
1662	ret = cpu_sh4_handle_mmu_fault(env, address, is_write, 1, 0);
1663	if (ret < 0)
1664	return 0; /* not an MMU fault */
1665	if (ret == 0)
1666	return 1; /* the MMU fault was handled without causing real CPU fault */
1667
1668	/* now we have a real cpu fault */
1669	tb = tb_find_pc(pc);
1670	if (tb) {
1671	/* the PC is inside the translated code. It means that we have
1672	a virtual CPU fault */
1673	cpu_restore_state(tb, env, pc, puc);
1674	}
1675	#if 0
1676	printf("PF exception: NIP=0x%08x error=0x%x %p\n",
1677	env->nip, env->error_code, tb);
1678	#endif
1679	/* we restore the process signal mask as the sigreturn should
1680	do it (XXX: use sigsetjmp) */
1681	sigprocmask(SIG_SETMASK, old_set, NULL);
1682	cpu_loop_exit();
1683	/* never comes here */
1684	return 1;
1685	}
1686	#else
1687	#error unsupported target CPU
1688	#endif
1689
1690	#if defined(__i386__)
1691
1692	#if defined(USE_CODE_COPY)
1693	static void cpu_send_trap(unsigned long pc, int trap,
1694	struct ucontext *uc)
1695	{
1696	TranslationBlock *tb;
1697
1698	if (cpu_single_env)
1699	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1700	/* now we have a real cpu fault */
1701	tb = tb_find_pc(pc);
1702	if (tb) {
1703	/* the PC is inside the translated code. It means that we have
1704	a virtual CPU fault */
1705	cpu_restore_state(tb, env, pc, uc);
1706	}
1707	sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
1708	raise_exception_err(trap, env->error_code);
1709	}
1710	#endif
1711
1712	int cpu_signal_handler(int host_signum, void *pinfo,
1713	void *puc)
1714	{
1715	siginfo_t *info = pinfo;
1716	struct ucontext *uc = puc;
1717	unsigned long pc;
1718	int trapno;
1719
1720	#ifndef REG_EIP
1721	/* for glibc 2.1 */
1722	#define REG_EIP EIP
1723	#define REG_ERR ERR
1724	#define REG_TRAPNO TRAPNO
1725	#endif
1726	pc = uc->uc_mcontext.gregs[REG_EIP];
1727	trapno = uc->uc_mcontext.gregs[REG_TRAPNO];
1728	#if defined(TARGET_I386) && defined(USE_CODE_COPY)
1729	if (trapno == 0x00 \|\| trapno == 0x05) {
1730	/* send division by zero or bound exception */
1731	cpu_send_trap(pc, trapno, uc);
1732	return 1;
1733	} else
1734	#endif
1735	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1736	trapno == 0xe ?
1737	(uc->uc_mcontext.gregs[REG_ERR] >> 1) & 1 : 0,
1738	&uc->uc_sigmask, puc);
1739	}
1740
1741	#elif defined(__x86_64__)
1742
1743	int cpu_signal_handler(int host_signum, void *pinfo,
1744	void *puc)
1745	{
1746	siginfo_t *info = pinfo;
1747	struct ucontext *uc = puc;
1748	unsigned long pc;
1749
1750	pc = uc->uc_mcontext.gregs[REG_RIP];
1751	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1752	uc->uc_mcontext.gregs[REG_TRAPNO] == 0xe ?
1753	(uc->uc_mcontext.gregs[REG_ERR] >> 1) & 1 : 0,
1754	&uc->uc_sigmask, puc);
1755	}
1756
1757	#elif defined(__powerpc__)
1758
1759	/***********************************************************************
1760	* signal context platform-specific definitions
1761	* From Wine
1762	*/
1763	#ifdef linux
1764	/* All Registers access - only for local access */
1765	# define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
1766	/* Gpr Registers access */
1767	# define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
1768	# define IAR_sig(context) REG_sig(nip, context) /* Program counter */
1769	# define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */
1770	# define CTR_sig(context) REG_sig(ctr, context) /* Count register */
1771	# define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */
1772	# define LR_sig(context) REG_sig(link, context) /* Link register */
1773	# define CR_sig(context) REG_sig(ccr, context) /* Condition register */
1774	/* Float Registers access */
1775	# define FLOAT_sig(reg_num, context) (((double)((char)((context)->uc_mcontext.regs+48*4)))[reg_num])
1776	# define FPSCR_sig(context) ((int)((char)((context)->uc_mcontext.regs+(48+322)*4)))
1777	/* Exception Registers access */
1778	# define DAR_sig(context) REG_sig(dar, context)
1779	# define DSISR_sig(context) REG_sig(dsisr, context)
1780	# define TRAP_sig(context) REG_sig(trap, context)
1781	#endif /* linux */
1782
1783	#ifdef __APPLE__
1784	# include <sys/ucontext.h>
1785	typedef struct ucontext SIGCONTEXT;
1786	/* All Registers access - only for local access */
1787	# define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
1788	# define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
1789	# define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
1790	# define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
1791	/* Gpr Registers access */
1792	# define GPR_sig(reg_num, context) REG_sig(r##reg_num, context)
1793	# define IAR_sig(context) REG_sig(srr0, context) /* Program counter */
1794	# define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */
1795	# define CTR_sig(context) REG_sig(ctr, context)
1796	# define XER_sig(context) REG_sig(xer, context) /* Link register */
1797	# define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */
1798	# define CR_sig(context) REG_sig(cr, context) /* Condition register */
1799	/* Float Registers access */
1800	# define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
1801	# define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context))
1802	/* Exception Registers access */
1803	# define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */
1804	# define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
1805	# define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
1806	#endif /* __APPLE__ */
1807
1808	int cpu_signal_handler(int host_signum, void *pinfo,
1809	void *puc)
1810	{
1811	siginfo_t *info = pinfo;
1812	struct ucontext *uc = puc;
1813	unsigned long pc;
1814	int is_write;
1815
1816	pc = IAR_sig(uc);
1817	is_write = 0;
1818	#if 0
1819	/* ppc 4xx case */
1820	if (DSISR_sig(uc) & 0x00800000)
1821	is_write = 1;
1822	#else
1823	if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000))
1824	is_write = 1;
1825	#endif
1826	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1827	is_write, &uc->uc_sigmask, puc);
1828	}
1829
1830	#elif defined(__alpha__)
1831
1832	int cpu_signal_handler(int host_signum, void *pinfo,
1833	void *puc)
1834	{
1835	siginfo_t *info = pinfo;
1836	struct ucontext *uc = puc;
1837	uint32_t *pc = uc->uc_mcontext.sc_pc;
1838	uint32_t insn = *pc;
1839	int is_write = 0;
1840
1841	/* XXX: need kernel patch to get write flag faster */
1842	switch (insn >> 26) {
1843	case 0x0d: // stw
1844	case 0x0e: // stb
1845	case 0x0f: // stq_u
1846	case 0x24: // stf
1847	case 0x25: // stg
1848	case 0x26: // sts
1849	case 0x27: // stt
1850	case 0x2c: // stl
1851	case 0x2d: // stq
1852	case 0x2e: // stl_c
1853	case 0x2f: // stq_c
1854	is_write = 1;
1855	}
1856
1857	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1858	is_write, &uc->uc_sigmask, puc);
1859	}
1860	#elif defined(__sparc__)
1861
1862	int cpu_signal_handler(int host_signum, void *pinfo,
1863	void *puc)
1864	{
1865	siginfo_t *info = pinfo;
1866	uint32_t regs = (uint32_t )(info + 1);
1867	void *sigmask = (regs + 20);
1868	unsigned long pc;
1869	int is_write;
1870	uint32_t insn;
1871
1872	/* XXX: is there a standard glibc define ? */
1873	pc = regs[1];
1874	/* XXX: need kernel patch to get write flag faster */
1875	is_write = 0;
1876	insn = (uint32_t )pc;
1877	if ((insn >> 30) == 3) {
1878	switch((insn >> 19) & 0x3f) {
1879	case 0x05: // stb
1880	case 0x06: // sth
1881	case 0x04: // st
1882	case 0x07: // std
1883	case 0x24: // stf
1884	case 0x27: // stdf
1885	case 0x25: // stfsr
1886	is_write = 1;
1887	break;
1888	}
1889	}
1890	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1891	is_write, sigmask, NULL);
1892	}
1893
1894	#elif defined(__arm__)
1895
1896	int cpu_signal_handler(int host_signum, void *pinfo,
1897	void *puc)
1898	{
1899	siginfo_t *info = pinfo;
1900	struct ucontext *uc = puc;
1901	unsigned long pc;
1902	int is_write;
1903
1904	pc = uc->uc_mcontext.gregs[R15];
1905	/* XXX: compute is_write */
1906	is_write = 0;
1907	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1908	is_write,
1909	&uc->uc_sigmask, puc);
1910	}
1911
1912	#elif defined(__mc68000)
1913
1914	int cpu_signal_handler(int host_signum, void *pinfo,
1915	void *puc)
1916	{
1917	siginfo_t *info = pinfo;
1918	struct ucontext *uc = puc;
1919	unsigned long pc;
1920	int is_write;
1921
1922	pc = uc->uc_mcontext.gregs[16];
1923	/* XXX: compute is_write */
1924	is_write = 0;
1925	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1926	is_write,
1927	&uc->uc_sigmask, puc);
1928	}
1929
1930	#elif defined(__ia64)
1931
1932	#ifndef __ISR_VALID
1933	/* This ought to be in <bits/siginfo.h>... */
1934	# define __ISR_VALID 1
1935	#endif
1936
1937	int cpu_signal_handler(int host_signum, void pinfo, void puc)
1938	{
1939	siginfo_t *info = pinfo;
1940	struct ucontext *uc = puc;
1941	unsigned long ip;
1942	int is_write = 0;
1943
1944	ip = uc->uc_mcontext.sc_ip;
1945	switch (host_signum) {
1946	case SIGILL:
1947	case SIGFPE:
1948	case SIGSEGV:
1949	case SIGBUS:
1950	case SIGTRAP:
1951	if (info->si_code && (info->si_segvflags & __ISR_VALID))
1952	/* ISR.W (write-access) is bit 33: */
1953	is_write = (info->si_isr >> 33) & 1;
1954	break;
1955
1956	default:
1957	break;
1958	}
1959	return handle_cpu_signal(ip, (unsigned long)info->si_addr,
1960	is_write,
1961	&uc->uc_sigmask, puc);
1962	}
1963
1964	#elif defined(__s390__)
1965
1966	int cpu_signal_handler(int host_signum, void *pinfo,
1967	void *puc)
1968	{
1969	siginfo_t *info = pinfo;
1970	struct ucontext *uc = puc;
1971	unsigned long pc;
1972	int is_write;
1973
1974	pc = uc->uc_mcontext.psw.addr;
1975	/* XXX: compute is_write */
1976	is_write = 0;
1977	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1978	is_write,
1979	&uc->uc_sigmask, puc);
1980	}
1981
1982	#else
1983
1984	#error host CPU specific signal handler needed
1985
1986	#endif
1987
1988	#endif /* !defined(CONFIG_SOFTMMU) */

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