cpu-exec.c@ 14664

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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
21	/*
22	* Sun LGPL Disclaimer: For the avoidance of doubt, except that if any license choice
23	* other than GPL or LGPL is available it will apply instead, Sun elects to use only
24	* the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where
25	* a choice of LGPL license versions is made available with the language indicating
26	* that LGPLv2 or any later version may be used, or where a choice of which version
27	* of the LGPL is applied is otherwise unspecified.
28	*/
29	#include "config.h"
30	#include "exec.h"
31	#include "disas.h"
32
33	#if !defined(CONFIG_SOFTMMU)
34	#undef EAX
35	#undef ECX
36	#undef EDX
37	#undef EBX
38	#undef ESP
39	#undef EBP
40	#undef ESI
41	#undef EDI
42	#undef EIP
43	#include <signal.h>
44	#include <sys/ucontext.h>
45	#endif
46
47	int tb_invalidated_flag;
48
49	//#define DEBUG_EXEC
50	//#define DEBUG_SIGNAL
51
52	#if defined(TARGET_ARM) \|\| defined(TARGET_SPARC) \|\| defined(TARGET_M68K)
53	/* XXX: unify with i386 target */
54	void cpu_loop_exit(void)
55	{
56	longjmp(env->jmp_env, 1);
57	}
58	#endif
59	#if !(defined(TARGET_SPARC) \|\| defined(TARGET_SH4) \|\| defined(TARGET_M68K))
60	#define reg_T2
61	#endif
62
63	/* exit the current TB from a signal handler. The host registers are
64	restored in a state compatible with the CPU emulator
65	*/
66	void cpu_resume_from_signal(CPUState env1, void puc)
67	{
68	#if !defined(CONFIG_SOFTMMU)
69	struct ucontext *uc = puc;
70	#endif
71
72	env = env1;
73
74	/* XXX: restore cpu registers saved in host registers */
75
76	#if !defined(CONFIG_SOFTMMU)
77	if (puc) {
78	/* XXX: use siglongjmp ? */
79	sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
80	}
81	#endif
82	longjmp(env->jmp_env, 1);
83	}
84
85
86	static TranslationBlock *tb_find_slow(target_ulong pc,
87	target_ulong cs_base,
88	unsigned int flags)
89	{
90	TranslationBlock tb, *ptb1;
91	int code_gen_size;
92	unsigned int h;
93	target_ulong phys_pc, phys_page1, phys_page2, virt_page2;
94	uint8_t *tc_ptr;
95
96	spin_lock(&tb_lock);
97
98	tb_invalidated_flag = 0;
99
100	regs_to_env(); /* XXX: do it just before cpu_gen_code() */
101
102	/* find translated block using physical mappings */
103	phys_pc = get_phys_addr_code(env, pc);
104	phys_page1 = phys_pc & TARGET_PAGE_MASK;
105	phys_page2 = -1;
106	h = tb_phys_hash_func(phys_pc);
107	ptb1 = &tb_phys_hash[h];
108	for(;;) {
109	tb = *ptb1;
110	if (!tb)
111	goto not_found;
112	if (tb->pc == pc &&
113	tb->page_addr[0] == phys_page1 &&
114	tb->cs_base == cs_base &&
115	tb->flags == flags) {
116	/* check next page if needed */
117	if (tb->page_addr[1] != -1) {
118	virt_page2 = (pc & TARGET_PAGE_MASK) +
119	TARGET_PAGE_SIZE;
120	phys_page2 = get_phys_addr_code(env, virt_page2);
121	if (tb->page_addr[1] == phys_page2)
122	goto found;
123	} else {
124	goto found;
125	}
126	}
127	ptb1 = &tb->phys_hash_next;
128	}
129	not_found:
130	/* if no translated code available, then translate it now */
131	tb = tb_alloc(pc);
132	if (!tb) {
133	/* flush must be done */
134	tb_flush(env);
135	/* cannot fail at this point */
136	tb = tb_alloc(pc);
137	/* don't forget to invalidate previous TB info */
138	tb_invalidated_flag = 1;
139	}
140	tc_ptr = code_gen_ptr;
141	tb->tc_ptr = tc_ptr;
142	tb->cs_base = cs_base;
143	tb->flags = flags;
144	cpu_gen_code(env, tb, CODE_GEN_MAX_SIZE, &code_gen_size);
145	code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1));
146
147	/* check next page if needed */
148	virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK;
149	phys_page2 = -1;
150	if ((pc & TARGET_PAGE_MASK) != virt_page2) {
151	phys_page2 = get_phys_addr_code(env, virt_page2);
152	}
153	tb_link_phys(tb, phys_pc, phys_page2);
154
155	found:
156	/* we add the TB in the virtual pc hash table */
157	env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)] = tb;
158	spin_unlock(&tb_lock);
159	return tb;
160	}
161
162	static inline TranslationBlock *tb_find_fast(void)
163	{
164	TranslationBlock *tb;
165	target_ulong cs_base, pc;
166	unsigned int flags;
167
168	/* we record a subset of the CPU state. It will
169	always be the same before a given translated block
170	is executed. */
171	#if defined(TARGET_I386)
172	flags = env->hflags;
173	flags \|= (env->eflags & (IOPL_MASK \| TF_MASK \| VM_MASK));
174	cs_base = env->segs[R_CS].base;
175	pc = cs_base + env->eip;
176	#elif defined(TARGET_ARM)
177	flags = env->thumb \| (env->vfp.vec_len << 1)
178	\| (env->vfp.vec_stride << 4);
179	if ((env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR)
180	flags \|= (1 << 6);
181	if (env->vfp.xregs[ARM_VFP_FPEXC] & (1 << 30))
182	flags \|= (1 << 7);
183	cs_base = 0;
184	pc = env->regs[15];
185	#elif defined(TARGET_SPARC)
186	#ifdef TARGET_SPARC64
187	// Combined FPU enable bits . PRIV . DMMU enabled . IMMU enabled
188	flags = (((env->pstate & PS_PEF) >> 1) \| ((env->fprs & FPRS_FEF) << 2))
189	\| (env->pstate & PS_PRIV) \| ((env->lsu & (DMMU_E \| IMMU_E)) >> 2);
190	#else
191	// FPU enable . MMU enabled . MMU no-fault . Supervisor
192	flags = (env->psref << 3) \| ((env->mmuregs[0] & (MMU_E \| MMU_NF)) << 1)
193	\| env->psrs;
194	#endif
195	cs_base = env->npc;
196	pc = env->pc;
197	#elif defined(TARGET_PPC)
198	flags = (msr_pr << MSR_PR) \| (msr_fp << MSR_FP) \|
199	(msr_se << MSR_SE) \| (msr_le << MSR_LE);
200	cs_base = 0;
201	pc = env->nip;
202	#elif defined(TARGET_MIPS)
203	flags = env->hflags & (MIPS_HFLAG_TMASK \| MIPS_HFLAG_BMASK);
204	cs_base = 0;
205	pc = env->PC;
206	#elif defined(TARGET_M68K)
207	flags = env->fpcr & M68K_FPCR_PREC;
208	cs_base = 0;
209	pc = env->pc;
210	#elif defined(TARGET_SH4)
211	flags = env->sr & (SR_MD \| SR_RB);
212	cs_base = 0; /* XXXXX */
213	pc = env->pc;
214	#else
215	#error unsupported CPU
216	#endif
217	tb = env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)];
218	if (__builtin_expect(!tb \|\| tb->pc != pc \|\| tb->cs_base != cs_base \|\|
219	tb->flags != flags, 0)) {
220	tb = tb_find_slow(pc, cs_base, flags);
221	/* Note: we do it here to avoid a gcc bug on Mac OS X when
222	doing it in tb_find_slow */
223	if (tb_invalidated_flag) {
224	/* as some TB could have been invalidated because
225	of memory exceptions while generating the code, we
226	must recompute the hash index here */
227	T0 = 0;
228	}
229	}
230	return tb;
231	}
232
233
234	/* main execution loop */
235
236	#ifdef VBOX
237
238	int cpu_exec(CPUState *env1)
239	{
240	#define DECLARE_HOST_REGS 1
241	#include "hostregs_helper.h"
242	int ret, interrupt_request;
243	void (*gen_func)(void);
244	TranslationBlock *tb;
245	uint8_t *tc_ptr;
246
247	#if defined(TARGET_I386)
248	/* handle exit of HALTED state */
249	if (env1->hflags & HF_HALTED_MASK) {
250	/* disable halt condition */
251	if ((env1->interrupt_request & CPU_INTERRUPT_HARD) &&
252	(env1->eflags & IF_MASK)) {
253	env1->hflags &= ~HF_HALTED_MASK;
254	} else {
255	return EXCP_HALTED;
256	}
257	}
258	#elif defined(TARGET_PPC)
259	if (env1->halted) {
260	if (env1->msr[MSR_EE] &&
261	(env1->interrupt_request &
262	(CPU_INTERRUPT_HARD \| CPU_INTERRUPT_TIMER))) {
263	env1->halted = 0;
264	} else {
265	return EXCP_HALTED;
266	}
267	}
268	#elif defined(TARGET_SPARC)
269	if (env1->halted) {
270	if ((env1->interrupt_request & CPU_INTERRUPT_HARD) &&
271	(env1->psret != 0)) {
272	env1->halted = 0;
273	} else {
274	return EXCP_HALTED;
275	}
276	}
277	#elif defined(TARGET_ARM)
278	if (env1->halted) {
279	/* An interrupt wakes the CPU even if the I and F CPSR bits are
280	set. */
281	if (env1->interrupt_request
282	& (CPU_INTERRUPT_FIQ \| CPU_INTERRUPT_HARD)) {
283	env1->halted = 0;
284	} else {
285	return EXCP_HALTED;
286	}
287	}
288	#elif defined(TARGET_MIPS)
289	if (env1->halted) {
290	if (env1->interrupt_request &
291	(CPU_INTERRUPT_HARD \| CPU_INTERRUPT_TIMER)) {
292	env1->halted = 0;
293	} else {
294	return EXCP_HALTED;
295	}
296	}
297	#endif
298
299	cpu_single_env = env1;
300
301	/* first we save global registers */
302	#define SAVE_HOST_REGS 1
303	#include "hostregs_helper.h"
304	env = env1;
305	#if defined(__sparc__) && !defined(HOST_SOLARIS)
306	/* we also save i7 because longjmp may not restore it */
307	asm volatile ("mov %%i7, %0" : "=r" (saved_i7));
308	#endif
309
310	#if defined(TARGET_I386)
311
312	env_to_regs();
313	/* put eflags in CPU temporary format */
314	CC_SRC = env->eflags & (CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
315	DF = 1 - (2 * ((env->eflags >> 10) & 1));
316	CC_OP = CC_OP_EFLAGS;
317	env->eflags &= ~(DF_MASK \| CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
318	#elif defined(TARGET_ARM)
319	#elif defined(TARGET_SPARC)
320	#if defined(reg_REGWPTR)
321	saved_regwptr = REGWPTR;
322	#endif
323	#elif defined(TARGET_PPC)
324	#elif defined(TARGET_MIPS)
325	#elif defined(TARGET_SH4)
326	/* XXXXX */
327	#else
328	#error unsupported target CPU
329	#endif
330	#ifndef VBOX /* VBOX: We need to raise traps and suchlike from the outside. */
331	env->exception_index = -1;
332	#endif
333
334	/* prepare setjmp context for exception handling */
335	for(;;) {
336	if (setjmp(env->jmp_env) == 0)
337	{
338	env->current_tb = NULL;
339	VMMR3Unlock(env->pVM);
340	VMMR3Lock(env->pVM);
341
342	/*
343	* Check for fatal errors first
344	*/
345	if (env->interrupt_request & CPU_INTERRUPT_RC) {
346	env->exception_index = EXCP_RC;
347	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_RC);
348	ret = env->exception_index;
349	cpu_loop_exit();
350	}
351
352	/* if an exception is pending, we execute it here */
353	if (env->exception_index >= 0) {
354	Assert(!env->user_mode_only);
355	if (env->exception_index >= EXCP_INTERRUPT) {
356	/* exit request from the cpu execution loop */
357	ret = env->exception_index;
358	break;
359	} else {
360	/* simulate a real cpu exception. On i386, it can
361	trigger new exceptions, but we do not handle
362	double or triple faults yet. */
363	RAWEx_ProfileStart(env, STATS_IRQ_HANDLING);
364	Log(("do_interrupt %d %d %RGv\n", env->exception_index, env->exception_is_int, env->exception_next_eip));
365	do_interrupt(env->exception_index,
366	env->exception_is_int,
367	env->error_code,
368	env->exception_next_eip, 0);
369	RAWEx_ProfileStop(env, STATS_IRQ_HANDLING);
370	}
371	env->exception_index = -1;
372	}
373
374	T0 = 0; /* force lookup of first TB */
375	for(;;)
376	{
377	interrupt_request = env->interrupt_request;
378	if (__builtin_expect(interrupt_request, 0))
379	{
380	/* Single instruction exec request, we execute it and return (one way or the other).
381	The caller will always reschedule after doing this operation! */
382	if (interrupt_request & CPU_INTERRUPT_SINGLE_INSTR)
383	{
384	/* not in flight are we? (if we are, we trapped) */
385	if (!(env->interrupt_request & CPU_INTERRUPT_SINGLE_INSTR_IN_FLIGHT))
386	{
387	ASMAtomicOrS32(&env->interrupt_request, CPU_INTERRUPT_SINGLE_INSTR_IN_FLIGHT);
388	env->exception_index = EXCP_SINGLE_INSTR;
389	if (emulate_single_instr(env) == -1)
390	AssertMsgFailed(("REM: emulate_single_instr failed for EIP=%RGv!!\n", env->eip));
391
392	/* When we receive an external interrupt during execution of this single
393	instruction, then we should stay here. We will leave when we're ready
394	for raw-mode or when interrupted by pending EMT requests. */
395	interrupt_request = env->interrupt_request; /* reload this! */
396	if ( !(interrupt_request & CPU_INTERRUPT_HARD)
397	\|\| !(env->eflags & IF_MASK)
398	\|\| (env->hflags & HF_INHIBIT_IRQ_MASK)
399	\|\| (env->state & CPU_RAW_HWACC)
400	)
401	{
402	env->exception_index = ret = EXCP_SINGLE_INSTR;
403	cpu_loop_exit();
404	}
405	}
406	/* Clear CPU_INTERRUPT_SINGLE_INSTR and leave CPU_INTERRUPT_SINGLE_INSTR_IN_FLIGHT set. */
407	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_SINGLE_INSTR);
408	}
409
410	RAWEx_ProfileStart(env, STATS_IRQ_HANDLING);
411	if ((interrupt_request & CPU_INTERRUPT_SMI) &&
412	!(env->hflags & HF_SMM_MASK)) {
413	env->interrupt_request &= ~CPU_INTERRUPT_SMI;
414	do_smm_enter();
415	T0 = 0;
416	}
417	else if ((interrupt_request & CPU_INTERRUPT_HARD) &&
418	(env->eflags & IF_MASK) &&
419	!(env->hflags & HF_INHIBIT_IRQ_MASK))
420	{
421	/* if hardware interrupt pending, we execute it */
422	int intno;
423	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_HARD);
424	intno = cpu_get_pic_interrupt(env);
425	if (intno >= 0)
426	{
427	Log(("do_interrupt %d\n", intno));
428	do_interrupt(intno, 0, 0, 0, 1);
429	}
430	/* ensure that no TB jump will be modified as
431	the program flow was changed */
432	T0 = 0;
433	}
434	if (env->interrupt_request & CPU_INTERRUPT_EXITTB)
435	{
436	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_EXITTB);
437	/* ensure that no TB jump will be modified as
438	the program flow was changed */
439	T0 = 0;
440	}
441	RAWEx_ProfileStop(env, STATS_IRQ_HANDLING);
442	if (interrupt_request & CPU_INTERRUPT_EXIT)
443	{
444	env->exception_index = EXCP_INTERRUPT;
445	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_EXIT);
446	ret = env->exception_index;
447	cpu_loop_exit();
448	}
449	if (interrupt_request & CPU_INTERRUPT_RC)
450	{
451	env->exception_index = EXCP_RC;
452	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_RC);
453	ret = env->exception_index;
454	cpu_loop_exit();
455	}
456	}
457
458	/*
459	* Check if we the CPU state allows us to execute the code in raw-mode.
460	*/
461	RAWEx_ProfileStart(env, STATS_RAW_CHECK);
462	if (remR3CanExecuteRaw(env,
463	env->eip + env->segs[R_CS].base,
464	env->hflags \| (env->eflags & (IOPL_MASK \| TF_MASK \| VM_MASK)),
465	&env->exception_index))
466	{
467	RAWEx_ProfileStop(env, STATS_RAW_CHECK);
468	ret = env->exception_index;
469	cpu_loop_exit();
470	}
471	RAWEx_ProfileStop(env, STATS_RAW_CHECK);
472
473	RAWEx_ProfileStart(env, STATS_TLB_LOOKUP);
474	tb = tb_find_fast();
475
476	/* see if we can patch the calling TB. When the TB
477	spans two pages, we cannot safely do a direct
478	jump. */
479	if (T0 != 0
480	&& !(tb->cflags & CF_RAW_MODE)
481	&& tb->page_addr[1] == -1)
482	{
483	spin_lock(&tb_lock);
484	tb_add_jump((TranslationBlock *)(long)(T0 & ~3), T0 & 3, tb);
485	spin_unlock(&tb_lock);
486	}
487	tc_ptr = tb->tc_ptr;
488	env->current_tb = tb;
489	/* execute the generated code */
490	gen_func = (void *)tc_ptr;
491	RAWEx_ProfileStop(env, STATS_TLB_LOOKUP);
492
493	#if defined(DEBUG) && defined(VBOX) && !defined(DEBUG_dmik)
494	#if !defined(DEBUG_bird)
495	if (((env->hflags >> HF_CPL_SHIFT) & 3) == 0 && (env->hflags & HF_PE_MASK) && (env->cr[0] & CR0_PG_MASK))
496	{
497	if(!(env->state & CPU_EMULATE_SINGLE_STEP))
498	{
499	Log(("EMR0: %RGv ESP=%RGv 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));
500	}
501	}
502	else
503	if (((env->hflags >> HF_CPL_SHIFT) & 3) == 3 && (env->hflags & HF_PE_MASK) && (env->cr[0] & CR0_PG_MASK))
504	{
505	if(!(env->state & CPU_EMULATE_SINGLE_STEP))
506	{
507	if(env->eflags & VM_MASK)
508	{
509	Log(("EMV86: %04X:%RGv IF=%d TF=%d CPL=%d CR0=%RGr\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]));
510	}
511	else
512	{
513	Log(("EMR3: %RGv ESP=%RGv IF=%d TF=%d CPL=%d IOPL=%d CR0=%RGr\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]));
514	}
515	}
516	}
517	else
518	{
519	/* Seriously slows down realmode booting. */
520	LogFlow(("EMRM: %04X:%RGv SS:ESP=%04X:%RGv 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));
521	}
522	#endif /* !DEBUG_bird */
523	if(env->state & CPU_EMULATE_SINGLE_STEP)
524	{
525	#ifdef DEBUG_bird
526	static int s_cTimes = 0;
527	if (s_cTimes++ > 1000000)
528	{
529	RTLogPrintf("Enough stepping!\n");
530	#if 0
531	env->exception_index = EXCP_DEBUG;
532	ret = env->exception_index;
533	cpu_loop_exit();
534	#else
535	env->state &= ~CPU_EMULATE_SINGLE_STEP;
536	#endif
537	}
538	#endif
539	TMCpuTickPause(env->pVM);
540	remR3DisasInstr(env, -1, NULL);
541	TMCpuTickResume(env->pVM);
542	if(emulate_single_instr(env) == -1)
543	{
544	Log(("emulate_single_instr failed for EIP=%RGv!!\n", env->eip));
545	}
546	}
547	else
548	{
549	RAWEx_ProfileStart(env, STATS_QEMU_RUN_EMULATED_CODE);
550	gen_func();
551	RAWEx_ProfileStop(env, STATS_QEMU_RUN_EMULATED_CODE);
552	}
553	#else /* !DEBUG \|\| !VBOX \|\| DEBUG_dmik */
554
555	RAWEx_ProfileStart(env, STATS_QEMU_RUN_EMULATED_CODE);
556	gen_func();
557	RAWEx_ProfileStop(env, STATS_QEMU_RUN_EMULATED_CODE);
558
559	#endif /* !DEBUG \|\| !VBOX \|\| DEBUG_dmik */
560	env->current_tb = NULL;
561	/* reset soft MMU for next block (it can currently
562	only be set by a memory fault) */
563	#if defined(TARGET_I386) && !defined(CONFIG_SOFTMMU)
564	if (env->hflags & HF_SOFTMMU_MASK) {
565	env->hflags &= ~HF_SOFTMMU_MASK;
566	/* do not allow linking to another block */
567	T0 = 0;
568	}
569	#endif
570	}
571	} else {
572	env_to_regs();
573	}
574	#ifdef VBOX_HIGH_RES_TIMERS_HACK
575	/* NULL the current_tb here so cpu_interrupt() doesn't do
576	anything unnecessary (like crashing during emulate single instruction). */
577	env->current_tb = NULL;
578	TMTimerPoll(env1->pVM);
579	#endif
580	} /* for(;;) */
581
582	#if defined(TARGET_I386)
583	/* restore flags in standard format */
584	env->eflags = env->eflags \| cc_table[CC_OP].compute_all() \| (DF & DF_MASK);
585	#else
586	#error unsupported target CPU
587	#endif
588	#include "hostregs_helper.h"
589	return ret;
590	}
591
592
593	#else /* !VBOX */
594
595
596	int cpu_exec(CPUState *env1)
597	{
598	#define DECLARE_HOST_REGS 1
599	#include "hostregs_helper.h"
600	#if defined(__sparc__) && !defined(HOST_SOLARIS)
601	int saved_i7;
602	target_ulong tmp_T0;
603	#endif
604	int ret, interrupt_request;
605	void (*gen_func)(void);
606	TranslationBlock *tb;
607	uint8_t *tc_ptr;
608
609	#if defined(TARGET_I386)
610	/* handle exit of HALTED state */
611	if (env1->hflags & HF_HALTED_MASK) {
612	/* disable halt condition */
613	if ((env1->interrupt_request & CPU_INTERRUPT_HARD) &&
614	(env1->eflags & IF_MASK)) {
615	env1->hflags &= ~HF_HALTED_MASK;
616	} else {
617	return EXCP_HALTED;
618	}
619	}
620	#elif defined(TARGET_PPC)
621	if (env1->halted) {
622	if (env1->msr[MSR_EE] &&
623	(env1->interrupt_request &
624	(CPU_INTERRUPT_HARD \| CPU_INTERRUPT_TIMER))) {
625	env1->halted = 0;
626	} else {
627	return EXCP_HALTED;
628	}
629	}
630	#elif defined(TARGET_SPARC)
631	if (env1->halted) {
632	if ((env1->interrupt_request & CPU_INTERRUPT_HARD) &&
633	(env1->psret != 0)) {
634	env1->halted = 0;
635	} else {
636	return EXCP_HALTED;
637	}
638	}
639	#elif defined(TARGET_ARM)
640	if (env1->halted) {
641	/* An interrupt wakes the CPU even if the I and F CPSR bits are
642	set. */
643	if (env1->interrupt_request
644	& (CPU_INTERRUPT_FIQ \| CPU_INTERRUPT_HARD)) {
645	env1->halted = 0;
646	} else {
647	return EXCP_HALTED;
648	}
649	}
650	#elif defined(TARGET_MIPS)
651	if (env1->halted) {
652	if (env1->interrupt_request &
653	(CPU_INTERRUPT_HARD \| CPU_INTERRUPT_TIMER)) {
654	env1->halted = 0;
655	} else {
656	return EXCP_HALTED;
657	}
658	}
659	#endif
660
661	cpu_single_env = env1;
662
663	/* first we save global registers */
664	#define SAVE_HOST_REGS 1
665	#include "hostregs_helper.h"
666	env = env1;
667	#if defined(__sparc__) && !defined(HOST_SOLARIS)
668	/* we also save i7 because longjmp may not restore it */
669	asm volatile ("mov %%i7, %0" : "=r" (saved_i7));
670	#endif
671
672	#if defined(TARGET_I386)
673	env_to_regs();
674	/* put eflags in CPU temporary format */
675	CC_SRC = env->eflags & (CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
676	DF = 1 - (2 * ((env->eflags >> 10) & 1));
677	CC_OP = CC_OP_EFLAGS;
678	env->eflags &= ~(DF_MASK \| CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
679	#elif defined(TARGET_ARM)
680	#elif defined(TARGET_SPARC)
681	#if defined(reg_REGWPTR)
682	saved_regwptr = REGWPTR;
683	#endif
684	#elif defined(TARGET_PPC)
685	#elif defined(TARGET_M68K)
686	env->cc_op = CC_OP_FLAGS;
687	env->cc_dest = env->sr & 0xf;
688	env->cc_x = (env->sr >> 4) & 1;
689	#elif defined(TARGET_MIPS)
690	#elif defined(TARGET_SH4)
691	/* XXXXX */
692	#else
693	#error unsupported target CPU
694	#endif
695	#ifndef VBOX /* VBOX: We need to raise traps and suchlike from the outside. */
696	env->exception_index = -1;
697	#endif
698
699	/* prepare setjmp context for exception handling */
700	for(;;) {
701	if (setjmp(env->jmp_env) == 0) {
702	env->current_tb = NULL;
703	#ifdef VBOX
704	VMMR3Unlock(env->pVM);
705	VMMR3Lock(env->pVM);
706
707	/* Check for high priority requests first (like fatal
708	errors). */
709	if (env->interrupt_request & CPU_INTERRUPT_RC) {
710	env->exception_index = EXCP_RC;
711	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_RC);
712	ret = env->exception_index;
713	cpu_loop_exit();
714	}
715	#endif /* VBOX */
716
717
718	/* if an exception is pending, we execute it here */
719	if (env->exception_index >= 0) {
720	if (env->exception_index >= EXCP_INTERRUPT) {
721	/* exit request from the cpu execution loop */
722	ret = env->exception_index;
723	break;
724	} else if (env->user_mode_only) {
725	/* if user mode only, we simulate a fake exception
726	which will be handled outside the cpu execution
727	loop */
728	#if defined(TARGET_I386)
729	do_interrupt_user(env->exception_index,
730	env->exception_is_int,
731	env->error_code,
732	env->exception_next_eip);
733	#endif
734	ret = env->exception_index;
735	break;
736	} else {
737	#if defined(TARGET_I386)
738	/* simulate a real cpu exception. On i386, it can
739	trigger new exceptions, but we do not handle
740	double or triple faults yet. */
741	do_interrupt(env->exception_index,
742	env->exception_is_int,
743	env->error_code,
744	env->exception_next_eip, 0);
745	#elif defined(TARGET_PPC)
746	do_interrupt(env);
747	#elif defined(TARGET_MIPS)
748	do_interrupt(env);
749	#elif defined(TARGET_SPARC)
750	do_interrupt(env->exception_index);
751	#elif defined(TARGET_ARM)
752	do_interrupt(env);
753	#elif defined(TARGET_SH4)
754	do_interrupt(env);
755	#endif
756	}
757	env->exception_index = -1;
758	}
759	#ifdef USE_KQEMU
760	if (kqemu_is_ok(env) && env->interrupt_request == 0) {
761	int ret;
762	env->eflags = env->eflags \| cc_table[CC_OP].compute_all() \| (DF & DF_MASK);
763	ret = kqemu_cpu_exec(env);
764	/* put eflags in CPU temporary format */
765	CC_SRC = env->eflags & (CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
766	DF = 1 - (2 * ((env->eflags >> 10) & 1));
767	CC_OP = CC_OP_EFLAGS;
768	env->eflags &= ~(DF_MASK \| CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
769	if (ret == 1) {
770	/* exception */
771	longjmp(env->jmp_env, 1);
772	} else if (ret == 2) {
773	/* softmmu execution needed */
774	} else {
775	if (env->interrupt_request != 0) {
776	/* hardware interrupt will be executed just after */
777	} else {
778	/* otherwise, we restart */
779	longjmp(env->jmp_env, 1);
780	}
781	}
782	}
783	#endif
784
785	T0 = 0; /* force lookup of first TB */
786	for(;;) {
787	#if defined(__sparc__) && !defined(HOST_SOLARIS)
788	/* g1 can be modified by some libc? functions */
789	tmp_T0 = T0;
790	#endif
791	interrupt_request = env->interrupt_request;
792	if (__builtin_expect(interrupt_request, 0)) {
793	#ifdef VBOX
794	/* Single instruction exec request, we execute it and return (one way or the other).
795	The caller will always reschedule after doing this operation! */
796	if (interrupt_request & CPU_INTERRUPT_SINGLE_INSTR)
797	{
798	/* not in flight are we? */
799	if (!(env->interrupt_request & CPU_INTERRUPT_SINGLE_INSTR_IN_FLIGHT))
800	{
801	ASMAtomicOrS32(&env->interrupt_request, CPU_INTERRUPT_SINGLE_INSTR_IN_FLIGHT);
802	env->exception_index = EXCP_SINGLE_INSTR;
803	if (emulate_single_instr(env) == -1)
804	AssertMsgFailed(("REM: emulate_single_instr failed for EIP=%RGv!!\n", env->eip));
805
806	/* When we receive an external interrupt during execution of this single
807	instruction, then we should stay here. We will leave when we're ready
808	for raw-mode or when interrupted by pending EMT requests. */
809	interrupt_request = env->interrupt_request; /* reload this! */
810	if ( !(interrupt_request & CPU_INTERRUPT_HARD)
811	\|\| !(env->eflags & IF_MASK)
812	\|\| (env->hflags & HF_INHIBIT_IRQ_MASK)
813	)
814	{
815	env->exception_index = ret = EXCP_SINGLE_INSTR;
816	cpu_loop_exit();
817	}
818	}
819	env->exception_index = EXCP_SINGLE_INSTR;
820	cpu_loop_exit();
821	}
822
823	RAWEx_ProfileStart(env, STATS_IRQ_HANDLING);
824	#endif /* VBOX */
825	#if defined(TARGET_I386)
826	if ((interrupt_request & CPU_INTERRUPT_SMI) &&
827	!(env->hflags & HF_SMM_MASK)) {
828	env->interrupt_request &= ~CPU_INTERRUPT_SMI;
829	do_smm_enter();
830	#if defined(__sparc__) && !defined(HOST_SOLARIS)
831	tmp_T0 = 0;
832	#else
833	T0 = 0;
834	#endif
835	} else if ((interrupt_request & CPU_INTERRUPT_HARD) &&
836	(env->eflags & IF_MASK) &&
837	!(env->hflags & HF_INHIBIT_IRQ_MASK)) {
838	int intno;
839	#if defined(VBOX)
840	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_HARD);
841	#else
842	env->interrupt_request &= ~CPU_INTERRUPT_HARD;
843	#endif
844	intno = cpu_get_pic_interrupt(env);
845	if (loglevel & CPU_LOG_TB_IN_ASM) {
846	fprintf(logfile, "Servicing hardware INT=0x%02x\n", intno);
847	}
848	#if defined(VBOX)
849	if (intno >= 0)
850	#endif
851	do_interrupt(intno, 0, 0, 0, 1);
852	/* ensure that no TB jump will be modified as
853	the program flow was changed */
854	#if defined(__sparc__) && !defined(HOST_SOLARIS)
855	tmp_T0 = 0;
856	#else
857	T0 = 0;
858	#endif
859	}
860	#elif defined(TARGET_PPC)
861	#if 0
862	if ((interrupt_request & CPU_INTERRUPT_RESET)) {
863	cpu_ppc_reset(env);
864	}
865	#endif
866	if (msr_ee != 0) {
867	if ((interrupt_request & CPU_INTERRUPT_HARD)) {
868	/* Raise it */
869	env->exception_index = EXCP_EXTERNAL;
870	env->error_code = 0;
871	do_interrupt(env);
872	env->interrupt_request &= ~CPU_INTERRUPT_HARD;
873	#if defined(__sparc__) && !defined(HOST_SOLARIS)
874	tmp_T0 = 0;
875	#else
876	T0 = 0;
877	#endif
878	} else if ((interrupt_request & CPU_INTERRUPT_TIMER)) {
879	/* Raise it */
880	env->exception_index = EXCP_DECR;
881	env->error_code = 0;
882	do_interrupt(env);
883	env->interrupt_request &= ~CPU_INTERRUPT_TIMER;
884	#if defined(__sparc__) && !defined(HOST_SOLARIS)
885	tmp_T0 = 0;
886	#else
887	T0 = 0;
888	#endif
889	}
890	}
891	#elif defined(TARGET_MIPS)
892	if ((interrupt_request & CPU_INTERRUPT_HARD) &&
893	(env->CP0_Status & (1 << CP0St_IE)) &&
894	(env->CP0_Status & env->CP0_Cause & 0x0000FF00) &&
895	!(env->hflags & MIPS_HFLAG_EXL) &&
896	!(env->hflags & MIPS_HFLAG_ERL) &&
897	!(env->hflags & MIPS_HFLAG_DM)) {
898	/* Raise it */
899	env->exception_index = EXCP_EXT_INTERRUPT;
900	env->error_code = 0;
901	do_interrupt(env);
902	#if defined(__sparc__) && !defined(HOST_SOLARIS)
903	tmp_T0 = 0;
904	#else
905	T0 = 0;
906	#endif
907	}
908	#elif defined(TARGET_SPARC)
909	if ((interrupt_request & CPU_INTERRUPT_HARD) &&
910	(env->psret != 0)) {
911	int pil = env->interrupt_index & 15;
912	int type = env->interrupt_index & 0xf0;
913
914	if (((type == TT_EXTINT) &&
915	(pil == 15 \|\| pil > env->psrpil)) \|\|
916	type != TT_EXTINT) {
917	env->interrupt_request &= ~CPU_INTERRUPT_HARD;
918	do_interrupt(env->interrupt_index);
919	env->interrupt_index = 0;
920	#if defined(__sparc__) && !defined(HOST_SOLARIS)
921	tmp_T0 = 0;
922	#else
923	T0 = 0;
924	#endif
925	}
926	} else if (interrupt_request & CPU_INTERRUPT_TIMER) {
927	//do_interrupt(0, 0, 0, 0, 0);
928	env->interrupt_request &= ~CPU_INTERRUPT_TIMER;
929	} else if (interrupt_request & CPU_INTERRUPT_HALT) {
930	env->interrupt_request &= ~CPU_INTERRUPT_HALT;
931	env->halted = 1;
932	env->exception_index = EXCP_HLT;
933	cpu_loop_exit();
934	}
935	#elif defined(TARGET_ARM)
936	if (interrupt_request & CPU_INTERRUPT_FIQ
937	&& !(env->uncached_cpsr & CPSR_F)) {
938	env->exception_index = EXCP_FIQ;
939	do_interrupt(env);
940	}
941	if (interrupt_request & CPU_INTERRUPT_HARD
942	&& !(env->uncached_cpsr & CPSR_I)) {
943	env->exception_index = EXCP_IRQ;
944	do_interrupt(env);
945	}
946	#elif defined(TARGET_SH4)
947	/* XXXXX */
948	#endif
949	/* Don't use the cached interupt_request value,
950	do_interrupt may have updated the EXITTB flag. */
951	if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
952	#if defined(VBOX)
953	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_EXITTB);
954	#else
955	env->interrupt_request &= ~CPU_INTERRUPT_EXITTB;
956	#endif
957	/* ensure that no TB jump will be modified as
958	the program flow was changed */
959	#if defined(__sparc__) && !defined(HOST_SOLARIS)
960	tmp_T0 = 0;
961	#else
962	T0 = 0;
963	#endif
964	}
965	#ifdef VBOX
966	RAWEx_ProfileStop(env, STATS_IRQ_HANDLING);
967	#endif
968	if (interrupt_request & CPU_INTERRUPT_EXIT) {
969	#if defined(VBOX)
970	env->exception_index = EXCP_INTERRUPT;
971	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_EXIT);
972	#else
973	env->interrupt_request &= ~CPU_INTERRUPT_EXIT;
974	env->exception_index = EXCP_INTERRUPT;
975	#endif
976	cpu_loop_exit();
977	}
978	#if defined(VBOX)
979	if (interrupt_request & CPU_INTERRUPT_RC) {
980	env->exception_index = EXCP_RC;
981	ASMAtomicAndS32(&env->interrupt_request, ~CPU_INTERRUPT_RC);
982	cpu_loop_exit();
983	}
984	#endif
985	}
986	#ifdef DEBUG_EXEC
987	if ((loglevel & CPU_LOG_TB_CPU)) {
988	#if defined(TARGET_I386)
989	/* restore flags in standard format */
990	#ifdef reg_EAX
991	env->regs[R_EAX] = EAX;
992	#endif
993	#ifdef reg_EBX
994	env->regs[R_EBX] = EBX;
995	#endif
996	#ifdef reg_ECX
997	env->regs[R_ECX] = ECX;
998	#endif
999	#ifdef reg_EDX
1000	env->regs[R_EDX] = EDX;
1001	#endif
1002	#ifdef reg_ESI
1003	env->regs[R_ESI] = ESI;
1004	#endif
1005	#ifdef reg_EDI
1006	env->regs[R_EDI] = EDI;
1007	#endif
1008	#ifdef reg_EBP
1009	env->regs[R_EBP] = EBP;
1010	#endif
1011	#ifdef reg_ESP
1012	env->regs[R_ESP] = ESP;
1013	#endif
1014	env->eflags = env->eflags \| cc_table[CC_OP].compute_all() \| (DF & DF_MASK);
1015	cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP);
1016	env->eflags &= ~(DF_MASK \| CC_O \| CC_S \| CC_Z \| CC_A \| CC_P \| CC_C);
1017	#elif defined(TARGET_ARM)
1018	cpu_dump_state(env, logfile, fprintf, 0);
1019	#elif defined(TARGET_SPARC)
1020	REGWPTR = env->regbase + (env->cwp * 16);
1021	env->regwptr = REGWPTR;
1022	cpu_dump_state(env, logfile, fprintf, 0);
1023	#elif defined(TARGET_PPC)
1024	cpu_dump_state(env, logfile, fprintf, 0);
1025	#elif defined(TARGET_M68K)
1026	cpu_m68k_flush_flags(env, env->cc_op);
1027	env->cc_op = CC_OP_FLAGS;
1028	env->sr = (env->sr & 0xffe0)
1029	\| env->cc_dest \| (env->cc_x << 4);
1030	cpu_dump_state(env, logfile, fprintf, 0);
1031	#elif defined(TARGET_MIPS)
1032	cpu_dump_state(env, logfile, fprintf, 0);
1033	#elif defined(TARGET_SH4)
1034	cpu_dump_state(env, logfile, fprintf, 0);
1035	#else
1036	#error unsupported target CPU
1037	#endif
1038	}
1039	#endif
1040	#ifdef VBOX
1041	/*
1042	* Check if we the CPU state allows us to execute the code in raw-mode.
1043	*/
1044	RAWEx_ProfileStart(env, STATS_RAW_CHECK);
1045	if (remR3CanExecuteRaw(env,
1046	env->eip + env->segs[R_CS].base,
1047	env->hflags \| (env->eflags & (IOPL_MASK \| TF_MASK \| VM_MASK))
1048	flags, &env->exception_index))
1049	{
1050	RAWEx_ProfileStop(env, STATS_RAW_CHECK);
1051	ret = env->exception_index;
1052	cpu_loop_exit();
1053	}
1054	RAWEx_ProfileStop(env, STATS_RAW_CHECK);
1055	#endif /* VBOX */
1056	tb = tb_find_fast();
1057	#ifdef DEBUG_EXEC
1058	if ((loglevel & CPU_LOG_EXEC)) {
1059	fprintf(logfile, "Trace 0x%08lx [" TARGET_FMT_lx "] %s\n",
1060	(long)tb->tc_ptr, tb->pc,
1061	lookup_symbol(tb->pc));
1062	}
1063	#endif
1064	#if defined(__sparc__) && !defined(HOST_SOLARIS)
1065	T0 = tmp_T0;
1066	#endif
1067	/* see if we can patch the calling TB. When the TB
1068	spans two pages, we cannot safely do a direct
1069	jump. */
1070	{
1071	if (T0 != 0 &&
1072	#if USE_KQEMU
1073	(env->kqemu_enabled != 2) &&
1074	#endif
1075	#ifdef VBOX
1076	!(tb->cflags & CF_RAW_MODE) &&
1077	#endif
1078	tb->page_addr[1] == -1
1079	#if defined(TARGET_I386) && defined(USE_CODE_COPY)
1080	&& (tb->cflags & CF_CODE_COPY) ==
1081	(((TranslationBlock *)(T0 & ~3))->cflags & CF_CODE_COPY)
1082	#endif
1083	) {
1084	spin_lock(&tb_lock);
1085	tb_add_jump((TranslationBlock *)(long)(T0 & ~3), T0 & 3, tb);
1086	#if defined(USE_CODE_COPY)
1087	/* propagates the FP use info */
1088	((TranslationBlock *)(T0 & ~3))->cflags \|=
1089	(tb->cflags & CF_FP_USED);
1090	#endif
1091	spin_unlock(&tb_lock);
1092	}
1093	}
1094	tc_ptr = tb->tc_ptr;
1095	env->current_tb = tb;
1096	/* execute the generated code */
1097	gen_func = (void *)tc_ptr;
1098	#if defined(__sparc__)
1099	__asm__ __volatile__("call %0\n\t"
1100	"mov %%o7,%%i0"
1101	: /* no outputs */
1102	: "r" (gen_func)
1103	: "i0", "i1", "i2", "i3", "i4", "i5",
1104	"l0", "l1", "l2", "l3", "l4", "l5",
1105	"l6", "l7");
1106	#elif defined(__arm__)
1107	asm volatile ("mov pc, %0\n\t"
1108	".global exec_loop\n\t"
1109	"exec_loop:\n\t"
1110	: /* no outputs */
1111	: "r" (gen_func)
1112	: "r1", "r2", "r3", "r8", "r9", "r10", "r12", "r14");
1113	#elif defined(TARGET_I386) && defined(USE_CODE_COPY)
1114	{
1115	if (!(tb->cflags & CF_CODE_COPY)) {
1116	if ((tb->cflags & CF_FP_USED) && env->native_fp_regs) {
1117	save_native_fp_state(env);
1118	}
1119	gen_func();
1120	} else {
1121	if ((tb->cflags & CF_FP_USED) && !env->native_fp_regs) {
1122	restore_native_fp_state(env);
1123	}
1124	/* we work with native eflags */
1125	CC_SRC = cc_table[CC_OP].compute_all();
1126	CC_OP = CC_OP_EFLAGS;
1127	asm(".globl exec_loop\n"
1128	"\n"
1129	"debug1:\n"
1130	" pushl %%ebp\n"
1131	" fs movl %10, %9\n"
1132	" fs movl %11, %%eax\n"
1133	" andl $0x400, %%eax\n"
1134	" fs orl %8, %%eax\n"
1135	" pushl %%eax\n"
1136	" popf\n"
1137	" fs movl %%esp, %12\n"
1138	" fs movl %0, %%eax\n"
1139	" fs movl %1, %%ecx\n"
1140	" fs movl %2, %%edx\n"
1141	" fs movl %3, %%ebx\n"
1142	" fs movl %4, %%esp\n"
1143	" fs movl %5, %%ebp\n"
1144	" fs movl %6, %%esi\n"
1145	" fs movl %7, %%edi\n"
1146	" fs jmp *%9\n"
1147	"exec_loop:\n"
1148	" fs movl %%esp, %4\n"
1149	" fs movl %12, %%esp\n"
1150	" fs movl %%eax, %0\n"
1151	" fs movl %%ecx, %1\n"
1152	" fs movl %%edx, %2\n"
1153	" fs movl %%ebx, %3\n"
1154	" fs movl %%ebp, %5\n"
1155	" fs movl %%esi, %6\n"
1156	" fs movl %%edi, %7\n"
1157	" pushf\n"
1158	" popl %%eax\n"
1159	" movl %%eax, %%ecx\n"
1160	" andl $0x400, %%ecx\n"
1161	" shrl $9, %%ecx\n"
1162	" andl $0x8d5, %%eax\n"
1163	" fs movl %%eax, %8\n"
1164	" movl $1, %%eax\n"
1165	" subl %%ecx, %%eax\n"
1166	" fs movl %%eax, %11\n"
1167	" fs movl %9, %%ebx\n" /* get T0 value */
1168	" popl %%ebp\n"
1169	:
1170	: "m" ((uint8_t )offsetof(CPUState, regs[0])),
1171	"m" ((uint8_t )offsetof(CPUState, regs[1])),
1172	"m" ((uint8_t )offsetof(CPUState, regs[2])),
1173	"m" ((uint8_t )offsetof(CPUState, regs[3])),
1174	"m" ((uint8_t )offsetof(CPUState, regs[4])),
1175	"m" ((uint8_t )offsetof(CPUState, regs[5])),
1176	"m" ((uint8_t )offsetof(CPUState, regs[6])),
1177	"m" ((uint8_t )offsetof(CPUState, regs[7])),
1178	"m" ((uint8_t )offsetof(CPUState, cc_src)),
1179	"m" ((uint8_t )offsetof(CPUState, tmp0)),
1180	"a" (gen_func),
1181	"m" ((uint8_t )offsetof(CPUState, df)),
1182	"m" ((uint8_t )offsetof(CPUState, saved_esp))
1183	: "%ecx", "%edx"
1184	);
1185	}
1186	}
1187	#elif defined(__ia64)
1188	struct fptr {
1189	void *ip;
1190	void *gp;
1191	} fp;
1192
1193	fp.ip = tc_ptr;
1194	fp.gp = code_gen_buffer + 2 * (1 << 20);
1195	((void ()(void)) &fp)();
1196	#else
1197	#if defined(DEBUG) && defined(VBOX) && !defined(DEBUG_dmik)
1198	#if !defined(DEBUG_bird)
1199	if (((env->hflags >> HF_CPL_SHIFT) & 3) == 0 && (env->hflags & HF_PE_MASK) && (env->cr[0] & CR0_PG_MASK))
1200	{
1201	if(!(env->state & CPU_EMULATE_SINGLE_STEP))
1202	{
1203	Log(("EMR0: %RGv 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));
1204	}
1205	}
1206	else
1207	if (((env->hflags >> HF_CPL_SHIFT) & 3) == 3 && (env->hflags & HF_PE_MASK) && (env->cr[0] & CR0_PG_MASK))
1208	{
1209	if(!(env->state & CPU_EMULATE_SINGLE_STEP))
1210	{
1211	if(env->eflags & VM_MASK)
1212	{
1213	Log(("EMV86: %RGv IF=%d TF=%d CPL=%d flags=%08X CR0=%RGr\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]));
1214	}
1215	else
1216	{
1217	Log(("EMR3: %RGv IF=%d TF=%d CPL=%d IOPL=%d flags=%08X CR0=%RGr\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]));
1218	}
1219	}
1220	}
1221	#endif /* !DEBUG_bird */
1222	if(env->state & CPU_EMULATE_SINGLE_STEP)
1223	{
1224	#ifdef DEBUG_bird
1225	static int s_cTimes = 0;
1226	if (s_cTimes++ > 1000000) /* 1 million */
1227	{
1228	RTLogPrintf("Enough stepping!\n");
1229	#if 0
1230	env->exception_index = EXCP_DEBUG;
1231	cpu_loop_exit();
1232	#else
1233	env->state &= ~CPU_EMULATE_SINGLE_STEP;
1234	#endif
1235	}
1236	#endif
1237	TMCpuTickPause(env->pVM);
1238	remR3DisasInstr(env, -1, NULL);
1239	TMCpuTickResume(env->pVM);
1240	if(emulate_single_instr(env) == -1)
1241	{
1242	printf("emulate_single_instr failed for EIP=%RGv!!\n", env->eip);
1243	}
1244	}
1245	else
1246	{
1247	RAWEx_ProfileStart(env, STATS_QEMU_RUN_EMULATED_CODE);
1248	gen_func();
1249	RAWEx_ProfileStop(env, STATS_QEMU_RUN_EMULATED_CODE);
1250	}
1251	#else /* !DEBUG \|\| !VBOX \|\| DEBUG_dmik */
1252
1253	#ifdef VBOX
1254	RAWEx_ProfileStart(env, STATS_QEMU_RUN_EMULATED_CODE);
1255	gen_func();
1256	RAWEx_ProfileStop(env, STATS_QEMU_RUN_EMULATED_CODE);
1257	#else /* !VBOX */
1258	gen_func();
1259	#endif /* !VBOX */
1260
1261	#endif /* !DEBUG \|\| !VBOX \|\| DEBUG_dmik */
1262	#endif
1263	env->current_tb = NULL;
1264	/* reset soft MMU for next block (it can currently
1265	only be set by a memory fault) */
1266	#if defined(TARGET_I386) && !defined(CONFIG_SOFTMMU)
1267	if (env->hflags & HF_SOFTMMU_MASK) {
1268	env->hflags &= ~HF_SOFTMMU_MASK;
1269	/* do not allow linking to another block */
1270	T0 = 0;
1271	}
1272	#endif
1273	#if defined(USE_KQEMU)
1274	#define MIN_CYCLE_BEFORE_SWITCH (100 * 1000)
1275	if (kqemu_is_ok(env) &&
1276	(cpu_get_time_fast() - env->last_io_time) >= MIN_CYCLE_BEFORE_SWITCH) {
1277	cpu_loop_exit();
1278	}
1279	#endif
1280	}
1281	} else {
1282	env_to_regs();
1283	}
1284	} /* for(;;) */
1285
1286
1287	#if defined(TARGET_I386)
1288	#if defined(USE_CODE_COPY)
1289	if (env->native_fp_regs) {
1290	save_native_fp_state(env);
1291	}
1292	#endif
1293	/* restore flags in standard format */
1294	env->eflags = env->eflags \| cc_table[CC_OP].compute_all() \| (DF & DF_MASK);
1295	#elif defined(TARGET_ARM)
1296	/* XXX: Save/restore host fpu exception state?. */
1297	#elif defined(TARGET_SPARC)
1298	#if defined(reg_REGWPTR)
1299	REGWPTR = saved_regwptr;
1300	#endif
1301	#elif defined(TARGET_PPC)
1302	#elif defined(TARGET_M68K)
1303	cpu_m68k_flush_flags(env, env->cc_op);
1304	env->cc_op = CC_OP_FLAGS;
1305	env->sr = (env->sr & 0xffe0)
1306	\| env->cc_dest \| (env->cc_x << 4);
1307	#elif defined(TARGET_MIPS)
1308	#elif defined(TARGET_SH4)
1309	/* XXXXX */
1310	#else
1311	#error unsupported target CPU
1312	#endif
1313	#if defined(__sparc__) && !defined(HOST_SOLARIS)
1314	asm volatile ("mov %0, %%i7" : : "r" (saved_i7));
1315	#endif
1316	#include "hostregs_helper.h"
1317
1318	/* fail safe : never use cpu_single_env outside cpu_exec() */
1319	cpu_single_env = NULL;
1320	return ret;
1321	}
1322
1323	#endif /* !VBOX */
1324
1325	/* must only be called from the generated code as an exception can be
1326	generated */
1327	void tb_invalidate_page_range(target_ulong start, target_ulong end)
1328	{
1329	/* XXX: cannot enable it yet because it yields to MMU exception
1330	where NIP != read address on PowerPC */
1331	#if 0
1332	target_ulong phys_addr;
1333	phys_addr = get_phys_addr_code(env, start);
1334	tb_invalidate_phys_page_range(phys_addr, phys_addr + end - start, 0);
1335	#endif
1336	}
1337
1338	#if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
1339
1340	void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector)
1341	{
1342	CPUX86State *saved_env;
1343
1344	saved_env = env;
1345	env = s;
1346	if (!(env->cr[0] & CR0_PE_MASK) \|\| (env->eflags & VM_MASK)) {
1347	selector &= 0xffff;
1348	cpu_x86_load_seg_cache(env, seg_reg, selector,
1349	(selector << 4), 0xffff, 0);
1350	} else {
1351	load_seg(seg_reg, selector);
1352	}
1353	env = saved_env;
1354	}
1355
1356	void cpu_x86_fsave(CPUX86State s, uint8_t ptr, int data32)
1357	{
1358	CPUX86State *saved_env;
1359
1360	saved_env = env;
1361	env = s;
1362
1363	helper_fsave((target_ulong)ptr, data32);
1364
1365	env = saved_env;
1366	}
1367
1368	void cpu_x86_frstor(CPUX86State s, uint8_t ptr, int data32)
1369	{
1370	CPUX86State *saved_env;
1371
1372	saved_env = env;
1373	env = s;
1374
1375	helper_frstor((target_ulong)ptr, data32);
1376
1377	env = saved_env;
1378	}
1379
1380	#endif /* TARGET_I386 */
1381
1382	#if !defined(CONFIG_SOFTMMU)
1383
1384	#if defined(TARGET_I386)
1385
1386	/* 'pc' is the host PC at which the exception was raised. 'address' is
1387	the effective address of the memory exception. 'is_write' is 1 if a
1388	write caused the exception and otherwise 0'. 'old_set' is the
1389	signal set which should be restored */
1390	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1391	int is_write, sigset_t *old_set,
1392	void *puc)
1393	{
1394	TranslationBlock *tb;
1395	int ret;
1396
1397	if (cpu_single_env)
1398	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1399	#if defined(DEBUG_SIGNAL)
1400	qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1401	pc, address, is_write, (unsigned long )old_set);
1402	#endif
1403	/* XXX: locking issue */
1404	if (is_write && page_unprotect(h2g(address), pc, puc)) {
1405	return 1;
1406	}
1407
1408	/* see if it is an MMU fault */
1409	ret = cpu_x86_handle_mmu_fault(env, address, is_write,
1410	((env->hflags & HF_CPL_MASK) == 3), 0);
1411	if (ret < 0)
1412	return 0; /* not an MMU fault */
1413	if (ret == 0)
1414	return 1; /* the MMU fault was handled without causing real CPU fault */
1415	/* now we have a real cpu fault */
1416	tb = tb_find_pc(pc);
1417	if (tb) {
1418	/* the PC is inside the translated code. It means that we have
1419	a virtual CPU fault */
1420	cpu_restore_state(tb, env, pc, puc);
1421	}
1422	if (ret == 1) {
1423	#if 0
1424	printf("PF exception: EIP=0x%RGv CR2=0x%RGv error=0x%x\n",
1425	env->eip, env->cr[2], env->error_code);
1426	#endif
1427	/* we restore the process signal mask as the sigreturn should
1428	do it (XXX: use sigsetjmp) */
1429	sigprocmask(SIG_SETMASK, old_set, NULL);
1430	raise_exception_err(env->exception_index, env->error_code);
1431	} else {
1432	/* activate soft MMU for this block */
1433	env->hflags \|= HF_SOFTMMU_MASK;
1434	cpu_resume_from_signal(env, puc);
1435	}
1436	/* never comes here */
1437	return 1;
1438	}
1439
1440	#elif defined(TARGET_ARM)
1441	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1442	int is_write, sigset_t *old_set,
1443	void *puc)
1444	{
1445	TranslationBlock *tb;
1446	int ret;
1447
1448	if (cpu_single_env)
1449	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1450	#if defined(DEBUG_SIGNAL)
1451	printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1452	pc, address, is_write, (unsigned long )old_set);
1453	#endif
1454	/* XXX: locking issue */
1455	if (is_write && page_unprotect(h2g(address), pc, puc)) {
1456	return 1;
1457	}
1458	/* see if it is an MMU fault */
1459	ret = cpu_arm_handle_mmu_fault(env, address, is_write, 1, 0);
1460	if (ret < 0)
1461	return 0; /* not an MMU fault */
1462	if (ret == 0)
1463	return 1; /* the MMU fault was handled without causing real CPU fault */
1464	/* now we have a real cpu fault */
1465	tb = tb_find_pc(pc);
1466	if (tb) {
1467	/* the PC is inside the translated code. It means that we have
1468	a virtual CPU fault */
1469	cpu_restore_state(tb, env, pc, puc);
1470	}
1471	/* we restore the process signal mask as the sigreturn should
1472	do it (XXX: use sigsetjmp) */
1473	sigprocmask(SIG_SETMASK, old_set, NULL);
1474	cpu_loop_exit();
1475	}
1476	#elif defined(TARGET_SPARC)
1477	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1478	int is_write, sigset_t *old_set,
1479	void *puc)
1480	{
1481	TranslationBlock *tb;
1482	int ret;
1483
1484	if (cpu_single_env)
1485	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1486	#if defined(DEBUG_SIGNAL)
1487	printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1488	pc, address, is_write, (unsigned long )old_set);
1489	#endif
1490	/* XXX: locking issue */
1491	if (is_write && page_unprotect(h2g(address), pc, puc)) {
1492	return 1;
1493	}
1494	/* see if it is an MMU fault */
1495	ret = cpu_sparc_handle_mmu_fault(env, address, is_write, 1, 0);
1496	if (ret < 0)
1497	return 0; /* not an MMU fault */
1498	if (ret == 0)
1499	return 1; /* the MMU fault was handled without causing real CPU fault */
1500	/* now we have a real cpu fault */
1501	tb = tb_find_pc(pc);
1502	if (tb) {
1503	/* the PC is inside the translated code. It means that we have
1504	a virtual CPU fault */
1505	cpu_restore_state(tb, env, pc, puc);
1506	}
1507	/* we restore the process signal mask as the sigreturn should
1508	do it (XXX: use sigsetjmp) */
1509	sigprocmask(SIG_SETMASK, old_set, NULL);
1510	cpu_loop_exit();
1511	}
1512	#elif defined (TARGET_PPC)
1513	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1514	int is_write, sigset_t *old_set,
1515	void *puc)
1516	{
1517	TranslationBlock *tb;
1518	int ret;
1519
1520	if (cpu_single_env)
1521	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1522	#if defined(DEBUG_SIGNAL)
1523	printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1524	pc, address, is_write, (unsigned long )old_set);
1525	#endif
1526	/* XXX: locking issue */
1527	if (is_write && page_unprotect(h2g(address), pc, puc)) {
1528	return 1;
1529	}
1530
1531	/* see if it is an MMU fault */
1532	ret = cpu_ppc_handle_mmu_fault(env, address, is_write, msr_pr, 0);
1533	if (ret < 0)
1534	return 0; /* not an MMU fault */
1535	if (ret == 0)
1536	return 1; /* the MMU fault was handled without causing real CPU fault */
1537
1538	/* now we have a real cpu fault */
1539	tb = tb_find_pc(pc);
1540	if (tb) {
1541	/* the PC is inside the translated code. It means that we have
1542	a virtual CPU fault */
1543	cpu_restore_state(tb, env, pc, puc);
1544	}
1545	if (ret == 1) {
1546	#if 0
1547	printf("PF exception: NIP=0x%08x error=0x%x %p\n",
1548	env->nip, env->error_code, tb);
1549	#endif
1550	/* we restore the process signal mask as the sigreturn should
1551	do it (XXX: use sigsetjmp) */
1552	sigprocmask(SIG_SETMASK, old_set, NULL);
1553	do_raise_exception_err(env->exception_index, env->error_code);
1554	} else {
1555	/* activate soft MMU for this block */
1556	cpu_resume_from_signal(env, puc);
1557	}
1558	/* never comes here */
1559	return 1;
1560	}
1561
1562	#elif defined(TARGET_M68K)
1563	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1564	int is_write, sigset_t *old_set,
1565	void *puc)
1566	{
1567	TranslationBlock *tb;
1568	int ret;
1569
1570	if (cpu_single_env)
1571	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1572	#if defined(DEBUG_SIGNAL)
1573	printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1574	pc, address, is_write, (unsigned long )old_set);
1575	#endif
1576	/* XXX: locking issue */
1577	if (is_write && page_unprotect(address, pc, puc)) {
1578	return 1;
1579	}
1580	/* see if it is an MMU fault */
1581	ret = cpu_m68k_handle_mmu_fault(env, address, is_write, 1, 0);
1582	if (ret < 0)
1583	return 0; /* not an MMU fault */
1584	if (ret == 0)
1585	return 1; /* the MMU fault was handled without causing real CPU fault */
1586	/* now we have a real cpu fault */
1587	tb = tb_find_pc(pc);
1588	if (tb) {
1589	/* the PC is inside the translated code. It means that we have
1590	a virtual CPU fault */
1591	cpu_restore_state(tb, env, pc, puc);
1592	}
1593	/* we restore the process signal mask as the sigreturn should
1594	do it (XXX: use sigsetjmp) */
1595	sigprocmask(SIG_SETMASK, old_set, NULL);
1596	cpu_loop_exit();
1597	/* never comes here */
1598	return 1;
1599	}
1600
1601	#elif defined (TARGET_MIPS)
1602	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1603	int is_write, sigset_t *old_set,
1604	void *puc)
1605	{
1606	TranslationBlock *tb;
1607	int ret;
1608
1609	if (cpu_single_env)
1610	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1611	#if defined(DEBUG_SIGNAL)
1612	printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1613	pc, address, is_write, (unsigned long )old_set);
1614	#endif
1615	/* XXX: locking issue */
1616	if (is_write && page_unprotect(h2g(address), pc, puc)) {
1617	return 1;
1618	}
1619
1620	/* see if it is an MMU fault */
1621	ret = cpu_mips_handle_mmu_fault(env, address, is_write, 1, 0);
1622	if (ret < 0)
1623	return 0; /* not an MMU fault */
1624	if (ret == 0)
1625	return 1; /* the MMU fault was handled without causing real CPU fault */
1626
1627	/* now we have a real cpu fault */
1628	tb = tb_find_pc(pc);
1629	if (tb) {
1630	/* the PC is inside the translated code. It means that we have
1631	a virtual CPU fault */
1632	cpu_restore_state(tb, env, pc, puc);
1633	}
1634	if (ret == 1) {
1635	#if 0
1636	printf("PF exception: NIP=0x%08x error=0x%x %p\n",
1637	env->nip, env->error_code, tb);
1638	#endif
1639	/* we restore the process signal mask as the sigreturn should
1640	do it (XXX: use sigsetjmp) */
1641	sigprocmask(SIG_SETMASK, old_set, NULL);
1642	do_raise_exception_err(env->exception_index, env->error_code);
1643	} else {
1644	/* activate soft MMU for this block */
1645	cpu_resume_from_signal(env, puc);
1646	}
1647	/* never comes here */
1648	return 1;
1649	}
1650
1651	#elif defined (TARGET_SH4)
1652	static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1653	int is_write, sigset_t *old_set,
1654	void *puc)
1655	{
1656	TranslationBlock *tb;
1657	int ret;
1658
1659	if (cpu_single_env)
1660	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1661	#if defined(DEBUG_SIGNAL)
1662	printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1663	pc, address, is_write, (unsigned long )old_set);
1664	#endif
1665	/* XXX: locking issue */
1666	if (is_write && page_unprotect(h2g(address), pc, puc)) {
1667	return 1;
1668	}
1669
1670	/* see if it is an MMU fault */
1671	ret = cpu_sh4_handle_mmu_fault(env, address, is_write, 1, 0);
1672	if (ret < 0)
1673	return 0; /* not an MMU fault */
1674	if (ret == 0)
1675	return 1; /* the MMU fault was handled without causing real CPU fault */
1676
1677	/* now we have a real cpu fault */
1678	tb = tb_find_pc(pc);
1679	if (tb) {
1680	/* the PC is inside the translated code. It means that we have
1681	a virtual CPU fault */
1682	cpu_restore_state(tb, env, pc, puc);
1683	}
1684	#if 0
1685	printf("PF exception: NIP=0x%08x error=0x%x %p\n",
1686	env->nip, env->error_code, tb);
1687	#endif
1688	/* we restore the process signal mask as the sigreturn should
1689	do it (XXX: use sigsetjmp) */
1690	sigprocmask(SIG_SETMASK, old_set, NULL);
1691	cpu_loop_exit();
1692	/* never comes here */
1693	return 1;
1694	}
1695	#else
1696	#error unsupported target CPU
1697	#endif
1698
1699	#if defined(__i386__)
1700
1701	#if defined(USE_CODE_COPY)
1702	static void cpu_send_trap(unsigned long pc, int trap,
1703	struct ucontext *uc)
1704	{
1705	TranslationBlock *tb;
1706
1707	if (cpu_single_env)
1708	env = cpu_single_env; /* XXX: find a correct solution for multithread */
1709	/* now we have a real cpu fault */
1710	tb = tb_find_pc(pc);
1711	if (tb) {
1712	/* the PC is inside the translated code. It means that we have
1713	a virtual CPU fault */
1714	cpu_restore_state(tb, env, pc, uc);
1715	}
1716	sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
1717	raise_exception_err(trap, env->error_code);
1718	}
1719	#endif
1720
1721	int cpu_signal_handler(int host_signum, void *pinfo,
1722	void *puc)
1723	{
1724	siginfo_t *info = pinfo;
1725	struct ucontext *uc = puc;
1726	unsigned long pc;
1727	int trapno;
1728
1729	#ifndef REG_EIP
1730	/* for glibc 2.1 */
1731	#define REG_EIP EIP
1732	#define REG_ERR ERR
1733	#define REG_TRAPNO TRAPNO
1734	#endif
1735	pc = uc->uc_mcontext.gregs[REG_EIP];
1736	trapno = uc->uc_mcontext.gregs[REG_TRAPNO];
1737	#if defined(TARGET_I386) && defined(USE_CODE_COPY)
1738	if (trapno == 0x00 \|\| trapno == 0x05) {
1739	/* send division by zero or bound exception */
1740	cpu_send_trap(pc, trapno, uc);
1741	return 1;
1742	} else
1743	#endif
1744	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1745	trapno == 0xe ?
1746	(uc->uc_mcontext.gregs[REG_ERR] >> 1) & 1 : 0,
1747	&uc->uc_sigmask, puc);
1748	}
1749
1750	#elif defined(__x86_64__)
1751
1752	int cpu_signal_handler(int host_signum, void *pinfo,
1753	void *puc)
1754	{
1755	siginfo_t *info = pinfo;
1756	struct ucontext *uc = puc;
1757	unsigned long pc;
1758
1759	pc = uc->uc_mcontext.gregs[REG_RIP];
1760	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1761	uc->uc_mcontext.gregs[REG_TRAPNO] == 0xe ?
1762	(uc->uc_mcontext.gregs[REG_ERR] >> 1) & 1 : 0,
1763	&uc->uc_sigmask, puc);
1764	}
1765
1766	#elif defined(__powerpc__)
1767
1768	/***********************************************************************
1769	* signal context platform-specific definitions
1770	* From Wine
1771	*/
1772	#ifdef linux
1773	/* All Registers access - only for local access */
1774	# define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
1775	/* Gpr Registers access */
1776	# define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
1777	# define IAR_sig(context) REG_sig(nip, context) /* Program counter */
1778	# define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */
1779	# define CTR_sig(context) REG_sig(ctr, context) /* Count register */
1780	# define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */
1781	# define LR_sig(context) REG_sig(link, context) /* Link register */
1782	# define CR_sig(context) REG_sig(ccr, context) /* Condition register */
1783	/* Float Registers access */
1784	# define FLOAT_sig(reg_num, context) (((double)((char)((context)->uc_mcontext.regs+48*4)))[reg_num])
1785	# define FPSCR_sig(context) ((int)((char)((context)->uc_mcontext.regs+(48+322)*4)))
1786	/* Exception Registers access */
1787	# define DAR_sig(context) REG_sig(dar, context)
1788	# define DSISR_sig(context) REG_sig(dsisr, context)
1789	# define TRAP_sig(context) REG_sig(trap, context)
1790	#endif /* linux */
1791
1792	#ifdef __APPLE__
1793	# include <sys/ucontext.h>
1794	typedef struct ucontext SIGCONTEXT;
1795	/* All Registers access - only for local access */
1796	# define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
1797	# define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
1798	# define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
1799	# define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
1800	/* Gpr Registers access */
1801	# define GPR_sig(reg_num, context) REG_sig(r##reg_num, context)
1802	# define IAR_sig(context) REG_sig(srr0, context) /* Program counter */
1803	# define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */
1804	# define CTR_sig(context) REG_sig(ctr, context)
1805	# define XER_sig(context) REG_sig(xer, context) /* Link register */
1806	# define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */
1807	# define CR_sig(context) REG_sig(cr, context) /* Condition register */
1808	/* Float Registers access */
1809	# define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
1810	# define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context))
1811	/* Exception Registers access */
1812	# define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */
1813	# define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
1814	# define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
1815	#endif /* __APPLE__ */
1816
1817	int cpu_signal_handler(int host_signum, void *pinfo,
1818	void *puc)
1819	{
1820	siginfo_t *info = pinfo;
1821	struct ucontext *uc = puc;
1822	unsigned long pc;
1823	int is_write;
1824
1825	pc = IAR_sig(uc);
1826	is_write = 0;
1827	#if 0
1828	/* ppc 4xx case */
1829	if (DSISR_sig(uc) & 0x00800000)
1830	is_write = 1;
1831	#else
1832	if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000))
1833	is_write = 1;
1834	#endif
1835	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1836	is_write, &uc->uc_sigmask, puc);
1837	}
1838
1839	#elif defined(__alpha__)
1840
1841	int cpu_signal_handler(int host_signum, void *pinfo,
1842	void *puc)
1843	{
1844	siginfo_t *info = pinfo;
1845	struct ucontext *uc = puc;
1846	uint32_t *pc = uc->uc_mcontext.sc_pc;
1847	uint32_t insn = *pc;
1848	int is_write = 0;
1849
1850	/* XXX: need kernel patch to get write flag faster */
1851	switch (insn >> 26) {
1852	case 0x0d: // stw
1853	case 0x0e: // stb
1854	case 0x0f: // stq_u
1855	case 0x24: // stf
1856	case 0x25: // stg
1857	case 0x26: // sts
1858	case 0x27: // stt
1859	case 0x2c: // stl
1860	case 0x2d: // stq
1861	case 0x2e: // stl_c
1862	case 0x2f: // stq_c
1863	is_write = 1;
1864	}
1865
1866	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1867	is_write, &uc->uc_sigmask, puc);
1868	}
1869	#elif defined(__sparc__)
1870
1871	int cpu_signal_handler(int host_signum, void *pinfo,
1872	void *puc)
1873	{
1874	siginfo_t *info = pinfo;
1875	uint32_t regs = (uint32_t )(info + 1);
1876	void *sigmask = (regs + 20);
1877	unsigned long pc;
1878	int is_write;
1879	uint32_t insn;
1880
1881	/* XXX: is there a standard glibc define ? */
1882	pc = regs[1];
1883	/* XXX: need kernel patch to get write flag faster */
1884	is_write = 0;
1885	insn = (uint32_t )pc;
1886	if ((insn >> 30) == 3) {
1887	switch((insn >> 19) & 0x3f) {
1888	case 0x05: // stb
1889	case 0x06: // sth
1890	case 0x04: // st
1891	case 0x07: // std
1892	case 0x24: // stf
1893	case 0x27: // stdf
1894	case 0x25: // stfsr
1895	is_write = 1;
1896	break;
1897	}
1898	}
1899	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1900	is_write, sigmask, NULL);
1901	}
1902
1903	#elif defined(__arm__)
1904
1905	int cpu_signal_handler(int host_signum, void *pinfo,
1906	void *puc)
1907	{
1908	siginfo_t *info = pinfo;
1909	struct ucontext *uc = puc;
1910	unsigned long pc;
1911	int is_write;
1912
1913	pc = uc->uc_mcontext.gregs[R15];
1914	/* XXX: compute is_write */
1915	is_write = 0;
1916	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1917	is_write,
1918	&uc->uc_sigmask, puc);
1919	}
1920
1921	#elif defined(__mc68000)
1922
1923	int cpu_signal_handler(int host_signum, void *pinfo,
1924	void *puc)
1925	{
1926	siginfo_t *info = pinfo;
1927	struct ucontext *uc = puc;
1928	unsigned long pc;
1929	int is_write;
1930
1931	pc = uc->uc_mcontext.gregs[16];
1932	/* XXX: compute is_write */
1933	is_write = 0;
1934	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1935	is_write,
1936	&uc->uc_sigmask, puc);
1937	}
1938
1939	#elif defined(__ia64)
1940
1941	#ifndef __ISR_VALID
1942	/* This ought to be in <bits/siginfo.h>... */
1943	# define __ISR_VALID 1
1944	#endif
1945
1946	int cpu_signal_handler(int host_signum, void pinfo, void puc)
1947	{
1948	siginfo_t *info = pinfo;
1949	struct ucontext *uc = puc;
1950	unsigned long ip;
1951	int is_write = 0;
1952
1953	ip = uc->uc_mcontext.sc_ip;
1954	switch (host_signum) {
1955	case SIGILL:
1956	case SIGFPE:
1957	case SIGSEGV:
1958	case SIGBUS:
1959	case SIGTRAP:
1960	if (info->si_code && (info->si_segvflags & __ISR_VALID))
1961	/* ISR.W (write-access) is bit 33: */
1962	is_write = (info->si_isr >> 33) & 1;
1963	break;
1964
1965	default:
1966	break;
1967	}
1968	return handle_cpu_signal(ip, (unsigned long)info->si_addr,
1969	is_write,
1970	&uc->uc_sigmask, puc);
1971	}
1972
1973	#elif defined(__s390__)
1974
1975	int cpu_signal_handler(int host_signum, void *pinfo,
1976	void *puc)
1977	{
1978	siginfo_t *info = pinfo;
1979	struct ucontext *uc = puc;
1980	unsigned long pc;
1981	int is_write;
1982
1983	pc = uc->uc_mcontext.psw.addr;
1984	/* XXX: compute is_write */
1985	is_write = 0;
1986	return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1987	is_write,
1988	&uc->uc_sigmask, puc);
1989	}
1990
1991	#else
1992
1993	#error host CPU specific signal handler needed
1994
1995	#endif
1996
1997	#endif /* !defined(CONFIG_SOFTMMU) */

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