VirtualBox

source: vbox/trunk/src/recompiler/target-i386/cpu.h@ 2870

Last change on this file since 2870 was 2422, checked in by vboxsync, 18 years ago

Removed the old recompiler code.
  • Property svn:eol-style set to native
File size: 21.2 KB
Line 
1/*
2 * i386 virtual CPU header
3 *
4 * Copyright (c) 2003 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#ifndef CPU_I386_H
21#define CPU_I386_H
22
23#include "config.h"
24
25#ifdef TARGET_X86_64
26#define TARGET_LONG_BITS 64
27#else
28#define TARGET_LONG_BITS 32
29#endif
30
31/* target supports implicit self modifying code */
32#define TARGET_HAS_SMC
33/* support for self modifying code even if the modified instruction is
34 close to the modifying instruction */
35#define TARGET_HAS_PRECISE_SMC
36
37#define TARGET_HAS_ICE 1
38
39#ifdef TARGET_X86_64
40#define ELF_MACHINE EM_X86_64
41#else
42#define ELF_MACHINE EM_386
43#endif
44
45#include "cpu-defs.h"
46
47#include "softfloat.h"
48
49#if defined(VBOX)
50# include <iprt/critsect.h>
51# include <iprt/thread.h>
52# include <iprt/assert.h>
53# include <iprt/asm.h>
54# include <VBox/vmm.h>
55#endif /* VBOX */
56
57#if defined(__i386__) && !defined(CONFIG_SOFTMMU)
58#define USE_CODE_COPY
59#endif
60
61#define R_EAX 0
62#define R_ECX 1
63#define R_EDX 2
64#define R_EBX 3
65#define R_ESP 4
66#define R_EBP 5
67#define R_ESI 6
68#define R_EDI 7
69
70#define R_AL 0
71#define R_CL 1
72#define R_DL 2
73#define R_BL 3
74#define R_AH 4
75#define R_CH 5
76#define R_DH 6
77#define R_BH 7
78
79#define R_ES 0
80#define R_CS 1
81#define R_SS 2
82#define R_DS 3
83#define R_FS 4
84#define R_GS 5
85
86/* segment descriptor fields */
87#define DESC_G_MASK (1 << 23)
88#define DESC_B_SHIFT 22
89#define DESC_B_MASK (1 << DESC_B_SHIFT)
90#define DESC_L_SHIFT 21 /* x86_64 only : 64 bit code segment */
91#define DESC_L_MASK (1 << DESC_L_SHIFT)
92#define DESC_AVL_MASK (1 << 20)
93#define DESC_P_MASK (1 << 15)
94#define DESC_DPL_SHIFT 13
95#define DESC_S_MASK (1 << 12)
96#define DESC_TYPE_SHIFT 8
97#define DESC_A_MASK (1 << 8)
98
99#define DESC_CS_MASK (1 << 11) /* 1=code segment 0=data segment */
100#define DESC_C_MASK (1 << 10) /* code: conforming */
101#define DESC_R_MASK (1 << 9) /* code: readable */
102
103#define DESC_E_MASK (1 << 10) /* data: expansion direction */
104#define DESC_W_MASK (1 << 9) /* data: writable */
105
106#define DESC_TSS_BUSY_MASK (1 << 9)
107
108/* eflags masks */
109#define CC_C 0x0001
110#define CC_P 0x0004
111#define CC_A 0x0010
112#define CC_Z 0x0040
113#define CC_S 0x0080
114#define CC_O 0x0800
115
116#define TF_SHIFT 8
117#define IOPL_SHIFT 12
118#define VM_SHIFT 17
119
120#define TF_MASK 0x00000100
121#define IF_MASK 0x00000200
122#define DF_MASK 0x00000400
123#define IOPL_MASK 0x00003000
124#define NT_MASK 0x00004000
125#define RF_MASK 0x00010000
126#define VM_MASK 0x00020000
127#define AC_MASK 0x00040000
128#define VIF_MASK 0x00080000
129#define VIP_MASK 0x00100000
130#define ID_MASK 0x00200000
131
132/* hidden flags - used internally by qemu to represent additionnal cpu
133 states. Only the CPL, INHIBIT_IRQ and HALTED are not redundant. We avoid
134 using the IOPL_MASK, TF_MASK and VM_MASK bit position to ease oring
135 with eflags. */
136/* current cpl */
137#define HF_CPL_SHIFT 0
138/* true if soft mmu is being used */
139#define HF_SOFTMMU_SHIFT 2
140/* true if hardware interrupts must be disabled for next instruction */
141#define HF_INHIBIT_IRQ_SHIFT 3
142/* 16 or 32 segments */
143#define HF_CS32_SHIFT 4
144#define HF_SS32_SHIFT 5
145/* zero base for DS, ES and SS : can be '0' only in 32 bit CS segment */
146#define HF_ADDSEG_SHIFT 6
147/* copy of CR0.PE (protected mode) */
148#define HF_PE_SHIFT 7
149#define HF_TF_SHIFT 8 /* must be same as eflags */
150#define HF_MP_SHIFT 9 /* the order must be MP, EM, TS */
151#define HF_EM_SHIFT 10
152#define HF_TS_SHIFT 11
153#define HF_IOPL_SHIFT 12 /* must be same as eflags */
154#define HF_LMA_SHIFT 14 /* only used on x86_64: long mode active */
155#define HF_CS64_SHIFT 15 /* only used on x86_64: 64 bit code segment */
156#define HF_OSFXSR_SHIFT 16 /* CR4.OSFXSR */
157#define HF_VM_SHIFT 17 /* must be same as eflags */
158#define HF_HALTED_SHIFT 18 /* CPU halted */
159#define HF_SMM_SHIFT 19 /* CPU in SMM mode */
160
161#define HF_CPL_MASK (3 << HF_CPL_SHIFT)
162#define HF_SOFTMMU_MASK (1 << HF_SOFTMMU_SHIFT)
163#define HF_INHIBIT_IRQ_MASK (1 << HF_INHIBIT_IRQ_SHIFT)
164#define HF_CS32_MASK (1 << HF_CS32_SHIFT)
165#define HF_SS32_MASK (1 << HF_SS32_SHIFT)
166#define HF_ADDSEG_MASK (1 << HF_ADDSEG_SHIFT)
167#define HF_PE_MASK (1 << HF_PE_SHIFT)
168#define HF_TF_MASK (1 << HF_TF_SHIFT)
169#define HF_MP_MASK (1 << HF_MP_SHIFT)
170#define HF_EM_MASK (1 << HF_EM_SHIFT)
171#define HF_TS_MASK (1 << HF_TS_SHIFT)
172#define HF_LMA_MASK (1 << HF_LMA_SHIFT)
173#define HF_CS64_MASK (1 << HF_CS64_SHIFT)
174#define HF_OSFXSR_MASK (1 << HF_OSFXSR_SHIFT)
175#define HF_HALTED_MASK (1 << HF_HALTED_SHIFT)
176#define HF_SMM_MASK (1 << HF_SMM_SHIFT)
177
178#define CR0_PE_MASK (1 << 0)
179#define CR0_MP_MASK (1 << 1)
180#define CR0_EM_MASK (1 << 2)
181#define CR0_TS_MASK (1 << 3)
182#define CR0_ET_MASK (1 << 4)
183#define CR0_NE_MASK (1 << 5)
184#define CR0_WP_MASK (1 << 16)
185#define CR0_AM_MASK (1 << 18)
186#define CR0_PG_MASK (1 << 31)
187
188#define CR4_VME_MASK (1 << 0)
189#define CR4_PVI_MASK (1 << 1)
190#define CR4_TSD_MASK (1 << 2)
191#define CR4_DE_MASK (1 << 3)
192#define CR4_PSE_MASK (1 << 4)
193#define CR4_PAE_MASK (1 << 5)
194#define CR4_PGE_MASK (1 << 7)
195#define CR4_PCE_MASK (1 << 8)
196#define CR4_OSFXSR_MASK (1 << 9)
197#define CR4_OSXMMEXCPT_MASK (1 << 10)
198
199#define PG_PRESENT_BIT 0
200#define PG_RW_BIT 1
201#define PG_USER_BIT 2
202#define PG_PWT_BIT 3
203#define PG_PCD_BIT 4
204#define PG_ACCESSED_BIT 5
205#define PG_DIRTY_BIT 6
206#define PG_PSE_BIT 7
207#define PG_GLOBAL_BIT 8
208#define PG_NX_BIT 63
209
210#define PG_PRESENT_MASK (1 << PG_PRESENT_BIT)
211#define PG_RW_MASK (1 << PG_RW_BIT)
212#define PG_USER_MASK (1 << PG_USER_BIT)
213#define PG_PWT_MASK (1 << PG_PWT_BIT)
214#define PG_PCD_MASK (1 << PG_PCD_BIT)
215#define PG_ACCESSED_MASK (1 << PG_ACCESSED_BIT)
216#define PG_DIRTY_MASK (1 << PG_DIRTY_BIT)
217#define PG_PSE_MASK (1 << PG_PSE_BIT)
218#define PG_GLOBAL_MASK (1 << PG_GLOBAL_BIT)
219#define PG_NX_MASK (1LL << PG_NX_BIT)
220
221#define PG_ERROR_W_BIT 1
222
223#define PG_ERROR_P_MASK 0x01
224#define PG_ERROR_W_MASK (1 << PG_ERROR_W_BIT)
225#define PG_ERROR_U_MASK 0x04
226#define PG_ERROR_RSVD_MASK 0x08
227#define PG_ERROR_I_D_MASK 0x10
228
229#define MSR_IA32_APICBASE 0x1b
230#define MSR_IA32_APICBASE_BSP (1<<8)
231#define MSR_IA32_APICBASE_ENABLE (1<<11)
232#define MSR_IA32_APICBASE_BASE (0xfffff<<12)
233
234#ifndef MSR_IA32_SYSENTER_CS /* VBox x86.h klugde */
235#define MSR_IA32_SYSENTER_CS 0x174
236#define MSR_IA32_SYSENTER_ESP 0x175
237#define MSR_IA32_SYSENTER_EIP 0x176
238#endif
239
240#define MSR_MCG_CAP 0x179
241#define MSR_MCG_STATUS 0x17a
242#define MSR_MCG_CTL 0x17b
243
244#define MSR_PAT 0x277
245
246#define MSR_EFER 0xc0000080
247
248#define MSR_EFER_SCE (1 << 0)
249#define MSR_EFER_LME (1 << 8)
250#define MSR_EFER_LMA (1 << 10)
251#define MSR_EFER_NXE (1 << 11)
252#define MSR_EFER_FFXSR (1 << 14)
253
254#define MSR_STAR 0xc0000081
255#define MSR_LSTAR 0xc0000082
256#define MSR_CSTAR 0xc0000083
257#define MSR_FMASK 0xc0000084
258#define MSR_FSBASE 0xc0000100
259#define MSR_GSBASE 0xc0000101
260#define MSR_KERNELGSBASE 0xc0000102
261
262/* cpuid_features bits */
263#define CPUID_FP87 (1 << 0)
264#define CPUID_VME (1 << 1)
265#define CPUID_DE (1 << 2)
266#define CPUID_PSE (1 << 3)
267#define CPUID_TSC (1 << 4)
268#define CPUID_MSR (1 << 5)
269#define CPUID_PAE (1 << 6)
270#define CPUID_MCE (1 << 7)
271#define CPUID_CX8 (1 << 8)
272#define CPUID_APIC (1 << 9)
273#define CPUID_SEP (1 << 11) /* sysenter/sysexit */
274#define CPUID_MTRR (1 << 12)
275#define CPUID_PGE (1 << 13)
276#define CPUID_MCA (1 << 14)
277#define CPUID_CMOV (1 << 15)
278#define CPUID_PAT (1 << 16)
279#define CPUID_PSE36 (1 << 17)
280#define CPUID_CLFLUSH (1 << 19)
281/* ... */
282#define CPUID_MMX (1 << 23)
283#define CPUID_FXSR (1 << 24)
284#define CPUID_SSE (1 << 25)
285#define CPUID_SSE2 (1 << 26)
286
287#ifdef VBOX
288#define CPUID_HTT (1 << 28)
289#endif
290
291#define CPUID_EXT_SSE3 (1 << 0)
292#define CPUID_EXT_MONITOR (1 << 3)
293#define CPUID_EXT_CX16 (1 << 13)
294
295#define CPUID_EXT2_SYSCALL (1 << 11)
296#define CPUID_EXT2_NX (1 << 20)
297#define CPUID_EXT2_FFXSR (1 << 25)
298#define CPUID_EXT2_LM (1 << 29)
299
300#define EXCP00_DIVZ 0
301#define EXCP01_SSTP 1
302#define EXCP02_NMI 2
303#define EXCP03_INT3 3
304#define EXCP04_INTO 4
305#define EXCP05_BOUND 5
306#define EXCP06_ILLOP 6
307#define EXCP07_PREX 7
308#define EXCP08_DBLE 8
309#define EXCP09_XERR 9
310#define EXCP0A_TSS 10
311#define EXCP0B_NOSEG 11
312#define EXCP0C_STACK 12
313#define EXCP0D_GPF 13
314#define EXCP0E_PAGE 14
315#define EXCP10_COPR 16
316#define EXCP11_ALGN 17
317#define EXCP12_MCHK 18
318
319enum {
320 CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */
321 CC_OP_EFLAGS, /* all cc are explicitely computed, CC_SRC = flags */
322
323 CC_OP_MULB, /* modify all flags, C, O = (CC_SRC != 0) */
324 CC_OP_MULW,
325 CC_OP_MULL,
326 CC_OP_MULQ,
327
328 CC_OP_ADDB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
329 CC_OP_ADDW,
330 CC_OP_ADDL,
331 CC_OP_ADDQ,
332
333 CC_OP_ADCB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
334 CC_OP_ADCW,
335 CC_OP_ADCL,
336 CC_OP_ADCQ,
337
338 CC_OP_SUBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
339 CC_OP_SUBW,
340 CC_OP_SUBL,
341 CC_OP_SUBQ,
342
343 CC_OP_SBBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
344 CC_OP_SBBW,
345 CC_OP_SBBL,
346 CC_OP_SBBQ,
347
348 CC_OP_LOGICB, /* modify all flags, CC_DST = res */
349 CC_OP_LOGICW,
350 CC_OP_LOGICL,
351 CC_OP_LOGICQ,
352
353 CC_OP_INCB, /* modify all flags except, CC_DST = res, CC_SRC = C */
354 CC_OP_INCW,
355 CC_OP_INCL,
356 CC_OP_INCQ,
357
358 CC_OP_DECB, /* modify all flags except, CC_DST = res, CC_SRC = C */
359 CC_OP_DECW,
360 CC_OP_DECL,
361 CC_OP_DECQ,
362
363 CC_OP_SHLB, /* modify all flags, CC_DST = res, CC_SRC.msb = C */
364 CC_OP_SHLW,
365 CC_OP_SHLL,
366 CC_OP_SHLQ,
367
368 CC_OP_SARB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */
369 CC_OP_SARW,
370 CC_OP_SARL,
371 CC_OP_SARQ,
372
373 CC_OP_NB,
374};
375
376#ifdef FLOATX80
377#define USE_X86LDOUBLE
378#endif
379
380#ifdef USE_X86LDOUBLE
381typedef floatx80 CPU86_LDouble;
382#else
383typedef float64 CPU86_LDouble;
384#endif
385
386typedef struct SegmentCache {
387 uint32_t selector;
388 target_ulong base;
389 uint32_t limit;
390 uint32_t flags;
391#ifdef VBOX
392 /** The new selector is saved here when we are unable to sync it before invoking the recompiled code. */
393 uint32_t newselector;
394#endif
395} SegmentCache;
396
397typedef union {
398 uint8_t _b[16];
399 uint16_t _w[8];
400 uint32_t _l[4];
401 uint64_t _q[2];
402 float32 _s[4];
403 float64 _d[2];
404} XMMReg;
405
406typedef union {
407 uint8_t _b[8];
408 uint16_t _w[2];
409 uint32_t _l[1];
410 uint64_t q;
411} MMXReg;
412
413#ifdef WORDS_BIGENDIAN
414#define XMM_B(n) _b[15 - (n)]
415#define XMM_W(n) _w[7 - (n)]
416#define XMM_L(n) _l[3 - (n)]
417#define XMM_S(n) _s[3 - (n)]
418#define XMM_Q(n) _q[1 - (n)]
419#define XMM_D(n) _d[1 - (n)]
420
421#define MMX_B(n) _b[7 - (n)]
422#define MMX_W(n) _w[3 - (n)]
423#define MMX_L(n) _l[1 - (n)]
424#else
425#define XMM_B(n) _b[n]
426#define XMM_W(n) _w[n]
427#define XMM_L(n) _l[n]
428#define XMM_S(n) _s[n]
429#define XMM_Q(n) _q[n]
430#define XMM_D(n) _d[n]
431
432#define MMX_B(n) _b[n]
433#define MMX_W(n) _w[n]
434#define MMX_L(n) _l[n]
435#endif
436#define MMX_Q(n) q
437
438#ifdef TARGET_X86_64
439#define CPU_NB_REGS 16
440#else
441#define CPU_NB_REGS 8
442#endif
443
444typedef struct CPUX86State {
445#if TARGET_LONG_BITS > HOST_LONG_BITS
446 /* temporaries if we cannot store them in host registers */
447 target_ulong t0, t1, t2;
448#endif
449
450 /* standard registers */
451 target_ulong regs[CPU_NB_REGS];
452 target_ulong eip;
453 target_ulong eflags; /* eflags register. During CPU emulation, CC
454 flags and DF are set to zero because they are
455 stored elsewhere */
456
457 /* emulator internal eflags handling */
458 target_ulong cc_src;
459 target_ulong cc_dst;
460 uint32_t cc_op;
461 int32_t df; /* D flag : 1 if D = 0, -1 if D = 1 */
462 uint32_t hflags; /* hidden flags, see HF_xxx constants */
463
464 /* segments */
465 SegmentCache segs[6]; /* selector values */
466 SegmentCache ldt;
467 SegmentCache tr;
468 SegmentCache gdt; /* only base and limit are used */
469 SegmentCache idt; /* only base and limit are used */
470
471 target_ulong cr[5]; /* NOTE: cr1 is unused */
472 uint32_t a20_mask;
473
474 /* FPU state */
475 unsigned int fpstt; /* top of stack index */
476 unsigned int fpus;
477 unsigned int fpuc;
478 uint8_t fptags[8]; /* 0 = valid, 1 = empty */
479 union {
480#ifdef USE_X86LDOUBLE
481 CPU86_LDouble d __attribute__((aligned(16)));
482#else
483 CPU86_LDouble d;
484#endif
485 MMXReg mmx;
486 } fpregs[8];
487
488 /* emulator internal variables */
489 float_status fp_status;
490#ifdef VBOX
491 uint32_t alignment3[3]; /* force the long double to start a 16 byte line. */
492#endif
493 CPU86_LDouble ft0;
494#if defined(VBOX) && defined(__X86__) && !defined(__DARWIN__)
495 uint32_t alignment4; /* long double is 12 byte, pad it to 16. */
496#endif
497 union {
498 float f;
499 double d;
500 int i32;
501 int64_t i64;
502 } fp_convert;
503
504 float_status sse_status;
505 uint32_t mxcsr;
506 XMMReg xmm_regs[CPU_NB_REGS];
507 XMMReg xmm_t0;
508 MMXReg mmx_t0;
509
510 /* sysenter registers */
511 uint32_t sysenter_cs;
512 uint32_t sysenter_esp;
513 uint32_t sysenter_eip;
514#ifdef VBOX
515 uint32_t alignment0;
516#endif
517 uint64_t efer;
518 uint64_t star;
519#ifdef TARGET_X86_64
520 target_ulong lstar;
521 target_ulong cstar;
522 target_ulong fmask;
523 target_ulong kernelgsbase;
524#endif
525
526 uint64_t pat;
527
528 /* temporary data for USE_CODE_COPY mode */
529#ifdef USE_CODE_COPY
530 uint32_t tmp0;
531 uint32_t saved_esp;
532 int native_fp_regs; /* if true, the FPU state is in the native CPU regs */
533#endif
534
535 /* exception/interrupt handling */
536 jmp_buf jmp_env;
537#if defined(VBOX) && defined(__WIN__) && defined(__X86__)
538 /* This will be removed when switching to the no-crt code everywhere. */
539 uint32_t alignment1[23];
540#endif
541 int exception_index;
542 int error_code;
543 int exception_is_int;
544 target_ulong exception_next_eip;
545 target_ulong dr[8]; /* debug registers */
546 uint32_t smbase;
547 int interrupt_request;
548 int user_mode_only; /* user mode only simulation */
549
550 CPU_COMMON
551
552#ifdef VBOX
553 /** cpu state flags. (see defines below) */
554 uint32_t state;
555 /** The VM handle. */
556 PVM pVM;
557 /** code buffer for instruction emulation */
558 void *pvCodeBuffer;
559 /** code buffer size */
560 uint32_t cbCodeBuffer;
561#endif /* VBOX */
562
563 /* processor features (e.g. for CPUID insn) */
564#ifndef VBOX /* remR3CpuId deals with these */
565 uint32_t cpuid_level;
566 uint32_t cpuid_vendor1;
567 uint32_t cpuid_vendor2;
568 uint32_t cpuid_vendor3;
569 uint32_t cpuid_version;
570#endif /* !VBOX */
571 uint32_t cpuid_features;
572 uint32_t cpuid_ext_features;
573#ifndef VBOX
574 uint32_t cpuid_xlevel;
575 uint32_t cpuid_model[12];
576#endif /* !VBOX */
577 uint32_t cpuid_ext2_features;
578
579#ifndef VBOX
580#ifdef USE_KQEMU
581 int kqemu_enabled;
582 int last_io_time;
583#endif
584 /* in order to simplify APIC support, we leave this pointer to the
585 user */
586 struct APICState *apic_state;
587#else
588 uint32_t alignment2[3];
589#endif
590} CPUX86State;
591
592#ifdef VBOX
593/** CPUX86State state flags
594 * @{ */
595#define CPU_RAW_RING0 0x0002 /* Set after first time RawR0 is executed, never cleared. */
596#define CPU_EMULATE_SINGLE_INSTR 0x0040 /* Execute a single instruction in emulation mode */
597#define CPU_EMULATE_SINGLE_STEP 0x0080 /* go into single step mode */
598#define CPU_RAW_HWACC 0x0100 /* Set after first time HWACC is executed, never cleared. */
599/** @} */
600#endif /* !VBOX */
601
602#ifdef VBOX
603CPUX86State *cpu_x86_init(CPUX86State *env);
604#else /* !VBOX */
605CPUX86State *cpu_x86_init(void);
606#endif /* !VBOX */
607int cpu_x86_exec(CPUX86State *s);
608void cpu_x86_close(CPUX86State *s);
609int cpu_get_pic_interrupt(CPUX86State *s);
610/* MSDOS compatibility mode FPU exception support */
611void cpu_set_ferr(CPUX86State *s);
612
613/* this function must always be used to load data in the segment
614 cache: it synchronizes the hflags with the segment cache values */
615static inline void cpu_x86_load_seg_cache(CPUX86State *env,
616 int seg_reg, unsigned int selector,
617 target_ulong base,
618 unsigned int limit,
619 unsigned int flags)
620{
621 SegmentCache *sc;
622 unsigned int new_hflags;
623
624 sc = &env->segs[seg_reg];
625 sc->selector = selector;
626 sc->base = base;
627 sc->limit = limit;
628 sc->flags = flags;
629#ifdef VBOX
630 sc->newselector = 0;
631#endif
632
633 /* update the hidden flags */
634 {
635 if (seg_reg == R_CS) {
636#ifdef TARGET_X86_64
637 if ((env->hflags & HF_LMA_MASK) && (flags & DESC_L_MASK)) {
638 /* long mode */
639 env->hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK;
640 env->hflags &= ~(HF_ADDSEG_MASK);
641 } else
642#endif
643 {
644 /* legacy / compatibility case */
645 new_hflags = (env->segs[R_CS].flags & DESC_B_MASK)
646 >> (DESC_B_SHIFT - HF_CS32_SHIFT);
647 env->hflags = (env->hflags & ~(HF_CS32_MASK | HF_CS64_MASK)) |
648 new_hflags;
649 }
650 }
651 new_hflags = (env->segs[R_SS].flags & DESC_B_MASK)
652 >> (DESC_B_SHIFT - HF_SS32_SHIFT);
653 if (env->hflags & HF_CS64_MASK) {
654 /* zero base assumed for DS, ES and SS in long mode */
655 } else if (!(env->cr[0] & CR0_PE_MASK) ||
656 (env->eflags & VM_MASK) ||
657 !(env->hflags & HF_CS32_MASK)) {
658 /* XXX: try to avoid this test. The problem comes from the
659 fact that is real mode or vm86 mode we only modify the
660 'base' and 'selector' fields of the segment cache to go
661 faster. A solution may be to force addseg to one in
662 translate-i386.c. */
663 new_hflags |= HF_ADDSEG_MASK;
664 } else {
665 new_hflags |= ((env->segs[R_DS].base |
666 env->segs[R_ES].base |
667 env->segs[R_SS].base) != 0) <<
668 HF_ADDSEG_SHIFT;
669 }
670 env->hflags = (env->hflags &
671 ~(HF_SS32_MASK | HF_ADDSEG_MASK)) | new_hflags;
672 }
673}
674
675/* wrapper, just in case memory mappings must be changed */
676static inline void cpu_x86_set_cpl(CPUX86State *s, int cpl)
677{
678#if HF_CPL_MASK == 3
679 s->hflags = (s->hflags & ~HF_CPL_MASK) | cpl;
680#else
681#error HF_CPL_MASK is hardcoded
682#endif
683}
684
685/* used for debug or cpu save/restore */
686void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f);
687CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper);
688
689/* the following helpers are only usable in user mode simulation as
690 they can trigger unexpected exceptions */
691void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector);
692void cpu_x86_fsave(CPUX86State *s, uint8_t *ptr, int data32);
693void cpu_x86_frstor(CPUX86State *s, uint8_t *ptr, int data32);
694
695/* you can call this signal handler from your SIGBUS and SIGSEGV
696 signal handlers to inform the virtual CPU of exceptions. non zero
697 is returned if the signal was handled by the virtual CPU. */
698int cpu_x86_signal_handler(int host_signum, void *pinfo,
699 void *puc);
700void cpu_x86_set_a20(CPUX86State *env, int a20_state);
701
702uint64_t cpu_get_tsc(CPUX86State *env);
703
704void cpu_set_apic_base(CPUX86State *env, uint64_t val);
705uint64_t cpu_get_apic_base(CPUX86State *env);
706void cpu_set_apic_tpr(CPUX86State *env, uint8_t val);
707#ifndef NO_CPU_IO_DEFS
708uint8_t cpu_get_apic_tpr(CPUX86State *env);
709#endif
710void cpu_smm_update(CPUX86State *env);
711
712/* will be suppressed */
713void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0);
714
715/* used to debug */
716#define X86_DUMP_FPU 0x0001 /* dump FPU state too */
717#define X86_DUMP_CCOP 0x0002 /* dump qemu flag cache */
718
719#ifdef USE_KQEMU
720static inline int cpu_get_time_fast(void)
721{
722 int low, high;
723 asm volatile("rdtsc" : "=a" (low), "=d" (high));
724 return low;
725}
726#endif
727
728#ifdef VBOX
729void cpu_trap_raw(CPUX86State *env1);
730
731/* in helper.c */
732uint8_t read_byte(CPUX86State *env1, target_ulong addr);
733uint16_t read_word(CPUX86State *env1, target_ulong addr);
734void write_byte(CPUX86State *env1, target_ulong addr, uint8_t val);
735uint32_t read_dword(CPUX86State *env1, target_ulong addr);
736void write_word(CPUX86State *env1, target_ulong addr, uint16_t val);
737void write_dword(CPUX86State *env1, target_ulong addr, uint32_t val);
738/* in helper.c */
739int emulate_single_instr(CPUX86State *env1);
740int get_ss_esp_from_tss_raw(CPUX86State *env1, uint32_t *ss_ptr, uint32_t *esp_ptr, int dpl);
741
742void restore_raw_fp_state(CPUX86State *env, uint8_t *ptr);
743void save_raw_fp_state(CPUX86State *env, uint8_t *ptr);
744
745#endif
746
747#define TARGET_PAGE_BITS 12
748#include "cpu-all.h"
749
750#endif /* CPU_I386_H */
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