VirtualBox

source: vbox/trunk/src/recompiler/target-i386/cpu.h@ 9721

Last change on this file since 9721 was 9486, checked in by vboxsync, 17 years ago

Synced 64 bits lahf/sahf from QEmu.
  • Property svn:eol-style set to native
File size: 22.2 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_DSCPL (1 << 4)
294#define CPUID_EXT_VMX (1 << 5)
295#define CPUID_EXT_SMX (1 << 6)
296#define CPUID_EXT_EST (1 << 7)
297#define CPUID_EXT_TM2 (1 << 8)
298#define CPUID_EXT_SSSE3 (1 << 9)
299#define CPUID_EXT_CID (1 << 10)
300#define CPUID_EXT_CX16 (1 << 13)
301#define CPUID_EXT_XTPR (1 << 14)
302#define CPUID_EXT_DCA (1 << 17)
303#define CPUID_EXT_POPCNT (1 << 22)
304
305#define CPUID_EXT2_SYSCALL (1 << 11)
306#define CPUID_EXT2_MP (1 << 19)
307#define CPUID_EXT2_NX (1 << 20)
308#define CPUID_EXT2_MMXEXT (1 << 22)
309#define CPUID_EXT2_FFXSR (1 << 25)
310#define CPUID_EXT2_PDPE1GB (1 << 26)
311#define CPUID_EXT2_RDTSCP (1 << 27)
312#define CPUID_EXT2_LM (1 << 29)
313#define CPUID_EXT2_3DNOWEXT (1 << 30)
314#define CPUID_EXT2_3DNOW (1 << 31)
315
316#define CPUID_EXT3_LAHF_LM (1 << 0)
317#define CPUID_EXT3_CMP_LEG (1 << 1)
318#define CPUID_EXT3_SVM (1 << 2)
319#define CPUID_EXT3_EXTAPIC (1 << 3)
320#define CPUID_EXT3_CR8LEG (1 << 4)
321#define CPUID_EXT3_ABM (1 << 5)
322#define CPUID_EXT3_SSE4A (1 << 6)
323#define CPUID_EXT3_MISALIGNSSE (1 << 7)
324#define CPUID_EXT3_3DNOWPREFETCH (1 << 8)
325#define CPUID_EXT3_OSVW (1 << 9)
326#define CPUID_EXT3_IBS (1 << 10)
327
328#define EXCP00_DIVZ 0
329#define EXCP01_SSTP 1
330#define EXCP02_NMI 2
331#define EXCP03_INT3 3
332#define EXCP04_INTO 4
333#define EXCP05_BOUND 5
334#define EXCP06_ILLOP 6
335#define EXCP07_PREX 7
336#define EXCP08_DBLE 8
337#define EXCP09_XERR 9
338#define EXCP0A_TSS 10
339#define EXCP0B_NOSEG 11
340#define EXCP0C_STACK 12
341#define EXCP0D_GPF 13
342#define EXCP0E_PAGE 14
343#define EXCP10_COPR 16
344#define EXCP11_ALGN 17
345#define EXCP12_MCHK 18
346
347enum {
348 CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */
349 CC_OP_EFLAGS, /* all cc are explicitely computed, CC_SRC = flags */
350
351 CC_OP_MULB, /* modify all flags, C, O = (CC_SRC != 0) */
352 CC_OP_MULW,
353 CC_OP_MULL,
354 CC_OP_MULQ,
355
356 CC_OP_ADDB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
357 CC_OP_ADDW,
358 CC_OP_ADDL,
359 CC_OP_ADDQ,
360
361 CC_OP_ADCB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
362 CC_OP_ADCW,
363 CC_OP_ADCL,
364 CC_OP_ADCQ,
365
366 CC_OP_SUBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
367 CC_OP_SUBW,
368 CC_OP_SUBL,
369 CC_OP_SUBQ,
370
371 CC_OP_SBBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */
372 CC_OP_SBBW,
373 CC_OP_SBBL,
374 CC_OP_SBBQ,
375
376 CC_OP_LOGICB, /* modify all flags, CC_DST = res */
377 CC_OP_LOGICW,
378 CC_OP_LOGICL,
379 CC_OP_LOGICQ,
380
381 CC_OP_INCB, /* modify all flags except, CC_DST = res, CC_SRC = C */
382 CC_OP_INCW,
383 CC_OP_INCL,
384 CC_OP_INCQ,
385
386 CC_OP_DECB, /* modify all flags except, CC_DST = res, CC_SRC = C */
387 CC_OP_DECW,
388 CC_OP_DECL,
389 CC_OP_DECQ,
390
391 CC_OP_SHLB, /* modify all flags, CC_DST = res, CC_SRC.msb = C */
392 CC_OP_SHLW,
393 CC_OP_SHLL,
394 CC_OP_SHLQ,
395
396 CC_OP_SARB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */
397 CC_OP_SARW,
398 CC_OP_SARL,
399 CC_OP_SARQ,
400
401 CC_OP_NB,
402};
403
404#ifdef FLOATX80
405#define USE_X86LDOUBLE
406#endif
407
408#ifdef USE_X86LDOUBLE
409typedef floatx80 CPU86_LDouble;
410#else
411typedef float64 CPU86_LDouble;
412#endif
413
414typedef struct SegmentCache {
415 uint32_t selector;
416 target_ulong base;
417 uint32_t limit;
418 uint32_t flags;
419#ifdef VBOX
420 /** The new selector is saved here when we are unable to sync it before invoking the recompiled code. */
421 uint32_t newselector;
422#endif
423} SegmentCache;
424
425typedef union {
426 uint8_t _b[16];
427 uint16_t _w[8];
428 uint32_t _l[4];
429 uint64_t _q[2];
430 float32 _s[4];
431 float64 _d[2];
432} XMMReg;
433
434typedef union {
435 uint8_t _b[8];
436 uint16_t _w[2];
437 uint32_t _l[1];
438 uint64_t q;
439} MMXReg;
440
441#ifdef WORDS_BIGENDIAN
442#define XMM_B(n) _b[15 - (n)]
443#define XMM_W(n) _w[7 - (n)]
444#define XMM_L(n) _l[3 - (n)]
445#define XMM_S(n) _s[3 - (n)]
446#define XMM_Q(n) _q[1 - (n)]
447#define XMM_D(n) _d[1 - (n)]
448
449#define MMX_B(n) _b[7 - (n)]
450#define MMX_W(n) _w[3 - (n)]
451#define MMX_L(n) _l[1 - (n)]
452#else
453#define XMM_B(n) _b[n]
454#define XMM_W(n) _w[n]
455#define XMM_L(n) _l[n]
456#define XMM_S(n) _s[n]
457#define XMM_Q(n) _q[n]
458#define XMM_D(n) _d[n]
459
460#define MMX_B(n) _b[n]
461#define MMX_W(n) _w[n]
462#define MMX_L(n) _l[n]
463#endif
464#define MMX_Q(n) q
465
466#ifdef TARGET_X86_64
467#define CPU_NB_REGS 16
468#else
469#define CPU_NB_REGS 8
470#endif
471
472typedef struct CPUX86State {
473#if TARGET_LONG_BITS > HOST_LONG_BITS
474 /* temporaries if we cannot store them in host registers */
475 target_ulong t0, t1, t2;
476#endif
477
478 /* standard registers */
479 target_ulong regs[CPU_NB_REGS];
480 target_ulong eip;
481 target_ulong eflags; /* eflags register. During CPU emulation, CC
482 flags and DF are set to zero because they are
483 stored elsewhere */
484
485 /* emulator internal eflags handling */
486 target_ulong cc_src;
487 target_ulong cc_dst;
488 uint32_t cc_op;
489 int32_t df; /* D flag : 1 if D = 0, -1 if D = 1 */
490 uint32_t hflags; /* hidden flags, see HF_xxx constants */
491
492 /* segments */
493 SegmentCache segs[6]; /* selector values */
494 SegmentCache ldt;
495 SegmentCache tr;
496 SegmentCache gdt; /* only base and limit are used */
497 SegmentCache idt; /* only base and limit are used */
498
499 target_ulong cr[5]; /* NOTE: cr1 is unused */
500 uint32_t a20_mask;
501
502 /* FPU state */
503 unsigned int fpstt; /* top of stack index */
504 unsigned int fpus;
505 unsigned int fpuc;
506 uint8_t fptags[8]; /* 0 = valid, 1 = empty */
507 union {
508#ifdef USE_X86LDOUBLE
509 CPU86_LDouble d __attribute__((aligned(16)));
510#else
511 CPU86_LDouble d;
512#endif
513 MMXReg mmx;
514 } fpregs[8];
515
516 /* emulator internal variables */
517 float_status fp_status;
518#ifdef VBOX
519 uint32_t alignment3[3]; /* force the long double to start a 16 byte line. */
520#endif
521 CPU86_LDouble ft0;
522#if defined(VBOX) && defined(RT_ARCH_X86) && !defined(RT_OS_DARWIN)
523 uint32_t alignment4; /* long double is 12 byte, pad it to 16. */
524#endif
525 union {
526 float f;
527 double d;
528 int i32;
529 int64_t i64;
530 } fp_convert;
531
532 float_status sse_status;
533 uint32_t mxcsr;
534 XMMReg xmm_regs[CPU_NB_REGS];
535 XMMReg xmm_t0;
536 MMXReg mmx_t0;
537
538 /* sysenter registers */
539 uint32_t sysenter_cs;
540 uint32_t sysenter_esp;
541 uint32_t sysenter_eip;
542#ifdef VBOX
543 uint32_t alignment0;
544#endif
545 uint64_t efer;
546 uint64_t star;
547#ifdef TARGET_X86_64
548 target_ulong lstar;
549 target_ulong cstar;
550 target_ulong fmask;
551 target_ulong kernelgsbase;
552#endif
553
554 uint64_t pat;
555
556 /* temporary data for USE_CODE_COPY mode */
557#ifdef USE_CODE_COPY
558 uint32_t tmp0;
559 uint32_t saved_esp;
560 int native_fp_regs; /* if true, the FPU state is in the native CPU regs */
561#endif
562
563 /* exception/interrupt handling */
564 jmp_buf jmp_env;
565#if defined(VBOX) && defined(RT_OS_WINDOWS) && defined(RT_ARCH_X86)
566 /* This will be removed when switching to the no-crt code everywhere. */
567 uint32_t alignment1[23];
568#endif
569 int exception_index;
570 int error_code;
571 int exception_is_int;
572 target_ulong exception_next_eip;
573 target_ulong dr[8]; /* debug registers */
574 uint32_t smbase;
575 int interrupt_request;
576 int user_mode_only; /* user mode only simulation */
577
578 CPU_COMMON
579
580#ifdef VBOX
581 /** cpu state flags. (see defines below) */
582 uint32_t state;
583 /** The VM handle. */
584 PVM pVM;
585 /** code buffer for instruction emulation */
586 void *pvCodeBuffer;
587 /** code buffer size */
588 uint32_t cbCodeBuffer;
589#endif /* VBOX */
590
591 /* processor features (e.g. for CPUID insn) */
592#ifndef VBOX /* remR3CpuId deals with these */
593 uint32_t cpuid_level;
594 uint32_t cpuid_vendor1;
595 uint32_t cpuid_vendor2;
596 uint32_t cpuid_vendor3;
597 uint32_t cpuid_version;
598#endif /* !VBOX */
599 uint32_t cpuid_features;
600 uint32_t cpuid_ext_features;
601#ifndef VBOX
602 uint32_t cpuid_xlevel;
603 uint32_t cpuid_model[12];
604#endif /* !VBOX */
605 uint32_t cpuid_ext2_features;
606 uint32_t cpuid_ext3_features;
607
608#ifndef VBOX
609#ifdef USE_KQEMU
610 int kqemu_enabled;
611 int last_io_time;
612#endif
613 /* in order to simplify APIC support, we leave this pointer to the
614 user */
615 struct APICState *apic_state;
616#else
617 uint32_t alignment2[3];
618#endif
619} CPUX86State;
620
621#ifdef VBOX
622/** CPUX86State state flags
623 * @{ */
624#define CPU_RAW_RING0 0x0002 /* Set after first time RawR0 is executed, never cleared. */
625#define CPU_EMULATE_SINGLE_INSTR 0x0040 /* Execute a single instruction in emulation mode */
626#define CPU_EMULATE_SINGLE_STEP 0x0080 /* go into single step mode */
627#define CPU_RAW_HWACC 0x0100 /* Set after first time HWACC is executed, never cleared. */
628/** @} */
629#endif /* !VBOX */
630
631#ifdef VBOX
632CPUX86State *cpu_x86_init(CPUX86State *env);
633#else /* !VBOX */
634CPUX86State *cpu_x86_init(void);
635#endif /* !VBOX */
636int cpu_x86_exec(CPUX86State *s);
637void cpu_x86_close(CPUX86State *s);
638int cpu_get_pic_interrupt(CPUX86State *s);
639/* MSDOS compatibility mode FPU exception support */
640void cpu_set_ferr(CPUX86State *s);
641
642/* this function must always be used to load data in the segment
643 cache: it synchronizes the hflags with the segment cache values */
644static inline void cpu_x86_load_seg_cache(CPUX86State *env,
645 int seg_reg, unsigned int selector,
646 target_ulong base,
647 unsigned int limit,
648 unsigned int flags)
649{
650 SegmentCache *sc;
651 unsigned int new_hflags;
652
653 sc = &env->segs[seg_reg];
654 sc->selector = selector;
655 sc->base = base;
656 sc->limit = limit;
657 sc->flags = flags;
658#ifdef VBOX
659 sc->newselector = 0;
660#endif
661
662 /* update the hidden flags */
663 {
664 if (seg_reg == R_CS) {
665#ifdef TARGET_X86_64
666 if ((env->hflags & HF_LMA_MASK) && (flags & DESC_L_MASK)) {
667 /* long mode */
668 env->hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK;
669 env->hflags &= ~(HF_ADDSEG_MASK);
670 } else
671#endif
672 {
673 /* legacy / compatibility case */
674 new_hflags = (env->segs[R_CS].flags & DESC_B_MASK)
675 >> (DESC_B_SHIFT - HF_CS32_SHIFT);
676 env->hflags = (env->hflags & ~(HF_CS32_MASK | HF_CS64_MASK)) |
677 new_hflags;
678 }
679 }
680 new_hflags = (env->segs[R_SS].flags & DESC_B_MASK)
681 >> (DESC_B_SHIFT - HF_SS32_SHIFT);
682 if (env->hflags & HF_CS64_MASK) {
683 /* zero base assumed for DS, ES and SS in long mode */
684 } else if (!(env->cr[0] & CR0_PE_MASK) ||
685 (env->eflags & VM_MASK) ||
686 !(env->hflags & HF_CS32_MASK)) {
687 /* XXX: try to avoid this test. The problem comes from the
688 fact that is real mode or vm86 mode we only modify the
689 'base' and 'selector' fields of the segment cache to go
690 faster. A solution may be to force addseg to one in
691 translate-i386.c. */
692 new_hflags |= HF_ADDSEG_MASK;
693 } else {
694 new_hflags |= ((env->segs[R_DS].base |
695 env->segs[R_ES].base |
696 env->segs[R_SS].base) != 0) <<
697 HF_ADDSEG_SHIFT;
698 }
699 env->hflags = (env->hflags &
700 ~(HF_SS32_MASK | HF_ADDSEG_MASK)) | new_hflags;
701 }
702}
703
704/* wrapper, just in case memory mappings must be changed */
705static inline void cpu_x86_set_cpl(CPUX86State *s, int cpl)
706{
707#if HF_CPL_MASK == 3
708 s->hflags = (s->hflags & ~HF_CPL_MASK) | cpl;
709#else
710#error HF_CPL_MASK is hardcoded
711#endif
712}
713
714/* used for debug or cpu save/restore */
715void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f);
716CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper);
717
718/* the following helpers are only usable in user mode simulation as
719 they can trigger unexpected exceptions */
720void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector);
721void cpu_x86_fsave(CPUX86State *s, uint8_t *ptr, int data32);
722void cpu_x86_frstor(CPUX86State *s, uint8_t *ptr, int data32);
723
724/* you can call this signal handler from your SIGBUS and SIGSEGV
725 signal handlers to inform the virtual CPU of exceptions. non zero
726 is returned if the signal was handled by the virtual CPU. */
727int cpu_x86_signal_handler(int host_signum, void *pinfo,
728 void *puc);
729void cpu_x86_set_a20(CPUX86State *env, int a20_state);
730
731uint64_t cpu_get_tsc(CPUX86State *env);
732
733void cpu_set_apic_base(CPUX86State *env, uint64_t val);
734uint64_t cpu_get_apic_base(CPUX86State *env);
735void cpu_set_apic_tpr(CPUX86State *env, uint8_t val);
736#ifndef NO_CPU_IO_DEFS
737uint8_t cpu_get_apic_tpr(CPUX86State *env);
738#endif
739void cpu_smm_update(CPUX86State *env);
740
741/* will be suppressed */
742void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0);
743
744/* used to debug */
745#define X86_DUMP_FPU 0x0001 /* dump FPU state too */
746#define X86_DUMP_CCOP 0x0002 /* dump qemu flag cache */
747
748#ifdef USE_KQEMU
749static inline int cpu_get_time_fast(void)
750{
751 int low, high;
752 asm volatile("rdtsc" : "=a" (low), "=d" (high));
753 return low;
754}
755#endif
756
757#ifdef VBOX
758void cpu_trap_raw(CPUX86State *env1);
759
760/* in helper.c */
761uint8_t read_byte(CPUX86State *env1, target_ulong addr);
762uint16_t read_word(CPUX86State *env1, target_ulong addr);
763void write_byte(CPUX86State *env1, target_ulong addr, uint8_t val);
764uint32_t read_dword(CPUX86State *env1, target_ulong addr);
765void write_word(CPUX86State *env1, target_ulong addr, uint16_t val);
766void write_dword(CPUX86State *env1, target_ulong addr, uint32_t val);
767/* in helper.c */
768int emulate_single_instr(CPUX86State *env1);
769int get_ss_esp_from_tss_raw(CPUX86State *env1, uint32_t *ss_ptr, uint32_t *esp_ptr, int dpl);
770
771void restore_raw_fp_state(CPUX86State *env, uint8_t *ptr);
772void save_raw_fp_state(CPUX86State *env, uint8_t *ptr);
773
774#endif
775
776#define TARGET_PAGE_BITS 12
777#include "cpu-all.h"
778
779#endif /* CPU_I386_H */
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