2 * Fast486 386/486 CPU Emulation Library
5 * Copyright (C) 2014 Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
27 /* DEFINES ********************************************************************/
30 #define FASTCALL __fastcall
33 #define FAST486_NUM_GEN_REGS 8
34 #define FAST486_NUM_SEG_REGS 6
35 #define FAST486_NUM_CTRL_REGS 3
36 #define FAST486_NUM_DBG_REGS 6
37 #define FAST486_NUM_FPU_REGS 8
39 #define FAST486_CR0_PE (1 << 0)
40 #define FAST486_CR0_MP (1 << 1)
41 #define FAST486_CR0_EM (1 << 2)
42 #define FAST486_CR0_TS (1 << 3)
43 #define FAST486_CR0_ET (1 << 4)
44 #define FAST486_CR0_NE (1 << 5)
45 #define FAST486_CR0_WP (1 << 16)
46 #define FAST486_CR0_AM (1 << 18)
47 #define FAST486_CR0_NW (1 << 29)
48 #define FAST486_CR0_CD (1 << 30)
49 #define FAST486_CR0_PG (1 << 31)
51 #define FAST486_DR4_B0 (1 << 0)
52 #define FAST486_DR4_B1 (1 << 1)
53 #define FAST486_DR4_B2 (1 << 2)
54 #define FAST486_DR4_B3 (1 << 3)
55 #define FAST486_DR4_BD (1 << 13)
56 #define FAST486_DR4_BS (1 << 14)
57 #define FAST486_DR4_BT (1 << 15)
59 #define FAST486_DR5_L0 (1 << 0)
60 #define FAST486_DR5_G0 (1 << 1)
61 #define FAST486_DR5_L1 (1 << 2)
62 #define FAST486_DR5_G1 (1 << 3)
63 #define FAST486_DR5_L2 (1 << 4)
64 #define FAST486_DR5_G2 (1 << 5)
65 #define FAST486_DR5_L3 (1 << 6)
66 #define FAST486_DR5_G3 (1 << 7)
67 #define FAST486_DR5_LE (1 << 8)
68 #define FAST486_DR5_GE (1 << 9)
69 #define FAST486_DR5_GD (1 << 13)
71 #define FAST486_DBG_BREAK_EXEC 0
72 #define FAST486_DBG_BREAK_WRITE 1
73 #define FAST486_DBG_BREAK_READWRITE 3
75 #define FAST486_DR4_RESERVED 0xFFFF1FF0
76 #define FAST486_DR5_RESERVED 0x0000DC00
78 #define FAST486_IDT_TASK_GATE 0x5
79 #define FAST486_IDT_INT_GATE 0x6
80 #define FAST486_IDT_TRAP_GATE 0x7
81 #define FAST486_IDT_INT_GATE_32 0xE
82 #define FAST486_IDT_TRAP_GATE_32 0xF
84 #define FAST486_LDT_SIGNATURE 0x02
85 #define FAST486_TSS_SIGNATURE 0x09
87 #define FAST486_PREFIX_SEG (1 << 0)
88 #define FAST486_PREFIX_OPSIZE (1 << 1)
89 #define FAST486_PREFIX_ADSIZE (1 << 2)
90 #define FAST486_PREFIX_LOCK (1 << 3)
91 #define FAST486_PREFIX_REPNZ (1 << 4)
92 #define FAST486_PREFIX_REP (1 << 5)
94 #define FAST486_FPU_DEFAULT_CONTROL 0x037F
96 struct _FAST486_STATE
;
97 typedef struct _FAST486_STATE FAST486_STATE
, *PFAST486_STATE
;
99 typedef enum _FAST486_GEN_REGS
109 } FAST486_GEN_REGS
, *PFAST486_GEN_REGS
;
111 typedef enum _FAST486_SEG_REGS
119 } FAST486_SEG_REGS
, *PFAST486_SEG_REGS
;
121 typedef enum _FAST486_CTRL_REGS
126 } FAST486_CTRL_REGS
, *PFAST486_CTRL_REGS
;
128 typedef enum _FAST486_DBG_REGS
136 FAST486_REG_DR6
= 4, // alias to DR4
137 FAST486_REG_DR7
= 5 // alias to DR5
138 } FAST486_DBG_REGS
, *PFAST486_DBG_REGS
;
140 typedef enum _FAST486_EXCEPTIONS
142 FAST486_EXCEPTION_DE
= 0x00,
143 FAST486_EXCEPTION_DB
= 0x01,
144 FAST486_EXCEPTION_BP
= 0x03,
145 FAST486_EXCEPTION_OF
= 0x04,
146 FAST486_EXCEPTION_BR
= 0x05,
147 FAST486_EXCEPTION_UD
= 0x06,
148 FAST486_EXCEPTION_NM
= 0x07,
149 FAST486_EXCEPTION_DF
= 0x08,
150 FAST486_EXCEPTION_TS
= 0x0A,
151 FAST486_EXCEPTION_NP
= 0x0B,
152 FAST486_EXCEPTION_SS
= 0x0C,
153 FAST486_EXCEPTION_GP
= 0x0D,
154 FAST486_EXCEPTION_PF
= 0x0E,
155 FAST486_EXCEPTION_MF
= 0x10,
156 FAST486_EXCEPTION_AC
= 0x11,
157 FAST486_EXCEPTION_MC
= 0x12
158 } FAST486_EXCEPTIONS
, *PFAST486_EXCEPTIONS
;
160 typedef enum _FAST486_INT_STATUS
162 FAST486_INT_NONE
= 0,
163 FAST486_INT_EXECUTE
= 1,
164 FAST486_INT_SIGNAL
= 2,
165 FAST486_INT_DELAYED
= 3
166 } FAST486_INT_STATUS
, *PFAST486_INT_STATUS
;
170 (NTAPI
*FAST486_MEM_READ_PROC
)
172 PFAST486_STATE State
,
180 (NTAPI
*FAST486_MEM_WRITE_PROC
)
182 PFAST486_STATE State
,
190 (NTAPI
*FAST486_IO_READ_PROC
)
192 PFAST486_STATE State
,
201 (NTAPI
*FAST486_IO_WRITE_PROC
)
203 PFAST486_STATE State
,
212 (NTAPI
*FAST486_BOP_PROC
)
214 PFAST486_STATE State
,
220 (NTAPI
*FAST486_INT_ACK_PROC
)
225 typedef union _FAST486_REG
237 } FAST486_REG
, *PFAST486_REG
;
239 typedef struct _FAST486_SEG_REG
243 /* Descriptor cache */
247 ULONG Executable
: 1;
248 ULONG SystemType
: 1;
255 } FAST486_SEG_REG
, *PFAST486_SEG_REG
;
257 typedef struct _FAST486_LDT_REG
262 } FAST486_LDT_REG
, *PFAST486_LDT_REG
;
264 typedef struct _FAST486_TASK_REG
270 } FAST486_TASK_REG
, *PFAST486_TASK_REG
;
272 #include <pshpack1.h>
282 ULONG Executable
: 1;
283 ULONG SystemType
: 1;
290 ULONG Granularity
: 1;
292 } FAST486_GDT_ENTRY
, *PFAST486_GDT_ENTRY
;
294 /* Verify the structure size */
295 C_ASSERT(sizeof(FAST486_GDT_ENTRY
) == sizeof(ULONGLONG
));
308 ULONG Granularity
: 1;
310 } FAST486_SYSTEM_DESCRIPTOR
, *PFAST486_SYSTEM_DESCRIPTOR
;
312 /* Verify the structure size */
313 C_ASSERT(sizeof(FAST486_SYSTEM_DESCRIPTOR
) == sizeof(ULONGLONG
));
319 ULONG ParamCount
: 5;
322 ULONG SystemType
: 1;
325 ULONG OffsetHigh
: 16;
326 } FAST486_CALL_GATE
, *PFAST486_CALL_GATE
;
328 /* Verify the structure size */
329 C_ASSERT(sizeof(FAST486_CALL_GATE
) == sizeof(ULONGLONG
));
340 ULONG OffsetHigh
: 16;
341 } FAST486_IDT_ENTRY
, *PFAST486_IDT_ENTRY
;
343 /* Verify the structure size */
344 C_ASSERT(sizeof(FAST486_IDT_ENTRY
) == sizeof(ULONGLONG
));
348 typedef struct _FAST486_TABLE_REG
352 } FAST486_TABLE_REG
, *PFAST486_TABLE_REG
;
354 typedef union _FAST486_FLAGS_REG
380 // ULONG Reserved : 13;
382 } FAST486_FLAGS_REG
, *PFAST486_FLAGS_REG
;
384 typedef struct _FAST486_TSS
412 } FAST486_TSS
, *PFAST486_TSS
;
414 typedef struct _FAST486_FPU_DATA_REG
419 } FAST486_FPU_DATA_REG
, *PFAST486_FPU_DATA_REG
;
421 typedef union _FAST486_FPU_STATUS_REG
442 } FAST486_FPU_STATUS_REG
, *PFAST486_FPU_STATUS_REG
;
444 typedef union _FAST486_FPU_CONTROL_REG
460 // ULONG Reserved1 : 3;
462 } FAST486_FPU_CONTROL_REG
, *PFAST486_FPU_CONTROL_REG
;
464 struct _FAST486_STATE
466 FAST486_MEM_READ_PROC MemReadCallback
;
467 FAST486_MEM_WRITE_PROC MemWriteCallback
;
468 FAST486_IO_READ_PROC IoReadCallback
;
469 FAST486_IO_WRITE_PROC IoWriteCallback
;
470 FAST486_BOP_PROC BopCallback
;
471 FAST486_INT_ACK_PROC IntAckCallback
;
472 FAST486_REG GeneralRegs
[FAST486_NUM_GEN_REGS
];
473 FAST486_SEG_REG SegmentRegs
[FAST486_NUM_SEG_REGS
];
474 FAST486_REG InstPtr
, SavedInstPtr
;
475 FAST486_FLAGS_REG Flags
;
476 FAST486_TABLE_REG Gdtr
, Idtr
;
477 FAST486_LDT_REG Ldtr
;
478 FAST486_TASK_REG TaskReg
;
480 ULONG ControlRegisters
[FAST486_NUM_CTRL_REGS
];
481 ULONG DebugRegisters
[FAST486_NUM_DBG_REGS
];
482 ULONG ExceptionCount
;
484 FAST486_SEG_REGS SegmentOverride
;
486 FAST486_INT_STATUS IntStatus
;
489 #ifndef FAST486_NO_FPU
490 FAST486_FPU_DATA_REG FpuRegisters
[FAST486_NUM_FPU_REGS
];
491 FAST486_FPU_STATUS_REG FpuStatus
;
492 FAST486_FPU_CONTROL_REG FpuControl
;
497 /* FUNCTIONS ******************************************************************/
501 Fast486Initialize(PFAST486_STATE State
,
502 FAST486_MEM_READ_PROC MemReadCallback
,
503 FAST486_MEM_WRITE_PROC MemWriteCallback
,
504 FAST486_IO_READ_PROC IoReadCallback
,
505 FAST486_IO_WRITE_PROC IoWriteCallback
,
506 FAST486_BOP_PROC BopCallback
,
507 FAST486_INT_ACK_PROC IntAckCallback
,
512 Fast486Reset(PFAST486_STATE State
);
516 Fast486Continue(PFAST486_STATE State
);
520 Fast486StepInto(PFAST486_STATE State
);
524 Fast486StepOver(PFAST486_STATE State
);
528 Fast486StepOut(PFAST486_STATE State
);
532 Fast486DumpState(PFAST486_STATE State
);
536 Fast486Interrupt(PFAST486_STATE State
, UCHAR Number
);
540 Fast486InterruptSignal(PFAST486_STATE State
);
544 Fast486ExecuteAt(PFAST486_STATE State
, USHORT Segment
, ULONG Offset
);
548 Fast486SetStack(PFAST486_STATE State
, USHORT Segment
, ULONG Offset
);
554 PFAST486_STATE State
,
555 FAST486_SEG_REGS Segment
,
559 #endif // _FAST486_H_