| /**************************************************************************** |
| * |
| * Realmode X86 Emulator Library |
| * |
| * Copyright (C) 1996-1999 SciTech Software, Inc. |
| * Copyright (C) David Mosberger-Tang |
| * Copyright (C) 1999 Egbert Eich |
| * |
| * ======================================================================== |
| * |
| * Permission to use, copy, modify, distribute, and sell this software and |
| * its documentation for any purpose is hereby granted without fee, |
| * provided that the above copyright notice appear in all copies and that |
| * both that copyright notice and this permission notice appear in |
| * supporting documentation, and that the name of the authors not be used |
| * in advertising or publicity pertaining to distribution of the software |
| * without specific, written prior permission. The authors makes no |
| * representations about the suitability of this software for any purpose. |
| * It is provided "as is" without express or implied warranty. |
| * |
| * THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
| * EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF |
| * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR |
| * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| * PERFORMANCE OF THIS SOFTWARE. |
| * |
| * ======================================================================== |
| * |
| * Language: ANSI C |
| * Environment: Any |
| * Developer: Kendall Bennett |
| * |
| * Description: Header file for x86 register definitions. |
| * |
| ****************************************************************************/ |
| |
| #ifndef __X86EMU_REGS_H |
| #define __X86EMU_REGS_H |
| |
| /*---------------------- Macros and type definitions ----------------------*/ |
| |
| #pragma pack(1) |
| |
| /* |
| * General EAX, EBX, ECX, EDX type registers. Note that for |
| * portability, and speed, the issue of byte swapping is not addressed |
| * in the registers. All registers are stored in the default format |
| * available on the host machine. The only critical issue is that the |
| * registers should line up EXACTLY in the same manner as they do in |
| * the 386. That is: |
| * |
| * EAX & 0xff === AL |
| * EAX & 0xffff == AX |
| * |
| * etc. The result is that alot of the calculations can then be |
| * done using the native instruction set fully. |
| */ |
| |
| #ifdef __BIG_ENDIAN__ |
| |
| typedef struct { |
| u32 e_reg; |
| } I32_reg_t; |
| |
| typedef struct { |
| u16 filler0, x_reg; |
| } I16_reg_t; |
| |
| typedef struct { |
| u8 filler0, filler1, h_reg, l_reg; |
| } I8_reg_t; |
| |
| #else /* !__BIG_ENDIAN__ */ |
| |
| typedef struct { |
| u32 e_reg; |
| } I32_reg_t; |
| |
| typedef struct { |
| u16 x_reg; |
| } I16_reg_t; |
| |
| typedef struct { |
| u8 l_reg, h_reg; |
| } I8_reg_t; |
| |
| #endif /* BIG_ENDIAN */ |
| |
| typedef union { |
| I32_reg_t I32_reg; |
| I16_reg_t I16_reg; |
| I8_reg_t I8_reg; |
| } i386_general_register; |
| |
| struct i386_general_regs { |
| i386_general_register A, B, C, D; |
| }; |
| |
| typedef struct i386_general_regs Gen_reg_t; |
| |
| struct i386_special_regs { |
| i386_general_register SP, BP, SI, DI, IP; |
| u32 FLAGS; |
| }; |
| |
| /* |
| * Segment registers here represent the 16 bit quantities |
| * CS, DS, ES, SS. |
| */ |
| |
| struct i386_segment_regs { |
| u16 CS, DS, SS, ES, FS, GS; |
| }; |
| |
| /* 8 bit registers */ |
| #define R_AH gen.A.I8_reg.h_reg |
| #define R_AL gen.A.I8_reg.l_reg |
| #define R_BH gen.B.I8_reg.h_reg |
| #define R_BL gen.B.I8_reg.l_reg |
| #define R_CH gen.C.I8_reg.h_reg |
| #define R_CL gen.C.I8_reg.l_reg |
| #define R_DH gen.D.I8_reg.h_reg |
| #define R_DL gen.D.I8_reg.l_reg |
| |
| /* 16 bit registers */ |
| #define R_AX gen.A.I16_reg.x_reg |
| #define R_BX gen.B.I16_reg.x_reg |
| #define R_CX gen.C.I16_reg.x_reg |
| #define R_DX gen.D.I16_reg.x_reg |
| |
| /* 32 bit extended registers */ |
| #define R_EAX gen.A.I32_reg.e_reg |
| #define R_EBX gen.B.I32_reg.e_reg |
| #define R_ECX gen.C.I32_reg.e_reg |
| #define R_EDX gen.D.I32_reg.e_reg |
| |
| /* special registers */ |
| #define R_SP spc.SP.I16_reg.x_reg |
| #define R_BP spc.BP.I16_reg.x_reg |
| #define R_SI spc.SI.I16_reg.x_reg |
| #define R_DI spc.DI.I16_reg.x_reg |
| #define R_IP spc.IP.I16_reg.x_reg |
| #define R_FLG spc.FLAGS |
| |
| /* special registers */ |
| #define R_SP spc.SP.I16_reg.x_reg |
| #define R_BP spc.BP.I16_reg.x_reg |
| #define R_SI spc.SI.I16_reg.x_reg |
| #define R_DI spc.DI.I16_reg.x_reg |
| #define R_IP spc.IP.I16_reg.x_reg |
| #define R_FLG spc.FLAGS |
| |
| /* special registers */ |
| #define R_ESP spc.SP.I32_reg.e_reg |
| #define R_EBP spc.BP.I32_reg.e_reg |
| #define R_ESI spc.SI.I32_reg.e_reg |
| #define R_EDI spc.DI.I32_reg.e_reg |
| #define R_EIP spc.IP.I32_reg.e_reg |
| #define R_EFLG spc.FLAGS |
| |
| /* segment registers */ |
| #define R_CS seg.CS |
| #define R_DS seg.DS |
| #define R_SS seg.SS |
| #define R_ES seg.ES |
| #define R_FS seg.FS |
| #define R_GS seg.GS |
| |
| /* flag conditions */ |
| #define FB_CF 0x0001 /* CARRY flag */ |
| #define FB_PF 0x0004 /* PARITY flag */ |
| #define FB_AF 0x0010 /* AUX flag */ |
| #define FB_ZF 0x0040 /* ZERO flag */ |
| #define FB_SF 0x0080 /* SIGN flag */ |
| #define FB_TF 0x0100 /* TRAP flag */ |
| #define FB_IF 0x0200 /* INTERRUPT ENABLE flag */ |
| #define FB_DF 0x0400 /* DIR flag */ |
| #define FB_OF 0x0800 /* OVERFLOW flag */ |
| |
| /* 80286 and above always have bit#1 set */ |
| #define F_ALWAYS_ON (0x0002) /* flag bits always on */ |
| |
| /* |
| * Define a mask for only those flag bits we will ever pass back |
| * (via PUSHF) |
| */ |
| #define F_MSK (FB_CF|FB_PF|FB_AF|FB_ZF|FB_SF|FB_TF|FB_IF|FB_DF|FB_OF) |
| |
| /* following bits masked in to a 16bit quantity */ |
| |
| #define F_CF 0x0001 /* CARRY flag */ |
| #define F_PF 0x0004 /* PARITY flag */ |
| #define F_AF 0x0010 /* AUX flag */ |
| #define F_ZF 0x0040 /* ZERO flag */ |
| #define F_SF 0x0080 /* SIGN flag */ |
| #define F_TF 0x0100 /* TRAP flag */ |
| #define F_IF 0x0200 /* INTERRUPT ENABLE flag */ |
| #define F_DF 0x0400 /* DIR flag */ |
| #define F_OF 0x0800 /* OVERFLOW flag */ |
| |
| #define TOGGLE_FLAG(flag) (M.x86.R_FLG ^= (flag)) |
| #define SET_FLAG(flag) (M.x86.R_FLG |= (flag)) |
| #define CLEAR_FLAG(flag) (M.x86.R_FLG &= ~(flag)) |
| #define ACCESS_FLAG(flag) (M.x86.R_FLG & (flag)) |
| #define CLEARALL_FLAG(m) (M.x86.R_FLG = 0) |
| |
| #define CONDITIONAL_SET_FLAG(COND,FLAG) \ |
| if (COND) SET_FLAG(FLAG); else CLEAR_FLAG(FLAG) |
| |
| #define F_PF_CALC 0x010000 /* PARITY flag has been calced */ |
| #define F_ZF_CALC 0x020000 /* ZERO flag has been calced */ |
| #define F_SF_CALC 0x040000 /* SIGN flag has been calced */ |
| |
| #define F_ALL_CALC 0xff0000 /* All have been calced */ |
| |
| /* |
| * Emulator machine state. |
| * Segment usage control. |
| */ |
| #define SYSMODE_SEG_DS_SS 0x00000001 |
| #define SYSMODE_SEGOVR_CS 0x00000002 |
| #define SYSMODE_SEGOVR_DS 0x00000004 |
| #define SYSMODE_SEGOVR_ES 0x00000008 |
| #define SYSMODE_SEGOVR_FS 0x00000010 |
| #define SYSMODE_SEGOVR_GS 0x00000020 |
| #define SYSMODE_SEGOVR_SS 0x00000040 |
| #define SYSMODE_PREFIX_REPE 0x00000080 |
| #define SYSMODE_PREFIX_REPNE 0x00000100 |
| #define SYSMODE_PREFIX_DATA 0x00000200 |
| #define SYSMODE_PREFIX_ADDR 0x00000400 |
| #define SYSMODE_INTR_PENDING 0x10000000 |
| #define SYSMODE_EXTRN_INTR 0x20000000 |
| #define SYSMODE_HALTED 0x40000000 |
| |
| #define SYSMODE_SEGMASK (SYSMODE_SEG_DS_SS | \ |
| SYSMODE_SEGOVR_CS | \ |
| SYSMODE_SEGOVR_DS | \ |
| SYSMODE_SEGOVR_ES | \ |
| SYSMODE_SEGOVR_FS | \ |
| SYSMODE_SEGOVR_GS | \ |
| SYSMODE_SEGOVR_SS) |
| #define SYSMODE_CLRMASK (SYSMODE_SEG_DS_SS | \ |
| SYSMODE_SEGOVR_CS | \ |
| SYSMODE_SEGOVR_DS | \ |
| SYSMODE_SEGOVR_ES | \ |
| SYSMODE_SEGOVR_FS | \ |
| SYSMODE_SEGOVR_GS | \ |
| SYSMODE_SEGOVR_SS | \ |
| SYSMODE_PREFIX_DATA | \ |
| SYSMODE_PREFIX_ADDR) |
| |
| #define INTR_SYNCH 0x1 |
| #define INTR_ASYNCH 0x2 |
| #define INTR_HALTED 0x4 |
| |
| typedef struct { |
| struct i386_general_regs gen; |
| struct i386_special_regs spc; |
| struct i386_segment_regs seg; |
| /* |
| * MODE contains information on: |
| * REPE prefix 2 bits repe,repne |
| * SEGMENT overrides 5 bits normal,DS,SS,CS,ES |
| * Delayed flag set 3 bits (zero, signed, parity) |
| * reserved 6 bits |
| * interrupt # 8 bits instruction raised interrupt |
| * BIOS video segregs 4 bits |
| * Interrupt Pending 1 bits |
| * Extern interrupt 1 bits |
| * Halted 1 bits |
| */ |
| long mode; |
| u8 intno; |
| volatile int intr; /* mask of pending interrupts */ |
| int debug; |
| #ifdef DEBUG |
| int check; |
| u16 saved_ip; |
| u16 saved_cs; |
| int enc_pos; |
| int enc_str_pos; |
| char decode_buf[32]; /* encoded byte stream */ |
| char decoded_buf[256]; /* disassembled strings */ |
| #endif |
| } X86EMU_regs; |
| |
| /**************************************************************************** |
| REMARKS: |
| Structure maintaining the emulator machine state. |
| |
| MEMBERS: |
| x86 - X86 registers |
| mem_base - Base real mode memory for the emulator |
| mem_size - Size of the real mode memory block for the emulator |
| ****************************************************************************/ |
| typedef struct { |
| X86EMU_regs x86; |
| unsigned long mem_base; |
| unsigned long mem_size; |
| void* private; |
| } X86EMU_sysEnv; |
| |
| #pragma pack() |
| |
| /*----------------------------- Global Variables --------------------------*/ |
| |
| #ifdef __cplusplus |
| extern "C" { /* Use "C" linkage when in C++ mode */ |
| #endif |
| |
| /* Global emulator machine state. |
| * |
| * We keep it global to avoid pointer dereferences in the code for speed. |
| */ |
| |
| extern X86EMU_sysEnv _X86EMU_env; |
| #define M _X86EMU_env |
| |
| /*-------------------------- Function Prototypes --------------------------*/ |
| |
| /* Function to log information at runtime */ |
| |
| /*void printk(const char *fmt, ...); */ |
| |
| #ifdef __cplusplus |
| } /* End of "C" linkage for C++ */ |
| #endif |
| |
| #endif /* __X86EMU_REGS_H */ |
