Archipelago » qemu

/* NOTE: this header is included in op-i386.c where global register

   variable are used. Care must be used when including glibc headers.

 */

#ifndef CPU_I386_H

#define CPU_I386_H

#include <setjmp.h>

#define R_EAX 0

#define R_ECX 1

#define R_EDX 2

#define R_EBX 3

#define R_ESP 4

#define R_EBP 5

#define R_ESI 6

#define R_EDI 7

#define R_AL 0

#define R_CL 1

#define R_DL 2

#define R_BL 3

#define R_AH 4

#define R_CH 5

#define R_DH 6

#define R_BH 7

#define R_ES 0

#define R_CS 1

#define R_SS 2

#define R_DS 3

#define R_FS 4

#define R_GS 5

#define CC_C           0x0001

#define CC_P         0x0004

#define CC_A        0x0010

#define CC_Z        0x0040

#define CC_S    0x0080

#define CC_O    0x0800

#define TRAP_FLAG                0x0100

#define INTERRUPT_FLAG                0x0200

#define DIRECTION_FLAG                0x0400

#define IOPL_FLAG_MASK                0x3000

#define NESTED_FLAG                0x4000

#define BYTE_FL                        0x8000        /* Intel reserved! */

#define RF_FLAG                        0x10000

#define VM_FLAG                        0x20000

/* AC                                0x40000 */

#define EXCP00_DIVZ        1

#define EXCP01_SSTP        2

#define EXCP02_NMI        3

#define EXCP03_INT3        4

#define EXCP04_INTO        5

#define EXCP05_BOUND        6

#define EXCP06_ILLOP        7

#define EXCP07_PREX        8

#define EXCP08_DBLE        9

#define EXCP09_XERR        10

#define EXCP0A_TSS        11

#define EXCP0B_NOSEG        12

#define EXCP0C_STACK        13

#define EXCP0D_GPF        14

#define EXCP0E_PAGE        15

#define EXCP10_COPR        17

#define EXCP11_ALGN        18

#define EXCP12_MCHK        19

#define EXCP_SIGNAL        256 /* async signal */

enum {

    CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */

    CC_OP_EFLAGS,  /* all cc are explicitely computed, CC_SRC = flags */

    CC_OP_MUL, /* modify all flags, C, O = (CC_SRC != 0) */

    CC_OP_ADDB, /* modify all flags, CC_DST = res, CC_SRC = src1 */

    CC_OP_ADDW,

    CC_OP_ADDL,

    CC_OP_ADCB, /* modify all flags, CC_DST = res, CC_SRC = src1 */

    CC_OP_ADCW,

    CC_OP_ADCL,

    CC_OP_SUBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */

    CC_OP_SUBW,

    CC_OP_SUBL,

    CC_OP_SBBB, /* modify all flags, CC_DST = res, CC_SRC = src1 */

    CC_OP_SBBW,

    CC_OP_SBBL,

    CC_OP_LOGICB, /* modify all flags, CC_DST = res */

    CC_OP_LOGICW,

    CC_OP_LOGICL,

    CC_OP_INCB, /* modify all flags except, CC_DST = res, CC_SRC = C */

    CC_OP_INCW,

    CC_OP_INCL,

    CC_OP_DECB, /* modify all flags except, CC_DST = res, CC_SRC = C  */

    CC_OP_DECW,

    CC_OP_DECL,

    CC_OP_SHLB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */

    CC_OP_SHLW,

    CC_OP_SHLL,

    CC_OP_SARB, /* modify all flags, CC_DST = res, CC_SRC.lsb = C */

    CC_OP_SARW,

    CC_OP_SARL,

    CC_OP_NB,

};

#ifdef __i386__

//#define USE_X86LDOUBLE

#endif

#ifdef USE_X86LDOUBLE

typedef long double CPU86_LDouble;

#else

typedef double CPU86_LDouble;

#endif

typedef struct CPUX86State {

    /* standard registers */

    uint32_t regs[8];

    uint32_t pc; /* cs_case + eip value */

    uint32_t eflags;

    /* emulator internal eflags handling */

    uint32_t cc_src;

    uint32_t cc_dst;

    uint32_t cc_op;

    int32_t df; /* D flag : 1 if D = 0, -1 if D = 1 */

    /* segments */

    uint8_t *segs_base[6];

    /* FPU state */

    unsigned int fpstt; /* top of stack index */

    unsigned int fpus;

    unsigned int fpuc;

    uint8_t fptags[8];   /* 0 = valid, 1 = empty */

    CPU86_LDouble fpregs[8];    

    /* segments */

    uint32_t segs[6];

    /* emulator internal variables */

    CPU86_LDouble ft0;

    /* exception handling */

    jmp_buf jmp_env;

    int exception_index;

} CPUX86State;

static inline int ldub(void *ptr)

{

    return *(uint8_t *)ptr;

}

static inline int ldsb(void *ptr)

{

    return *(int8_t *)ptr;

}

static inline int lduw(void *ptr)

{

    return *(uint16_t *)ptr;

}

static inline int ldsw(void *ptr)

{

    return *(int16_t *)ptr;

}

static inline int ldl(void *ptr)

{

    return *(uint32_t *)ptr;

}

static inline uint64_t ldq(void *ptr)

{

    return *(uint64_t *)ptr;

}

static inline void stb(void *ptr, int v)

{

    *(uint8_t *)ptr = v;

}

static inline void stw(void *ptr, int v)

{

    *(uint16_t *)ptr = v;

}

static inline void stl(void *ptr, int v)

{

    *(uint32_t *)ptr = v;

}

static inline void stq(void *ptr, uint64_t v)

{

    *(uint64_t *)ptr = v;

}

/* float access */

static inline float ldfl(void *ptr)

{

    return *(float *)ptr;

}

static inline double ldfq(void *ptr)

{

    return *(double *)ptr;

}

static inline void stfl(void *ptr, float v)

{

    *(float *)ptr = v;

}

static inline void stfq(void *ptr, double v)

{

    *(double *)ptr = v;

}

#ifndef IN_OP_I386

void cpu_x86_outb(int addr, int val);

void cpu_x86_outw(int addr, int val);

void cpu_x86_outl(int addr, int val);

int cpu_x86_inb(int addr);

int cpu_x86_inw(int addr);

int cpu_x86_inl(int addr);

#endif

CPUX86State *cpu_x86_init(void);

int cpu_x86_exec(CPUX86State *s);

void cpu_x86_close(CPUX86State *s);

/* internal functions */

int cpu_x86_gen_code(uint8_t *gen_code_buf, int max_code_size, 

                     int *gen_code_size_ptr, uint8_t *pc_start);

void cpu_x86_tblocks_init(void);

#endif /* CPU_I386_H */