#pragma pack(1)    // 2 works, too

typedef struct tagIDT

{

    WORD    wLimit;

    DWORD    dwBase;

} IDT, *PIDT;

#pragma pack()



VOID LoadIDT(OUT PIDT pIdt )

{

    __asm {

        MOV EAX, [pIdt]  // load offset into EAX

        SIDT [EAX]

    }

}



#pragma pack(1)

typedef struct tagINT_VECTOR {

    WORD    wLowOffset;        // LOWORD of the handler's offset

    WORD    wSelector;        // selector of the handler's offset

    BYTE    bAccess;        // 0-3: Type

                            // 4:    ?(=0)

                            // 5-6:    DPL

                            // 7:    Present

    BYTE    wUnused;        // 0, 0, 0, unused (binary)

    WORD    wHighOffset;    // HIWORD of the handler's offset

} INT_VECTOR, *PINT_VECTOR;

#pragma pack()	



VOID LoadINTVector( IN PIDT pIdt, IN UCHAR iVector, OUT PINT_VECTOR pVector ) {

    __try {

        DWORD dwBase = pIdt->dwBase + iVector * sizeof(INT_VECTOR);

        memcpy( pVector, (const void *)dwBase, sizeof(INT_VECTOR) );

    }

    __except( 1 ) {

        TRACE( "LoadINTVector failed: Exception\n" );

		return;

    }



    TRACE( "LoadINTVector: Vector 0x%.2X successfully dumped\n", iVector);

}



int tst_IDT () { 

	

	IDT idt;

	ULONG i=0x03; //breakpoint handler

	INT_VECTOR	Vec;

	LoadIDT(&idt);

	LoadINTVector( &idt, (UCHAR)i, &Vec);



	//read the value corresponding to the breakpoint vector..



	return 0;

}

CreateFile("\\\\.\\MemMap", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);