2.１.ReactOS系统中中断描述符表进行初始化
2.１.ReactOS系统中中断描述符表进行初始化
2.１.ReactOS系统中中断描述符表进行初始化
VOID
INIT_FUNCTION
NTAPI
KeInitExceptions(VOID)
{
ULONG i;
USHORT FlippedSelector;
extern KIDTENTRY KiIdt[MAXIMUM_IDTVECTOR];
/* Loop the IDT */
for (i = 0; i <= MAXIMUM_IDTVECTOR; i ++)
{
/* Save the current Selector */
FlippedSelector = KiIdt[i].Selector;
/* Flip Selector and Extended Offset */
KiIdt[i].Selector = KiIdt[i].ExtendedOffset;
KiIdt[i].ExtendedOffset = FlippedSelector;
}
}
用for循环对中断描述符表进行初始化
中断描述符结构体
//
// IDT Entry Definition
//
typedef struct _KIDTENTRY
{
USHORT Offset;
USHORT Selector;
USHORT Access;
USHORT ExtendedOffset;
} KIDTENTRY, *PKIDTENTRY;
#define MAXIMUM_IDTVECTOR 0xFF