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