把你的check版丢一个出来吧

二楼的，看看我在这里发的自制xp sp2 pro checked盘的帖子吧，我用的就是我自己制作的，没钱买msdn。除此之外，你还可以按照msdn上介绍的方法在Free版系统上安装checked版内核文件。我试过，均能成功。^_^，我不会象驱动开发网的某些所谓的牛人那样吝啬自己的一张checked盘。

现在微软发布的公用调试符号中并没有这一变量

似乎直接下载的符号包少好些东西,用WinDbg连网下的好得多

//
// The reason of having these variables defined in here is to isolate
// ABIOS from current system.
//

//
// KiNumberFreeSelectors defines the number of available selectors for
// ABIOS specific drivers.  This number should be the same across all
// the processors.
//

static USHORT KiNumberFreeSelectors = 0;

感觉就在ntoskrnl.exe中。

//
// i386 misc routines
//
NTSTATUS
NTAPI
KeI386AllocateGdtSelectors(
    OUT PUSHORT SelectorArray,
    IN USHORT NumberOfSelectors
    );

NTSTATUS
KeI386AllocateGdtSelectors(
    OUT PUSHORT SelectorArray,
    IN USHORT NumberOfSelectors
    )

/*++

Routine Description:

    This function allocates a set of GDT selectors for a device driver to use.
    Usually this allocation is performed at device driver initialization time
    to reserve the selectors for later use.

Arguments:

    SelectorArray - Supplies a pointer to an array of USHORT to be filled
                    in with the GDT selectors allocated.

    NumberOfSelectors - Specifies the number of selectors to be allocated.

Return Value:

    STATUS_SUCCESS - If the requested selectors are allocated.

    STATUS_ABIOS_SELECTOR_NOT_AVAILABLE - if system can not allocate the number
                               of selectors requested.

--*/

{
    PKFREE_GDT_ENTRY GdtEntry;
    KIRQL OldIrql;

    if (KiNumberFreeSelectors >= NumberOfSelectors) {
        ExAcquireSpinLock(&KiAbiosGdtLock, &OldIrql);

        //
        // The Free Gdt link list is maintained on Processor 0's GDT ONLY.
        // Because the 'selector' is an offset to the beginning of GDT and
        // it should be the same across all the processors.
        //

        KiNumberFreeSelectors = KiNumberFreeSelectors - NumberOfSelectors;
        GdtEntry = KiFreeGdtListHead;
        while (NumberOfSelectors != 0) {
            *SelectorArray++ = (USHORT)((ULONG)GdtEntry - KiAbiosGdt[0]);
            GdtEntry = GdtEntry->Flink;
            NumberOfSelectors--;
        }
        KiFreeGdtListHead = GdtEntry;
        ExReleaseSpinLock(&KiAbiosGdtLock, OldIrql);
        return STATUS_SUCCESS;
    } else {
        return STATUS_ABIOS_SELECTOR_NOT_AVAILABLE;
    }
}

6楼的，你的WRK之哪个版本的？