{
    PKTHREAD Thread = KeGetCurrentThread();

    /* Don't even try at ISR level or later */
    if (KeGetCurrentIrql() > DISPATCH_LEVEL) return FALSE;

    /* Start with defaults */
    *StackBegin = Thread->StackLimit;
    *StackEnd = (ULONG_PTR)Thread->StackBase;

    /* Check if EBP is inside the stack */
    if ((*StackBegin <= Ebp) && (Ebp <= *StackEnd))
    {
        /* Then make the stack start at EBP */
        *StackBegin = Ebp;
    }
    else
    {
        /* Now we're going to assume we're on the DPC stack */
        *StackEnd = (ULONG_PTR)(KeGetPcr()->Prcb->DpcStack);
        *StackBegin = *StackEnd - KERNEL_STACK_SIZE;

        /* Check if we seem to be on the DPC stack */
        if ((*StackEnd) && (*StackBegin < Ebp) && (Ebp <= *StackEnd))
        {
            /* We're on the DPC stack */
            *StackBegin = Ebp;
        }
        else
        {
            /* We're somewhere else entirely... use EBP for safety */
            *StackBegin = Ebp;
            *StackEnd = (ULONG_PTR)PAGE_ALIGN(*StackBegin);
        }
    }

    /* Return success */
    return TRUE;
}

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