inline hook疑问 ,为什么蓝？

源代码如下：
MyNtGetContextThread proc ThreadHandle,ThreadContext
ret
MyNtGetContextThread endp
OldNtGetContextThread proc ThreadHandle,ThreadContext
        nop
        nop
        mov eax,NtGetContextThread_Addr
        add eax,5
        jmp eax

OldNtGetContextThread endp
DriverEntry proc pDriverObject:PDRIVER_OBJECT,pRegistryPath:PUNICODE_STRING

        pushad
        cli 
        mov eax, cr0 
        and eax,0fffeffffh
        mov cr0, eax 
        
        invoke KeRaiseIrqlToDpcLevel
        mov oldIrql,eax
        
invoke MmGetSystemRoutineAddress,$CCOUNTED_UNICODE_STRING("NtGetContextThread")
        
        mov NtGetContextThread_Addr,eax
        mov ecx,5
        mov esi,eax
        mov edi,offset OldNtGetContextThread
        rep movsb
        mov edx,offset MyNtGetContextThread
        sub edx,eax
        sub edx,5
        mov byte ptr [eax],0e9h
        xchg [eax+1],edx
        
        invoke KeLowerIrql,oldIrql
        
        mov eax, cr0
        or eax,10000h
        mov cr0, eax 
        sti 
        
        mov eax,pDriverObject
        assume eax:ptr DRIVER_OBJECT
        mov [eax].DriverUnload,offset DriverUnload
        assume eax:nothing


        popad
        mov eax,STATUS_SUCCESS
        ret

DriverEntry endp

end DriverEntry
我想知道为什么蓝

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