求教,写了一个函数来读取一段内存数据,可是没有见到预期的数据

VOID    ReadMemData(ULONG desAddr,PVOID pInBuf, int dataSize)
{

    ASSERT(dataSize<=MAXWRITESIZE);
    
    WCHAR tempBuf[MAXWRITESIZE]=L"" ;
    UNICODE_STRING sourceBuf;
    sourceBuf.Buffer = tempBuf;
    sourceBuf.MaximumLength = MAXWRITESIZE;
    sourceBuf.Length = (USHORT)dataSize;
    
    //pInBuf 是用来传入数据的暂时没有用到
    KdPrint(("%wZ", (PUNICODE_STRING)pInBuf));
    ULONG sbuf = (ULONG)&sourceBuf;
    __asm
    {
        push ecx
        push esi
        push edi
        cld
        mov esi,desAddr
        mov edi,sbuf
        mov ecx,dataSize
        rep movsb
        pop edi
        pop esi
        pop ecx
    }
    KdPrint(("%wZ", &sourceBuf));
}    

NTSTATUS DriverEntry(PDRIVER_OBJECT pd, PUNICODE_STRING pu)
{    
    ULONG poi;
    int dsize = 5;
    UNICODE_STRING buf;
    RtlInitUnicodeString(&buf, L"love you");
    KdPrint(("%wZ", &buf));
    PVOID pbuf = (PVOID)&buf;
    poi = 0x805727C7;
    WriteMemData(poi, pbuf, dsize);
    return STATUS_SUCCESS;
}