【摘要】 32位操作系统的保护机制限制了用户态应用程序对端口的直接访问。文章讨论了I/O管理器的结构、内核态设备驱动程序模型及实现原理。在屏蔽位矩阵IOPM硬件保护技术的基础上,重点分析了基于WDM驱动程序对I/O端口的访问方法,并给出了程序实例。实际应用表明,此方法具有较强的I/O端口管理能力。更多还原

【Abstract】 The user applications can’t directly access I/O ports for the limitation of protection mechanism under win32. The structure of I/O manager is discussed. The model and Implementation principle of kernel state device driver are discussed too. How to access I/O ports based on WDM driver is intensively analyzed on the foundation of hardware protection technology of IOPM and program example is given. Application shows that this method is of strong management capability to I/O ports.更多还原