WDM驱动程序开发中数据访问的冲突与保护分析

In the WDM driver development, data security is essential. This paper discusses the issue of conflict and protection of data access in WDM development . In the single-processor systems, the data access conflict generates because routines of different IRQL compete with each other, so we may solve the problem by enhancing the IRQL; But in the Multi-processor systems, the reason mentioned above is not the only. The more important reason is that different processors compete with each other. So we must solve the problem by Spin lock. This paper explains the conceptions of IRQL and Spin Lock, and introduces some matters needing attention in using IRQL or Spin Lock. In addition, we introduce several lock functions that supplied by DDK and explain their usages by a development example.