嵌入式实时多分区操作系统两态访问的研究  

Research on Accessing between Two Modes of Embedded Multiple Partition Operating Systems

作　　者：仝敏[1] 张东[1] 

机构地区：[1]中航工业西安航空计算技术研究所,陕西西安710068

出　　处：《航空计算技术》2014年第6期88-91,共4页Aeronautical Computing Technique

基　　金：国家核高基重大专项项目(2012ZX01041-002-003)

摘　　要：为了保证不同程序的特权,嵌入式实时多分区操作系统使用系统态和用户态来解决这一问题。在介绍系统态和用户态的基础上,重点研究了嵌入式实时多分区操作系统中系统态和用户态互访,提出了系统调用、虚中断和共享数据区三种可行的访问方式,并针对三种访问方式给出了实现方法。这三种访问方式使用方便、灵活,能够有效地解决多分区操作系统两态互访问题。User mode and supervisor mode of embedded multiple partition operating systems are presented to protect different codes running under different privilege level. This article briefly introduces the user mode and supervisor mode, and deeply researches and implements three methods to access between user mode and supervisor mode, they are system call, pseudo interrupt, and shared data. The use of three ac- cess methods is convenient and flexible, they can resolve accessing question between two modes effectively.

关 键 词：系统态 用户态 系统调用 虚中断 共享数据区 

分 类 号：TP316[自动化与计算机技术—计算机软件与理论]