嵌入式实时操作系统中系统调用方法的设计与实现

在高安全性的实时操作系统中支持两种运行形态:系统态和用户态。核心OS运行在系统态,应用运行在用户态。为有效保护核心OS的安全,用户态的应用通过系统调用的方式调用核心OS提供的功能接口。笔者在深入研究系统调用的基础上,设计并实现了一种系统调用方法。通过在某嵌入式实时操作系统中的实现,证明该方法是安全的、可行的、有效的。

Design and implementation of embedded real-time OS system call

There are two running models supported in high safe real-time OS:supervisor model and user model.Core OS runs in the state of supervisor model,and applications run in the state of user model.In order to protect the safety of core OS effectively.User mode applications call the function interface provided by core OS via system call.This paper design and implementation of a system call solution based on deeply research.Throngh realization of embedded real-time operating system in a certain,it proved that the method is safe,feasible and effective.