嵌入式单地址空间操作系统动态加载的研究

目前某些非智能手机或嵌入式系统由于不是虚拟地址空间,无法动态加载应用程序和更新系统软件,如果更新需要重新编译链接整个系统软件,限制了嵌入式系统灵活性和扩展性,若能实现模块和应用程序的动态加载,可以提高系统的灵活性和扩展性。本文从理论上详细分析动态加载需要解决的问题,如动态模块的执行,地址无关的代码和系统接口的调用等问题,并给出了详细的参考实现,并在非智能手机平台上作了验证,可以实现设计的动态加载。本文最后对动态加载的系统安全和进一步的扩展做出了分析。

Research on embedded single address space OS in dynamic loading

Presently some feature phone and embedded OS aren’t virtual address, they can’t update modules or load new application dynamically, it needs re-compile and link all system software, this will limit the flexibility and extension of the system. If we can implement the dynamic load of the module and application, we will improve the system flexibility and extension. This paper introduces the dynamic load solution, such as run the dynamic module, position independence code and the call of system interface, it gives the reference implantation also, and verified in one feature phone, it works as design. At last, the paper analyzes the system security and next step extension.