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b/docs/Application_guide/zh/system/exceptional-handling.md index 6f814610877acccfc3a7e2c293fed629deba9274..0e2de041f199d267f867de711f8eef332649e3c9 100644 --- a/docs/Application_guide/zh/system/exceptional-handling.md +++ b/docs/Application_guide/zh/system/exceptional-handling.md @@ -5,7 +5,7 @@ ### 概述 #### 异常的概念 -处理器正常的执行流程一般跑在用户模式中，PC在运行时依次向前取，基本上时顺序执行。异常指的是处理器在正常执行程序的过程中，遇到了硬件错误、指令执行错误、用户程序请求服务、内存访问异常、取指令异常等特殊事件，无法继续正常的运行流程，需要立即处理前述特殊事件的过程。 +处理器正常的执行流程一般运行在用户模式中，此时CPU 随程序寄存器内递增的地址，依次取指令并运行，这个过程会不断循环，直到程序执行结束。异常指的是处理器在正常执行程序的过程中，遇到了硬件错误、指令执行错误、用户程序请求服务、内存访问异常、取指令异常等特殊事件，无法继续正常的运行流程，需要立即处理前述特殊事件的过程。 #### CPU的工作模式