What is the state of the processor when cpu executes operating system code
In this issue, the editor will bring you about the state of the processor when cpu executes the operating system code. The article is rich in content and analyzes and describes for you from a professional point of view. I hope you can get something after reading this article.
When cpu executes operating system code, the processor is said to be in a tubular state. Tube state, also known as privileged state, system state or nuclear state of mind, is the state in which the machine is in when the program managed by the operating system is executed. Most computer systems divide the CPU execution state into the target state and the tube state.
When CPU executes operating system code, the processor is said to be in a tubular state.
Introduction to related knowledge points:
Tube state, also known as privileged state, system state or nuclear state of mind, is the state in which the machine is in when the program managed by the operating system is executed.
Most computer systems divide the CPU execution state into the target state and the tube state. The state of CPU belongs to a bit of the program status word PSW, system mode (0), user mode (1). CPU executes operating system programs and user programs alternately.
When the CPU processes the system program, the CPU changes to the tubular state, and the CPU can execute the full set of instructions in the tubular state. (including privileged and unprivileged instructions)
The above is the state of the processor when the cpu executes the operating system code shared by the editor. If you happen to have similar doubts, please refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.
