The God's Boolean - ModeBit
?? AJ Godahewa
4x Certified Software Technical Architect | 13x Certified Java Enthusiast | Java Community Process Member | DevOps Institute Ambassador | R&D Engineer | Secure Coding | AI Student @ Caltech
Intro
To understtand the intricate workings of modern operating systems, it is essential to grasp the fundamental concepts of user mode and kernel mode. These two operational states are fundamental to how systems manage and execute tasks. These two states are managed through a single bit called "mode-bit".
User Mode vs. Kernel Mode
User Mode
Kernel Mode
The Role of Privileged Instructions
Privileged instructions are specialized commands exclusively executable in kernel mode. They provide direct hardware access and control over critical system operations.
Why Privileged Instructions?
Common Examples of Privileged Instructions:
My Conclusion
The concepts of user mode, kernel mode, and privileged instructions are fundamental to understanding how modern operating systems function. By carefully managing process privileges and restricting privileged instruction execution to the kernel, operating systems ensure system security, stability, and efficiency.
Associate Technical Architect at HCL
4 个月Interesting