What does privileged mode means in arm processor?

Answer 1

Privileged mode in an ARM processor refers to a state of operation where the CPU has access to all system resources and can execute sensitive instructions that control hardware and manage memory. This mode is typically used by the operating system's kernel to perform critical tasks, such as managing interrupts and accessing protected areas of memory. In contrast, user mode restricts access to certain instructions and resources to ensure system stability and security. Transitioning between these modes is essential for maintaining system integrity and enforcing security policies.