What Does Supervisor Mode Mean?
Supervisor mode is a mode of execution in a device in which all instructions, including privileged ones, can be performed by the processor. It is thus capable of executing both input/output operations and privileged operations. The operating system of a computer usually operates in this mode. Supervisor mode helps in preventing applications from corrupting the data of the operating system.
Techopedia Explains Supervisor Mode
Supervisor mode mostly deals with interpreting different commands and is capable of executing privileged instructions. It has full access to all components of a system and is mostly reserved for the operating system (OS) since OS routines run in supervisor mode. Supervisor mode is the automatic mode selected when a computer is powered on. It allows the initial programs executed in the computer, mainly the bootloader, BIOS and OS, to have unlimited access to the hardware. It is also the mode selected by the OS kernel for low-level tasks that require unrestricted hardware access.
