Real-time and embedded systems operate in constrained environments in which memory and processing power are limited. They must provide their services within strict time deadlines to their users and to ...

Linux processes are made up of text, data, and BSS static segments; in addition, each process has its own stack (which is created with the fork system call). Heap space for Linux tasks are allocated ...

Every operating system- whether it is Windows, Mac, Linux, or Android, has a core program called a Kernel which acts as the ‘boss’ for the whole system. It is the heart of the OS! The Kernel is ...

Modern CPUs can run in two modes: kernel mode and user mode. When a CPU runs in kernel mode, an extended set of instructions is allowed, as is free access to anywhere in memory and device registers.

A fundamental overview of operating systems (OSes) with an emphasis on practice. Topics covered include: OS structure, OS models, OS abstractions, concurrency sources, concurrency challenges, ...

However, SeL4 can be used, in theory, as a foundation for Linux and other Unix related operating systems. For example, it was briefly considered for use in Richard M. Stallman's still-born Gnu Hurd ...