Abstract
An Ada tasking kernel is implemented as a layer beneath the Linux operating system. This provides low overhead and precise control of execution timing for real-time Ada tasks, which execute within the Linux kernel address space, while allowing the Linux operating system to execute non-real-time tasks in the background. The Ada tasking kernel is derived from Yodaiken's Real-Time Linux kernel, with new scheduling and synchronization primitives specifically to support the GNAT Ada runtime system. Implementing the Ada tasking primitives directly on the hardware does not just lower execution overhead and improve control over execution timing; it also opens the door for a simple restricted-tasking runtime system that could be certified for safety-critical applications.
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