How interactive theorem provers (Isabelle/HOL) guarantee the mathematical absence of buffer overflows, null pointer dereferences, and memory leaks in automotive operating systems.
In seL4, threads have no ambient authority. Every system call requires presenting an unforgeable cryptographic-like capability token stored in kernel space. Threads cannot access memory, trigger IPC, or configure interrupts unless an explicit capability has been explicitly granted by the system architect.
Historically, microkernels suffered from slow Inter-Process Communication (IPC). seL4 features a hand-tuned assembly fastpath that transfers small payloads directly through CPU hardware registers, reducing IPC latency to under 200 CPU cycles—faster than standard Linux context switches.