Skip to content
Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

exception handler

The piece of kernel code the processor jumps to when a particular kind of exception or interrupt happens.

An exception handler is the kernel routine located through the exception vector (an IDT gate on x86-64, an offset from VBAR_EL1 on ARM64, stvec on RISC-V) for a given exception class; it saves the interrupted state, handles the event and returns with iretq, eret or sret.

See also

interrupt descriptor table struct return
Read the full section →