OPPO Kernel Craftsman
Apr 30, 2020 · Fundamentals
Detailed Explanation of ARMv8 Exception Handling Process
The article provides a thorough walkthrough of ARMv8 exception handling, describing the four exception levels (EL0‑EL3) and their dedicated stack and status registers, distinguishing synchronous and asynchronous faults, and detailing the vector table, entry routine, ESR‑based type decoding, handling steps such as do_mem_abort, and context restoration, illustrated with a Data Abort case.
ARMv8ELRESR
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