Home

Lecture 08: 02 October 2024

  1. How does the kernel know a program is doing something illegal?
  2. Control flow for hardware exceptions
  3. Follow message from dmesg to hardware
  4. Other kinds of exceptions 1. Traps: intentionally switch to kernel mode to run code but can return to where we left off 1. Faults: go into kernel mode as side effect, e.g. page fault (normal and excepted if not in working set) 1. Aborts: generally unrecoverable errors, double & triple faults or machine errors, OS bugs
  5. Exceptions are a type of interrupt, along with: 1. hardware interrupts (IRQs: Interrupts Requests) 1. software interrupts (IPIs: Inter-process interrupts)

https://kdlp.underground.software/articles/kernel_basics.html