1. Sources of interrupts.
- External(hardware generated) Interrupts : Maskable
: Local APIC나 Processor의 핀을 통해 전달
- Software-nenerated interrupts : Unmaskable by E(R)FLAGS.IF
: INT n
2. Sources of Exceptions
- Processor-detected program-error executions
- Software-generated exceptions
- Machine-check Exceptions
Exceptions are classified as faults, traps, or aborts.
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