Interrupt Handler

Abstract

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• Also known as Interrupt Service Routine (ISR)
• A set of Instruction at a fixed address within Kernel, responding to the Interrupts (中断) like System Call (系统调用)

C Implementation

Any variables changed inside the interrupt handler should be declared with volatile

Example

• Trap Interrupt (陷入)
• System Call (系统调用)

Interrupt Handler Pointer

• Contains the Memory Address to the start of the Instructionof the Interrupts (中断)