interrupt.asm

保护模式下8259A芯片编程及中断处理探究

[BITS 32]
[GLOBAL pyos_asm_interrupt_handle_for_default]
[EXTERN pyos_interrupt_handle_for_default]
[SECTION .text]

pyos_asm_interrupt_handle_for_default:
  ;保护现场
  pushad
  ;调用相应的C++处理函数
  call pyos_interrupt_handle_for_default  
  ;告诉硬件中断处理完毕，即发送 EOI 消息
  mov al , 0x20
  out 0x20 , al
  out 0xa0 , al
  ;恢复现场  
  popad
  ;返回
  iret