interrupt.asm

asm
%macro ISR_NOERRCODE 1 ; nasm宏：定义ISR_NOERRCODE，接收一个参数
[global isr%1] ; %1代表第一个参数
isr%1:
    cli
    push byte 0
    push %1
    jmp isr_common_stub
%endmacro

%macro ISR_ERRCODE 1
[global isr%1]
isr%1:
    cli
    push %1
    jmp isr_common_stub
%endmacro

ISR_NOERRCODE 0
ISR_NOERRCODE 1
ISR_NOERRCODE 2
ISR_NOERRCODE 3
ISR_NOERRCODE 4
ISR_NOERRCODE 5
ISR_NOERRCODE 6
ISR_NOERRCODE 7
ISR_ERRCODE 8
ISR_NOERRCODE 9
ISR_ERRCODE 10
ISR_ERRCODE 11
ISR_ERRCODE 12
ISR_ERRCODE 13
ISR_ERRCODE 14
ISR_NOERRCODE 15
ISR_NOERRCODE 16
ISR_ERRCODE 17
ISR_NOERRCODE 18
ISR_NOERRCODE 19
ISR_NOERRCODE 20
ISR_ERRCODE 21
ISR_NOERRCODE 22
ISR_NOERRCODE 23
ISR_NOERRCODE 24
ISR_NOERRCODE 25
ISR_NOERRCODE 26
ISR_NOERRCODE 27
ISR_NOERRCODE 28
ISR_NOERRCODE 29
ISR_NOERRCODE 30
ISR_NOERRCODE 31

[extern isr_handler] ; 将会在isr.c中被定义

; 通用中断处理程序
isr_common_stub:
    pusha

    mov ax, ds
    push eax ; 存储ds

    mov ax, 0x10 ; 将内核数据段赋值给各段
    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax
    call isr_handler ; call isr_headler(registers_t reg);
    pop eax ; 恢复
    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax

    popa

    add esp, 8 ; 弹出错误码和中断ID
    iret

%macro IRQ 2
global irq%1
irq%1:
    cli
    push byte 0
    push %2
    jmp irq_common_stub
%endmacro

IRQ 0, 32
IRQ 1, 33
IRQ 2, 34
IRQ 3, 35
IRQ 4, 36
IRQ 5, 37
IRQ 6, 38
IRQ 7, 39
IRQ 8, 40
IRQ 9, 41
IRQ 10, 42
IRQ 11, 43
IRQ 12, 44
IRQ 13, 45
IRQ 14, 46
IRQ 15, 47

[extern irq_handler]
; 通用中断处理程序
irq_common_stub:
    pusha ; 存储所有寄存器

    mov ax, ds
    push eax ; 存储ds

    mov ax, 0x10 ; 将内核数据段赋值给各段
    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax

    call irq_handler ; 调用C语言处理函数

    pop eax ; 恢复各段
    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax

    popa ; 弹出所有寄存器

    add esp, 8 ; 弹出错误码和中断ID
    iret ; 从中断返回
interrupt.asm ​

interrupt.asm
