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interrupt.s
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.macro ISR_NOERRCODE num
.global isr\num
isr\num:
cli
pushl $0
pushl $\num
jmp isr_common_stub
.endm
.macro ISR_ERRCODE num
.global isr\num
isr\num:
cli
pushl $\num
jmp isr_common_stub
.endm
.macro IRQ irq_num isr_num
.global irq\irq_num
irq\irq_num:
cli
pushl $0
pushl $\isr_num
jmp irq_common_stub
.endm
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_NOERRCODE 17
ISR_NOERRCODE 18
ISR_NOERRCODE 19
ISR_NOERRCODE 20
ISR_NOERRCODE 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
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
isr_common_stub:
pusha # Push Stack
mov %ds, %ax # Push lower 16 bits of eax == ds
push %eax # Save the data segment descriptor
mov $0x10, %ax
mov %ax, %ds
mov %ax, %es
mov %ax, %fs
mov %ax, %gs
call isr_handler
pop %ebx # load the original data segment descrip
mov %bx, %ds
mov %bx, %es
mov %bx, %fs
mov %bx, %gs
popa
add $8, %esp
sti
iret
irq_common_stub:
pusha # Push Stack
mov %ds, %ax # Push lower 16 bits of eax == ds
push %eax # Save the data segment descriptor
mov $0x10, %ax
mov %ax, %ds
mov %ax, %es
mov %ax, %fs
mov %ax, %gs
call irq_handler
pop %ebx # load the original data segment descrip
mov %bx, %ds
mov %bx, %es
mov %bx, %fs
mov %bx, %gs
popa
add $8, %esp
sti
iret