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.set IRQ_BASE, 0x20
.section .text
.extern handle_int
.global int_ignore
.macro handle_exception num
.global handle_exception\num
handle_exception\num:
movb $\num, (int_number)
movl $exch_\num, (int_handler)
jmp int_bottom
.endm
.macro handle_irq num
.global handle_irq\num
handle_irq\num:
movb $\num + IRQ_BASE, (int_number)
movl $irqh_\num, (int_handler)
jmp int_bottom
.endm
handle_irq 0x00
handle_irq 0x01
handle_exception 0x00
handle_exception 0x01
handle_exception 0x02
handle_exception 0x03
handle_exception 0x06
handle_exception 0x07
handle_exception 0x08
handle_exception 0x0D
int_ignore:
movb $0xFF, (int_number)
movl $0x00, (int_handler)
int_bottom:
cli
pushl %esp
push (int_number)
pushl (int_handler)
call handle_int
movl %eax, %esp // Set the stack pointer to the return value of handle_int
pop %eax
pop %eax
pop %eax
pop %eax
sti
hlt
.data
int_number: .byte 0
int_handler: .int 0
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