diff options
Diffstat (limited to 'src/interrupt_stub.s')
| -rw-r--r-- | src/interrupt_stub.s | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/interrupt_stub.s b/src/interrupt_stub.s new file mode 100644 index 0000000..618c982 --- /dev/null +++ b/src/interrupt_stub.s @@ -0,0 +1,54 @@ + +.set IRQ_BASE, 0x20 + +.section .text + +.extern handle_int +.global int_ignore + + +.macro handle_exception num +.global handle_irq\num +handle_irq\num: + movb $\num, (int_number) + jmp int_bottom +.endm + +.macro handle_irq num +.global handle_irq\num +handle_irq\num: + movb $\num + IRQ_BASE, (int_number) + jmp int_bottom +.endm + +handle_irq 0x00 +handle_irq 0x01 +handle_exception 0x0D + +int_bottom: + pop %eax + push int_bottom + pusha + pushl %ds + pushl %es + pushl %fs + pushl %gs + + pushl %esp + pushl %eax + push (int_number) + call handle_int + movl %eax, %esp // Set the stack pointer to the return value of handle_int + + popl %gs + popl %fs + popl %es + popl %ds + popa + +int_ignore: + + iret + +.data + int_number: .byte 0 |