; irq.s

; The IRQ and ISR code must be setup in Assembly before it can be used in C
; because the C compiler doesn't understand that the registers and stack are
; required to be preserved between the asm statements and it will corrupt the stack.
global kb_isr
global idt_load

; Keyboard ISR handler
extern kb_isr_handler

; idt_load is defined in irq.s and loads the IDT.
idt_load:
    mov edx, [esp + 4]
    lidt [edx]
    sti
    ret

kb_isr:
    pushad
    cld
    call kb_isr_handler
    popad
    iretd