; C ISR routine
[extern isr]

; Macro for creating a single ISR label
; We need to push a junk value on the stack first
; if the interrupt number is not 8 or 10-14.
; This is to properly align the stack for both exceptions
; having and not having error codes.
%macro isr_label 1
[global isr_%1]
isr_%1:
    %if ( (%1 != 8) && (%1 < 10 || %1 > 14) )
        push    eax                 ; junk value to take error code stack space
    %endif
    push    eax
    mov     al, %1                  ; save interrupt number in al
    jmp     isr_common
%endmacro

; Loop to create all of our ISR labels
%assign i 0
%rep 50
    isr_label i
    %assign i i+1
%endrep

; The common ISR routine
isr_common:
    push    ebx
    push    ecx
    push    edx
    push    edi
    push    esi
    push    ebp
    push    ds
    push    es
    push    fs
    push    gs

    push    esp
    push    eax
; TODO: currently commented since there is no isr()
; so the build will not break
;    call    isr
    add     esp, 8

    pop     gs
    pop     fs
    pop     es
    pop     ds
    pop     ebp
    pop     esi
    pop     edi
    pop     edx
    pop     ecx
    pop     ebx
    pop     eax                     ; error code can be ignored now
    pop     eax

    iret