[EXTERN isr]

%macro ISR_NOERRCODE 1
[GLOBAL isr%1]
isr%1:
    cli
    push byte 0
    push byte %1
    jmp isr_common_stub
%endmacro

%macro ISR_ERRCODE 1
[GLOBAL isr%1]
isr%1:
    cli
    push byte %1
    jmp isr_common_stub
%endmacro

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_NOERRCODE 8
ISR_NOERRCODE 9
ISR_NOERRCODE 10
ISR_NOERRCODE 11
ISR_NOERRCODE 12
ISR_NOERRCODE 13
ISR_NOERRCODE 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

isr_common_stub:
   pusha ; Pushes edi,esi,ebp,esp,ebx,edx,ecx,eax

   mov ax, ds ; Lower 16-bits of eax = ds.
   push eax ; save the data segment descriptor

   mov ax, 0x10 ; load the kernel data segment descriptor
   mov ds, ax
   mov es, ax
   mov fs, ax
   mov gs, ax

   call isr

   pop eax ; reload the original data segment descriptor
   mov ds, ax
   mov es, ax
   mov fs, ax
   mov gs, ax

   popa                     ; Pops edi,esi,ebp...
   add esp, 8 ; Cleans up the pushed error code and pushed ISR number
   sti
   iret ; pops 5 things at once: CS, EIP, EFLAGS, SS, and ESP