.section .text

isr:
pushal              // save registers

pushl   %esp
add     $32, (%esp)
call    handle_interrupt

add     $4, %esp
popal               // restore registers
add     $8, %esp

iret

#define ISR_ERRCODE(ISR_NAME, INT_CODE) \
    .global ISR_NAME;                   \
    ISR_NAME:;                          \
    pushl   $INT_CODE;                  \
    jmp     isr;                        \

#define ISR_NO_ERRCODE(ISR_NAME, INT_CODE) \
    .global ISR_NAME;                      \
    ISR_NAME:;                             \
    pushl   $0;                            \
    pushl   $INT_CODE;                     \
    jmp     isr;                           \

// intel-defined
ISR_NO_ERRCODE(int_de, 0)
ISR_NO_ERRCODE(int_db, 1)
ISR_NO_ERRCODE(int_nmi, 2)
ISR_NO_ERRCODE(int_bp, 3)
ISR_NO_ERRCODE(int_of, 4)
ISR_NO_ERRCODE(int_br, 5)
ISR_NO_ERRCODE(int_ud, 6)
ISR_NO_ERRCODE(int_nm, 7)
ISR_ERRCODE(int_df, 8)
ISR_ERRCODE(int_ts, 10)
ISR_ERRCODE(int_np, 11)
ISR_ERRCODE(int_ss, 12)
ISR_ERRCODE(int_gp, 13)
ISR_ERRCODE(int_pf, 14)
ISR_NO_ERRCODE(int_mf, 16)
ISR_ERRCODE(int_ac, 17)
ISR_NO_ERRCODE(int_mc, 18)
ISR_NO_ERRCODE(int_xm, 19)
ISR_NO_ERRCODE(int_ve, 20)

// user-defined
ISR_NO_ERRCODE(pic_pit, 32)
ISR_NO_ERRCODE(pic_keyboard, 33)