bits 32

; !!!  ISRs  !!!
global isr_exception_0
global isr_exception_1
global isr_exception_2
global isr_exception_3
global isr_exception_4
global isr_exception_5
global isr_exception_6
global isr_exception_7
global isr_exception_8
global isr_exception_9
global isr_exception_10
global isr_exception_11
global isr_exception_12
global isr_exception_13
global isr_exception_14
global isr_exception_15
global isr_exception_16
global isr_exception_17
global isr_exception_18
global isr_exception_19
global isr_exception_20
global isr_exception_21
global isr_exception_22
global isr_exception_23
global isr_exception_24
global isr_exception_25
global isr_exception_26
global isr_exception_27
global isr_exception_28
global isr_exception_29
global isr_exception_30
global isr_exception_31

isr_exception_0:
      cli
      push byte 0; A normal ISR stub that pops a dummy error code to keep a
                   ; uniform stack frame
      push byte 0
      jmp isr_common_stub
isr_exception_1:
      cli
      push byte 0
      push byte 1
      jmp isr_common_stub
isr_exception_2:
      cli
      push byte 0
      push byte 2
      jmp isr_common_stub
isr_exception_3:
      cli
      push byte 0
      push byte 3
      jmp isr_common_stub
isr_exception_4:
      cli
      push byte 0
      push byte 4
      jmp isr_common_stub
isr_exception_5:
      cli
      push byte 0
      push byte 5
      jmp isr_common_stub
isr_exception_6:
      cli
      push byte 0
      push byte 6
      jmp isr_common_stub
isr_exception_7:
      cli
      push byte 0
      push byte 7
      jmp isr_common_stub
isr_exception_8:
      cli
      push byte 8
      jmp isr_common_stub
isr_exception_9:
      cli
      push byte 0
      push byte 9
      jmp isr_common_stub      
isr_exception_10:
      cli
      push byte 10
      jmp isr_common_stub
isr_exception_11:
      cli
      push byte 11
      jmp isr_common_stub
isr_exception_12:
      cli
      push byte 12
      jmp isr_common_stub
isr_exception_13:
      cli
      push byte 13
      jmp isr_common_stub
isr_exception_14:
      cli
      push byte 14
      jmp isr_common_stub
isr_exception_15:
      cli
      push byte 0
      push byte 15
      jmp isr_common_stub
isr_exception_16:
      cli
      push byte 0
      push byte 16
      jmp isr_common_stub
isr_exception_17:
      cli
      push byte 0
      push byte 17
      jmp isr_common_stub      
isr_exception_18:
      cli
      push byte 0
      push byte 18
      jmp isr_common_stub      
isr_exception_19:
      cli
      push byte 0
      push byte 19
      jmp isr_common_stub      
isr_exception_20:
      cli
      push byte 0
      push byte 20
      jmp isr_common_stub      
isr_exception_21:
      cli
      push byte 0
      push byte 21
      jmp isr_common_stub      
isr_exception_22:
      cli
      push byte 0
      push byte 22
      jmp isr_common_stub      
isr_exception_23:
      cli
      push byte 0
      push byte 23
      jmp isr_common_stub      
isr_exception_24:
      cli
      push byte 0
      push byte 24
      jmp isr_common_stub      
isr_exception_25:
      cli
      push byte 0
      push byte 25
      jmp isr_common_stub      
isr_exception_26:
      cli
      push byte 0
      push byte 26
      jmp isr_common_stub      
isr_exception_27:
      cli
      push byte 0
      push byte 27
      jmp isr_common_stub      
isr_exception_28:
      cli
      push byte 0
      push byte 28
      jmp isr_common_stub      
isr_exception_29:
      cli
      push byte 0
      push byte 29
      jmp isr_common_stub      
isr_exception_30:
      cli
      push byte 0
      push byte 30
      jmp isr_common_stub      
isr_exception_31:
      cli
      push byte 0
      push byte 31
      jmp isr_common_stub      
            
extern IsrsFaultHandler

isr_common_stub:
    pusha
    push ds
    push es
    push fs
    push gs
    mov ax, 0x10   ; Load the Kernel Data Segment descriptor!
    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax
    mov eax, esp   ; Push us the stack
    push eax
    mov eax, IsrsFaultHandler
    call eax       ; A special call, preserves the 'eip' register
    pop eax
    pop gs
    pop fs
    pop es
    pop ds
    popa
    add esp, 8     ; Cleans up the pushed error code and pushed ISR number
    iret           ; pops 5 things at once: CS, EIP, EFLAGS, SS, and ESP!