bits 32

; !!!  ISRs  !!!
global _i86_isr0
global _i86_isr1
global _i86_isr2
global _i86_isr3
global _i86_isr4
global _i86_isr5
global _i86_isr6
global _i86_isr7
global _i86_isr8
global _i86_isr9
global _i86_isr10
global _i86_isr11
global _i86_isr12
global _i86_isr13
global _i86_isr14
global _i86_isr15
global _i86_isr16
global _i86_isr17
global _i86_isr18
global _i86_isr19
global _i86_isr20
global _i86_isr21
global _i86_isr22
global _i86_isr23
global _i86_isr24
global _i86_isr25
global _i86_isr26
global _i86_isr27
global _i86_isr28
global _i86_isr29
global _i86_isr30
global _i86_isr31

_i86_isr0:
      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
_i86_isr1:
      cli
      push byte 0
      push byte 1
      jmp isr_common_stub
_i86_isr2:
      cli
      push byte 0
      push byte 2
      jmp isr_common_stub
_i86_isr3:
      cli
      push byte 0
      push byte 3
      jmp isr_common_stub
_i86_isr4:
      cli
      push byte 0
      push byte 4
      jmp isr_common_stub
_i86_isr5:
      cli
      push byte 0
      push byte 5
      jmp isr_common_stub
_i86_isr6:
      cli
      push byte 0
      push byte 6
      jmp isr_common_stub
_i86_isr7:
      cli
      push byte 0
      push byte 7
      jmp isr_common_stub
_i86_isr8:
      cli
      push byte 8
      jmp isr_common_stub
_i86_isr9:
      cli
      push byte 0
      push byte 9
      jmp isr_common_stub      
_i86_isr10:
      cli
      push byte 10
      jmp isr_common_stub
_i86_isr11:
      cli
      push byte 11
      jmp isr_common_stub
_i86_isr12:
      cli
      push byte 12
      jmp isr_common_stub
_i86_isr13:
      cli
      push byte 13
      jmp isr_common_stub
_i86_isr14:
      cli
      push byte 14
      jmp isr_common_stub
_i86_isr15:
      cli
      push byte 0
      push byte 15
      jmp isr_common_stub
_i86_isr16:
      cli
      push byte 0
      push byte 16
      jmp isr_common_stub
_i86_isr17:
      cli
      push byte 0
      push byte 17
      jmp isr_common_stub      
_i86_isr18:
      cli
      push byte 0
      push byte 18
      jmp isr_common_stub      
_i86_isr19:
      cli
      push byte 0
      push byte 19
      jmp isr_common_stub      
_i86_isr20:
      cli
      push byte 0
      push byte 20
      jmp isr_common_stub      
_i86_isr21:
      cli
      push byte 0
      push byte 21
      jmp isr_common_stub      
_i86_isr22:
      cli
      push byte 0
      push byte 22
      jmp isr_common_stub      
_i86_isr23:
      cli
      push byte 0
      push byte 23
      jmp isr_common_stub      
_i86_isr24:
      cli
      push byte 0
      push byte 24
      jmp isr_common_stub      
_i86_isr25:
      cli
      push byte 0
      push byte 25
      jmp isr_common_stub      
_i86_isr26:
      cli
      push byte 0
      push byte 26
      jmp isr_common_stub      
_i86_isr27:
      cli
      push byte 0
      push byte 27
      jmp isr_common_stub      
_i86_isr28:
      cli
      push byte 0
      push byte 28
      jmp isr_common_stub      
_i86_isr29:
      cli
      push byte 0
      push byte 29
      jmp isr_common_stub      
_i86_isr30:
      cli
      push byte 0
      push byte 30
      jmp isr_common_stub      
_i86_isr31:
      cli
      push byte 0
      push byte 31
      jmp isr_common_stub      
            
extern _i86_fault_handler

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, _i86_fault_handler
    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!