2017-11-01 02:07:03 -04:00
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[EXTERN isr]
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%macro ISR_NOERRCODE 1
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[GLOBAL isr%1]
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isr%1:
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cli
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push byte 0
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push byte %1
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jmp isr_common_stub
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%endmacro
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%macro ISR_ERRCODE 1
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[GLOBAL isr%1]
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isr%1:
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cli
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push byte %1
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jmp isr_common_stub
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%endmacro
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2017-11-02 06:50:47 -04:00
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ISR_NOERRCODE 0 ; #DE - Divide Error Exception
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ISR_NOERRCODE 1 ; #DB - Debug Exception
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ISR_NOERRCODE 2 ; NMI - Non-maskable interrupt
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ISR_NOERRCODE 3 ; #BP - Breakpoint Exception
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ISR_NOERRCODE 4 ; #OF - Overflow Exception
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ISR_NOERRCODE 5 ; #BR - BOUND Range Exceeded Exception
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ISR_NOERRCODE 6 ; #UD - Invalid Opcode Exception
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ISR_NOERRCODE 7 ; #NM - Device Not Available Exception
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ISR_ERRCODE 8 ; #DF - Double Fault Exception
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ISR_NOERRCODE 9 ; Reserved - Coprocessor Segment Overrun
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ISR_ERRCODE 10 ; #TS - Invalid TSS Exception
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ISR_ERRCODE 11 ; #NP - Segment Not Present
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ISR_ERRCODE 12 ; #SS - Stack Fault Exception
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ISR_ERRCODE 13 ; #GP - General Protection Exception
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ISR_ERRCODE 14 ; #PF - Page-Fault Exception
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ISR_NOERRCODE 15 ; Reserved
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ISR_NOERRCODE 16 ; #MF - x87 FPU Floating-Point Error
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ISR_ERRCODE 17 ; #AC - Alignment Check Exception
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ISR_NOERRCODE 18 ; #MC - Machine-Check Exception
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ISR_NOERRCODE 19 ; #XF - SIMD Floating-Point Exception
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ISR_NOERRCODE 20 ; Reserved
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ISR_NOERRCODE 21 ; Reserved
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ISR_NOERRCODE 22 ; Reserved
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ISR_NOERRCODE 23 ; Reserved
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ISR_NOERRCODE 24 ; Reserved
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ISR_NOERRCODE 25 ; Reserved
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ISR_NOERRCODE 26 ; Reserved
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ISR_NOERRCODE 27 ; Reserved
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ISR_NOERRCODE 28 ; Reserved
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ISR_NOERRCODE 29 ; Reserved
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ISR_NOERRCODE 30 ; Reserved
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ISR_NOERRCODE 31 ; Reserved
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2017-11-01 02:07:03 -04:00
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isr_common_stub:
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pusha ; Pushes edi,esi,ebp,esp,ebx,edx,ecx,eax
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mov ax, ds ; Lower 16-bits of eax = ds.
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push eax ; save the data segment descriptor
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mov ax, 0x10 ; load the kernel data segment descriptor
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax
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call isr
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pop eax ; reload the original data segment descriptor
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax
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popa ; Pops edi,esi,ebp...
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add esp, 8 ; Cleans up the pushed error code and pushed ISR number
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sti
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iret ; pops 5 things at once: CS, EIP, EFLAGS, SS, and ESP
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