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76 lines
1.3 KiB
NASM
76 lines
1.3 KiB
NASM
[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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ISR_NOERRCODE 0
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ISR_NOERRCODE 1
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ISR_NOERRCODE 2
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ISR_NOERRCODE 3
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ISR_NOERRCODE 4
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ISR_NOERRCODE 5
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ISR_NOERRCODE 6
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ISR_NOERRCODE 7
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ISR_NOERRCODE 8
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ISR_NOERRCODE 9
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ISR_NOERRCODE 10
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ISR_NOERRCODE 11
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ISR_NOERRCODE 12
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ISR_NOERRCODE 13
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ISR_NOERRCODE 14
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ISR_NOERRCODE 15
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ISR_NOERRCODE 16
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ISR_NOERRCODE 17
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ISR_NOERRCODE 18
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ISR_NOERRCODE 19
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ISR_NOERRCODE 20
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ISR_NOERRCODE 21
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ISR_NOERRCODE 22
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ISR_NOERRCODE 23
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ISR_NOERRCODE 24
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ISR_NOERRCODE 25
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ISR_NOERRCODE 26
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ISR_NOERRCODE 27
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ISR_NOERRCODE 28
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ISR_NOERRCODE 29
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ISR_NOERRCODE 30
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ISR_NOERRCODE 31
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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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