41 lines
753 B
NASM
41 lines
753 B
NASM
[bits 32]
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global idt_load
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global common_isr_stub
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extern isr_handler
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extern _push_regs
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extern _pop_regs
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idt_load:
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mov eax, [esp + 4]
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lidt [eax]
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ret
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common_isr_stub:
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call _push_regs ; Push all general-purpose registers
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push ds
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push es
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push fs
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push gs
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mov ax, 0x10 ; Load kernel data segment
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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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push esp ; Pass pointer to the register state
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call isr_handler ; Call your C ISR handler
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add esp, 4 ; Clean up stack from push esp
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pop gs
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pop fs
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pop es
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pop ds
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call _pop_regs ; restore all general-purpose registers
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add esp, 8 ; Remove int_no and err_code
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sti
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iret
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