26 lines
573 B
ArmAsm
26 lines
573 B
ArmAsm
format elf64
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extrn io_WriteConsoleASCII
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public interrupt_MapHandler
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section '.text' executable
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; sysvx64call void interrupt_MapHandler(uint64_t handler, int interrupt)
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;
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; Input: (uint64_t rdi, int rsi)
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; Clobbers: rax, flags
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interrupt_MapHandler:
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mov rax, 0xFFFFFFFEC0000000 ; KERNEL_IDT_MAPPING
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shl rsi, 4 ; rsi *= 16
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add rsi, rax ; rsi += KERNEL_IDT_MAPPING
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mov [rsi], di
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mov word [rsi+2], 0x08 ; GDT_EXEC_SELECTOR (index=1)
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mov word [rsi+4], 0x8e00
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shr rdi, 16
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mov [rsi+6], di
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shr rdi, 16
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mov [rsi+8], rdi
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ret
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