27 lines
698 B
C
27 lines
698 B
C
#ifndef X86_64_INTERRUPT_H
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#define X86_64_INTERRUPT_H 1
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#include <types.h>
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typedef struct __gate_descriptor_t
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{
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u16 offset_01;
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u16 segment_selector; // for code segment
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u16 flags;
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u16 offset_23;
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u32 offset_4567;
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u32 reserved;
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} gate_descriptor_t;
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// interrupt stack table，每个表项都指向tss
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// 需要加载寄存器IA32_INTERRUPT_SSP_TABLE
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#define INTERRUPT_DESCRIPTOR_FLAG_IST(ssp) (ssp)
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// 在第15位上有一个表示代码段是否存在的标志位，代码段总是存在，故直接设置为1
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#define INTERRUPT_DESCRIPTOR_FLAG_TYPE_INTERRUPT (0x8e << 8)
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#define INTERRUPT_DESCRIPTOR_FLAG_TYPE_TRAP (0x8f << 8)
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extern gate_descriptor_t idt[256];
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#endif
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