63 lines
1.2 KiB
C
63 lines
1.2 KiB
C
#ifndef GDT_H
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#define GDT_H
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#include <stdint.h>
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extern uint32_t stack_top;
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typedef struct gdt_entry_t Gdt_entry;
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struct gdt_entry_t
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{
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uint16_t limit_low;
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uint16_t base_low;
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uint8_t base_middle;
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uint8_t access;
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uint8_t granularity;
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uint8_t base_high;
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} __attribute__((packed));
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typedef struct gdt_ptr_t Gdt_ptr;
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struct gdt_ptr_t
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{
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uint16_t limit;
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uint32_t base;
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} __attribute__((packed));
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static void gdt_set_gate(uint8_t num, uint32_t base, uint32_t limit, uint8_t access, uint8_t granularity);
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void gdt_install();
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void set_kernel_stack(uint32_t stack);
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typedef struct tss_entry_t Tss_entry;
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struct tss_entry_t
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{
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uint32_t prevTss;
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uint32_t esp0;
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uint32_t ss0;
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uint32_t esp1;
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uint32_t ss1;
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uint32_t esp2;
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uint32_t ss2;
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uint32_t cr3;
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uint32_t eip;
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uint32_t eflags;
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uint32_t eax;
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uint32_t ecx;
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uint32_t edx;
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uint32_t ebx;
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uint32_t esp;
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uint32_t ebp;
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uint32_t esi;
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uint32_t edi;
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uint32_t es;
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uint32_t cs;
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uint32_t ss;
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uint32_t ds;
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uint32_t fs;
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uint32_t gs;
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uint32_t ldt;
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uint16_t trap;
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uint16_t iomap;
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} __attribute__((packed));
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#endif |