gdt.h

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#ifndef _GDT_H_
#define _GDT_H_

#define GDT_ENTRY_COUNT 6

void GDT_Initialize();

typedef volatile struct strtss
{
    unsigned short   link;
    unsigned short   link_h;
    unsigned long   esp0;
    unsigned short   ss0;
    unsigned short   ss0_h;
    unsigned long   esp1;
    unsigned short   ss1;
    unsigned short   ss1_h;
    unsigned long   esp2;
    unsigned short   ss2;
    unsigned short   ss2_h;
    unsigned long   cr3;
    unsigned long   eip;
    unsigned long   eflags;
    unsigned long   eax;
    unsigned long   ecx;
    unsigned long   edx;
    unsigned long    ebx;
    unsigned long   esp;
    unsigned long   ebp;
    unsigned long   esi;
    unsigned long   edi;
    unsigned short   es;
    unsigned short   es_h;
    unsigned short   cs;
    unsigned short   cs_h;
    unsigned short   ss;
    unsigned short   ss_h;
    unsigned short   ds;
    unsigned short   ds_h;
    unsigned short   fs;
    unsigned short   fs_h;
    unsigned short   gs;
    unsigned short   gs_h;
    unsigned short   ldt;
    unsigned short   ldt_h;
    unsigned short   trap;
    unsigned short   iomap;
} __attribute__((packed)) tss_struct;

tss_struct sys_tss; //Define the TSS as a global structure

#endif /* end of include guard: _GDT_H_ */