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OS/pintos-env/pintos/userprog/gdt.h

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#ifndef USERPROG_GDT_H
#define USERPROG_GDT_H
#include "threads/loader.h"
/* Segment selectors.
More selectors are defined by the loader in loader.h. */
#define SEL_UCSEG 0x1B /* User code selector. */
#define SEL_UDSEG 0x23 /* User data selector. */
#define SEL_TSS 0x28 /* Task-state segment. */
#define SEL_CNT 6 /* Number of segments. */
void gdt_init (void);
#endif /* userprog/gdt.h */