gdt.h File Reference

#include "threads/loader.h"

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Macros
#define	SEL_UCSEG   0x1B
	Segment selectors. More...
#define	SEL_UDSEG   0x23
	User data selector. More...
#define	SEL_TSS   0x28
	Task-state segment. More...
#define	SEL_CNT   6
	Number of segments. More...

Functions
void	gdt_init (void)
	userprog/gdt.h More...

Macro Definition Documentation

SEL_CNT

#define SEL_CNT   6

Number of segments.

Definition at line 11 of file gdt.h.

SEL_TSS

#define SEL_TSS   0x28

Task-state segment.

Definition at line 10 of file gdt.h.

SEL_UCSEG

#define SEL_UCSEG   0x1B

Segment selectors.

More selectors are defined by the loader in loader.h. User code selector.

Definition at line 8 of file gdt.h.

SEL_UDSEG

#define SEL_UDSEG   0x23

User data selector.

Definition at line 9 of file gdt.h.

Function Documentation

gdt_init()

void gdt_init

(

void

)

userprog/gdt.h

userprog/gdt.h

The bootstrap loader's GDT didn't include user-mode selectors or a TSS, but we need both now.

Definition at line 36 of file gdt.c.

References gdt, make_code_desc(), make_data_desc(), make_gdtr_operand(), make_tss_desc(), SEL_KCSEG, SEL_KDSEG, SEL_NULL, SEL_TSS, SEL_UCSEG, SEL_UDSEG, and tss_get().

Referenced by pintos_init().

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