gdt.h File Reference

#include <stdint.h>

Go to the source code of this file.

Data Structures
struct	gdt
struct	gdt_structured
struct	gdt_descriptor

Macros
#define	TOTAL_GDT_SEGMENTS   6
#define	KERNEL_CODE_SELECTOR   0x08
#define	KERNEL_DATA_SELECTOR   0x10
#define	USER_CODE_SELECTOR   0x1b
#define	USER_DATA_SELECTOR   0x23

Functions
struct gdt	__attribute__ ((packed))
void	gdt_load (struct gdt *gdt, unsigned int size)
void	gdt_read (struct gdt_descriptor *target)
void	gdt_structured_to_gdt (struct gdt *gdt, struct gdt_structured *structured_gdt, unsigned int total_entries)

Variables
uint16_t	segment
uint16_t	base_first
uint8_t	base
uint8_t	access
uint8_t	high_flags
uint8_t	base_24_31_bits
struct gdt_structured	__attribute__
uint16_t	size
uint32_t	start_address

Macro Definition Documentation

KERNEL_CODE_SELECTOR

#define KERNEL_CODE_SELECTOR   0x08

KERNEL_DATA_SELECTOR

#define KERNEL_DATA_SELECTOR   0x10

TOTAL_GDT_SEGMENTS

#define TOTAL_GDT_SEGMENTS   6

USER_CODE_SELECTOR

#define USER_CODE_SELECTOR   0x1b

USER_DATA_SELECTOR

#define USER_DATA_SELECTOR   0x23

Function Documentation

__attribute__()

struct gdt __attribute__

(

(packed)

)

gdt_load()

void gdt_load	(	struct gdt *	gdt,
		unsigned int	size
	)

References gdt_descriptor, size, gdt_descriptor::size, and gdt_descriptor::start_address.

gdt_read()

void gdt_read

(

struct gdt_descriptor *

target

)

gdt_structured_to_gdt()

void gdt_structured_to_gdt	(	struct gdt *	gdt,
		struct gdt_structured *	structured_gdt,
		unsigned int	total_entries
	)

References encode_gdt_entry().

Variable Documentation

__attribute__

struct gdt_structured __attribute__

access

uint8_t access

base

uint8_t base

base_24_31_bits

uint8_t base_24_31_bits

base_first

uint16_t base_first

high_flags

uint8_t high_flags

segment

uint16_t segment

size

uint16_t size

start_address

uint32_t start_address