gdt.c File Reference

#include <idt/idtirq.h>

Go to the source code of this file.

Functions
void	GdtSetGate (int num, u32 base, u32 limit, u8 access, u8 gran)
	Set a GDT entry (descriptor)
void	GdtInstall ()
	Initialize and load the Global Descriptor Table (GDT)

Variables
struct GdtEntry	gdt [3]
struct GdtPtr	gp

Function Documentation

GdtInstall()

void GdtInstall

(

)

Initialize and load the Global Descriptor Table (GDT)

• Sets up three GDT entries:
  • Null segment
  • Code segment (executable, readable)
  • Data segment (read/write)
• Loads the GDT register with the new table

Definition at line 56 of file gdt.c.

GdtSetGate()

void GdtSetGate	(	int	num,
		u32	base,
		u32	limit,
		u8	access,
		u8	gran )

Set a GDT entry (descriptor)

Parameters

num	Index of the GDT entry to set
base	Base address for the segment
limit	Limit of the segment
access	Access flags (e.g., executable, readable)
gran	Granularity and size flags

Definition at line 35 of file gdt.c.

Variable Documentation

gdt

struct GdtEntry gdt[3]

Global Descriptor Table entries

Definition at line 21 of file gdt.c.

gp

struct GdtPtr gp

GDT pointer structure

Definition at line 24 of file gdt.c.