# X64 - Global Desriptor Table (GDT)

[TOC]

## References

### [Arch2001 04 SegmentationAndPrivilege 03 GDT&LDT 01](https://youtu.be/9pEDSX240zI)

{%youtube 9pEDSX240zI %}

### [Arch2001 04 SegmentationAndPrivilege 03 GDT&LDT 02](https://youtu.be/n0gaQKPZzrg)

{%youtube n0gaQKPZzrg %}

### [Arch2001 04 SegmentationAndPrivilege 03 GDT&LDT 05](https://youtu.be/-SqHRTKu_Bw)

{%youtube -SqHRTKu_Bw %}

## In Linux

### [arch/x86/kernel/idt.c](https://elixir.bootlin.com/linux/latest/source/arch/x86/kernel/idt.c#L20)

Albeit an excerpt from IDT-related source code, this file contains macro defin

#define G(_vector, _addr, _ist, _type, _dpl, _segment)	\
	{						\
		.vector		= _vector,		\
		.bits.ist	= _ist,			\
		.bits.type	= _type,		\
		.bits.dpl	= _dpl,			\
		.bits.p		= 1,			\
		.addr		= _addr,		\
		.segment	= _segment,		\
	}