linux-kernel - Question: use of FS, GS segment registers in Linux

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Message-ID: <CACmZjJK4Ui7oMikTLWwTQ+pHWJoeODdp2jskQLDxHJ4uPaDYMg@mail.gmail.com>
Date:	Tue, 12 May 2015 10:00:17 +0800
From:	Pengfei Yuan <0xcoolypf@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Subject: Question: use of FS, GS segment registers in Linux

Hi,

What is the use of FS, GS segment registers in kernel and user mode,
on x86 and x86-64?
Where can I find the related kernel (definition/setup) code?

I have read the code in arch/x86/include/asm/segment.h, but still a
little confused.

Regards,

Yuan, Pengfei
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