From mboxrd@z Thu Jan  1 00:00:00 1970
From: jiangtao.jit@gmail.com (jiangtao.jit)
Date: Thu, 11 Aug 2011 19:18:54 +0800
Subject: What's the value of %cs before jump in pm32 on booting?
Message-ID: <201108111918521090677@gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

Hi all:

on booting of x86
top of file arch/x86/boot/pmjump.S
there is code
-------------------
GLOBAL(protected_mode_jump)
	movl	%edx, %esi
	xorl	%ebx, %ebx
	movw	%cs, %bx
	shll	$4, %ebx
	addl	%ebx, 2f
...
-------------------

what's the value of %cs here? how was it loaded?
i would really appreciate if someone provide me some references
thank you very much


2011-08-11 
jiangtao.jit