Hi Baoquan:
Thank you for your answer.
That is to say the designer use __USER_DS here deliberately to improve the
efficiency jump from kernel space to user space?
BTW,how can you find this email? I write this email On 10/24/2012.
2013/6/20 Baoquan He
> On 10/24/2012 08:04 PM, Fan Yang wrote:
>
On Tue, 30 Oct 2012, Fan Yang wrote:
> 2012/10/29 Mulyadi Santosa
>
> > Hi Fan...
> >
> > On Sun, Oct 28, 2012 at 9:02 PM, Fan Yang wrote:
> > >
> > > [root@shell--box kernel_mod]# dmesg -c
> > > **
> > > cs 60 96
> > > ds 7b 123
> > > ss 68 104
> > > es 7b 123
>
On Tue, Oct 30, 2012 at 7:44 AM, Fan Yang wrote:
> Hi Mulyadi Santosa
>I get the same result during the kernel module init and exit. Then I try
> to add a syscall to print these registers, and nothing changed. It is
> strange.
I think you need to observe deeper, something change this.
BTW,
2012/10/29 Mulyadi Santosa
> Hi Fan...
>
> On Sun, Oct 28, 2012 at 9:02 PM, Fan Yang wrote:
> >
> > [root@shell--box kernel_mod]# dmesg -c
> > **
> > cs 60 96
> > ds 7b 123
> > ss 68 104
> > es 7b 123
> > fs d8 216
> > gs e0 224
> > ***
Hi Fan...
On Sun, Oct 28, 2012 at 9:02 PM, Fan Yang wrote:
>
> [root@shell--box kernel_mod]# dmesg -c
> **
> cs 60 96
> ds 7b 123
> ss 68 104
> es 7b 123
> fs d8 216
> gs e0 224
> **
>
> The cs and ds in the kernel space is 60 and 7b
2012/10/28 Fan Yang
>
>
> 2012/10/27 Jun Hu
>
>> Can you post out your codes ?
>>
>> *From:* Fan Yang
>> *Sent:* Wednesday, October 24, 2012 8:04 PM
>> *To:* kernelnewbies@kernelnewbies.org
>> *Subject:* linux segment
>>
>> Hi all
2012/10/27 Jun Hu
> Can you post out your codes ?
>
> *From:* Fan Yang
> *Sent:* Wednesday, October 24, 2012 8:04 PM
> *To:* kernelnewbies@kernelnewbies.org
> *Subject:* linux segment
>
> Hi all:
> I print the cs ds and ss register in the user space, and it is
Can you post out your codes ?
From: Fan Yang
Sent: Wednesday, October 24, 2012 8:04 PM
To: kernelnewbies@kernelnewbies.org
Subject: linux segment
Hi all:
I print the cs ds and ss register in the user space, and it is same as the
__USER_CS and __USER_DS which defined in kernel as 73 and
On Wed, Oct 24, 2012 at 7:04 PM, Fan Yang wrote:
> Hi all:
> I print the cs ds and ss register in the user space, and it is same as
> the __USER_CS and __USER_DS which defined in kernel as 73 and 7b. In the
> kernel __KERNEL_CS and __KERNEL_DS defined as 60 and 68, but when I print
> this two
Hi all:
I print the cs ds and ss register in the user space, and it is same as
the __USER_CS and __USER_DS which defined in kernel as 73 and 7b. In the
kernel __KERNEL_CS and __KERNEL_DS defined as 60 and 68, but when I print
this two value in my kernel module, I get 60 and 7b. Why ? It should
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