* Info about /dev/kmem required
@ 2001-08-17 13:59 Milind
2001-08-17 21:57 ` Erik Mouw
0 siblings, 1 reply; 5+ messages in thread
From: Milind @ 2001-08-17 13:59 UTC (permalink / raw)
To: linux-kernel; +Cc: blore-linux
Hi all
I wanted some info about ' /dev/kmem ' file with respect to following
1) What this file contains?
2) Who writes into this file?
All I have found is that 'dmesg' will read from this file and display
system information.
Reply at the earliest.
Thanks
Milind
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Info about /dev/kmem required
2001-08-17 13:59 Info about /dev/kmem required Milind
@ 2001-08-17 21:57 ` Erik Mouw
2001-08-20 18:21 ` Frank Neuber
0 siblings, 1 reply; 5+ messages in thread
From: Erik Mouw @ 2001-08-17 21:57 UTC (permalink / raw)
To: Milind; +Cc: linux-kernel, blore-linux
On Fri, Aug 17, 2001 at 07:29:08PM +0530, Milind wrote:
> I wanted some info about ' /dev/kmem ' file with respect to following
>
> 1) What this file contains?
>From Documentation/devices.txt:
1 char Memory devices
1 = /dev/mem Physical memory access
2 = /dev/kmem Kernel virtual memory access
> 2) Who writes into this file?
Normally nobody does, though it can be used to patch up a running
system (in theory).
> Reply at the earliest.
I'm sorry, we're not a helpdesk.
Erik
--
J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department
of Electrical Engineering, Faculty of Information Technology and Systems,
Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands
Phone: +31-15-2783635 Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl
WWW: http://www-ict.its.tudelft.nl/~erik/
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Info about /dev/kmem required
2001-08-17 21:57 ` Erik Mouw
@ 2001-08-20 18:21 ` Frank Neuber
2001-08-21 12:39 ` Erik Mouw
0 siblings, 1 reply; 5+ messages in thread
From: Frank Neuber @ 2001-08-20 18:21 UTC (permalink / raw)
To: Erik Mouw; +Cc: Milind, linux-kernel, blore-linux
On Fri, Aug 17, 2001 at 05:57:39PM -0400, Erik Mouw wrote:
> On Fri, Aug 17, 2001 at 07:29:08PM +0530, Milind wrote:
> > I wanted some info about ' /dev/kmem ' file with respect to following
> >
> > 1) What this file contains?
>
> >From Documentation/devices.txt:
>
> 1 char Memory devices
> 1 = /dev/mem Physical memory access
> 2 = /dev/kmem Kernel virtual memory access
>
> > 2) Who writes into this file?
>
> Normally nobody does, though it can be used to patch up a running
> system (in theory).
>
> > Reply at the earliest.
>
> I'm sorry, we're not a helpdesk.
I think You can use /dev/kmem as an corefile for gdb. So it is possible to debug
the linux kernel (of course read only :-)).
Frank
--
Dipl.-Ing. Elektrotechnik convergence integrated media gmbh / HW
Frank Neuber Rosenthalerstr.51 / 10178 Berlin
Email: neuber@convergence.de Phone: +49(0)30-72 62 06 50
WWW: www.convergence.de Fax: +49(0)30-72 62 06 55
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Info about /dev/kmem required
2001-08-21 12:39 ` Erik Mouw
@ 2001-08-21 12:35 ` Frank Neuber
0 siblings, 0 replies; 5+ messages in thread
From: Frank Neuber @ 2001-08-21 12:35 UTC (permalink / raw)
To: Erik Mouw; +Cc: Milind, linux-kernel
On Tue, Aug 21, 2001 at 02:39:54PM +0200, Erik Mouw wrote:
> On Mon, Aug 20, 2001 at 08:21:08PM +0200, Frank Neuber wrote:
> > I think You can use /dev/kmem as an corefile for gdb. So it is
> > possible to debug the linux kernel (of course read only :-)).
>
> No, that's what /proc/kcore is for.
You are right!! Sorry it was my mistake.
Frank
--
Dipl.-Ing. Elektrotechnik convergence integrated media gmbh / HW
Frank Neuber Rosenthalerstr.51 / 10178 Berlin
Email: neuber@convergence.de Phone: +49(0)30-72 62 06 50
WWW: www.convergence.de Fax: +49(0)30-72 62 06 55
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Info about /dev/kmem required
2001-08-20 18:21 ` Frank Neuber
@ 2001-08-21 12:39 ` Erik Mouw
2001-08-21 12:35 ` Frank Neuber
0 siblings, 1 reply; 5+ messages in thread
From: Erik Mouw @ 2001-08-21 12:39 UTC (permalink / raw)
To: Frank Neuber; +Cc: Milind, linux-kernel, blore-linux
On Mon, Aug 20, 2001 at 08:21:08PM +0200, Frank Neuber wrote:
> I think You can use /dev/kmem as an corefile for gdb. So it is
> possible to debug the linux kernel (of course read only :-)).
No, that's what /proc/kcore is for.
Erik
--
J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department
of Electrical Engineering, Faculty of Information Technology and Systems,
Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands
Phone: +31-15-2783635 Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl
WWW: http://www-ict.its.tudelft.nl/~erik/
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2001-08-21 12:51 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2001-08-17 13:59 Info about /dev/kmem required Milind
2001-08-17 21:57 ` Erik Mouw
2001-08-20 18:21 ` Frank Neuber
2001-08-21 12:39 ` Erik Mouw
2001-08-21 12:35 ` Frank Neuber
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