Re: [uml-user] Usage of UML (User Mode Linux)

[Ralph <ra...@de...>]

Am Freitag 17 September 2004 18:58 schrieb Lei Yang:
> Dear fellows,
>
> I am new to kernel modules and am trying to get a module work right now. I
> need some tools to debug. In order not to risk the host machine, I am
> thinking of using UML. I downloaded the kernel RPM
>
> ------user_mode_linux-2.4.19.5um-0.i386.rpm
>
> and root filesystem
>
> ------Debian-3.0r0.ext2.bz2
>
> and got Debian boot sucessfully. However, I still have several questions:
>
> 1. The kernel version does not match filesystem:
> (none):/lib/modules# ls
> 2.4.18-37um
> (none):/lib/modules# uname -r
> 2.4.19-5um

You have to copy /usr/lib/uml/modules/... (from the host) to /lib/modules (on 
the guest) to have the correct modules for the installed uml kernel.

> 2. How do I get my own module compiled into the kernel and debug with it?

apt-get install kernel-source-2.4.19
apt-get source user-mode-linux
cd user-mode-linux
debian/rules unpack
debian/rules patch
debian/rules configure
cd kernel-source-2.4.19
make menuconfig
<edit the config>
cp .config ../config
cd..
dpkg-buildpackage -b

this will built your own user-mode-linux debian package with the config of 
your choice.

I hope the commands are 100% correct, but I am not sure, because I never used 
the quite old woody version myself.

> I've been reading the UML homepage
> http://user-mode-linux.sourceforge.net/index.html
>
> but have not really found tips helpful to me. Could anyone give me any hint
> how to do this, or where to look at?
>
> TIA!
>
> Lei

--Ralph

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