user-mode-linux-user

[uml-user] segmentation fault

[David C. <ma...@da...>]

Hi

I'm trying to get going with UML on a Fedora Core 1 system.  Since Fedora is a 
RH derivative, the 2.4.19 RPM is no use due to the kernel panic on startup.  
Hence I bit the bullet, downloaded the Linux 2.4.22 vanilla kernel and 
patched it with uml-patch-2.4.22-6.  I used the default options for 
compilation and it compiled just fine, as I followed the instructions on the 
compiling page.

However, when I run linux, it segfaulted:

Checking for the skas3 patch in the host...not found
Checking for /proc/mm...not found
Segmentation fault

I saw the entry in the FAQ about the 2G/2G split which seems the only 
reference to an immediate segfault, and since I had no idea how my machine 
was configured in that respect, I tried that enabling CONFIG_HOST_2G_2G on a 
clean make, but still to no avail.

I've attached the strace.

Any ideas?  As you'll appreciate from the above, I'm something of a newbie and 
so I'm sorry if I'm failing to do something simple.

Many thanks

David

[uml-user] segmentation fault

[mattias <mj...@mj...>]

i compile um on centos 5.7 and try
./linux
but the only thing are
segmentation fault

Re: [uml-user] segmentation fault

[Lakshmipathi.G <lak...@gm...>]

Hi -
If I'm not wrong , you should provide rootfs  as an argument -
./linux ubda=/path/to/rootfs

If that didn't work,please post the exact compilation steps and exact error
messages.


-- 
----
Cheers,
Lakshmipathi.G
FOSS Programmer.
www.giis.co.in

On Wed, Nov 16, 2011 at 8:42 PM, mattias <mj...@mj...> wrote:

> **
> i compile um on centos 5.7 and try
> ./linux
> but the only thing are
>
> segmentation fault
>
>
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Re: [uml-user] segmentation fault

[M A Y. <m.a...@du...>]

On Sun, 16 Nov 2003, David Cornish wrote:

> I'm trying to get going with UML on a Fedora Core 1 system.  Since Fedora is a
> RH derivative, the 2.4.19 RPM is no use due to the kernel panic on startup.
> Hence I bit the bullet, downloaded the Linux 2.4.22 vanilla kernel and
> patched it with uml-patch-2.4.22-6.  I used the default options for
> compilation and it compiled just fine, as I followed the instructions on the
> compiling page.
>
> However, when I run linux, it segfaulted:
>
> Checking for the skas3 patch in the host...not found
> Checking for /proc/mm...not found
> Segmentation fault

Try echo "0" >/proc/sys/kernel/exec-shield-randomize
as root first. See also http://toast.debian.net/~may/umlproject/
where my playing with uml on fedora is documented.

	Michael Young

Re: [uml-user] segmentation fault

[David C. <ma...@da...>]

> Try echo "0" >/proc/sys/kernel/exec-shield-randomize
> as root first.

Many thanks - that worked a treat

> See also http://toast.debian.net/~may/umlproject/
> where my playing with uml on fedora is documented.

Thanks - a useful page.  I'm only sorry that I don't have more time to be of 
assistance in your project.  Keep up the good work!

David