[uml-devel] Re: Problems with UML on Debian Sarge 64 host

[Ian McDonald <imcdnzl@gmail.com>]

Forgot to say that I have tested with 2.6.11.4 and -bs3, also
2.6.12-rc2. Also attempted 2.6.12-rc2 with development patch but this
won't compile at present as per earlier message.

On 14/04/05, Ian McDonald <imcdnzl@gmail.com> wrote:
> Hi there,
> 
> In my continuing saga (which some are becoming familiar with) to get
> UML 2.6.x working at all I have been given access to another machine
> to develop on and my old machine is going to disappear.
> 
> This machine is Debian Sarge with gcc 3.3.5 on an AMD64 with 32 bit
> userspace although 64 bit compiles can also occur.
> 
> I am doing all my UML builds with ARCH=um SUBARCH=i386 at this point in time.
> 
> The problem is that my bootup dies very early on and this is the total output:
> Checking for /proc/mm...not found
> Checking PROT_EXEC mmap in /tmp...OK
> tracing thread pid = 20981
> OP_FORK failed to attach pid
> 
> I suspect that this is something to do with my mixed 32/64 bit
> environment but I am not sure... Can anybody shed some light on this?
> 
> BTW I have also written a patch which I think is worth submitting into
> the kernel tree as it gives better debugging of error messages in
> arch/um/kernel/tt/tracer.c for where my process is dying.
> 
> When I run with my patch it shows that it is dying on the
> PTRACE_ATTACH with an error EPERM but I can run other processes etc
> like gdb which attach to processes.
> 
> Any help would be greatly appreciated.
> 
> Ian
> 
> 
>


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