Re: [uml-devel] [Bug 49277] Compile of usermode-sources-2.6.x fails

[Rob Landley <rob@landley.net>]

On Thursday 10 February 2005 10:44 am, Blaisorblade wrote:

> > And requiring SKAS mode to use uclibc
>
> uclibc doesn't allow static linking? It's strange...

Sorry, meant UML.  (I have a cold.)

> > is roughly equivalent to requiring a
> > kernel module in order to work.
>
> Ok, are you able to figure out a way to copy the whole binary (+ libs) to
> the VM file and remap it from the file to arbitrary address spaces?

Not with this cold and without a lot more study of how UML works, but first I 
want to confirm that you looked at the new 2.6 nonlinear mappings support 
(mm/fremap.c, sys_remap_file_pages() and friends...)

> This is why in TT mode UML is statically linked, it's done so that we must
> not understand where libraries are located and remap them, too. I don't
> think there is a clean way (other than parsing /proc/self/maps, but that is
> a horrible kludge).

Is there a post somewhere describing the problem in more detail?

> > Any idea when SKAS0 might be ready for testing?
>
> You can already test it I guess, but probably it's not for production yet.
>
> I (Wildly) guess a month could be enough, maybe... however for now you can
> do some testing in SKAS mode (the setup inside UML is not different).

So if I build 2.6.11-rc3-bk? I can fire up SKAS0 mode and run it on an 
unmodified kernel?  If so, I'm happy to test this...  (I read Jeff Dike's 
blog entry on SKAS0, but it didn't really have any implementation details.)

Rob


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