Re: [uml-devel] 2.4.22-[67] problems

[Matt Zimmerman <mdz@debian.org>]

On Sun, Dec 21, 2003 at 04:58:44PM +0100, BlaisorBlade wrote:

> Alle 01:47, domenica 21 dicembre 2003, Matt Zimmerman ha scritto:
> > Thanks for looking at it.  It's sounding more and more like the new
> > glibc/linux-kernel-headers packages have broken UML. 
> > Maybe something is
> > getting the host's kernel headers when it needs the ones from the UML build
> > tree?
> Something is getting the host's headers and it must get them, not the ones 
> from UML build tree.
> 
> Every UML arch file with its name ending in _user.c(+ quite a lot of other 
> ones, listed in USER_OBJS in Makefiles) are built against the host headers, 
> since they are the code interacting with the host.

Yes, I understand that.  Was my sentence unclear?  I was suggesting that
it was possible that the host's kernel headers were being used in a
situation where the UML tree kernel headers _should_ be used.

> But you need to actually compile UML against 2.4 host headers to see if this 
> is the reason; debugging it can be worst than an unnoticed wrong pointer or 
> buffer overrun, since probably a macro went in silently and it changed the 
> semantics of sources...

...which is one thing that I have tested.  I substituted 2.4.22 kernel
headers for the 2.6 ones provided by linux-kernel-headers and rebuilt UML,
and the problem persists.

I have heard reports that building the same source on Debian woody (glibc
2.2.5-11.5 with 2.4 kernel headers) works, however.  I am going to be
testing this myself shortly.  If it works, the cause is most likely
somewhere in glibc.

-- 
 - mdz


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