Re: [uml-devel] Re: [uml-user] SuSE 9.1 host + 2.4.26 Kernel + GCC 3.3.3 similarities to 2.6.6!? (2.6.7 additionally!)

[uml <uml@dot1q.net>]

O-k, I just ran the sam test on the 2.6.7 kernel with the same issues

The addition of -fno-unit-at-a-time to the -O2 switch seemed to resolve the
issues for it as well.

Here is a nm diff if you'd like it:
https://p0lar.dot1q.net/changes-2.6.7-broken-working.bz2


----- Original Message ----- 
From: "uml" <uml@dot1q.net>
To: "uml-user" <user-mode-linux-user@lists.sourceforge.net>;
<user-mode-linux-devel@lists.sourceforge.net>
Cc: "roland" <for_spam@gmx.de>
Sent: Thursday, June 17, 2004 4.00 PM
Subject: Re: [uml-devel] Re: [uml-user] SuSE 9.1 host + 2.4.26 Kernel + GCC
3.3.3 similarities to 2.6.6!?


OOps.. can't 'strip linux' before using nm... heh

It was 786K so I compressed it to 168K and it's available at
https://p0lar.dot1q.net/theChanges.bz2

I compiled both cleanly with the only change I made from the default config
was turning on module support for both.

Here's a quick transcript of the procedure:

cd /tmp
rm -rf /tmp/linux-2.6.6
tar -jxvf linux-2.6.6.tar.bz2
cd linux-2.6.6
bzcat ../uml-patch-2.6.6-1.bz2 | patch -p1
make menuconfig ARCH=um
perl -e 's/-O2/-O2 -fno-unit-at-a-time/' -p -i.bak Makefile arch/um/Makefile
make linux modules ARCH=um
cp linux ../uml/linux-2.6.6-working
cd /tmp
rm -rf /tmp/linux-2.6.6
tar -jxvf linux-2.6.6.tar.bz2
cd linux-2.6.6
bzcat ../uml-patch-2.6.6-1.bz2 | patch -p1
make menuconfig ARCH=um
make linux modules ARCH=um
cp linux ../uml/linux-2.6.6-broken
cd /tmp/uml
nm linux-2.6.6-broken > broken.list
nm linux-2.6.6-working > working.list
diff -u broken.list working.list > theChanges
bzip2 theChanges

Let me know if you need anything else!

----- Original Message ----- 
From: "BlaisorBlade" <blaisorblade_spam@yahoo.it>
To: "uml" <uml@dot1q.net>; "uml-user"
<user-mode-linux-user@lists.sourceforge.net>;
<user-mode-linux-devel@lists.sourceforge.net>
Cc: "roland" <for_spam@gmx.de>
Sent: Thursday, June 17, 2004 2.46 PM
Subject: Re: [uml-devel] Re: [uml-user] SuSE 9.1 host + 2.4.26 Kernel + GCC
3.3.3 similarities to 2.6.6!?


Alle 20:10, giovedì 17 giugno 2004, hai scritto:
> Ah, I only tried adding the -fno-unit-at-a-time switch to -O2.. it seemed
> to work quite cleanly, and as well as expected by simply replacing the -O2
> with -O1 as I was previously doing.

Wow! Now we know what to do... thanks a lot!

> I'm really unsure about the attribute_used declaration, but if you can
tell
> me how or what to test, I'm more than willing to give it a few dozen
> recompiles.

Well, thanks a lot for your effort and availability... but the
attribute_used
thing will be a series of little code changes, adding attribute_used to a
lot
of "static" simbols which gcc is somehow deleting. However, I cannot test
anything since I haven't the buggy gcc. Since you have, take a broken binary
and a working one (the only difference must be the -fno-unit-at-a-time
switch
in the right places) and run:

nm broken > list1
nm working > list2
diff -u list1 list2 > theChanges

and send me "theChanges" (I don't need nor want list1 or list2 for now, they
are too big maybe for a 56k modem to download). With that at hand, it will
take probably ten minutes for the fix.

Bye
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729




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Learn from the experts at JavaOne(SM), Sun's Worldwide Java Developer
Conference, June 28 - July 1 at the Moscone Center in San Francisco, CA
REGISTER AND SAVE! http://java.sun.com/javaone/sf Priority Code NWMGYKND
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