From: Andi Kleen <ak@suse.de>
To: Don Zickus <dzickus@redhat.com>
Cc: fastboot@osdl.org, Horms <horms@verge.net.au>,
Jan Kratochvil <lace@jankratochvil.net>,
"H. Peter Anvin" <hpa@zytor.com>,
Magnus Damm <magnus.damm@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: [CFT] ELF Relocatable x86 and x86_64 bzImages
Date: 09 Aug 2006 01:36:33 +0200 [thread overview]
Message-ID: <p73psfaol4u.fsf@verdi.suse.de> (raw)
In-Reply-To: <20060807235727.GM16231@redhat.com>
Don Zickus <dzickus@redhat.com> writes:
> >
> > Odd. I wonder if I'm missing a serializing instruction somewhere,
> > to ensure the effects of ``self modifying code'' aren't a problem.
> > As I read Intels Documentation if you have a jump before you get
> > to the code there shouldn't be a problem.
> >
> > Still that doesn't really explain bytes_out.
> >
Sounds nasty.
>
> So I narrowed down the problem but it isn't obvious to me why this problem
> exists. Basically, even though bytes_out is supposed to be initialized to
> 0, it becomes -1 before entering decompress_kernel(). Of course, the
> fallout is in flush_window() bytes_out wounds up being one less than
> outcnt and hence my original problem.
>
> Any thoughts on how to debug where this could be getting corrupted?
Use a simulator (hopefully you can reproduce it in there) like qemu
or AMD SimNow and set a watch point on the address?
Or try to find someone who has a Intel target probe to help you out.
-Andi
next prev parent reply other threads:[~2006-08-08 23:36 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <aec7e5c30606300145p441d8d0xd89fab5e87de5a22@mail.gmail.com>
[not found] ` <20060705222448.GC992@in.ibm.com>
[not found] ` <aec7e5c30607051932r49bbcc7eh2c190daa06859dcc@mail.gmail.com>
[not found] ` <20060706081520.GB28225@host0.dyn.jankratochvil.net>
[not found] ` <aec7e5c30607070147g657d2624qa93a145dd4515484@mail.gmail.com>
[not found] ` <20060707133518.GA15810@in.ibm.com>
[not found] ` <20060707143519.GB13097@host0.dyn.jankratochvil.net>
[not found] ` <20060710233219.GF16215@in.ibm.com>
[not found] ` <20060711010815.GB1021@host0.dyn.jankratochvil.net>
[not found] ` <m1d5c92yv4.fsf@ebiederm.dsl.xmission.com>
2006-07-31 16:19 ` [CFT] ELF Relocatable x86 and x86_64 bzImages Eric W. Biederman
2006-07-31 20:25 ` Vivek Goyal
2006-07-31 21:00 ` [Fastboot] " Vivek Goyal
2006-08-01 2:31 ` Eric W. Biederman
2006-08-01 2:34 ` H. Peter Anvin
2006-08-01 3:44 ` Eric W. Biederman
2006-08-01 4:25 ` Jan Kratochvil
2006-08-01 9:09 ` Eric W. Biederman
2006-08-01 9:43 ` Jan Kratochvil
2006-08-01 11:28 ` Eric W. Biederman
2006-08-04 21:08 ` Don Zickus
2006-08-04 21:25 ` Eric W. Biederman
2006-08-04 23:43 ` Don Zickus
2006-08-05 7:49 ` Eric W. Biederman
2006-08-05 16:07 ` Eric W. Biederman
2006-08-07 17:44 ` Don Zickus
2006-08-07 18:08 ` Eric W. Biederman
2006-08-07 23:57 ` Don Zickus
2006-08-08 5:01 ` Eric W. Biederman
2006-08-08 19:36 ` Don Zickus
2006-08-09 20:06 ` Don Zickus
2006-08-10 6:09 ` Eric W. Biederman
2006-08-10 13:13 ` Vivek Goyal
2006-08-10 17:05 ` Eric W. Biederman
2006-08-10 18:18 ` Vivek Goyal
2006-08-10 20:09 ` Eric W. Biederman
2006-08-11 21:25 ` Don Zickus
2006-08-12 7:20 ` Eric W. Biederman
2006-08-12 15:25 ` Don Zickus
2006-08-12 19:41 ` Eric W. Biederman
2006-08-13 20:06 ` Andi Kleen
2006-08-13 21:44 ` Eric W. Biederman
2006-08-14 16:51 ` [Fastboot] " Vivek Goyal
2006-08-14 17:04 ` H. Peter Anvin
2006-08-14 18:11 ` Vivek Goyal
2006-08-14 19:32 ` H. Peter Anvin
2006-08-14 19:42 ` Vivek Goyal
2006-08-14 19:45 ` H. Peter Anvin
2006-08-14 19:57 ` Vivek Goyal
2006-08-14 20:10 ` Eric W. Biederman
2006-08-14 20:59 ` Vivek Goyal
2006-08-14 21:15 ` Eric W. Biederman
2006-08-14 20:00 ` Eric W. Biederman
2006-08-08 23:36 ` Andi Kleen [this message]
2006-08-25 20:16 ` Vivek Goyal
2006-08-25 20:16 ` Vivek Goyal
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