From: ebiederm@xmission.com (Eric W. Biederman)
To: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>,
Maxim Levitsky <maximlevitsky@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: [BUG] i386 relocable kernel breakes /proc/kcore debugging
Date: Mon, 30 Jul 2007 08:23:11 -0600 [thread overview]
Message-ID: <m11weqvuls.fsf@ebiederm.dsl.xmission.com> (raw)
In-Reply-To: <20070730084116.GA18263@host0.dyn.jankratochvil.net> (Jan Kratochvil's message of "Mon, 30 Jul 2007 10:41:16 +0200")
Jan Kratochvil <jan.kratochvil@redhat.com> writes:
> On Mon, 30 Jul 2007 10:03:03 +0200, Vivek Goyal wrote:
>> On Sat, Jul 28, 2007 at 04:43:43AM +0300, Maxim Levitsky wrote:
> ...
>> > gdb 'thinks' that all kernel symbols are below 0x80000000 , while they are
> at
>> > 0xC000....
>> >
>> > Turning CONFIG_RELOCATABLE off fixes that, so I assume that is the reason
> for
>> > that.
>>
>> This is a gdb issue. I had raised it in gdb mailing list some time back.
>>
>> http://sourceware.org/ml/gdb/2006-08/msg00137.html
>
> There was the patch post:
> http://sources.redhat.com/ml/gdb/2006-08/msg00182.html
>
>> What version of gdb you are using? I know it got fixed for gdb shipped
>> with RHEL5. I am not sure about what upstream version of gdb it got fixed
>> in.
>
> It did not make it to the upstream as the patch above is an imperfect one.
> It is fixed in RH gdb-6.5-5 upwards, therefore Fedora 6 + RHEL-5.
> http://cvs.fedora.redhat.com/viewcvs/*checkout*/devel/gdb/gdb-6.5-bz203661-emit-relocs.patch?root=core
Has anyone looked at the filtering by ignoring SHTSYM_TAB? The other
approach suggested? The patch above only works for ET_EXEC because
we can safely ignore everything.
Eric
prev parent reply other threads:[~2007-07-30 14:26 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200707280443.44048.maximlevitsky@gmail.com>
2007-07-28 1:58 ` [BUG] i386 relocable kernel breakes /proc/kcore debugging Eric W. Biederman
2007-07-28 1:58 ` Eric W. Biederman
2007-07-30 8:03 ` Vivek Goyal
2007-07-30 8:41 ` Jan Kratochvil
2007-07-30 9:32 ` Maxim Levitsky
2007-07-30 14:23 ` Eric W. Biederman [this message]
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