From: Derek Atkins <warlord@MIT.EDU>
To: Dave Anderson <anderson@redhat.com>
Cc: kgdb-bugreport@lists.sourceforge.net, vgoyal@in.ibm.com,
Kexec Mailing List <kexec@lists.infradead.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Jason Wessel <jason.wessel@windriver.com>
Subject: Re: [Kgdb-bugreport] Problem getting kgdb to read kernel symbols. addresses shifted?
Date: Mon, 01 Oct 2007 16:35:37 -0400 [thread overview]
Message-ID: <sjmk5q6efom.fsf@pgpdev.ihtfp.org> (raw)
In-Reply-To: <4701448D.7070208@redhat.com> (Dave Anderson's message of "Mon\, 01 Oct 2007 15\:03\:41 -0400")
Dave,
Dave Anderson <anderson@redhat.com> writes:
> Configure the kernel with CONFIG_PHYSICAL_START less than
> or equal to CONFIG_PHYSICAL_ALIGN. Upon rebuilding my FC7
> kernel with CONFIG_PHYSICAL_START changed from 16MB to 1MB,
> with CONFIG_PHYSICAL_ALIGN left at 4MB, i.e.:
>
> CONFIG_PHYSICAL_START=0x100000
> CONFIG_PHYSICAL_ALIGN=0x400000
>
> The kernel gets compiled for, and runs at, a 4MB physical address:
>
> $ nm -Bn vmlinux | grep "^c04"
> c0400000 T _text
> c0400000 T startup_32
> c0401000 T startup_32_smp
> c0401080 t checkCPUtype
> c0401101 t is486
> ...
>
> Setting both of them to 0x400000 also works.
Indeed, it does. Thank you. Once I changed this, the new kernel
works great and the symbols map properly. yay. Now on to your
regularly-schedule debugging. :)
Thank you, Dave!
> Dave
-derek
--
Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
Member, MIT Student Information Processing Board (SIPB)
URL: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH
warlord@MIT.EDU PGP key available
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prev parent reply other threads:[~2007-10-01 20:36 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <sjmabr8j6d7.fsf@pgpdev.ihtfp.org>
[not found] ` <46FD03CD.9060404@windriver.com>
[not found] ` <sjmve9uj3d2.fsf@pgpdev.ihtfp.org>
[not found] ` <46FD1B6A.3000500@windriver.com>
[not found] ` <20070928114522.n0cdrcebykkgg408@webmail.mit.edu>
[not found] ` <46FD2CFB.9010404@windriver.com>
2007-09-28 21:45 ` [Kgdb-bugreport] Problem getting kgdb to read kernel symbols. addresses shifted? Pete/Piet Delaney
2007-09-28 22:18 ` Eric W. Biederman
2007-09-28 23:29 ` Derek Atkins
2007-09-28 23:40 ` Eric W. Biederman
2007-09-28 23:58 ` Derek Atkins
2007-09-29 0:32 ` Pete/Piet Delaney
2007-09-30 5:38 ` Vivek Goyal
2007-10-01 13:35 ` Dave Anderson
2007-10-01 18:44 ` Derek Atkins
2007-10-01 19:03 ` Dave Anderson
2007-10-01 20:35 ` Derek Atkins [this message]
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