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 for kexec@lists.infradead.org; Fri, 11 Oct 2013 17:02:27 +0000
Date: Fri, 11 Oct 2013 18:01:39 +0100
From: Matthew Garrett <mjg59@srcf.ucam.org>
Subject: Re: kexec: Clearing registers just before jumping into purgatory
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To: Richard Weinberger <richard@nod.at>
Cc: keir@xen.org, Kees Cook <keescook@chromium.org>, Richard Weinberger <richard.weinberger@gmail.com>, Daniel Kiper <daniel.kiper@oracle.com>, kexec@lists.infradead.org, LKML <linux-kernel@vger.kernel.org>, xen-devel@lists.xen.org, hbabu@us.ibm.com, "Eric W. Biederman" <ebiederm@xmission.com>, jbeulich@suse.com, "H. Peter Anvin" <hpa@linux.intel.com>, Vivek Goyal <vgoyal@redhat.com>, david.vrabel@citrix.com

On Fri, Oct 11, 2013 at 06:59:41PM +0200, Richard Weinberger wrote:
> Am 11.10.2013 18:55, schrieb Matthew Garrett:
> > On Fri, Oct 11, 2013 at 06:47:19PM +0200, Richard Weinberger wrote:
> > 
> >> But you still need a magic tool which create you this list.
> > 
> > I just read /proc/kallsyms. I'm really not doing anything complicated.
> > 
> >> If you have a tool which takes two kernel images and create such
> >> a delta, fine.
> > 
> > Isn't that ksplice?
> 
> So, you have a variant of ksplice which is able to kexec?

No, I manually look up some addresses from /proc/kallsyms and then 
modify them in the second kernel.

-- 
Matthew Garrett | mjg59@srcf.ucam.org

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