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Re: [Xen-devel] kexec: Clearing registers just before jumping into purgatory
- To: Matthew Garrett <mjg59@xxxxxxxxxxxxx>
- From: Richard Weinberger <richard.weinberger@xxxxxxxxx>
- Date: Fri, 11 Oct 2013 18:33:23 +0200
- Cc: keir@xxxxxxx, Kees Cook <keescook@xxxxxxxxxxxx>, Daniel Kiper <daniel.kiper@xxxxxxxxxx>, kexec@xxxxxxxxxxxxxxxxxxx, LKML <linux-kernel@xxxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxx, hbabu@xxxxxxxxxx, "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>, jbeulich@xxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxxxxxxxx>, Vivek Goyal <vgoyal@xxxxxxxxxx>, david.vrabel@xxxxxxxxxx
- Delivery-date: Fri, 11 Oct 2013 16:34:56 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On Fri, Oct 11, 2013 at 5:48 PM, Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote:
> On Fri, Oct 11, 2013 at 11:44:50AM -0400, Vivek Goyal wrote:
>
>> Just Curious. How is it useful. IOW, what's your use case of booting a new
>> kernel and then jumping back.
>
> I'm kexecing into a kernel with a modified /dev/mem, modifying the
> original kernel and then jumping back into it.
How do you update the original kernel?
Sounds interesting.
--
Thanks,
//richard
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