Re: [Crash-utility] Re: [Xen-devel] [PATCH] Add xen_phys_start value in the crash info note

[Dave Anderson <anderson@xxxxxxxxxx>]

Keir Fraser wrote:
> On 30/5/08 06:13, "Itsuro ODA" <oda@xxxxxxxxxxxxx> wrote:
>
>   
> > This patch makes the vmcore utilities (ex. crash, makedumpfile) be
> > able to get the relocation address of the xen hypervisor from a vmcore.
> > It is necessary for the utilities to find the data of the hypervisor
> > structures.
> >
> > Note that this patch does not raise any comptibility issue for the
> > utilities (which I know) nor the other components of xen.
> >     
> Since it both changes the size of the crash_info elf note, and adds the new
> field in the middle of the crash_info structure, how can it not affect
> compatibility?
>
>  -- Keir
>   
Itsuro did it that way on purpose.  It maintains backwards compatibility by
keeping the dom0_pfn_to_mfn_frame_list_list field as the last field in the
PT_NOTE.  crash doesn't know what a crash_xen_info_t structure is, but only
its old and new size.

Dave



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