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Re: [Xen-devel] Re: [PATCH]: kexec: framework and i386



Hi,

I'll send a patch for dom0 image extract (from kdump) script.

Update is..
- get register values in dom0 context from kdump's ELF Core PT_NOTE header.
- get cr3 register value in context info from vcpu.
- now you can look vmlinux symbols from gdbserver-xen.

Todo:
- It support only single processor now.
- ELF Core output.

On 4/24/06, Kazuo Moriwaka <moriwaka@xxxxxxxxxxxxx> wrote:
Hi,

On 4/24/06, Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx> wrote:
> > When a panic occurs, Linux kexec jumps into the preloaded
> > kdump kernel (if any).  This kernel then reinitiases the
> > hardware, using its own device drivers and uses these to
> > write out the dump to disk.  ISTR that the dump format is
> > currently ELF, although I remember some talk on the Fastboot
> > ML about adding some extra headers to make OS debugging easier.
>
> Is Xen and the dom0 kernel dumped as as separate ELF cores?

I'm working on clipping domain image from whole-machine dump for x86_32 now.
Now my prototype reads ELF core and write dom0 image.

todo:
- Output format is not ELF core yet. Xen domain core image
format(works with gdbserverxen).
- register information is not work well.

--
Kazuo Moriwaka

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