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Re: [Xen-devel] Re: [PATCH] Xen Guest Kexec

On 2 Mar 2006, at 09:16, Gerd Hoffmann wrote:

Thanks, it at least doesn't crash any more. It doesn't work yet either,
but that most likely is a bug in setting up my page tables ...

btw: What happens if I try to install a gdt with zero entries? Can I do
that?  Are there some default code/data/stack segments (full 4G minus
xen hole) available I can use then?  IIRC the domain builders don't
setup a gdt, so there must be some which are used at boot time until the
 OS kernel installes its own ...

The default segment descriptors are *always* available. A guest can only install up to a 14-page GDT: the 15th and 16th pages are reserved by Xen and always present.

 -- Keir

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