Re: [RFC PATCH 3/3] boot bzImages under paravirt

[Jeremy Fitzhardinge]

Eric W. Biederman wrote:
>>> load the segments as well.
>>>
>>> Gujin looks like it loads just %es and %ds.
>>>   
>>>       
>> We should be able to make do with that until we've got our own gdt.
>>     
>
> Right after the segments loads we have:
> 	leal 0x40(%esi), %esp
> 	call 1f
> 1:	popl %ebp
> 	subl $1b, %ebp
>
> That uses %ss and %ds.  Can we use a segment override on a call
> instruction?
>   

I overlooked Gujin missing %ss.  That's harsh.  Easy for them to fix,
presumably.

> Yes.  Exactly like we do for real mode code, and with exactly the same
> values.  Just in a little different format.

Well, fits in well with Xen's requirements, since it wants ELF notes
there for exactly the same reason.

    J
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