hypercall execution path?

["Bryan D. Payne" <bryan@thepaynes.cc>]

I'm trying to trace the execution path taken by the system when I make a 
hypercall from a domU kernel.  What I'm seeing in the hypercall entry 
function in Xen is that the domU eip value points to a location in the 
domU hypercall page for the __HYPERCALL_sched_op hypercall, even though 
this is *not* the hypercall that I just called.

Could someone help clarify this for me?  Why would the vcpu for the 
guest domain have this seemingly incorrect eip value?

Thanks,
bryan

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Bryan D. Payne
Graduate Student, Computer Science
Georgia Tech Information Security Center
http://www.bryanpayne.org