From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Min Lee" <min.lee@gatech.edu>
Subject: [Q] guest system call doesn't do do_iret() ?
Date: Wed, 5 Dec 2007 23:22:51 -0500
Message-ID: <001901c837bf$abf4af80$0e00a8c0@MiniT61>
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Hello.
Basically I'd like to intercept guest's (of course, Linux) system call 
entry/exit,
so I've commented out fast path and I could intercept 'int 0x80' calls,
and I expected every system call should call xen's do_iret() , i.e,
HYPERVISOR_iret, but it doesn't seem that they call it !
Any idea or comments? What am I missing here?
If the guest doesn't use HYPERVISOR_iret, how do they return to userland?
Thanks in advance.

Min