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RE: [Xen-devel] can we disable fast system calls?

Aren’t fast system calls more of a feature of the OS than xen? If your OS’s system call library uses int 80h instead of sysenter then I guess you’ll go to that IDT vector directly. This is an HVM that you’re looking to do this? Please update me in case I didn’t get this correctly.



From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Swapna Shingre
Sent: Thursday, December 25, 2008 4:31 PM
To: keir.fraser@xxxxxxxxxxxxx; xen-devel@lists.xensource.com
Subject: [Xen-devel] can we disable fast system calls?


I want to modify xen 3.3.0 so that control transfers to xen after system calls. How can I disable fast system call handlers, so that int 0x80h functions just like all other interrupts.

Is there any older version of xen which does not have fast system calls?

Please help.


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