linux-kernel - Calling system call from User-mode Linux?

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Date:	Sat, 10 Jul 2010 18:00:19 -0400
From:	Philip Wernersbach <dubs35@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Calling system call from User-mode Linux?

I'm trying to add some functionality to User-mode Linux that requires
the UML kernel to call a custom syscall I've added to the host kernel.
This should be technically possible since UML runs in the userspace,
but I can't figure out how to call the syscall, as the syscall()
function isn't defined in UML. Are there other ways I can accomplish
this?

Thanks,
Phil
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