On Mon, Feb 29, 2016 at 05:33:16PM -0500, Brian Gerst wrote: > SYSENTER doesn't save EFLAGS so we have to fudge it by pushing the > kernel's flags. Most user programs never set AC, so by adding it to > the test for flags to clear we can avoid the CLAC or POPF in the > common case that it is already clear.
Yeah, Andy just explained it to me on IRC. Thanks guys.
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Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
