Messages in this thread | | | Date | Sun, 13 Jul 2008 16:56:46 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 1/3] x86_64: further cleanup of 32-bit compat syscall mechanisms |
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Jeremy Fitzhardinge wrote: > AMD only supports "syscall" from 32-bit compat usermode. > Intel and Centaur(?) only support "sysenter" from 32-bit compat usermode. > > Set the X86 feature bits accordingly, and set up the vdso in > accordance with those bits. On the offchance we run on in a 64-bit > environment which supports neither syscall nor sysenter from 32-bit > mode, then fall back to the int $0x80 vdso. > > Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
-hpa
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