Messages in this thread | | | Date | Fri, 04 Sep 2009 09:52:54 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [tip:x86/asm] x86/i386: Make sure stack-protector segment base is cache aligned |
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On 09/04/2009 09:01 AM, Jeremy Fitzhardinge wrote: >>> >> It's correct that it doesn't make any difference for access, only for load. >> > > Well, to be completely precise, restore. When returning to usermode, > the "pop %seg" is slightly faster if you're restoring a null selector, > which is typically the case for %fs as 32-bit usermode doesn't use it. >
That's a segment load...
-hpa
-- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.
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