Messages in this thread | | | Date | Wed, 18 Jan 2012 13:21:13 -0800 | From | "H. Peter Anvin" <> | Subject | Re: Compat 32-bit syscall entry from 64-bit task!? |
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On 01/18/2012 01:04 PM, H. Peter Anvin wrote: > On 01/18/2012 01:01 PM, Linus Torvalds wrote: >> On Wed, Jan 18, 2012 at 12:55 PM, H. Peter Anvin <hpa@zytor.com> wrote: >>> >>> If we're going to use bits in an existing register field I would be >>> happier if we used bits [31:16] of CS, which are unlikely to ever be >>> used for anything. >> >> See my note about that: I would have preferred CS or ORIG_AX myself, >> but that breaks existing binaries. So that isn't really an option. >> > > Fair enough. Sigh. I still think an actual pseudo-register would be > better. >
Roland, could you refresh my memory what your objection to this was?
-hpa
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