Messages in this thread | | | Date | Wed, 18 Jan 2012 13:04:31 -0800 | From | "H. Peter Anvin" <> | Subject | Re: Compat 32-bit syscall entry from 64-bit task!? |
| |
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.
-hpa
| |