On Tue, Nov 06, 2007 at 10:17:12PM +0100, Staf Verhaegen wrote: > Hello wine developers, > > I am an AROS developer (http://www.aros.org); that is an open source > implementation of the old AmigaOS. It has also the possiblity to run > hosted on other OSes and is thus very similar to wine. I know that this > group is for wine posts but I think I could reuse much of the knowledge > gained by the wine developers for AROS. > > Recently there has been discussion about the use of the %fs and %gs > segment for AROS purposes and thus also for the hosted version. > As wine also has to handle these registers, I am interested to know how > wine handles these registers. Or doesn't wine have to take these registers > into account ? > I did download the 0.9.48 source code of wine and I only did find some > places where a proper saving and restoring of these registers was done. Is > there something I am overlooking ? >
Win32 (and so Wine) uses %fs as the thread selector. It needs to stay constant over process switches (as in "saved") and the base virtual address must be settable. Older Wines allocate a (LDT?) selector themselves for %fs, newer ones have it use a GDT (?) slot. %gs is not used in 32bit mode usually, but Win16 programs use it and so it should be allocatable and savable too. Ciao, Marcus
