On Wed, 2017-03-29 at 23:55 +0300, Stas Sergeev wrote: > 29.03.2017 07:38, Ricardo Neri пишет: > >> Probably you could also remove > >> the sldt and str emulation for protected mode, because, > >> as I understand from this thread, wine does not > >> need those. > > I see. I would lean on keeping the emulation because I already > > implemented it :), for completeness, and because it is performed in a > > single switch. The bulk of the emulation code deals with operands. > But this is not for free. > As Andy said, you will then need a syscall and > a feature mask to be able to disable this emulation. > And AFAIK you haven't implemented that yet, so > there is something to consider.
Right, I see your point. > >>>> You know the wine's > >>>> requirements now - they are very small. And > >>>> dosemu doesn't need anything at all but smsw. > >>>> And even smsw is very rare. > >>> But emulation is still needed for SMSW, right? > >> Likely so. > >> If you want, I can enable the logging of this command > >> and see if it is used by some of the DOS programs I have. > > It would be great if you could do that, if you don't mind. > OK, scheduled to the week-end. > I'll let you know. Thanks! > > >> But at least dosemu implements it, so probably it is needed. > > Right. > > > >> Of course if it is used by one of 100 DOS progs, then there > >> is an option to just add its support to dosemu2 and pretend > >> the compatibility problems did not exist. :) > > Do you mean relaying the GP fault to dosemu instead of trapping it and > > emulating it in the kernel? > Yes, that would be optimal if this does not severely break > the current setups. If we can find out that smsw is not in > the real use, we can probably do exactly that. > But other > instructions are not in real use in v86 for sure, so I > wouldn't be adding the explicit test-cases to the kernel > that will make you depend on some particular behaviour > that no one may need. > My objection was that we shouldn't > write tests before we know exactly how we want this to work. OK, if only SMSW is used then I'll keep the emulation for SMSW only.
