Re: [tip:x86/urgent] x86-64, modify_ldt: Ban 16-bit segments on 64-bit kernels

Brian Gerst
2014-04-12T04:44:26Z

On Fri, Apr 11, 2014 at 2:50 PM, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
> On Fri, Apr 11, 2014 at 11:45 AM, Brian Gerst <brgerst@gmail.com> wrote:
>>
>> I haven't tested it recently but I do know it has worked on 64-bit
>> kernels. There is no reason for it not to, the only thing not
>> supported in long mode is vm86. 16-bit protected mode is unchanged.
>
> Afaik 64-bit windows doesn't support 16-bit binaries, so I just
> assumed Wine wouldn't do it either on x86-64. Not for any real
> technical reasons, though.
>
> HOWEVER. I'd like to hear something more definitive than "I haven't
> tested recently". The "we don't break user space" is about having
> actual real *users*, not about test programs.
>
> Are there people actually using 16-bit old windows programs under
> wine? That's what matters.
>
> Linus

I just verified that the game does still run on a 64-bit kernel
(3.13.8-200.fc20.x86_64). It needed an older version of Wine, but
that's a Wine regression and not kernel related.