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

H. Peter Anvin
2014-04-12T17:19:14Z

So Wine regressed and noone noticed? They doesn't sound like an active user base.

On April 11, 2014 9:44:22 PM PDT, Brian Gerst <brgerst@gmail.com> wrote:
>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.

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