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

H. Peter Anvin
2014-04-11T18:29:47Z

On 04/11/2014 11:27 AM, Brian Gerst wrote:
> Is this bug really still present in modern CPUs? This change breaks
> running 16-bit apps in Wine. I have a few really old games I like to
> play on occasion, and I don't have a copy of Win 3.11 to put in a VM.

It is not a bug, per se, but an architectural definition issue, and it
is present in all x86 processors from all vendors.

Yes, it does break running 16-bit apps in Wine, although Wine could be
modified to put 16-bit apps in a container. However, this is at best a
marginal use case.

-hpa