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Groups > linux.kernel > #1521536 > unrolled thread

Re: [PATCH 0/4] x86: enable User-Mode Instruction Prevention

Started byOne Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
First post2016-11-14 12:10 +0100
Last post2016-11-14 19:40 +0100
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  Re: [PATCH 0/4] x86: enable User-Mode Instruction Prevention One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-11-14 12:10 +0100
    Re: [PATCH 0/4] x86: enable User-Mode Instruction Prevention Harald Arnesen <skogtun.linux@gmail.com> - 2016-11-14 19:40 +0100

#1521536 — Re: [PATCH 0/4] x86: enable User-Mode Instruction Prevention

FromOne Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Date2016-11-14 12:10 +0100
SubjectRe: [PATCH 0/4] x86: enable User-Mode Instruction Prevention
Message-ID<sDnjb-6cm-7@gated-at.bofh.it>
> I took a closer look at the dosemu code. It appears that it does not

That doesn't tell you want DOS itself will try and do...

> purposely utilize SGDT to obtain the descriptor table while in vm86. It
> does use SGDT (in protected mode) to emulate certain functionality such
> as the Virtual xxx Driver. In such a case, UMIP needs to be disabled.
> However, this code seems to be disabled [1]. dosemu includes an i386
> emulator that in some cases uses the actual instructions of the host
> system. In such cases, UMIP might be needed to be disabled.

Is anyone actually still using DOSemu these days or are people all
using DOSbox ?

Alan

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#1521993

FromHarald Arnesen <skogtun.linux@gmail.com>
Date2016-11-14 19:40 +0100
Message-ID<sDukH-2cH-53@gated-at.bofh.it>
In reply to#1521536
Den 14/11/2016 11:59, skrev One Thousand Gnomes:

> Is anyone actually still using DOSemu these days or are people all
> using DOSbox ?
>
> Alan

One thing lacking from DOSbox is TCP/IP networking.
-- 
Hilsen Harald

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