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Subject: Re: [patch] tls-2.5.30-A1
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Ingo Molnar <mingo@elte.hu>, linux-kernel@vger.kernel.org,
       Alexandre Julliard <julliard@winehq.com>,
       Luca Barbieri <ldb@ldb.ods.org>
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On Wed, 2002-08-07 at 19:33, Linus Torvalds wrote:
>  - keep the TLS entries contiguous, and make sure that segment 0040 (ie
>    GDT entry #8) is available to a TLS entry, since if I remember
>    correctly, that one is also magical for old Windows binaries for all
>    the wrong reasons (ie it was some system data area in DOS and in 
>    Windows 3.1)

Lots of BIOSes (a million monkeys bashing on typewriters will write
something that passes some BIOS vendor QA in about 2 seconds) illegally
assume that 0040: points at the BIOS data segment 0040 when making APM32
calls. Sufficient that Windows makea it so and its never going to get
corrected.

> Then, for double extra bonus points somebody should look into whether
> those damn PnP BIOS segments could be simply made to be TLS segments
> during module init. I don't know if that PnP stuff is required later or
> not.

PnPBIOS has to rewrite segments as it goes for data passing. It doesnt
really matter where you stuff them though.


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