Re: [patch] tls-2.5.30-A1

Linus Torvalds
2002-08-07T18:53:36Z

On Thu, 8 Aug 2002, Stephen Rothwell wrote:

> On Wed, 7 Aug 2002 11:33:23 -0700 (PDT) Linus Torvalds <torvalds@transmeta.com> 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)
>
> segment 0040 is used by the APM driver to work around bugs in some BIOS
> implementations where some (brain-dead) BIOS writer has assume that the
> BIOS data area is still available in protected mode ...

Ok, sounds like that one ends up having to be a fixed segment (I wonder if
Wine can take advantage of it? looks like it is hardcoded to base 0x400,
which is probably fine for Wine anyway - just map something at the right
address - but it looks CPL0 only? Might be ok to just make it available to
user space).

Linus