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Re: TSS switching

From: Marcus Brinkmann
Subject: Re: TSS switching
Date: Thu, 11 Oct 2001 01:02:32 +0200
User-agent: Mutt/1.3.22i

On Wed, Oct 10, 2001 at 06:46:22PM -0400, Roland McGrath wrote:
> > Can I/O permission violations be catched in userspace, by emulating the
> > io_emulate exception?  Then I guess we can just let the default
> > implementation return an error anyway.
> I'm not really sure what you are asking here.

If you run a DOS program in a DOS emulator, you probably want to emulate
some of the I/O port accesses.  I think that's io_emulation all about, right? 
A DOS emulator would catch the exception and either add permission to the
task and allow the access, deny the access, or emulate it.

`Rhubarb is no Egyptian god.' Debian http://www.debian.org brinkmd@debian.org
Marcus Brinkmann              GNU    http://www.gnu.org    marcus@gnu.org

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