Date: Wed, 12 Nov 1997 12:30:04 +0000 (   )
From: "Gurunandan R. Bhat" <grbhat AT unigoa DOT ernet DOT in>
To: Johan Levin <johan AT technologist DOT com>
Cc: djgpp AT delorie DOT com
Subject: Re: GAS segment override
In-Reply-To: <3468BBBC.1220@technologist.com>
Message-Id: <Pine.LNX.3.91.971112122555.8563B-100000@aditya.unigoa.ernet.in>
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Precedence: bulk



On Tue, 11 Nov 1997, Johan Levin wrote:

> Hi!
> 
> I'm making a simple ISR that will hook IRQ 0.
> To set the ds to the correct value I read
> ___djgpp_ds_alias. This variable is relative to
> the cs-segment.
> 
> How do I do something like:
> 	mov	ax, cs:[___djgpp_ds_alias]
> I've tried:
> 	cs:
          ^

I am not very sure of this but I suspect that the trailing : is the 
culprit. In gas you give a segment override by just writing a cs, for 
example:

	cs
	movw	___djgpp_ds_alias, %ds

I hope that helps.