From:	Thomas Demmer <demmer AT LSTM DOT Ruhr-UNI-Bochum DOT De>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Flexible Linking for GCC?
Date:	Mon, 26 Jan 1998 09:19:51 +0100
Organization:	Lehrstuhl fuer Stroemungsmechanik
Message-ID:	<34CC4727.3F1266C9@LSTM.Ruhr-UNI-Bochum.De>
References:	<34CAEB55 DOT 6CEC1041 AT thegrid DOT net> <6ah0i9$cgf$3 AT winter DOT news DOT erols DOT com> <34CC3F37 DOT 567B5178 AT thegrid DOT net>
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Eric Lange wrote:
[...]
> >
> > Why would you want to do this? Only real reason I can think of for replacing
> > the DJGPP startup code is so one could load some kind of virus-infested
> > startup code in it's place.....
> 
>   I take some offense to that remark.  I can think of several reasons why
> someone would want to do that.  In my case, I am developing a hardware
> virtualizer for DOS to allow devices to be emulated in software.  You may not be
> aware, but this is not an easy task in an operating system that gives free reign
> to the application.  I have developed most of the core code, but I need some way
> to develop (and allow others to develop) driver code, and I don't want to force
> them to use assembly language.  I have my own loader, I just need some way to
> package the code in some other format than an .EXE.
> 
> So there.  Does anybody (else) have any ideas?
Not really. I guess it is possible, look at the
specs file and djgpp.djl. You also might have to change something
in the BFD of ld, I am not sure about that. What you will
definitely need is to convince MASM to produce COFF output. 
For changing the startup code, I think Bill Currie has written
a bootstrap loader for djgpp programs, to boot an OS that
is based on DJGPP. Though this is not what you want, I guess 
you can steal some good ideas from him ;-)
Check the news archive on www.djgpp.com,  and I think
I have seen it on the djgpp/v2tk subdirectory.
HTH

-- 
Ciao
Tom

*************************************************************
* Thomas Demmer                                             *
* Lehrstuhl fuer Stroemungsmechanik                         *
* Ruhr-Uni-Bochum                                           *
* Universitaetsstr. 150                                     *
* D-44780  Bochum                                           *
* Tel: +49 234 700 6434                                     *
* Fax: +49 234 709 4162                                     *
* http://www.lstm.ruhr-uni-bochum.de/~demmer                *
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