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Date:      Thu, 11 Sep 1997 09:14:02 +0930
From:      Greg Lehey <grog@lemis.com>
To:        Andrew Gallatin <gallatin@CS.Duke.EDU>
Cc:        =?iso-8859-1?Q?S=F8ren_Schmidt?= <sos@sos.freebsd.dk>, Mike Smith <mike@smith.net.au>, jkh@time.cdrom.com, emulation@FreeBSD.ORG
Subject:   Re: Net posting: SCO gets Linux emulation
Message-ID:  <19970911091402.24274@lemis.com>
In-Reply-To: <199709102240.SAA22196@hurricane.cs.duke.edu>; from Andrew Gallatin on Wed, Sep 10, 1997 at 06:40:38PM -0400
References:  <199709101405.AAA00810@word.smith.net.au> <199709101533.RAA11723@sos.freebsd.dk> <199709102240.SAA22196@hurricane.cs.duke.edu>

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On Wed, Sep 10, 1997 at 06:40:38PM -0400, Andrew Gallatin wrote:
>
> Søren Schmidt writes:
>> In reply to Mike Smith who wrote:
>>>> Could be interesting and/or instructional, yes?
>>>
>>> Moderately.  It's somewhat barer-bones than our support so far.
>>
>> It of virtually no use to us. I've looked closer, and there is
>> ALOT they have to learn :)
>>
>>> This is all pretty unscientific; without sitting down and doing a
>>> one-to-one comparison it's a bit difficult to convey the relative
>>> "feel" of the two emulations.
>>
>> I'd say thiers is a "just get hello world running" type of emulator...
>
> Well, its somewhat interesting because it runs entirely in userland
> and traps system calls via a SEGV handler.

Ugh.  Is this what we have come to expect of SCO?

> And because of this, I imagine that its a good bit slower.  Also,
> their '$LINUX_ROOT' path remapping is interesting if only for its
> flexibility, but their choice of what paths to remap is very
> haphazard compared with the {Free,Net}BSD approach.

Doesn't sound like a serious implementation effort to me.

> BTW -- should anybody care, I just ported it to Solaris/x86 (which I'm
> forced to deal with at work).  I'd be happy to give out the diffs.
> It runs Adobe Acrobat just fine (well, after installing the FreeBSD
> linux-libs pkg ;-)

Well, I suppose there's that advantage, that it's portable.

Greg



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