From:	flan AT extempo DOT com (Ian Flanigan)
Subject:	Re: Decompile...
23 Jul 1998 03:50:57 -0700 :
Message-ID:	<35B67FB8.5FF430C0.cygnus.gnu-win32@extempo.com>
References:	<003f01bdac17$99ddd800$3502280a AT vhasecure DOT net>
Mime-Version:	1.0
To:	Fred Reimer <Fred DOT Reimer AT bellsouth DOT net>
Cc:	tolj AT uni-duesseldorf DOT de, "Marcel R." <marshall AT cwb DOT matrix DOT com DOT br>,
	gnu-win32 AT cygnus DOT com

Fred Reimer wrote:
> 
> I would think that it would be possible to create cryptic C code for an exe
> that at least shows the types of variables passed between functions and the
> auto variables used within the function in addition to the general flow of
> the function.

Actually, there have been many decompiler projects in the past.  One was
used to de-compile the Internet Worm back in '88.  I had another for
MSDOS around '90 or so.  The one used on the worm, if I recall
correctly, made use of some "features" of the code generation routines
in pcc (the old portable C compiler on which nearly all C compilers
shipped with UNIX used to be derived from) to re-generate the source
code.  The MSDOS one was just nasty and basically turned assembly code
into C, complete with bit shifts and carry testing.  It was gross and
unuseful.

Ian
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flan AT lean DOT to
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