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Date: Wed, 15 May 2002 19:21:32 +0300
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
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To: lauras AT softhome DOT net
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In-reply-to: <2225079923.20020515154129@softhome.net> (message from Laurynas
	Biveinis on Wed, 15 May 2002 15:41:29 +0100)
Subject: Re: emacs under w2k
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> Date: Wed, 15 May 2002 15:41:29 +0100
> From: Laurynas Biveinis <lauras AT softhome DOT net>
> 
> Well I've hit something interesting - it aborts in malloc() after
> all...

As more or less expected, sigh...

> Any hints are welcome and stay tuned...

Here's a LARGE hint: Emacs doesn't use our malloc at all.  It uses its
own implementation of a relocatable allocator (see gmalloc.c and
ralloc.c), whose only interface to the DJGPP library is via sbrk.

So I think the next thing to find out is whether it explodes inside
sbrk (which would mean it's our fault) or in the gmalloc/ralloc code.

If the latter, I'd try to look for large positive values being
interpreted as negative numbers.  gmalloc is notorious for mixing
signed and unsigned variables in ingenious ways.

Btw, Charles will probably ask this at some point, so I'll answer
proactively: Emacs sets the Unixy sbrk bit in _crt0_startup_flags.