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Mail Archives: djgpp/2009/03/17/07:15:10

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From: Rugxulo <rugxulo AT gmail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: demand loaded?
Date: Tue, 17 Mar 2009 05:09:53 -0700 (PDT)
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Hey guys,
   I figured it might be more productive to ask here than bug you
through private e-mails.   :-)   Anyways, I'm wondering if DJGPP +
CWSDPMI loads the entire .EXE into RAM or only specific parts that are
loaded when needed ("demand loading"?). In other words, does a 3
MB .EXE always need 3 MB of RAM even if only a small portion of the
code is actually run? I get the impression that it does, but I also
read Eli Z. mention in an old post that debug info has no significance
in regard to the program's memory footprint in normal (non-debug)
execution. Is all of that correct? Anybody care to shed some light on
this?

P.S. On a related note, without wading through a billion boring tech
docs, I'm wondering whether ring 0 can support paging and whether
paging is only good for virtual memory (sounds like it, from what I've
briefly read).

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