Path: utzoo!utgpu!attcan!uunet!mcvax!jack
From: jack@cwi.nl (Jack Jansen)
Newsgroups: comp.unix.wizards
Subject: Re: dumping core on *(NULL) is not a function of your processor
Summary: Hack time....
Message-ID: <7610@boring.cwi.nl>
Date: 5 Aug 88 13:47:09 GMT
References: <253@iconsys.UUCP> <495@cvaxa.sussex.ac.uk> <11955@ncoast.UUCP> <2835@ttrdc.UUCP> <62735@sun.uucp>
Sender: news@cwi.nl
Organization: AMOEBA project, CWI, Amsterdam
Lines: 11


Well, there's a simple hack to get a binary format that doesn't
use a new magic number and will break hardly any existing programs:
Make ld generate ZMAGIC output with the first page full of zeroes. Of
course, this moves crt0.o into page 1 (and thus setting a_entry to
0x400 or something).

Now, the only trick needed is that the kernel recognizes the fact that page
0 is full of zeroes and doesn't map it......
	Jack Jansen, jack@cwi.nl (or jack@mcvax.uucp)
	The shell is my oyster.