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From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.unix.wizards
Subject: Re: Referencing NULL pointers
Message-ID: <2278@auspex.auspex.com>
Date: 24 Jul 89 18:47:41 GMT
References: <1989Jul14.092231.24845@inquiry.org> <19367@paris.ics.uci.edu> <10515@smoke.BRL.MIL> <168@jma.UUCP> <1501@ibmpa.UUCP>
Reply-To: guy@auspex.auspex.com (Guy Harris)
Organization: Auspex Systems, Santa Clara
Lines: 8

>In retrospect I think we probably should have gone the other way on this;
>or at provided a way to test code with different behaviour.

Yes.  The paged versions of System V from AT&T - the VAX one for sure,
and probably the 3B2 one as well, at least - have a "-z" flag that tells
the linker to create an image with no page zero.  Unfortunately, it's
not the default, which means there's still a fair bit of sloppy code in
S5R3, but at least you do have the choice of enforcing correct behavior.