Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site fortune.UUCP
Path: utzoo!linus!security!genrad!grkermit!masscomp!clyde!floyd!harpo!seismo!hao!hplabs!hpda!fortune!rpw3
From: rpw3@fortune.UUCP
Newsgroups: net.unix-wizards
Subject: Re: Dereferencing NULL pointers - (nf)
Message-ID: <2036@fortune.UUCP>
Date: Sat, 17-Dec-83 04:06:08 EST
Article-I.D.: fortune.2036
Posted: Sat Dec 17 04:06:08 1983
Date-Received: Tue, 20-Dec-83 01:24:10 EST
Sender: notes@fortune.UUCP
Organization: Fortune Systems, Redwood City, CA
Lines: 15

#R:rlgvax:-142700:fortune:11600028:000:489
fortune!rpw3    Dec 17 00:25:00 1983

The Fortune 32:16 has has a segment-based MMU, and in user mode the
first location of the text-seg is 0, so deref'd NULL is whatever the
beginning of the text is (usually crt.0). But if the program is "split
I/D", i.e. shared text, the first location of the DATA seg is 0x200000,
which is amusing to some old programs.

Rob Warnock

UUCP:	{sri-unix,amd70,hpda,harpo,ihnp4,allegra}!fortune!rpw3
DDD:	(415)595-8444
USPS:	Fortune Systems Corp, 101 Twin Dolphins Drive, Redwood City, CA 94065