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From: dave@ur-valhalla.UUCP (Dave Carlson)
Newsgroups: net.unix-wizards
Subject: Re: Microport Unix -- Large Model Problems
Message-ID: <840@ur-valhalla.UUCP>
Date: Wed, 5-Nov-86 10:06:56 EST
Article-I.D.: ur-valha.840
Posted: Wed Nov  5 10:06:56 1986
Date-Received: Wed, 5-Nov-86 22:22:31 EST
References: <1376@batcomputer.TN.CORNELL.EDU>
Reply-To: dave@valhalla.UUCP (Dave Carlson)
Organization: EE VLSI Graduate Research Facility, UR, Rochester NY
Lines: 11


A potential problem I smacked into yesterday when porting BSD to SV/AT
is ioctl(2) expects as the third argument:
union	{ int iarg;
	char *cparg;}
Problem is that the union will pull 4 bytes off the stack (in large model)
but the program calling with an integer will only push 2 bytes.  Oh S*$&!
I cast my integer args long and everything seems ok but what a pain...

I'm always a bit wary when I have to watch even system calls.
Raver dave