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From: matt@oddjob.UUCP
Newsgroups: comp.unix.questions
Subject: Re: question about signal
Message-ID: <14009@oddjob.UChicago.EDU>
Date: Wed, 30-Sep-87 18:43:27 EDT
Article-I.D.: oddjob.14009
Posted: Wed Sep 30 18:43:27 1987
Date-Received: Sat, 3-Oct-87 06:14:10 EDT
References: <720001@hpclmar.HP.COM>
Organization: Audible Boy Birdwatcher Society
Lines: 20

Michelle Ruscetta writes:
) 
)  Question about signal():
) 
)   Should the return from a signal handling routine specified by a call
)   to signal() go to the instruction which caused the signal, or to the 
)   instruction immediately following that which caused the signal?
) 
)   For example:    ...
)
)   I have run this example on two different machines, with different results; 
)   [one resumed at the instruction after the FPE], and the other returned 
)   to the instruction which caused the signal

Was the second machine a VAX-11/750?  If I remember rightly, 750's
have a microcode bug in the treatment of floating point exceptions
which causes exactly the behavior you say.
________________________________________________________
Matt	     University		matt@oddjob.uchicago.edu
Crawford     of Chicago     {astrovax,ihnp4}!oddjob!matt