Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: attcan!utzoo!henry@uunet.uu.net
Newsgroups: comp.sys.sun
Subject: Re: undump and the fpa
Message-ID: <8811250522.AA24556@uunet.UU.NET>
Date: 9 Dec 88 21:21:33 GMT
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Organization: Rice University, Houston, Texas
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Approved: Sun-Spots@rice.edu
Original-Date: Fri, 25 Nov 88 00:22:29 EST
X-Sun-Spots-Digest: Volume 7, Issue 40, message 4 of 8

>I am trying to use undump on a program that uses the fpa.  Undump works
>fine on the version of this program that uses the 68881, but seems to hang
>the first time the fpa is used.  I'm actually not surprised at this, since
>the fpa is a device...and is probably accessed by doing some open-file
>like operation.

No, the FPA looks like a bunch of really strange memory locations off in a
funny corner of the address space, plus occasional signals.  Two things
come to mind:  (1) saving FPA state (don't know if SunOS does this, and
doubly don't know if undump is smart enough to set things up to restore
it);  (2) setting up the FPA signal handler, which is an absolute
necessity (see the Floating Point Programmer's Guide).

	Henry Spencer at U of Toronto Zoology
	uunet!attcan!utzoo!henry henry@zoo.toronto.edu