undump and the fpa

[attcan!utzoo!henry at uunet.uu.net]

>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 at zoo.toronto.edu