Path: utzoo!attcan!uunet!samsung!shadooby!mailrus!tut.cis.ohio-state.edu!pt.cs.cmu.edu!rochester!cornell!ken
From: ken@gvax.cs.cornell.edu (Ken Birman)
Newsgroups: comp.sys.isis
Subject: Re: Bugs in interacting with the formatted output conversion functions ?
Message-ID: <34504@cornell.UUCP>
Date: 21 Nov 89 16:23:52 GMT
References: <1989Nov16.221608.29876@oxtrap.aa.ox.com> <34355@cornell.UUCP>
Sender: nobody@cornell.UUCP
Reply-To: ken@gvax.cs.cornell.edu (Ken Birman)
Organization: Cornell Univ. CS Dept, Ithaca NY
Lines: 23

In article <1989Nov16.221608.29876@oxtrap.aa.ox.com>
           tc@oxtrap.aa.ox.com (Tse Chih Chao) writes:
>The following small program does not work under isis and it gives the
>following  output:
>   ... example of a problem under a MIPS (DEC 3100) version of ISIS

I reproduced this problem at Cornell and figured out that it was
caused by a minor error in the MIPS port.

The problem is that the stack pointer ISIS is using for spawned
tasks is not double-word aligned and MIPS turns out to care.

To correct this problem, edit the ISIS source file
	clib/cl_task.c

Line 473 currently reads:
	stackp = (char*)((int)stackp & ~0x3);
Change this to:
	stackp = (char*)((int)stackp & ~0x7);

Recompile and your program will run correctly.

Ken Birman