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From: ark@alice.UUCP (Andrew Koenig)
Newsgroups: comp.lang.c
Subject: Re: setjmp/longjmp question
Message-ID: <8967@alice.UUCP>
Date: 25 Feb 89 17:29:46 GMT
References: <8514@polyslo.CalPoly.EDU>
Distribution: na
Organization: AT&T Bell Laboratories, Liberty Corner NJ
Lines: 12

In article <8514@polyslo.CalPoly.EDU>, ttwang@polyslo.CalPoly.EDU (Sir Hoyt) writes:

> What I want to know is the behavior of setjmp/longjmp on other machines.
> Would longjmp() clober all local variables if assuming RISC machine, and
> automatic register allocation?

In ANSI C, longjmp is permitted to clobber all local variables that are
not declared volatile.  In earlier C implementations, longjmp tends
to clobber all register variables but leave the rest alone.
-- 
				--Andrew Koenig
				  ark@europa.att.com