Newsgroups: comp.lang.c
Path: utzoo!henry
From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: Ambiguity in definition of setjmp/longjmp makes them much less useful
Message-ID: <1990Oct10.152659.6334@zoo.toronto.edu>
Organization: U of Toronto Zoology
References: <1597@redsox.bsw.com> <1990Oct09.143521.24019@unx.sas.com>
Date: Wed, 10 Oct 90 15:26:59 GMT

In article <1990Oct09.143521.24019@unx.sas.com> sasrer@unx.sas.com (Rodney Radford) writes:
>I believe (just guessing really) that the original C used 'builtins' for the
>setjmp/longjmp functions, ie: they special cased them.

Nope.  The original pdp11 C compiler had a predictable stack-frame format
and could do stack unravelling right.
-- 
Imagine life with OS/360 the standard  | Henry Spencer at U of Toronto Zoology
operating system.  Now think about X.  |  henry@zoo.toronto.edu   utzoo!henry