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Re: [RFC] Move the frame zero PC check earlier
I'll respond to this in more depth later; I still disagree with much of
it :-) But I don't have time this moment, and I wanted to answer one
particular thing:
On Sat, May 13, 2006 at 06:42:44PM +0200, Mark Kettenis wrote:
> > And when we've run out of useful information, the stack appears to
> > end, and we're quite justified in reporting that the stack ended.
> > It's quite complex enough already without reporting "but the end of
> > the stack looks a little funny to me...".
>
> No, if a stack doesn't end properly on a platform where it should end
> properly, that's useful information that should be reported to the
> user.
Now you've gotten me really confused. PC == 0 is the "proper" end of
the stack in lots of platform ABIs; that's why the check was added to
frame.c in the first place instead of leaving it in the PA-RISC
specific file where it was just before it was added. That's exactly
why I want to detect it: because it signals a clean end to the stack.
--
Daniel Jacobowitz
CodeSourcery