[RFA] Improve Sparc epilogue analysis

[Michael Snyder]

"David S. Miller" wrote:
> 
>    From: Michael Snyder <msnyder@redhat.com>
>    Date: Wed, 24 Apr 2002 16:14:56 -0700
> 
>    In this case, I don't believe you got the frameless_p case
>    right.  First, you don't seem to have changed the definition
>    of SKIP_PROLOGUE_FRAMELESS_P in tm-sparc.h.  Second, your
>    implementation of sparc_prologue_frameless_p is not
>    functionally equivalent to the old one.  If it goes thru
>    the new, symbolic path, it will not return the same result.
> 
> SKIP_PROLOGUE_FRAMELESS_P died within the past day or two from the
> whole GDB tree, perhaps you didn't notice :-)

No I didn't.  I don't read every message on this list.

> 
> I'd like to ask that you re-review this change, given this, please.

The part that's mentioned in the changelog entry is OK, except
you can remove sparc_skip_prologue_frameless_p (and say so in
the changelog) rather than rewrite it.

The parts that are NOT mentioned in the changelog (your changes
to the logic in sparc_init_extra_frame_info) are not OK, first
because you didn't mention them in the changelog, and second 
because I can't convince myself that they are right.

I'd like you to resubmit this patch with those modifications, please.

Michael