Re: [i386newframe/PATCH] New i386newframe branch

[Mark Kettenis <kettenis@chello.nl>]

   Date: Thu, 01 May 2003 17:21:34 -0400
   From: Andrew Cagney <ac131313@redhat.com>

   >    > +  return &i386_frame_unwind;
   >    > +}
   > 
   >    Have you tried adding just the sigtramp unwinder?  I should get just 
   >    that addition debugged regardless - it should make migrating other ISAs 
   >    easier.
   > 
   > No I haven't.  I don't think I can.  The problem is that I simplified
   > the sigtramp unwinder a bit.  However in order to do so, I need to be
   > able to trust the normal unwinder to unwind the stack pointer
   > correctly.  Unfortunately the current code is a bit sloppy about this.

   Ah, yes, I know the feeling.  Tighten the camshaft cover, and a 
   push-rods slips.  Put that back, and the ....  Some times it's easier to 
   just replace the engine.

   It is unfortunatly something of an all or nothing afair.  I might still 
   get curious though to see just what happens.

I might have something else for you to toy with.  I've a prototype of
a DWARF2 CFI unwinder ready, which is working fine in my i386newframe
branch.  I still need to clean up several hacks, but I might be able
to check it in soon.

Mark