patch to improve i386 epilogue (version 4)

[Jeffrey A Law]

  In message < 199810092057.QAA16985@jwlab.FEITH.COM >you write:
  > > Now, I'd like to suggest it again.  We could make DWARF2 the default
  > > format on systems that ship with GDB.  If that allows us to free up a
  > > register, so much the better; as we all know the x86 can use as many
  > > registers as it can get.  If there are problems with DWARF2 support,
  > > this will help to shake them out.
  > 
  > Seems reasonable to me, however I'm not up to speed on what all this
  > impacts.  Is DWARF2 the most versatile debugging format?  Is there any
  > issue with the OS supplied gdb not being up to date?
dwarf2 is the most versatile of the existing formats gcc & gdb support.  There
may be other formats that aren't supported by our tools that may be better.


jeff