Hi,
  this patch adds gdbserver support for sparc64 on Linux.

I was able to test a hello world application, placing breakpoints, do 
step-by-step, single stepping, and stepping into glibc calls.

Additionally, I ran the gdb dejagnu test suite, finding basically stuff 
that fails on sparc native or other gsbserver ports.

This patch provides 64-bits support only; v8plus is not supported, since 
it would have required bi-arch support, thus undesirably extending the 
change scope to gdb as well.
Background: v8plus is a 32-bits binary type that has some insns which 
modify the upper half of the 64-bits registers, therefore involving a 
32/64 variable size registers in terms of gdb/gdbserver communication.
Please refer to 
http://sourceware.org/ml/gdb-patches/2006-05/msg00268.html for further 
background information.

Watchpoints are not supported by this patch.
-------------

2008-10-31  Daniel Gutson  <dgutson@codesourcery.com>

       * configure.tgt (sparc64-*-linux*): added gdbserver support.

       * regformats/reg-sparc64.dat: New file.

       * gdbserver/Makefile.in (SFILES,CLEAN): Added sparc64 files.
       (reg-sparc64.o,reg-sparc64.c): New.

       * gdbserver/configure.srv (sparc*-*-linux*): New configuration.

       * gdbserver/linux-low.c (regsets_fetch_inferior_registers): 
ptrace syscall args.
       (regsets_store_inferior_registers): Likewise.

       * gdbserver/linux-sparc-low.c: New file.


-- 
Daniel Gutson