Hi,
 I would like a review of the following changes that I would like to
eventually submit as patch. The changes add support for debugging v8plus
 binaries on solaris. Below is a description, please pardon the format
this is my first gdb contribution.

 Problem : Out and Global registers in v8plus are 64 bits, but v8plus
           follows the 32 bit abi.
           /proc provides /proc/<proc-id>/lwp/<lwp-id>/xregs for storing
           the upper 32 bits of these registers (and other extra
           register state info that dont fit in the 32 bit abi).

Fix     : * gdb should treat out/global registers as 64 bits for
             v8plus binaries, while respecting the abi requirements that
             only the low 32 bits are used at abi points.

           * gdb should also read/write xregs as needed.


Feature : Users will be able to view correct values of out/global
          registers when debugging v8plus binaries.
          Note that only v8plus built gdb and above will be able to
          debug v8plus binaries.

Testing : No regressions gdb-6.4 testsuite for v8plus and v9 gdb.
          Testing done with gcc 4.0.2, solaris 2.9.

Thanks

tunji