at 2013/2/27 2:08, Pedro Alves written:
> You mention the 'pc' as a pseudo register.  At the
> hardware/kernel level, on tilegx32, is 'pc' 32-bit or 64-bit?
> I thought Tile-GX was always 64-bit, and tilegx32 was just an ABI.
       thanks for review these.

       yes, exactly, TileGX is always 64bit.  On tilegx32, at 
hardware/kernel level, 'pc' is 64bit.
> Is the kernel already trimming the PC?
      No trimming, the kernel always return 64bit.

      below is the updated ChangeLog, and patch.

      please review. thanks.

      gdb/

        * regformats/reg-tilegx.dat (name): Change abi name to "tilegx".
        * regformats/reg-tilegx32.dat: New.

      gdb/gdbserver/

         * Makefile.in (clean): Remove reg-tilegx.c, reg-tilegx32.c.
         (reg-tilegx32.c): New rule.
         * configure.srv (tilegx-*-linux*): Add reg-tilegx32.o to 
srv_regobj.
         * linux-tile-low.c (tile_arch_steup): New function.  Invoke
         different register info initializer according to elf class.
         (init_registers_tilgx32): New function.  The tilegx32 register info
         initializer.
         (tile_fill_gregset): Use "uint_reg_t" to represent register size.
         (tile_store_gregset): Likewise.