2006-05-31  Michael Snyder  <msnyder@redhat.com>

	* mips-tdep.c (mips_gdbarch_init): EABI64, addr_bit is 32.
	(mips_write_pc): Difference between addr_bit and ptr_bit
	requires sign_extension when setting $pc.
	
Index: mips-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/mips-tdep.c,v
retrieving revision 1.393
diff -p -r1.393 mips-tdep.c
*** mips-tdep.c	31 May 2006 23:15:50 -0000	1.393
--- mips-tdep.c	31 May 2006 23:18:47 -0000
*************** mips_unwind_dummy_id (struct gdbarch *gd
*** 838,843 ****
--- 838,847 ----
  static void
  mips_write_pc (CORE_ADDR pc, ptid_t ptid)
  {
+   /* If addr_bit is 32, force sign extension.  */
+   if (gdbarch_addr_bit (current_gdbarch) == 32)
+     if ((pc & 0xffffffff80000000LL) == 0x80000000)
+       pc |= 0xffffffff00000000LL;
    write_register_pid (mips_regnum (current_gdbarch)->pc, pc, ptid);
  }
  
*************** mips_gdbarch_init (struct gdbarch_info i
*** 4976,4981 ****
--- 4980,4986 ----
        tdep->default_mask_address_p = 0;
        set_gdbarch_long_bit (gdbarch, 64);
        set_gdbarch_ptr_bit (gdbarch, 64);
+       set_gdbarch_addr_bit (gdbarch, 32);
        set_gdbarch_long_long_bit (gdbarch, 64);
        break;
      case MIPS_ABI_N32: