Merge GDB 7.5.1

gdb/gdbserver/linux-ia64-low.c

 /* GNU/Linux/IA64 specific low level interface, for the remote server for GDB.
    Copyright (C) 1995-1996, 1998-2002, 2007-2012 Free Software
    Foundation, Inc.
 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
@@ skipping 238 matching lines @@
     -1, -1, -1,
     PT_AR_UNAT,
     -1, -1, -1,
     PT_AR_FPSR,
     -1, -1, -1,
     -1,         /* Not available: ITC */
     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
     -1, -1, -1, -1, -1, -1, -1, -1, -1,
     PT_AR_PFS,
     PT_AR_LC,
-    -1,         /* Not available: EC, the Epilog Count register */
+    PT_AR_EC,
     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
     -1,
   };
 
 static int
 ia64_cannot_store_register (int regno)
 {
   return 0;
 }
 
 static int
 ia64_cannot_fetch_register (int regno)
 {
   return 0;
 }
 
+/* GDB register numbers.  */
+#define IA64_GR0_REGNUM         0
+#define IA64_FR0_REGNUM         128
+#define IA64_FR1_REGNUM         129
+
+static int
+ia64_fetch_register (struct regcache *regcache, int regnum)
+{
+  /* r0 cannot be fetched but is always zero.  */
+  if (regnum == IA64_GR0_REGNUM)
+    {
+      const gdb_byte zero[8] = { 0 };
+
+      gdb_assert (sizeof (zero) == register_size (regnum));
+      supply_register (regcache, regnum, zero);
+      return 1;
+    }
+
+  /* fr0 cannot be fetched but is always zero.  */
+  if (regnum == IA64_FR0_REGNUM)
+    {
+      const gdb_byte f_zero[16] = { 0 };
+
+      gdb_assert (sizeof (f_zero) == register_size (regnum));
+      supply_register (regcache, regnum, f_zero);
+      return 1;
+    }
+
+  /* fr1 cannot be fetched but is always one (1.0).  */
+  if (regnum == IA64_FR1_REGNUM)
+    {
+      const gdb_byte f_one[16] =
+        { 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0xff, 0, 0, 0, 0, 0, 0 };
+
+      gdb_assert (sizeof (f_one) == register_size (regnum));
+      supply_register (regcache, regnum, f_one);
+      return 1;
+    }
+
+  return 0;
+}
+
 struct linux_target_ops the_low_target = {
   init_registers_ia64,
   ia64_num_regs,
   ia64_regmap,
+  NULL,
   ia64_cannot_fetch_register,
   ia64_cannot_store_register,
+  ia64_fetch_register,
 };