2012-03-28 Pedro Alves <palves@redhat.com>

[deliverable/binutils-gdb.git] / gdb / gdbserver / linux-ia64-low.c

diff --git a/gdb/gdbserver/linux-ia64-low.c b/gdb/gdbserver/linux-ia64-low.c
index 875319051adfe9622337eab9537d48ad8555f5ae..c8fa603ec7d226a4efbd7cef4c80d284610759ab 100644 (file)
--- a/gdb/gdbserver/linux-ia64-low.c
+++ b/gdb/gdbserver/linux-ia64-low.c
@@ -256,7 +256,7 @@ static int ia64_regmap[] =
     -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,
@@ -278,6 +278,48 @@ 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,
@@ -285,4 +327,5 @@ struct linux_target_ops the_low_target = {
   NULL,
   ia64_cannot_fetch_register,
   ia64_cannot_store_register,
+  ia64_fetch_register,
 };