Introduce basic LWP accessors

[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 0f6568a4eb75ddbae8e3fbce4beb37fe0eae83a6..78da162f153a0583d3ff053c68bbe43bfba1432f 100644 (file)
--- a/gdb/gdbserver/linux-ia64-low.c
+++ b/gdb/gdbserver/linux-ia64-low.c
@@ -1,6 +1,5 @@
 /* GNU/Linux/IA64 specific low level interface, for the remote server for GDB.
-   Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2007, 2008, 2009,
-   2010, 2011 Free Software Foundation, Inc.
+   Copyright (C) 1995-2015 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -26,6 +25,7 @@
 
 /* Defined in auto-generated file reg-ia64.c.  */
 void init_registers_ia64 (void);
+extern const struct target_desc *tdesc_ia64;
 
 #define ia64_num_regs 462
 
@@ -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,
@@ -278,10 +278,83 @@ 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 (regcache->tdesc, 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 (regcache->tdesc, 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 (regcache->tdesc, regnum));
+      supply_register (regcache, regnum, f_one);
+      return 1;
+    }
+
+  return 0;
+}
+
+static struct usrregs_info ia64_usrregs_info =
+  {
+    ia64_num_regs,
+    ia64_regmap,
+  };
+
+static struct regs_info regs_info =
+  {
+    NULL, /* regset_bitmap */
+    &ia64_usrregs_info
+  };
+
+static const struct regs_info *
+ia64_regs_info (void)
+{
+  return &regs_info;
+}
+
+static void
+ia64_arch_setup (void)
+{
+  current_process ()->tdesc = tdesc_ia64;
+}
+
+
 struct linux_target_ops the_low_target = {
-  init_registers_ia64,
-  ia64_num_regs,
-  ia64_regmap,
+  ia64_arch_setup,
+  ia64_regs_info,
   ia64_cannot_fetch_register,
   ia64_cannot_store_register,
+  ia64_fetch_register,
 };
+
+void
+initialize_low_arch (void)
+{
+  init_registers_ia64 ();
+}