diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 0fb6602c32..0b3f886a3e 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2012-03-28  Joel Brobecker  <brobecker@adacore.com>
+
+	* ia64-linux-nat.c (ia64_linux_fetch_register): Add special
+	handling for r0.
+
 2012-03-27  Pedro Alves  <palves@redhat.com>
 
 	Eliminate struct ui_stream.
diff --git a/gdb/ia64-linux-nat.c b/gdb/ia64-linux-nat.c
index 19b827f84a..60b873be38 100644
--- a/gdb/ia64-linux-nat.c
+++ b/gdb/ia64-linux-nat.c
@@ -680,6 +680,16 @@ ia64_linux_fetch_register (struct regcache *regcache, int regnum)
   PTRACE_TYPE_RET *buf;
   int pid, i;
 
+  /* 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 (gdbarch, regnum));
+      regcache_raw_supply (regcache, regnum, zero);
+      return;
+    }
+
   if (ia64_cannot_fetch_register (gdbarch, regnum))
     {
       regcache_raw_supply (regcache, regnum, NULL);