[patch] msp430: make cio interface more flexible

[DJ Delorie]

This give us two hooks, one with extra underscores, to avoid
mismatched underscore issues with various third-party tools.
Committed.

	* msp430/cio.c: Remove, replace with...
	* msp430/cio.S: New, this.

diff --git a/libgloss/msp430/cio.S b/libgloss/msp430/cio.S
new file mode 100644
index 0000000..e7a268d
--- /dev/null
+++ b/libgloss/msp430/cio.S
@@ -0,0 +1,33 @@
+/*
+
+Copyright (c) 2014  Red Hat, Inc. All rights reserved.
+
+This copyrighted material is made available to anyone wishing to use, modify,
+copy, or redistribute it subject to the terms and conditions of the BSD
+License.   This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY expressed or implied, including the implied warranties
+of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  A copy of this license
+is available at http://www.opensource.org/licenses. Any Red Hat trademarks that
+are incorporated in the source code or documentation are not subject to the BSD
+License and may only be used or replicated with the express permission of
+Red Hat, Inc.
+
+*/
+#include "memmodel.h"
+
+	.data
+
+	.global	__CIOBUF__
+__CIOBUF__:
+	.global	_CIOBUF_
+_CIOBUF_:
+	.space	75
+
+	.text
+
+	.global	_libgloss_cio_hook
+_libgloss_cio_hook:
+	.global C$$IO$$
+C$$IO$$:
+	nop
+        ret_
diff --git a/libgloss/msp430/cio.c b/libgloss/msp430/cio.c
deleted file mode 100644
index d5e3e74..0000000
--- a/libgloss/msp430/cio.c
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
-
-Copyright (c) 2013  Red Hat, Inc. All rights reserved.
-
-This copyrighted material is made available to anyone wishing to use, modify,
-copy, or redistribute it subject to the terms and conditions of the BSD
-License.   This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY expressed or implied, including the implied warranties
-of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  A copy of this license
-is available at http://www.opensource.org/licenses. Any Red Hat trademarks that
-are incorporated in the source code or documentation are not subject to the BSD
-License and may only be used or replicated with the express permission of
-Red Hat, Inc.
-
-*/
-
-#include "cio.h"
-
-__CIOBUF__TYPE__ __CIOBUF__;
-
-void
-_libgloss_cio_hook (void)
-{
-  __asm__ __volatile__ (" .global C$$IO$$");
-  __asm__ __volatile__ ("C$$IO$$: nop");
-}