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diff --git a/usr/src/lib/libsaveargs/common/saveargs.h b/usr/src/lib/libsaveargs/common/saveargs.h
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+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SAVEARGS_H
+#define _SAVEARGS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <sys/types.h>
+
+/*
+ * The longest instruction sequence in bytes before all 6 arguments are
+ * saved on the stack. This value depends on compiler implementation,
+ * therefore it should be examined periodically to guarantee accuracy.
+ */
+#define SAVEARGS_INSN_SEQ_LEN 256
+
+#define SAVEARGS_NO_ARGS 0 /* no saved arguments */
+#define SAVEARGS_TRAD_ARGS 1 /* traditionally located arguments */
+#define SAVEARGS_STRUCT_ARGS 2 /* struct return addr pushed as arg0 */
+
+int saveargs_has_args(uint8_t *, size_t, uint_t, int);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SAVEARGS_H */