1 files changed, 82 insertions, 0 deletions
diff --git a/src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/test/tst/i386/ustack/tst.helper.c b/src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/test/tst/i386/ustack/tst.helper.c
new file mode 100644
index 00000000..69ab6a85
--- /dev/null
+++ b/src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/test/tst/i386/ustack/tst.helper.c
@@ -0,0 +1,82 @@
+/*
+ * 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.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <strings.h>
+
+int
+baz(void)
+{
+	return (8);
+}
+
+static int
+foo(void)
+{
+	/*
+	 * In order to assure that our helper is properly employed to identify
+	 * the frame, we're going to trampoline through data.
+	 */
+	uint8_t instr[] = {
+	    0x55,			/* pushl %ebp		*/
+	    0x8b, 0xec,			/* movl  %esp, %ebp	*/
+	    0xe8, 0x0, 0x0, 0x0, 0x0,	/* call  baz		*/
+	    0x8b, 0xe5,			/* movl  %ebp, %esp	*/
+	    0x5d,			/* popl  %ebp		*/
+	    0xc3			/* ret			*/
+	};
+	uint8_t *fp = malloc(sizeof (instr));
+
+	/*
+	 * Do our little relocation dance.
+	 */
+	*((int *)&instr[4]) = (uintptr_t)baz - (uintptr_t)&fp[8];
+
+	/*
+	 * Copy the code to the heap (it's a pain to build in ON with an
+	 * executable stack).
+	 */
+	bcopy(instr, fp, sizeof (instr));
+
+	(*(int (*)(void))fp)();
+
+	free(fp);
+
+	return (0);
+}
+
+int
+main(int argc, char **argv)
+{
+	for (;;) {
+		foo();
+	}
+
+	return (0);
+}