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-rw-r--r--cddl/contrib/opensolaris/cmd/dtrace/test/tst/sparc/ustack/tst.helper.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/cddl/contrib/opensolaris/cmd/dtrace/test/tst/sparc/ustack/tst.helper.c b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/sparc/ustack/tst.helper.c
new file mode 100644
index 000000000000..fa4802acd5d6
--- /dev/null
+++ b/cddl/contrib/opensolaris/cmd/dtrace/test/tst/sparc/ustack/tst.helper.c
@@ -0,0 +1,81 @@
+/*
+ * 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.
+ */
+ uint32_t instr[] = {
+ 0x9de3bfa0, /* save %sp, -0x60, %sp */
+ 0x40000000, /* call baz */
+ 0x01000000, /* nop */
+ 0x81c7e008, /* ret */
+ 0x81e80000 /* restore */
+ };
+ uint32_t *fp = malloc(sizeof (instr));
+
+ /*
+ * Do our little relocation dance.
+ */
+ instr[1] |= ((uintptr_t)baz - (uintptr_t)&fp[1]) >> 2;
+
+ /*
+ * 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);
+}