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-rw-r--r--tools/testing/selftests/arm64/bti/trampoline.S29
1 files changed, 29 insertions, 0 deletions
diff --git a/tools/testing/selftests/arm64/bti/trampoline.S b/tools/testing/selftests/arm64/bti/trampoline.S
new file mode 100644
index 000000000..09beb3f36
--- /dev/null
+++ b/tools/testing/selftests/arm64/bti/trampoline.S
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2019 Arm Limited
+ * Original author: Dave Martin <Dave.Martin@arm.com>
+ */
+
+#include "assembler.h"
+
+startfn call_using_br_x0
+ bti c
+ br x0
+endfn
+
+startfn call_using_br_x16
+ bti c
+ mov x16, x0
+ br x16
+endfn
+
+startfn call_using_blr
+ paciasp
+ stp x29, x30, [sp, #-16]!
+ blr x0
+ ldp x29, x30, [sp], #16
+ autiasp
+ ret
+endfn
+
+emit_aarch64_feature_1_and