misc/cgo/test/issue9400/asm_mipsx.s | 31 +++++++++++++++++++++++++++++++

diff --git a/misc/cgo/test/issue9400/asm_mipsx.s b/misc/cgo/test/issue9400/asm_mipsx.s
new file mode 100644
index 0000000000000000000000000000000000000000..ddf33e9f8e570553b88746d3759c4f0eeed35908
--- /dev/null
+++ b/misc/cgo/test/issue9400/asm_mipsx.s
@@ -0,0 +1,31 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build mips mipsle
+// +build !gccgo
+
+#include "textflag.h"
+
+TEXT ·RewindAndSetgid(SB),NOSPLIT,$-4-0
+	// Rewind stack pointer so anything that happens on the stack
+	// will clobber the test pattern created by the caller
+	ADDU	$(1024*8), R29
+
+	// Ask signaller to setgid
+	MOVW	$1, R1
+	SYNC
+	MOVW	R1, ·Baton(SB)
+	SYNC
+
+	// Wait for setgid completion
+loop:
+	SYNC
+	MOVW	·Baton(SB), R1
+	OR	R2, R2, R2	// hint that we're in a spin loop
+	BNE	R1, loop
+	SYNC
+
+	// Restore stack
+	ADDU	$(-1024*8), R29
+	RET