misc/cgo/test: add mipsx test case for #9400

Change-Id: I7d0bc5093943b0744d865e91517ff6292f3b2f89
Reviewed-on: https://go-review.googlesource.com/34510
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

diff --git a/misc/cgo/test/issue9400/asm_mipsx.s b/misc/cgo/test/issue9400/asm_mipsx.s
new file mode 100644 (file)
index 0000000..ddf33e9
--- /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