misc/cgo/test/issue9400: fix to build with gccgo

This doesn't test much with gccgo, but at least it builds now, and the
test does, unsurprisingly, pass.  A proper test would require adding
assembly files in GCC syntax for all platforms that gccgo supports,
which would be infeasible.

Also added copyright headers to the asm files.

Change-Id: Icea5af29d7d521a0681506ddb617a79705b76d33
Reviewed-on: https://go-review.googlesource.com/9417
Reviewed-by: Minux Ma <minux@golang.org>

6 files changed, 52 insertions, 0 deletions

diff --git a/misc/cgo/test/issue9400/asm_386.s b/misc/cgo/test/issue9400/asm_386.s
index b277fa1c1b..e37a54f2af 100644
--- a/misc/cgo/test/issue9400/asm_386.s
+++ b/misc/cgo/test/issue9400/asm_386.s
@@ -1,3 +1,9 @@
+// Copyright 2014 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 !gccgo
+
 #include "textflag.h"
 
 TEXT ·RewindAndSetgid(SB),NOSPLIT,$0-0
diff --git a/misc/cgo/test/issue9400/asm_amd64x.s b/misc/cgo/test/issue9400/asm_amd64x.s
index 2c97e1375d..f09e95d4cf 100644
--- a/misc/cgo/test/issue9400/asm_amd64x.s
+++ b/misc/cgo/test/issue9400/asm_amd64x.s
@@ -1,4 +1,9 @@
+// Copyright 2014 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 amd64 amd64p32
+// +build !gccgo
 
 #include "textflag.h"
 
diff --git a/misc/cgo/test/issue9400/asm_arm.s b/misc/cgo/test/issue9400/asm_arm.s
index d9d2abc2d4..5c5983d4c2 100644
--- a/misc/cgo/test/issue9400/asm_arm.s
+++ b/misc/cgo/test/issue9400/asm_arm.s
@@ -1,3 +1,9 @@
+// Copyright 2014 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 !gccgo
+
 #include "textflag.h"
 
 TEXT cas<>(SB),NOSPLIT,$0
diff --git a/misc/cgo/test/issue9400/asm_arm64.s b/misc/cgo/test/issue9400/asm_arm64.s
index 0c024e8333..cba525f4c0 100644
--- a/misc/cgo/test/issue9400/asm_arm64.s
+++ b/misc/cgo/test/issue9400/asm_arm64.s
@@ -1,3 +1,9 @@
+// Copyright 2014 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 !gccgo
+
 #include "textflag.h"
 
 TEXT ·RewindAndSetgid(SB),NOSPLIT,$-8-0
diff --git a/misc/cgo/test/issue9400/asm_ppc64x.s b/misc/cgo/test/issue9400/asm_ppc64x.s
index 0aaa10cdd0..7dfe37e7c6 100644
--- a/misc/cgo/test/issue9400/asm_ppc64x.s
+++ b/misc/cgo/test/issue9400/asm_ppc64x.s
@@ -1,4 +1,9 @@
+// Copyright 2014 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 ppc64 ppc64le
+// +build !gccgo
 
 #include "textflag.h"
 
diff --git a/misc/cgo/test/issue9400/gccgo.go b/misc/cgo/test/issue9400/gccgo.go
new file mode 100644
index 0000000000..6b9d5fa3a7
--- /dev/null
+++ b/misc/cgo/test/issue9400/gccgo.go
@@ -0,0 +1,24 @@
+// Copyright 2014 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 gccgo
+
+package issue9400
+
+import (
+	"runtime"
+	"sync/atomic"
+)
+
+// The test for the gc compiler resets the stack pointer so that the
+// stack gets modified.  We don't have a way to do that for gccgo
+// without writing more assembly code, which we haven't bothered to
+// do.  So this is not much of a test.
+
+func RewindAndSetgid() {
+	atomic.StoreInt32(&Baton, 1)
+	for atomic.LoadInt32(&Baton) != 0 {
+		runtime.Gosched()
+	}
+}