reflect: add support for GOARCH=arm64

Change-Id: I033eecff5e5838ba677378ac884bf5f29267e880
Reviewed-on: https://go-review.googlesource.com/7146Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

src/reflect/asm_arm64.s

+// Copyright 2012 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.
+
+#include "textflag.h"
+#include "funcdata.h"
+
+// makeFuncStub is the code half of the function returned by MakeFunc.
+// See the comment on the declaration of makeFuncStub in makefunc.go
+// for more details.
+// No arg size here, runtime pulls arg map out of the func value.
+TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$16
+	NO_LOCAL_POINTERS
+	MOVD	R26, 8(RSP)
+	MOVD	$argframe+0(FP), R3
+	MOVD	R3, 16(RSP)
+	BL	·callReflect(SB)
+	RET
+
+// methodValueCall is the code half of the function returned by makeMethodValue.
+// See the comment on the declaration of methodValueCall in makefunc.go
+// for more details.
+// No arg size here; runtime pulls arg map out of the func value.
+TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$16
+	NO_LOCAL_POINTERS
+	MOVD	R26, 8(RSP)
+	MOVD	$argframe+0(FP), R3
+	MOVD	R3, 16(RSP)
+	BL	·callMethod(SB)
+	RET