3 files changed, 35 insertions, 22 deletions
diff --git a/src/cmd/link/testdata/linkname/coro2.go b/src/cmd/link/testdata/linkname/coro2.go
new file mode 100644
index 0000000000..ae47147670
--- /dev/null
+++ b/src/cmd/link/testdata/linkname/coro2.go
@@ -0,0 +1,17 @@
+// Copyright 2024 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.
+
+// Linkname corostart is not allowed, as it doesn't have
+// a linknamed definition.
+
+package main
+
+import _ "unsafe"
+
+//go:linkname corostart runtime.corostart
+func corostart()
+
+func main() {
+	corostart()
+}
diff --git a/src/cmd/link/testdata/linkname/fastrand.go b/src/cmd/link/testdata/linkname/fastrand.go
new file mode 100644
index 0000000000..ce51e2a7f3
--- /dev/null
+++ b/src/cmd/link/testdata/linkname/fastrand.go
@@ -0,0 +1,18 @@
+// Copyright 2024 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.
+
+// Linkname fastrand is allowed _for now_, as it has a
+// linknamed definition, for legacy reason.
+// NOTE: this may not be allowed in the future. Don't do this!
+
+package main
+
+import _ "unsafe"
+
+//go:linkname fastrand runtime.fastrand
+func fastrand() uint32
+
+func main() {
+	println(fastrand())
+}
diff --git a/src/cmd/link/testdata/linkname/weak.go b/src/cmd/link/testdata/linkname/weak.go
deleted file mode 100644
index 2bf0fbcbab..0000000000
--- a/src/cmd/link/testdata/linkname/weak.go
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2024 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.
-
-// Linkname generic functions in internal/weak is not
-// allowed; legitimate instantiation is ok.
-
-package main
-
-import (
-	"unique"
-	"unsafe"
-)
-
-//go:linkname weakMake internal/weak.Make[string]
-func weakMake(string) unsafe.Pointer
-
-func main() {
-	h := unique.Make("xxx")
-	println(h.Value())
-	weakMake("xxx")
-}