--- a/src/cmd/cgo/out.go	2021-01-04 13:34:06 +0100
+++ b/src/cmd/cgo/out.go	2021-01-04 13:36:45 +0100
@@ -875,7 +875,7 @@
 	fmt.Fprintf(fgcc, "#pragma GCC diagnostic ignored \"-Wpragmas\"\n")
 	fmt.Fprintf(fgcc, "#pragma GCC diagnostic ignored \"-Waddress-of-packed-member\"\n")
 
-	fmt.Fprintf(fgcc, "extern void crosscall2(void (*fn)(void *), void *, int, __SIZE_TYPE__);\n")
+	fmt.Fprintf(fgcc, "extern void __attribute__((longcall)) crosscall2(void (*fn)(void *), void *, int, __SIZE_TYPE__);\n")
 	fmt.Fprintf(fgcc, "extern __SIZE_TYPE__ _cgo_wait_runtime_init_done(void);\n")
 	fmt.Fprintf(fgcc, "extern void _cgo_release_context(__SIZE_TYPE__);\n\n")
 	fmt.Fprintf(fgcc, "extern char* _cgo_topofstack(void);")