Index: src/runtime/stubs_riscv64.go
--- src/runtime/stubs_riscv64.go.orig
+++ src/runtime/stubs_riscv64.go
@@ -4,9 +4,14 @@
 
 package runtime
 
+import "unsafe"
+
 // Called from assembly only; declared for go vet.
 func load_g()
 func save_g()
+
+//go:noescape
+func asmcgocall_no_g(fn, arg unsafe.Pointer)
 
 // Used by reflectcall and the reflect package.
 //