Index: src/cmd/link/internal/sym/reloc.go
--- src/cmd/link/internal/sym/reloc.go.orig
+++ src/cmd/link/internal/sym/reloc.go
@@ -67,6 +67,8 @@ func RelocName(arch *sys.Arch, r objabi.RelocType) str
 			return elf.R_PPC64(nr).String()
 		case sys.S390X:
 			return elf.R_390(nr).String()
+		case sys.RISCV64:
+			return elf.R_RISCV(nr).String()
 		default:
 			panic("unreachable")
 		}
