if err := os.WriteFile(tmpFile, buf.Bytes(), 0644); err != nil {
		t.Fatalf("Failed to write assembly file: %v", err)
	}

	if err := os.WriteFile(filepath.Join(tmpDir, "go.mod"), []byte("module riscvtramp"), 0644); err != nil {
		t.Fatalf("Failed to write file: %v\n", err)
	}
	main := `package main
func main() {
	d()
}

func d()
`