flowchart TB
    subgraph entry.S
        _entry[_entry]
    end
    subgraph link_app.S
        _app_num[_app_num]
    end
    subgraph main.c
        main[main]
    end
    subgraph loader.c
        loader_init[loader_init]
        run_next_app[run_next_app]
        load_app[load_app]
    end

    _entry --> main
    main --> loader_init
    main --> run_next_app
    run_next_app --> load_app
    loader_init --> _app_num