SECTIONS {
  . = ALIGN(8);

  .myextra : {
    /* section information for finsh shell */
    . = ALIGN(8);
    __fsymtab_start = .;
    KEEP(*(FSymTab))
    __fsymtab_end = .;
    . = ALIGN(8);
    __vsymtab_start = .;
    KEEP(*(VSymTab))
    __vsymtab_end = .;
    . = ALIGN(8);

    /* section information for initial. */
    . = ALIGN(8);
    __rt_init_start = .;
    KEEP(*(SORT(.rti_fn*)))
    __rt_init_end = .;
    . = ALIGN(8);

    __rt_utest_tc_tab_start = .;
    KEEP(*(UtestTcTab))
    __rt_utest_tc_tab_end = .;
  }
  end = .;
  _end = .;
  _heap_start = ALIGN(0x1000);
}