text: int _write(int fd, const void *buf, int count) {
    return -1;
  }
  
  int _close(int fd) {
    return -1;
  }
  
  int _lseek(int fd, int offset, int whence) {
    return -1;
  }
  
  int _read(int fd, void *buf, int count) {
    return -1;
  }
  
  void *_sbrk(int increment) {
    return 0; //NULL;
  }
  
  void __aeabi_unwind_cpp_pr0(void)
  {
  }
  