title: using brk to get brk_start
body: <p>Manual for int brk(void *end_data_segment); says: "brk()  sets  the end  of  the  data  segment to the value specified by end_data_segment" </p>
  
  <p>On Success it returns 0 else -1.</p>
  
  <p>But how to I get the init value of my break (like sbrk(0))?</p>
  
  <p>best regards,</p>