toolchain/gcc/libgloss/libnosys/sbrk.c

   1 /* Version of sbrk for no operating system.  */
   2
   3 void *
   4 _sbrk (incr)
   5      int incr;
   6 {
   7    extern char   end; /* Set by linker.  */
   8    static char * heap_end;
   9    char *        prev_heap_end;
  10
  11    if (heap_end == 0)
  12      heap_end = & end;
  13
  14    prev_heap_end = heap_end;
  15    heap_end += incr;
  16
  17    return (void *) prev_heap_end;
  18 }