1  #include <unistd.h>
       2  
       3  /* Give init non-default priority so that it runs before init_array.  */
       4  static void init (void) __attribute__ ((constructor (1000)));
       5  
       6  static void
       7  init (void)
       8  {
       9    write (STDOUT_FILENO, "DSO init\n", 9);
      10  }
      11  
      12  /* Give fini the same priority as init.  */
      13  static void fini (void) __attribute__ ((destructor (1000)));
      14  
      15  static void
      16  fini (void)
      17  {
      18    write (STDOUT_FILENO, "DSO fini\n", 9);
      19  }
      20  
      21  static void
      22  init_0 (void)
      23  {
      24    write (STDOUT_FILENO, "DSO init array 0\n", 17);
      25  }
      26  
      27  static void
      28  init_1 (void)
      29  {
      30    write (STDOUT_FILENO, "DSO init array 1\n", 17);
      31  }
      32  
      33  static void
      34  init_2 (void)
      35  {
      36    write (STDOUT_FILENO, "DSO init array 2\n", 17);
      37  }
      38  
      39  void (*init_array []) (void)
      40       __attribute__ ((section (".init_array"), aligned (sizeof (void *)))) =
      41  {
      42    &init_0,
      43    &init_1,
      44    &init_2
      45  };
      46  
      47  static void
      48  fini_0 (void)
      49  {
      50    write (STDOUT_FILENO, "DSO fini array 0\n", 17);
      51  }
      52  
      53  static void
      54  fini_1 (void)
      55  {
      56    write (STDOUT_FILENO, "DSO fini array 1\n", 17);
      57  }
      58  
      59  static void
      60  fini_2 (void)
      61  {
      62    write (STDOUT_FILENO, "DSO fini array 2\n", 17);
      63  }
      64  
      65  void (*fini_array []) (void)
      66       __attribute__ ((section (".fini_array"), aligned (sizeof (void *)))) =
      67  {
      68    &fini_0,
      69    &fini_1,
      70    &fini_2
      71  };