1  /* Test STT_GNU_IFUNC symbols:
       2  
       3     1. Direct function call.
       4     2. Function pointer.
       5     3. Visibility with override.
       6   */
       7  
       8  #include <stdlib.h>
       9  
      10  int ret_foo;
      11  int ret_foo_hidden;
      12  int ret_foo_protected;
      13  
      14  extern int foo (void);
      15  extern int foo_protected (void);
      16  
      17  #ifndef FOO_P
      18  typedef int (*foo_p) (void);
      19  #endif
      20  
      21  foo_p foo_ptr = foo;
      22  foo_p foo_procted_ptr = foo_protected;
      23  
      24  extern foo_p get_foo_p (void);
      25  extern foo_p get_foo_hidden_p (void);
      26  extern foo_p get_foo_protected_p (void);
      27  
      28  int
      29  __attribute__ ((noinline))
      30  foo (void)
      31  {
      32    return -30;
      33  }
      34  
      35  int
      36  __attribute__ ((noinline))
      37  foo_hidden (void)
      38  {
      39    return -20;
      40  }
      41  
      42  int
      43  __attribute__ ((noinline))
      44  foo_protected (void)
      45  {
      46    return -40;
      47  }
      48  
      49  int
      50  main (void)
      51  {
      52    foo_p p;
      53  
      54    if (foo_ptr != foo)
      55      abort ();
      56    if ((*foo_ptr) () != -30)
      57      abort ();
      58  
      59    if (foo_procted_ptr != foo_protected)
      60      abort ();
      61    if ((*foo_procted_ptr) () != -40)
      62      abort ();
      63  
      64    p = get_foo_p ();
      65    if (p != foo)
      66      abort ();
      67    if (foo () != -30)
      68      abort ();
      69    if (ret_foo != -30 || (*p) () != ret_foo)
      70      abort ();
      71  
      72    p = get_foo_hidden_p ();
      73    if (foo_hidden () != -20)
      74      abort ();
      75    if (ret_foo_hidden != 1 || (*p) () != ret_foo_hidden)
      76      abort ();
      77  
      78    p = get_foo_protected_p ();
      79    if (p == foo_protected)
      80      abort ();
      81    if (foo_protected () != -40)
      82      abort ();
      83    if (ret_foo_protected != 0 || (*p) () != ret_foo_protected)
      84      abort ();
      85  
      86    return 0;
      87  }