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 __attribute__ ((noinline)) foo_hidden (void);
      11  
      12  int ret_foo;
      13  int ret_foo_hidden;
      14  int ret_foo_protected;
      15  
      16  extern int foo (void);
      17  extern int foo_protected (void);
      18  
      19  #ifndef FOO_P
      20  typedef int (*foo_p) (void);
      21  #endif
      22  
      23  foo_p foo_ptr = foo;
      24  foo_p foo_procted_ptr = foo_protected;
      25  
      26  extern foo_p get_foo_p (void);
      27  extern foo_p get_foo_hidden_p (void);
      28  extern foo_p get_foo_protected_p (void);
      29  
      30  int
      31  __attribute__ ((noinline))
      32  foo (void)
      33  {
      34    return -30;
      35  }
      36  
      37  int
      38  __attribute__ ((noinline))
      39  foo_hidden (void)
      40  {
      41    return -20;
      42  }
      43  
      44  int
      45  __attribute__ ((noinline))
      46  foo_protected (void)
      47  {
      48    return -40;
      49  }
      50  
      51  int
      52  main (void)
      53  {
      54    foo_p p;
      55    
      56    if (foo_ptr != foo)
      57      abort ();
      58    if ((*foo_ptr) () != -30)
      59      abort ();
      60  
      61    if (foo_procted_ptr != foo_protected)
      62      abort ();
      63    if ((*foo_procted_ptr) () != -40)
      64      abort ();
      65  
      66    p = get_foo_p ();
      67    if (p != foo)
      68      abort ();
      69    if (foo () != -30)
      70      abort ();
      71    if (ret_foo != -30 || (*p) () != ret_foo)
      72      abort ();
      73  
      74    p = get_foo_hidden_p ();
      75    if (foo_hidden () != -20)
      76      abort ();
      77    if (ret_foo_hidden != 1 || (*p) () != ret_foo_hidden)
      78      abort ();
      79  
      80    p = get_foo_protected_p ();
      81    if (p == foo_protected)
      82      abort ();
      83    if (foo_protected () != -40)
      84      abort ();
      85    if (ret_foo_protected != 0 || (*p) () != ret_foo_protected)
      86      abort ();
      87  
      88    return 0;
      89  }