elf/ifuncmain1vis.c

   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 }