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 global = -1;
  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 }