elf/ifuncmain1.c

   1 /* Test STT_GNU_IFUNC symbols:
   2
   3    1. Direct function call.
   4    2. Function pointer.
   5    3. Visibility without 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
  23 /* Address-significant access to protected symbols is not supported in
  24    position-dependent mode on several architectures because GCC
  25    generates relocations that assume that the address is local to the
  26    main program.  */
  27 #ifdef __PIE__
  28 foo_p foo_procted_ptr = foo_protected;
  29 #endif
  30
  31 extern foo_p get_foo_p (void);
  32 extern foo_p get_foo_hidden_p (void);
  33 extern foo_p get_foo_protected_p (void);
  34
  35 int
  36 main (void)
  37 {
  38   foo_p p;
  39
  40   if (foo_ptr != foo)
  41     abort ();
  42   if (foo () != -1)
  43     abort ();
  44   if ((*foo_ptr) () != -1)
  45     abort ();
  46
  47 #ifdef __PIE__
  48   if (foo_procted_ptr != foo_protected)
  49     abort ();
  50 #endif
  51   if (foo_protected () != 0)
  52     abort ();
  53 #ifdef __PIE__
  54   if ((*foo_procted_ptr) () != 0)
  55     abort ();
  56 #endif
  57
  58   p = get_foo_p ();
  59   if (p != foo)
  60     abort ();
  61   if (ret_foo != -1 || (*p) () != ret_foo)
  62     abort ();
  63
  64   p = get_foo_hidden_p ();
  65   if (ret_foo_hidden != 1 || (*p) () != ret_foo_hidden)
  66     abort ();
  67
  68   p = get_foo_protected_p ();
  69 #ifdef __PIE__
  70   if (p != foo_protected)
  71     abort ();
  72 #endif
  73   if (ret_foo_protected != 0 || (*p) () != ret_foo_protected)
  74     abort ();
  75
  76   return 0;
  77 }