elf/ifuncmain5.c

   1 /* Test STT_GNU_IFUNC symbols with dynamic function pointer only.  */
   2
   3 #include <stdlib.h>
   4
   5 extern int foo (void);
   6 extern int foo_protected (void);
   7
   8 typedef int (*foo_p) (void);
   9
  10 foo_p
  11 __attribute__ ((noinline))
  12 get_foo (void)
  13 {
  14   return foo;
  15 }
  16
  17
  18 /* Address-significant access to protected symbols is not supported in
  19    position-dependent mode on several architectures because GCC
  20    generates relocations that assume that the address is local to the
  21    main program.  */
  22 #ifdef __PIE__
  23 foo_p
  24 __attribute__ ((noinline))
  25 get_foo_protected (void)
  26 {
  27   return foo_protected;
  28 }
  29 #endif
  30
  31 int
  32 main (void)
  33 {
  34   foo_p p;
  35
  36   p = get_foo ();
  37   if ((*p) () != -1)
  38     abort ();
  39
  40 #ifdef __PIE__
  41   p = get_foo_protected ();
  42   if ((*p) () != 0)
  43     abort ();
  44 #endif
  45
  46   return 0;
  47 }