glibc/elf/ifuncmain1vis.c

/* Test STT_GNU_IFUNC symbols:

   1. Direct function call.
   2. Function pointer.
   3. Visibility with override.
 */

#include <stdlib.h>

int ret_foo;
int ret_foo_hidden;
int ret_foo_protected;

extern int foo (void);
extern int foo_protected (void);

#ifndef FOO_P
typedef int (*foo_p) (void);
#endif

foo_p foo_ptr = foo;
foo_p foo_procted_ptr = foo_protected;

extern foo_p get_foo_p (void);
extern foo_p get_foo_hidden_p (void);
extern foo_p get_foo_protected_p (void);

int
__attribute__ ((noinline))
foo (void)
{
  return -30;
}

int
__attribute__ ((noinline))
foo_hidden (void)
{
  return -20;
}

int
__attribute__ ((noinline))
foo_protected (void)
{
  return -40;
}

int
main (void)
{
  foo_p p;

  if (foo_ptr != foo)
    abort ();
  if ((*foo_ptr) () != -30)
    abort ();

  if (foo_procted_ptr != foo_protected)
    abort ();
  if ((*foo_procted_ptr) () != -40)
    abort ();

  p = get_foo_p ();
  if (p != foo)
    abort ();
  if (foo () != -30)
    abort ();
  if (ret_foo != -30 || (*p) () != ret_foo)
    abort ();

  p = get_foo_hidden_p ();
  if (foo_hidden () != -20)
    abort ();
  if (ret_foo_hidden != 1 || (*p) () != ret_foo_hidden)
    abort ();

  p = get_foo_protected_p ();
  if (p == foo_protected)
    abort ();
  if (foo_protected () != -40)
    abort ();
  if (ret_foo_protected != 0 || (*p) () != ret_foo_protected)
    abort ();

  return 0;
}