elf/nextmod1.c

   1 #include <dlfcn.h>
   2
   3 extern int successful_rtld_next_test (void);
   4 extern void *failing_rtld_next_use (void);
   5
   6 int nextmod1_dummy_var;
   7
   8 int
   9 successful_rtld_next_test (void)
  10 {
  11   int (*fp) (void);
  12
  13   /* Get the next function... */
  14   fp = (int (*) (void)) dlsym (RTLD_NEXT, __FUNCTION__);
  15
  16   /* ...and simply call it.  */
  17   return fp ();
  18 }
  19
  20
  21 void *
  22 failing_rtld_next_use (void)
  23 {
  24   void *ret = dlsym (RTLD_NEXT, __FUNCTION__);
  25
  26   /* Ensure we are not tail call optimized, because then RTLD_NEXT
  27      might return this function.  */
  28   ++nextmod1_dummy_var;
  29   return ret;
  30 }