elf/constload2.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4
   5 extern int bar (void);
   6 extern int baz (void);
   7 extern int foo (void);
   8 extern void __attribute__ ((__constructor__)) init (void);
   9
  10 void *h;
  11
  12 int
  13 foo (void)
  14 {
  15   return 42 + bar ();
  16 }
  17
  18 int
  19 baz (void)
  20 {
  21   return -21;
  22 }
  23
  24
  25 void
  26 __attribute__ ((__constructor__))
  27 init (void)
  28 {
  29   h = dlopen ("constload3.so", RTLD_GLOBAL | RTLD_LAZY);
  30   if (h == NULL)
  31     {
  32       puts ("failed to load constload3");
  33       exit (1);
  34     }
  35   else
  36     puts ("succeeded loading constload3");
  37 }
  38
  39 static void
  40 __attribute__ ((__destructor__))
  41 fini (void)
  42 {
  43   if (dlclose (h) != 0)
  44     {
  45       puts ("failed to unload constload3");
  46       exit (1);
  47     }
  48   else
  49     puts ("succeeded unloading constload3");
  50 }