elf/soinit.c

   1 /* Initializer module for building the ELF shared C library.  This file and
   2    sofini.c do the work normally done by crtbeginS.o and crtendS.o, to wrap
   3    the `.ctors' and `.dtors' sections so the lists are terminated, and
   4    calling those lists of functions.  */
   5
   6 static void (*const __CTOR_LIST__[1]) (void)
   7      __attribute__ ((section (".ctors")))
   8      = { (void (*) (void)) -1 };
   9 static void (*const __DTOR_LIST__[1]) (void)
  10      __attribute__ ((section (".dtors")))
  11      = { (void (*) (void)) -1 };
  12
  13 static inline void
  14 run_hooks (void (*const list[]) (void))
  15 {
  16   while (*++list)
  17     (**list) ();
  18 }
  19
  20
  21 /* This function will be called from _init in init-first.c.  */
  22 void
  23 __libc_global_ctors (void)
  24 {
  25   /* Call constructor functions.  */
  26   run_hooks (__CTOR_LIST__);
  27 }
  28
  29
  30 /* This function becomes the DT_FINI termination function
  31    for the C library.  */
  32 void _fini (void) __attribute__ ((section (".fini"))); /* Just for kicks.  */
  33 void
  34 _fini (void)
  35 {
  36   /* Call destructor functions.  */
  37   run_hooks (__DTOR_LIST__);
  38 }