struct link_map **new_global;
weak_extern (_dl_sysdep_start)/* This function is used to unload the cache file if necessary.  */extern void _dl_unload_cache (void);extern int __libc_multiple_libcs;	/* Defined in init-first.c.  */extern int __libc_argc;extern char **__libc_argv;extern char **__environ;static size_t _dl_global_scope_alloc;/* During the program run we must not modify the global data of   loaded shared object simultanously in two threads.  Therefore we   protect `_dl_open' and `_dl_close' in dl-close.c.   This must be a recursive lock since the initializer function of   the loaded object might as well require a call to this function.   At this time it is not anymore a problem to modify the tables.  */__libc_lock_define_initialized_recursive (, _dl_load_lock)/* We must be carefull not to leave us in an inconsistent state.  Thus we   catch any error and re-raise it after cleaning up.  */struct dl_open_args{  const char *file;  int mode;  struct link_map *map;};static voiddl_open_worker (void *a){  struct dl_open_args *args = a;  const char *file = args->file;  int mode = args->mode;  struct link_map *new, *l;  ElfW(Addr) init;  struct r_debug *r;  /* Load the named object.  */  args->map = new = _dl_map_object (NULL, file, 0, lt_loaded, 0);  if (new->l_searchlist.r_list)    /* It was already open.  */    return;  /* Load that object's dependencies.  */  _dl_map_object_deps (new, NULL, 0, 0);  /* So far, so good.  Now check the versions.  */  (void) _dl_check_all_versions (new, 0);  /* Relocate the objects loaded.  We do this in reverse order so that copy     relocs of earlier objects overwrite the data written by later objects.  */  l = new;  while (l->l_next)    l = l->l_next;  while (1)    {      if (! l->l_relocated)	{#ifdef PIC	  if (_dl_profile != NULL)	    {	      /* If this here is the shared object which we want to profile		 make sure the profile is started.  We can find out whether	         this is necessary or not by observing the `_dl_profile_map'	         variable.  If was NULL but is not NULL afterwars we must		 start the profiling.  */	      struct link_map *old_profile_map = _dl_profile_map;	      _dl_relocate_object (l, l->l_scope, 1, 1);	      if (old_profile_map == NULL && _dl_profile_map != NULL)		/* We must prepare the profiling.  */		_dl_start_profile (_dl_profile_map, _dl_profile_output);	    }	  else#endif	    _dl_relocate_object (l, l->l_scope,				 (mode & RTLD_BINDING_MASK) == RTLD_LAZY, 0);	}      if (l == new)	break;      l = l->l_prev;    }  new->l_global = (mode & RTLD_GLOBAL) ? 1 : 0;  if (new->l_global)    {      /* The symbols of the new object and its dependencies are to be	 introduced into the global scope that will be used to resolve	 references from other dynamically-loaded objects.	 The global scope is the searchlist in the main link map.  We	 extend this list if necessary.  There is one problem though:	 since this structure was allocated very early (before the libc	 is loaded) the memory it uses is allocated by the malloc()-stub	 in the ld.so.  When we come here these functions are not used	 anymore.  Instead the malloc() implementation of the libc is	 used.  But this means the block from the main map cannot be used	 in an realloc() call.  Therefore we allocate a completely new	 array the first time we have to add something to the locale scope.  */      if (_dl_global_scope_alloc == 0)	{	  /* This is the first dynamic object given global scope.  */	  struct link_map **new_global;	  _dl_global_scope_alloc = _dl_main_searchlist->r_nlist + 8;	  new_global = (struct link_map **)	    malloc (_dl_global_scope_alloc * sizeof (struct link_map *));	  if (new_global == NULL)	    {	      _dl_global_scope_alloc = 0;	    nomem:	      new->l_global = 0;	      _dl_signal_error (ENOMEM, file, "cannot extend global scope");	    }	  /* Copy over the old entries.  */	  memcpy (new_global, _dl_main_searchlist->r_list,		  (_dl_main_searchlist->r_nlist * sizeof (struct link_map *)));	  _dl_main_searchlist->r_list = new_global;	}      else if (_dl_main_searchlist->r_nlist == _dl_global_scope_alloc)	{	  /* We have to extend the existing array of link maps in the	     main map.  */	  struct link_map **new_global;	  new_global = (struct link_map **)	    malloc ((_dl_global_scope_alloc + 8) * sizeof (struct link_map *));	  if (new_global == NULL)	    goto nomem;	  _dl_global_scope_alloc += 8;	  _dl_main_searchlist->r_list = new_global;	}      /* Now add the new entry.  */      _dl_main_searchlist->r_list[_dl_main_searchlist->r_nlist] = new;      /* XXX Do we have to add something to r_dupsearchlist???  --drepper */    }  /* Notify the debugger we have added some objects.  We need to call     _dl_debug_initialize in a static program in case dynamic linking has     not been used before.  */  r = _dl_debug_initialize (0);  r->r_state = RT_ADD;  _dl_debug_state ();  /* Run the initializer functions of new objects.  */  while ((init = _dl_init_next (&new->l_searchlist)))    (*(void (*) (int, char **, char **)) init) (__libc_argc, __libc_argv,						__environ);  if (new->l_global)    /* Now we can make the new map available in the global scope.  */    ++_dl_main_searchlist->r_nlist;  if (_dl_sysdep_start == NULL)    /* We must be the static _dl_open in libc.a.  A static program that       has loaded a dynamic object now has competition.  */    __libc_multiple_libcs = 1;}