(dl_open_worker): Add code to add map to global scope.

diff --git a/elf/dl-open.c b/elf/dl-open.c
index 2cc185ea4aaa61428d74ed65e65f08e6287ca366..8195eadff571c63dbf49afb860321067c635be06 100644 (file)
--- a/elf/dl-open.c
+++ b/elf/dl-open.c
@@ -1,5 +1,5 @@
 /* Load a shared object at runtime, relocate it, and run its initializer.
-   Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -85,7 +85,6 @@ dl_open_worker (void *a)
   struct link_map *new, *l;
   ElfW(Addr) init;
   struct r_debug *r;
-  unsigned int global_add;
   const char *dst;
   int lazy;
 
@@ -139,7 +138,7 @@ dl_open_worker (void *a)
     return;
 
   /* Load that object's dependencies.  */
-  global_add = _dl_map_object_deps (new, NULL, 0, 0, mode & RTLD_GLOBAL);
+  _dl_map_object_deps (new, NULL, 0, 0);
 
   /* So far, so good.  Now check the versions.  */
   (void) _dl_check_all_versions (new, 0);
@@ -200,8 +199,82 @@ dl_open_worker (void *a)
                                                __environ);
 
   /* Now we can make the new map available in the global scope.  */
-  while (global_add-- > 0)
-    _dl_main_searchlist->r_list[_dl_main_searchlist->r_nlist++]->l_global = 1;
+  if (mode & RTLD_GLOBAL)
+    {
+      struct link_map **new_global;
+      unsigned int to_add = 0;
+      unsigned int cnt;
+
+      /* Count the objects we have to put in the global scope.  */
+      for (cnt = 0; cnt < new->l_searchlist.r_nlist; ++cnt)
+       if (new->l_searchlist.r_list[cnt]->l_global == 0)
+         ++to_add;
+
+      /* The symbols of the new objects 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.  */
+         _dl_global_scope_alloc = _dl_main_searchlist->r_nlist + to_add + 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:
+             _dl_signal_error (ENOMEM, new->l_libname->name,
+                               "cannot extend global scope");
+             return;
+           }
+
+         /* 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 + to_add > _dl_global_scope_alloc)
+       {
+         /* We have to extend the existing array of link maps in the
+            main map.  */
+         new_global = (struct link_map **)
+           realloc (_dl_main_searchlist->r_list,
+                    ((_dl_global_scope_alloc + to_add + 8)
+                     * sizeof (struct link_map *)));
+         if (new_global == NULL)
+           goto nomem;
+
+         _dl_global_scope_alloc += to_add + 8;
+         _dl_main_searchlist->r_list = new_global;
+       }
+
+      /* Now add the new entries.  */
+      for (cnt = 0; cnt < new->l_searchlist.r_nlist; ++cnt)
+       {
+         struct link_map *map = new->l_searchlist.r_list[cnt];
+
+         if (map->l_global == 0)
+           {
+             map->l_global = 1;
+             _dl_main_searchlist->r_list[_dl_main_searchlist->r_nlist] = map;
+             ++_dl_main_searchlist->r_nlist;
+           }
+       }
+
+      /* XXX Do we have to add something to r_dupsearchlist???  --drepper */
+    }
 
   if (_dl_sysdep_start == NULL)
     /* We must be the static _dl_open in libc.a.  A static program that