diff options
Diffstat (limited to 'elf/dl-open.c')
| -rw-r--r-- | elf/dl-open.c | 83 |
1 files changed, 78 insertions, 5 deletions
diff --git a/elf/dl-open.c b/elf/dl-open.c index f3d8368f88..2a03921101 100644 --- 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 @@ -87,7 +87,6 @@ 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; @@ -147,7 +146,7 @@ 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); @@ -208,8 +207,82 @@ 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 |