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| author | Jakub Jelinek <jakub@redhat.com> | 2007-07-31 13:33:18 +0000 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2007-07-31 13:33:18 +0000 |
| commit | 32c075e1f01849e161724bbd400ba77244e482cc (patch) | |
| tree | 5f083a3f352104f32bb6c902d57fa3f294bd8d4d /elf/do-lookup.h | |
| parent | d6220e9ee38c1c9285221b023346201ec5f511b3 (diff) | |
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Diffstat (limited to 'elf/do-lookup.h')
| -rw-r--r-- | elf/do-lookup.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/elf/do-lookup.h b/elf/do-lookup.h index 2585d83005..ab9a510ba1 100644 --- a/elf/do-lookup.h +++ b/elf/do-lookup.h @@ -1,5 +1,5 @@ /* Look up a symbol in the loaded objects. - Copyright (C) 1995-2004, 2005, 2006 Free Software Foundation, Inc. + Copyright (C) 1995-2004, 2005, 2006, 2007 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 @@ -29,8 +29,13 @@ do_lookup_x (const char *undef_name, uint_fast32_t new_hash, const struct r_found_version *const version, int flags, struct link_map *skip, int type_class) { - struct link_map **list = scope->r_list; size_t n = scope->r_nlist; + /* Make sure we read the value before proceeding. Otherwise we + might use r_list pointing to the initial scope and r_nlist being + the value after a resize. That is the only path in dl-open.c not + protected by GSCOPE. A read barrier here might be to expensive. */ + __asm volatile ("" : "+r" (n), "+m" (scope->r_list)); + struct link_map **list = scope->r_list; do { |