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authorUlrich Drepper <drepper@redhat.com>2009-12-15 12:32:27 -0800
committerUlrich Drepper <drepper@redhat.com>2009-12-15 12:32:27 -0800
commit2af6396817fb9df98e63de75dd59fd999ee9f1d0 (patch)
treed66827c66d770f1f3d697dbb027b59064e6ab0e0 /include/link.h
parentDefine bit_SSE2 and index_SSE2. (diff)
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Avoid ELF lookup race.
On some architectures the update of the l_used field in the lookup functions races with setting the other bits in the bitfield. Simply avoid this and optimize use of l_used in general.
Diffstat (limited to 'include/link.h')
-rw-r--r--include/link.h8
1 files changed, 5 insertions, 3 deletions
diff --git a/include/link.h b/include/link.h
index 4b9978ad61..26c67438f0 100644
--- a/include/link.h
+++ b/include/link.h
@@ -1,6 +1,6 @@
/* Data structure for communication from the run-time dynamic linker for
loaded ELF shared objects.
- Copyright (C) 1995-2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 1995-2006, 2007, 2009 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
@@ -180,7 +180,6 @@ struct link_map
unsigned int l_need_tls_init:1; /* Nonzero if GL(dl_init_static_tls)
should be called on this link map
when relocation finishes. */
- unsigned int l_used:1; /* Nonzero if the DSO is used. */
unsigned int l_auditing:1; /* Nonzero if the DSO is used in auditing. */
unsigned int l_audit_any_plt:1; /* Nonzero if at least one audit module
is interested in the PLT interception.*/
@@ -239,12 +238,15 @@ struct link_map
struct link_map **l_initfini;
/* List of the dependencies introduced through symbol binding. */
- unsigned int l_reldepsmax;
struct link_map_reldeps
{
unsigned int act;
struct link_map *list[];
} *l_reldeps;
+ unsigned int l_reldepsmax;
+
+ /* Nonzero if the DSO is used. */
+ unsigned int l_used;
/* Various flag words. */
ElfW(Word) l_feature_1;