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| author | Ulrich Drepper <drepper@redhat.com> | 2009-12-15 12:32:27 -0800 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2009-12-15 12:32:27 -0800 |
| commit | 2af6396817fb9df98e63de75dd59fd999ee9f1d0 (patch) | |
| tree | d66827c66d770f1f3d697dbb027b59064e6ab0e0 /include/link.h | |
| parent | 2510d01ddba195f8cfaa3c2349f75e0612719d82 (diff) | |
| download | glibc-2af6396817fb9df98e63de75dd59fd999ee9f1d0.tar.gz glibc-2af6396817fb9df98e63de75dd59fd999ee9f1d0.tar.xz glibc-2af6396817fb9df98e63de75dd59fd999ee9f1d0.zip | |
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.h | 8 |
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; |