diff options
Diffstat (limited to 'elf/dl-runtime.c')
| -rw-r--r-- | elf/dl-runtime.c | 50 |
1 files changed, 45 insertions, 5 deletions
diff --git a/elf/dl-runtime.c b/elf/dl-runtime.c index f92cbe26bd..8bf5b89eb6 100644 --- a/elf/dl-runtime.c +++ b/elf/dl-runtime.c @@ -1,5 +1,5 @@ /* On-demand PLT fixup for shared objects. - Copyright (C) 1995-2002,2003,2004,2005 Free Software Foundation, Inc. + Copyright (C) 1995-2002,2003,2004,2005,2006 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 @@ -24,6 +24,7 @@ #include <unistd.h> #include <sys/param.h> #include <ldsodefs.h> +#include <sysdep-cancel.h> #include "dynamic-link.h" #if (!defined ELF_MACHINE_NO_RELA && !defined ELF_MACHINE_PLT_REL) \ @@ -92,16 +93,36 @@ _dl_fixup ( version = NULL; } + struct r_scoperec *scoperec = l->l_scoperec; + if (l->l_type == lt_loaded && !SINGLE_THREAD_P) + { + __rtld_mrlock_lock (l->l_scoperec_lock); + scoperec = l->l_scoperec; + atomic_increment (&scoperec->nusers); + __rtld_mrlock_unlock (l->l_scoperec_lock); + } + result = _dl_lookup_symbol_x (strtab + sym->st_name, l, &sym, - l->l_scope, version, ELF_RTYPE_CLASS_PLT, + scoperec->scope, version, + ELF_RTYPE_CLASS_PLT, DL_LOOKUP_ADD_DEPENDENCY, NULL); + if (l->l_type == lt_loaded && !SINGLE_THREAD_P + && atomic_decrement_val (&scoperec->nusers) == 0 + && __builtin_expect (scoperec->remove_after_use, 0)) + { + if (scoperec->notify) + __rtld_notify (scoperec->nusers); + else + free (scoperec); + } + /* Currently result contains the base load address (or link map) of the object that defines sym. Now add in the symbol offset. */ value = DL_FIXUP_MAKE_VALUE (result, - sym ? LOOKUP_VALUE_ADDRESS (result) - + sym->st_value : 0); + sym ? (LOOKUP_VALUE_ADDRESS (result) + + sym->st_value) : 0); } else { @@ -174,11 +195,30 @@ _dl_profile_fixup ( version = NULL; } + struct r_scoperec *scoperec = l->l_scoperec; + if (l->l_type == lt_loaded && !SINGLE_THREAD_P) + { + __rtld_mrlock_lock (l->l_scoperec_lock); + scoperec = l->l_scoperec; + atomic_increment (&scoperec->nusers); + __rtld_mrlock_unlock (l->l_scoperec_lock); + } + result = _dl_lookup_symbol_x (strtab + refsym->st_name, l, &defsym, - l->l_scope, version, + scoperec->scope, version, ELF_RTYPE_CLASS_PLT, DL_LOOKUP_ADD_DEPENDENCY, NULL); + if (l->l_type == lt_loaded && !SINGLE_THREAD_P + && atomic_decrement_val (&scoperec->nusers) == 0 + && __builtin_expect (scoperec->remove_after_use, 0)) + { + if (scoperec->notify) + __rtld_notify (scoperec->nusers); + else + free (scoperec); + } + /* Currently result contains the base load address (or link map) of the object that defines sym. Now add in the symbol offset. */ |