diff options
Diffstat (limited to 'elf/dl-lookup.c')
| -rw-r--r-- | elf/dl-lookup.c | 83 |
1 files changed, 39 insertions, 44 deletions
diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c index 9d1e1f65af..895b60df7d 100644 --- a/elf/dl-lookup.c +++ b/elf/dl-lookup.c @@ -228,24 +228,7 @@ _dl_lookup_symbol (const char *undef_name, struct link_map *undef_map, for (scope = symbol_scope; *scope; ++scope) if (do_lookup (undef_name, hash, *ref, ¤t_value, *scope, 0, flags, NULL, type_class)) - { - /* We have to check whether this would bind UNDEF_MAP to an object - in the global scope which was dynamically loaded. In this case - we have to prevent the latter from being unloaded unless the - UNDEF_MAP object is also unloaded. */ - if (__builtin_expect (current_value.m->l_type == lt_loaded, 0) - /* Don't do this for explicit lookups as opposed to implicit - runtime lookups. */ - && (flags & DL_LOOKUP_ADD_DEPENDENCY) != 0 - /* Add UNDEF_MAP to the dependencies. */ - && add_dependency (undef_map, current_value.m) < 0) - /* Something went wrong. Perhaps the object we tried to reference - was just removed. Try finding another definition. */ - return INTUSE(_dl_lookup_symbol) (undef_name, undef_map, ref, - symbol_scope, type_class, 0); - - break; - } + break; if (__builtin_expect (current_value.s == NULL, 0)) { @@ -266,8 +249,8 @@ _dl_lookup_symbol (const char *undef_name, struct link_map *undef_map, protected = *ref && ELFW(ST_VISIBILITY) ((*ref)->st_other) == STV_PROTECTED; if (__builtin_expect (protected != 0, 0)) { - /* It is very tricky. We need to figure out what value to - return for the protected symbol */ + /* It is very tricky. We need to figure out what value to + return for the protected symbol. */ struct sym_val protected_value = { NULL, NULL }; for (scope = symbol_scope; *scope; ++scope) @@ -282,6 +265,21 @@ _dl_lookup_symbol (const char *undef_name, struct link_map *undef_map, } } + /* We have to check whether this would bind UNDEF_MAP to an object + in the global scope which was dynamically loaded. In this case + we have to prevent the latter from being unloaded unless the + UNDEF_MAP object is also unloaded. */ + if (__builtin_expect (current_value.m->l_type == lt_loaded, 0) + /* Don't do this for explicit lookups as opposed to implicit + runtime lookups. */ + && (flags & DL_LOOKUP_ADD_DEPENDENCY) != 0 + /* Add UNDEF_MAP to the dependencies. */ + && add_dependency (undef_map, current_value.m) < 0) + /* Something went wrong. Perhaps the object we tried to reference + was just removed. Try finding another definition. */ + return INTUSE(_dl_lookup_symbol) (undef_name, undef_map, ref, + symbol_scope, type_class, flags); + if (__builtin_expect (GL(dl_debug_mask) & (DL_DEBUG_BINDINGS|DL_DEBUG_PRELINK), 0)) _dl_debug_bindings (undef_name, undef_map, ref, symbol_scope, @@ -395,26 +393,7 @@ _dl_lookup_versioned_symbol (const char *undef_name, int res = do_lookup_versioned (undef_name, hash, *ref, ¤t_value, *scope, 0, version, NULL, type_class); if (res > 0) - { - /* We have to check whether this would bind UNDEF_MAP to an object - in the global scope which was dynamically loaded. In this case - we have to prevent the latter from being unloaded unless the - UNDEF_MAP object is also unloaded. */ - if (__builtin_expect (current_value.m->l_type == lt_loaded, 0) - /* Don't do this for explicit lookups as opposed to implicit - runtime lookups. */ - && flags != 0 - /* Add UNDEF_MAP to the dependencies. */ - && add_dependency (undef_map, current_value.m) < 0) - /* Something went wrong. Perhaps the object we tried to reference - was just removed. Try finding another definition. */ - return INTUSE(_dl_lookup_versioned_symbol) (undef_name, undef_map, - ref, symbol_scope, - version, type_class, - 0); - - break; - } + break; if (__builtin_expect (res, 0) < 0) { @@ -462,8 +441,8 @@ _dl_lookup_versioned_symbol (const char *undef_name, if (__builtin_expect (protected != 0, 0)) { - /* It is very tricky. We need to figure out what value to - return for the protected symbol */ + /* It is very tricky. We need to figure out what value to + return for the protected symbol. */ struct sym_val protected_value = { NULL, NULL }; for (scope = symbol_scope; *scope; ++scope) @@ -479,6 +458,22 @@ _dl_lookup_versioned_symbol (const char *undef_name, } } + /* We have to check whether this would bind UNDEF_MAP to an object + in the global scope which was dynamically loaded. In this case + we have to prevent the latter from being unloaded unless the + UNDEF_MAP object is also unloaded. */ + if (__builtin_expect (current_value.m->l_type == lt_loaded, 0) + /* Don't do this for explicit lookups as opposed to implicit + runtime lookups. */ + && flags != 0 + /* Add UNDEF_MAP to the dependencies. */ + && add_dependency (undef_map, current_value.m) < 0) + /* Something went wrong. Perhaps the object we tried to reference + was just removed. Try finding another definition. */ + return INTUSE(_dl_lookup_versioned_symbol) (undef_name, undef_map, + ref, symbol_scope, + version, type_class, flags); + if (__builtin_expect (GL(dl_debug_mask) & (DL_DEBUG_BINDINGS|DL_DEBUG_PRELINK), 0)) _dl_debug_bindings (undef_name, undef_map, ref, symbol_scope, @@ -545,8 +540,8 @@ _dl_lookup_versioned_symbol_skip (const char *undef_name, if (__builtin_expect (protected != 0, 0)) { - /* It is very tricky. We need to figure out what value to - return for the protected symbol */ + /* It is very tricky. We need to figure out what value to + return for the protected symbol. */ struct sym_val protected_value = { NULL, NULL }; if (i >= (*scope)->r_nlist |