diff options
| -rw-r--r-- | elf/dl-sym.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/elf/dl-sym.c b/elf/dl-sym.c index 21e025b..3933194 100644 --- a/elf/dl-sym.c +++ b/elf/dl-sym.c @@ -80,6 +80,18 @@ call_dl_lookup (void *ptr) args->flags, NULL); } +/* Return the link map containing the caller address. */ +static inline struct link_map * +find_caller_link_map (ElfW(Addr) caller) +{ + struct link_map *l = _dl_find_dso_for_object (caller); + if (l != NULL) + return l; + else + /* If the address is not recognized the call comes from the main + program (we hope). */ + return GL(dl_ns)[LM_ID_BASE]._ns_loaded; +} static void * do_sym (void *handle, const char *name, void *who, @@ -89,13 +101,13 @@ do_sym (void *handle, const char *name, void *who, lookup_t result; ElfW(Addr) caller = (ElfW(Addr)) who; - struct link_map *l = _dl_find_dso_for_object (caller); - /* If the address is not recognized the call comes from the main - program (we hope). */ - struct link_map *match = l ? l : GL(dl_ns)[LM_ID_BASE]._ns_loaded; + /* Link map of the caller if needed. */ + struct link_map *match = NULL; if (handle == RTLD_DEFAULT) { + match = find_caller_link_map (caller); + /* Search the global scope. We have the simple case where we look up in the scope of an object which was part of the initial binary. And then the more complex part @@ -128,6 +140,8 @@ do_sym (void *handle, const char *name, void *who, } else if (handle == RTLD_NEXT) { + match = find_caller_link_map (caller); + if (__glibc_unlikely (match == GL(dl_ns)[LM_ID_BASE]._ns_loaded)) { if (match == NULL @@ -187,6 +201,9 @@ RTLD_NEXT used in code not dynamically loaded")); unsigned int ndx = (ref - (ElfW(Sym) *) D_PTR (result, l_info[DT_SYMTAB])); + if (match == NULL) + match = find_caller_link_map (caller); + if ((match->l_audit_any_plt | result->l_audit_any_plt) != 0) { unsigned int altvalue = 0; |