diff options
Diffstat (limited to 'elf/link.h')
| -rw-r--r-- | elf/link.h | 66 |
1 files changed, 62 insertions, 4 deletions
diff --git a/elf/link.h b/elf/link.h index b05ecca199..58041332e9 100644 --- a/elf/link.h +++ b/elf/link.h @@ -74,6 +74,13 @@ extern struct r_debug _r_debug; extern ElfW(Dyn) _DYNAMIC[]; +/* For the version handling we need an array with only names and their + hash values. */ +typedef struct +{ + const char *name; + ElfW(Word) hash; +} hash_name_pair; /* Structure describing a loaded shared object. The `l_next' and `l_prev' members form a chain of all the shared objects loaded at startup. @@ -94,7 +101,11 @@ struct link_map /* All following members are internal to the dynamic linker. They may change without notice. */ - const char *l_libname; /* Name requested (before search). */ + struct libname_list + { + const char *name; /* Name requested (before search). */ + struct libname_list *next; /* Link to next name for this object. */ + } *l_libname; /* Indexed pointers to dynamic section. [0,DT_NUM) are indexed by the processor-independent tags. [DT_NUM,DT_NUM+DT_PROCNUM) are indexed by the tag minus DT_LOPROC. @@ -139,13 +150,34 @@ struct link_map unsigned int l_init_running:1; /* Nonzero while DT_INIT function runs. */ unsigned int l_global:1; /* Nonzero if object in _dl_global_scope. */ unsigned int l_reserved:2; /* Reserved for internal use. */ + + /* Array with version names. */ + unsigned int l_nversions; + hash_name_pair *l_versions; }; +/* Test whether given NAME matches any of the names of the given object. */ +static inline int +__attribute__ ((unused)) +_dl_does_name_match_p (const char *__name, struct link_map *__map) +{ + int __found = strcmp (__name, __map->l_name) == 0; + struct libname_list *__runp = __map->l_libname; + + while (! __found && __runp != NULL) + if (strcmp (__name, __runp->name) == 0) + __found = 1; + else + __runp = __runp->next; + + return __found; +} + /* Function used as argument for `_dl_receive_error' function. The - arguments are the error string and the objname the error occurred - in. */ -typedef void (*receiver_fct) (const char *, const char *); + arguments are the error code, error string, and the objname the + error occurred in. */ +typedef void (*receiver_fct) (int, const char *, const char *); /* Internal functions of the run-time dynamic linker. These can be accessed if you link again the dynamic linker @@ -264,6 +296,14 @@ extern ElfW(Addr) _dl_lookup_symbol (const char *undef, const char *reference_name, int flags); +/* Lookup versioned symbol. */ +extern ElfW(Addr) _dl_lookup_versioned_symbol (const char *undef, + const ElfW(Sym) **sym, + struct link_map *symbol_scope[], + const char *reference_name, + const hash_name_pair *version, + int flags); + /* For handling RTLD_NEXT we must be able to skip shared objects. */ extern ElfW(Addr) _dl_lookup_symbol_skip (const char *undef, const ElfW(Sym) **sym, @@ -272,6 +312,16 @@ extern ElfW(Addr) _dl_lookup_symbol_skip (const char *undef, struct link_map *skip_this, int flags); +/* For handling RTLD_NEXT with versioned symbols we must be able to + skip shared objects. */ +extern ElfW(Addr) _dl_lookup_versioned_symbol_skip (const char *undef, + const ElfW(Sym) **sym, + struct link_map *symbol_scope[], + const char *reference_name, + const char *version_name, + struct link_map *skip_this, + int flags); + /* Look up symbol NAME in MAP's scope and return its run-time address. */ extern ElfW(Addr) _dl_symbol_value (struct link_map *map, const char *name); @@ -319,6 +369,14 @@ extern void _dl_relocate_object (struct link_map *map, struct link_map *scope[], int lazy); +/* Check the version dependencies of all objects available through + MAP. If VERBOSE print some more diagnostics. */ +extern int _dl_check_all_versions (struct link_map *map, int verbose); + +/* Check the version dependencies for MAP. If VERBOSE print some more + diagnostics. */ +extern int _dl_check_map_versions (struct link_map *map, int verbose); + /* Return the address of the next initializer function for MAP or one of its dependencies that has not yet been run. When there are no more initializers to be run, this returns zero. The functions are returned |