diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/dl-load.c | 6 | ||||
| -rw-r--r-- | elf/dl-open.c | 42 |
2 files changed, 33 insertions, 15 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c index afbb06b9e5..cb0642a6d2 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -1914,6 +1914,12 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded, } } + /* In case the LOADER information has only been provided to get to + the appropriate RUNPATH/RPATH information we do not need it + anymore. */ + if (mode & __RTLD_CALLMAP) + loader = NULL; + if (__builtin_expect (fd, 0) == -1) { if (trace_mode diff --git a/elf/dl-open.c b/elf/dl-open.c index 450024948a..c352722e27 100644 --- a/elf/dl-open.c +++ b/elf/dl-open.c @@ -163,32 +163,24 @@ dl_open_worker (void *a) const char *file = args->file; int mode = args->mode; struct link_map *new, *l; - const char *dst; int lazy; unsigned int i; #ifdef USE_TLS bool any_tls; #endif + struct link_map *call_map = NULL; /* Check whether _dl_open() has been called from a valid DSO. */ if (__check_caller (args->caller_dl_open, allow_libc|allow_libdl) != 0) GLRO(dl_signal_error) (0, "dlopen", NULL, N_("invalid caller")); - /* Maybe we have to expand a DST. */ - dst = strchr (file, '$'); - if (__builtin_expect (dst != NULL, 0)) + /* Determine the caller's map if necessary. This is needed in case + we have a DST or when the file name has no path in which case we + need to look along the RUNPATH/RPATH of the caller. */ + const char *dst = strchr (file, '$'); + if (dst != NULL || strchr (file, '/') == NULL) { const void *caller_dlopen = args->caller_dlopen; - size_t len = strlen (file); - size_t required; - struct link_map *call_map; - char *new_file; - - /* DSTs must not appear in SUID/SGID programs. */ - if (__libc_enable_secure) - /* This is an error. */ - GLRO(dl_signal_error) (0, "dlopen", NULL, - N_("DST not allowed in SUID/SGID programs")); /* We have to find out from which object the caller is calling. */ call_map = NULL; @@ -205,6 +197,21 @@ dl_open_worker (void *a) if (call_map == NULL) /* In this case we assume this is the main application. */ call_map = GL(dl_loaded); + } + + /* Maybe we have to expand a DST. */ + if (__builtin_expect (dst != NULL, 0)) + { + size_t len = strlen (file); + size_t required; + char *new_file; + + /* DSTs must not appear in SUID/SGID programs. */ + if (__libc_enable_secure) + /* This is an error. */ + GLRO(dl_signal_error) (0, "dlopen", NULL, + N_("DST not allowed in SUID/SGID programs")); + /* Determine how much space we need. We have to allocate the memory locally. */ @@ -223,10 +230,15 @@ dl_open_worker (void *a) /* Now we have a new file name. */ file = new_file; + + /* It does not matter whether call_map is set even if we + computed it only because of the DST. Since the path contains + a slash the value is not used. See dl-load.c. */ } /* Load the named object. */ - args->map = new = GLRO(dl_map_object) (NULL, file, 0, lt_loaded, 0, mode); + args->map = new = GLRO(dl_map_object) (call_map, file, 0, lt_loaded, 0, + mode | __RTLD_CALLMAP); /* If the pointer returned is NULL this means the RTLD_NOLOAD flag is set and the object is not already loaded. */ |