diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/dl-load.c | 42 | ||||
| -rw-r--r-- | elf/dl-support.c | 3 | ||||
| -rw-r--r-- | elf/ldsodefs.h | 3 | ||||
| -rw-r--r-- | elf/rtld.c | 16 |
4 files changed, 52 insertions, 12 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c index ce29e3c3d5..4fc0a022d6 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -281,16 +281,41 @@ fillin_rpath (char *rpath, struct r_search_path_elem **result, const char *sep, static struct r_search_path_elem ** internal_function -decompose_rpath (const char *rpath, size_t additional_room, - const char *what, const char *where) +decompose_rpath (const char *rpath, size_t additional_room, const char *where) { /* Make a copy we can work with. */ - char *copy = local_strdup (rpath); + char *copy; char *cp; struct r_search_path_elem **result; - /* First count the number of necessary elements in the result array. */ - size_t nelems = 0; + size_t nelems; + + /* First see whether we must forget the RPATH from this object. */ + if (_dl_ignore_rpath != NULL && !__libc_enable_secure) + { + const char *found = strstr (_dl_ignore_rpath, where); + if (found != NULL) + { + size_t len = strlen (where); + if ((found == _dl_ignore_rpath || found[-1] == ':') + && (found[len] == '\0' || found[len] == ':')) + { + /* This object is on the list of objects for which the RPATH + must not be used. */ + result = (struct r_search_path_elem **) + malloc ((additional_room + 1) * sizeof (*result)); + if (result == NULL) + _dl_signal_error (ENOMEM, NULL, + "cannot create cache for search path"); + result[0] = NULL; + + return result; + } + } + } + /* Count the number of necessary elements in the result array. */ + copy = local_strdup (rpath); + nelems = 0; for (cp = copy; *cp != '\0'; ++cp) if (*cp == ':') ++nelems; @@ -303,7 +328,7 @@ decompose_rpath (const char *rpath, size_t additional_room, if (result == NULL) _dl_signal_error (ENOMEM, NULL, "cannot create cache for search path"); - return fillin_rpath (copy, result, ":", NULL, what, where); + return fillin_rpath (copy, result, ":", NULL, "RPATH", where); } @@ -399,7 +424,7 @@ _dl_init_paths (const char *llp) decompose_rpath ((const char *) (l->l_addr + l->l_info[DT_STRTAB]->d_un.d_ptr + l->l_info[DT_RPATH]->d_un.d_val), - nllp, "RPATH", l->l_name); + nllp, l->l_name); } else { @@ -1056,8 +1081,7 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded, + l->l_info[DT_STRTAB]->d_un.d_ptr + l->l_info[DT_RPATH]->d_un.d_val); l->l_rpath_dirs = - decompose_rpath ((const char *) ptrval, 0, - "RPATH", l->l_name); + decompose_rpath ((const char *) ptrval, 0, l->l_name); } if (l->l_rpath_dirs != (struct r_search_path_elem **) -1l) diff --git a/elf/dl-support.c b/elf/dl-support.c index 2702404444..0a14b6d1bd 100644 --- a/elf/dl-support.c +++ b/elf/dl-support.c @@ -55,6 +55,9 @@ struct r_search_path *_dl_search_paths; const char *_dl_profile; struct link_map *_dl_profile_map; +/* Names of shared object for which the RPATHs should be ignored. */ +const char *_dl_ignore_rpath; + static void non_dynamic_init (void) __attribute__ ((unused)); diff --git a/elf/ldsodefs.h b/elf/ldsodefs.h index 19d931fd4e..a64f51bca6 100644 --- a/elf/ldsodefs.h +++ b/elf/ldsodefs.h @@ -149,6 +149,9 @@ extern unsigned long int _dl_hwcap_mask; /* File deccriptor to write debug messages to. */ extern int _dl_debug_fd; +/* Names of shared object for which the RPATH should be ignored. */ +extern const char *_dl_ignore_rpath; + /* OS-dependent function to open the zero-fill device. */ extern int _dl_sysdep_open_zero_fill (void); /* dl-sysdep.c */ diff --git a/elf/rtld.c b/elf/rtld.c index 75012e3f20..51a295cfb2 100644 --- a/elf/rtld.c +++ b/elf/rtld.c @@ -81,6 +81,8 @@ int _dl_debug_symbols; int _dl_debug_versions; int _dl_debug_reloc; int _dl_debug_files; +const char *_dl_ignore_rpath; /* RPATH values which should be + ignored. */ /* Set nonzero during loading and initialization of executable and libraries, cleared before the executable's entry point runs. This @@ -334,8 +336,7 @@ dl_main (const ElfW(Phdr) *phdr, --_dl_argc; ++_dl_argv; } - else if (! strcmp (_dl_argv[1], "--library-path") - && _dl_argc > 2) + else if (! strcmp (_dl_argv[1], "--library-path") && _dl_argc > 2) { library_path = _dl_argv[2]; @@ -343,6 +344,14 @@ dl_main (const ElfW(Phdr) *phdr, _dl_argc -= 2; _dl_argv += 2; } + else if (! strcmp (_dl_argv[1], "--ignore-rpath") && _dl_argc > 2) + { + _dl_ignore_rpath = _dl_argv[2]; + + _dl_skip_args += 2; + _dl_argc -= 2; + _dl_argv += 2; + } else break; @@ -367,7 +376,8 @@ of this helper program; chances are you did not intend to run this program.\n\ --verify verify that given object really is a dynamically linked\n\ object we get handle\n\ --library-path PATH use given PATH instead of content of the environment\n\ - variable LD_LIBRARY_PATH\n", + variable LD_LIBRARY_PATH\n\ + --ignore-rpath LIST ignore RPATH information in object names in LIST\n", NULL); ++_dl_skip_args; |