diff options
Diffstat (limited to 'elf/dl-load.c')
| -rw-r--r-- | elf/dl-load.c | 113 |
1 files changed, 70 insertions, 43 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c index e57de81015..d337182aa7 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -596,11 +596,11 @@ _dl_init_paths (const char *llp) l, "RUNPATH"); /* The RPATH is ignored. */ - l->l_rpath_dirs = NULL; + l->l_rpath_dirs = (void *) -1; } else { - l->l_runpath_dirs = NULL; + l->l_runpath_dirs = (void *) -1; if (l->l_info[DT_RPATH]) /* Allocate room for the search path and fill in information @@ -610,7 +610,7 @@ _dl_init_paths (const char *llp) + l->l_info[DT_RPATH]->d_un.d_val), l, "RPATH"); else - l->l_rpath_dirs = NULL; + l->l_rpath_dirs = (void *) -1; } } #endif /* SHARED */ @@ -639,6 +639,8 @@ _dl_init_paths (const char *llp) (void) fillin_rpath (local_strdup (llp), env_path_list, ":;", __libc_enable_secure, "LD_LIBRARY_PATH", NULL); } + else + env_path_list = (void *) -1; } @@ -1159,18 +1161,14 @@ print_search_path (struct r_search_path_elem **list, static int open_path (const char *name, size_t namelen, int preloaded, - struct r_search_path_elem **dirs, + struct r_search_path_elem ***dirsp, char **realname) { + struct r_search_path_elem **dirs = *dirsp; char *buf; int fd = -1; const char *current_what = NULL; - - if (dirs == NULL || *dirs == NULL) - { - __set_errno (ENOENT); - return -1; - } + int any = 0; buf = alloca (max_dirnamelen + max_capstrlen + namelen); do @@ -1228,6 +1226,9 @@ open_path (const char *name, size_t namelen, int preloaded, } } + /* Remember whether we found any existing directory. */ + any |= this_dir->status[cnt] == existing; + if (fd != -1 && preloaded && __libc_enable_secure) { /* This is an extra security effort to make sure nobody can @@ -1272,6 +1273,13 @@ open_path (const char *name, size_t namelen, int preloaded, } while (*++dirs != NULL); + /* Remove the whole path if none of the directories exists. */ + if (! any) + { + free (*dirsp); + *dirsp = (void *) -1; + } + return -1; } @@ -1340,50 +1348,68 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded, /* First try the DT_RPATH of the dependent object that caused NAME to be loaded. Then that object's dependent, and on up. */ for (l = loader; fd == -1 && l; l = l->l_loader) - if (l->l_info[DT_RPATH]) - { - /* Make sure the cache information is available. */ - if (l->l_rpath_dirs == NULL) - { - size_t ptrval = (D_PTR (l, l_info[DT_STRTAB]) - + l->l_info[DT_RPATH]->d_un.d_val); - l->l_rpath_dirs = - decompose_rpath ((const char *) ptrval, l, "RPATH"); - } - - if (l->l_rpath_dirs != NULL) - fd = open_path (name, namelen, preloaded, l->l_rpath_dirs, - &realname); - } + { + if (l->l_rpath_dirs == NULL) + { + if (l->l_info[DT_RPATH] == NULL) + /* There is no path. */ + l->l_rpath_dirs = (void *) -1; + else + { + /* Make sure the cache information is available. */ + size_t ptrval = (D_PTR (l, l_info[DT_STRTAB]) + + l->l_info[DT_RPATH]->d_un.d_val); + l->l_rpath_dirs = + decompose_rpath ((const char *) ptrval, l, + "RPATH"); + + if (l->l_rpath_dirs != (void *) -1) + fd = open_path (name, namelen, preloaded, + &l->l_rpath_dirs, &realname); + } + } + else if (l->l_rpath_dirs != (void *) -1) + fd = open_path (name, namelen, preloaded, &l->l_rpath_dirs, + &realname); + } /* If dynamically linked, try the DT_RPATH of the executable itself. */ l = _dl_loaded; if (fd == -1 && l && l->l_type != lt_loaded && l != loader - && l->l_rpath_dirs != NULL) - fd = open_path (name, namelen, preloaded, l->l_rpath_dirs, + && l->l_rpath_dirs != (void *) -1) + fd = open_path (name, namelen, preloaded, &l->l_rpath_dirs, &realname); } /* Try the LD_LIBRARY_PATH environment variable. */ - if (fd == -1 && env_path_list != NULL) - fd = open_path (name, namelen, preloaded, env_path_list, &realname); + if (fd == -1 && env_path_list != (void *) -1) + fd = open_path (name, namelen, preloaded, &env_path_list, &realname); /* Look at the RUNPATH informaiton for this binary. */ - if (loader != NULL && loader->l_info[DT_RUNPATH]) + if (loader != NULL && loader->l_runpath_dirs != (void *) -1) { - /* Make sure the cache information is available. */ - if (loader->l_runpath_dirs == NULL) - { - size_t ptrval = (D_PTR (loader, l_info[DT_STRTAB]) - + loader->l_info[DT_RUNPATH]->d_un.d_val); - loader->l_runpath_dirs = - decompose_rpath ((const char *) ptrval, loader, "RUNPATH"); - } - - if (loader->l_runpath_dirs != NULL) - fd = open_path (name, namelen, preloaded, loader->l_runpath_dirs, - &realname); + if (loader->l_runpath_dirs == NULL) + { + if (loader->l_info[DT_RUNPATH] == NULL) + /* No RUNPATH. */ + loader->l_runpath_dirs = (void *) -1; + else + { + /* Make sure the cache information is available. */ + size_t ptrval = (D_PTR (loader, l_info[DT_STRTAB]) + + loader->l_info[DT_RUNPATH]->d_un.d_val); + loader->l_runpath_dirs = + decompose_rpath ((const char *) ptrval, loader, "RUNPATH"); + + if (loader->l_runpath_dirs != (void *) -1) + fd = open_path (name, namelen, preloaded, + &loader->l_runpath_dirs, &realname); + } + } + else if (loader->l_runpath_dirs != (void *) -1) + fd = open_path (name, namelen, preloaded, + &loader->l_runpath_dirs, &realname); } if (fd == -1) @@ -1409,7 +1435,8 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded, /* Finally, try the default path. */ if (fd == -1) - fd = open_path (name, namelen, preloaded, rtld_search_dirs, &realname); + fd = open_path (name, namelen, preloaded, &rtld_search_dirs, + &realname); /* Add another newline when we a tracing the library loading. */ if (__builtin_expect (_dl_debug_libs, 0)) |