diff options
Diffstat (limited to 'elf/dl-load.c')
| -rw-r--r-- | elf/dl-load.c | 175 |
1 files changed, 121 insertions, 54 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c index bc0f942..290236b 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -576,6 +576,34 @@ decompose_rpath (struct r_search_path_struct *sps, sps->malloced = 1; } +/* Make sure cached path information is stored in *SP + and return true if there are any paths to search there. */ +static inline bool +cache_rpath (struct link_map *l, + struct r_search_path_struct *sp, + int tag, + const char *what) +{ + if (sp->dirs == (void *) -1) + return false; + + if (sp->dirs != NULL) + return true; + + if (l->l_info[tag] == NULL) + { + /* There is no path. */ + sp->dirs = (void *) -1; + return false; + } + + /* Make sure the cache information is available. */ + decompose_rpath (sp, (const char *) (D_PTR (l, l_info[DT_STRTAB]) + + l->l_info[tag]->d_un.d_val), + l, what); + return true; +} + void internal_function @@ -1747,29 +1775,9 @@ _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_rpath_dirs.dirs == NULL) - { - if (l->l_info[DT_RPATH] == NULL) - { - /* There is no path. */ - l->l_rpath_dirs.dirs = (void *) -1; - continue; - } - 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); - decompose_rpath (&l->l_rpath_dirs, - (const char *) ptrval, l, "RPATH"); - } - } - - if (l->l_rpath_dirs.dirs != (void *) -1) - fd = open_path (name, namelen, preloaded, &l->l_rpath_dirs, - &realname, &fb); - } + if (cache_rpath (l, &l->l_rpath_dirs, DT_RPATH, "RPATH")) + fd = open_path (name, namelen, preloaded, &l->l_rpath_dirs, + &realname, &fb); /* If dynamically linked, try the DT_RPATH of the executable itself. */ @@ -1785,37 +1793,12 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded, fd = open_path (name, namelen, preloaded, &env_path_list, &realname, &fb); - /* Look at the RUNPATH information for this binary. - - Note that this is no real loop. 'while' is used only to enable - us to use 'break' instead of a 'goto' to jump to the end. The - loop is always left after the first round. */ - while (fd == -1 && loader != NULL - && loader->l_runpath_dirs.dirs != (void *) -1) - { - if (loader->l_runpath_dirs.dirs == NULL) - { - if (loader->l_info[DT_RUNPATH] == NULL) - { - /* No RUNPATH. */ - loader->l_runpath_dirs.dirs = (void *) -1; - break; - } - 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); - decompose_rpath (&loader->l_runpath_dirs, - (const char *) ptrval, loader, "RUNPATH"); - } - } - - if (loader->l_runpath_dirs.dirs != (void *) -1) - fd = open_path (name, namelen, preloaded, - &loader->l_runpath_dirs, &realname, &fb); - break; - } + /* Look at the RUNPATH information for this binary. */ + if (fd == -1 && loader != NULL + && cache_rpath (loader, &loader->l_runpath_dirs, + DT_RUNPATH, "RUNPATH")) + fd = open_path (name, namelen, preloaded, + &loader->l_runpath_dirs, &realname, &fb); if (fd == -1 && (__builtin_expect (! preloaded, 1) @@ -1939,3 +1922,87 @@ cannot create shared object descriptor")); return _dl_map_object_from_fd (name, fd, &fb, realname, loader, type, mode); } INTDEF (_dl_map_object) + +void +internal_function +_dl_rtld_di_serinfo (struct link_map *loader, Dl_serinfo *si, bool counting) +{ + if (counting) + { + si->dls_cnt = 0; + si->dls_size = 0; + } + + unsigned int idx = 0; + char *allocptr = (char *) &si->dls_serpath[si->dls_cnt]; + inline void add_path (const struct r_search_path_struct *sps, + unsigned int flags) +# define add_path(sps, flags) add_path(sps, 0) /* XXX */ + { + if (sps->dirs != (void *) -1) + { + struct r_search_path_elem **dirs = sps->dirs; + do + { + const struct r_search_path_elem *const r = *dirs++; + if (counting) + { + si->dls_cnt++; + si->dls_size += r->dirnamelen; + } + else + { + Dl_serpath *const sp = &si->dls_serpath[idx++]; + sp->dls_name = allocptr; + allocptr = __mempcpy (allocptr, + r->dirname, r->dirnamelen - 1); + *allocptr++ = '\0'; + sp->dls_flags = flags; + } + } + while (*dirs != NULL); + } + } + + /* When the object has the RUNPATH information we don't use any RPATHs. */ + if (loader->l_info[DT_RUNPATH] == NULL) + { + /* First try the DT_RPATH of the dependent object that caused NAME + to be loaded. Then that object's dependent, and on up. */ + + struct link_map *l = loader; + do + { + if (cache_rpath (l, &l->l_rpath_dirs, DT_RPATH, "RPATH")) + add_path (&l->l_rpath_dirs, XXX_RPATH); + l = l->l_loader; + } + while (l != NULL); + + /* If dynamically linked, try the DT_RPATH of the executable itself. */ + l = GL(dl_loaded); + if (l != NULL && l->l_type != lt_loaded && l != loader) + if (cache_rpath (l, &l->l_rpath_dirs, DT_RPATH, "RPATH")) + add_path (&l->l_rpath_dirs, XXX_RPATH); + } + + /* Try the LD_LIBRARY_PATH environment variable. */ + add_path (&env_path_list, XXX_ENV); + + /* Look at the RUNPATH information for this binary. */ + if (cache_rpath (loader, &loader->l_runpath_dirs, DT_RUNPATH, "RUNPATH")) + add_path (&loader->l_runpath_dirs, XXX_RUNPATH); + + /* XXX + Here is where ld.so.cache gets checked, but we don't have + a way to indicate that in the results for Dl_serinfo. */ + + /* Finally, try the default path. */ + if (!(loader->l_flags_1 & DF_1_NODEFLIB)) + add_path (&rtld_search_dirs, XXX_default); + + if (counting) + /* Count the struct size before the string area, which we didn't + know before we completed dls_cnt. */ + si->dls_size += (char *) &si->dls_serpath[si->dls_cnt] - (char *) si; +} |