diff options
Diffstat (limited to 'elf/dl-deps.c')
-rw-r--r-- | elf/dl-deps.c | 73 |
1 files changed, 47 insertions, 26 deletions
diff --git a/elf/dl-deps.c b/elf/dl-deps.c index f034196..7a67729 100644 --- a/elf/dl-deps.c +++ b/elf/dl-deps.c @@ -32,7 +32,7 @@ _dl_map_object_deps (struct link_map *map, struct link_map *map; struct list *next; }; - struct list head[2 + npreloads], *tailp, *scanp; + struct list *head, *tailp, *scanp; struct list duphead, *duptailp; unsigned int nduplist; unsigned int nlist, naux, i; @@ -49,36 +49,57 @@ _dl_map_object_deps (struct link_map *map, naux = nlist = 0; -#define AUXTAG (DT_NUM + DT_PROCNUM + DT_EXTRATAGIDX (DT_AUXILIARY)) + /* XXX The AUXILIARY implementation isn't correct in the moment. XXX + XXX The problem is that we currently do not handle auxiliary XXX + XXX entries in the loaded objects. XXX */ +#define AUXTAG (DT_NUM + DT_PROCNUM + DT_VERSIONTAGNUM \ + + DT_EXTRATAGIDX (DT_AUXILIARY)) + + /* First determine the number of auxiliary objects we have to load. */ if (map->l_info[AUXTAG]) { - /* There is an auxiliary library specified. We try to load it, - and if we can, use its symbols in preference to our own. - But if we can't load it, we just silently ignore it. - XXX support multiple DT_AUXILIARYs? - */ - struct link_map *aux; - void openaux (void) - { - const char *strtab - = ((void *) map->l_addr + map->l_info[DT_STRTAB]->d_un.d_ptr); - aux = _dl_map_object (map, strtab + map->l_info[AUXTAG]->d_un.d_val, - map->l_type == lt_executable ? lt_library : - map->l_type, trace_mode); - } - char *errstring; - const char *objname; - if (! _dl_catch_error (&errstring, &objname, &openaux)) - { - /* The auxiliary object is actually there. Use it - as the first search element, even before MAP itself. */ - preload (aux); - naux = 1; - } + ElfW(Dyn) *d; + for (d = map->l_ld; d->d_tag != DT_NULL; ++d) + if (d->d_tag == DT_AUXILIARY) + ++naux; + } + + /* Now we can allocate the array for the linker maps. */ + head = (struct list *) alloca (sizeof (struct list) + * (naux + npreloads + 2)); + + /* Load the auxiliary objects, even before the object itself. */ + if (map->l_info[AUXTAG]) + { + /* There is at least one auxiliary library specified. We try to + load it, and if we can, use its symbols in preference to our + own. But if we can't load it, we just silently ignore it. */ + const char *strtab + = ((void *) map->l_addr + map->l_info[DT_STRTAB]->d_un.d_ptr); + ElfW(Dyn) *d; + + for (d = map->l_ld; d->d_tag != DT_NULL; ++d) + if (d->d_tag == DT_AUXILIARY) + { + struct link_map *aux; + void openaux (void) + { + aux = _dl_map_object (map, strtab + d->d_un.d_val, + (map->l_type == lt_executable + ? lt_library : map->l_type), + trace_mode); + } + char *errstring; + const char *objname; + if (! _dl_catch_error (&errstring, &objname, openaux)) + /* The auxiliary object is actually there. Use it as + the first search element, even before MAP itself. */ + preload (aux); + } } - /* Start the search list with one element: MAP itself. */ + /* Next load MAP itself. */ preload (map); /* Add the preloaded items after MAP but before any of its dependencies. */ |