diff options
Diffstat (limited to 'elf/dl-deps.c')
| -rw-r--r-- | elf/dl-deps.c | 79 |
1 files changed, 65 insertions, 14 deletions
diff --git a/elf/dl-deps.c b/elf/dl-deps.c index 7291cde..56f91f6 100644 --- a/elf/dl-deps.c +++ b/elf/dl-deps.c @@ -17,13 +17,15 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include <assert.h> #include <dlfcn.h> #include <errno.h> #include <stdlib.h> #include <string.h> +#include <sys/param.h> #include <elf/ldsodefs.h> -#include <assert.h> +#include <dl-dst.h> /* Whether an shared object references one or more auxiliary objects is signaled by the AUXTAG entry in l_info. */ @@ -39,6 +41,7 @@ reset if in _dl_close if the last global object is removed. */ size_t _dl_global_scope_alloc; +extern size_t _dl_platformlen; /* When loading auxiliary objects we must ignore errors. It's ok if an object is missing. */ @@ -48,7 +51,7 @@ struct openaux_args struct link_map *map; int trace_mode; const char *strtab; - const ElfW(Dyn) *d; + const char *name; /* The return value of openaux. */ struct link_map *aux; @@ -59,7 +62,7 @@ openaux (void *a) { struct openaux_args *args = (struct openaux_args *) a; - args->aux = _dl_map_object (args->map, args->strtab + args->d->d_un.d_val, 0, + args->aux = _dl_map_object (args->map, args->name, 0, (args->map->l_type == lt_executable ? lt_library : args->map->l_type), args->trace_mode); @@ -84,6 +87,43 @@ struct list }; +/* Macro to expand DST. It is an macro since we use `alloca'. */ +#define expand_dst(l, str, fatal) \ + ({ \ + const char *__str = (str); \ + const char *__result = __str; \ + size_t __cnt = DL_DST_COUNT(__str, 0); \ + \ + if (__cnt != 0) \ + { \ + char *__newp = (char *) alloca (DL_DST_REQUIRED (l, __str, \ + strlen (__str), \ + __cnt)); \ + \ + __result = DL_DST_SUBSTITUTE (l, __str, __newp, 0); \ + \ + if (*__result == '\0') \ + { \ + /* The replacement for the DST is not known. We can't \ + processed. */ \ + if (fatal) \ + _dl_signal_error (0, __str, \ + "empty dynamics string token substitution"); \ + else \ + { \ + /* This is for DT_AUXILIARY. */ \ + if (_dl_debug_libs) \ + _dl_debug_message (1, "cannot load auxiliary `", __str, \ + "' because of empty dynamic string" \ + " token substitution\n", NULL); \ + continue; \ + } \ + } \ + } \ + \ + __result; }) + + unsigned int internal_function _dl_map_object_deps (struct link_map *map, @@ -166,14 +206,21 @@ _dl_map_object_deps (struct link_map *map, if (__builtin_expect (d->d_tag, DT_NEEDED) == DT_NEEDED) { /* Map in the needed object. */ - struct link_map *dep - = _dl_map_object (l, strtab + d->d_un.d_val, 0, - l->l_type == lt_executable ? lt_library : - l->l_type, trace_mode); + struct link_map *dep; /* Allocate new entry. */ - struct list *newp = alloca (sizeof (struct list)); + struct list *newp; + /* Object name. */ + const char *name; + + /* Recognize DSTs. */ + name = expand_dst (l, strtab + d->d_un.d_val, 0); + + dep = _dl_map_object (l, name, 0, + l->l_type == lt_executable ? lt_library : + l->l_type, trace_mode); /* Add it in any case to the duplicate list. */ + newp = alloca (sizeof (struct list)); newp->map = dep; newp->dup = NULL; dtail->dup = newp; @@ -202,17 +249,22 @@ _dl_map_object_deps (struct link_map *map, { char *errstring; struct list *newp; + /* Object name. */ + const char *name; + + /* Recognize DSTs. */ + name = expand_dst (l, strtab + d->d_un.d_val, + d->d_tag == DT_AUXILIARY); if (d->d_tag == DT_AUXILIARY) { /* Store the tag in the argument structure. */ - args.d = d; + args.name = name; /* Say that we are about to load an auxiliary library. */ if (_dl_debug_libs) _dl_debug_message (1, "load auxiliary object=", - strtab + d->d_un.d_val, - " requested by file=", + name, " requested by file=", l->l_name[0] ? l->l_name : _dl_argv[0], "\n", NULL); @@ -233,15 +285,14 @@ _dl_map_object_deps (struct link_map *map, { /* Say that we are about to load an auxiliary library. */ if (_dl_debug_libs) - _dl_debug_message (1, "load filtered object=", - strtab + d->d_un.d_val, + _dl_debug_message (1, "load filtered object=", name, " requested by file=", l->l_name[0] ? l->l_name : _dl_argv[0], "\n", NULL); /* For filter objects the dependency must be available. */ - args.aux = _dl_map_object (l, strtab + d->d_un.d_val, 0, + args.aux = _dl_map_object (l, name, 0, (l->l_type == lt_executable ? lt_library : l->l_type), trace_mode); |