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--- rtld-elf/rtld.c.orig 2007-04-07 23:17:00 +0000
+++ rtld-elf/rtld.c 2007-04-23 09:42:32 +0000
@@ -988,6 +988,103 @@
return NULL;
}
+#define MAX_LIBRARIES_HITS 255
+
+struct fill_library_paths_args {
+ const char *name;
+ size_t namelen;
+ char **libraries;
+ size_t *count;
+};
+
+static void *
+fill_library_paths(const char *dir, size_t dirlen, void *param)
+{
+ struct fill_library_paths_args *arg;
+
+ arg = param;
+ if (*(arg->count) > MAX_LIBRARIES_HITS)
+ return (NULL);
+
+ if (*dir == '/' || trust) {
+ arg->libraries[*(arg->count)] = malloc(sizeof(char)*(dirlen + 1 + arg->namelen + 1));
+ strncpy(arg->libraries[*(arg->count)], dir, dirlen);
+ arg->libraries[*(arg->count)][dirlen] = '/';
+ strncpy(arg->libraries[*(arg->count)] + dirlen + 1, arg->name, arg->namelen+1);
+
+ dbg(" Trying \"%s\"\n", arg->libraries[*(arg->count)]);
+ if (access(arg->libraries[*(arg->count)], F_OK) == 0) {
+ *(arg->count) += 1;
+ }
+ }
+ return (NULL);
+}
+
+/**
+ * Find all libraries matching xname for the object refobj (if not null), like
+ * find_library but find all the matching libraries in the paths.
+ *
+ * The returned pointer has to be free()'d (as well as the contained strings)
+ * if it's non-NULL.
+ * The end of the array is found when the pointer gets NULL.
+ */
+static char **find_libraries(const char *xname, const Obj_Entry *refobj)
+{
+ char **libraries;
+ size_t libraries_count;
+ struct fill_library_paths_args arg;
+ char *name;
+
+ if (strchr(xname, '/') != NULL) { /* Hard coded pathname */
+ if (xname[0] != '/' && !trust) {
+ _rtld_error("Absolute pathname required for shared object \"%s\"",
+ xname);
+ return NULL;
+ }
+ libraries = malloc(sizeof(char*)*2);
+ libraries[0] = xstrdup(xname);
+ libraries[1] = NULL;
+ return libraries;
+ }
+
+ if (libmap_disable || (refobj == NULL) ||
+ (name = lm_find(refobj->path, xname)) == NULL)
+ name = (char *)xname;
+
+ dbg(" Searching for \"%s\"", name);
+
+ /* look up at maximum 255 libraries, would be crazy going over that */
+ libraries = malloc(sizeof(char*)*(MAX_LIBRARIES_HITS+1));
+ libraries_count = 0;
+
+ arg.name = name;
+ arg.namelen = strlen(name);
+ arg.libraries = libraries;
+ arg.count = &libraries_count;
+
+ path_enumerate(ld_library_path, fill_library_paths, &arg);
+ if(refobj != NULL)
+ path_enumerate(refobj->rpath, fill_library_paths, &arg);
+ path_enumerate(gethints(), fill_library_paths, &arg);
+ path_enumerate(STANDARD_LIBRARY_PATH, fill_library_paths, &arg);
+
+ libraries[libraries_count] = NULL;
+
+ if(libraries_count == 0) {
+ if(refobj != NULL && refobj->path != NULL) {
+ _rtld_error("Shared object \"%s\" not found, required by \"%s\"",
+ name, basename(refobj->path));
+ } else {
+ _rtld_error("Shared object \"%s\" not found", name);
+ }
+
+ free(libraries);
+ return NULL;
+ }
+
+ return libraries;
+}
+
/*
* Given a symbol number in a referencing object, find the corresponding
* definition of the symbol. Returns a pointer to the symbol, or NULL if
@@ -1260,7 +1357,29 @@
Needed_Entry *needed;
for (needed = obj->needed; needed != NULL; needed = needed->next) {
- needed->obj = load_object(obj->strtab + needed->name, obj);
+ const char *name = obj->strtab + needed->name;
+ char **paths = find_libraries(name, obj);
+ char **curpath = paths;
+
+ needed->obj = NULL;
+ if (paths == NULL) {
+ if (ld_tracing)
+ continue;
+ else
+ return -1;
+ }
+
+ while(*curpath) {
+ if (needed->obj == NULL) {
+ needed->obj = load_object(*curpath, NULL);
+ curpath++;
+ continue;
+ }
+ /* Continue, so that we can free the whole lot */
+ free(*curpath);
+ curpath++;
+ }
+ free(paths);
if (needed->obj == NULL && !ld_tracing)
return -1;
}
|
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