libkern/kxld/kxld.c

92 static kern_return_t init_context(KXLDContext *context, u_int ndependencies);
93 static kern_return_t init_kext_objects(KXLDContext *context, u_char *file,
96 static KXLDObject * get_object_for_file(KXLDContext *context,
98 static u_char * allocate_kext(KXLDContext *context, void *callback_data,
100 static void clear_context(KXLDContext *context);
110     KXLDContext       * context         = NULL;
121     context = kxld_alloc(sizeof(*context));
122     require_action(context, finish, rval=KERN_RESOURCE_SHORTAGE);
123     bzero(context, sizeof(*context));
125     context->flags = flags;
126     context->allocate_callback = allocate_callback;
127     context->cputype = cputype;
128     context->cpusubtype = cpusubtype;
132     context->kext = kxld_alloc(kxld_kext_sizeof());
133     require_action(context->kext, finish, rval=KERN_RESOURCE_SHORTAGE);
134     bzero(context->kext, kxld_kext_sizeof());
140     context->section_order = s_section_order;
153     context->section_order = kxld_dict_find(s_order_dict, &cputype);
158     if (!context->section_order) {
178         context->section_order = section_order;
185     *_context = context;
186     context = NULL;
189     if (context) kxld_destroy_context(context);
201 kxld_destroy_context(KXLDContext *context)
207     check(context);
209     kxld_kext_deinit(context->kext);
211     for (i = 0; i < context->objects.maxitems; ++i) {
212         object = kxld_array_get_slot(&context->objects, i);
215     kxld_array_deinit(&context->objects);
217     for (i = 0; i < context->dependencies.maxitems; ++i) {
218         dep = kxld_array_get_slot(&context->dependencies, i);
221     kxld_array_deinit(&context->dependencies);
223     kxld_dict_deinit(&context->defined_symbols_by_name);
224     kxld_dict_deinit(&context->defined_cxx_symbols_by_value);
225     kxld_dict_deinit(&context->obsolete_symbols_by_name);
226     kxld_dict_deinit(&context->vtables_by_name);
228     kxld_free(context->kext, kxld_kext_sizeof());
229     kxld_free(context, sizeof(*context));
238     KXLDContext       * context,
258     require_action(context, finish, rval=KERN_INVALID_ARGUMENT);
266     rval = init_context(context, ndependencies);
269     rval = init_kext_objects(context, file, size, name,
273     linked_object = allocate_kext(context, callback_data,
277     rval = kxld_kext_relocate(context->kext, vmaddr,
278         &context->vtables_by_name,
279         &context->defined_symbols_by_name,
280         &context->obsolete_symbols_by_name,
281         &context->defined_cxx_symbols_by_value);
284     rval = kxld_kext_export_linked_object(context->kext,
297     clear_context(context);
306 init_context(KXLDContext *context, u_int ndependencies)
312     rval = kxld_array_init(&context->objects,
316     rval = kxld_array_init(&context->dependencies,
320     rval = kxld_dict_init(&context->defined_symbols_by_name,
324     rval = kxld_dict_init(&context->defined_cxx_symbols_by_value,
328     rval = kxld_dict_init(&context->obsolete_symbols_by_name,
332     rval = kxld_dict_init(&context->vtables_by_name, kxld_dict_string_hash,
344 init_kext_objects(KXLDContext *context, u_char *file, u_long size,
358         kext = kxld_array_get_item(&context->dependencies, i);
362         kext_object = get_object_for_file(context, dependencies[i].kext,
367             interface_object = get_object_for_file(context,
378                 &context->defined_symbols_by_name,
379                 &context->obsolete_symbols_by_name,
380                 &context->defined_cxx_symbols_by_value);
385                 &context->defined_cxx_symbols_by_value);
391     for (i = 0; i < context->dependencies.nitems; ++i) {
392         kext = kxld_array_get_item(&context->dependencies, i);
395             &context->defined_cxx_symbols_by_value,
396             &context->defined_symbols_by_name,
397             &context->vtables_by_name);
404     kext_object = get_object_for_file(context, file, size, name);
407     rval = kxld_kext_init(context->kext, kext_object, /* interface */ NULL);
410     rval = kxld_kext_export_symbols(context->kext,
412         &context->defined_cxx_symbols_by_value);
423 get_object_for_file(KXLDContext *context, u_char *file, u_long size,
431     for (i = 0; i < context->objects.nitems; ++i) {
432         object = kxld_array_get_item(&context->objects, i);
436                 context->section_order, context->cputype, context->cpusubtype, context->flags);
456 allocate_kext(KXLDContext *context, void *callback_data,
468     kxld_kext_get_vmsize(context->kext, &header_size, &vmsize);
469     vmaddr = context->allocate_callback(vmsize, &flags, callback_data);
484     kxld_kext_set_linked_object_size(context->kext, vmsize);
502 clear_context(KXLDContext *context)
508     check(context);
510     kxld_kext_clear(context->kext);
512     for (i = 0; i < context->objects.nitems; ++i) {
513         object = kxld_array_get_item(&context->objects, i);
516     kxld_array_reset(&context->objects);
518     for (i = 0; i < context->dependencies.nitems; ++i) {
519         dep = kxld_array_get_item(&context->dependencies, i);
522     kxld_array_reset(&context->dependencies);
524     kxld_dict_clear(&context->defined_symbols_by_name);
525     kxld_dict_clear(&context->defined_cxx_symbols_by_value);
526     kxld_dict_clear(&context->obsolete_symbols_by_name);
527     kxld_dict_clear(&context->vtables_by_name);