275 	struct btf *base_btf;  member
501 	return btf->start_id + (btf->base_btf ? 0 : 1);  in btf_start_id()
539 	return btf->kernel_btf && !btf->base_btf;  in btf_is_vmlinux()
548 		btf = btf->base_btf;  in btf_nr_types()
608 	const struct btf *base_btf = btf;  in btf_named_start_id()  local
610 	while (!own && base_btf->base_btf)  in btf_named_start_id()
611 		base_btf = base_btf->base_btf;  in btf_named_start_id()
613 	return base_btf->named_start_id ?: (base_btf->start_id ?: 1);  in btf_named_start_id()
642 	const struct btf *base_btf = btf_base_btf(btf);  in btf_find_by_name_kind()  local
647 	if (base_btf) {  in btf_find_by_name_kind()
648 		id = btf_find_by_name_kind(base_btf, name, kind);  in btf_find_by_name_kind()
873 		btf = btf->base_btf;  in btf_name_offset_valid()
892 		btf = btf->base_btf;  in btf_str_by_offset()
962 		btf = btf->base_btf;  in btf_type_by_id()
1580 		if (env->btf->base_btf && IS_ENABLED(CONFIG_MODULE_ALLOW_BTF_MISMATCH))  in __btf_verifier_log_type()
1626 		if (env->btf->base_btf && IS_ENABLED(CONFIG_MODULE_ALLOW_BTF_MISMATCH))  in btf_verifier_log_member()
1738 			if (!btf->base_btf) {  in btf_add_type()
1896 	return btf->base_btf;  in btf_base_btf()
1904 void btf_set_base_btf(struct btf *btf, const struct btf *base_btf)  in btf_set_base_btf()  argument
1906 	btf->base_btf = (struct btf *)base_btf;  in btf_set_base_btf()
1907 	btf->start_id = btf_nr_types(base_btf);  in btf_set_base_btf()
1908 	btf->start_str_off = base_btf->hdr.str_len;  in btf_set_base_btf()
2142 		btf = btf->base_btf;  in btf_resolved_type_id()
2158 		btf = btf->base_btf;  in btf_resolved_type_size()
5362 	env->log_type_id = btf->base_btf ? btf->start_id : 1;  in btf_check_all_metas()
5465 	for (i = btf->base_btf ? 0 : 1; i < btf->nr_types; i++) {  in btf_check_all_types()
5498 	if (!env->btf->base_btf && !hdr->type_len) {  in btf_parse_type_sec()
5527 	if (btf->base_btf && !hdr->str_len)  in btf_parse_str_sec()
5533 	if (!btf->base_btf && start[0]) {  in btf_parse_str_sec()
5663 	if (!btf->base_btf && btf_data_size == hdr->hdr_len) {  in btf_parse_hdr()
6396 	if (!btf->base_btf || !btf->base_id_map)  in btf_relocate_id()
6407 	struct btf *btf = NULL, *vmlinux_btf, *base_btf = NULL;  in btf_parse_module()  local
6426 		base_btf = btf_parse_base(env, ".BTF.base", base_data, base_data_size);  in btf_parse_module()
6427 		if (IS_ERR(base_btf)) {  in btf_parse_module()
6428 			err = PTR_ERR(base_btf);  in btf_parse_module()
6432 		base_btf = vmlinux_btf;  in btf_parse_module()
6442 	btf->base_btf = base_btf;  in btf_parse_module()
6443 	btf->start_id = base_btf->nr_types;  in btf_parse_module()
6444 	btf->start_str_off = base_btf->hdr.str_len;  in btf_parse_module()
6470 	err = btf_check_type_tags(env, btf, btf_nr_types(base_btf));  in btf_parse_module()
6474 	if (base_btf != vmlinux_btf) {  in btf_parse_module()
6478 		btf_free(base_btf);  in btf_parse_module()
6479 		base_btf = vmlinux_btf;  in btf_parse_module()
6489 	if (!IS_ERR(base_btf) && base_btf != vmlinux_btf)  in btf_parse_module()
6490 		btf_free(base_btf);  in btf_parse_module()