get_var
mode = efi_get_secureboot_mode(get_var);
enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var)
status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size,
get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode);