stable_storage
extern struct stable_storage sstor;
offsetof(struct stable_storage, ss_console)
(offsetof(struct stable_storage, ss_console) + \
offsetof(struct stable_storage, ss_keyboard)
(offsetof(struct stable_storage, ss_keyboard) + \
extern struct stable_storage sstor; /* contents of Stable Storage */
struct stable_storage sstor; /* contents of Stable Storage */