uintptr_t ustack_top;
struct llist_header siblings;
struct llist_header children;
+ struct llist_header grp_member;
struct proc_mm mm;
void* page_table;
time_t created;
sigset_t sig_pending;
sigset_t sig_mask;
void* sig_handler[_SIG_NUM];
+ pid_t pgid;
struct lx_timer* timer;
};