PT_OPT_FLAG_SHIFT   26 include/linux/ptrace.h #define PT_EVENT_FLAG(event)	(1 << (PT_OPT_FLAG_SHIFT + (event)))
PT_OPT_FLAG_SHIFT   36 include/linux/ptrace.h #define PT_EXITKILL		(PTRACE_O_EXITKILL << PT_OPT_FLAG_SHIFT)