#define PT_STEP 9 /* single step the child */
#define PT_ATTACH 10 /* trace some running process */
#define PT_DETACH 11 /* stop tracing a process */
+#define PT_DENY_ATTACH 31
#define PT_FIRSTMACH 32 /* for machine-specific requests */
#include <machine/ptrace.h> /* machine-specific requests, if any */