+#define PT_TRACE_ME 0 /* child declares it's being traced */
+#define PT_READ_I 1 /* read word in child's I space */
+#define PT_READ_D 2 /* read word in child's D space */
+#define PT_READ_U 3 /* read word in child's user structure */
+#define PT_WRITE_I 4 /* write word in child's I space */
+#define PT_WRITE_D 5 /* write word in child's D space */
+#define PT_WRITE_U 6 /* write word in child's user structure */
+#define PT_CONTINUE 7 /* continue the child */
+#define PT_KILL 8 /* kill the child process */
+#define PT_STEP 9 /* single step the child */
+#define PT_ATTACH ePtAttachDeprecated /* trace some running process */
+#define PT_DETACH 11 /* stop tracing a process */
+#define PT_SIGEXC 12 /* signals as exceptions for current_proc */
+#define PT_THUPDATE 13 /* signal for thread# */
+#define PT_ATTACHEXC 14 /* attach to running process with signal exception */