first usable version of kernel and commands

After an year of hard work, this is a first "usable" version of Jehanne.

sys/include/trace.h

@@ -0,0 +1,35 @@
+/*
+ * This file is part of the UCB release of Plan 9. It is subject to the license
+ * terms in the LICENSE file found in the top-level directory of this
+ * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
+ * part of the UCB release of Plan 9, including this file, may be copied,
+ * modified, propagated, or distributed except according to the terms contained
+ * in the LICENSE file.
+ */
+
+typedef enum Tevent {
+	SAdmit = 0,	/* Edf admit */
+	SRelease,	/* Edf release, waiting to be scheduled */
+	SEdf,		/* running under EDF */
+	SRun,		/* running best effort */
+	SReady,		/* runnable but not running  */
+	SSleep,		/* blocked */
+	SYield,		/* blocked waiting for release */
+	SSlice,		/* slice exhausted */
+	SDeadline,	/* proc's deadline */
+	SExpel,		/* Edf expel */
+	SDead,		/* proc dies */
+	SInts,		/* Interrupt start */
+	SInte,		/* Interrupt end */
+	SUser,		/* user event */
+	SLock,		/* blocked on a queue or lock */
+	Nevent,
+} Tevent;
+
+typedef struct Traceevent	Traceevent;
+struct Traceevent {
+	uint32_t	pid;	
+	uint32_t	etype;	/* Event type */
+	int64_t	time;	/* time stamp  */
+	uint32_t	core;	/* core number */
+};