+#define HDR_PROCESS 0
+#define HDR_ES 1
+#define HDR_USER_STACK 2
+#define HDR_USERTRACE 3
+#define HDR_PROCESS_STATE 4
+#define HDR_CPU 5
+#define HDR_TRACEFILE 6
+#define HDR_TRACESET 7
+#define HDR_TRACE 8
+#define HDR_QUARKS 9
+#define HDR_QUARK 10
+
+/* Device number manipulation macros from kernel source */
+#define MINORBITS 20
+#define MINORMASK ((1U << MINORBITS) - 1)
+#define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS))
+#define MINOR(dev) ((unsigned int) ((dev) & MINORMASK))
+#define MKDEV(ma,mi) (((ma) << MINORBITS) | (mi))
+