New profile protocol

- when kernel profiles a process for the first time it saves an entry
  describing the process [endpoint|name]

- every profile sample is only [endpoint|pc]

- profile utility creates a table of endpoint <-> name relations and
  translates endpoints of samples into names and writing out the
  results to comply with the processing tools

- "task" endpoints like KERNEL are negative thus we must cast it to
  unsigned when hashing

include/minix/profile.h

@@ -2,6 +2,7 @@
 #define _PROFILE_H
 
 #include <ansi.h>
+#include <minix/type.h>
 
 /*
  * Types relating to system profiling.  Types are supplied for both
@@ -23,10 +24,15 @@ struct sprof_info_s {
 } sprof_info_inst;
 
 /* What a profiling sample looks like (used for sizeof()). */
-struct {
-  char name[8];
-  int pc;
-} sprof_sample;
+struct sprof_sample {
+	endpoint_t	proc;
+	void *		pc;
+};
+
+struct sprof_proc {
+	endpoint_t	proc;
+	char		name[8];
+}i;
 
 #endif /* SPROFILE */