Add kernxref, a shellscript to crossreference the symbols of the LINT kernel.

tools/tools/README

@@ -4,3 +4,5 @@ A tool is something which is sometimes useful, and doesn't fit any of the
 other categories.
 
 Please make a subdir per program, and add a brief description to this file.
+
+kernxref	Shellscript to cross reference symbols in the LINT kernel.

tools/tools/kernxref/kernxref.sh

@@ -0,0 +1,73 @@
+:
+#
+# ----------------------------------------------------------------------------
+# "THE BEER-WARE LICENSE" (Revision 42):
+# <phk@login.dknet.dk> wrote this file.  As long as you retain this notice you
+# can do whatever you want with this stuff. If we meet some day, and you think
+# this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
+# ----------------------------------------------------------------------------
+#
+# $Id$
+#
+# This shellscript will make a cross reference of the symbols of the LINT 
+# kernell.
+
+cd /sys/compile/LINT
+nm -gon *.o /sys/libkern/obj/*.o /lkm/* | tr : ' ' | awk '
+NF > 1	{
+	if (length($2) == 8) {
+		$2 = $3
+		$3 = $4
+	}
+	if ($2 == "t") 
+		next
+	if ($2 == "F")
+		next
+	nm[$3]++
+	if ($2 == "U") {
+		ref[$3]=ref[$3]" "$1
+	} else if ($2 == "T" || $2 == "D" || $2 == "A") {
+		if (def[$3] != "")
+			def[$3]=def[$3]","$1
+		else
+			def[$3]=$1
+	} else if ($2 == "?") {
+		if (def[$3] == "S")
+			i++
+		else if (def[$3] != "")
+			def[$3]=def[$3]",S"
+		else
+			def[$3]="S"
+		ref[$3]=ref[$3]" "$1
+	} else if ($2 == "C") {
+		if (def[$3] == $2)
+			i++
+		else if (def[$3] != "")
+			def[$3]=def[$3]",C"
+		else
+			def[$3]="C"
+		ref[$3]=ref[$3]" "$1
+	} else {
+		print ">>>",$0
+	}
+	}
+END	{
+	for (i in nm) {
+		printf "%s {%s} %s\n",i,def[i],ref[i]
+	}
+	}
+' | sort | awk '
+	{
+	if ($2 == "{S}")
+		$2 = "<Linker set>"
+	if ($2 == "{C}")
+		$2 = "<Common symbol>"
+	if (length($3) == 0) {
+		printf "%-30s %s UNREF\n",$1,$2
+	} else if ($2 == "{}") {
+		printf "%-30s {UNDEF}\n",$1
+	} else {
+		printf "%-30s %s\n\t%s\n",$1,$2,$3
+	}
+	}
+'