Use "nm | awk ..." instead of genassym(1) to generate symbol value headers.

Symbol values are now represented using array sizes (4 arrays per symbol
so that 16-bit machines can represent 64-bit values) instead of being raw
binary values.

Reviewed by:	marcel

1 files changed, 53 insertions, 0 deletions

diff --git a/sys/kern/genassym.sh b/sys/kern/genassym.sh
new file mode 100644
index 0000000..071ddb0
--- /dev/null
+++ b/sys/kern/genassym.sh
@@ -0,0 +1,53 @@
+#!/bin/sh
+# $FreeBSD$
+
+# Grrr, this should use stdin and stdout, but is encrufted for compatibility.
+
+usage() {
+	echo "usage: genassym [-o outfile] objfile"
+	exit 1
+}
+
+outfile=/dev/stdout
+while getopts "o:" option
+do
+	case "$option" in
+	o)	outfile="$OPTARG";;
+	*)	usage;;
+	esac
+done
+shift $(($OPTIND - 1))
+case $# in
+1)	;;
+*)	usage;;
+esac
+
+nm "$1" | awk '
+/ C .*sign$/ {
+	sign = substr($1, length($1) - 3, 4)
+	sub("^0*", "", sign)
+	if (sign != "")
+		sign = "-"
+}
+/ C .*w0$/ {
+	w0 = substr($1, length($1) - 3, 4)
+}
+/ C .*w1$/ {
+	w1 = substr($1, length($1) - 3, 4)
+}
+/ C .*w2$/ {
+	w2 = substr($1, length($1) - 3, 4)
+}
+/ C .*w3$/ {
+	w3 = substr($1, length($1) - 3, 4)
+	w = w3 w2 w1 w0
+	sub("^0*", "", w)
+	if (w == "")
+		w = "0"
+	sub("w3$", "", $3)
+	# This still has minor problems representing INT_MIN, etc.  E.g.,
+	# with 32-bit 2''s complement ints, this prints -0x80000000, which 
+	# has the wrong type (unsigned int).
+	printf("#define\t%s\t%s0x%s\n", $3, sign, w)
+}
+' 3>"$outfile" >&3 3>&-