FreeBSD/Linux Kernel Cross Reference
sys/kern/genassym.sh
1 #!/bin/sh
2 # $FreeBSD: src/sys/kern/genassym.sh,v 1.4 2002/02/11 03:54:30 obrien Exp $
3
4 # Grrr, this should use stdin and stdout, but is encrufted for compatibility.
5
6 usage()
7 {
8 echo "usage: genassym [-o outfile] objfile"
9 exit 1
10 }
11
12 outfile=/dev/stdout
13 while getopts "o:" option
14 do
15 case "$option" in
16 o) outfile="$OPTARG";;
17 *) usage;;
18 esac
19 done
20 shift $(($OPTIND - 1))
21 case $# in
22 1) ;;
23 *) usage;;
24 esac
25
26 ${NM:='nm'} "$1" | ${AWK:='awk'} '
27 / C .*sign$/ {
28 sign = substr($1, length($1) - 3, 4)
29 sub("^0*", "", sign)
30 if (sign != "")
31 sign = "-"
32 }
33 / C .*w0$/ {
34 w0 = substr($1, length($1) - 3, 4)
35 }
36 / C .*w1$/ {
37 w1 = substr($1, length($1) - 3, 4)
38 }
39 / C .*w2$/ {
40 w2 = substr($1, length($1) - 3, 4)
41 }
42 / C .*w3$/ {
43 w3 = substr($1, length($1) - 3, 4)
44 w = w3 w2 w1 w0
45 sub("^0*", "", w)
46 if (w == "")
47 w = "0"
48 sub("w3$", "", $3)
49 # This still has minor problems representing INT_MIN, etc. E.g.,
50 # with 32-bit 2''s complement ints, this prints -0x80000000, which
51 # has the wrong type (unsigned int).
52 printf("#define\t%s\t%s0x%s\n", $3, sign, w)
53 }
54 ' 3>"$outfile" >&3 3>&-
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