1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0-only
3 #
4 # Generate a syscall number header.
5 #
6 # Each line of the syscall table should have the following format:
7 #
8 # NR ABI NAME [NATIVE] [COMPAT]
9 #
10 # NR syscall number
11 # ABI ABI name
12 # NAME syscall name
13 # NATIVE native entry point (optional)
14 # COMPAT compat entry point (optional)
15 set -e
16
17 usage() {
18 echo >&2 "usage: $0 [--abis ABIS] [--prefix PREFIX] INFILE OUTFILE" >&2
19 echo >&2
20 echo >&2 " INFILE input syscall table"
21 echo >&2 " OUTFILE output header file"
22 echo >&2
23 echo >&2 "options:"
24 echo >&2 " --abis ABIS ABI(s) to handle (By default, all lines are handled)"
25 echo >&2 " --prefix PREFIX The prefix to the macro like __NR_<PREFIX><NAME>"
26 exit 1
27 }
28
29 # default unless specified by options
30 abis=
31 prefix=
32
33 while [ $# -gt 0 ]
34 do
35 case $1 in
36 --abis)
37 abis=$(echo "($2)" | tr ',' '|')
38 shift 2;;
39 --prefix)
40 prefix=$2
41 shift 2;;
42 -*)
43 echo "$1: unknown option" >&2
44 usage;;
45 *)
46 break;;
47 esac
48 done
49
50 if [ $# -ne 2 ]; then
51 usage
52 fi
53
54 infile="$1"
55 outfile="$2"
56
57 guard=_ASM_$(basename "$outfile" |
58 sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
59 -e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g')
60
61 grep -E "^[0-9A-Fa-fXx]+[[:space:]]+$abis" "$infile" | sort -n | {
62 echo "#ifndef $guard"
63 echo "#define $guard"
64 echo
65
66 max=0
67 while read nr abi name native compat ; do
68 max=$nr
69 done
70
71 echo "#define __NR_${prefix}syscalls $(($max + 1))"
72 echo
73 echo "#endif /* $guard */"
74 } > "$outfile"
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