projects/linux·blob v6.2-rc2 · refs

74 lines · 1.5 KiB

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)
15set -e
16
17usage() {
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
30abis=
31prefix=
32
33while [ $# -gt 0 ]
34do
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
48done
49
50if [ $# -ne 2 ]; then
51 usage
52fi
53
54infile="$1"
55outfile="$2"
56
57guard=_ASM_$(basename "$outfile" |
58 sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
59 -e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g')
60
61grep -E "^[0-9A-Fa-fXx]+[[:space:]]+$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"