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" 75