#!/bin/sh# SPDX-License-Identifier: GPL-2.0-only## Generate a syscall table header.## Each line of the syscall table should have the following format:## NR ABI NAME [NATIVE] [COMPAT]## NR       syscall number# ABI      ABI name# NAME     syscall name# NATIVE   native entry point (optional)# COMPAT   compat entry point (optional) set -e usage() {	echo >&2 "usage: $0 [--abis ABIS] INFILE OUTFILE" >&2	echo >&2	echo >&2 "  INFILE    input syscall table"	echo >&2 "  OUTFILE   output header file"	echo >&2	echo >&2 "options:"	echo >&2 "  --abis ABIS        ABI(s) to handle (By default, all lines are handled)"	exit 1} # default unless specified by optionsabis= while [ $# -gt 0 ]do	case $1 in	--abis)		abis=$(echo "($2)" | tr ',' '|')		shift 2;;	-*)		echo "$1: unknown option" >&2		usage;;	*)		break;;	esacdone if [ $# -ne 2 ]; then	usagefi infile="$1"outfile="$2" nxt=0 grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | { 	while read nr abi name native compat noreturn; do 		if [ $nxt -gt $nr ]; then			echo "error: $infile: syscall table is not sorted or duplicates the same syscall number" >&2			exit 1		fi 		while [ $nxt -lt $nr ]; do			echo "__SYSCALL($nxt, sys_ni_syscall)"			nxt=$((nxt + 1))		done 		if [ "$compat" = "-" ]; then			unset compat		fi 		if [ -n "$noreturn" ]; then			if [ "$noreturn" != "noreturn" ]; then				echo "error: $infile: invalid string \"$noreturn\" in 'noreturn' column"				exit 1			fi			if [ -n "$compat" ]; then				echo "__SYSCALL_COMPAT_NORETURN($nr, $native, $compat)"			else				echo "__SYSCALL_NORETURN($nr, $native)"			fi		elif [ -n "$compat" ]; then			echo "__SYSCALL_WITH_COMPAT($nr, $native, $compat)"		elif [ -n "$native" ]; then			echo "__SYSCALL($nr, $native)"		else			echo "__SYSCALL($nr, sys_ni_syscall)"		fi		nxt=$((nr + 1))	done} > "$outfile"