1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0-only 3# 4# Generate a syscall table 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 16set -e 17 18usage() { 19 echo >&2 "usage: $0 [--abis ABIS] INFILE OUTFILE" >&2 20 echo >&2 21 echo >&2 " INFILE input syscall table" 22 echo >&2 " OUTFILE output header file" 23 echo >&2 24 echo >&2 "options:" 25 echo >&2 " --abis ABIS ABI(s) to handle (By default, all lines are handled)" 26 exit 1 27} 28 29# default unless specified by options 30abis= 31 32while [ $# -gt 0 ] 33do 34 case $1 in 35 --abis) 36 abis=$(echo "($2)" | tr ',' '|') 37 shift 2;; 38 -*) 39 echo "$1: unknown option" >&2 40 usage;; 41 *) 42 break;; 43 esac 44done 45 46if [ $# -ne 2 ]; then 47 usage 48fi 49 50infile="$1" 51outfile="$2" 52 53nxt=0 54 55grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | { 56 57 while read nr abi name native compat noreturn; do 58 59 if [ $nxt -gt $nr ]; then 60 echo "error: $infile: syscall table is not sorted or duplicates the same syscall number" >&2 61 exit 1 62 fi 63 64 while [ $nxt -lt $nr ]; do 65 echo "__SYSCALL($nxt, sys_ni_syscall)" 66 nxt=$((nxt + 1)) 67 done 68 69 if [ "$compat" = "-" ]; then 70 unset compat 71 fi 72 73 if [ -n "$noreturn" ]; then 74 if [ "$noreturn" != "noreturn" ]; then 75 echo "error: $infile: invalid string \"$noreturn\" in 'noreturn' column" 76 exit 1 77 fi 78 if [ -n "$compat" ]; then 79 echo "__SYSCALL_COMPAT_NORETURN($nr, $native, $compat)" 80 else 81 echo "__SYSCALL_NORETURN($nr, $native)" 82 fi 83 elif [ -n "$compat" ]; then 84 echo "__SYSCALL_WITH_COMPAT($nr, $native, $compat)" 85 elif [ -n "$native" ]; then 86 echo "__SYSCALL($nr, $native)" 87 else 88 echo "__SYSCALL($nr, sys_ni_syscall)" 89 fi 90 nxt=$((nr + 1)) 91 done 92} > "$outfile" 93