#!/bin/sh # SPDX-License-Identifier: GPL-2.0-only # # Generate a syscall number 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] [--prefix PREFIX] 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)" echo >&2 " --prefix PREFIX The prefix to the macro like __NR_" exit 1 } # default unless specified by options abis= prefix= while [ $# -gt 0 ] do case $1 in --abis) abis=$(echo "($2)" | tr ',' '|') shift 2;; --prefix) prefix=$2 shift 2;; -*) echo "$1: unknown option" >&2 usage;; *) break;; esac done if [ $# -ne 2 ]; then usage fi infile="$1" outfile="$2" guard=_ASM_$(basename "$outfile" | sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \ -e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g') grep -E "^[0-9A-Fa-fXx]+[[:space:]]+$abis" "$infile" | sort -n | { echo "#ifndef $guard" echo "#define $guard" echo max=0 while read nr abi name native compat ; do max=$nr done echo "#define __NR_${prefix}syscalls $(($max + 1))" echo echo "#endif /* $guard */" } > "$outfile"