#!/bin/bash

# NOTE: changes to the arch_syscall_table struct in syscalls.h will affect

#       this script/gperf - BEWARE!

###

# helper functions

function exit_usage() {

	echo "usage: $0 <syscall_csv_file> <gperf_template>"

	exit 1

}

###

# main

# sanity check

[[ ! -r "$1" || ! -r "$2" ]] && exit_usage

sys_csv=$1

gperf_tmpl=$2

sys_csv_tmp=$(mktemp -t generate_syscalls_XXXXXX)

# filter and prepare the syscall csv file

cat $sys_csv | grep -v '^#' | nl -ba -s, -v0 | \

    sed -e 's/^[[:space:]]\+\([0-9]\+\),\([^,]\+\),\(.*\)/\2,\1,\3/' \

        -e ':repeat; {s|\([^,]\+\)\(.*\)[^_]PNR|\1\2,__PNR_\1|g;}; t repeat' \

         > $sys_csv_tmp

[[ $? -ne 0 ]] && exit 1

# create the gperf file

sed -e "/@@SYSCALLS_TABLE@@/r $sys_csv_tmp" \

    -e '/@@SYSCALLS_TABLE@@/d' \

    $gperf_tmpl > syscalls.perf

[[ $? -ne 0 ]] && exit 1

# cleanup

rm -f $sys_csv_tmp

exit 0