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#!/bin/sh
#
# Copyright The Mbed TLS Contributors
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Purpose
#
# This script determines ROM size (or code size) for the standard mbed TLS
# configurations, when built for a Cortex M3/M4 target.
#
# Configurations included:
# default include/mbedtls/config.h
# thread configs/config-thread.h
# suite-b configs/config-suite-b.h
# psk configs/config-ccm-psk-tls1_2.h
#
# Usage: footprint.sh
#
set -eu
CONFIG_H='include/mbedtls/config.h'
if [ -r $CONFIG_H ]; then :; else
echo "$CONFIG_H not found" >&2
echo "This script needs to be run from the root of" >&2
echo "a git checkout or uncompressed tarball" >&2
exit 1
fi
if grep -i cmake Makefile >/dev/null; then
echo "Not compatible with CMake" >&2
exit 1
fi
if which arm-none-eabi-gcc >/dev/null 2>&1; then :; else
echo "You need the ARM-GCC toolchain in your path" >&2
echo "See https://launchpad.net/gcc-arm-embedded/" >&2
exit 1
fi
ARMGCC_FLAGS='-Os -march=armv7-m -mthumb'
OUTFILE='00-footprint-summary.txt'
log()
{
echo "$@"
echo "$@" >> "$OUTFILE"
}
doit()
{
NAME="$1"
FILE="$2"
log ""
log "$NAME ($FILE):"
cp $CONFIG_H ${CONFIG_H}.bak
if [ "$FILE" != $CONFIG_H ]; then
cp "$FILE" $CONFIG_H
fi
{
scripts/config.py unset MBEDTLS_NET_C || true
scripts/config.py unset MBEDTLS_TIMING_C || true
scripts/config.py unset MBEDTLS_FS_IO || true
scripts/config.py --force set MBEDTLS_NO_PLATFORM_ENTROPY || true
} >/dev/null 2>&1
make clean >/dev/null
CC=arm-none-eabi-gcc AR=arm-none-eabi-ar LD=arm-none-eabi-ld \
CFLAGS="$ARMGCC_FLAGS" make lib >/dev/null
OUT="size-${NAME}.txt"
arm-none-eabi-size -t library/libmbed*.a > "$OUT"
log "$( head -n1 "$OUT" )"
log "$( tail -n1 "$OUT" )"
cp ${CONFIG_H}.bak $CONFIG_H
}
# truncate the file just this time
echo "(generated by $0)" > "$OUTFILE"
echo "" >> "$OUTFILE"
log "Footprint of standard configurations (minus net_sockets.c, timing.c, fs_io)"
log "for bare-metal ARM Cortex-M3/M4 microcontrollers."
VERSION_H="include/mbedtls/version.h"
MBEDTLS_VERSION=$( sed -n 's/.*VERSION_STRING *"\(.*\)"/\1/p' $VERSION_H )
if git rev-parse HEAD >/dev/null; then
GIT_HEAD=$( git rev-parse HEAD | head -c 10 )
GIT_VERSION=" (git head: $GIT_HEAD)"
else
GIT_VERSION=""
fi
log ""
log "mbed TLS $MBEDTLS_VERSION$GIT_VERSION"
log "$( arm-none-eabi-gcc --version | head -n1 )"
log "CFLAGS=$ARMGCC_FLAGS"
doit default include/mbedtls/config.h
doit thread configs/config-thread.h
doit suite-b configs/config-suite-b.h
doit psk configs/config-ccm-psk-tls1_2.h
zip mbedtls-footprint.zip "$OUTFILE" size-*.txt >/dev/null
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