1#!/bin/sh
2#
3# Copyright The Mbed TLS Contributors
4# SPDX-License-Identifier: Apache-2.0
5#
6# Licensed under the Apache License, Version 2.0 (the "License"); you may
7# not use this file except in compliance with the License.
8# You may obtain a copy of the License at
9#
10# http://www.apache.org/licenses/LICENSE-2.0
11#
12# Unless required by applicable law or agreed to in writing, software
13# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
14# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15# See the License for the specific language governing permissions and
16# limitations under the License.
17#
18# Purpose
19#
20# This script determines ROM size (or code size) for the standard mbed TLS
21# configurations, when built for a Cortex M3/M4 target.
22#
23# Configurations included:
24#   default    include/mbedtls/mbedtls_config.h
25#   thread     configs/config-thread.h
26#   suite-b    configs/config-suite-b.h
27#   psk        configs/config-ccm-psk-tls1_2.h
28#
29# Usage: footprint.sh
30#
31set -eu
32
33CONFIG_H='include/mbedtls/mbedtls_config.h'
34
35if [ -r $CONFIG_H ]; then :; else
36    echo "$CONFIG_H not found" >&2
37    echo "This script needs to be run from the root of" >&2
38    echo "a git checkout or uncompressed tarball" >&2
39    exit 1
40fi
41
42if grep -i cmake Makefile >/dev/null; then
43    echo "Not compatible with CMake" >&2
44    exit 1
45fi
46
47if which arm-none-eabi-gcc >/dev/null 2>&1; then :; else
48    echo "You need the ARM-GCC toolchain in your path" >&2
49    echo "See https://launchpad.net/gcc-arm-embedded/" >&2
50    exit 1
51fi
52
53ARMGCC_FLAGS='-Os -march=armv7-m -mthumb'
54OUTFILE='00-footprint-summary.txt'
55
56log()
57{
58    echo "$@"
59    echo "$@" >> "$OUTFILE"
60}
61
62doit()
63{
64    NAME="$1"
65    FILE="$2"
66
67    log ""
68    log "$NAME ($FILE):"
69
70    cp $CONFIG_H ${CONFIG_H}.bak
71    if [ "$FILE" != $CONFIG_H ]; then
72        cp "$FILE"  $CONFIG_H
73    fi
74
75    {
76        scripts/config.py unset MBEDTLS_NET_C || true
77        scripts/config.py unset MBEDTLS_TIMING_C || true
78        scripts/config.py unset MBEDTLS_FS_IO || true
79        scripts/config.py --force set MBEDTLS_NO_PLATFORM_ENTROPY || true
80    } >/dev/null 2>&1
81
82    make clean >/dev/null
83    CC=arm-none-eabi-gcc AR=arm-none-eabi-ar LD=arm-none-eabi-ld \
84        CFLAGS="$ARMGCC_FLAGS" make lib >/dev/null
85
86    OUT="size-${NAME}.txt"
87    arm-none-eabi-size -t library/libmbed*.a > "$OUT"
88    log "$( head -n1 "$OUT" )"
89    log "$( tail -n1 "$OUT" )"
90
91    cp ${CONFIG_H}.bak $CONFIG_H
92}
93
94# truncate the file just this time
95echo "(generated by $0)" > "$OUTFILE"
96echo "" >> "$OUTFILE"
97
98log "Footprint of standard configurations (minus net_sockets.c, timing.c, fs_io)"
99log "for bare-metal ARM Cortex-M3/M4 microcontrollers."
100
101VERSION_H="include/mbedtls/version.h"
102MBEDTLS_VERSION=$( sed -n 's/.*VERSION_STRING *"\(.*\)"/\1/p' $VERSION_H )
103if git rev-parse HEAD >/dev/null; then
104    GIT_HEAD=$( git rev-parse HEAD | head -c 10 )
105    GIT_VERSION=" (git head: $GIT_HEAD)"
106else
107    GIT_VERSION=""
108fi
109
110log ""
111log "mbed TLS $MBEDTLS_VERSION$GIT_VERSION"
112log "$( arm-none-eabi-gcc --version | head -n1 )"
113log "CFLAGS=$ARMGCC_FLAGS"
114
115doit default    include/mbedtls/mbedtls_config.h
116doit thread     configs/config-thread.h
117doit suite-b    configs/config-suite-b.h
118doit psk        configs/config-ccm-psk-tls1_2.h
119
120zip mbedtls-footprint.zip "$OUTFILE" size-*.txt >/dev/null
121