1#!/bin/sh
2#
3# Copyright The Mbed TLS Contributors
4# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
5#
6# Purpose
7#
8# This script determines ROM size (or code size) for the standard Mbed TLS
9# configurations, when built for a Cortex M3/M4 target.
10#
11# Configurations included:
12#   default    include/mbedtls/mbedtls_config.h
13#   thread     configs/config-thread.h
14#   suite-b    configs/config-suite-b.h
15#   psk        configs/config-ccm-psk-tls1_2.h
16#
17# Usage: footprint.sh
18#
19set -eu
20
21CONFIG_H='include/mbedtls/mbedtls_config.h'
22
23if [ -r $CONFIG_H ]; then :; else
24    echo "$CONFIG_H not found" >&2
25    echo "This script needs to be run from the root of" >&2
26    echo "a git checkout or uncompressed tarball" >&2
27    exit 1
28fi
29
30if grep -i cmake Makefile >/dev/null; then
31    echo "Not compatible with CMake" >&2
32    exit 1
33fi
34
35if which arm-none-eabi-gcc >/dev/null 2>&1; then :; else
36    echo "You need the ARM-GCC toolchain in your path" >&2
37    echo "See https://launchpad.net/gcc-arm-embedded/" >&2
38    exit 1
39fi
40
41ARMGCC_FLAGS='-Os -march=armv7-m -mthumb'
42OUTFILE='00-footprint-summary.txt'
43
44log()
45{
46    echo "$@"
47    echo "$@" >> "$OUTFILE"
48}
49
50doit()
51{
52    NAME="$1"
53    FILE="$2"
54
55    log ""
56    log "$NAME ($FILE):"
57
58    cp $CONFIG_H ${CONFIG_H}.bak
59    if [ "$FILE" != $CONFIG_H ]; then
60        cp "$FILE"  $CONFIG_H
61    fi
62
63    {
64        scripts/config.py unset MBEDTLS_NET_C || true
65        scripts/config.py unset MBEDTLS_TIMING_C || true
66        scripts/config.py unset MBEDTLS_FS_IO || true
67        scripts/config.py --force set MBEDTLS_NO_PLATFORM_ENTROPY || true
68    } >/dev/null 2>&1
69
70    make clean >/dev/null
71    CC=arm-none-eabi-gcc AR=arm-none-eabi-ar LD=arm-none-eabi-ld \
72        CFLAGS="$ARMGCC_FLAGS" make lib >/dev/null
73
74    OUT="size-${NAME}.txt"
75    arm-none-eabi-size -t library/libmbed*.a > "$OUT"
76    log "$( head -n1 "$OUT" )"
77    log "$( tail -n1 "$OUT" )"
78
79    cp ${CONFIG_H}.bak $CONFIG_H
80}
81
82# truncate the file just this time
83echo "(generated by $0)" > "$OUTFILE"
84echo "" >> "$OUTFILE"
85
86log "Footprint of standard configurations (minus net_sockets.c, timing.c, fs_io)"
87log "for bare-metal ARM Cortex-M3/M4 microcontrollers."
88
89VERSION_H="include/mbedtls/version.h"
90MBEDTLS_VERSION=$( sed -n 's/.*VERSION_STRING *"\(.*\)"/\1/p' $VERSION_H )
91if git rev-parse HEAD >/dev/null; then
92    GIT_HEAD=$( git rev-parse HEAD | head -c 10 )
93    GIT_VERSION=" (git head: $GIT_HEAD)"
94else
95    GIT_VERSION=""
96fi
97
98log ""
99log "Mbed TLS $MBEDTLS_VERSION$GIT_VERSION"
100log "$( arm-none-eabi-gcc --version | head -n1 )"
101log "CFLAGS=$ARMGCC_FLAGS"
102
103doit default    include/mbedtls/mbedtls_config.h
104doit thread     configs/config-thread.h
105doit suite-b    configs/config-suite-b.h
106doit psk        configs/config-ccm-psk-tls1_2.h
107
108zip mbedtls-footprint.zip "$OUTFILE" size-*.txt >/dev/null
109