1 files changed, 120 insertions, 0 deletions
diff --git a/scripts/footprint.sh b/scripts/footprint.sh
new file mode 100755
index 000000000..6c0fc2554
--- /dev/null
+++ b/scripts/footprint.sh
@@ -0,0 +1,120 @@
+#!/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/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/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/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