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#!/bin/bash
#
# Copyright 2021 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# compare local tree Cr50 source files with a different git branch.
#
# This script is supposed to run in a Cr50 source tree. The script will remove
# and rebuild Cr50 image, then scan the .o and .d files in the build directory
# to figure out all *.[cSh] files used to build the image.
#
# Once the list of files is created, all files' contents are compared with a
# different git branch. By default the other branch is
# cros/firmware-cr50-9308.B, it can be changed as a command line argument
# passed to this script.
tmpf="/tmp/bcmp.$$"
trap '{ rm -f "${tmpf}" ; }' EXIT
default_compare_to="cros/firmware-cr50-stab-14294.B"
find_src_file() {
local f="$1"
local log="$2"
if [[ -f ${f} ]]; then
echo "${cr50_dir} ${f}" >> "${log}"
return
fi
g="${f/\.c/.S}"
if [[ "${g}" != "${f}" ]]; then
# Could be an assembler source file.
if [[ -f ${g} ]]; then
echo "${cr50_dir} ${g}" >> "${log}"
return
fi
fi
g="${f#board/cr50/}"
if [[ -f ${tpm2_dir}/${g} ]]; then
echo "${tpm2_dir} ${f}" >> "${log}"
return
fi
case "${f}" in
(*dcrypto/fips_module* | *linkedtpm2*) ;;
(*) echo "neither ${f} nor ${g} found in the trees" >&2
esac
}
branch_exists() {
local tree="$1"
local branch="$2"
git -C "${tree}" show-branch "${branch}" > /dev/null 2>&1
}
if [[ ! -f Makefile.rules || ! -f board/cr50/board.h ]]; then
echo "this script must run in the root ec directory" >&2
exit 1
fi
if [[ "$#" != 0 ]]; then
compare_to="$1"
else
compare_to="${default_compare_to}"
fi
cr50_dir="$(pwd)"
tpm2_dir="$(readlink -f ../../third_party/tpm2/)"
if ! branch_exists "${tpm2_dir}" "${compare_to}"; then
echo "Branch ${compare_to} not found in ${tpm2_dir}" >&2
exit 1
fi
cr50_compare_to="${compare_to}"
if ! branch_exists "${cr50_dir}" "${cr50_compare_to}"; then
# This could be a new branch with mangled name.
cr50_compare_to="${cr50_compare_to}-cr50_stab"
if ! branch_exists "${cr50_dir}" "${cr50_compare_to}"; then
echo "Branch ${compare_to} not found in ${cr50_dir}" >&2
exit 1
fi
fi
echo "Will rebuild CR50"
if ! make BOARD=cr50 -j > /dev/null ; then
echo "building cr50 failed" >&2
exit 1
fi
echo "Now checking .c and .S files"
for f in $(find build/cr50/RW/ -name '*.o' |
sed 's|build/cr50/RW/||;s/\.o/.c/'); do
find_src_file "${f}" "${tmpf}"
done
echo "Now checking .h files"
for f in $(find build/cr50/RW/ -name '*.d' -exec cat {} + |
sed 's/ /\n/g' |
sed 's^/mnt/host/source/src/platform/\(ec\|cr50\)/^^' |
sed 's^/mnt/host/source/src/third_party/tpm2/^^' |
sed 's/:$//'|
sort -u |
grep '\.h$' ); do
find_src_file "${f}" "${tmpf}"
done
sort "${tmpf}" | while read -r dir file; do
if [[ ${dir} == */cr50 ]]; then
branch="${cr50_compare_to}"
else
branch="${compare_to}"
# TPM2 .o files are placed in board/cr50 in the build directory. Strip the
# prefix so that the matching .c file can be found in the TPM2 root.
file="${file#board/cr50/}"
fi
if ! git -C "${dir}" diff "${branch}" "${file}" 2>/dev/null; then
echo "Problems comparing ${file}, does it exist in ${branch} in ${dir}?" >&2
fi
done
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