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#!/bin/bash
EINVAL=22
THIS_SCRIPT_NAME=$(basename "$0")
function log_info
{
echo "$THIS_SCRIPT_NAME: $@"
}
function log_warning
{
echo "$THIS_SCRIPT_NAME: warning: $@"
}
function log_error
{
echo "$THIS_SCRIPT_NAME: error: $@"
}
function print_help
{
cat <<-ENDHELP
$THIS_SCRIPT_NAME: options...
\toptions:
\t\t--map=*path where to put SnapAPI System.map file*
\t\t--kver=*kernel version to build SnapAPI for*
\t\t--buildsystem -- indicate that we are building SnapAPI on Cyberprotect buildsystem
ENDHELP
}
IS_BUILDSYSTEM_BUILD=false
for argument in "$@"; do
case "$argument" in
--map=*)
TARGET_SYSTEM_MAP_PATH="${argument#*=}"
;;
--kver=*)
KERNEL_VERSION="${argument#*=}"
;;
--buildsystem)
IS_BUILDSYSTEM_BUILD=true
;;
--kernel_src_dir=*)
KERNEL_SRC_DIR="${argument#*=}"
;;
*)
log_error "'$argument' is not a valid argument"
print_help
exit $EINVAL
esac
done
if [ -z "$KERNEL_VERSION" ]; then
KERNEL_VERSION="$(uname -r)"
fi
if [ -z "$TARGET_SYSTEM_MAP_PATH" ]; then
log_error "no System.map file path provided"
exit $EINVAL
fi
OUTPUT_FILE=kernel_config.h
SYSTEM_MAP_DIRS=(${KERNEL_SRC_DIR} /lib/modules/${KERNEL_VERSION}/ /usr/lib/debug/boot/ /boot/)
ACRONIS_SYSTEM_MAPS_DIR=/usr/lib/Acronis/SnapAPIFiles/SystemMaps/
SYSTEM_MAP_MINSIZE=1000
function find_system_map()
{
local dir=$1
log_info "Seek System.map in '${dir}'"
if [ -e $dir/System.map-${KERNEL_VERSION} ] ;then
log_info "Found System.map-${KERNEL_VERSION} in '${dir}'"
SYSTEM_MAP_FILE_TMP=$dir/System.map-${KERNEL_VERSION}
elif [ -e $dir/System.map ] ;then
log_info "Found System.map in '${dir}'"
SYSTEM_MAP_FILE_TMP=$dir/System.map
fi
if [ ! -z ${SYSTEM_MAP_FILE_TMP} ]; then
size=$(stat -c%s "${SYSTEM_MAP_FILE_TMP}")
if (( $size > ${SYSTEM_MAP_MINSIZE} )); then
SYSTEM_MAP_FILE=${SYSTEM_MAP_FILE_TMP}
fi
fi
}
function get_acronis_system_map
{
boot_cfg_md5=( $(md5sum /boot/config-${KERNEL_VERSION}) )
if [ -e ${ACRONIS_SYSTEM_MAPS_DIR}/System.map-${KERNEL_VERSION}-$boot_cfg_md5 ]; then
SYSTEM_MAP_FILE=${ACRONIS_SYSTEM_MAPS_DIR}/System.map-${KERNEL_VERSION}-$boot_cfg_md5
fi
}
function generate_acronis_system_map
{
if [ "$KERNEL_VERSION" != "$(uname -r)" ]; then
log_error "SnapAPI System.map can be only generated for running kernel"
if [ "$IS_BUILDSYSTEM_BUILD" == false ]; then
exit $EINVAL
fi
fi
cat /proc/kallsyms | grep -e ' A \| B \| C \| D \| R \| T \| V \| W \| a ' > \
"$TARGET_SYSTEM_MAP_PATH"
}
for i in "${SYSTEM_MAP_DIRS[@]}"; do
find_system_map $i
if [ ! -z ${SYSTEM_MAP_FILE} ]; then
break
fi
done
if [ -z ${SYSTEM_MAP_FILE} ]; then
get_acronis_system_map
fi
if [ ! -z "${SYSTEM_MAP_FILE}" ]; then
cp "${SYSTEM_MAP_FILE}" "${TARGET_SYSTEM_MAP_PATH}"
else
log_info "System.map file not found, generating it from /proc/kallsyms"
generate_acronis_system_map
fi
rm -f ${OUTPUT_FILE}
log_info "Generate \"${OUTPUT_FILE}\" for kernel \"${KERNEL_VERSION}\" and system map \"${SYSTEM_MAP_FILE}\"."
echo "#ifndef SNAPAPI_KERNEL_CONFIG" >> "${OUTPUT_FILE}"
echo "#define SNAPAPI_KERNEL_CONFIG" >> "${OUTPUT_FILE}"
if [ $IS_BUILDSYSTEM_BUILD == false ] || [ -n "$SYSTEM_MAP_FILE" ]; then
echo "#define SNAPAPI_SYSTEM_MAP \"${TARGET_SYSTEM_MAP_PATH}\"" >> "${OUTPUT_FILE}"
SYMBOLS="printk blk_mq_submit_bio _printk"
for SYMBOL_NAME in ${SYMBOLS}
do
SYMBOL_ADDR=$(grep " ${SYMBOL_NAME}$" "${TARGET_SYSTEM_MAP_PATH}" | awk '{print $1}')
if [ -z "${SYMBOL_ADDR}" ]
then
log_warning "Function \"${SYMBOL_NAME}\" not found"
else
MACRO_NAME="$(echo ${SYMBOL_NAME} | awk '{print toupper($0)}')_ADDR"
echo "#define ${MACRO_NAME} 0x${SYMBOL_ADDR}" >> "${OUTPUT_FILE}"
log_info "Address of the function \"${SYMBOL_NAME}\" was defined"
fi
done
fi
# the end of the config file
echo "#endif" >> "${OUTPUT_FILE}"