1#! /bin/bash
2# SPDX-License-Identifier: GPL-2.0+
3#
4# Copyright (C) 2016, Lukasz Majewski <l.majewski@majess.pl>
5#
6
7# This file extracts default envs from built u-boot
8# usage: get_default_envs.sh [build dir] > u-boot-env-default.txt
9set -ue
10
11: "${OBJCOPY:=${CROSS_COMPILE:-}objcopy}"
12
13ENV_OBJ_FILE="built-in.o"
14ENV_OBJ_FILE_COPY="copy_${ENV_OBJ_FILE}"
15
16echoerr() { echo "$@" 1>&2; }
17
18if [ "$#" -eq 1 ]; then
19    path=${1}
20else
21    path=$(readlink -f $0)
22    path=${path%/scripts*}
23fi
24
25env_obj_file_path=$(find ${path} -path "*/env/*" -not -path "*/spl/*" \
26			 -name "${ENV_OBJ_FILE}")
27[ -z "${env_obj_file_path}" ] && \
28    { echoerr "File '${ENV_OBJ_FILE}' not found!"; exit 1; }
29
30cp ${env_obj_file_path} ${ENV_OBJ_FILE_COPY}
31
32# NOTE: objcopy saves its output to file passed in
33# (copy_${ENV_OBJ_FILE} in this case)
34
35${OBJCOPY} -O binary -j ".rodata.default_environment" ${ENV_OBJ_FILE_COPY}
36
37# Replace default '\0' with '\n' and sort entries
38tr '\0' '\n' < ${ENV_OBJ_FILE_COPY} | sort -u
39
40rm ${ENV_OBJ_FILE_COPY}
41
42exit 0
43