1#! /bin/bash
2#
3# Copyright (C) 2016, Lukasz Majewski <l.majewski@majess.pl>
4#
5# SPDX-License-Identifier:      GPL-2.0+
6#
7
8# This file extracts default envs from built u-boot
9# usage: get_default_envs.sh [build dir] > u-boot-env-default.txt
10set -ue
11
12: "${OBJCOPY:=${CROSS_COMPILE:-}objcopy}"
13
14ENV_OBJ_FILE="built-in.o"
15ENV_OBJ_FILE_COPY="copy_${ENV_OBJ_FILE}"
16
17echoerr() { echo "$@" 1>&2; }
18
19if [ "$#" -eq 1 ]; then
20    path=${1}
21else
22    path=$(readlink -f $0)
23    path=${path%/scripts*}
24fi
25
26env_obj_file_path=$(find ${path} -path "*/env/*" -not -path "*/spl/*" \
27			 -name "${ENV_OBJ_FILE}")
28[ -z "${env_obj_file_path}" ] && \
29    { echoerr "File '${ENV_OBJ_FILE}' not found!"; exit 1; }
30
31cp ${env_obj_file_path} ${ENV_OBJ_FILE_COPY}
32
33# NOTE: objcopy saves its output to file passed in
34# (copy_${ENV_OBJ_FILE} in this case)
35
36${OBJCOPY} -O binary -j ".rodata.default_environment" ${ENV_OBJ_FILE_COPY}
37
38# Replace default '\0' with '\n' and sort entries
39tr '\0' '\n' < ${ENV_OBJ_FILE_COPY} | sort -u
40
41rm ${ENV_OBJ_FILE_COPY}
42
43exit 0
44