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[u-boot] / scripts / get_default_envs.sh
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
10 set -ue
11
12 : "${OBJCOPY:=${CROSS_COMPILE:-}objcopy}"
13
14 ENV_OBJ_FILE="built-in.o"
15 ENV_OBJ_FILE_COPY="copy_${ENV_OBJ_FILE}"
16
17 echoerr() { echo "$@" 1>&2; }
18
19 if [ "$#" -eq 1 ]; then
20     path=${1}
21 else
22     path=$(readlink -f $0)
23     path=${path%/scripts*}
24 fi
25
26 env_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
31 cp ${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
39 tr '\0' '\n' < ${ENV_OBJ_FILE_COPY} | sort -u
40
41 rm ${ENV_OBJ_FILE_COPY}
42
43 exit 0