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https://github.com/brain-hackers/u-boot-brain
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15c160301c
It's possible that the default_environment[] array contains multiple entries for the same variable, e.g. a setting from env_default.h based on some CONFIG_* variable, and another from CONFIG_EXTRA_ENV_SETTINGS. In such a case, the last setting takes effect. Hence, in order to be able to use the output from this script as an CONFIG_DEFAULT_ENV_FILE and get the same default environment as one currently has, we need to preserve the order. So only sort by the variable name, and disable the last-resort comparison. We could pipe the result through uniq to remove duplicate lines, but I think there's some value in seeing that certain variables are defined multiple times. Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk> Reviewed-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
43 lines
1.1 KiB
Bash
Executable File
43 lines
1.1 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0+
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#
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# Copyright (C) 2016, Lukasz Majewski <l.majewski@majess.pl>
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#
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# This file extracts default envs from built u-boot
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# usage: get_default_envs.sh [build dir] > u-boot-env-default.txt
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set -ue
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: "${OBJCOPY:=${CROSS_COMPILE:-}objcopy}"
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ENV_OBJ_FILE="built-in.o"
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ENV_OBJ_FILE_COPY="copy_${ENV_OBJ_FILE}"
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echoerr() { echo "$@" 1>&2; }
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if [ "$#" -eq 1 ]; then
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path=${1}
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else
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path=$(readlink -f $0)
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path=${path%/scripts*}
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fi
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env_obj_file_path=$(find ${path} -path "*/env/*" -not -path "*/spl/*" \
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-not -path "*/tools/*" -name "${ENV_OBJ_FILE}")
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[ -z "${env_obj_file_path}" ] && \
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{ echoerr "File '${ENV_OBJ_FILE}' not found!"; exit 1; }
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cp ${env_obj_file_path} ${ENV_OBJ_FILE_COPY}
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# NOTE: objcopy saves its output to file passed in
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# (copy_${ENV_OBJ_FILE} in this case)
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${OBJCOPY} -O binary -j ".rodata.default_environment" ${ENV_OBJ_FILE_COPY}
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# Replace default '\0' with '\n' and sort entries
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tr '\0' '\n' < ${ENV_OBJ_FILE_COPY} | sort --field-separator== -k1,1 --stable
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rm ${ENV_OBJ_FILE_COPY}
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exit 0
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