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authorLukasz Majewski <l.majewski@majess.pl>2016-09-17 06:57:39 +0200
committerTom Rini <trini@konsulko.com>2016-10-06 21:00:53 -0400
commit27229b2a4caf60ef685f8b9d1a3f6304487b18c7 (patch)
treea80641556dc7d2558b2864cc641908959540888b
parentf61c9bcdfd3d1bb4ab6680d567081b0f6cbf908b (diff)
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scripts: Add script to extract default environment
This script looks for env_common.o object file and extracts from it default u-boot environment, which is afterwards printed on standard output. Usage example: get_default_envs.sh > u-boot-env-default.txt The generated text file can be used as input for mkenvimage. Signed-off-by: Lukasz Majewski <l.majewski@majess.pl> Reviewed-by: Simon Glass <sjg@chromium.org>
-rwxr-xr-xscripts/get_default_envs.sh34
1 files changed, 34 insertions, 0 deletions
diff --git a/scripts/get_default_envs.sh b/scripts/get_default_envs.sh
new file mode 100755
index 0000000..7955db6
--- /dev/null
+++ b/scripts/get_default_envs.sh
@@ -0,0 +1,34 @@
+#! /bin/bash
+#
+# Copyright (C) 2016, Lukasz Majewski <l.majewski@majess.pl>
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+# This file extracts default envs from built u-boot
+# usage: get_default_envs.sh > u-boot-env-default.txt
+set -ue
+
+ENV_OBJ_FILE="env_common.o"
+ENV_OBJ_FILE_COPY="copy_${ENV_OBJ_FILE}"
+
+echoerr() { echo "$@" 1>&2; }
+
+path=$(readlink -f $0)
+env_obj_file_path=$(find ${path%/scripts*} -not -path "*/spl/*" \
+ -name "${ENV_OBJ_FILE}")
+[ -z "${env_obj_file_path}" ] && \
+ { echoerr "File '${ENV_OBJ_FILE}' not found!"; exit 1; }
+
+cp ${env_obj_file_path} ${ENV_OBJ_FILE_COPY}
+
+# NOTE: objcopy saves its output to file passed in
+# (copy_env_common.o in this case)
+objcopy -O binary -j ".rodata.default_environment" ${ENV_OBJ_FILE_COPY}
+
+# Replace default '\0' with '\n' and sort entries
+tr '\0' '\n' < ${ENV_OBJ_FILE_COPY} | sort -u
+
+rm ${ENV_OBJ_FILE_COPY}
+
+exit 0