1 files changed, 96 insertions, 0 deletions
diff --git a/resources/libreboot/install/depthcharge/chromebook-flash-replace b/resources/libreboot/install/depthcharge/chromebook-flash-replace
new file mode 100755
index 0000000..4ad3fab
--- /dev/null
+++ b/resources/libreboot/install/depthcharge/chromebook-flash-replace
@@ -0,0 +1,96 @@
+#!/bin/bash
+
+#  replace the requested parts in the flash image with separate parts images
+#
+#	Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+[ "x${DEBUG+set}" = 'xset' ] && set -v
+
+regex="\([0-9a-fA-F]*\):\([0-9a-fA-F]*\)[[:space:]]*\(.*\)"
+block=256
+layout="layout.txt"
+flash=$1
+
+shift 1
+
+if [ ! -f "$flash" ]
+then
+	echo "Usage: $0 [flash image] [image] ..."
+	exit 1
+fi
+
+if [ ! -f "$layout" ]
+then
+	echo "Missing layout file: $layout"
+	exit 1
+fi
+
+flashsize=$( stat $flash -c "%s" )
+
+for image in $@; do
+	range=$( grep "$image" "$layout" )
+	name=$( echo "$range" | sed "s/$regex/\3/g" )
+	file="$name.img"
+
+	if [ -z "$range" ] || [ ! -f "$file" ]
+	then
+		echo "Invalid image name: $name"
+		continue
+	fi
+
+	start=$( echo "$range" | sed "s/$regex/\1/g" )
+	start=$( printf "%d\n" "0x$start" )
+	stop=$( echo "$range" | sed "s/$regex/\2/g" )
+	stop=$( printf "%d\n" "0x$stop" )
+
+	size=$(( $stop - $start + 1 ))
+	filesize=$( stat $file -c "%s" )
+
+	if [ $size -ne $filesize ]
+	then
+		echo "Invalid file size: expected $size, read $filesize"
+		continue
+	fi
+
+	if [ $size -gt $flashsize ]
+	then
+		echo "Image size too big for flash"
+		continue
+	fi
+
+	printf "Replacing $image in $flash\n\n"
+
+	if [ $start -gt 0 ]
+	then
+		dd if=$flash of=before.img bs=$block count=$(( $start / $block ))
+	else
+		touch before.img
+	fi
+
+	if [ $(( $stop + 1 )) -lt $flashsize ]
+	then
+		dd if=$flash of=after.img skip=$(( ($stop + 1) / $block )) bs=$block count=$(( ($flashsize - $stop - 1) / $block ))
+	else
+		touch after.img
+	fi
+
+	cat before.img $file after.img > $flash
+
+	rm before.img after.img
+
+	printf "\n"
+done