util/chromeos: Update extract_blobs script

- Handle older CrOS firmware which lacks a COREBOOT FMAP region
- Add support for all blobs used in CrOS firmware 2013 to current
- Put extracted blobs in their own directory

Change-Id: Idaa39eca3be68a9327cead9b21c35a6c7a3a8166
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59266
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

1 files changed, 100 insertions, 24 deletions

diff --git a/util/chromeos/extract_blobs.sh b/util/chromeos/extract_blobs.sh
index 39f2a3b4e9..74b52205ea 100755
--- a/util/chromeos/extract_blobs.sh
+++ b/util/chromeos/extract_blobs.sh
@@ -2,40 +2,116 @@
 #
 # SPDX-License-Identifier: GPL-2.0-only
 
-set -x
+if [ ! -f "$1" ]; then
+	echo "Error: You must provide a valid filename"
+	exit 1
+fi
 
 IMAGE=$1
+# create new dir '$IMAGE-blobs' (less file extension)
+DIR=$(basename $IMAGE)
+DIR="${DIR%.*}-blobs"
+mkdir -p $DIR
 
-if [ ! -r "$IMAGE" ]; then
-  echo "Can't find image $IMAGE."
-  exit 1
+if [ -f ./cbfstool ]; then
+	CBFSTOOL="./cbfstool"
+else
+	CBFSTOOL=$(command -v cbfstool)
+fi
+if [[ "$CBFSTOOL" = "" ]]; then
+	echo "Error: cbfstool must be in your path or exist locally"
+	exit 1
 fi
 
-CBFSTOOL=$(which cbfstool)
-if [ $? != 0 ]; then
-  echo "Can't find cbfstool."
-  exit 1
+if [ -f ./ifdtool ]; then
+	IFDTOOL="./ifdtool"
+else
+	IFDTOOL=$(which ifdtool)
+fi
+if [[ "$IFDTOOL" = "" ]]; then
+	echo "Error: ifdtool must be in your path or exist locally"
+	exit 1
 fi
 
-IFDTOOL=$(which ifdtool)
-if [ $? != 0 ]; then
-  echo "Can't find ifdtool."
-  exit 1
+# ensure valid coreboot image / get list of main COREBOOT CBFS contents
+REGION=""
+if ! $CBFSTOOL $IMAGE print >$DIR/cbfs.txt 2>/dev/null; then
+	# try using BOOT_STUB region
+	if ! $CBFSTOOL $IMAGE print -r BOOT_STUB >$DIR/cbfs.txt; then
+		echo "Error reading CBFS: $IMAGE is not a valid coreboot image"
+		exit 1
+	else
+		REGION="-r BOOT_STUB"
+	fi
 fi
 
-$CBFSTOOL $IMAGE print
+echo ""
+echo "Extracting blobs..."
+echo ""
 
-if [ $? -ne 0 ]; then
-  echo "Not a coreboot image: $IMAGE"
-  exit 1
+# extract flash regions
+if ! $IFDTOOL -x $IMAGE >/dev/null; then
+	echo "Error reading flash descriptor/extracting flash regions"
+	exit 1
 fi
+# rename to normal convention; drop unused regions
+mv flashregion_0_flashdescriptor.bin $DIR/flashdescriptor.bin
+[ -f flashregion_2_intel_me.bin ] && mv flashregion_2_intel_me.bin $DIR/me.bin
+rm flashregion_*.bin
 
-PCI=$($CBFSTOOL $IMAGE print|grep pci|cut -f1 -d\ )
-MRC=$($CBFSTOOL $IMAGE print|grep mrc.bin|cut -f1 -d\ )
+# extract microcode
+$CBFSTOOL $IMAGE extract $REGION -n cpu_microcode_blob.bin -f $DIR/cpu_microcode_blob.bin
 
-$CBFSTOOL $IMAGE extract -n $PCI -f $PCI
-$CBFSTOOL $IMAGE extract -n $MRC -f $MRC
-$IFDTOOL -x $IMAGE
-mv flashregion_0_flashdescriptor.bin flashdescriptor.bin
-mv flashregion_2_intel_me.bin me.bin
-rm flashregion_*.bin
+# extract VGA BIOS
+VGA=$(grep pci $DIR/cbfs.txt | cut -f1 -d\ )
+if [ "$VGA" != "" ]; then
+	$CBFSTOOL $IMAGE extract $REGION -n $VGA -f $DIR/vgabios.bin
+fi
+
+# extract MRC.bin
+MRC=$(grep mrc.bin $DIR/cbfs.txt | cut -f1 -d\ )
+if [ "$MRC" != "" ]; then
+	$CBFSTOOL $IMAGE extract $REGION -n "$MRC" -f "$DIR/$MRC"
+fi
+
+# extract refcode
+REF=$(grep refcode $DIR/cbfs.txt | cut -f1 -d\ )
+if [ "$REF" != "" ]; then
+	$CBFSTOOL $IMAGE extract $REGION -n fallback/refcode -f "$DIR/refcode.elf" -m x86
+fi
+
+# extract FSP blobs
+for FSP in $(grep fsp $DIR/cbfs.txt | cut -f1 -d\ ); do
+	$CBFSTOOL $IMAGE extract $REGION -n $FSP -f $DIR/$FSP
+done
+
+# extract audio blobs
+for AUD in $(grep -e "-2ch-" -e "-4ch-" $DIR/cbfs.txt | cut -f1 -d\ ); do
+	$CBFSTOOL $IMAGE extract $REGION -n $AUD -f $DIR/$AUD
+done
+
+# extract VBTs
+for VBT in $(grep vbt $DIR/cbfs.txt | cut -f1 -d\ ); do
+	$CBFSTOOL $IMAGE extract $REGION -n $VBT -f $DIR/$VBT
+done
+
+# extract IFWI
+IFWI=$(cbfstool $IMAGE layout -w | grep IFWI)
+if [ "$IFWI" != "" ]; then
+	$CBFSTOOL $IMAGE read -r IFWI -f $DIR/ifwi.bin
+fi
+
+# generate hashes
+(
+	cd $DIR
+	: >hashes.txt
+	for FILE in $(ls *.{bin,elf} 2>/dev/null); do
+		sha256sum $FILE >>hashes.txt
+	done
+)
+
+# a little housekeeping
+rm $DIR/cbfs.txt
+
+echo ""
+echo "All done"