generate-squashfs: Handle a signed VERSION partition
If VERSION is signed it will be 8K instead of 4K to accomodate the
header. Skip past the header so the version name can still be parsed.
Change-Id: I07f0bd136a42e94e5b4e59eaa0eb59c1aacf2e87
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
diff --git a/generate-squashfs b/generate-squashfs
index 3e74e9b..71f4e5e 100755
--- a/generate-squashfs
+++ b/generate-squashfs
@@ -120,6 +120,16 @@
pflash --partition=part --read=${scratch_dir}/part -F ${pnorfile}
pflash --partition=VERSION --read=${scratch_dir}/VERSION -F ${pnorfile}
+version_size=$(du -k ${scratch_dir}/VERSION | head -1 | cut -f 1)
+magic_number=$(xxd -p -l 4 ${scratch_dir}/VERSION)
+# Check if VERSION is signed. A signed version partition will have an extra
+# 4K header starting with the magic number 0x17082011, see:
+# https://github.com/open-power/skiboot/blob/master/libstb/container.h#L47
+if [ "$version_size" == "8" -a "$magic_number" == "17082011" ]; then
+ # Advance past the STB header (4K, indexed from 1)
+ cp ${scratch_dir}/VERSION ${scratch_dir}/VERSION_FULL
+ tail --bytes=+4097 ${scratch_dir}/VERSION_FULL > ${scratch_dir}/VERSION
+fi
{
version=$(head -n 1 ${scratch_dir}/VERSION)
echo "version=$version"