+define Build/elecom-product-header
+ $(eval product=$(word 1,$(1)))
+ $(eval fw=$(if $(word 2,$(1)),$(word 2,$(1)),$@))
+
+ ( \
+ echo -n -e "ELECOM\x00\x00$(product)" | dd bs=40 count=1 conv=sync; \
+ echo -n "0.00" | dd bs=16 count=1 conv=sync; \
+ dd if=$(fw); \
+ ) > $(fw).new
+ mv $(fw).new $(fw)
+endef
+
+define Build/elx-header
+ $(eval hw_id=$(word 1,$(1)))
+ $(eval xor_pattern=$(word 2,$(1)))
+ ( \
+ echo -ne "\x00\x00\x00\x00\x00\x00\x00\x03" | \
+ dd bs=42 count=1 conv=sync; \
+ hw_id="$(hw_id)"; \
+ echo -ne "\x$${hw_id:0:2}\x$${hw_id:2:2}\x$${hw_id:4:2}\x$${hw_id:6:2}" | \
+ dd bs=20 count=1 conv=sync; \
+ echo -ne "$$(printf '%08x' $$(stat -c%s $@) | fold -s2 | xargs -I {} echo \\x{} | tr -d '\n')" | \
+ dd bs=8 count=1 conv=sync; \
+ echo -ne "$$($(STAGING_DIR_HOST)/bin/mkhash md5 $@ | fold -s2 | xargs -I {} echo \\x{} | tr -d '\n')" | \
+ dd bs=58 count=1 conv=sync; \
+ ) > $(KDIR)/tmp/$(DEVICE_NAME).header
+ $(call Build/xor-image,-p $(xor_pattern) -x)
+ cat $(KDIR)/tmp/$(DEVICE_NAME).header $@ > $@.new
+ mv $@.new $@
+ rm -rf $(KDIR)/tmp/$(DEVICE_NAME).header
+endef
+