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define Build/cros-gpt
cp $@ $@.tmp 2>/dev/null || true
ptgen -o $@.tmp -g \
-T cros_kernel -N kernel -p $(CONFIG_TARGET_KERNEL_PARTSIZE)m \
-N rootfs -p $(CONFIG_TARGET_ROOTFS_PARTSIZE)m
cat $@.tmp >> $@
rm $@.tmp
endef
define Build/append-kernel-part
dd if=$(IMAGE_KERNEL) bs=$(CONFIG_TARGET_KERNEL_PARTSIZE)M conv=sync >> $@
endef
# NB: Chrome OS bootloaders replace the '%U' in command lines with the UUID of
# the kernel partition it chooses to boot from. This gives a flexible way to
# consistently build and sign kernels that always use the subsequent
# (PARTNROFF=1) partition as their rootfs.
define Build/cros-vboot
$(STAGING_DIR_HOST)/bin/cros-vbutil \
-k $@ -c "root=PARTUUID=%U/PARTNROFF=1" -o $@.new
@mv $@.new $@
endef
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