[OpenWrt-Devel] [PATCH] ramips: build factory images for Netgear EX2700

[John Crispin]

Hi,

we do something very similar on some lantiq boards.

On 16/02/2016 21:25, Joseph C. Lehner wrote:
> This patch adds support for building factory and sysupgrade images
> for the Netgear EX2700 that don't require modification of u-boot
> environment variables.
>

could you please briefly describe what,why,how you are doing and ...

> Signed-off-by: Joseph C. Lehner <joseph.c.lehner at gmail.com>
>
> ---
>
> diff --git a/target/linux/ramips/image/Makefile
b/target/linux/ramips/image/Makefile
> index 8bdd76a..68580ad 100644
> --- a/target/linux/ramips/image/Makefile
> +++ b/target/linux/ramips/image/Makefile
> @@ -912,8 +912,65 @@ endif
>  # MT7620A Profiles
>  #

[...]

> +	# Manually create the header of a 0 byte uImage. We can't use
> +	# mkimage because it wont let us use an empty source file.
> +	$(eval fakeroot=$(KDIR)/fakeroot-$(2).uImage)
> +
> +	# ih_magic:
> +	echo -ne '\x27\x05\x19\x56' > $(fakeroot)
> +	# ih_hcrc:
> +	echo -ne '\x22\x6e\x07\xc1' >> $(fakeroot)
> +	# ih_time:
> +	echo -ne '\x00\x00\x00\x00' >> $(fakeroot)
> +	# ih_size:
> +	echo -ne '\x00\x00\x00\x00' >> $(fakeroot)
> +	# ih_load:
> +	echo -ne '\x00\x00\x00\x00' >> $(fakeroot)
> +	# ih_ep:
> +	echo -ne '\x00\x00\x00\x00' >> $(fakeroot)
> +	# ih_dcrc:
> +	echo -ne '\x00\x00\x00\x00' >> $(fakeroot)
> +	# ih_os, ih_arch, ih_type, ih_comp:
> +	echo -ne '\x05\x05\x07\x00' >> $(fakeroot)
> +	# ih_name:
> +	echo -n 'OpenWrt fakeroot' >> $(fakeroot)
> +	# padding:
> +	echo -ne '\x00\x00\x00\x00' >> $(fakeroot)
> +	echo -ne '\x00\x00\x00\x00' >> $(fakeroot)
> +	echo -ne '\x00\x00\x00\x00' >> $(fakeroot)
> +	echo -ne '\x00\x00\x00\x00' >> $(fakeroot)
> +

this is all static data. simply throw a file with the content into
target/linux/ramips/image/ex2700-fake-uImage instead of creating the
file everytime.

John
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