On Sat, Sep 2, 2017 at 8:16 AM, Russell King - ARM Linux
[off-list ref] wrote:

On Thu, Aug 31, 2017 at 10:43:19AM -0700, Tony Lindgren wrote:

quoted

* Russell King - ARM Linux [off-list ref] [170831 09:21]:

quoted

On Fri, Sep 01, 2017 at 01:05:16AM +0900, Roger Shimizu wrote:

quoted

On Fri, Sep 1, 2017 at 12:49 AM, Russell King - ARM Linux
[off-list ref] wrote:

quoted

What's the use case - what are you using the output of this script with?

I already provided a use case, to trace a Debian kernel issue caused
by kernel size.
- https://bugs.debian.org/870185#50

Sorry, I haven't time to look - it needs me to use firefox on a
different machine.  Maybe you could help by providing some details
by email, otherwise I've got extra work to do at some point in the
future (probably days away) if I remember (your mail will get buried).
Much of my time is in front of a _textual_ _only_ interface, and elinks
does not work with several modern SSL-only sites.

quoted

I also see other people complaining this issue:
 - https://bugs.launchpad.net/linaro-ubuntu/+bug/1050453
 - https://bugs.linaro.org/show_bug.cgi?id=461

By a random web search, I find another blog post on how to dissamble the kernel.
 - https://blog.packagecloud.io/eng/2016/03/08/how-to-extract-and-disassmble-a-linux-kernel-image-vmlinuz/

Yea, all SSL sites, I'm not going to try elinks with them, I don't
have the time to mess around.

I think the use case is to get the booted kernel size from zImage
to avoid overwriting dts or initramfs. Don't we already have that
at the end of zImage somewhere for kexec?

We do, but finding where that is is difficult if a DTB has been appended
as it's right at the end of the compressed data.  kexec doesn't use it,
it just assumes there's a 5x expansion of the kernel compressed image.

My patch already take the appended DTB blob part into consideration.
It uses "unxz --single-stream" instead of "unxz" to extract, so unxz
just ignore the DTB.

I confirmed it works well on my armel box, which need to append a
device specific DTB.

For the use case, I already provided several bug reports and blog posts.
I think current script is broken for armel/armhf, which can be fixed
by my patch.
So please kindly consider this patch. Thank you!

Cheers,
-- 
Roger Shimizu, GMT +9 Tokyo
PGP/GPG: 4096R/6C6ACD6417B3ACB1