RK3188 - MINIX NEOX7mini - Unpack and repack boot.img

[tryin]

Hi all folks,
I have some question about the partition dumped from NEO X7mini.
Try to explain, I'm using rkflashtool.
This is the output of:

rkflashtool r 0 1 | head -n 11

-------------------------------------------------------------------------------------------------
CMDLINE:console=ttyFIQ0 androidboot.console=ttyFIQ0
init=/init initrd=0x62000000,0x00800000 mtdparts=rk29xxnand:
0x00002000@0x00002000(misc),
0x00008000@0x00004000(kernel),
0x00008000@0x00012000(boot),
0x00010000@0x00020000(recovery),
0x00020000@0x00030000(backup),
0x00040000@0x00050000(cache),
0x00800000@0x00090000(userdata),
0x00002000@0x00890000(kpanic),
0x00130000@0x00892000(system),
-@0x009c5000(user)
-------------------------------------------------------------------------------------------------

I guess the boot partition is something like:

+-------+ <--- 0x00019fe0
| boot |
+-------+ <----0x00012000

With the same tool I'm able to dump the entrie boot partition on my linux box, so:

rkflashtool r 0x12000 0x8000 > b00t.img

Now, I have find out that with rkunpack we can unpack this b00t.img. The output are two file:

b00t.img-raw
b00t.img-symbol

The first file is no more than a gzip compressed data file, I'm able to extract the data in a directory with this command:

gunzip < ../b00t.img-raw | sudo cpio -i --make-directories

Now in this dir I have all the files of the / partition. I can modify for example the /init.rc.
I want to repack the entrie b00t.img in order to flash it again on the device.
I've already tried to repack the modified directory in this two ways:

mkcramfs myboot myboot-temp.img # myboot is the dir in which I unpacked b00t.img-raw
kcrc myboot-temp.img customboot.img

or

find . ! -name "."| sort | cpio -oa -H newc | gzip -n > ../newboot.gz
kcrc newboot.gz customboot.img

None of these leads to obtain a file large enough to fit the boot partition on the deivice, that I want fill with:

rkflashtool w 0x12000 0x8000 < modifiedb00t.img

NB:
In this thread some guys talking about something similar to my problem:

http://www.freaktab.com/showthread.php?287-RockChip-ROM-Building-Tips-and-Tricks-by-Finless&p=4055&viewfull=1#post4055

But rkunpack of dumped boot.img return they only boot.img-raw.

Can someone help me?

Thanks in advance.

[taki]

I need to learn boot unpack repack

I used for boot unpack/repack RK3xxx_firmware_tools_4.1.22.00. tools. seem to be work. I am not expert or guru only beginer. I need to create for boot var and tmp folder in root folder. If you find truely method for unpack/repack. pls share us

[tryin]

Sure! Give me some time...
Have you already done something?

[tryin]

I need to create for boot var and tmp folder in root folder.

You could start by dumping your boot partition...