[TOOL] Boot.img tools [unpack, repack, ramdisk]

mantalamo · Jan 23, 2014

Beginner me

are these tools would be enough to edit/modify something in the boot.img? This will be my first attempt. My purpose is to change the boot splash image of a Kernel. With my intent to use this tool, would these suffice my needs? Thanks

CNexus · Jan 29, 2014

johnwilliam_a_k_a_trash said:
are these tools would be enough to edit/modify something in the boot.img? This will be my first attempt. My purpose is to change the boot splash image of a Kernel. With my intent to use this tool, would these suffice my needs? Thanks

Yes

oldsoldier2003 · Feb 28, 2014

CNexus said:
Note: These tools were made for Linux. They may also work on Cygwin, but I have not personally tested them.

I suspect they were compiled on Ubuntu since Debian stable (wheezy as of this writing) uses an older version of glibc which causes mkbootimg to choke. Debian users will need to upgrade to testing/Jessie (swapping libc is not advisable, it is just better to go with Jessie)

oldsoldier2003 · Mar 15, 2014

oldsoldier2003 said:
I suspect they were compiled on Ubuntu since Debian stable (wheezy as of this writing) uses an older version of glibc which causes mkbootimg to choke. Debian users will need to upgrade to testing/Jessie (swapping libc is not advisable, it is just better to go with Jessie)

Update:
These tools work great on Debian Jessie/SID

I forgot to mention this for folks that are Debian users. Thanks for making these tools accessible to the masses

Slimegod · Mar 22, 2014

How do I use this with Ubuntu?

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oldsoldier2003 · Mar 23, 2014

These tools are command line tools you run them from a terminal. See the first part for usage

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Slimegod · Apr 10, 2014

oldsoldier2003 said:
These tools are command line tools you run them from a terminal. See the first part for usage

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Do I have to rename the file after it's extracted to run it in Ubuntu?

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Mr_Ada · Apr 30, 2014

Works with Cygwin

I was able to use scripts with cygwin.

Very cool.

ShinySide · May 4, 2014

oldsoldier2003 said:
I suspect they were compiled on Ubuntu since Debian stable (wheezy as of this writing) uses an older version of glibc which causes mkbootimg to choke. Debian users will need to upgrade to testing/Jessie (swapping libc is not advisable, it is just better to go with Jessie)

God I need to start reading posts more often.... Thanks for the tip....

nasr18 · May 18, 2014

CNexus said:
I have not seen this posted anywhere, so I thought I would post it here. This is NOT purely my work, and I do not take credit for it as such.

Included in the attached ZIP are the following files:

boot_info - prints information about the boot.img passed to it, including the base address and ramdisk address. This tool prints out everything needed to repack the boot.img correctly.

split_boot - More commonly known as split_bootimg.pl, this rips apart the boot.img to extract the ramdisk and zImage. It has been modified by me to split the boot.img into a separate folder (specified by the file name of the boot.img passed to it) and to extract the ramdisk into a sub-folder as well (extracts the cpio from the gz and then extracts the actual files from the cpio archive)

unpack_ramdisk - unpacks the given ramdisk file.

Code:

Usage: unpack_ramdisk <ramdiskFile>

repack_ramdisk - repacks the ramdisk from the given directory (found online and modified slightly to take a directory)

Code:

Usage: repack_ramdisk <ramdiskDirectory> [outputFile]

mkbootimg - mkbootimg binary that creates a boot.img file from the given ramdisk and zImage. Updated to a version compiled by me to support the --ramdiskaddr option (ramdisk address) so that even nonstandard boot.img's can be repacked correctly (Use with boot_info for best results).

umkbootimg - included for convenience. Not made by me. Original thread here.

unpack - wrapper script made by me for the umkbootimg binary^ to unpack the boot.img into a separate directory and then unpack the ramdisk into a sub-directory.

Note: These tools were made for Linux. They may also work on Cygwin, but I have not personally tested them.

ANYONE is free to use / modify / kang these files as they see fit. No need to ever ask or do anything more than download.

Enjoy.

bro I'm having ur file, but don't know how to run. please say it elaborately for me.

hope you will reply.

kwisatz79 · Jul 8, 2014

Mr_Ada said:
I was able to use scripts with cygwin.

Very cool.

How did u managed it? I allways get errors that he does not find all the commands.

Thx in advance.

Mr_Ada · Jul 8, 2014

kwisatz79 said:
How did u managed it? I allways get errors that he does not find all the commands.

Thx in advance.

if you can post those errors, maybe we can determine the cause of the error.

chris

CNexus · Jul 8, 2014

kwisatz79 said:
How did u managed it? I allways get errors that he does not find all the commands.

Thx in advance.

The scripts make use of gzip, gunzip, cpio, and others so make sure you download those when you go through the cygwin installer

vlackhonor · Aug 1, 2014

Some devices boot.img (G730-U00 boot.img) is can't unpack repack
how to ??

spanish33 · Aug 14, 2014

@CNexus thank you, this tool helped me edit my ramdisk .

m9j_cfALt · Aug 21, 2014

better tool than urs..
no need of cygwin.. perl interpreter
with GUI.. for windows.. tiny and fast..

xdaforums.com/general/general/tool-abime-android-boot-image-editor-t2847426

ShinySide · Aug 21, 2014

m9j_cfALt said:
better tool than urs..
no need of cygwin.. perl interpreter
with GUI.. for windows.. tiny and fast..

xdaforums.com/general/general/tool-abime-android-boot-image-editor-t2847426

That was just sad....

bigwillyg · Aug 21, 2014

ShinySide said:
That was just sad....

And shameful. And rude

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m9j_cfALt · Aug 22, 2014

bigwillyg said:
And shameful. And rude

Sent from my SPH-L710 using Tapatalk

i know i dont know how to write without being rude..
i just wrote the comment.. and thought over and over whole the night why did i wrote in such language..
im feeling guilty.. apologize..
btw.. ur tool is mother of mine.. and i learned lot from it..

honestly... Manoj Bhakar PCM(m9j_cfALt)

mikeymopar · Aug 25, 2014

a little stuck on mkbootimg

hi guys...i need a little help please.
unpack works perfectly and it displays (among other things):

Code:

*** WARNING ****
This image is built using NON-standard mkbootimg!
OFF_KERNEL_ADDR is 0xFE208100
OFF_RAMDISK_ADDR is 0x00200100
OFF_SECOND_ADDR is 0xFF100100
Please modify mkbootimg.c using the above values to build your image.

where do i enter those values. i'm guessing the mkbootimg command line but where and how is it worded.

repack_ramdisk works as advertised giving new-ramdisk.cpio.gz. but then using mkbootimg with what unpack displays as shown above (without trying to add the non-standard addr values yet just to see if it works)

Code:

To recompile this image, use:
  mkbootimg --kernel zImage --ramdisk initramfs.cpio.gz --base 0x1dfff00 --cmdline 'console=null androidboot.hardware=qcom user_debug=31 msm_rtb.filter=0x37 ehci-hcd.park=3' -o new_boot.img

i get this error all the time

Code:

mike@mike-VirtualBox:/usr/local/bin/kernels$ mkbootimg --kernel zImage --ramdisk initramfs.cpio.gz --base 0x1dfff00 --cmdline 'console=null androidboot.hardware=qcom user_debug=31 msm_rtb.filter=0x37 ehci-hcd.park=3' -o new_boot.img
bash: /usr/local/bin/kernels/mkbootimg: cannot execute binary file: Exec format error

before using mkbootimg do zImage and new-ramdisk.clio.gz need to be moved into a separate folder or renamed or...or.......

(i'm using lubuntu. all the first steps of this kernel tool work perfect. i couldn't get mkbootimg to work for the life of me over the last two nights)
THANKS for any help/suggestions!!!

[TOOL] Boot.img tools [unpack, repack, ramdisk]

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