[Q] Unpacking CM boot image

Bytecode · Jul 9, 2013

Hello guys, I've been struggling since two and a half hours now to unpack boot.img taken from cm10.1 zip (get.cm). I have an error about the magic header, here it is.

Code:

Android Magic not found in boot.img. Giving up.

Fyi, I need to unpack/repack the boot image to change the bootlogo and kernel.
I've tried with any tool available (dsixda kitchen, championswimmer kernel kitchen, simple mkbootimg or unmkbootimg, xperia boot tools and more), no results. Anyone please?

gregbradley · Jul 9, 2013

Try asking in the question and answer section, that may help

Sent from the luxury of my tent

NuriJ · Jul 9, 2013

That's actually a kernel.elf, not boot.img

Rename it to kernel.elf, and use the kernel kitchen to extract it's contents.

..

Bytecode · Jul 10, 2013

NuriJ said:
That's actually a kernel.elf, not boot.img Rename it to kernel.elf, and use the kernel kitchen to extract it's contents.

..

Thank you man, you're a lifesaver. It works.

tOrNadO™ · Feb 13, 2014

NuriJ said:
That's actually a kernel.elf, not boot.img Rename it to kernel.elf, and use the kernel kitchen to extract it's contents.

..

Hi.. I found this dead thread when i googled for the same thing that OP also had,, I managed to unpack the kernel's boot.img by renaming it to kernel.elf.. I have to edit init,rc file in order to get bootclasspath lines from a cm10 fxp kernel and put it in my port ROM's init.rc and replace the bootclasspath.. But i never found init.rc file anywhere, there is an init file which doesn't have a bootclasspath but only PATH.. Can u help me with this?

NuriJ · Feb 18, 2014

tOrNadO_007™ said:
Hi.. I found this dead thread when i googled for the same thing that OP also had,, I managed to unpack the kernel's boot.img by renaming it to kernel.elf.. I have to edit init,rc file in order to get bootclasspath lines from a cm10 fxp kernel and put it in my port ROM's init.rc and replace the bootclasspath.. But i never found init.rc file anywhere, there is an init file which doesn't have a bootclasspath but only PATH.. Can u help me with this?

Are you looking in ramdisk?

tOrNadO™ · Feb 19, 2014

NuriJ said:
Are you looking in ramdisk?

Yes.. I did that too.. Unfortunately all the methods didn't work.. One simple method worked though.. Change the permissions of all the unpacked files and mount the ramdisk.img and then extract it and change contents of any file of your choice and then repack it.. It works like a charm..

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[Q] Unpacking CM boot image

Bytecode

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gregbradley

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NuriJ

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Bytecode

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tOrNadO™

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NuriJ

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tOrNadO™

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