Pack ramdisk into zImage without using kernel build system

[petter]

Hi, I wanna pack android's ramdisk into zImage without using kernel's build system. I know that in kernel sources /sripts/gen_initramfs_list.sh will generate list of files for initramfs and /usr/gen_init_cpio will create cpio archive (packed initramfs files, i think that it is same like cpio binary in android_platform/system/core/cpio) and somehow this cpio is merged with kernel binary by kernel's build system. Could somebody guide me how to merge ramdisk image with zImage manually (by manually I mean that I will write C utility for doing this process)

[petter]

Hi, thanks for reply, but I need to create my own mkbootimg binary, because my bootloader doesn't support android's boot.img layout. My bootloader supports standart linux zImage with initramfs, so I need to write mkbootimg binary, which will merge zImage with android's ramdisk(initramfs) in kernel style, so I need to understand how kernel's build system do this merge.

Dne pondělí, 18. června 2012 17:33:29 UTC+2 Filip Zalewski napsal(a):

If you have a boot.img from an existing device, you can use the following process to extract the ramdisk, supply your own zImage, and repack back into a bootable image. 

http://android-dls.com/wiki/index.php?title=HOWTO:_Unpack%2C_Edit%2C_and_Re-Pack_Boot_Images