galaxys2_kernel_repack: A C repository from loc1129

= Galaxy S2 Kernel Packing/Repacking Tools =

Use cygwin you must install lzop and OpenSSL binary.

arm-linux-androideabi-4.4.3-windows.tar.gz compiler: http://d-h.st/Tqj


To unpack:
        $ ./unpack.sh [original_zImage] [unpack_output_dir]

Modify files in unpack output dir as necessary.

To repack:

   a) Generate ramfs output.cpio from unpack output dir:
        $ ./gen_initramfs.sh -o [output.cpio] -u 0 -g 0 [unpack_output_dir]

   b) Ensure your toolchain binaries are on your path

   c) Set COMPILER_LIB environment variable to your toolchain gcc lib directory

   d) Repack ramfs output.cpio and kernel from original zImage to new zImage
        $ ./repack.sh [original_zImage] [output.cpio] [new_zImage]

   e) Resize new zImage to size of original zImage
        $ dd if=[new_zImage] of=[new_zImage_resized] bs=[original_zImage_size] conv=sync

= Original Documentation =

Please edit repack.sh:
	# you should point where your cross-compiler is         
	COMPILER=/home/xiaolu/bin/android-toolchain-eabi/bin/arm-eabi-
	COMPILER_LIB=/home/xiaolu/bin/android-toolchain-eabi/lib/gcc/arm-eabi/4.5.4

Unpack zImage,Usage:
	./unpack.sh zImagesy267 sy267

Repack zImage,Usage:
	./repack.sh zImagesy267 initramfs.cpio new_zImage
	or
	./repack.sh zImagesy267 sy267 new_zImage

Padding sufile to new_zImage offset=7000000,Example:
	./repack.sh zImagesm189 sm189.cpio new_zImage su

	post-int.sh(init.rc services):
	dd if=/dev/block/mmcblk0p5 of=/system/bin/su skip=7000000 seek=0 bs=1 count=26336
	dd if=/dev/block/mmcblk0p5 of=/system/app/Superuser.apk skip=7026336 seek=0 bs=1 count=196640


Use tar.xz In the end of the new_zImage:
	./repack.sh zImagesy262 initramfs.cpio new_zImage payload

	how to use,pls read initramfs-sample/sbin/script/post-init.sh & recovery.sh
	recovery.tar.xz and boot.tar.xz in resources directory，you can customize.
	In recovery.sh:
	cd /
	eval $(read_boot_headers /dev/block/mmcblk0p5)
	load_offset=$recovery_offset
	load_len=$recovery_len
	dd bs=512 if=/dev/block/mmcblk0p5 skip=$load_offset count=$load_len | xzcat | tar x


Custom zImage compression type:
	./repack.sh zImagesy267 initramfs.cpio new_zImage gzip
	or
	./repack.sh zImagesy267 initramfs.cpio new_zImage payload gzip

中文版：
修改repack.sh开头的编译器路径和库文件路径，改为你自己的：
	COMPILER=/home/xiaolu/bin/android-toolchain-eabi/bin/arm-eabi-
	COMPILER_LIB=/home/xiaolu/bin/android-toolchain-eabi/lib/gcc/arm-eabi/4.5.4
	
解包zImage，例如：
	./unpack.sh zImagesy267 sy267
	
重新打包编译zImage：
	格式：
	./repack.sh 原始zImage initramfs(目录或者cpio文件) 新zImage名
	例如：
	./repack.sh zImagesy267 initramfs.cpio new_zImage
	or
	./repack.sh zImagesy267 sy267 new_zImage
	
	对于超出大小的initramfs，可以使用下边两种办法来打包：
	1.把2进制的su文件和Superuser.apk文件放在新zImage的7000000字节偏移处，命令：
	./repack.sh zImagesm189 sm189.cpio new_zImage su
	如何在启动的时候调用su和Superuser.apk，请在root脚本里添加如下:
	dd if=/dev/block/mmcblk0p5 of=/system/bin/su skip=7000000 seek=0 bs=1 count=26336
	dd if=/dev/block/mmcblk0p5 of=/system/app/Superuser.apk skip=7026336 seek=0 bs=1 count=196640
	
	2.使用把一些大文件打包成tar.xz放在zImage末尾，启动需要用到的时候读取压缩包偏移量，用DD复制出来解压到rootfs相应位置。
	./repack.sh zImagesy262 initramfs.cpio new_zImage payload
	上边的命令是打包的同时把recovery.tar.xz和boot.tar.xz放在zImage末尾，下边说一下如何使用，以启动recovery(recovery.sh)为例子：
	cd /
	eval $(read_boot_headers /dev/block/mmcblk0p5)
	load_offset=$recovery_offset
	load_len=$recovery_len
	dd bs=512 if=/dev/block/mmcblk0p5 skip=$load_offset count=$load_len | xzcat | tar x
	
	自定义zImage压缩类型：
	./repack.sh zImagesy267 initramfs.cpio new_zImage gzip
	或者
	./repack.sh zImagesy267 initramfs.cpio new_zImage payload gzip
loc1129/galaxys2_kernel_repack
