mirror of
https://github.com/xiaolu/mkbootimg_tools.git
synced 2026-02-13 13:39:30 +01:00
391 lines
13 KiB
Bash
Executable File
391 lines
13 KiB
Bash
Executable File
#!/system/xbin/bash
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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#boot.img tool
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#original author: xiaolu
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#heavily modified by: Modding.MyMind
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#set -x # for debugging
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trap "clean" 2 3 4
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workdir=$(pwd)
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toolpath=$(readlink -f $0)
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tooldir=$(dirname $toolpath)
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mkbootimg=$tooldir/mkbootimg
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mkbootfs=$tooldir/mkbootfs
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busybox=$(command -v busybox)
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od=$tooldir/od
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gzip=$tooldir/gzip
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lz4=$tooldir/lz4
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lzma=$tooldir/lzma
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xz=$tooldir/xz # Also used for lzma compression
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grep=$tooldir/grep
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cpio=$tooldir/cpio
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magic=$tooldir/magic
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file=$tooldir/file
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old_bootimg=true
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C_OUT="\033[0;1m"
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C_ERR="\033[31;1m"
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C_CLEAR="\033[0;0m"
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pout() {
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$busybox printf "${C_OUT}${*}${C_CLEAR}\n"
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}
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perr() {
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$busybox printf "${C_ERR}${*}${C_CLEAR}\n"
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}
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clean()
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{
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$busybox rm -rf /tmp/mkboot.*
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#pout "..."
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exit
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}
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# Check for busybox
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if [ -z $busybox ]; then
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clear; pout "Busybox is NOT installed!\nThis may cause issues with the script!\nUse at your own risk or install busybox!"; sleep 3
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fi
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usage()
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{
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pout "<Unpack and repack boot.img tool>"
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pout "----------------------------------------------------------------------"
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pout "Not enough parameters or parameter error!"
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pout "unpack boot.img & decompress ramdisk：\n $($busybox basename $0) [img] [output dir]"
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pout " $($busybox basename $0) boot.img boot20130905"
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pout "Use the unpacked directory repack boot.img(img_info)：\n $($busybox basename $0) [unpacked dir] [newbootfile]"
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pout " $($busybox basename $0) boot20130905 newboot.img"
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clean
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}
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print_info()
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{
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pout " kernel : $kernel"
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pout " ramdisk : $ramdisk"
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pout " page size : $page_size"
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pout " kernel size : $kernel_size"
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pout " ramdisk size : $ramdisk_size"
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[ ! -z $second_size ] && [ $second_size -gt 0 ] && \
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pout " second_size : $second_size"
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[ $dtb_size -gt 0 ] && pout " dtb size : $dtb_size"
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pout " base : $base_addr"
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pout " kernel offset : $kernel_offset"
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pout " ramdisk offset : $ramdisk_offset"
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[ -z $second_offset ] || pout " second_offset : $second_offset"
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pout " tags offset : $tags_offset"
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[ $dtb_size -gt 0 ] && pout " dtb img : $dt"
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pout " cmd line : $cmd_line"
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}
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mkboot_img()
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{
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error=0
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if [ $dtb_size -gt 0 ]; then
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dtb="--dt ${dt}"
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fi
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$mkbootimg --kernel $kernel --ramdisk $ramdisk \
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--base $base_addr --ramdisk_offset $ramdisk_offset \
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--tags_offset $tags_offset --cmdline "$cmd_line" \
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--pagesize $page_size $dtb -o $new_img 2>/dev/null || error=1
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[ $error -eq 1 ] && return $error
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ramdisk_size=$($busybox stat -c "%s" $ramdisk)
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boot_size=$($busybox stat -c "%s" $new_img)
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pout "\nKernel size: $kernel_size, new ramdisk size: $ramdisk_size, $($busybox basename $new_img): $boot_size."
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pout "\n$($busybox basename $new_img) has been created.\n"
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}
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#decide action
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[ $# -lt 2 ] || [ $# -gt 3 ] && usage
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if [ $# -eq 2 ] && [ -d $1 ]; then
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mkboot_from_dir=1
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elif [ $# -eq 2 ] && [ -s $1 ]; then
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split_boot_to_dir=1
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else
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usage
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fi
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#mkboot_from_dir, img_info
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if [ ! -z $mkboot_from_dir ]; then
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pout "\nmkbootimg from $1/img_info.\n"
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unpacked_dir=$1
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new_img=$2
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cd $unpacked_dir
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if [ ! -s img_info ]; then
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pout "Missing img_info file! Can't rebuild $2."
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clean
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fi
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eval $(cat img_info)
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if [ -z $kernel ] || [ -z $ramdisk ] || [ -z $base_addr ]; then
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pout "Lacking parameters in img_info."
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clean
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fi
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[ -z $dtb_size ] && dtb_size=0
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if [ -d $ramdisk ]; then
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compression_type=$($file -m $magic ./ramdisk.* | $busybox cut -d: -f2 | $busybox cut -d" " -f2)
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compression_ext=$compression_type
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case $compression_type in
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gzip) compression_warning=$compression_type; compression_repack=$gzip;;
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xz) compression_warning=$compression_type; compression_repack="$xz -1 --check=crc32";;
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lzma) compression_warning=$compression_type; compression_repack="$xz --format=lzma";;
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lz4) compression_warning=$compression_type; compression_repack="$lz4 -l";;
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esac;
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if [ -z $compression_warning ]; then
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pout "\n****** HAZARD ******* HAZARD ******* HAZARD ******"
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pout "\nRamdisk is $compression_type format. Can't repack ramdisk."
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pout "This tool currently does not support $compression_type."
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pout "\n****** HAZARD ******* HAZARD ******* HAZARD ******\n"
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exit
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fi
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if [ $compression_type != "gzip" ]; then
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if [ $compression_type != "lzma" ]; then
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if [ $compression_type != "lz4" ]; then
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if [ $compression_type != "xz" ]; then
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pout "\nRamdisk is unknown format. Can't repack ramdisk."
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exit 0
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else
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# XZ
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$mkbootfs $ramdisk | $compression_repack > new_ramdisk.$compression_ext
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ramdisk=new_ramdisk.$compression_ext
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ramdisk_size=$($busybox stat -c "%s" $ramdisk)
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fi
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else
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# LZ4
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$mkbootfs $ramdisk | $compression_repack > new_ramdisk.$compression_ext
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ramdisk=new_ramdisk.$compression_ext
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ramdisk_size=$($busybox stat -c "%s" $ramdisk)
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fi
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else
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# LZMA using xz binary
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$mkbootfs $ramdisk | $compression_repack > new_ramdisk.$compression_ext
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ramdisk=new_ramdisk.$compression_ext
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ramdisk_size=$($busybox stat -c "%s" $ramdisk)
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fi
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else
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# GZIP
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$mkbootfs $ramdisk | $compression_repack > new_ramdisk.$compression_ext
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ramdisk=new_ramdisk.$compression_ext
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ramdisk_size=$($busybox stat -c "%s" $ramdisk)
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fi
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fi
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#cd $unpacked_dir
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print_info
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$busybox rm -f $new_img
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mkboot_img $new_img || perr "Make $new_img Error! pls check img_info file."
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#pout "Add SEANDROIDENFORCE tag."
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#printf SEANDROIDENFORCE >> $new_img
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$busybox rm -f new_ramdisk.gz
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clean
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fi
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#split boot.img to dir.
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if [ -e $2 ]; then
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read -p "$2 exists, delete?(N/y)" reply
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case $reply in
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y | Y)
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$busybox rm -rf $2
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;;
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*)
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exit
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;;
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esac
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fi
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tempdir=$2
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$busybox mkdir -p "$tempdir"
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pout "\nUnpack & decompress $1 to $2\n"
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#get boot.img info
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cp -f $1 $tempdir/
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cd $tempdir
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bootimg=$($busybox basename $1)
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offset=$($grep -abo ANDROID! $bootimg | $busybox cut -f 1 -d :)
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[ -z $offset ] && clean
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if [ $offset -gt 0 ]; then
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$busybox dd if=$bootimg of=bootimg bs=$offset skip=1 2>/dev/null
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bootimg=bootimg
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fi
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kernel_addr=0x$($od -A n -X -j 12 -N 4 $bootimg | $busybox sed 's/ //g' | $busybox sed 's/^0*//g')
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ramdisk_addr=0x$($od -A n -X -j 20 -N 4 $bootimg | $busybox sed 's/ //g' | $busybox sed 's/^0*//g')
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second_addr=0x$($od -A n -X -j 28 -N 4 $bootimg | $busybox sed 's/ //g' | $busybox sed 's/^0*//g')
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tags_addr=0x$($od -A n -X -j 32 -N 4 $bootimg | $busybox sed 's/ //g' | $busybox sed 's/^0*//g')
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kernel_size=$($od -A n -D -j 8 -N 4 $bootimg | $busybox sed 's/ //g')
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base_addr=0x$($od -A n -x -j 14 -N 2 $bootimg | $busybox sed 's/ //g')0000
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ramdisk_size=$($od -A n -D -j 16 -N 4 $bootimg | $busybox sed 's/ //g')
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second_size=$($od -A n -D -j 24 -N 4 $bootimg | $busybox sed 's/ //g')
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page_size=$($od -A n -D -j 36 -N 4 $bootimg | $busybox sed 's/ //g')
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dtb_size=$($od -A n -D -j 40 -N 4 $bootimg | $busybox sed 's/ //g')
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cmd_line=$($od -A n --strings -j 64 -N 512 $bootimg)
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kernel_offset=$((kernel_addr-base_addr))
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ramdisk_offset=$((ramdisk_addr-base_addr))
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second_offset=$((second_addr-base_addr))
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tags_offset=$((tags_addr-base_addr))
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#########################################################
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# BELOW SECTION HANDLES NON STANDARD IMAGES
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non_standard_base=$((tags_addr-0x00000100)) # Need this to get the TRUE Base Address
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non_standard_base_addr=$($busybox printf "0x%08x" $non_standard_base)
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base_addr_verify=$($busybox printf "0x%08x" $base_addr)
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base_addr=$($busybox printf "0x%08x" $base_addr)
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if [ $base_addr == $non_standard_base ]; then
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base_addr=$($busybox printf "0x%08x" $base_addr)
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else
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base_addr=$($busybox printf "0x%08x" $non_standard_base_addr)
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fi
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# Accurate offsets used on images with non standard mkbootimg.c
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kernel_offset_ns=$((kernel_addr-non_standard_base))
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ramdisk_offset_ns=$((ramdisk_addr-non_standard_base))
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second_offset_ns=$((second_addr-non_standard_base))
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tags_offset_ns=$((tags_addr-non_standard_base))
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# Do the Offsets match with the Base Address for standard mkbootimg.c?
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kernel_offset_s=$((kernel_addr-0x00008000))
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ramdisk_offset_s=$((ramdisk_addr-0x01000000))
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second_offset_s=$((second_addr-0x00f00000))
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tags_offset_s=$((tags_addr-0x00000100))
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if [ $non_standard_base -eq $kernel_offset_s ]; then
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kernel_offset=$($busybox printf "0x%08x" $kernel_offset)
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else
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kernel_offset_ns=$($busybox printf "0x%08x" $kernel_offset_ns)
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kernel_offset=$($busybox printf "0x%08x" $kernel_offset_ns)
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kernel_offset_warning=$kernel_offset_ns
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fi
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if [ $non_standard_base -eq $ramdisk_offset_s ]; then
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ramdisk_offset=$($busybox printf "0x%08x" $ramdisk_offset)
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else
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ramdisk_offset_ns=$($busybox printf "0x%08x" $ramdisk_offset_ns)
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ramdisk_offset=$($busybox printf "0x%08x" $ramdisk_offset_ns)
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ramdisk_offset_warning=$ramdisk_offset_ns
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fi
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if [ $non_standard_base -eq $second_offset_s ]; then
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second_offset=$($busybox printf "0x%08x" $second_offset)
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else
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second_offset_ns=$($busybox printf "0x%08x" $second_offset_ns)
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second_offset=$($busybox printf "0x%08x" $second_offset_ns)
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second_offset_warning=$second_offset_ns
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fi
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if [ $base_addr_verify != $non_standard_base_addr ]; then
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base_warning=$non_standard_base_addr
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fi
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tags_offset=$($busybox printf "0x%08x" $tags_offset_ns)
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# Below are the known offsets for non standard mkbootimg.c
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if [[ ! -z $kernel_offset_warning ]] || [[ ! -z $ramdisk_offset_warning ]] || [[ ! -z $second_offset_warning ]]; then
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pout "****** WARNING ******* WARNING ******* WARNING ******\n"
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pout "This image is built using NON-standard mkbootimg!\n"
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fi
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if [ ! -z $base_warning ]; then
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pout "BASE is $base_warning"
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fi
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if [ ! -z $kernel_offset_warning ]; then
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pout "KERNEL_OFFSET is $kernel_offset_ns"
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fi
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if [ ! -z $ramdisk_offset_warning ]; then
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pout "RAMDISK_OFFSET is $ramdisk_offset_ns"
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fi
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if [ ! -z $second_offset_warning ]; then
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pout "SECOND_OFFSET is $second_offset_ns"
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fi
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if [[ ! -z $kernel_offset_warning ]] || [[ ! -z $ramdisk_offset_warning ]] || [[ ! -z $second_offset_warning ]]; then
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pout "\nYou can modify mkbootimg.c with the above value(s)"
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pout "\n****** WARNING ******* WARNING ******* WARNING ******\n"
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fi
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# ABOVE SECTION HANDLES NON STANDARD IMAGES
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#########################################################
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k_count=$(((kernel_size+page_size-1)/page_size))
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r_count=$(((ramdisk_size+page_size-1)/page_size))
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s_count=$(((second_size+page_size-1)/page_size))
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d_count=$(((dtb_size+page_size-1)/page_size))
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k_offset=1
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r_offset=$((k_offset+k_count))
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s_offset=$((r_offset+r_count))
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d_offset=$((s_offset+s_count))
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#zImage
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$busybox dd if=$bootimg of=zImage_tmp bs=$page_size skip=$k_offset count=$k_count 2>/dev/null
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$busybox dd if=zImage_tmp of=zImage bs=$kernel_size count=1 2>/dev/null
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#ramdisk.gz
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$busybox dd if=$bootimg of=ramdisk_tmp bs=$page_size skip=$r_offset count=$r_count 2>/dev/null
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$busybox dd if=ramdisk_tmp of=ramdisk.gz bs=$ramdisk_size count=1 2>/dev/null
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#dtb
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if [ $dtb_size -gt 0 ]; then
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$busybox dd if=$bootimg of=dt.img_tmp bs=$page_size skip=$d_offset count=$d_count 2>/dev/null
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$busybox dd if=dt.img_tmp of=dt.img bs=$dtb_size count=1 2>/dev/null
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dt="$tempdir/dt.img"
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dt=$($busybox basename $dt)
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dt_name="dt=$dt\n"
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dt_size="dtb_size=$dtb_size\n"
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fi
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$busybox rm -f *_tmp $($busybox basename $1) $bootimg
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kernel=zImage
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ramdisk=ramdisk
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[ ! -s $kernel ] && clean
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#print boot.img info
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print_info
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#write info to img_info,decompression ramdisk.gz
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$busybox printf "kernel=zImage\nramdisk=ramdisk\n${dt_name}page_size=$page_size\n\
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kernel_size=$kernel_size\nramdisk_size=$ramdisk_size\n${dt_size}base_addr=$base_addr\nkernel_offset=$kernel_offset\n\
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ramdisk_offset=$ramdisk_offset\ntags_offset=$tags_offset\ncmd_line=\"$cmd_line\"\n" > img_info
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$busybox mkdir ramdisk
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cd ramdisk
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compression_type=$($file -m $magic ../ramdisk.gz | $busybox cut -d: -f2 | $busybox cut -d" " -f2)
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compression_warning=$compression_type
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case $compression_type in
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gzip) compression_type=$gzip; compression_ext=gz;;
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xz) compression_type=$xz; compression_ext=xz;;
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lzma) compression_type=$lzma; compression_ext=lzma;;
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lz4) compression_ext=lz4; decomp_ramdisk="$lz4 -d"; extra="< ../ramdisk.cpio";;
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esac;
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if [[ $compression_ext != "lz4" ]]; then
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decomp_ramdisk="$compression_type -d -c"
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fi
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decomp_ramdisk2="$cpio -i -d -m --no-absolute-filenames"
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if [ -z $compression_ext ]; then
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pout "\n****** HAZARD ******* HAZARD ******* HAZARD ******"
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pout "\nRamdisk is $compression_warning format. Can't unpack ramdisk."
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pout "This tool currently does not support $compression_warning."
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pout "\n****** HAZARD ******* HAZARD ******* HAZARD ******\n"
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exit
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fi
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$busybox mv ../ramdisk.gz ../ramdisk.$compression_ext # This is simply to remind the user if they view the folder afterwards
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pout "\nRamdisk is $compression_warning format."
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$decomp_ramdisk "../ramdisk.$compression_ext" | $decomp_ramdisk2 $extra
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#Unpack Finish to exit.
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pout "Unpack completed.\n"
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exit
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