mirror of
https://github.com/topjohnwu/Magisk
synced 2024-11-13 20:54:12 +01:00
174 lines
6.0 KiB
Bash
174 lines
6.0 KiB
Bash
#!/system/bin/sh
|
|
##########################################################################################
|
|
#
|
|
# Magisk Boot Image Patcher
|
|
# by topjohnwu
|
|
#
|
|
# Usage: boot_patch.sh <bootimage>
|
|
#
|
|
# The following flags can be set in environment variables:
|
|
# KEEPVERITY, KEEPFORCEENCRYPT
|
|
#
|
|
# This script should be placed in a directory with the following files:
|
|
#
|
|
# File name Type Description
|
|
#
|
|
# boot_patch.sh script A script to patch boot. Expect path to boot image as parameter.
|
|
# (this file) The script will use binaries and files in its same directory
|
|
# to complete the patching process
|
|
# util_functions.sh script A script which hosts all functions requires for this script
|
|
# to work properly
|
|
# magiskinit binary The binary to replace /init, which has the magisk binary embedded
|
|
# magiskboot binary A tool to unpack boot image, decompress ramdisk, extract ramdisk,
|
|
# and patch the ramdisk for Magisk support
|
|
# chromeos folder This folder should store all the utilities and keys to sign
|
|
# (optional) a chromeos device. Used for Pixel C
|
|
#
|
|
# If the script is not running as root, then the input boot image should be a stock image
|
|
# or have a backup included in ramdisk internally, since we cannot access the stock boot
|
|
# image placed under /data we've created when previously installed
|
|
#
|
|
##########################################################################################
|
|
##########################################################################################
|
|
# Functions
|
|
##########################################################################################
|
|
|
|
# Pure bash dirname implementation
|
|
getdir() {
|
|
case "$1" in
|
|
*/*) dir=${1%/*}; [ -z $dir ] && echo "/" || echo $dir ;;
|
|
*) echo "." ;;
|
|
esac
|
|
}
|
|
|
|
##########################################################################################
|
|
# Initialization
|
|
##########################################################################################
|
|
|
|
if [ -z $SOURCEDMODE ]; then
|
|
# Switch to the location of the script file
|
|
cd "`getdir "${BASH_SOURCE:-$0}"`"
|
|
# Load utility functions
|
|
. ./util_functions.sh
|
|
fi
|
|
|
|
BOOTIMAGE="$1"
|
|
[ -e "$BOOTIMAGE" ] || abort "$BOOTIMAGE does not exist!"
|
|
|
|
# Flags
|
|
[ -z $KEEPVERITY ] && KEEPVERITY=false
|
|
[ -z $KEEPFORCEENCRYPT ] && KEEPFORCEENCRYPT=false
|
|
|
|
chmod -R 755 .
|
|
|
|
# Extract magisk if doesn't exist
|
|
[ -e magisk ] || ./magiskinit -x magisk magisk
|
|
|
|
##########################################################################################
|
|
# Unpack
|
|
##########################################################################################
|
|
|
|
CHROMEOS=false
|
|
|
|
ui_print "- Unpacking boot image"
|
|
./magiskboot --unpack "$BOOTIMAGE"
|
|
|
|
case $? in
|
|
1 )
|
|
abort "! Unable to unpack boot image"
|
|
;;
|
|
2 )
|
|
ui_print "- ChromeOS boot image detected"
|
|
CHROMEOS=true
|
|
;;
|
|
3 )
|
|
ui_print "! Sony ELF32 format detected"
|
|
abort "! Please use BootBridge from @AdrianDC to flash Magisk"
|
|
;;
|
|
4 )
|
|
ui_print "! Sony ELF64 format detected"
|
|
abort "! Stock kernel cannot be patched, please use a custom kernel"
|
|
esac
|
|
|
|
##########################################################################################
|
|
# Ramdisk restores
|
|
##########################################################################################
|
|
|
|
# Test patch status and do restore, after this section, ramdisk.cpio.orig is guaranteed to exist
|
|
ui_print "- Checking ramdisk status"
|
|
./magiskboot --cpio ramdisk.cpio test
|
|
case $? in
|
|
0 ) # Stock boot
|
|
ui_print "- Stock boot image detected"
|
|
ui_print "- Backing up stock boot image"
|
|
SHA1=`./magiskboot --sha1 "$BOOTIMAGE" 2>/dev/null`
|
|
STOCKDUMP=stock_boot_${SHA1}.img.gz
|
|
./magiskboot --compress "$BOOTIMAGE" $STOCKDUMP
|
|
cp -af ramdisk.cpio ramdisk.cpio.orig
|
|
;;
|
|
1 ) # Magisk patched
|
|
ui_print "- Magisk patched boot image detected"
|
|
# Find SHA1 of stock boot image
|
|
[ -z $SHA1 ] && SHA1=`./magiskboot --cpio ramdisk.cpio sha1 2>/dev/null`
|
|
./magiskboot --cpio ramdisk.cpio restore
|
|
cp -af ramdisk.cpio ramdisk.cpio.orig
|
|
;;
|
|
2 ) # Other patched
|
|
ui_print "! Boot image patched by unsupported programs"
|
|
abort "! Please restore stock boot image"
|
|
;;
|
|
esac
|
|
|
|
##########################################################################################
|
|
# Ramdisk patches
|
|
##########################################################################################
|
|
|
|
ui_print "- Patching ramdisk"
|
|
|
|
./magiskboot --cpio ramdisk.cpio \
|
|
"add 750 init magiskinit" \
|
|
"magisk ramdisk.cpio.orig $KEEPVERITY $KEEPFORCEENCRYPT $SHA1"
|
|
|
|
rm -f ramdisk.cpio.orig
|
|
|
|
##########################################################################################
|
|
# Binary patches
|
|
##########################################################################################
|
|
|
|
if ! $KEEPVERITY; then
|
|
[ -f dtb ] && ./magiskboot --dtb-patch dtb && ui_print "- Removing dm(avb)-verity in dtb"
|
|
[ -f extra ] && ./magiskboot --dtb-patch extra && ui_print "- Removing dm(avb)-verity in extra-dtb"
|
|
fi
|
|
|
|
if [ -f kernel ]; then
|
|
# Remove Samsung RKP
|
|
./magiskboot --hexpatch kernel \
|
|
49010054011440B93FA00F71E9000054010840B93FA00F7189000054001840B91FA00F7188010054 \
|
|
A1020054011440B93FA00F7140020054010840B93FA00F71E0010054001840B91FA00F7181010054
|
|
|
|
# Remove Samsung defex
|
|
# Before: [mrs x0, sp_el0] [mov w2, #-221] (-__NR_execve)
|
|
# After: [mrs x0, sp_el0] [mov w2, #-32768]
|
|
./magiskboot --hexpatch kernel \
|
|
004138D5821B8012 \
|
|
004138D5E2FF8F12
|
|
|
|
# Force kernel to load rootfs
|
|
# skip_initramfs -> want_initramfs
|
|
./magiskboot --hexpatch kernel \
|
|
736B69705F696E697472616D667300 \
|
|
77616E745F696E697472616D667300
|
|
fi
|
|
|
|
##########################################################################################
|
|
# Repack and flash
|
|
##########################################################################################
|
|
|
|
ui_print "- Repacking boot image"
|
|
./magiskboot --repack "$BOOTIMAGE" || abort "! Unable to repack boot image!"
|
|
|
|
# Sign chromeos boot
|
|
$CHROMEOS && sign_chromeos
|
|
|
|
./magiskboot --cleanup
|