Skip to content

PREBUILD_INSTRUCTIONS.md

Latest commit

 

History

History
183 lines (137 loc) · 5.04 KB

PREBUILD_INSTRUCTIONS.md

File metadata and controls

183 lines (137 loc) · 5.04 KB
Raw

Prebuilt Files Preparation Instructions for Honor 50 SE (JLH-AN00)

Required Prebuilt Files

Before building TWRP or OrangeFox Recovery, you need to prepare the following prebuilt files:

prebuilt/
├── kernel          # Prebuilt kernel Image.gz-dtb
└── dtb/
    └── mt6877-jlh-an00.dtb  # Device tree blob

Source Files Location

The source files are located in:

C:\Users\Administrator\Desktop\iflow\extracted_images\

Files Available

From the extracted images, you have:

  • boot_a.img - Boot kernel image (30MB)
  • recovery_a.img - Recovery kernel image (45MB)
  • recovery_ramdisk_a.img - Recovery ramdisk (32MB)
  • recovery_vendor_a.img - Recovery vendor partition (24MB)
  • vendor_boot_a.img - Vendor boot image (64MB)
  • ramdisk_a.img - Ramdisk image (2MB)

Extraction Instructions

Option 1: Extract from boot_a.img (Recommended for TWRP)

  1. Install MagiskBoot:

    # Download magiskboot from: https://github.com/topjohnwu/Magisk/releases
# Place magiskboot.exe in the same directory as the images

  2. Extract kernel from boot_a.img:

    cd C:\Users\Administrator\Desktop\iflow\extracted_images
magiskboot.exe unpack boot_a.img

# The extraction will create:
# - kernel  -> Copy to twrp_jlh_an00/prebuilt/kernel
# - dtb     -> Copy to twrp_jlh_an00/prebuilt/dtb/mt6877-jlh-an00.dtb

  3. Copy the extracted files:

    copy kernel C:\Users\Administrator\Desktop\iflow\twrp_jlh_an00\prebuilt\kernel
copy dtb C:\Users\Administrator\Desktop\iflow\twrp_jlh_an00\prebuilt\dtb\mt6877-jlh-an00.dtb

Option 2: Extract from recovery_a.img (For OrangeFox)

  1. Extract kernel from recovery_a.img:

    cd C:\Users\Administrator\Desktop\iflow\extracted_images
magiskboot.exe unpack recovery_a.img

# The extraction will create:
# - kernel  -> Copy to twrp_jlh_an00/prebuilt/kernel
# - dtb     -> Copy to twrp_jlh_an00/prebuilt/dtb/mt6877-jlh-an00.dtb
# - ramdisk -> Contains recovery ramdisk

  2. Copy the extracted files:

    copy kernel C:\Users\Administrator\Desktop\iflow\twrp_jlh_an00\prebuilt\kernel
copy dtb C:\Users\Administrator\Desktop\iflow\twrp_jlh_an00\prebuilt\dtb\mt6877-jlh-an00.dtb

Option 3: Extract from vendor_boot_a.img (Alternative)

  1. Extract from vendor_boot_a.img: 
    cd C:\Users\Administrator\Desktop\iflow\extracted_images
magiskboot.exe unpack vendor_boot_a.img

# Extract vendor dtb if present
copy dtb C:\Users\Administrator\Desktop\iflow\twrp_jlh_an00\prebuilt\dtb\mt6877-jlh-an00.dtb

Build from Kernel Source (Advanced)

If you want to build the kernel from source:

  1. Navigate to kernel source:

    cd C:\Users\Administrator\Desktop\iflow\Code_Opensource\kernel

  2. Configure and build:

    # Set architecture
export ARCH=arm64
export CROSS_COMPILE=aarch64-linux-android-

# Use the defconfig for Honor 50 SE
make k6877v1_64_defconfig

# Build kernel
make Image.gz-dtb -j8

# Build device tree
make dtbs

# Copy the built files
cp arch/arm64/boot/Image.gz C:\Users\Administrator\Desktop\iflow\twrp_jlh_an00\prebuilt\kernel
cp arch/arm64/boot/dts/mediatek/mt6877-jlh-an00.dtb C:\Users\Administrator\Desktop\iflow\twrp_jlh_an00\prebuilt\dtb\mt6877-jlh-an00.dtb

Verification

After extraction, verify the files:

# Check kernel file size (should be around 10-30MB)
dir C:\Users\Administrator\Desktop\iflow\twrp_jlh_an00\prebuilt\kernel

# Check DTB file size (should be around 100-500KB)
dir C:\Users\Administrator\Desktop\iflow\twrp_jlh_an00\prebuilt\dtb\mt6877-jlh-an00.dtb

Build Commands

Once prebuilt files are ready, you can build:

Build TWRP:

cd <android_source_root>
source build/envsetup.sh
lunch twrp_jlhs-eng
mka recoveryimage

Build OrangeFox:

cd <android_source_root>
source build/envsetup.sh
lunch ofox_jlhs-eng
mka recoveryimage

Output Location

The recovery images will be output to:

out/target/product/jlhs/recovery.img

Troubleshooting

Kernel not found:

  • Ensure you extracted from the correct image (boot_a.img or recovery_a.img)
  • Verify magiskboot is properly installed
  • Check that the extraction was successful

DTB not found:

  • Some images have DTB embedded in the kernel
  • Use magiskboot to verify contents: magiskboot.exe unpack boot_a.img
  • If DTB is embedded, use magiskboot.exe dtb boot_a.img to extract

Build fails:

  • Verify all prebuilt files are present
  • Check file permissions
  • Ensure kernel architecture matches (arm64)

Additional Resources

Notes

  • Always backup your original images before extraction
  • Use the kernel from the same Android version as your target recovery
  • For Honor 50 SE, the recommended source is boot_a.img for TWRP and recovery_a.img for OrangeFox
  • The device uses A/B partitions, ensure you use the _a partition files