Samsung S9 Boot.img -

| Section | Description | |---------|-------------| | | Standard Android boot image header (size, kernel address, ramdisk address, etc.) | | Kernel | Image or zImage – the Linux kernel for Exynos 9810 | | Ramdisk | Gzipped CPIO archive with root filesystem used in early boot | | DTB (Device Tree Blob) | Hardware description for Exynos 9810 (sometimes separate in dtb.img ) | | Samsung Signature | Cryptographic signature (Samsung's signature_blob ) for verified boot |

dd if=/dev/block/by-name/boot of=/sdcard/boot.img On a rooted S9, you can pull it via adb pull /sdcard/boot.img . Use bootimg-tools or magiskboot (from Magisk) to unpack: samsung s9 boot.img

A typical boot.img contains: