掌機 - M22Pro - 如何Extract zImage

$ binwalk spi.bin 
    DECIMAL       HEXADECIMAL     DESCRIPTION
    --------------------------------------------------------------------------------
    23824         0x5D10          Android bootimg, kernel size: 1919249152 bytes, kernel addr: 0x5F6C656E, ramdisk size: 1919181921 bytes, ramdisk addr: 0xA78253A, product name: "load boot_image fail"
    320452        0x4E3C4         CRC32 polynomial table, little endian
    346626        0x54A02         Android bootimg, kernel size: 1836212480 bytes, kernel addr: 0x61003436, ramdisk size: 1711304050 bytes, ramdisk addr: 0x6563726F, product name: "vice"
    549560        0x862B8         Flattened device tree, size: 18254 bytes, version: 17
    808672        0xC56E0         DES SP1, little endian
    808928        0xC57E0         DES SP2, little endian
    815632        0xC7210         SHA256 hash constants, little endian
    842698        0xCDBCA         Unix path: /lib/libtomcrypt/hash.c
    843971        0xCE0C3         DES PC1 table
    844027        0xCE0FB         DES PC2 table
    876544        0xD6000         Flattened device tree, size: 60608 bytes, version: 17
    1179648       0x120000        Android bootimg, kernel size: 3901168 bytes, kernel addr: 0x40008000, ramdisk size: 12 bytes, ramdisk addr: 0x41000000, product name: "h133-p2nor"
    1181696       0x120800        Linux kernel ARM boot executable zImage (little-endian)
    1208467       0x127093        gzip compressed data, maximum compression, from Unix, last modified: 1970-01-01 00:00:00 (null date)
    5416448       0x52A600        PC bitmap, Windows 3.x format,, 480 x 480 x 24
    6346752       0x60D800        Squashfs filesystem, little endian, version 4.0, compression:xz, size: 10060760 bytes, 891 inodes, blocksize: 131072 bytes, created: 2024-11-29 02:25:52

$ dd if=spi.bin of=zImage bs=1 skip=1181696 count=$((5416448-1181696))
$ file zImage 
    zImage: Linux kernel ARM boot executable zImage (little-endian)

$ dd if=zImage of=head bs=1 count=26771
$ dd if=zImage of=body bs=1 skip=26771
$ zcat body > body_ext
    gzip: body: decompression OK, trailing garbage ignored

$ strings body_ext | grep Linux
    Linux version 5.4.61 (root@heyongsheng-X79-Invalid-entry-length-16-Fixed-up-to-11) (arm-openwrt-linux-muslgnueabi-gcc.bin (OpenWrt/Linaro GCC 6.4-2017.11 2017-11) 6.4.1, GNU ld (GNU Binutils) 2.27) #664 SMP PREEMPT Fri Oct 25 06:03:41 UTC 2024