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Reinstall existing boot.img using mkbootimg (cyanogenmod 12.1, lollipop)

This is a cross reference from xda-developers , hope someone here knows the solution. I am having trouble re-packaging the existing boot.img from CyanogenMod 12.1 (Lollipop 5.1) for d2spr (Sprint S3). The resulting image will not load. I built mkbootimg / unpackbootimg from the source found here: https://github.com/osm0sis/mkbootimg . Then I do the following:

$ mkdir boot2
$ ../unpackbootimg -i boot.img -o boot2
BOARD_KERNEL_CMDLINE androidboot.hardware=qcom user_debug=31 zcache androidboot.bootdevice=msm_sdcc.1
BOARD_KERNEL_BASE 80200000
BOARD_NAME 
BOARD_PAGE_SIZE 2048
BOARD_KERNEL_OFFSET 00008000
BOARD_RAMDISK_OFFSET 01500000
BOARD_TAGS_OFFSET 00000100

This decompresses boot.img into:

$ ls -l boot2
total 7360
-rw-rw---- 1 galets galets       9 Apr 22 08:59 boot.img-base
-rw-rw---- 1 galets galets       1 Apr 22 08:59 boot.img-board
-rw-rw---- 1 galets galets      81 Apr 22 08:59 boot.img-cmdline
-rw-rw---- 1 galets galets       9 Apr 22 08:59 boot.img-kerneloff
-rw-rw---- 1 galets galets       5 Apr 22 08:59 boot.img-pagesize
-rw-rw---- 1 galets galets  663238 Apr 22 08:59 boot.img-ramdisk.gz
-rw-rw---- 1 galets galets       9 Apr 22 08:59 boot.img-ramdiskoff
-rw-rw---- 1 galets galets       9 Apr 22 08:59 boot.img-tagsoff
-rw-rw---- 1 galets galets 6842760 Apr 22 08:59 boot.img-zImage

Then I repack the files without any changes:

$ ../mkbootimg --kernel boot2/boot.img-zImage \
>              --ramdisk boot2/boot.img-ramdisk.gz \
>              --cmdline "androidboot.hardware=qcom user_debug=31 zcache androidboot.bootdevice=msm_sdcc.1" \
>              --base 0x80200000 \
>              --pagesize 2048 \
>              --output boot2.img
$ ../boot_info boot2.img 
Page size: 2048 (0x00000800)
Kernel size: 6842760 (0x00686988)
Ramdisk size: 663238 (0x000a1ec6)
Second size: 0 (0x00000000)
Board name: 
Command line: 'androidboot.hardware=qcom user_debug=31 zcache androidboot.bootdevice=msm_sdcc.1'
Base address: 2149580800 (0x80200000)

For comparison, the initial download:

$ ../boot_info boot.img 
Page size: 2048 (0x00000800)
Kernel size: 6842760 (0x00686988)
Ramdisk size: 663238 (0x000a1ec6)
Second size: 0 (0x00000000)
Board name: 
Command line: 'androidboot.hardware=qcom user_debug=31 zcache androidboot.bootdevice=msm_sdcc.1'
Base address: 2149580800 (0x80200000)

Everything seems beautiful. Then I ran it:

$ heimdall flash --BOOT boot2.img 
Heimdall v1.4.0

Copyright (c) 2010-2013, Benjamin Dobell, Glass Echidna
http://www.glassechidna.com.au/

This software is provided free of charge. Copying and redistribution is
encouraged.

If you appreciate this software and you would like to support future
development please consider donating:
http://www.glassechidna.com.au/donate/

Initialising connection...
Detecting device...
Claiming interface...
Attempt failed. Detaching driver...
Claiming interface again...
Setting up interface...

Initialising protocol...
Protocol initialisation successful.

Beginning session...

Some devices may take up to 2 minutes to respond.
Please be patient!

Session begun.

Downloading device PIT file...
PIT file download successful.

Uploading BOOT
100%
BOOT upload successful

Ending session...
Rebooting device...
Releasing device interface...
Re-attaching kernel driver...

and the device will not boot. Help!

EDIT : here is the hexadecimal dump of the start of two images:

$ hexdump -C boot.img | more
00000000  41 4e 44 52 4f 49 44 21  88 69 68 00 00 80 20 80  |ANDROID!.ih... .|
00000010  c6 1e 0a 00 00 00 70 81  00 00 00 00 00 00 10 81  |......p.........|
00000020  00 01 20 80 00 08 00 00  00 00 00 00 00 00 00 00  |.. .............|
00000030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040  61 6e 64 72 6f 69 64 62  6f 6f 74 2e 68 61 72 64  |androidboot.hard|
00000050  77 61 72 65 3d 71 63 6f  6d 20 75 73 65 72 5f 64  |ware=qcom user_d|
00000060  65 62 75 67 3d 33 31 20  7a 63 61 63 68 65 20 61  |ebug=31 zcache a|
00000070  6e 64 72 6f 69 64 62 6f  6f 74 2e 62 6f 6f 74 64  |ndroidboot.bootd|
00000080  65 76 69 63 65 3d 6d 73  6d 5f 73 64 63 63 2e 31  |evice=msm_sdcc.1|
00000090  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000240  bc 67 a2 74 d6 d0 01 0e  b4 56 47 6f bd ad 4d 85  |.g.t.....VGo..M.|
00000250  30 c1 ee 43 00 00 00 00  00 00 00 00 00 00 00 00  |0..C............|
00000260  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000800  00 00 a0 e1 00 00 a0 e1  00 00 a0 e1 00 00 a0 e1  |................|
*
00000820  02 00 00 ea 18 28 6f 01  00 00 00 00 88 69 68 00  |.....(o......ih.|
00000830  01 70 a0 e1 00 00 30 e3  00 80 a0 11 02 80 a0 01  |.p....0.........|
00000840  20 30 9f e5 00 00 93 e5  1c 10 9f e5 01 00 30 e1  | 0............0.|
00000850  06 00 00 1a 00 00 a0 e3  00 00 83 e5 0c 00 93 e5  |................|
00000860  08 10 93 e5 04 f0 93 e5  00 f0 ff ff 07 b0 5d 4a  |..............]J|
00000870  00 20 0f e1 03 00 12 e3  01 00 00 1a 17 00 a0 e3  |. ..............|
00000880  56 34 12 ef 00 20 0f e1  c0 20 82 e3 02 f0 21 e1  |V4... ... ....!.|
00000890  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000008a0  5c 41 9f e5 65 00 00 eb  57 0f 8f e2 4e 1c 90 e8  |\A..e...W...N...|


$ hexdump -C boot2.img | more
00000000  41 4e 44 52 4f 49 44 21  88 69 68 00 00 80 20 80  |ANDROID!.ih... .|
00000010  c6 1e 0a 00 00 00 20 81  00 00 00 00 00 00 10 81  |...... .........|
00000020  00 01 20 80 00 08 00 00  00 00 00 00 00 00 00 00  |.. .............|
00000030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040  61 6e 64 72 6f 69 64 62  6f 6f 74 2e 68 61 72 64  |androidboot.hard|
00000050  77 61 72 65 3d 71 63 6f  6d 20 75 73 65 72 5f 64  |ware=qcom user_d|
00000060  65 62 75 67 3d 33 31 20  7a 63 61 63 68 65 20 61  |ebug=31 zcache a|
00000070  6e 64 72 6f 69 64 62 6f  6f 74 2e 62 6f 6f 74 64  |ndroidboot.bootd|
00000080  65 76 69 63 65 3d 6d 73  6d 5f 73 64 63 63 2e 31  |evice=msm_sdcc.1|
00000090  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000240  bc 67 a2 74 d6 d0 01 0e  b4 56 47 6f bd ad 4d 85  |.g.t.....VGo..M.|
00000250  30 c1 ee 43 00 00 00 00  00 00 00 00 00 00 00 00  |0..C............|
00000260  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000800  00 00 a0 e1 00 00 a0 e1  00 00 a0 e1 00 00 a0 e1  |................|
*
00000820  02 00 00 ea 18 28 6f 01  00 00 00 00 88 69 68 00  |.....(o......ih.|
00000830  01 70 a0 e1 00 00 30 e3  00 80 a0 11 02 80 a0 01  |.p....0.........|
00000840  20 30 9f e5 00 00 93 e5  1c 10 9f e5 01 00 30 e1  | 0............0.|
00000850  06 00 00 1a 00 00 a0 e3  00 00 83 e5 0c 00 93 e5  |................|
00000860  08 10 93 e5 04 f0 93 e5  00 f0 ff ff 07 b0 5d 4a  |..............]J|
00000870  00 20 0f e1 03 00 12 e3  01 00 00 1a 17 00 a0 e3  |. ..............|
00000880  56 34 12 ef 00 20 0f e1  c0 20 82 e3 02 f0 21 e1  |V4... ... ....!.|
00000890  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000008a0  5c 41 9f e5 65 00 00 eb  57 0f 8f e2 4e 1c 90 e8  |\A..e...W...N...|
+4
1

- , , 20 - 0x81200000 vs 0x81700000 - , 0x20 - , 0x70 - "p" .

bootimg.h,

struct boot_img_hdr {
unsigned char magic[BOOT_MAGIC_SIZE];

unsigned kernel_size;  /* size in bytes */
unsigned kernel_addr;  /* physical load addr */

unsigned ramdisk_size; /* size in bytes */
unsigned ramdisk_addr; /* physical load addr */

unsigned second_size;  /* size in bytes */
unsigned second_addr;  /* physical load addr */

8 , ramdisk_addr, ramdisk , .

, ​​ 0x80208000, ​​ 0x00686988, ramdisk 0x80700000 , 0x80200000, , , ramdisk 0x000a1ec6 , 0x00008000 , , , . , , , ramdisk , .

, , --ramdisk_offset <base offset>, . , , hexdump .

( diff, ), , .

+3

Source: https://habr.com/ru/post/1584079/

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