customize rootfs and create kernel.itb with new rootfs

[minalnemade]

I am using ls1012aFRDM development board. I used following method to add my application executable file in rootfs

    1. rename your RAM disk image to rootfs.ext2.gz.uboot
    2. sudo apt-get install u-boot-tools
    3.dd if=rootfs.ext2.gz.uboot of=rootfs.ext2.gz bs=64 skip=1
    4. gunzip rootfs.ext2.gz
    5. mkdir /mnt/iso_1
    6. sudo mount -oloop rootfs.ext2 /mnt/iso_1
    7. Now, I copped files into appropriate location under “./mnt/iso_1” directory.
    8. sudo umount /mnt/iso_1
    9. gzip -9 rootfs.ext2
    10 mkimage -A arm64 -O linux -T ramdisk -C gzip -n 'rootfs.ext2.gz.uboot' -d rootfs.ext2.gz rootfs.ext2.gz.uboot

My questions are
1. Is the above method is correct.
2. How to create kernel.itb with this file system.
3. While create mkimage, What should be the Load Address and Entry Point address for rootfs and kernel image   
4. I also tried files/merge method, but it gives following error after performing bitbake fsl-image-core

WARNING: Duplicate inclusion for /home/nntechsol/source/yacto/QorIQ-SDK-V2.0-20160527-yocto/sources/meta-virtualization/conf/distro/include/virt_security_flags.inc in /home/nntechsol/source/yacto/QorIQ-SDK-V2.0-20160527-yocto/sources/meta-virtualization/conf/layer.conf
    ERROR: QA Issue: merge-files: Recipe inherits the allarch class, but has packaged architecture-specific binaries [arch]
    WARNING: QA Issue: /home/root/hello.elf_merge-files contained in package merge-files requires libc.so.6(GLIBC_2.2.5)(64bit), but no providers found in its RDEPENDS [file-rdeps]
    ERROR: QA run found fatal errors. Please consider fixing them.
    ERROR: Function failed: do_package_qa
    ERROR: Logfile of failure stored in: /home/nntechsol/source/yacto/QorIQ-SDK-V2.0-20160527-yocto/build_ls1012afrdm/tmp/work/all-fsl-linux/merge-files/1.0-r0/temp/log.do_package_qa.24128
    ERROR: Task 1288 (/home/nntechsol/source/yacto/QorIQ-SDK-V2.0-20160527-yocto/sources/meta-freescale/recipes-extended/merge-files/merge-files_1.0.bb, do_package_qa) failed with exit code '1'
    NOTE: Tasks Summary: Attempted 3491 tasks of which 3479 didn't need to be rerun and 1 failed.
    Waiting for 0 running tasks to finish:

    Summary: 1 task failed:
      /home/nntechsol/source/yacto/QorIQ-SDK-V2.0-20160527-yocto/sources/meta-freescale/recipes-extended/merge-files/merge-files_1.0.bb, do_package_qa
    Summary: There were 31 WARNING messages shown.
    Summary: There were 3 ERROR messages shown, returning a non-zero exit code.

So please suggest

Thanks
Minal

[danlenz]

Pavel  - thank you for he reply. I had updated the file name already to be correct for LSDK 19.03. My commands and associated output are shown below with step numbers prepended. I do not understand why the dd operation is performed on the compressed image. I think this is why I am getting the bad format error. Are the steps out of order?

Thanks,

Dan

cd flexbuild_lsdk1903/packages/rfs/ramdiskrfs

1 - $ sudo mv ramdisk_rootfs_arm64.ext4.gz ramdisk_rootfs_arm64.ext4.gz.uboot

3 - $ sudo dd if=ramdisk_rootfs_arm64.ext4.gz.uboot of=ramdisk_rootfs_arm64.ext4.gz bs=64 skip=1

  175728+1 records in
  175728+1 records out
  11246634 bytes (11 MB, 11 MiB) copied, 0.304536 s, 36.9 MB/s

4 - $ sudo gunzip ramdisk_rootfs_arm64.ext4.gz

  gzip: ramdisk_rootfs_arm64.ext4.gz: not in gzip format

[Pavel]

Use the following command:

sudo gunzip ramdisk_rootfs_arm64.ext4.gz

Have a great day,
Pavel Chubakov

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[danlenz]

Hello Minal / Pavel  - I attempted to use your method with LSDK 19.03 but after step 4 I get "gzip: ramdisk_rootfs_arm64.ext4.gz: not in gzip format" . Could either of you give more detail about what your are doing in steps 1-10 above so as to help me debug my error?

Thanks,
Dan

[Pavel]

1. Your method is correct.
2. Look at the following pages:

http://code.metager.de/source/xref/denx/u-boot/doc/uImage.FIT/howto.txt

and

http://manpages.ubuntu.com/manpages/xenial/man1/mkimage.1.html

and

https://linux.die.net/man/1/mkimage 

Use the following command:

mkimage -f kernel.its kernel.itb

3. See attached .its file.
4. Use the files/merge method for adding any text files.

Have a great day,
Pavel Chubakov

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