loicpoulain/dbootimg

Dragonboard Boot Image tool

dbootimg - manipulate Dragonboard Boot Images.

Usage

dbootimg <abootimg> <--extract|--update|--info> <blobtype> [--out outfile]

dbootimg can work on boot image file or block device.

Dragonboard boot image format

+-----------------+
| boot header.....| 1 page
+-----------------+
| kernel.gz + DTB.| n pages
+-----------------+
| ramdisk.........| m pages
+-----------------+
| second stage....| o pages
+-----------------+

Examples

• Extract device-tree blob from boot partition (/dev/mmcblkp8)
  $ dbootimg /dev/mmcblkp8 -x dtb > dtb.img
  or
  $ dbootimg /dev/mmcblkp8 -x dtb -o dtb.img

• Update boot partition with new device-tree blob
  $ cat dtb.img | dbootimg /dev/mmcblkp8 -u dtb
  or
  $ dbootimg /dev/mmcblkp8 -u dtb dtb.img

• Update command line
  $ dbootimg /dev/mmcblkp8 -u cmdline "root=/dev/mmcblk0p10 console=ttyMSM0,115200n8"

• Update kernel (Linux, u-boot...)
  $ dbootimg /dev/mmcblkp8 -u kernel Image.gz
  or
  $ gzip Image -c | dbootimg /dev/mmcblkp8 -u kernel