|-- sergiusens@lindon:~ --|
$ sudo mount /dev/sdb8 /mnt

|-- sergiusens@lindon:~ --|
$ find /mnt
/mnt
/mnt/uboot.env
/mnt/dtbs
/mnt/snappy-system.txt
/mnt/96boards-kernel.sideload_IOOTBPRUSVGG.snap
/mnt/96boards-kernel.sideload_IOOTBPRUSVGG.snap/initrd.img
/mnt/96boards-kernel.sideload_IOOTBPRUSVGG.snap/Image
/mnt/install.yaml

|-- sergiusens@lindon:~ --|
$ unsquashfs -l ~/envs/test-kernel-snap/96boards-kernel_4.4.0_arm64.snap |grep -v modules | grep -v firmware
Parallel unsquashfs: Using 4 processors
4320 inodes (22981 blocks) to write

squashfs-root
squashfs-root/Image-4.4.0-96boards+
squashfs-root/System.map-4.4.0-96boards+
squashfs-root/dtbs
squashfs-root/dtbs/apq8016-sbc.dtb
squashfs-root/dtbs/msm8916-mtp.dtb
squashfs-root/initrd-4.4.0-96boards+.img
squashfs-root/initrd.img
squashfs-root/lib
squashfs-root/meta
squashfs-root/meta/snap.yaml
squashfs-root/vmlinuz

|-- sergiusens@lindon:~ --|
$ unsquashfs ~/envs/test-kernel-snap/96boards-kernel_4.4.0_arm64.snap meta/snap.yaml
Parallel unsquashfs: Using 4 processors
1 inodes (1 blocks) to write

[===================================================================|] 1/1 100%

created 1 files
created 2 directories
created 0 symlinks
created 0 devices
created 0 fifos

|-- sergiusens@lindon:~ --|
$ cat squashfs-root/meta/snap.yaml 
architectures:
- arm64
description: This is the reference kernel from 96boards
name: 96boards-kernel
summary: An 96boards kernel built from source
type: kernel
version: 4.4.0

kernel: Image-4.4.0-96boards+
initrd: initrd.img
modules: lib/modules/4.4.0-96boards+
firmware: lib/firmware