Custom Initramfs does not boot
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I built a custom initramfs on an udoo-neo using the following instructions:
mkdir -p /usr/src/initramfs/bin,dev,etc,lib,lib64,mnt/root,proc,root,sbin,sys
cp -a /dev/null,console,tty,mmcblk0p2 /usr/src/initramfs/dev/
sudo apt-get install busybox-static
cp -a /bin/busybox /usr/src/initramfs/bin/busybox
My init file is:
#!/bin/busybox sh
# Mount the /proc and /sys filesystems.
mount -t proc none /proc
mount -t sysfs none /sys
# Do your stuff here.
echo "This script just mounts and boots the rootfs, nothing else!"
# Mount the root filesystem.
mount -o ro /dev/mmcblk0p2/mnt/root
# Clean up.
umount /proc
umount /sys
# Boot the real thing.
exec switch_root /mnt/root /sbin/init
And then I do
chmod +x /usr/src/initramfs/init
After setting the initramfs source file to "/usr/src/initramfs", rebuilding, copying it back to the SD card and rebooting, i just boot into my normal screen, and the echo message does not appear. I've checked if zImage is being written properly (it is). How can I fix this?
linux-kernel initramfs
asked Jul 19 at 15:49
JHarden13
383
add a comment |Â
up vote
0
down vote
favorite
I built a custom initramfs on an udoo-neo using the following instructions:
mkdir -p /usr/src/initramfs/bin,dev,etc,lib,lib64,mnt/root,proc,root,sbin,sys
cp -a /dev/null,console,tty,mmcblk0p2 /usr/src/initramfs/dev/
sudo apt-get install busybox-static
cp -a /bin/busybox /usr/src/initramfs/bin/busybox
My init file is:
#!/bin/busybox sh
# Mount the /proc and /sys filesystems.
mount -t proc none /proc
mount -t sysfs none /sys
# Do your stuff here.
echo "This script just mounts and boots the rootfs, nothing else!"
# Mount the root filesystem.
mount -o ro /dev/mmcblk0p2/mnt/root
# Clean up.
umount /proc
umount /sys
# Boot the real thing.
exec switch_root /mnt/root /sbin/init
And then I do
chmod +x /usr/src/initramfs/init
After setting the initramfs source file to "/usr/src/initramfs", rebuilding, copying it back to the SD card and rebooting, i just boot into my normal screen, and the echo message does not appear. I've checked if zImage is being written properly (it is). How can I fix this?
linux-kernel initramfs
asked Jul 19 at 15:49
JHarden13
383
open the initram, and check it. it is a regular arquive, maybe cpio to open it, cant remember.
– Rui F Ribeiro
Jul 19 at 17:45
its a .gz file, and it contains all the files in /usr/src/initramfs
– JHarden13
Jul 19 at 20:29
So, are all the files there? Are you running update-grub after creating the initrd btw?
– Rui F Ribeiro
Jul 19 at 20:29
All the files are there, and the udoo-neo doesn't use grub. I copy the zImage and dts files to the bootable SD card and it works. The zImage is also being overwritten, I checked.
– JHarden13
Jul 19 at 20:41
add a comment |Â
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I built a custom initramfs on an udoo-neo using the following instructions:
mkdir -p /usr/src/initramfs/bin,dev,etc,lib,lib64,mnt/root,proc,root,sbin,sys
cp -a /dev/null,console,tty,mmcblk0p2 /usr/src/initramfs/dev/
sudo apt-get install busybox-static
cp -a /bin/busybox /usr/src/initramfs/bin/busybox
My init file is:
#!/bin/busybox sh
# Mount the /proc and /sys filesystems.
mount -t proc none /proc
mount -t sysfs none /sys
# Do your stuff here.
echo "This script just mounts and boots the rootfs, nothing else!"
# Mount the root filesystem.
mount -o ro /dev/mmcblk0p2/mnt/root
# Clean up.
umount /proc
umount /sys
# Boot the real thing.
exec switch_root /mnt/root /sbin/init
And then I do
chmod +x /usr/src/initramfs/init
After setting the initramfs source file to "/usr/src/initramfs", rebuilding, copying it back to the SD card and rebooting, i just boot into my normal screen, and the echo message does not appear. I've checked if zImage is being written properly (it is). How can I fix this?
linux-kernel initramfs
asked Jul 19 at 15:49
JHarden13
383
I built a custom initramfs on an udoo-neo using the following instructions:
mkdir -p /usr/src/initramfs/bin,dev,etc,lib,lib64,mnt/root,proc,root,sbin,sys
cp -a /dev/null,console,tty,mmcblk0p2 /usr/src/initramfs/dev/
sudo apt-get install busybox-static
cp -a /bin/busybox /usr/src/initramfs/bin/busybox
My init file is:
#!/bin/busybox sh
# Mount the /proc and /sys filesystems.
mount -t proc none /proc
mount -t sysfs none /sys
# Do your stuff here.
echo "This script just mounts and boots the rootfs, nothing else!"
# Mount the root filesystem.
mount -o ro /dev/mmcblk0p2/mnt/root
# Clean up.
umount /proc
umount /sys
# Boot the real thing.
exec switch_root /mnt/root /sbin/init
And then I do
chmod +x /usr/src/initramfs/init
After setting the initramfs source file to "/usr/src/initramfs", rebuilding, copying it back to the SD card and rebooting, i just boot into my normal screen, and the echo message does not appear. I've checked if zImage is being written properly (it is). How can I fix this?
linux-kernel initramfs
asked Jul 19 at 15:49
JHarden13
383
asked Jul 19 at 15:49
JHarden13
383
asked Jul 19 at 15:49
JHarden13
383
asked Jul 19 at 15:49
JHarden13
383
383
open the initram, and check it. it is a regular arquive, maybe cpio to open it, cant remember.
– Rui F Ribeiro
Jul 19 at 17:45
its a .gz file, and it contains all the files in /usr/src/initramfs
– JHarden13
Jul 19 at 20:29
So, are all the files there? Are you running update-grub after creating the initrd btw?
– Rui F Ribeiro
Jul 19 at 20:29
All the files are there, and the udoo-neo doesn't use grub. I copy the zImage and dts files to the bootable SD card and it works. The zImage is also being overwritten, I checked.
– JHarden13
Jul 19 at 20:41
add a comment |Â
open the initram, and check it. it is a regular arquive, maybe cpio to open it, cant remember.
– Rui F Ribeiro
Jul 19 at 17:45
its a .gz file, and it contains all the files in /usr/src/initramfs
– JHarden13
Jul 19 at 20:29
So, are all the files there? Are you running update-grub after creating the initrd btw?
– Rui F Ribeiro
Jul 19 at 20:29
All the files are there, and the udoo-neo doesn't use grub. I copy the zImage and dts files to the bootable SD card and it works. The zImage is also being overwritten, I checked.
– JHarden13
Jul 19 at 20:41
open the initram, and check it. it is a regular arquive, maybe cpio to open it, cant remember.
– Rui F Ribeiro
Jul 19 at 17:45
open the initram, and check it. it is a regular arquive, maybe cpio to open it, cant remember.
– Rui F Ribeiro
Jul 19 at 17:45
its a .gz file, and it contains all the files in /usr/src/initramfs
– JHarden13
Jul 19 at 20:29
its a .gz file, and it contains all the files in /usr/src/initramfs
– JHarden13
Jul 19 at 20:29
So, are all the files there? Are you running update-grub after creating the initrd btw?
– Rui F Ribeiro
Jul 19 at 20:29
So, are all the files there? Are you running update-grub after creating the initrd btw?
– Rui F Ribeiro
Jul 19 at 20:29
All the files are there, and the udoo-neo doesn't use grub. I copy the zImage and dts files to the bootable SD card and it works. The zImage is also being overwritten, I checked.
– JHarden13
Jul 19 at 20:41
All the files are there, and the udoo-neo doesn't use grub. I copy the zImage and dts files to the bootable SD card and it works. The zImage is also being overwritten, I checked.
– JHarden13
Jul 19 at 20:41
add a comment |Â
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open the initram, and check it. it is a regular arquive, maybe cpio to open it, cant remember.
– Rui F Ribeiro
Jul 19 at 17:45
its a .gz file, and it contains all the files in /usr/src/initramfs
– JHarden13
Jul 19 at 20:29
So, are all the files there? Are you running update-grub after creating the initrd btw?
– Rui F Ribeiro
Jul 19 at 20:29
All the files are there, and the udoo-neo doesn't use grub. I copy the zImage and dts files to the bootable SD card and it works. The zImage is also being overwritten, I checked.
– JHarden13
Jul 19 at 20:41