Am 01.11.2016 um 15:15 schrieb Vered Zvi:
Hello,
Where should I run:
chroot /bin/busybox ?
under the host PC ?
Yes, under the host PC. I assume, host PC and target architecture for
initramfs are the same architecture, busybox is installed with all
necessary symlinks and the files are all residing in some directory
"/path/to/initramfs", then you execute
chroot /path/to/initramfs /bin/busybox
and probably afterwards:
chroot /path/to/initramfs /bin/ash
To get a shell in the initramfs and look around there. If the host and the
initramfs target are same architecture, but host is 64 bit and initramfs is 32
bit, you want to use:
linux32 chroot /path/to/initramfs /bin/busybox
Regards,
Mattias
Thank you,
Z.V
________________________________________
From: busybox [[email protected]] on behalf of Mattias Schlenker
[[email protected]]
Sent: Tuesday, November 01, 2016 2:58 PM
To: [email protected]
Subject: Re: Kernel panic - not syncing: No working init found
Am 01.11.2016 um 13:41 schrieb Vered Zvi:
Hello,
I'm working with kernel 3.18.24, busybox 1.24.2
/lib contains the following files:
ld-2.22.so
ld-linux-x86-64.so.2 -> ld-2.22.so
libc-2.22.so
libcrypt-2.22.so
libcrypt.so.1 -> libcrypt-2.22.so
libc.so.6 -> libc-2.22.so
libdl-2.22.so
libdl.so.2 -> libdl-2.22.so
libgcc_s.so
libgcc_s.so.1
libm-2.22.so
libm.so.6 -> libm-2.22.so
libpthread-2.22.so
libpthread.so.0 -> libpthread-2.22.so
libresolv-2.22.so
libresolv.so.2 -> libresolv-2.22.so
librt.so.1
libstdc++.so.6
libthread_db.so.1
libutil-2.22.so
libutil.so.1 -> libutil-2.22.so
/lib64 contains the following files:
ld-linux-x86-64.so.2 -> /lib/ld-2.9.so
libc.so.6 -> /lib/libc.so.6
libm.so.6 -> /lib/libm.so.6
Upon boot I'm getting:
Kernel panic - not syncing: No working init found. Try passing init=option
Are there any files missing ?
How can I debug such error ?
First: Put everything that's in your initramfs to a directory and try to
run busybox via chroot from outside, like "chroot /my/root/dir
/bin/busybox". You either get a list of compiled in applets or an error
telling you which files are missing.
Second: If that worked, try to run with "init=/bin/ash" to drop you to a
shell. In this shell you can mount filesystems and stuff... Make notes
Third: there should be a symlink /init -> /bin/busybox if you are
running busybox in inittab mode and of course an inittab and startup
scripts. If you are using busybox to pivot root you should use an
/linuxrc script to make sure the exec'ed init keeps PID 1.
If you want to see how to build a minimal BSD Gentoo like RC script
system upon busybox' inittab that is easily readable take a look at one
of my side projects - it should also explain which filesystems have to
be mounted when, how to invoke the dhcp client and stuff:
https://github.com/mschlenker/TinyCrossLinux
Regards,
Mattias
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