Kernel emulation with Qemu
===

I'm actually trying to emulate the linux kernel using Qemu and busybox.
So far I made this kernel image:
http://depositfiles.com/files/l9x9veg09
And launched Qemu using these arguments:
qemu-system-x86_64 -m 256 -s -hda rootfs.img -kernel linux-2.6.34.12/arch/x86/boot/bzImage -append "root=/dev/sda \ init=/bin/sh"
But once the kernel is launched I get a message saying:
Kernel Panic. No init found. Try passing init= option to kernel...
I though adding "init=/bin/sh" to the arguments would solve the problem but it didn't. I'm a begginer in this domain. Can someone help me with this? Thank you