My experiences with Qemu - Part II

So I've managed to get this far with Qemu:

(qemu) Uncompressing Linux......................................................... done, booting the kernel.
Linux version 2.6.20.6 (cfriedt@sith) (gcc version 3.4.4) #35 Thu May 31 21:57:50 CEST 2007
CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00003137
Machine: ARM-Versatile PB
Memory policy: ECC disabled, Data cache writeback
CPU0: D VIVT write-through cache
CPU0: I cache: 4096 bytes, associativity 4, 32 byte lines, 32 sets
CPU0: D cache: 65536 bytes, associativity 4, 32 byte lines, 512 sets
Built 1 zonelists. Total pages: 65024
Kernel command line: root=/dev/nfs nfsroot=192.168.7.1:/usr/gentoo_root,uid=0,gid=0,rsize=32768,wsize=32768,timeo=14,nfsvers=3,rw rw ip=192.168.7.2:192.168.7.1:192.168.7.1:255.255.255.0:qemu console=ttyAMA0,115200
PID hash table entries: 1024 (order: 10, 4096 bytes)
Console: colour dummy device 80x30
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 256MB = 256MB total
Memory: 258048KB available (1516K code, 174K data, 100K init)
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
NET: Registered protocol family 16
PCI core found (slot 11)
PCI: bus0: Fast back to back transfers disabled
PCI map irq: slot 0, pin 1, devslot 12, irq: 27
NET: Registered protocol family 2
IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 3, 32768 bytes)
TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
TCP: Hash tables configured (established 8192 bind 4096)
TCP reno registered
NetWinder Floating Point Emulator V0.97 (double precision)
CLCD: unknown LCD panel ID 0x00001000, using VGA
CLCD: Versatile hardware, VGA display
Clock CLCDCLK: setting VCO reg params: S=1 R=99 V=98
Console: switching to colour frame buffer device 80x30
Serial: AMBA PL011 UART driver
dev:f1: ttyAMA0 at MMIO 0x101f1000 (irq = 12) is a AMBA/PL011
dev:f2: ttyAMA1 at MMIO 0x101f2000 (irq = 13) is a AMBA/PL011
dev:f3: ttyAMA2 at MMIO 0x101f3000 (irq = 14) is a AMBA/PL011
fpga:09: ttyAMA3 at MMIO 0x10009000 (irq = 38) is a AMBA/PL011
tun: Universal TUN/TAP device driver, 1.6
tun: (C) 1999-2004 Max Krasnyansky
smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre
eth0: SMC91C11xFD (rev 1) at d080a000 IRQ 25 [nowait]
eth0: Ethernet addr: 52:54:00:12:34:56
mice: PS/2 mouse device common for all mice
TCP cubic registered
ieee80211: 802.11 data/management/control stack, git-1.1.13
ieee80211: Copyright (C) 2004-2005 Intel Corporation
input: AT Raw Set 2 keyboard as /class/input/input0
eth0: link up
input: ImExPS/2 Generic Explorer Mouse as /class/input/input1
IP-Config: Complete:
device=eth0, addr=192.168.7.2, mask=255.255.255.0, gw=192.168.7.1,
host=qemu, domain=, nis-domain=(none),
bootserver=192.168.7.1, rootserver=192.168.7.1, rootpath=
Root-NFS: unknown option: uid=0
Looking up port of RPC 100003/2 on 192.168.7.1
Looking up port of RPC 100005/1 on 192.168.7.1
VFS: Mounted root (nfs filesystem).
Freeing init memory: 100K
init: must be superuser.
Kernel panic - not syncing: Attempted to kill init!

It's looking fairly bright now ;-) All I have to do is figure out why (this has absolutely no real reason) Linux would start up as someone who isn't the superuser
... hmmf..

Weeee !!! I just added an init= option to the 'append' section of Qemu!!! sahweet!!! She's ready to roll ;-)

The option to enable 16-bit UID system calls must be selected as well, otherwise root (0) will get mapped to 0xffffffff (-1 in 2's compliment == -EPERM).