help with kernel panic in qemu (arm)

larry7 · 07-30-2012, 08:13 AM

hi,

So i have been cross compiling a Linux kernel with a busy box file system and testing it with qemu. i am also building my own gcc cross compiler. here are the tools and Linux kernel used:

gmp-5.0.1.tar.bz2
binutils-2.21.1.tar.bz2
linux-3.0.36.tar.bz2
uClibc-0.9.31.tar.bz2
busybox-1.20.2.tar.bz2
gcc-4.7.0.tar.bz2
mpc-0.9.tar.gz
mpfr-3.0.0.tar.bz2

the target arm is a cortex a9 so the Linux kernel was configured with the vexpress_defconfig. busybox was configured with just defconfig and as a static binary. when qemu boots with this

qemu-system-arm -m 1024 -M vexpress-a9 -serial stdio -kernel zImage -initrd rootfs.img.gz -append "root=/dev/ram console=ttyAMA0 rdinit=/sbin/init user_debug=31"

this is what i get back where the panic occurred

Freeing init memory: 164K
pgd = bf8c0000
[00116004] *pgd=9f3da831, *pte=00000000, *ppte=00000000

Pid: 1, comm: init
CPU: 0 Not tainted (3.0.36 #13)
PC is at 0xd8c50
LR is at 0xd8bb0
pc : [<000d8c50>] lr : [<000d8bb0>] psr: 60000010
sp : 7eb68d08 ip : 00117000 fp : fffff000
r10: 00001000 r9 : 00116000 r8 : 0011493c
r7 : 00000000 r6 : 00001000 r5 : 00000018 r4 : 00114908
r3 : 00116000 r2 : 00001000 r1 : 00117000 r0 : 00000001
Flags: nZCv IRQs on FIQs on Mode USER_32 ISA ARM Segment user
Control: 10c53c7d Table: 9f8c006a DAC: 00000015
input: AT Raw Set 2 keyboard as /devices/mb:kmi0/serio0/input/input0
Kernel panic - not syncing: Attempted to kill init!
[<8003d55c>] (unwind_backtrace+0x0/0xf from [<80345ea4>] (panic+0x5c/0x17
[<80345ea4>] (panic+0x5c/0x17 from [<80055628>] (do_exit+0x658/0x70c)
[<80055628>] (do_exit+0x658/0x70c) from [<8005595c>] (do_group_exit+0x3c/0xcc)
[<8005595c>] (do_group_exit+0x3c/0xcc) from [<800607e8>] (get_signal_to_deliver+0x160/0x40c)
[<800607e8>] (get_signal_to_deliver+0x160/0x40c) from [<80039b1c>] (do_signal+0x64/0x534)
[<80039b1c>] (do_signal+0x64/0x534) from [<8003a588>] (do_notify_resume+0x38/0x44)
[<8003a588>] (do_notify_resume+0x38/0x44) from [<80036fd8>] (work_pending+0x24/0x2

I have have been trying to find some solution to this, but to no avail. any ideas are welcome.

thanks.