Trace

[Jenkins, Clive]

The instruction that caused the fault is at this address:
> NIP [c0110ddc] init_dev+0x2bc/0x584

The hex value of the instruction is also highlighted between <> here:
> Instruction dump:
> 7d808120 4e800020 7c832378 4bfa9ea9 7c7f1b79 418201f0 a81e0062 2f800001 
> 409efd98 83ff00d0 2c1f0000 4182fd90 <801f00b8> 70090080 408201b0 801e0060 

Disassemble your kernel and look at offset 0x2BC relative to the label init_dev
 
________________________________

From: linuxppc-dev-bounces+clive.jenkins=xerox.com at ozlabs.org [mailto:linuxppc-dev-bounces+clive.jenkins=xerox.com at ozlabs.org] On Behalf Of Sébastien Chrétien
Sent: 01 September 2008 10:16
To: linuxppc-dev at ozlabs.org
Subject: Trace


Hello,

I am triying to write a tty_driver under ppc. And I get a kernel panic.
Can somebody explain me how finding the source of the error with a kernel panic trace : 
thanks

Unable to handle kernel paging request for data at address 0x575555f9
Faulting instruction address: 0xc0110ddc
Oops: Kernel access of bad area, sig: 11 [#1]
Modules linked in:
NIP: c0110ddc LR: c011118c CTR: 00000000
REGS: cf01bcb0 TRAP: 0300   Not tainted  (2.6.26)
MSR: 00009032 <EE,ME,IR,DR>  CR: 44002022  XER: 20000000
DAR: 575555f9, DSISR: 40000000
TASK = cf01c000[1] 'swapper' THREAD: cf01a000
GPR00: 0000000c cf01bd60 cf01c000 cf04c300 ffffffff cf01bdbc 00000000 c01d0000 
GPR08: 00001249 fffffffc 00000000 cf000420 84002022 00000000 10000b00 007fff00 
GPR16: 0fffa1d0 00000000 00000004 cf01bdbc 007ffec0 00000000 00000000 00800000 
GPR24: 00000000 c01b7650 00000002 c01d0000 ffffffff ce4a6700 cf04c300 57555541 
NIP [c0110ddc] init_dev+0x2bc/0x584
LR [c011118c] tty_open+0xe8/0x3e0
Call Trace:
[cf01bd60] [cf01bd78] 0xcf01bd78 (unreliable)
[cf01bdb0] [c011118c] tty_open+0xe8/0x3e0
[cf01bde0] [c00742c8] chrdev_open+0x114/0x1b0
[cf01be10] [c006fb5c] __dentry_open+0x190/0x2e8
[cf01be40] [c006fdac] nameidata_to_filp+0x38/0x70
[cf01be60] [c007bc60] do_filp_open+0x200/0x7d0
[cf01bf10] [c00700b4] do_sys_open+0x74/0x114
[cf01bf40] [c0003c94] init_post+0x34/0x258
[cf01bf60] [c019ca64] kernel_init+0x258/0x270
[cf01bff0] [c0011b3c] kernel_thread+0x44/0x60
Instruction dump:
7d808120 4e800020 7c832378 4bfa9ea9 7c7f1b79 418201f0 a81e0062 2f800001 
409efd98 83ff00d0 2c1f0000 4182fd90 <801f00b8> 70090080 408201b0 801e0060 
---[ end trace b7795a387aeb7786 ]---
Kernel panic - not syncing: Attempted to kill init!
allocation failed: out of vmalloc space - use vmalloc=<size> to increase size.