kernel trap on AU1200

[tom...@gmail.com]

Hi,

We're doing development on an AU1200 chip with the linux 2.6.11 kernel
provided by RAZA. We're running into troubles when trying to load the
AES encryption driver. This is the stack trace:

Break instruction in kernel code in arch/mips/kernel/traps.c::do_bp,
line 560[#1]:
Cpu 0
$ 0 : 00000000 1000fc00 00000001 1000fc01
$ 4 : 811e14e0 8eee01d4 00450014 804bd7f8
$ 8 : 811e14e0 00000001 8dcda280 0a0a0a0a
$12 : 81010100 7efefeff 666e6f63 66206769
$16 : 8dcda280 811e14e0 8eee01d4 00450014
$20 : 8dd36008 8eeb1b00 00000001 00000000
$24 : 00000000 2ac6fc54
$28 : 8f306000 8f307d38 8dd36008 80160f10
Hi : 00000042
Lo : 0017f836
epc : 801676e4 page_add_anon_rmap+0xd4/0xe0 Tainted: PF
ra : 80160f10 do_anonymous_page+0x410/0x438
Status: 1000fc03 KERNEL EXL IE
Cause : 00800024
PrId : 04030201
Modules linked in: mini_aes mae_driver au1550_ac97 soundcore
ac97_codec uinput usb_storage ohci_hcd ehci_hcd usbcore ide_disk
ide_generic dige_fss dige_drvr
Process su (pid: 1101, threadinfo=8f306000, task=8f7fb458)
Stack : 8dd36008 8eeb1b00 00000001 00000000 80160f10 80160c9c 00000000
00000004
803e8e8c 00000000 000005dc 003c29dc 000005dc 003c29dc 000005dc
003c29dc
000005dc 003c29dc 000005dc 003c29dc 8dcda280 8eeb1b00 8eee01d4
00000000
00450014 00000000 80160fb8 8f1f44c0 00000000 8014b300 8f307e90
8f307de0
00000001 00450014 00000000 8f1f450c 81275140 8f307e90 8f307de0
8014b300
...
Call Trace:
[<80160f10>] do_anonymous_page+0x410/0x438
[<80160c9c>] do_anonymous_page+0x19c/0x438
[<80160fb8>] do_no_page+0x80/0x678
[<8014b300>] file_read_actor+0x0/0x100
[<8014b300>] file_read_actor+0x0/0x100
[<801887d8>] do_lookup+0xb8/0xd4
[<801618a8>] handle_mm_fault+0x150/0x2d4
[<80175154>] do_sync_read+0x9c/0xe0
[<801633d0>] vma_merge+0x1a8/0x214
[<80110cd0>] do_page_fault+0x100/0x380
[<80163d34>] do_mmap_pgoff+0x76c/0x894
[<80117350>] fpu_emulator_cop1Handler+0x18c/0x1bc
[<8011727c>] fpu_emulator_cop1Handler+0xb8/0x1bc
[<80175288>] vfs_read+0xf0/0x158
[<8010e660>] do_cpu+0x364/0x3c4
[<80111828>] tlb_do_page_fault_1+0x100/0x108
[<80108688>] handle_cpu_int+0x20/0x38

Code: 0200000d 08059d8f 8ca40000 <0200000d> 08059d8c 00000000
27bdffe8 afbf0010 8c820010

It appears to me that there is a page fault being processed, but from
where, and how do I find the offending module?

replies to here and to my personal email would be appreciated. it is
nospam.tgreen at nospam.digecor.nospam.com. remove the nospam. and do
the appropriate substitution for the at.

thanks in advance,

Tom Green