Re: kernel crash - howto debug

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What filesystem are you using??

In case it is busybox check the file etc/inittab

In that file you have a line like this:

# Start an "askfirst" shell on the serial port
ttyS3::askfirst:-/bin/sh

Check if it says ttyS0.

Regards,
Aldo Brett

On Fri, Jun 11, 2010 at 9:00 AM, makkalot <makkalot@xxxxxxxxx> wrote:
> On Friday, June 11, 2010 04:54:15 pm rohit vashist wrote:
>> Hi,
>>
>> Are you sure that your TFTP and NFS client have been configured.Are you
>> getting these following messages when you boot your board :-
>>
>
> Yes i get these messages :
>
> RD-DX107-48F4G-C>> run kerneltftp_flash
> SK98#0: network connection up using port A
>    speed:           100
>    autonegotiation: yes
>    duplex mode:     full
>    flowctrl:        local send
>    irq moderation:  disabled
> Using SK98#0 device
> TFTP from server 160.75.x.x; our IP address is 160.75.x.x
> Filename 'uImage'.
> Load address: 0x400000
> Loading: *\0x08T
> #################################################################
> \0x09 #################################################################
> \0x09 #################################################################
> \0x09 #################################################################
> \0x09 #################################################################
> \0x09 ##############################
> done
> Bytes transferred = 1816036 (1bb5e4 hex)
> ## Booting image at 00400000 ...
>   Image Name:   Linux-2.6.12-arm1
>   Image Type:   ARM Linux Kernel Image (uncompressed)
>   Data Size:    1815972 Bytes =  1.7 MB
>   Load Address: 00008000
>   Entry Point:  00008000
>   Verifying Checksum ... OK
> OK
>
>
>> Bytes transferred = 1421464 (15b098
>> hex)
>>
>> ## Booting image at 82000000
>> ...
>>
>>    Image Name:   Linux-2.6.12
>>
>>
>>    Image Type:   ARM Linux Kernel Image
>> (uncompressed)
>>
>>    Data Size:    1421400 Bytes
>> =1.4MB
>>
>>    Load Address:
>> 80008000
>>
>>    Entry Point:
>> 80008000
>>
>>    Verifying Checksum ... OK
>>
>> This will confirm that your uimage has been loaded properly.Can you confirm
>> this?
>>
>> On Thu, Jun 10, 2010 at 7:39 PM, makkalot <makkalot@xxxxxxxxx> wrote:
>> > On Thursday, June 10, 2010 05:20:32 pm Vaughn Clinton wrote:
>> > > what's the kernel cmdline look like .. that would be helpful ...
>> >
>> > Hi ,
>> >
>> > bootargs=console=ttyS0,115200 init=/linuxrc root=/dev/mtdblock0
>> > rootfstype=jffs2 ip=160.75.x.x:160.75.x.x$(bootargs_end);
>> > bootargs_end=:::DB88FXX81:egiga0:none
>> >
>> > > > From: makkalot@xxxxxxxxx
>> > > > To: kernelnewbies@xxxxxxxxxxxx
>> > > > Subject: kernel crash - howto debug
>> > > > Date: Thu, 10 Jun 2010 16:53:26 +0300
>> > > >
>> > > > Hi,
>> > > >
>> > > > i'm triyng to power up an ARM based embedded board. I applied the
>> >
>> > patches
>> >
>> > > > manifacturer supplied to me (to kernel), cross compiled the kernel
>> > > > with toolchain that they gave. And when i boot the machine i get
>> > > > just :
>> > > >
>> > > > Starting kernel ...
>> > > >
>> > > > Uncompressing
>> >
>> > Linux....................................................................
>> >
>> > > > .................................................... done, booting
>> > > > the kernel.
>> > > >
>> > > > And kernel freezes, no other message is displayed after that. I'm
>> > > > using kernel 2.6.12, any ideas how can i see what is going on? Is
>> > > > there a way to get some debugging info to see what the problem is?
>> > > > Thanks in
>> >
>> > advance
>> >
>> > > > ....
>> > > >
>> > > > --
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>> >
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