machine check in kernel for a mpc870 board
scottwood at freescale.com
Thu Jul 1 02:16:53 EST 2010
On 06/30/2010 01:14 AM, Shawn Jin wrote:
> Hi Scott,
>>> Bus Fault @ 0x00404c40, fixup 0x00000000
>>> Machine check in kernel mode.
>>> Caused by (from msr): regs 07d1cb80 Unknown values in msr
>>> NIP: 00404C40 XER: 00000000 LR: 00404C24 REGS: 07d1cb80 TRAP: 0200 DAR: 00000001
>>> MSR: 00001002 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 00
>> Can you look up the source line/instruction corresponding to 0x404c40, in
>> the wrapper ELF file?
> I'm not sure how to look up it.
Use a powerpc gdb on the wrapper ELF file, and do "li *0x404c40" and/or
"i li *0x404c40".
Or use a powerpc addr2line.
> But I used the BDI to dump the
> instructions in which you may find some clue? These should be kernel
> code, right? Maybe the gdb can help to de-assemble them?
Not easily (Format letter "i" is meaningless in "print" command, it
says...) and there'd be no context about what part of the source code it
> 00404c40 : 0xa00a0000 -1609957376 ....
But this is a 16-bit load from r10, which is from your previous register
dump is FF0009C0.
Does u-boot on your board put IMMR somewhere other than 0xff000000? If
so, you'll need to update the device tree to reflect this.
More information about the Linuxppc-dev