[Crash-utility] Re: [Kgdb-bugreport] Problem getting kgdb to read kernel symbols. addresses shifted?

[Dave Anderson]

> Pete/Piet Delaney wrote:
> 
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>> Derek Atkins wrote:
>>
>> Dave, I thought you would likely know what's going on here.
>> How about helping out Derek? Sounds like a RedHat'ism and
>> I kinda recall your mentioning it and apologizing for it
>> as an unfortunate RedHat directive.
>>
>> - -piet


  http://people.redhat.com/anderson/crash.changelog.html#4_0_4_5


>>
>>> ebiederm at xmission.com (Eric W. Biederman) writes:
>>>
>>>
>>>> Derek Atkins <warlord at MIT.EDU> writes:
>>>>
>>>>
>>>>> Well, gdb agrees with System.map, so I'm sure that gdb itself is
>>>>> okay.  It's certainly possible that that the kgdb stub is weird,
>>>>> but /proc/kallsyms doesn't match System.map, and THAT'S what's
>>>>> confusing me most of all.
>>>>
>>>>
>>>> Ok.  So we must have a relocatable kernel that figures it has been
>>>> relocated.  Interesting. 
>>>> What is your bootloader?
>>>
>>>
>>> GRUB
>>>
>>>
>>>> What is your kernel version?
>>>
>>>
>>> 2.6.22.5-76_kgdb0.fc7-i686
>>>
>>>
>>>> What is your kernel config?
>>>
>>>
>>> See the attached .config file.
>>>
>>>
>>>> The only time I would expect to see what you are seeing is if
>>>> you are debugging the kdump kernel, which doesn't sound like
>>>> the case.
>>>
>>>
>>> Nope.  I started with the Fedora 'i686' config and then patched
>>> in the kgdb patches and configuration.
>>>
>>>
>>>> If we actually have a truly offset kernel then while things
>>>> may not be perfect this is at least expected.  I don't think
>>>> I have heard of anyone handling this case very well.
>>>
>>>
>>> :(   Like I said before, it SEEMS to work okay by telling GDB
>>> to load in at a different address.
>>>
>>>
>>>>> Which was how long ago?  ;)
>>>>
>>>>
>>>> Long enough ago that I don't remember when ;)
>>>
>>>
>>> Heh.
>>>
>>>
>>>> Eric
>>>
>>>
>>> -derek
>>>
>>>
>>>
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>>
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