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

[Pete/Piet Delaney]

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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

> 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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