Re: Need help for kernel crash dump analysis

[Xavier Galleri]

Hi everybody,

My little problem does not seem to make anybody enthousiastic, at which point that I am wondering if there is any GDB user on kernel dump listening over there ... Maybe I am on the wrong mailing list ? Or should I look for further help somewhere else ? Or is it that my explanations were not clear enough ?

I have found that issuing an 'info frame @ebp @eip' command could provide the beginning of a stack dump analysis. Now, I am trying to find out where is stored the stack frame of the current process when an interrupt occurs. Is there anybody who knows this ?

Regards

Xavier Galleri wrote:

[EMAIL PROTECTED]">Thank you for your answer,

It's difficult to believe that nothing more intuitive and immediate can be done to get the kernel stack of any process from a GDB session on a kernel crash dump. Does it mean that this is something that nobody ever need until now ?

Also, is there a mean to ask GDB to dump the kernel stack of the 'curproc' that has been interrupted at the time of kernel panic ?

Regards,

Xavier

diman wrote:

[EMAIL PROTECTED]">

On Fri, 12 Jan 2001, Xavier Galleri wrote:

OK, let's make it a bit clearer !

....
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Now, if you've read my first mail, I was actually asking for help onhow 
to dump the stack of an interrupted process with GDB when the 
kernelcrash occurs in the context of an isr. Actually, I would like to 
know how I could dump the stack of *any* process at the time of the 
crash. This way, I would be able to see where my user-land daemon was 
lying in the kernel when the interrupt occurs.

To dump stack of *any* (all) process you may write a little kld wich will:1) go through a process list,2) get tf_eip, tf_esp, tf_ebp of a process3) get p->p_vmspace 4) read process stack frames and all you need by manually   written routine based on procfs_rwmem and old good 'pread'   (which dosn't work now)Another way is to go through proc list and coredump all theprocesses for future manual analisys.I like such way. Can anybody point me to some difficults wich can appear whileimplementing this?
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