Re: [PATCH 19/39] NLKD/x86-64 - stack-pointer-invalid markers

[Jan Beulich]

>>> Andi Kleen <ak@xxxxxxx> 10.11.05 14:23:55 >>>
>On Wednesday 09 November 2005 15:14, Jan Beulich wrote:
>> This adds static information about the code regions where the stack
>> pointer cannot be relied upon. Kernel debuggers may then use this
>> information to determine which stack to switch to when having a need
>> to switch off of namely the NMI stack.
>
>Hmm - can't this be expressed in CFI somehow? 

Probably one could use .cfi_undefined, but the code needing the information (switching away from the NMI stack) shouldn't have to go through parsing the .eh_frame section contents in order to obtain that information.

Jan

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