Messages in this thread | | | Date | Thu, 10 Nov 2005 15:25:50 +0100 | From | "Jan Beulich" <> | Subject | Re: [PATCH 19/39] NLKD/x86-64 - stack-pointer-invalid markers |
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>>> Andi Kleen <ak@suse.de> 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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