Re: [PATCH 2/3] reliable stack trace support (x86-64)

From: Jan Beulich
Date: Tue May 16 2006 - 12:05:29 EST

>>> Andi Kleen <ak@xxxxxxx> 16.05.06 17:13 >>>
On Tuesday 16 May 2006 16:21, Jan Beulich wrote:
>> These are the x86_64-specific pieces to enable reliable stack traces. The
>> only restriction with this is that it currently cannot unwind across the
>> interrupt->normal stack boundary, as that transition is lacking proper
>> annotation.
>It would be nice if you could submit a patch to fix that.

But I don't know how to fix it. See my other mail - I have no experience with expressions, nor have I ever seen them in

>> +#define UNW_PC(frame) (frame)->
>> +#define UNW_SP(frame) (frame)->regs.rsp
>I think we alreay have instruction_pointer(). Better add a stack_pointer()
>in ptrace.h too.

I could do that, but the macros will have to remain, as they don't access pt_regs directly, so I guess it'd be
pointless to change it.

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