Using apcs frame layout

[Anton Kozlov]

Sorry, not quite undestand you, what can we do? Add apcs layout option?

Thanks,
Anton

On Tue, 2016-03-29 at 15:11 +0100, Andrew Haley wrote:
> On 03/29/2016 12:13 PM, Anton Kozlov wrote:
> > Actually, x86_64 just standartize optionallity of rbp use as stack
> > frame link: http://www.x86-64.org/documentation/abi.pdf Section
> > 3.2.2
> > The Stack Frame, note 7.
> 
> Indeed.  It's always been optional.
> 
> > So on x86_64 rbp may or may not point to previouslly saved rbp
> > address.
> > In last case perf fp-mode will not work. But in fp-mode unwinding
> > is
> > based solely on memory values (linux
> > -sources/arch/x86/kernel/cpu/perf_event.c:perf_callchain_user; x86
> > directory contains unified sources for x86 and x86_64)
> 
> Mmm.  So in legacy ARM 32 mode, we can perhaps do that.
> 
> Andrew.
> 
>