linux-kernel - Re: [PATCH v2 17/31] perf dwarf-regs: Pass ELF flags to get_dwarf

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Message-ID: <Zy0UCxKmD3_mQmNh@google.com>
Date: Thu, 7 Nov 2024 11:24:59 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
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	linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-csky@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v2 17/31] perf dwarf-regs: Pass ELF flags to
 get_dwarf_regstr

On Mon, Oct 07, 2024 at 08:05:23AM -0700, Ian Rogers wrote:
> On Mon, Oct 7, 2024 at 1:09 AM Masami Hiramatsu <mhiramat@...nel.org> wrote:
> >
> > On Sat,  5 Oct 2024 12:55:27 -0700
> > Ian Rogers <irogers@...gle.com> wrote:
> >
> > > Pass a flags value as architectures like csky need the flags to
> > > determine the ABI variant.
> > >
> >
> > Same here. I need some examples of this chaneg.
> 
> The code here was already using the ELF machine, so dwarf-regs.c
> functions would already support cross building. There is the addition
> of ELF flags as on csky the registers change depending on the ABI
> version in the ELF flags.

I think it's used by the probe-finder only which won't support
cross-arch environment.  So probably no changes to users at this point.

Thanks,
Namhyung