linux-kernel - Re: [PATCH] perf symbol: Add LoongArch case in get_plt

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Date:   Tue, 23 May 2023 15:30:07 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Huacai Chen <chenhuacai@...nel.org>
Cc:     Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org, loongarch@...ts.linux.dev,
        linux-kernel@...r.kernel.org, loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH] perf symbol: Add LoongArch case in get_plt_sizes()

On Tue, May 23, 2023 at 09:47:19AM +0800, Huacai Chen wrote:

[...]

> > > I'm very sorry that this patch breaks cross-build. We need some
> > > additional modification.
> > >
> > > diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
> > > index 5d409c26a22e..b3dbf6ca99a7 100644
> > > --- a/tools/perf/util/symbol-elf.c
> > > +++ b/tools/perf/util/symbol-elf.c
> > > @@ -35,6 +35,10 @@
> > >  #define EM_AARCH64     183  /* ARM 64 bit */
> > >  #endif
> > >
> > > +#ifndef EM_LOONGARCH
> > > +#define EM_LOONGARCH   258
> > > +#endif
> > > +

I confirmed that we must apply this change, otherwise, it will
introduce perf building failure on Ubuntu 22.04 (jammy) with my Arm64
machine.

Sorry I didn't detect the building failure when reviewed this patch!

Thanks,
Leo