linux-kernel - [PATCH V2 0/9] perf symbols: Improve dso__synthesize_plt

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Message-Id: <20230131131625.6964-1-adrian.hunter@intel.com>
Date:   Tue, 31 Jan 2023 15:16:16 +0200
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org
Subject: [PATCH V2 0/9] perf symbols: Improve dso__synthesize_plt_symbols() for x86

Hi

This is version 2 of the second of 2 patchsets to improve
dso__synthesize_plt_symbols().
This patchset focuses on getting rid of unknown symbols that show up in
Intel PT traces.

x86 has 2 more plt's, namely .plt.sec and .plt.got, so support is added for
synthesizing symbols for them.  Special handing is needed for IFUNC symbols,
and it is also possible to have a .plt for static executables, so support is
added for that.


Changes in V2:

    perf symbols: Add support for x86 .plt.sec
        Amend commit message and example about -z plt

    perf symbols: Get symbols for .plt.got for x86-64
        Fix get_plt_got_name() not to segfault with EM_386


Adrian Hunter (9):
      perf symbols: Correct plt entry sizes for x86
      perf symbols: Add support for x86 .plt.sec
      perf symbols: Sort plt relocations for x86
      perf symbols: Record whether a symbol is an alias for an IFUNC symbol
      perf symbols: Add support for IFUNC symbols for x86_64
      perf symbols: Allow for .plt without header
      perf symbols: Allow for static executables with .plt
      perf symbols: Start adding support for .plt.got for x86
      perf symbols: Get symbols for .plt.got for x86-64

 tools/perf/util/symbol-elf.c | 365 ++++++++++++++++++++++++++++++++++++++++---
 tools/perf/util/symbol.c     |   4 +
 tools/perf/util/symbol.h     |   2 +
 tools/perf/util/symsrc.h     |   1 +
 4 files changed, 350 insertions(+), 22 deletions(-)


Regards
Adrian