linux-kernel - [PATCH v3 0/2] perf symbol: Minor fixing

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Date:   Sun, 24 Jul 2022 14:00:11 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>,
        Fangrui Song <maskray@...gle.com>,
        Chang Rui <changruinj@...il.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v3 0/2] perf symbol: Minor fixing

This patch set contains two minor fixing for parsing symbols.

The first patch changes to use program header for parsing symbols of
user space executable and shared objects.  Since kernel's symbol parsing
is more complex than userspace for support both kernel symbols and module
symbols, this is why this patch set uses conservative way and doesn't
change kernel symbols parsing.

The second patch is to detect symbols from sections without setting
attribute flag SHF_ALLOC, these symbols are used for linker warning,
skip to record them to avoid spurious symbols.

Changes from v2:
- Changed to use more gernal way to check the attribute bit SHF_ALLOC
  for sections rather than check the section string name (Fangrui).

Changes from v1:
- Changed to use program header / PT_LOAD segments to parse symbols for
  userspace executable and shared object files (Fangrui).

Leo Yan (2):
  perf symbol: Correct address for bss symbols
  perf symbol: Skip symbols if SHF_ALLOC flag is not set

 tools/perf/util/symbol-elf.c | 56 +++++++++++++++++++++++++++++++++---
 1 file changed, 52 insertions(+), 4 deletions(-)

-- 
2.25.1