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    Subject[PATCH 08/16] perf, tool: Add '.note' check into search for NOTE section
    Date
    Adding '.note' section name to be check when looking for notes
    section. The '.note' name is used by kernel VDSO.

    Signed-off-by: Jiri Olsa <jolsa@redhat.com>
    ---
    tools/perf/util/symbol.c | 29 +++++++++++++++++++++++------
    1 files changed, 23 insertions(+), 6 deletions(-)

    diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
    index 1e42034..9c0fa32 100644
    --- a/tools/perf/util/symbol.c
    +++ b/tools/perf/util/symbol.c
    @@ -1474,14 +1474,31 @@ static int elf_read_build_id(Elf *elf, void *bf, size_t size)
    goto out;
    }

    - sec = elf_section_by_name(elf, &ehdr, &shdr,
    - ".note.gnu.build-id", NULL);
    - if (sec == NULL) {
    + /*
    + * Check following sections for notes:
    + * '.note.gnu.build-id'
    + * '.notes'
    + * '.note' (VDSO specific)
    + */
    + do {
    + sec = elf_section_by_name(elf, &ehdr, &shdr,
    + ".note.gnu.build-id", NULL);
    + if (sec)
    + break;
    +
    sec = elf_section_by_name(elf, &ehdr, &shdr,
    ".notes", NULL);
    - if (sec == NULL)
    - goto out;
    - }
    + if (sec)
    + break;
    +
    + sec = elf_section_by_name(elf, &ehdr, &shdr,
    + ".note", NULL);
    + if (sec)
    + break;
    +
    + return err;
    +
    + } while (0);

    data = elf_getdata(sec, NULL);
    if (data == NULL)
    --
    1.7.7.6


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