Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 06/21] perf symbols: Ignore mapping symbols on aarch64 | Date | Wed, 11 Feb 2015 18:09:00 -0300 |
| |
From: Victor Kamensky <victor.kamensky@linaro.org>
Aarch64 ELF files use mapping symbols with special names $x, $d to identify regions of Aarch64 code (see Aarch64 ELF ABI - "ARM IHI 0056B", section "4.5.4 Mapping symbols").
The patch filters out these symbols at load time, similar to "696b97a perf symbols: Ignore mapping symbols on ARM" changes done for ARM before V8.
Also added handling of mapping symbols that has format "$d.<any>" and similar for both cases.
Note we are not making difference between EM_ARM and EM_AARCH64 mapping symbols instead code handles superset of both.
Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Anton Blanchard <anton@samba.org> Cc: Avi Kivity <avi@cloudius-systems.com> Cc: Dave Martin <Dave.Martin@arm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Russell King <linux@arm.linux.org.uk> Link: http://lkml.kernel.org/r/1422340442-4673-2-git-send-email-victor.kamensky@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/symbol-elf.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index b24f9d8727a8..225eb73ee78b 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -859,10 +859,9 @@ int dso__load_sym(struct dso *dso, struct map *map, /* Reject ARM ELF "mapping symbols": these aren't unique and * don't identify functions, so will confuse the profile * output: */ - if (ehdr.e_machine == EM_ARM) { - if (!strcmp(elf_name, "$a") || - !strcmp(elf_name, "$d") || - !strcmp(elf_name, "$t")) + if (ehdr.e_machine == EM_ARM || ehdr.e_machine == EM_AARCH64) { + if (elf_name[0] == '$' && strchr("adtx", elf_name[1]) + && (elf_name[2] == '\0' || elf_name[2] == '.')) continue; } -- 1.9.3
| |