Aarch64 ELF files use mapping symbols with special names $x, $d to identify regions of Aarch64 code (see Aarch64 ELF ABI - "ARM IHI 0056B", section "4.5.4 Mapping symbols").
The patch filters out these symbols at load time, similar to "696b97a perf symbols: Ignore mapping symbols on ARM" changes done for ARM before V8. Signed-off-by: Victor Kamensky <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Avi Kivity <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Anton Blanchard <[email protected]> Cc: David Ahern <[email protected]> Cc: Will Deacon <[email protected]> Cc: Dave Martin <[email protected]> --- tools/perf/util/symbol-elf.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index 06fcd1b..1e188dd 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -862,6 +862,14 @@ int dso__load_sym(struct dso *dso, struct map *map, !strcmp(elf_name, "$t")) continue; } + /* Reject Aarch64 ELF "mapping symbols": these aren't unique and + * don't identify functions, so will confuse the profile + * output: */ + if (ehdr.e_machine == EM_AARCH64) { + if (!strcmp(elf_name, "$x") || + !strcmp(elf_name, "$d")) + continue; + } if (runtime_ss->opdsec && sym.st_shndx == runtime_ss->opdidx) { u32 offset = sym.st_value - syms_ss->opdshdr.sh_addr; -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
