From: Adrian Hunter Date: Tue, 31 Jan 2023 13:16:20 +0000 (+0200) Subject: perf symbols: Record whether a symbol is an alias for an IFUNC symbol X-Git-Tag: v6.3-rc1~125^2~60 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=05963491c094ca3de397ef0cfe5537b666ae4412;p=thirdparty%2Flinux.git perf symbols: Record whether a symbol is an alias for an IFUNC symbol To assist with synthesizing plt symbols for IFUNCs, record whether a symbol is an alias of an IFUNC symbol. Reviewed-by: Namhyung Kim Signed-off-by: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Link: https://lore.kernel.org/r/20230131131625.6964-5-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index a024f06f75d87..d05727fcb30d2 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -201,10 +201,14 @@ again: continue; if (choose_best_symbol(curr, next) == SYMBOL_A) { + if (next->type == STT_GNU_IFUNC) + curr->ifunc_alias = true; rb_erase_cached(&next->rb_node, symbols); symbol__delete(next); goto again; } else { + if (curr->type == STT_GNU_IFUNC) + next->ifunc_alias = true; nd = rb_next(&curr->rb_node); rb_erase_cached(&curr->rb_node, symbols); symbol__delete(curr); diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index 2fdeb22bd02f7..7558735543c25 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -64,6 +64,8 @@ struct symbol { u8 inlined:1; /** Has symbol__annotate2 been performed. */ u8 annotate2:1; + /** Symbol is an alias of an STT_GNU_IFUNC */ + u8 ifunc_alias:1; /** Architecture specific. Unused except on PPC where it holds st_other. */ u8 arch_sym; /** The name of length namelen associated with the symbol. */