Messages in this thread Patch in this message | | | From | Adrian Hunter <> | Subject | [PATCH V2 4/9] perf symbols: Record whether a symbol is an alias for an IFUNC symbol | Date | Tue, 31 Jan 2023 15:16:20 +0200 |
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To assist with synthesizing plt symbols for IFUNCs, record whether a symbol is an alias of an IFUNC symbol.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> --- tools/perf/util/symbol.c | 4 ++++ tools/perf/util/symbol.h | 2 ++ 2 files changed, 6 insertions(+)
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index a024f06f75d8..d05727fcb30d 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -201,10 +201,14 @@ void symbols__fixup_duplicate(struct rb_root_cached *symbols) 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 2fdeb22bd02f..7558735543c2 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. */ -- 2.34.1
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