From cb75d02d8b8a773386ef3867457d600752a9ec4b Mon Sep 17 00:00:00 2001 From: hubin Date: Sun, 9 Oct 2022 10:34:52 +0800 Subject: [PATCH 36/37] lookup: skip finding local symbols for object with no local symbols Signed-off-by: hubin --- kpatch-build/lookup.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/kpatch-build/lookup.c b/kpatch-build/lookup.c index d3b6ae9..4b1717a 100644 --- a/kpatch-build/lookup.c +++ b/kpatch-build/lookup.c @@ -166,6 +166,22 @@ static bool locals_match(struct lookup_table *table, int idx, return true; } +static int count_local_symbol(struct list_head *sym_list) +{ + struct symbol *sym; + int sym_num = 0; + + list_for_each_entry(sym, sym_list, list) { + if (sym->bind != STB_LOCAL) + continue; + if (sym->type != STT_FUNC && sym->type != STT_OBJECT) + continue; + sym_num++; + } + + return sym_num; +} + static void find_local_syms(struct lookup_table *table, struct symbol *file_sym, struct list_head *sym_list) { @@ -173,6 +189,9 @@ static void find_local_syms(struct lookup_table *table, struct symbol *file_sym, struct object_symbol *lookup_table_file_sym = NULL; int i; + if (count_local_symbol(sym_list) == 0) + return; + for_each_obj_symbol(i, sym, table) { if (sym->type != STT_FILE) continue; -- 2.33.0