From baf2a265c71113a91f6971313ef191be9e77ef6a Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Tue, 7 Jun 2022 11:11:03 -0300 Subject: misc: Optimize internal usage of __libc_single_threaded By adding an internal alias to avoid the GOT indirection. On some architecture, __libc_single_thread may be accessed through copy relocations and thus it requires to update also the copies default copy. This is done by adding a new internal macro, libc_hidden_data_{proto,def}, which has an addition argument that specifies the alias name (instead of default __GI_ one). Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Fangrui Song --- misc/single_threaded.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'misc') diff --git a/misc/single_threaded.c b/misc/single_threaded.c index 96ada91..9b0746a 100644 --- a/misc/single_threaded.c +++ b/misc/single_threaded.c @@ -25,3 +25,5 @@ char __libc_single_threaded; #else char __libc_single_threaded = 1; #endif +libc_hidden_data_def_alias (__libc_single_threaded, + __libc_single_threaded_internal) -- cgit v1.1