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 --- sysdeps/nptl/setxid.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sysdeps') diff --git a/sysdeps/nptl/setxid.h b/sysdeps/nptl/setxid.h index b821d6bc07..b87cad7b18 100644 --- a/sysdeps/nptl/setxid.h +++ b/sysdeps/nptl/setxid.h @@ -29,7 +29,7 @@ #define INLINE_SETXID_SYSCALL(name, nr, args...) \ ({ \ int __result; \ - if (!__libc_single_threaded) \ + if (!__libc_single_threaded_internal) \ { \ struct xid_command __cmd; \ __cmd.syscall_no = __NR_##name; \ -- cgit 1.4.1