https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98110
--- Comment #8 from Florian Weimer <fw at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #6) > on the mov %fs:0x10,%rax perhaps %fs isn't initialized yet? Yes, that's why the access is guarded by flags & DL_LOOKUP_GSCOPE_LOCK. During initial relocation, _dl_lookup_symbol_x is called without this flag.