now-unused dtv slot, reset the slot to TLS_DTV_UNALLOCATED. * elf/tls-macros.h [__x86_64__] (TLS_GD): Fix the sequence with the proper set of no-op insn prefixes. * elf/tst-tls8.c (do_test): Use %zd format for l_tls_modid members.
* elf/Makefile: Add rules to build and run tst-tls8. * elf/tst-tls8.c: New file. * elf/tst-tlsmod4.c: New file.