https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81708
--- Comment #11 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to H. Peter Anvin from comment #8) > How about simply letting the user enter an assembly expression of neither of > the standard ABI options are suitable? Also, shouldn't the user space > default on 64 bits be an offset into the TLS using %fs, or is there > something magic about how the kernel is compiled that changes it to %gs:? -mcmodel=kernel switches TLS reg to %gs. You can use mstack-protector-guard-reg=%gs with other code models.
