On Fri, Sep 22, 2017 at 11:38 AM, H. Peter Anvin <h...@zytor.com> wrote: > We lose EBX on 32 bits, but we don't lose RBX on 64 bits - since x86-64 > has RIP-relative addressing there is no need for a dedicated PIC register.
FWIW, since gcc 5, the PIC register isn't totally lost. It is now reusable, and that seems to have improved performance: https://gcc.gnu.org/gcc-5/changes.html -Kees -- Kees Cook Pixel Security _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
