On Tue, Aug 15, 2017 at 07:20:38AM -0700, Thomas Garnier wrote: > On Tue, Aug 15, 2017 at 12:56 AM, Ingo Molnar <mi...@kernel.org> wrote:
> > Have you considered a kernel with -mcmodel=small (or medium) instead of > > -fpie > > -mcmodel=large? We can pick a random 2GB window in the (non-kernel) > > canonical > > x86-64 address space to randomize the location of kernel text. The location > > of > > modules can be further randomized within that 2GB window. > > -model=small/medium assume you are on the low 32-bit. It generates > instructions where the virtual addresses have the high 32-bit to be > zero. That's a compiler fail, right? Because the SDM states that for "CALL rel32" the 32bit displacement is sign extended on x86_64. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
