On Fri, Dec 06, 2019 at 02:13:45PM -0800, Sami Tolvanen wrote: > Reserve the x18 register from general allocation when SCS is enabled, > because the compiler uses the register to store the current task's > shadow stack pointer. Note that all external kernel modules must also be > compiled with -ffixed-x18 if the kernel has SCS enabled. > > Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx> > Reviewed-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> > Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> > --- > arch/arm64/Makefile | 4 ++++ > 1 file changed, 4 insertions(+) Acked-by: Will Deacon <will@xxxxxxxxxx> Will
