On Wed, Dec 11, 2019 at 03:41:59PM +0000, Mark Brown wrote: > From: Dave Martin <Dave.Martin@xxxxxxx> > > An arch may want to tweak the mmap prot flags for an > ELFexecutable's initial mappings. For example, arm64 is going to > need to add PROT_BTI for executable pages in an ELF process whose > executable is marked as using Branch Target Identification (an > ARMv8.5-A control flow integrity feature). > > So that this can be done in a generic way, add a hook > arch_elf_adjust_prot() to modify the prot flags as desired: arches > can select CONFIG_HAVE_ELF_PROT and implement their own backend > where necessary. > > By default, leave the prot flags unchanged. > > Signed-off-by: Dave Martin <Dave.Martin@xxxxxxx> > Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> > Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>
