On Tue, 12 Jul 2016 18:38:47 -0400 Kees Cook <keesc...@chromium.org> wrote:
> On Tue, Jul 12, 2016 at 6:08 PM, Russell King - ARM Linux > <li...@armlinux.org.uk> wrote: > > On Tue, Jul 12, 2016 at 03:45:56PM -0400, Kees Cook wrote: > >> On Mon, Jul 4, 2016 at 7:40 PM, Emese Revfy <re.em...@gmail.com> wrote: > > That sounds like a problem for architectures that still discard the > > __exit section at link time to reduce the size of the linked kernel > > image - though, obviously, if using the plugin results in a smaller > > kernel image _with_ the exit sections, then there's a net benefit > > size-wise. > > Ah right, __exit is dropped for non-modular builds. So, for "both > __init and __exit" it sounds like the behavior depends on the build: > > - if modular: remove __init marking (since we need it after init) > - if non-modular: remove __exit marking (since we'll never call exit) When gcc compiles vmlinux these functions should be in __init and when it compiles *.ko then they can be in __exit. I have no time to do this now but I added it to my todo list. The temporary fix can be that I enable this section move only on x86 (on other archs it will decrase the coverage). -- Emese
