Hi Kees, On Thu, Sep 26, 2019 at 10:55:51AM -0700, Kees Cook wrote: > The EXCEPTION_TABLE is read-only, so collapse it into RO_DATA. > > Signed-off-by: Kees Cook <keesc...@chromium.org> > --- > arch/arm64/kernel/vmlinux.lds.S | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S > index 81d94e371c95..c6ba2eee0ee8 100644 > --- a/arch/arm64/kernel/vmlinux.lds.S > +++ b/arch/arm64/kernel/vmlinux.lds.S > @@ -5,6 +5,8 @@ > * Written by Martin Mares <m...@atrey.karlin.mff.cuni.cz> > */ > > +#define RO_DATA_EXCEPTION_TABLE_ALIGN 8 > + > #include <asm-generic/vmlinux.lds.h> > #include <asm/cache.h> > #include <asm/kernel-pgtable.h> > @@ -135,8 +137,8 @@ SECTIONS > . = ALIGN(SEGMENT_ALIGN); > _etext = .; /* End of text section */ > > - RO_DATA(PAGE_SIZE) /* everything from this point to */ > - EXCEPTION_TABLE(8) /* __init_begin will be marked RO NX */ > + /* everything from this point to __init_begin will be marked RO NX */ > + RO_DATA(PAGE_SIZE) > > . = ALIGN(PAGE_SIZE);
Do you reckon it would be worth merging this last ALIGN directive into the RO_DATA definition too? Given that we want to map the thing read-only, it really has to be aligned either side. Anyway, that's only a nit, so: Acked-by: Will Deacon <w...@kernel.org> Will P.S. Please CC the arm64 maintainers on arm64 patches -- I nearly missed this one!
