[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH v2 2/2] xen/riscv: add explicit check that .got{.plt} is empty
On Thu, Mar 16, 2023 at 11:22 PM Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx> wrote: > > The GOT sections usage should be avoided in the hypervisor > so to catch such use cases earlier when GOT things are > produced the patch introduces .got and .got.plt sections > and adds asserts that they're empty. > > The sections won't be created until they remain > empty otherwise the asserts would cause early failure. > > Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx> Acked-by: Alistair Francis <alistair.francis@xxxxxxx> Alistair > --- > Changes in V2: > * the patch was introduced in patch series v2. > --- > xen/arch/riscv/xen.lds.S | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/xen/arch/riscv/xen.lds.S b/xen/arch/riscv/xen.lds.S > index ca57cce75c..f299ea8422 100644 > --- a/xen/arch/riscv/xen.lds.S > +++ b/xen/arch/riscv/xen.lds.S > @@ -1,3 +1,4 @@ > +#include <xen/lib.h> > #include <xen/xen.lds.h> > > #undef ENTRY > @@ -123,6 +124,15 @@ SECTIONS > *(SORT(.init_array.*)) > __ctors_end = .; > } :text > + > + .got : { > + *(.got) > + } : text > + > + .got.plt : { > + *(.got.plt) > + } : text > + > . = ALIGN(POINTER_ALIGN); > __init_end = .; > > @@ -156,3 +166,6 @@ SECTIONS > > ELF_DETAILS_SECTIONS > } > + > +ASSERT(!SIZEOF(.got), ".got non-empty") > +ASSERT(!SIZEOF(.got.plt), ".got.plt non-empty") > -- > 2.39.2 > >
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