On Wed, Sep 07, 2016 at 11:43:27AM +0100, Julien Grall wrote:
>
>
> On 07/09/2016 04:33, Konrad Rzeszutek Wilk wrote:
> > > ...snip..
> > > > > +case R_AARCH64_ABS32:
> > > > > +ovf = reloc_data(RELOC_OP_ABS, dest, val, 32);
> > > > > +break;
> > > >
> > > > I hav
On 07/09/2016 04:33, Konrad Rzeszutek Wilk wrote:
...snip..
+case R_AARCH64_ABS32:
+ovf = reloc_data(RELOC_OP_ABS, dest, val, 32);
+break;
I have noticed that not all the relocations are implemented (e.g
R_AARCH64_ABS16, R_AARCH64_MOVW_*...). I don't think the
Hi Konrad,
On 07/09/2016 01:31, Konrad Rzeszutek Wilk wrote:
+void arch_livepatch_apply_jmp(struct livepatch_func *func)
+{
+uint32_t insn;
+uint32_t *old_ptr;
+uint32_t *new_ptr;
+
+BUILD_BUG_ON(PATCH_INSN_SIZE > sizeof(func->opaque));
+BUILD_BUG_ON(PATCH_INSN_SIZE != sizeof
> ...snip..
> > > +case R_AARCH64_ABS32:
> > > +ovf = reloc_data(RELOC_OP_ABS, dest, val, 32);
> > > +break;
> >
> > I have noticed that not all the relocations are implemented (e.g
> > R_AARCH64_ABS16, R_AARCH64_MOVW_*...). I don't think there is anything
> > preve
On Thu, Aug 25, 2016 at 09:02:48AM -0600, Jan Beulich wrote:
> >>> On 25.08.16 at 15:37, wrote:
> > --- a/xen/include/xen/types.h
> > +++ b/xen/include/xen/types.h
> > @@ -14,6 +14,12 @@
> > #define NULL ((void*)0)
> > #endif
> >
> > +#define U16_MAX ((u16)~0U)
> > +#define S16_MAX
> > +void arch_livepatch_apply_jmp(struct livepatch_func *func)
> > +{
> > +uint32_t insn;
> > +uint32_t *old_ptr;
> > +uint32_t *new_ptr;
> > +
> > +BUILD_BUG_ON(PATCH_INSN_SIZE > sizeof(func->opaque));
> > +BUILD_BUG_ON(PATCH_INSN_SIZE != sizeof(insn));
> > +
> > +ASSERT(v
Hi Konrad,
On 25/08/16 14:37, Konrad Rzeszutek Wilk wrote:
As compared to x86 the va of the hypervisor .text
is locked down - we cannot modify the running pagetables
to have the .ro flag unset. We borrow the same idea that
alternative patching has - which is to vmap the entire
.text region and u
>>> On 25.08.16 at 15:37, wrote:
> --- a/xen/include/xen/types.h
> +++ b/xen/include/xen/types.h
> @@ -14,6 +14,12 @@
> #define NULL ((void*)0)
> #endif
>
> +#define U16_MAX ((u16)~0U)
> +#define S16_MAX ((s16)(U16_MAX>>1))
> +#define S16_MIN ((s16)(-S16_MAX - 1))
> +#d
As compared to x86 the va of the hypervisor .text
is locked down - we cannot modify the running pagetables
to have the .ro flag unset. We borrow the same idea that
alternative patching has - which is to vmap the entire
.text region and use the alternative virtual address
for patching.
Since we are
