On Tue, Dec 24, 2019 at 08:15:11PM +0800, Andy Lutomirski wrote:
> Does power have PC-relative data access? If so, I wonder if the code can be
> arranged so that even the array accesses don’t require computing an absolute
> address at any point.
Not before ISA 3.0 (that is Power9).
The bcl/mfl
On Tue, Dec 24, 2019 at 4:15 AM Andy Lutomirski wrote:
>
>
>
> > On Dec 24, 2019, at 7:53 PM, christophe leroy
> > wrote:
> >
> >
> >
> >> Le 24/12/2019 à 03:27, Andy Lutomirski a écrit :
> >>> On Mon, Dec 23, 2019 at 6:31 AM Christophe Leroy
> >>> wrote:
> >>>
> >>> On powerpc, __arch_get_vd
> On Dec 24, 2019, at 7:53 PM, christophe leroy wrote:
>
>
>
>> Le 24/12/2019 à 03:27, Andy Lutomirski a écrit :
>>> On Mon, Dec 23, 2019 at 6:31 AM Christophe Leroy
>>> wrote:
>>>
>>> On powerpc, __arch_get_vdso_data() clobbers the link register,
>>> requiring the caller to set a stack f
Le 24/12/2019 à 03:27, Andy Lutomirski a écrit :
On Mon, Dec 23, 2019 at 6:31 AM Christophe Leroy
wrote:
On powerpc, __arch_get_vdso_data() clobbers the link register,
requiring the caller to set a stack frame in order to save it.
As the parent function already has to set a stack frame and
On Mon, Dec 23, 2019 at 6:31 AM Christophe Leroy
wrote:
>
> On powerpc, __arch_get_vdso_data() clobbers the link register,
> requiring the caller to set a stack frame in order to save it.
>
> As the parent function already has to set a stack frame and save
> the link register to call the C vdso fu
On powerpc, __arch_get_vdso_data() clobbers the link register,
requiring the caller to set a stack frame in order to save it.
As the parent function already has to set a stack frame and save
the link register to call the C vdso function, retriving the
vdso data pointer there is lighter.
Give arch
