[PATCHv4 3/6] powerpc64: Add .opd based function descriptor dereference

[Sergey Senozhatsky]

On (11/13/17 12:41), Santosh Sivaraj wrote:
> * Sergey Senozhatsky <sergey.senozhatsky at gmail.com> wrote (on 2017-11-10 08:48:27 +0900):
> 
> > We are moving towards separate kernel and module function descriptor
> > dereference callbacks. This patch enables it for powerpc64.
> > 
> > For pointers that belong to the kernel
> > -  Added __start_opd and __end_opd pointers, to track the kernel
> >    .opd section address range;
> > 
> > -  Added dereference_kernel_function_descriptor(). Now we
> >    will dereference only function pointers that are within
> >    [__start_opd, __end_opd);
> > 
> > For pointers that belong to a module
> > -  Added dereference_module_function_descriptor() to handle module
> >    function descriptor dereference. Now we will dereference only
> >    pointers that are within [module->opd.start, module->opd.end).
> > 
> > Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky at gmail.com>
> > ---
> >  arch/powerpc/include/asm/module.h   |  3 +++
> >  arch/powerpc/include/asm/sections.h | 12 ++++++++++++
> >  arch/powerpc/kernel/module_64.c     | 14 ++++++++++++++
> >  arch/powerpc/kernel/vmlinux.lds.S   |  2 ++
> >  4 files changed, 31 insertions(+)
> >
> 
> Looks good on powerpc. If you wish:
> 
> Tested-by: Santosh Sivaraj <santosh at fossix.org> # for powerpc

thanks!

	-ss