Re: [PATCH v2 1/3] vmlinux.lds.h: Add .gnu.version* to DISCARDS

[Kees Cook]

On Mon, Jun 22, 2020 at 03:00:43PM -0700, Fangrui Song wrote:
> On 2020-06-22, Kees Cook wrote:
> > For vmlinux linking, no architecture uses the .gnu.version* section,
> > so remove it via the common DISCARDS macro in preparation for adding
> > --orphan-handling=warn more widely.
> > 
> > Signed-off-by: Kees Cook <keesc...@chromium.org>
> > ---
> > include/asm-generic/vmlinux.lds.h | 1 +
> > 1 file changed, 1 insertion(+)
> > 
> > diff --git a/include/asm-generic/vmlinux.lds.h 
> > b/include/asm-generic/vmlinux.lds.h
> > index db600ef218d7..6fbe9ed10cdb 100644
> > --- a/include/asm-generic/vmlinux.lds.h
> > +++ b/include/asm-generic/vmlinux.lds.h
> > @@ -934,6 +934,7 @@
> >     *(.discard)                                                     \
> >     *(.discard.*)                                                   \
> >     *(.modinfo)                                                     \
> > +   *(.gnu.version*)                                                \
> >     }
> > 
> > /**
> > -- 
> > 2.25.1
> 
> I wonder what lead to .gnu.version{,_d,_r} sections in the kernel.

Here's where I see it:

ld: warning: orphan section `.gnu.version_d' from 
`arch/x86/boot/compressed/kernel_info.o' being placed in section 
`.gnu.version_d'

-- 
Kees Cook