[PATCH v6 27/29] x86/boot/compressed: Remove, discard, or assert for unwanted sections

[Kees Cook]

On Fri, Aug 21, 2020 at 04:01:59PM -0400, Arvind Sankar wrote:
> On Fri, Aug 21, 2020 at 12:43:08PM -0700, Kees Cook wrote:
> > In preparation for warning on orphan sections, stop the linker from
> > generating the .eh_frame* sections, discard unwanted non-zero-sized
> > generated sections, and enforce other expected-to-be-zero-sized sections
> > (since discarding them might hide problems with them suddenly gaining
> > unexpected entries).
> > 
> > Signed-off-by: Kees Cook <keescook at chromium.org>
> >  	.rel.dyn : {
> > -		*(.rel.*)
> > +		*(.rel.*) *(.rel_*)
> >  	}
> >  	ASSERT(SIZEOF(.rel.dyn) == 0, "Unexpected run-time relocations (.rel) detected!")
> >  
> >  	.rela.dyn : {
> > -		*(.rela.*)
> > +		*(.rela.*) *(.rela_*)
> >  	}
> >  	ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")
> >  }
> > -- 
> > 2.25.1
> > 
> 
> When do you get .rela_?

i386 builds, IIRC. I can try to hunt that down if you want?

-- 
Kees Cook