Re: [PATCH v5 0/7] x86/boot: Remove run-time relocations from compressed kernel

Arvind Sankar
2020-07-17T13:47:00Z

On Tue, Jul 14, 2020 at 08:41:26PM -0400, Arvind Sankar wrote:
> The compressed kernel currently contains bogus run-time relocations in
> the startup code in head_{32,64}.S, which are generated by the linker,
> but must not actually be processed at run-time.
>
> This generates warnings when linking with the BFD linker, and errors
> with LLD, which defaults to erroring on run-time relocations in read-only
> sections. It also requires the -z noreloc-overflow hack for the 64-bit
> kernel, which prevents us from linking it as -pie on an older BFD linker
> (<= 2.26) or on LLD, because the locations that are to be apparently
> relocated are only 32-bits in size and so cannot really have
> R_X86_64_RELATIVE relocations.
>
> This series aims to get rid of these relocations. I've build- and
> boot-tested with combinations of clang/gcc-10 with lld/bfd-2.34, and
> gcc-4.9.0 with bfd-2.24, skipping clang on 32-bit because it currently
> has other issues [0].
>

Hi Thomas, Ingo, Borislav, would you be able to take a look over this
series in time for 5.9?

Thanks.