Re: [PATCH 2/3] x86: build reloc tool for both 64 and 32 bit

[Ingo Molnar <mingo@kernel.org>]

* Kees Cook <keescook@chromium.org> wrote:

> Add logic for 64-bit kernel relocations. Since there is no need to
> handle 32 and 64 bit at the same time, refactor away most of the 32/64
> bit ELF differences and split the build into producing two separate
> binaries. Additionally switches to using realloc instead of a two-pass
> approach.
> 
> Heavily based on work by Neill Clift and Michael Davidson.
> 
> Signed-off-by: Kees Cook <keescook@chromium.org>
> Cc: Eric Northup <digitaleric@google.com>
> ---
>  arch/x86/boot/compressed/Makefile |    2 +-
>  arch/x86/realmode/rm/Makefile     |    2 +-
>  arch/x86/tools/.gitignore         |    3 +-
>  arch/x86/tools/Makefile           |   14 +-
>  arch/x86/tools/relocs.c           |  717 ++++++++++++++++++++++++++-----------
>  arch/x86/tools/relocs_32.c        |    1 +
>  arch/x86/tools/relocs_64.c        |    2 +
>  7 files changed, 533 insertions(+), 208 deletions(-)
>  create mode 100644 arch/x86/tools/relocs_32.c
>  create mode 100644 arch/x86/tools/relocs_64.c

This patch too is a bit large and it would be wise to split it into two 
steps: first the refactoring - which is non-functional and should not 
cause any problems in theory - then the change that switches to realloc.

Thanks,

	Ingo