Re: [RFC PATCH v9 21/27] binfmt_elf: Define GNU_PROPERTY_X86_FEATURE_1_AND

Kees Cook
2020-02-25T21:18:53Z

On Wed, Feb 05, 2020 at 10:19:29AM -0800, Yu-cheng Yu wrote:
> An ELF file's .note.gnu.property indicates architecture features of
> the file. Introduce feature definitions for Control-flow Enforcement
> Technology (CET): Shadow Stack and Indirect Branch Tracking.
>
> Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>

Why not merge with patch 20?

-Kees

> ---
> include/uapi/linux/elf.h | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
> index c37731407074..61251ecabdd7 100644
> --- a/include/uapi/linux/elf.h
> +++ b/include/uapi/linux/elf.h
> @@ -444,4 +444,11 @@ typedef struct elf64_note {
> Elf64_Word n_type; /* Content type */
> } Elf64_Nhdr;
>
> +/* .note.gnu.property types */
> +#define GNU_PROPERTY_X86_FEATURE_1_AND 0xc0000002
> +
> +/* Bits of GNU_PROPERTY_X86_FEATURE_1_AND */
> +#define GNU_PROPERTY_X86_FEATURE_1_IBT 0x00000001
> +#define GNU_PROPERTY_X86_FEATURE_1_SHSTK 0x00000002
> +
> #endif /* _UAPI_LINUX_ELF_H */
> --
> 2.21.0
>

--
Kees Cook