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

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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@xxxxxxxxx>

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



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