# Re: \[PATCH v6 1/6\] uapi: Define the aux vector AT\_MINSIGSTKSZ

- From: Borislav Petkov \<hidden\>
- Date: 2021-03-02 02:28:53 
- List: linux-arch
- Page: https://ratatoskr.run/linux-arch/2021/03/6283528
- Thread: https://ratatoskr.run/linux-arch/2021/02/6280684/t.md

```text
On Sat, Feb 27, 2021 at 08:59:06AM -0800, Chang S. Bae wrote:
> Define the AT_MINSIGSTKSZ in generic Linux. It is already used as generic
> ABI in glibc's generic elf.h, and this define will prevent future namespace
> conflicts. In particular, x86 is also using this generic definition.
> 
> Signed-off-by: Chang S. Bae <redacted>
> Reviewed-by: Len Brown <redacted>
> Cc: Carlos O'Donell <redacted>
> Cc: Dave Martin <Dave.Martin@arm.com>
> Cc: <redacted>
> Cc: <redacted>
> Cc: <redacted>
> Cc: <redacted>
> Cc: <redacted>
> ---
> Change from v5:
> * Reverted the arm64 change. (Dave Martin)
> * Massaged the changelog.
> 
> Change from v4:
> * Added as a new patch (Carlos O'Donell)
> ---
>  include/uapi/linux/auxvec.h | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/include/uapi/linux/auxvec.h b/include/uapi/linux/auxvec.h
> index abe5f2b6581b..15be98c75174 100644
> --- a/include/uapi/linux/auxvec.h
> +++ b/include/uapi/linux/auxvec.h
> @@ -33,5 +33,8 @@
>  
>  #define AT_EXECFN  31	/* filename of program */
>  
> +#ifndef AT_MINSIGSTKSZ
> +#define AT_MINSIGSTKSZ	51	/* stack needed for signal delivery  */

I know glibc's comment says a similar thing but the correct thing to say
here should be "minimal stack size for signal delivery" or so. Even the
variable name alludes to that too.

-- 
Regards/Gruss,
    Boris.

SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg
```