Re: port-amd64/54052: bump STACK_ALIGNBYTES for COMPAT_LINUX

[Joerg Sonnenberger <joerg%bec.de@localhost>]

On Mon, Mar 11, 2019 at 05:50:00AM +0000, rokuyama.rk%gmail.com@localhost wrote:
> >Fix:
> Index: sys/arch/amd64/include/param.h
> ===================================================================
> RCS file: /home/netbsd/src/sys/arch/amd64/include/param.h,v
> retrieving revision 1.29
> diff -p -u -r1.29 param.h
> --- sys/arch/amd64/include/param.h	11 Feb 2019 14:59:32 -0000	1.29
> +++ sys/arch/amd64/include/param.h	10 Mar 2019 13:12:11 -0000
> @@ -23,6 +23,8 @@
>  
>  #define ALIGNED_POINTER(p,t)	1
>  
> +#define STACK_ALIGNBYTES	(16 - 1)	/* COMPAT_LINUX */
> +
>  #define ALIGNBYTES32		(sizeof(int) - 1)
>  #define ALIGN32(p)		(((u_long)(p) + ALIGNBYTES32) &~ALIGNBYTES32)
>  
> 

I'm puzzled by this patch. Stack alignment should already be 16 Bytes on
AMD64.

Joerg