Re: [PATCH 4/4] ntdll: Limit address space to 512GB on ARM64

[Alexandre Julliard]

André Hentschel  writes:
> @@ -1582,7 +1582,9 @@ void virtual_init(void)
>      assert( !(page_size & page_mask) );
>      page_shift = 0;
>      while ((1 << page_shift) != page_size) page_shift++;
> -#ifdef _WIN64
> +#ifdef __aarch64__
> - address_space_limit = (void *)(((1UL << 39) - 1) & ~page_mask);
>
> +#elif defined(_WIN64)
>      address_space_limit = (void *)(((1UL << 47) - 1) & ~page_mask);
>  #else
>      address_space_limit = (void *)~page_mask;

Why is this necessary?