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

[André Hentschel]

Am 16.11.2017 um 14:11 schrieb Alexandre Julliard:
> André Hentschel <nerv at dawncrow.de> 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?
> 

512GB is the lowest guaranteed address space limit as per https://www.kernel.org/doc/Documentation/arm64/memory.txt
For the moment that configuration is very common and I would add this until a Windows application needs more