[Help!] Use two different assembly symbol in D, but they are same address.

[lili]

On Saturday, 24 August 2019 at 12:55:57 UTC, a11e99z wrote:
> On Saturday, 24 August 2019 at 12:16:34 UTC, lili wrote:
>> On Saturday, 24 August 2019 at 12:09:19 UTC, a11e99z wrote:
>>> On Saturday, 24 August 2019 at 11:53:01 UTC, lili wrote:
>>>>  [...]
>>>
>>> resb 8
>>> just reserving 8 bytes not initializing it.
>>> probably u compare some garbage. sometimes it equals, 
>>> sometimes not.
>>> no?
>>
>> I write wrong, not  if (_vga_x == _vga_y) but if (&_vga_x == 
>> &_vga_y)
>
> try to do next:
> add funtion in asm that returns real addresses to vga_x,y
> extern(C) void asmVgas( int** px, int** py)
> call it
> int *px, *py;
> asmVgas( &px, &py);
> writefln( "%s=%s,%s=%s",px, &_vga_x,py, &_vga_y);
> and see result

I followed your suggest, call asm_fn in d function. it return 
address not 0 but is a correct
address same as the var address show in link map file.
when a try define a __shared int xx, the &xx also 0.
after linked all variables address is 0 that in .bss segment.
do you know why occur this?

[global asm_fn]
asm_fn:
	mov rax, p2_table
	ret