[Help] all __gshared vairable address is 0.

[lili]

Hi:
     I'm writing a OS kernel in D. I meet a problem that all bss 
variables's address is same
     and is 0.

    see code below:

extern(C) extern __gshared ulong  p4_table; //defined in a boot.s 
file
__gshared int xx= void;
abstract final class Vga
{
     void init()
     {
         clearScreen();
         Vga.println(cast(ulong)p4_table); //0
         Vga.println(cast(ulong)&xx); //0
     }
but i see the link map file p4_table and xx has different address.

                 0x0000000000104000                __bss = .
  *(.bss)
  .bss           0x0000000000104000    0x15000 boot.o
                 0x0000000000104000                p4_table
                 0x0000000000105000                p3_table
                 0x0000000000106000                p2_table
                 0x0000000000108000                idt_addr
  *(.bss.*)
  .bss.xx        0x0000000000119000        0x4 vga.o
                 0x0000000000119000                xx

  and when i call asm_fn in d the return value of asm_fn is return 
0x106000 not 0.
  so why did it occur.


[global asm_fn]
asm_fn:
	mov rax, p2_table
	ret

src  https://github.com/lilijreey/OS-D