Revert "Revert "LONG MODE MULTIBOOT WORKS gsp!""

This reverts commit ff2841c0ad894030a34f3a3db19bb55e68271083.

boot/loader/loader.asm

@@ -108,6 +108,7 @@ lnext:
 %include "boot/loader/mem/structures.inc"
 lnext2:
     call Setup_paging
+    call Go64
     jmp lnext3
 %include "boot/loader/mem/management.inc"
 

boot/loader/mem/management.inc

@@ -57,6 +57,8 @@ Setup_paging:
 ;    Enable long mode and paging                                               ;
 ; ---------------------------------------------------------------------------- ;
 Go64:
+    pusha
+
     ;; Registering paging
     mov eax, PML4_table
     mov cr3, eax                    ; Load PML4 to cr3
@@ -78,5 +80,10 @@ Go64:
                                     ;     |
                                     ;     `------ Paging bit
     mov cr0, eax
+    jmp .end
+    nop
+    nop
+.end:
 
+    popa
     ret

boot/loader/mem/structures.inc

@@ -26,7 +26,7 @@
 [BITS 32]
 
 ;; GDT WITH DOC
-ALIGN 4
+ALIGN 4096
 GDT64:
         NULL_SELECTOR:    ;; null selector within 64 bits
                         dw  GDT_LENGTH      ; limit of GDT
@@ -104,7 +104,7 @@ GDT64:
     GDT_LENGTH:
 
 ;; EMPTY PAGE TABLES (identity of the first 1GiB)
-ALIGN 4
+ALIGN 4096
 PML4_table:
     resb 4096
 PDP_table: