diff --git a/boot/loader/loader.asm b/boot/loader/loader.asm
index 001d524..c3b47dd 100644
--- a/boot/loader/loader.asm
+++ b/boot/loader/loader.asm
@@ -170,6 +170,7 @@ _loader64:
     call write
 
     mov qword [newKernelEnd], KERNEL_STACK
+    mov qword [realKernelEnd], realKernelEnd
     mov rdi, [mbInfo]
     mov rsi, [mbMagic]
     mov rdx, GDT64.code
diff --git a/boot/loader/mem/structures.inc b/boot/loader/mem/structures.inc
index b5ba719..55ed82c 100644
--- a/boot/loader/mem/structures.inc
+++ b/boot/loader/mem/structures.inc
@@ -26,11 +26,12 @@
 [BITS 32]
 extern kernelEnd
 global newKernelEnd
+global realKernelEnd
 
 [section .text]
 KERNEL_STACK        equ kernelEnd + 4096 * 2 * 1024 ; 8MB of stack
 newKernelEnd        dq  0x0
-
+realKernelEnd       dq  0x0
 [section .rodata]
 ;; GDT WITH DOC
 ALIGN 4096
diff --git a/kaleid/kernel/cpu/cpuf.asm b/kaleid/kernel/cpu/cpuf.asm
index 4315752..232f145 100644
--- a/kaleid/kernel/cpu/cpuf.asm
+++ b/kaleid/kernel/cpu/cpuf.asm
@@ -22,5 +22,10 @@
 ;   along with OS/K.  If not, see <https://www.gnu.org/licenses/>.             ;
 ;=----------------------------------------------------------------------------=;
 
+%include "kaleid/kernel/cpu/cpuf.inc"
+
 CpuCpuid:
-    
+    pushAll
+    mov rax, rsi
+    cpuid
+    popAll
diff --git a/kaleid/kernel/init/init.c b/kaleid/kernel/init/init.c
index 5c7bcd9..5a8be24 100644
--- a/kaleid/kernel/init/init.c
+++ b/kaleid/kernel/init/init.c
@@ -62,6 +62,8 @@ noreturn void BtStartKern(multiboot_info_t *mbInfo, uint mbMagic, void *codeSeg)
     IoGetRtcTimeChar();
     IoPrintRtcTime();
 
+    KernLog("%d\n",realKernelEnd);
+
     KeStartShell();
 
     KernLog("End of input reached\n");