X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=MdePkg%2FLibrary%2FBaseLib%2FX64%2FDisablePaging64.asm;h=48970280549fd9726c8a3732a3c5a323fb6d33e4;hp=5f556a4ca60d986988af930236b9c689785ba1cf;hb=bc810c8977e97c63f081f35d3ca1b2767282c1a3;hpb=47ca9c95885ec58c3c49efb2593692693748a2f1

diff --git a/MdePkg/Library/BaseLib/X64/DisablePaging64.asm b/MdePkg/Library/BaseLib/X64/DisablePaging64.asm
index 5f556a4ca6..4897028054 100644
--- a/MdePkg/Library/BaseLib/X64/DisablePaging64.asm
+++ b/MdePkg/Library/BaseLib/X64/DisablePaging64.asm
@@ -41,7 +41,7 @@ InternalX86DisablePaging64    PROC
     lea     rax, mTransitionEnd         ; rax <- end of transition code
     sub     rax, rsi                    ; rax <- The size of transition piece code 
     add     rax, 4                      ; Round RAX up to the next 4 byte boundary
-    and     rax, 0fffffffch
+    and     al, 0fch
     sub     rdi, rax                    ; rdi <- Use stack to hold transition code
     mov     r10d, edi                   ; r10 <- The start address of transicition code below 4G
     push    rcx                         ; save rcx to stack