[edk2-devel] [PATCH] UefiCpuPkg/CpuDxe: Fix boot error

["Guo Dong" <guo.dong@intel.com>]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3084

When DXE drivers are dispatched above 4GB memory and
the system is already in 64bit mode, the address
setCodeSelectorLongJump in stack will be override
by parameter. so change to use 64bit address and
jump to qword address.

Signed-off-by: Guo Dong <guo.dong@intel.com>
---
 UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
index c3489bcc3e..6ad32b49f4 100644
--- a/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
+++ b/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm
@@ -23,8 +23,8 @@ ASM_PFX(SetCodeSelector):
     sub     rsp, 0x10
     lea     rax, [setCodeSelectorLongJump]
     mov     [rsp], rax
-    mov     [rsp+4], cx
-    jmp     dword far [rsp]
+    mov     [rsp+8], cx
+    jmp     qword far [rsp]
 setCodeSelectorLongJump:
     add     rsp, 0x10
     ret
-- 
2.16.2.windows.1