UefiCpuPkg/PiSmmCpuDxeSmm: patch "gSmbase" with PatchInstructionX86()

[mirror_edk2.git] / UefiCpuPkg / PiSmmCpuDxeSmm / Ia32 / SmiEntry.nasm

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmiEntry.nasm b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmiEntry.nasm
index a8324a7f4a841e964c41be2dc2ad9cb9a4d6467f..e6e29128e64eb9ebb40094f632e75f259091e33b 100644 (file)
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmiEntry.nasm
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmiEntry.nasm
@@ -46,7 +46,7 @@ global ASM_PFX(gcSmiHandlerTemplate)
 global ASM_PFX(gcSmiHandlerSize)\r
 global ASM_PFX(gSmiCr3)\r
 global ASM_PFX(gSmiStack)\r
-global ASM_PFX(gSmbase)\r
+global ASM_PFX(gPatchSmbase)\r
 global ASM_PFX(mXdSupported)\r
 extern ASM_PFX(gSmiHandlerIdtr)\r
 \r
@@ -65,8 +65,8 @@ _SmiEntryPoint:
 o32 lgdt    [cs:bx]                       ; lgdt fword ptr cs:[bx]\r
     mov     ax, PROTECT_MODE_CS\r
     mov     [cs:bx-0x2],ax\r
-    DB      0x66, 0xbf                   ; mov edi, SMBASE\r
-ASM_PFX(gSmbase): DD 0\r
+    mov     edi, strict dword 0           ; source operand will be patched\r
+ASM_PFX(gPatchSmbase):\r
     lea     eax, [edi + (@32bit - _SmiEntryPoint) + 0x8000]\r
     mov     [cs:bx-0x6],eax\r
     mov     ebx, cr0\r