MdePkg NASM Thunk16: Work around NASM 2.09.04 - 2.10rc1 bug

[mirror_edk2.git] / MdePkg / Library / BaseLib / X64 / Thunk16.nasm

diff --git a/MdePkg/Library/BaseLib/X64/Thunk16.nasm b/MdePkg/Library/BaseLib/X64/Thunk16.nasm
index 6084fac8c42cf477c008e450c9cdf5323a9aa158..7c4a8d3e1759f0e22588fe6923af4be2bcabcf40 100644 (file)
--- a/MdePkg/Library/BaseLib/X64/Thunk16.nasm
+++ b/MdePkg/Library/BaseLib/X64/Thunk16.nasm
@@ -83,7 +83,11 @@ _BackFromUserCode:
 BITS    16\r
     push    ss\r
     push    cs\r
-o32 call    dword .Base                 ; push eip\r
+    ;\r
+    ; Note: We can't use o32 on the next instruction because of a bug\r
+    ; in NASM 2.09.04 through 2.10rc1.\r
+    ;\r
+    call    dword .Base                 ; push eip\r
 .Base:\r
     push    dword 0                     ; reserved high order 32 bits of EFlags\r
     pushfd\r