1 files changed, 43 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/LongJump.nasm b/MdePkg/Library/BaseLib/Ia32/LongJump.nasm
new file mode 100644
index 0000000000..7ef03462ee
--- /dev/null
+++ b/MdePkg/Library/BaseLib/Ia32/LongJump.nasm
@@ -0,0 +1,43 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution.  The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+; Module Name:
+;
+;   LongJump.Asm
+;
+; Abstract:
+;
+;   Implementation of _LongJump() on IA-32.
+;
+;------------------------------------------------------------------------------
+
+    SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; InternalLongJump (
+;   IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer,
+;   IN      UINTN                     Value
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalLongJump)
+ASM_PFX(InternalLongJump):
+    pop     eax                         ; skip return address
+    pop     edx                         ; edx <- JumpBuffer
+    pop     eax                         ; eax <- Value
+    mov     ebx, [edx]
+    mov     esi, [edx + 4]
+    mov     edi, [edx + 8]
+    mov     ebp, [edx + 12]
+    mov     esp, [edx + 16]
+    jmp     dword [edx + 20]        ; restore "eip"
+