1 files changed, 58 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/X64/LongJump.asm b/MdePkg/Library/BaseLib/X64/LongJump.asm
new file mode 100644
index 0000000000000..40d77bd8b1ee8
--- /dev/null
+++ b/MdePkg/Library/BaseLib/X64/LongJump.asm
@@ -0,0 +1,58 @@
+;------------------------------------------------------------------------------
+;
+; 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 x64.
+;
+;------------------------------------------------------------------------------
+
+    .code
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; InternalLongJump (
+;   IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer,
+;   IN      UINTN                     Value
+;   );
+;------------------------------------------------------------------------------
+InternalLongJump    PROC
+    mov     rbx, [rcx]
+    mov     rsp, [rcx + 8]
+    mov     rbp, [rcx + 10h]
+    mov     rdi, [rcx + 18h]
+    mov     rsi, [rcx + 20h]
+    mov     r12, [rcx + 28h]
+    mov     r13, [rcx + 30h]
+    mov     r14, [rcx + 38h]
+    mov     r15, [rcx + 40h]
+    ; load non-volatile fp registers
+    ldmxcsr [rcx + 50h]
+    movdqu  xmm6,  [rcx + 58h]
+    movdqu  xmm7,  [rcx + 68h]
+    movdqu  xmm8,  [rcx + 78h]
+    movdqu  xmm9,  [rcx + 88h]
+    movdqu  xmm10, [rcx + 98h]
+    movdqu  xmm11, [rcx + 0A8h]
+    movdqu  xmm12, [rcx + 0B8h]
+    movdqu  xmm13, [rcx + 0C8h]
+    movdqu  xmm14, [rcx + 0D8h]
+    movdqu  xmm15, [rcx + 0E8h]
+    mov     rax, rdx               ; set return value
+    jmp     qword ptr [rcx + 48h]
+InternalLongJump    ENDP
+
+    END