1 files changed, 58 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseLib/X64/LongJump.nasm b/Core/MdePkg/Library/BaseLib/X64/LongJump.nasm
new file mode 100644
index 0000000000..3bac27469e
--- /dev/null
+++ b/Core/MdePkg/Library/BaseLib/X64/LongJump.nasm
@@ -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.
+;
+;------------------------------------------------------------------------------
+
+    DEFAULT REL
+    SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; InternalLongJump (
+;   IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer,
+;   IN      UINTN                     Value
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalLongJump)
+ASM_PFX(InternalLongJump):
+    mov     rbx, [rcx]
+    mov     rsp, [rcx + 8]
+    mov     rbp, [rcx + 0x10]
+    mov     rdi, [rcx + 0x18]
+    mov     rsi, [rcx + 0x20]
+    mov     r12, [rcx + 0x28]
+    mov     r13, [rcx + 0x30]
+    mov     r14, [rcx + 0x38]
+    mov     r15, [rcx + 0x40]
+    ; load non-volatile fp registers
+    ldmxcsr [rcx + 0x50]
+    movdqu  xmm6,  [rcx + 0x58]
+    movdqu  xmm7,  [rcx + 0x68]
+    movdqu  xmm8,  [rcx + 0x78]
+    movdqu  xmm9,  [rcx + 0x88]
+    movdqu  xmm10, [rcx + 0x98]
+    movdqu  xmm11, [rcx + 0xA8]
+    movdqu  xmm12, [rcx + 0xB8]
+    movdqu  xmm13, [rcx + 0xC8]
+    movdqu  xmm14, [rcx + 0xD8]
+    movdqu  xmm15, [rcx + 0xE8]
+    mov     rax, rdx               ; set return value
+    jmp     qword [rcx + 0x48]
+