MdePkg/BaseLib: Remove LongJump.c and SetJump.c

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / LongJump.c

diff --git a/MdePkg/Library/BaseLib/Ia32/LongJump.c b/MdePkg/Library/BaseLib/Ia32/LongJump.c
deleted file mode 100644 (file)
index cf5fc5b..0000000
--- a/MdePkg/Library/BaseLib/Ia32/LongJump.c
+++ /dev/null
@@ -1,70 +0,0 @@
-/** @file\r
-  Implementation of _LongJump() on IA-32.\r
-\r
-  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r
-  SPDX-License-Identifier: BSD-2-Clause-Patent\r
-\r
-**/\r
-\r
-\r
-#include "BaseLibInternals.h"\r
-\r
-\r
-/**\r
-  Restores the CPU context that was saved with SetJump().\r
-\r
-  Restores the CPU context from the buffer specified by JumpBuffer.\r
-  This function never returns to the caller.\r
-  Instead is resumes execution based on the state of JumpBuffer.\r
-\r
-  @param  JumpBuffer    A pointer to CPU context buffer.\r
-  @param  Value         The value to return when the SetJump() context is restored.\r
-\r
-**/\r
-__declspec (naked)\r
-VOID\r
-EFIAPI\r
-InternalLongJump (\r
-  IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer,\r
-  IN      UINTN                     Value\r
-  )\r
-{\r
-  _asm {\r
-    mov     eax, [PcdGet32 (PcdControlFlowEnforcementPropertyMask)]\r
-    test    eax, eax\r
-    jz      CetDone\r
-    _emit      0x0F\r
-    _emit      0x20\r
-    _emit      0xE0                ; mov     eax, cr4\r
-    bt      eax, 23                ; check if CET is enabled\r
-    jnc     CetDone\r
-\r
-    mov     edx, [esp + 4]         ; edx = JumpBuffer\r
-    mov     edx, [edx + 24]        ; edx = target SSP\r
-    _emit      0xF3\r
-    _emit      0x0F\r
-    _emit      0x1E\r
-    _emit      0xC8                ; READSSP EAX\r
-    sub     edx, eax               ; edx = delta\r
-    mov     eax, edx               ; eax = delta\r
-\r
-    shr     eax, 2                 ; eax = delta/sizeof(UINT32)\r
-    _emit      0xF3\r
-    _emit      0x0F\r
-    _emit      0xAE\r
-    _emit      0xE8                ; INCSSP EAX\r
-\r
-CetDone:\r
-\r
-    pop     eax                         ; skip return address\r
-    pop     edx                         ; edx <- JumpBuffer\r
-    pop     eax                         ; eax <- Value\r
-    mov     ebx, [edx]\r
-    mov     esi, [edx + 4]\r
-    mov     edi, [edx + 8]\r
-    mov     ebp, [edx + 12]\r
-    mov     esp, [edx + 16]\r
-    jmp     dword ptr [edx + 20]\r
-  }\r
-}\r
-\r