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

MdePkg BaseLib still uses the inline X86 assembly code
in C code files.For now, inline SetJump/LongJump() can be removed.
https://bugzilla.tianocore.org/show_bug.cgi?id=1163

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

2 files changed, 0 insertions, 165 deletions

diff --git a/MdePkg/Library/BaseLib/Ia32/LongJump.c b/MdePkg/Library/BaseLib/Ia32/LongJump.c
deleted file mode 100644
index cf5fc5b..0000000
--- a/MdePkg/Library/BaseLib/Ia32/LongJump.c
+++ /dev/null
@@ -1,70 +0,0 @@
-/** @file

-  Implementation of _LongJump() on IA-32.

-

-  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>

-  SPDX-License-Identifier: BSD-2-Clause-Patent

-

-**/

-

-

-#include "BaseLibInternals.h"

-

-

-/**

-  Restores the CPU context that was saved with SetJump().

-

-  Restores the CPU context from the buffer specified by JumpBuffer.

-  This function never returns to the caller.

-  Instead is resumes execution based on the state of JumpBuffer.

-

-  @param  JumpBuffer    A pointer to CPU context buffer.

-  @param  Value         The value to return when the SetJump() context is restored.

-

-**/

-__declspec (naked)

-VOID

-EFIAPI

-InternalLongJump (

-  IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer,

-  IN      UINTN                     Value

-  )

-{

-  _asm {

-    mov     eax, [PcdGet32 (PcdControlFlowEnforcementPropertyMask)]

-    test    eax, eax

-    jz      CetDone

-    _emit      0x0F

-    _emit      0x20

-    _emit      0xE0                ; mov     eax, cr4

-    bt      eax, 23                ; check if CET is enabled

-    jnc     CetDone

-

-    mov     edx, [esp + 4]         ; edx = JumpBuffer

-    mov     edx, [edx + 24]        ; edx = target SSP

-    _emit      0xF3

-    _emit      0x0F

-    _emit      0x1E

-    _emit      0xC8                ; READSSP EAX

-    sub     edx, eax               ; edx = delta

-    mov     eax, edx               ; eax = delta

-

-    shr     eax, 2                 ; eax = delta/sizeof(UINT32)

-    _emit      0xF3

-    _emit      0x0F

-    _emit      0xAE

-    _emit      0xE8                ; INCSSP EAX

-

-CetDone:

-

-    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 ptr [edx + 20]

-  }

-}

-

diff --git a/MdePkg/Library/BaseLib/Ia32/SetJump.c b/MdePkg/Library/BaseLib/Ia32/SetJump.c
deleted file mode 100644
index 4a28490..0000000
--- a/MdePkg/Library/BaseLib/Ia32/SetJump.c
+++ /dev/null
@@ -1,95 +0,0 @@
-/** @file

-  Implementation of SetJump() on IA-32.

-

-  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>

-  SPDX-License-Identifier: BSD-2-Clause-Patent

-

-**/

-

-

-#include "BaseLibInternals.h"

-

-/**

-  Worker function that checks ASSERT condition for JumpBuffer

-

-  Checks ASSERT condition for JumpBuffer.

-

-  If JumpBuffer is NULL, then ASSERT().

-  For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().

-

-  @param  JumpBuffer    A pointer to CPU context buffer.

-

-**/

-VOID

-EFIAPI

-InternalAssertJumpBuffer (

-  IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer

-  );

-

-/**

-  Saves the current CPU context that can be restored with a call to LongJump()

-  and returns 0.

-

-  Saves the current CPU context in the buffer specified by JumpBuffer and

-  returns 0. The initial call to SetJump() must always return 0. Subsequent

-  calls to LongJump() cause a non-zero value to be returned by SetJump().

-

-  If JumpBuffer is NULL, then ASSERT().

-  For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().

-

-  @param  JumpBuffer  A pointer to CPU context buffer.

-

-  @retval 0 Indicates a return from SetJump().

-

-**/

-_declspec (naked)

-RETURNS_TWICE

-UINTN

-EFIAPI

-SetJump (

-  OUT     BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer

-  )

-{

-  _asm {

-    push    [esp + 4]

-    call    InternalAssertJumpBuffer

-    pop     ecx

-    pop     ecx

-    mov     edx, [esp]

-

-    xor     eax, eax

-    mov     [edx + 24], eax        ; save 0 to SSP

-

-    mov     eax, [PcdGet32 (PcdControlFlowEnforcementPropertyMask)]

-    test    eax, eax

-    jz      CetDone

-    _emit      0x0F

-    _emit      0x20

-    _emit      0xE0                ; mov     eax, cr4

-    bt      eax, 23                ; check if CET is enabled

-    jnc     CetDone

-

-    mov     eax, 1

-    _emit      0xF3

-    _emit      0x0F

-    _emit      0xAE

-    _emit      0xE8                ; INCSSP EAX to read original SSP

-    _emit      0xF3

-    _emit      0x0F

-    _emit      0x1E

-    _emit      0xC8                ; READSSP EAX

-    mov     [edx + 0x24], eax      ; save SSP

-

-CetDone:

-

-    mov     [edx], ebx

-    mov     [edx + 4], esi

-    mov     [edx + 8], edi

-    mov     [edx + 12], ebp

-    mov     [edx + 16], esp

-    mov     [edx + 20], ecx

-    xor     eax, eax

-    jmp     ecx

-  }

-}

-