From 0aac2f777a688a146050bed47753e2dcf801d3c7 Mon Sep 17 00:00:00 2001
From: "Yao, Jiewen" <jiewen.yao@intel.com>
Date: Fri, 22 Feb 2019 21:30:34 +0800
Subject: MdePkg/BaseLib: Add Shadow Stack Support for X86.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1521

This patch adds SSP - shadow stack pointer to JumpBuffer.
It will be used for the platform that enabled CET/ShadowStack.

We add gEfiMdePkgTokenSpaceGuid.PcdControlFlowEnforcementPropertyMask
to control the global enable/disable.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yao Jiewen <jiewen.yao@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
---
 MdePkg/Include/Library/BaseLib.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'MdePkg/Include')

diff --git a/MdePkg/Include/Library/BaseLib.h b/MdePkg/Include/Library/BaseLib.h
index 9c42f82a7d..616ba2e95b 100644
--- a/MdePkg/Include/Library/BaseLib.h
+++ b/MdePkg/Include/Library/BaseLib.h
@@ -31,6 +31,7 @@ typedef struct {
   UINT32                            Ebp;
   UINT32                            Esp;
   UINT32                            Eip;
+  UINT32                            Ssp;
 } BASE_LIBRARY_JUMP_BUFFER;
 
 #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 4
@@ -54,6 +55,7 @@ typedef struct {
   UINT64                            Rip;
   UINT64                            MxCsr;
   UINT8                             XmmBuffer[160]; ///< XMM6-XMM15.
+  UINT64                            Ssp;
 } BASE_LIBRARY_JUMP_BUFFER;
 
 #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 8
-- 
cgit v1.2.3