[edk2-devel] [PATCH v5 1/2] MdePkg/Include: Add CET instructions to Nasm.inc

[Sheng Wei]

This is to add instruction SAVEPREVSSP, CLRSSBSY and RSTORSSP_RAX in Nasm.
The open CI is using NASM 2.14.02.
CET instructions are supported since NASM 2.15.01.

DB-encoded CET instructions need to be removed after open CI update to
 NASM 2.15.01.
The BZ ticket is https://bugzilla.tianocore.org/show_bug.cgi?id=3227 .

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3192

Signed-off-by: Sheng Wei <w.sheng at intel.com>
Cc: Michael D Kinney <michael.d.kinney at intel.com>
Cc: Liming Gao <gaoliming at byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu at intel.com>
Cc: Jiewen Yao <jiewen.yao at intel.com>
---
 MdePkg/Include/Ia32/Nasm.inc | 12 ++++++++++++
 MdePkg/Include/X64/Nasm.inc  | 12 ++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/MdePkg/Include/Ia32/Nasm.inc b/MdePkg/Include/Ia32/Nasm.inc
index 31ce861f1e..fa42f9d3e9 100644
--- a/MdePkg/Include/Ia32/Nasm.inc
+++ b/MdePkg/Include/Ia32/Nasm.inc
@@ -9,6 +9,18 @@
 ;
 ;------------------------------------------------------------------------------
 
+%macro SAVEPREVSSP     0
+    DB 0xF3, 0x0F, 0x01, 0xEA
+%endmacro
+
+%macro CLRSSBSY_EAX    0
+    DB 0x67, 0xF3, 0x0F, 0xAE, 0x30
+%endmacro
+
+%macro RSTORSSP_EAX    0
+    DB 0x67, 0xF3, 0x0F, 0x01, 0x28
+%endmacro
+
 %macro SETSSBSY        0
     DB 0xF3, 0x0F, 0x01, 0xE8
 %endmacro
diff --git a/MdePkg/Include/X64/Nasm.inc b/MdePkg/Include/X64/Nasm.inc
index 42412735ea..e57a803c81 100644
--- a/MdePkg/Include/X64/Nasm.inc
+++ b/MdePkg/Include/X64/Nasm.inc
@@ -9,6 +9,18 @@
 ;
 ;------------------------------------------------------------------------------
 
+%macro SAVEPREVSSP     0
+    DB 0xF3, 0x0F, 0x01, 0xEA
+%endmacro
+
+%macro CLRSSBSY_RAX    0
+    DB 0xF3, 0x0F, 0xAE, 0x30
+%endmacro
+
+%macro RSTORSSP_RAX    0
+    DB 0xF3, 0x0F, 0x01, 0x28
+%endmacro
+
 %macro SETSSBSY        0
     DB 0xF3, 0x0F, 0x01, 0xE8
 %endmacro
-- 
2.16.2.windows.1



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