sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

UefiCpuPkg: Replace Opcode with the corresponding instructions.

Browse Source 
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3790

Replace Opcode with the corresponding instructions.
The code changes have been verified with CompareBuild.py tool, which
can be used to compare the results of two different EDK II builds to
determine if they generate the same binaries.
(tool link: https://github.com/mdkinney/edk2/tree/sandbox/CompareBuild)

Signed-off-by: Jason Lou <yun.lou@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
This commit is contained in:
Jason
2022-01-10 22:01:18 +08:00
committed by mergify[bot]
parent 7bc8b1d9f4
commit 2aa107c0aa
10 changed files with 43 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/Xcode5ExceptionHandlerAsm.nasm
View File

@@ -1,5 +1,5 @@
;------------------------------------------------------------------------------ ;
; Copyright (c) 2012 - 2018, Intel Corporation. All rights reserved.<BR>
; Copyright (c) 2012 - 2022, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; Module Name:
@@ -54,12 +54,13 @@ SECTION .text
ALIGN 8
AsmIdtVectorBegin:
%assign Vector 0
%rep 32
db 0x6a ; push #VectorNum
db ($ - AsmIdtVectorBegin) / ((AsmIdtVectorEnd - AsmIdtVectorBegin) / 32) ; VectorNum
push byte %[Vector]
push rax
mov rax, strict qword 0 ; mov rax, ASM_PFX(CommonInterruptEntry)
jmp rax
%assign Vector Vector+1
%endrep
AsmIdtVectorEnd:
@@ -280,7 +281,7 @@ DrFinish:
;; FX_SAVE_STATE_X64 FxSaveState;
sub rsp, 512
mov rdi, rsp
db 0xf, 0xae, 0x7 ;fxsave [rdi]
fxsave [rdi]
;; UEFI calling convention for x64 requires that Direction flag in EFLAGs is clear
cld
@@ -335,15 +336,15 @@ DrFinish:
jz CetDone
; SSP should be 0xFC0 at this point
mov rax, 0x04 ; advance past cs:lip:prevssp;supervisor shadow stack token
INCSSP_RAX ; After this SSP should be 0xFE0
SAVEPREVSSP ; now the shadow stack restore token will be created at 0xFB8
READSSP_RAX ; Read new SSP, SSP should be 0xFE8
incsspq rax ; After this SSP should be 0xFE0
saveprevssp ; now the shadow stack restore token will be created at 0xFB8
rdsspq rax ; Read new SSP, SSP should be 0xFE8
sub rax, 0x10
CLRSSBSY_RAX ; Clear token at 0xFD8, SSP should be 0 after this
clrssbsy [rax] ; Clear token at 0xFD8, SSP should be 0 after this
sub rax, 0x20
RSTORSSP_RAX ; Restore to token at 0xFB8, new SSP will be 0xFB8
rstorssp [rax] ; Restore to token at 0xFB8, new SSP will be 0xFB8
mov rax, 0x01 ; Pop off the new save token created
INCSSP_RAX ; SSP should be 0xFC0 now
incsspq rax ; SSP should be 0xFC0 now
CetDone:
cli
@@ -353,7 +354,7 @@ CetDone:
;; FX_SAVE_STATE_X64 FxSaveState;
mov rsi, rsp
db 0xf, 0xae, 0xE ; fxrstor [rsi]
fxrstor [rsi]
add rsp, 512
;; UINT64 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
@@ -440,8 +441,7 @@ DoReturn:
push qword [rax + 0x18] ; save EFLAGS in new location
mov rax, [rax] ; restore rax
popfq ; restore EFLAGS
DB 0x48 ; prefix to composite "retq" with next "retf"
retf ; far return
retfq
DoIret:
iretq