You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
2.5 KiB
84 lines
2.5 KiB
;------------------------------------------------------------------------------
|
|
;
|
|
; Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
|
|
; This program and the accompanying materials
|
|
; are licensed and made available under the terms and conditions of the BSD License
|
|
; which accompanies this distribution. The full text of the license may be found at
|
|
; http://opensource.org/licenses/bsd-license.php.
|
|
;
|
|
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
;
|
|
; Module Name:
|
|
;
|
|
; LongJump.Asm
|
|
;
|
|
; Abstract:
|
|
;
|
|
; Implementation of _LongJump() on x64.
|
|
;
|
|
;------------------------------------------------------------------------------
|
|
|
|
%include "Nasm.inc"
|
|
|
|
DEFAULT REL
|
|
SECTION .text
|
|
|
|
extern ASM_PFX(PcdGet32 (PcdControlFlowEnforcementPropertyMask))
|
|
|
|
;------------------------------------------------------------------------------
|
|
; VOID
|
|
; EFIAPI
|
|
; InternalLongJump (
|
|
; IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer,
|
|
; IN UINTN Value
|
|
; );
|
|
;------------------------------------------------------------------------------
|
|
global ASM_PFX(InternalLongJump)
|
|
ASM_PFX(InternalLongJump):
|
|
|
|
mov eax, [ASM_PFX(PcdGet32 (PcdControlFlowEnforcementPropertyMask))]
|
|
test eax, eax
|
|
jz CetDone
|
|
mov rax, cr4
|
|
bt eax, 23 ; check if CET is enabled
|
|
jnc CetDone
|
|
|
|
push rdx ; save rdx
|
|
|
|
mov rdx, [rcx + 0xF8] ; rdx = target SSP
|
|
READSSP_RAX
|
|
sub rdx, rax ; rdx = delta
|
|
mov rax, rdx ; rax = delta
|
|
|
|
shr rax, 3 ; rax = delta/sizeof(UINT64)
|
|
INCSSP_RAX
|
|
|
|
pop rdx ; restore rdx
|
|
CetDone:
|
|
|
|
mov rbx, [rcx]
|
|
mov rsp, [rcx + 8]
|
|
mov rbp, [rcx + 0x10]
|
|
mov rdi, [rcx + 0x18]
|
|
mov rsi, [rcx + 0x20]
|
|
mov r12, [rcx + 0x28]
|
|
mov r13, [rcx + 0x30]
|
|
mov r14, [rcx + 0x38]
|
|
mov r15, [rcx + 0x40]
|
|
; load non-volatile fp registers
|
|
ldmxcsr [rcx + 0x50]
|
|
movdqu xmm6, [rcx + 0x58]
|
|
movdqu xmm7, [rcx + 0x68]
|
|
movdqu xmm8, [rcx + 0x78]
|
|
movdqu xmm9, [rcx + 0x88]
|
|
movdqu xmm10, [rcx + 0x98]
|
|
movdqu xmm11, [rcx + 0xA8]
|
|
movdqu xmm12, [rcx + 0xB8]
|
|
movdqu xmm13, [rcx + 0xC8]
|
|
movdqu xmm14, [rcx + 0xD8]
|
|
movdqu xmm15, [rcx + 0xE8]
|
|
mov rax, rdx ; set return value
|
|
jmp qword [rcx + 0x48]
|
|
|