9d510e61fc
https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
82 lines
2.0 KiB
NASM
82 lines
2.0 KiB
NASM
;; @file
|
|
; This is the assembly code for page fault handler hook.
|
|
;
|
|
; Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
|
|
;
|
|
; SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
;
|
|
;;
|
|
|
|
extern ASM_PFX(PageFaultHandler)
|
|
|
|
DEFAULT REL
|
|
SECTION .text
|
|
|
|
global ASM_PFX(PageFaultHandlerHook)
|
|
ASM_PFX(PageFaultHandlerHook):
|
|
add rsp, -0x10
|
|
; save rax
|
|
mov [rsp + 0x8], rax
|
|
|
|
;push rax ; save all volatile registers
|
|
push rcx
|
|
push rdx
|
|
push r8
|
|
push r9
|
|
push r10
|
|
push r11
|
|
; save volatile fp registers
|
|
; 68h + 08h(for alignment)
|
|
add rsp, -0x70
|
|
stmxcsr [rsp + 0x60]
|
|
movdqa [rsp + 0x0], xmm0
|
|
movdqa [rsp + 0x10], xmm1
|
|
movdqa [rsp + 0x20], xmm2
|
|
movdqa [rsp + 0x30], xmm3
|
|
movdqa [rsp + 0x40], xmm4
|
|
movdqa [rsp + 0x50], xmm5
|
|
|
|
add rsp, -0x20
|
|
call ASM_PFX(PageFaultHandler)
|
|
add rsp, 0x20
|
|
|
|
; load volatile fp registers
|
|
ldmxcsr [rsp + 0x60]
|
|
movdqa xmm0, [rsp + 0x0]
|
|
movdqa xmm1, [rsp + 0x10]
|
|
movdqa xmm2, [rsp + 0x20]
|
|
movdqa xmm3, [rsp + 0x30]
|
|
movdqa xmm4, [rsp + 0x40]
|
|
movdqa xmm5, [rsp + 0x50]
|
|
add rsp, 0x70
|
|
|
|
pop r11
|
|
pop r10
|
|
pop r9
|
|
pop r8
|
|
pop rdx
|
|
pop rcx
|
|
;pop rax ; restore all volatile registers
|
|
|
|
add rsp, 0x10
|
|
|
|
; rax returned from PageFaultHandler is NULL or OriginalHandler address
|
|
; NULL if the page fault is handled by PageFaultHandler
|
|
; OriginalHandler address if the page fault is not handled by PageFaultHandler
|
|
test rax, rax
|
|
|
|
; save OriginalHandler address
|
|
mov [rsp - 0x10], rax
|
|
; restore rax
|
|
mov rax, [rsp - 0x8]
|
|
|
|
jz .0
|
|
|
|
; jump to OriginalHandler
|
|
jmp qword [rsp - 0x10]
|
|
|
|
.0:
|
|
add rsp, 0x8 ; skip error code for PF
|
|
iretq
|
|
|