mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-18 15:27:48 +01:00
642 lines
17 KiB
ArmAsm
642 lines
17 KiB
ArmAsm
|
#------------------------------------------------------------------------------ ;
|
||
|
|
# Copyright (c) 2012 - 2014, 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:
|
||
|
|
#
|
||
|
|
# ExceptionHandlerAsm.S
|
||
|
|
#
|
||
|
|
# Abstract:
|
||
|
|
#
|
||
|
|
# x64 CPU Exception Handler
|
||
|
|
#
|
||
|
|
# Notes:
|
||
|
|
#
|
||
|
|
#------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
ASM_GLOBAL ASM_PFX(CommonExceptionHandler)
|
||
|
|
#ASM_GLOBAL ASM_PFX(CommonInterruptEntry)
|
||
|
|
#ASM_GLOBAL ASM_PFX(HookAfterStubHeaderEnd)
|
||
|
|
|
||
|
|
#EXTRN ASM_PFX(mErrorCodeFlag):DWORD # Error code flags for exceptions
|
||
|
|
#EXTRN ASM_PFX(mDoFarReturnFlag):QWORD # Do far return flag
|
||
|
|
.text
|
||
|
|
.align 3
|
||
|
|
|
||
|
|
#
|
||
|
|
# exception handler stub table
|
||
|
|
#
|
||
|
|
Exception0Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 0
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception1Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 1
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception2Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 2
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception3Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 3
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception4Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 4
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception5Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 5
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception6Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 6
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception7Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 7
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception8Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 8
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception9Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 9
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception10Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 10
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception11Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 11
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception12Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 12
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception13Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 13
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception14Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 14
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception15Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 15
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception16Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 16
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception17Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 17
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception18Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 18
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception19Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 19
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception20Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 20
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception21Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 21
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception22Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 22
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception23Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 23
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception24Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 24
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception25Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 25
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception26Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 26
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception27Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 27
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception28Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 28
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception29Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 29
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception30Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 30
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
Exception31Handle:
|
||
|
|
.byte 0x6a # push #VectorNum
|
||
|
|
.byte 31
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8
|
||
|
|
.quad 0 #ASM_PFX(CommonInterruptEntry)
|
||
|
|
jmp *%rax
|
||
|
|
|
||
|
|
HookAfterStubHeaderBegin:
|
||
|
|
.byte 0x6a # push
|
||
|
|
#VectorNum:
|
||
|
|
PatchVectorNum:
|
||
|
|
.byte 0 # 0 will be fixed
|
||
|
|
pushq %rax
|
||
|
|
.byte 0x48, 0xB8 # movq ASM_PFX(HookAfterStubHeaderEnd), %rax
|
||
|
|
# .quad ASM_PFX(HookAfterStubHeaderEnd)
|
||
|
|
PatchFuncAddress:
|
||
|
|
.quad 0
|
||
|
|
jmp *%rax
|
||
|
|
ASM_GLOBAL ASM_PFX(HookAfterStubHeaderEnd)
|
||
|
|
ASM_PFX(HookAfterStubHeaderEnd):
|
||
|
|
movq %rsp, %rax
|
||
|
|
andl $0x0fffffff0, %esp # make sure 16-byte aligned for exception context
|
||
|
|
subq $0x18, %rsp # reserve room for filling exception data later
|
||
|
|
pushq %rcx
|
||
|
|
movq 8(%rax), %rcx
|
||
|
|
# pushq %rax
|
||
|
|
# movabsl ASM_PFX(mErrorCodeFlag), %eax
|
||
|
|
# bt %ecx, %eax
|
||
|
|
# popq %rax
|
||
|
|
bt %ecx, ASM_PFX(mErrorCodeFlag)(%rip)
|
||
|
|
jnc NoErrorData
|
||
|
|
pushq (%rsp) # push additional rcx to make stack alignment
|
||
|
|
NoErrorData:
|
||
|
|
xchgq (%rsp), %rcx # restore rcx, save Exception Number in stack
|
||
|
|
pushq (%rax) # push rax into stack to keep code consistence
|
||
|
|
|
||
|
|
#---------------------------------------;
|
||
|
|
# CommonInterruptEntry ;
|
||
|
|
#---------------------------------------;
|
||
|
|
# The follow algorithm is used for the common interrupt routine.
|
||
|
|
|
||
|
|
ASM_GLOBAL ASM_PFX(CommonInterruptEntry)
|
||
|
|
ASM_PFX(CommonInterruptEntry):
|
||
|
|
cli
|
||
|
|
popq %rax
|
||
|
|
#
|
||
|
|
# All interrupt handlers are invoked through interrupt gates, so
|
||
|
|
# IF flag automatically cleared at the entry point
|
||
|
|
#
|
||
|
|
#
|
||
|
|
# Calculate vector number
|
||
|
|
#
|
||
|
|
xchgq (%rsp), %rcx # get the return address of call, actually, it is the address of vector number.
|
||
|
|
andq $0x0FF, %rcx
|
||
|
|
cmp $32, %ecx # Intel reserved vector for exceptions?
|
||
|
|
jae NoErrorCode
|
||
|
|
pushq %rax
|
||
|
|
# movabsl ASM_PFX(mErrorCodeFlag), %eax
|
||
|
|
movl ASM_PFX(mErrorCodeFlag)(%rip), %eax
|
||
|
|
bt %ecx, %eax
|
||
|
|
popq %rax
|
||
|
|
jc CommonInterruptEntry_al_0000
|
||
|
|
|
||
|
|
NoErrorCode:
|
||
|
|
|
||
|
|
#
|
||
|
|
# Push a dummy error code on the stack
|
||
|
|
# to maintain coherent stack map
|
||
|
|
#
|
||
|
|
pushq (%rsp)
|
||
|
|
movq $0, 8(%rsp)
|
||
|
|
CommonInterruptEntry_al_0000:
|
||
|
|
pushq %rbp
|
||
|
|
movq %rsp, %rbp
|
||
|
|
pushq $0 # check EXCEPTION_HANDLER_CONTEXT.OldIdtHandler
|
||
|
|
pushq $0 # check EXCEPTION_HANDLER_CONTEXT.ExceptionDataFlag
|
||
|
|
|
||
|
|
#
|
||
|
|
# Stack:
|
||
|
|
# +---------------------+ <-- 16-byte aligned ensured by processor
|
||
|
|
# + Old SS +
|
||
|
|
# +---------------------+
|
||
|
|
# + Old RSP +
|
||
|
|
# +---------------------+
|
||
|
|
# + RFlags +
|
||
|
|
# +---------------------+
|
||
|
|
# + CS +
|
||
|
|
# +---------------------+
|
||
|
|
# + RIP +
|
||
|
|
# +---------------------+
|
||
|
|
# + Error Code +
|
||
|
|
# +---------------------+
|
||
|
|
# + RCX / Vector Number +
|
||
|
|
# +---------------------+
|
||
|
|
# + RBP +
|
||
|
|
# +---------------------+ <-- RBP, 16-byte aligned
|
||
|
|
#
|
||
|
|
|
||
|
|
|
||
|
|
#
|
||
|
|
# Since here the stack pointer is 16-byte aligned, so
|
||
|
|
# EFI_FX_SAVE_STATE_X64 of EFI_SYSTEM_CONTEXT_x64
|
||
|
|
# is 16-byte aligned
|
||
|
|
#
|
||
|
|
|
||
|
|
#; UINT64 Rdi, Rsi, Rbp, Rsp, Rbx, Rdx, Rcx, Rax;
|
||
|
|
#; UINT64 R8, R9, R10, R11, R12, R13, R14, R15;
|
||
|
|
pushq %r15
|
||
|
|
pushq %r14
|
||
|
|
pushq %r13
|
||
|
|
pushq %r12
|
||
|
|
pushq %r11
|
||
|
|
pushq %r10
|
||
|
|
pushq %r9
|
||
|
|
pushq %r8
|
||
|
|
pushq %rax
|
||
|
|
pushq 8(%rbp) # RCX
|
||
|
|
pushq %rdx
|
||
|
|
pushq %rbx
|
||
|
|
pushq 48(%rbp) # RSP
|
||
|
|
pushq (%rbp) # RBP
|
||
|
|
pushq %rsi
|
||
|
|
pushq %rdi
|
||
|
|
|
||
|
|
#; UINT64 Gs, Fs, Es, Ds, Cs, Ss; insure high 16 bits of each is zero
|
||
|
|
movzwq 56(%rbp), %rax
|
||
|
|
pushq %rax # for ss
|
||
|
|
movzwq 32(%rbp), %rax
|
||
|
|
pushq %rax # for cs
|
||
|
|
movl %ds, %eax
|
||
|
|
pushq %rax
|
||
|
|
movl %es, %eax
|
||
|
|
pushq %rax
|
||
|
|
movl %fs, %eax
|
||
|
|
pushq %rax
|
||
|
|
movl %gs, %eax
|
||
|
|
pushq %rax
|
||
|
|
|
||
|
|
movq %rcx, 8(%rbp) # save vector number
|
||
|
|
|
||
|
|
#; UINT64 Rip;
|
||
|
|
pushq 24(%rbp)
|
||
|
|
|
||
|
|
#; UINT64 Gdtr[2], Idtr[2];
|
||
|
|
xorq %rax, %rax
|
||
|
|
pushq %rax
|
||
|
|
pushq %rax
|
||
|
|
sidt (%rsp)
|
||
|
|
xchgq 2(%rsp), %rax
|
||
|
|
xchgq (%rsp), %rax
|
||
|
|
xchgq 8(%rsp), %rax
|
||
|
|
|
||
|
|
xorq %rax, %rax
|
||
|
|
pushq %rax
|
||
|
|
pushq %rax
|
||
|
|
sgdt (%rsp)
|
||
|
|
xchgq 2(%rsp), %rax
|
||
|
|
xchgq (%rsp), %rax
|
||
|
|
xchgq 8(%rsp), %rax
|
||
|
|
|
||
|
|
#; UINT64 Ldtr, Tr;
|
||
|
|
xorq %rax, %rax
|
||
|
|
str %ax
|
||
|
|
pushq %rax
|
||
|
|
sldt %ax
|
||
|
|
pushq %rax
|
||
|
|
|
||
|
|
#; UINT64 RFlags;
|
||
|
|
pushq 40(%rbp)
|
||
|
|
|
||
|
|
#; UINT64 Cr0, Cr1, Cr2, Cr3, Cr4, Cr8;
|
||
|
|
movq %cr8, %rax
|
||
|
|
pushq %rax
|
||
|
|
movq %cr4, %rax
|
||
|
|
orq $0x208, %rax
|
||
|
|
movq %rax, %cr4
|
||
|
|
pushq %rax
|
||
|
|
mov %cr3, %rax
|
||
|
|
pushq %rax
|
||
|
|
mov %cr2, %rax
|
||
|
|
pushq %rax
|
||
|
|
xorq %rax, %rax
|
||
|
|
pushq %rax
|
||
|
|
mov %cr0, %rax
|
||
|
|
pushq %rax
|
||
|
|
|
||
|
|
#; UINT64 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
||
|
|
movq %dr7, %rax
|
||
|
|
pushq %rax
|
||
|
|
movq %dr6, %rax
|
||
|
|
pushq %rax
|
||
|
|
movq %dr3, %rax
|
||
|
|
pushq %rax
|
||
|
|
movq %dr2, %rax
|
||
|
|
pushq %rax
|
||
|
|
movq %dr1, %rax
|
||
|
|
pushq %rax
|
||
|
|
movq %dr0, %rax
|
||
|
|
pushq %rax
|
||
|
|
|
||
|
|
#; FX_SAVE_STATE_X64 FxSaveState;
|
||
|
|
subq $512, %rsp
|
||
|
|
movq %rsp, %rdi
|
||
|
|
.byte 0x0f, 0x0ae, 0x07 #fxsave [rdi]
|
||
|
|
|
||
|
|
#; UEFI calling convention for x64 requires that Direction flag in EFLAGs is clear
|
||
|
|
cld
|
||
|
|
|
||
|
|
#; UINT32 ExceptionData;
|
||
|
|
pushq 16(%rbp)
|
||
|
|
|
||
|
|
#; Prepare parameter and call
|
||
|
|
mov 8(%rbp), %rcx
|
||
|
|
mov %rsp, %rdx
|
||
|
|
#
|
||
|
|
# Per X64 calling convention, allocate maximum parameter stack space
|
||
|
|
# and make sure RSP is 16-byte aligned
|
||
|
|
#
|
||
|
|
subq $40, %rsp
|
||
|
|
call ASM_PFX(CommonExceptionHandler)
|
||
|
|
addq $40, %rsp
|
||
|
|
|
||
|
|
cli
|
||
|
|
#; UINT64 ExceptionData;
|
||
|
|
addq $8, %rsp
|
||
|
|
|
||
|
|
#; FX_SAVE_STATE_X64 FxSaveState;
|
||
|
|
|
||
|
|
movq %rsp, %rsi
|
||
|
|
.byte 0x0f, 0x0ae, 0x0E # fxrstor [rsi]
|
||
|
|
addq $512, %rsp
|
||
|
|
|
||
|
|
#; UINT64 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
||
|
|
#; Skip restoration of DRx registers to support in-circuit emualators
|
||
|
|
#; or debuggers set breakpoint in interrupt/exception context
|
||
|
|
addq $48, %rsp
|
||
|
|
|
||
|
|
#; UINT64 Cr0, Cr1, Cr2, Cr3, Cr4, Cr8;
|
||
|
|
popq %rax
|
||
|
|
movq %rax, %cr0
|
||
|
|
addq $8, %rsp # not for Cr1
|
||
|
|
popq %rax
|
||
|
|
movq %rax, %cr2
|
||
|
|
popq %rax
|
||
|
|
movq %rax, %cr3
|
||
|
|
popq %rax
|
||
|
|
movq %rax, %cr4
|
||
|
|
popq %rax
|
||
|
|
movq %rax, %cr8
|
||
|
|
|
||
|
|
#; UINT64 RFlags;
|
||
|
|
popq 40(%rbp)
|
||
|
|
|
||
|
|
#; UINT64 Ldtr, Tr;
|
||
|
|
#; UINT64 Gdtr[2], Idtr[2];
|
||
|
|
#; Best not let anyone mess with these particular registers...
|
||
|
|
addq $48, %rsp
|
||
|
|
|
||
|
|
#; UINT64 Rip;
|
||
|
|
popq 24(%rbp)
|
||
|
|
|
||
|
|
#; UINT64 Gs, Fs, Es, Ds, Cs, Ss;
|
||
|
|
popq %rax
|
||
|
|
# mov %rax, %gs ; not for gs
|
||
|
|
popq %rax
|
||
|
|
# mov %rax, %fs ; not for fs
|
||
|
|
# (X64 will not use fs and gs, so we do not restore it)
|
||
|
|
popq %rax
|
||
|
|
movl %eax, %es
|
||
|
|
popq %rax
|
||
|
|
movl %eax, %ds
|
||
|
|
popq 32(%rbp) # for cs
|
||
|
|
popq 56(%rbp) # for ss
|
||
|
|
|
||
|
|
#; UINT64 Rdi, Rsi, Rbp, Rsp, Rbx, Rdx, Rcx, Rax;
|
||
|
|
#; UINT64 R8, R9, R10, R11, R12, R13, R14, R15;
|
||
|
|
popq %rdi
|
||
|
|
popq %rsi
|
||
|
|
addq $8, %rsp # not for rbp
|
||
|
|
popq 48(%rbp) # for rsp
|
||
|
|
popq %rbx
|
||
|
|
popq %rdx
|
||
|
|
popq %rcx
|
||
|
|
popq %rax
|
||
|
|
popq %r8
|
||
|
|
popq %r9
|
||
|
|
popq %r10
|
||
|
|
popq %r11
|
||
|
|
popq %r12
|
||
|
|
popq %r13
|
||
|
|
popq %r14
|
||
|
|
popq %r15
|
||
|
|
|
||
|
|
movq %rbp, %rsp
|
||
|
|
popq %rbp
|
||
|
|
addq $16, %rsp
|
||
|
|
cmpq $0, -32(%rsp) # check EXCEPTION_HANDLER_CONTEXT.OldIdtHandler
|
||
|
|
jz DoReturn # check EXCEPTION_HANDLER_CONTEXT.ExceptionDataFlag
|
||
|
|
cmpb $1, -40(%rsp)
|
||
|
|
jz ErrorCode
|
||
|
|
jmp *-32(%rsp)
|
||
|
|
ErrorCode:
|
||
|
|
subq $8, %rsp
|
||
|
|
jmp *-24(%rsp)
|
||
|
|
|
||
|
|
DoReturn:
|
||
|
|
pushq %rax
|
||
|
|
# movabsq ASM_PFX(mDoFarReturnFlag), %rax
|
||
|
|
movq ASM_PFX(mDoFarReturnFlag)(%rip), %rax
|
||
|
|
cmpq $0, %rax # Check if need to do far return instead of IRET
|
||
|
|
popq %rax
|
||
|
|
jz DoIret
|
||
|
|
pushq %rax
|
||
|
|
movq %rsp, %rax # save old RSP to rax
|
||
|
|
movq 0x20(%rsp), %rsp
|
||
|
|
pushq 0x10(%rax) # save CS in new location
|
||
|
|
pushq 0x8(%rax) # save EIP in new location
|
||
|
|
pushq 0x18(%rax) # save EFLAGS in new location
|
||
|
|
movq (%rax), %rax # restore rax
|
||
|
|
popfq # restore EFLAGS
|
||
|
|
# .byte 0x48 # prefix to composite "retq" with next "retf"
|
||
|
|
# lretq #retf # far return
|
||
|
|
.byte 0x48 # prefix to composite "retq" with next "retf"
|
||
|
|
#ifdef __APPLE__
|
||
|
|
.byte 0xCB
|
||
|
|
#else
|
||
|
|
retf # far return
|
||
|
|
#endif
|
||
|
|
|
||
|
|
DoIret:
|
||
|
|
iretq
|
||
|
|
|
||
|
|
|
||
|
|
#-------------------------------------------------------------------------------------
|
||
|
|
# AsmGetTemplateAddressMap (&AddressMap);
|
||
|
|
#-------------------------------------------------------------------------------------
|
||
|
|
# comments here for definition of address map
|
||
|
|
ASM_GLOBAL ASM_PFX(AsmGetTemplateAddressMap)
|
||
|
|
ASM_PFX(AsmGetTemplateAddressMap):
|
||
|
|
|
||
|
|
# movabsq $Exception0Handle, %rax
|
||
|
|
# movq %rax, (%rcx)
|
||
|
|
# movq $(Exception1Handle - Exception0Handle), 0x08(%rcx)
|
||
|
|
# movabsq $HookAfterStubHeaderBegin, %rax
|
||
|
|
# movq %rax, 0x10(%rcx)
|
||
|
|
# ret
|
||
|
|
leaq Exception0Handle(%rip), %rax
|
||
|
|
movq %rax, (%rcx)
|
||
|
|
movq $(Exception1Handle - Exception0Handle), 0x08(%rcx)
|
||
|
|
leaq HookAfterStubHeaderBegin(%rip), %rax
|
||
|
|
movq %rax, 0x10(%rcx)
|
||
|
|
ret
|
||
|
|
|
||
|
|
|
||
|
|
#-------------------------------------------------------------------------------------
|
||
|
|
# VOID
|
||
|
|
# EFIAPI
|
||
|
|
# AsmVectorNumFixup (
|
||
|
|
# IN VOID *VectorBase, // RCX
|
||
|
|
# IN UINT8 VectorNum, // RDX
|
||
|
|
# IN BOOLEAN HookStub // R8
|
||
|
|
# );
|
||
|
|
#-------------------------------------------------------------------------------------
|
||
|
|
ASM_GLOBAL ASM_PFX(AsmVectorNumFixup)
|
||
|
|
ASM_PFX(AsmVectorNumFixup):
|
||
|
|
# movq %rdx, %rax
|
||
|
|
# movb %al, (VectorNum - HookAfterStubHeaderBegin)(%rcx)
|
||
|
|
# ret
|
||
|
|
pushq %rbp
|
||
|
|
movq %rsp, %rbp
|
||
|
|
|
||
|
|
# Patch vector #
|
||
|
|
movb %dl, (PatchVectorNum - HookAfterStubHeaderBegin)(%rcx)
|
||
|
|
|
||
|
|
# Patch Function address
|
||
|
|
leaq ASM_PFX(HookAfterStubHeaderEnd)(%rip), %rax
|
||
|
|
leaq ASM_PFX(CommonInterruptEntry)(%rip), %r10
|
||
|
|
testb %r8b, %r8b
|
||
|
|
cmovneq %rax, %r10
|
||
|
|
movq %r10, (PatchFuncAddress - HookAfterStubHeaderBegin)(%rcx)
|
||
|
|
|
||
|
|
popq %rbp
|
||
|
|
ret
|
||
|
|
|
||
|
|
#END
|
||
|
|
|
||
|
|
|