UefiCpuPkg/PiSmmCpuDxeSmm: remove *.S and *.asm assembly files
All edk2 toolchains use NASM for compiling X86 assembly source code. We plan to remove X86 *.S and *.asm files globally, in order to reduce maintenance and confusion: http://mid.mail-archive.com/4A89E2EF3DFEDB4C8BFDE51014F606A14E1B9F76@SHSMSX104.ccr.corp.intel.com https://lists.01.org/pipermail/edk2-devel/2018-March/022690.html https://bugzilla.tianocore.org/show_bug.cgi?id=881 Let's start with UefiCpuPkg/PiSmmCpuDxeSmm: remove the *.S and *.asm dialects (both Ia32 and X64) of the SmmInit, SmiEntry, SmiException and MpFuncs sources. Cc: Eric Dong <eric.dong@intel.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=866 Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Andrew Fish <afish@apple.com> Reviewed-by: Liming Gao <liming.gao@intel.com>
This commit is contained in:
Laszlo Ersek
@@ -1,165 +0,0 @@
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#------------------------------------------------------------------------------
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#
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# Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php.
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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# Module Name:
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#
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# MpFuncs.S
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#
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# Abstract:
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#
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# This is the assembly code for Multi-processor S3 support
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#
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#------------------------------------------------------------------------------
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.equ VacantFlag, 0x0
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.equ NotVacantFlag, 0xff
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.equ LockLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart
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.equ StackStart, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x04
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.equ StackSize, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x08
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.equ RendezvousProc, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x0C
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.equ GdtrProfile, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x10
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.equ IdtrProfile, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x16
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.equ BufferStart, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x1C
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#-------------------------------------------------------------------------------------
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#RendezvousFunnelProc procedure follows. All APs execute their procedure. This
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#procedure serializes all the AP processors through an Init sequence. It must be
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#noted that APs arrive here very raw...ie: real mode, no stack.
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#ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC
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#IS IN MACHINE CODE.
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#-------------------------------------------------------------------------------------
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#RendezvousFunnelProc (&WakeUpBuffer,MemAddress);
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ASM_GLOBAL ASM_PFX(RendezvousFunnelProc)
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ASM_PFX(RendezvousFunnelProc):
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RendezvousFunnelProcStart:
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# At this point CS = 0x(vv00) and ip= 0x0.
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.byte 0x8c,0xc8 # mov ax, cs
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.byte 0x8e,0xd8 # mov ds, ax
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.byte 0x8e,0xc0 # mov es, ax
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.byte 0x8e,0xd0 # mov ss, ax
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.byte 0x33,0xc0 # xor ax, ax
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.byte 0x8e,0xe0 # mov fs, ax
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.byte 0x8e,0xe8 # mov gs, ax
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flat32Start:
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.byte 0xBE
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.word BufferStart
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.byte 0x66,0x8B,0x14 # mov edx,dword ptr [si] ; EDX is keeping the start address of wakeup buffer
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.byte 0xBE
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.word GdtrProfile
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.byte 0x66 # db 66h
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.byte 0x2E,0xF,0x1,0x14 # lgdt fword ptr cs:[si]
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.byte 0xBE
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.word IdtrProfile
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.byte 0x66 # db 66h
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.byte 0x2E,0xF,0x1,0x1C # lidt fword ptr cs:[si]
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.byte 0x33,0xC0 # xor ax, ax
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.byte 0x8E,0xD8 # mov ds, ax
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.byte 0xF,0x20,0xC0 # mov eax, cr0 ; Get control register 0
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.byte 0x66,0x83,0xC8,0x1 # or eax, 000000001h ; Set PE bit (bit #0)
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.byte 0xF,0x22,0xC0 # mov cr0, eax
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FLAT32_JUMP:
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.byte 0x66,0x67,0xEA # far jump
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.long 0x0 # 32-bit offset
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.word 0x20 # 16-bit selector
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PMODE_ENTRY: # protected mode entry point
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movw $0x8,%ax
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.byte 0x66
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movw %ax,%ds
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.byte 0x66
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movw %ax,%es
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.byte 0x66
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movw %ax,%fs
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.byte 0x66
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movw %ax,%gs
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.byte 0x66
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movw %ax,%ss # Flat mode setup.
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movl %edx,%esi
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movl %esi,%edi
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addl $LockLocation, %edi
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movb $NotVacantFlag, %al
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TestLock:
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xchgb (%edi), %al
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cmpb $NotVacantFlag, %al
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jz TestLock
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ProgramStack:
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movl %esi,%edi
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addl $StackSize, %edi
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movl (%edi),%eax
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movl %esi,%edi
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addl $StackStart, %edi
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addl (%edi),%eax
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movl %eax,%esp
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movl %eax,(%edi)
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Releaselock:
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movb $VacantFlag, %al
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movl %esi,%edi
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addl $LockLocation, %edi
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xchgb (%edi), %al
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#
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# Call assembly function to initialize FPU.
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#
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lea ASM_PFX(InitializeFloatingPointUnits), %ebx
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call *%ebx
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#
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# Call C Function
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#
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movl %esi,%edi
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addl $RendezvousProc, %edi
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movl (%edi),%eax
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testl %eax,%eax
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jz GoToSleep
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call *%eax # Call C function
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GoToSleep:
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cli
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hlt
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jmp GoToSleep
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RendezvousFunnelProcEnd:
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#-------------------------------------------------------------------------------------
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# AsmGetAddressMap (&AddressMap);
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#-------------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(AsmGetAddressMap)
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ASM_PFX(AsmGetAddressMap):
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pushal
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movl %esp,%ebp
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movl 0x24(%ebp), %ebx
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movl $RendezvousFunnelProcStart, (%ebx)
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movl $(PMODE_ENTRY - RendezvousFunnelProcStart), 0x4(%ebx)
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movl $(FLAT32_JUMP - RendezvousFunnelProcStart), 0x8(%ebx)
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movl $(RendezvousFunnelProcEnd - RendezvousFunnelProcStart), 0x0c(%ebx)
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popal
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ret
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@@ -1,168 +0,0 @@
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;------------------------------------------------------------------------------ ;
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; Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
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; This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php.
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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; Module Name:
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;
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; MpFuncs.asm
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;
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; Abstract:
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;
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; This is the assembly code for Multi-processor S3 support
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;
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;-------------------------------------------------------------------------------
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.686p
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.model flat,C
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.code
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EXTERN InitializeFloatingPointUnits:PROC
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VacantFlag Equ 00h
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NotVacantFlag Equ 0ffh
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LockLocation equ RendezvousFunnelProcEnd - RendezvousFunnelProcStart
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StackStart equ LockLocation + 4h
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StackSize equ LockLocation + 8h
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RendezvousProc equ LockLocation + 0Ch
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GdtrProfile equ LockLocation + 10h
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IdtrProfile equ LockLocation + 16h
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BufferStart equ LockLocation + 1Ch
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;-------------------------------------------------------------------------------------
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;RendezvousFunnelProc procedure follows. All APs execute their procedure. This
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;procedure serializes all the AP processors through an Init sequence. It must be
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;noted that APs arrive here very raw...ie: real mode, no stack.
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;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC
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;IS IN MACHINE CODE.
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;-------------------------------------------------------------------------------------
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;RendezvousFunnelProc (&WakeUpBuffer,MemAddress);
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RendezvousFunnelProc PROC near C PUBLIC
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RendezvousFunnelProcStart::
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; At this point CS = 0x(vv00) and ip= 0x0.
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db 8ch, 0c8h ; mov ax, cs
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db 8eh, 0d8h ; mov ds, ax
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db 8eh, 0c0h ; mov es, ax
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db 8eh, 0d0h ; mov ss, ax
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db 33h, 0c0h ; xor ax, ax
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db 8eh, 0e0h ; mov fs, ax
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db 8eh, 0e8h ; mov gs, ax
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flat32Start::
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db 0BEh
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dw BufferStart ; mov si, BufferStart
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db 66h, 8Bh, 14h ; mov edx,dword ptr [si] ; EDX is keeping the start address of wakeup buffer
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db 0BEh
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dw GdtrProfile ; mov si, GdtrProfile
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db 66h ; db 66h
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db 2Eh, 0Fh, 01h, 14h ; lgdt fword ptr cs:[si]
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db 0BEh
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dw IdtrProfile ; mov si, IdtrProfile
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db 66h ; db 66h
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db 2Eh, 0Fh, 01h, 1Ch ; lidt fword ptr cs:[si]
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db 33h, 0C0h ; xor ax, ax
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db 8Eh, 0D8h ; mov ds, ax
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db 0Fh, 20h, 0C0h ; mov eax, cr0 ; Get control register 0
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db 66h, 83h, 0C8h, 01h ; or eax, 000000001h ; Set PE bit (bit #0)
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db 0Fh, 22h, 0C0h ; mov cr0, eax
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FLAT32_JUMP::
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db 66h, 67h, 0EAh ; far jump
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dd 0h ; 32-bit offset
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dw 20h ; 16-bit selector
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PMODE_ENTRY:: ; protected mode entry point
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mov ax, 8h
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax
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mov ss, ax ; Flat mode setup.
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mov esi, edx
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mov edi, esi
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add edi, LockLocation
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mov al, NotVacantFlag
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TestLock::
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xchg byte ptr [edi], al
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cmp al, NotVacantFlag
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jz TestLock
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ProgramStack::
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mov edi, esi
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add edi, StackSize
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mov eax, dword ptr [edi]
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mov edi, esi
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add edi, StackStart
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add eax, dword ptr [edi]
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mov esp, eax
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mov dword ptr [edi], eax
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Releaselock::
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mov al, VacantFlag
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mov edi, esi
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add edi, LockLocation
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xchg byte ptr [edi], al
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;
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; Call assembly function to initialize FPU.
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;
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mov ebx, InitializeFloatingPointUnits
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call ebx
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;
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; Call C Function
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;
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mov edi, esi
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add edi, RendezvousProc
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mov eax, dword ptr [edi]
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test eax, eax
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jz GoToSleep
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call eax ; Call C function
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GoToSleep::
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cli
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hlt
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jmp $-2
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RendezvousFunnelProc ENDP
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RendezvousFunnelProcEnd::
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;-------------------------------------------------------------------------------------
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; AsmGetAddressMap (&AddressMap);
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;-------------------------------------------------------------------------------------
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AsmGetAddressMap PROC near C PUBLIC
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pushad
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mov ebp,esp
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mov ebx, dword ptr [ebp+24h]
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mov dword ptr [ebx], RendezvousFunnelProcStart
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mov dword ptr [ebx+4h], PMODE_ENTRY - RendezvousFunnelProcStart
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mov dword ptr [ebx+8h], FLAT32_JUMP - RendezvousFunnelProcStart
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mov dword ptr [ebx+0ch], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
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popad
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ret
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AsmGetAddressMap ENDP
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END
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@@ -1,215 +0,0 @@
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#------------------------------------------------------------------------------
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#
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# Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php.
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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# Module Name:
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#
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# SmiEntry.S
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#
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# Abstract:
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#
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# Code template of the SMI handler for a particular processor
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#
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(gcSmiHandlerTemplate)
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ASM_GLOBAL ASM_PFX(gcSmiHandlerSize)
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ASM_GLOBAL ASM_PFX(gSmiCr3)
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ASM_GLOBAL ASM_PFX(gSmiStack)
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ASM_GLOBAL ASM_PFX(gSmbase)
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ASM_GLOBAL ASM_PFX(mXdSupported)
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ASM_GLOBAL ASM_PFX(FeaturePcdGet (PcdCpuSmmStackGuard))
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ASM_GLOBAL ASM_PFX(gSmiHandlerIdtr)
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.equ MSR_IA32_MISC_ENABLE, 0x1A0
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.equ MSR_EFER, 0xc0000080
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.equ MSR_EFER_XD, 0x800
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#
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# Constants relating to PROCESSOR_SMM_DESCRIPTOR
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#
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.equ DSC_OFFSET, 0xfb00
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.equ DSC_GDTPTR, 0x30
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.equ DSC_GDTSIZ, 0x38
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.equ DSC_CS, 14
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.equ DSC_DS, 16
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.equ DSC_SS, 18
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.equ DSC_OTHERSEG, 20
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.equ PROTECT_MODE_CS, 0x08
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.equ PROTECT_MODE_DS, 0x20
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.equ TSS_SEGMENT, 0x40
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.text
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ASM_PFX(gcSmiHandlerTemplate):
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_SmiEntryPoint:
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.byte 0xbb # mov bx, imm16
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.word _GdtDesc - _SmiEntryPoint + 0x8000
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.byte 0x2e,0xa1 # mov ax, cs:[offset16]
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.word DSC_OFFSET + DSC_GDTSIZ
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decl %eax
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movl %eax, %cs:(%edi) # mov cs:[bx], ax
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.byte 0x66,0x2e,0xa1 # mov eax, cs:[offset16]
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.word DSC_OFFSET + DSC_GDTPTR
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movw %ax, %cs:2(%edi)
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movw %ax, %bp # ebp = GDT base
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.byte 0x66
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lgdt %cs:(%edi)
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# Patch ProtectedMode Segment
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.byte 0xb8 # mov ax, imm16
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.word PROTECT_MODE_CS # set AX for segment directly
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movl %eax, %cs:-2(%edi) # mov cs:[bx - 2], ax
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# Patch ProtectedMode entry
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.byte 0x66, 0xbf # mov edi, SMBASE
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ASM_PFX(gSmbase): .space 4
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.byte 0x67
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lea ((Start32bit - _SmiEntryPoint) + 0x8000)(%edi), %ax
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movw %ax, %cs:-6(%edi)
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movl %cr0, %ebx
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.byte 0x66
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andl $0x9ffafff3, %ebx
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.byte 0x66
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orl $0x23, %ebx
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movl %ebx, %cr0
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.byte 0x66,0xea
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.space 4
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.space 2
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_GdtDesc: .space 4
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.space 2
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Start32bit:
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movw $PROTECT_MODE_DS, %ax
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movl %eax,%ds
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movl %eax,%es
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movl %eax,%fs
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movl %eax,%gs
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movl %eax,%ss
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.byte 0xbc # mov esp, imm32
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ASM_PFX(gSmiStack): .space 4
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movl $ASM_PFX(gSmiHandlerIdtr), %eax
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lidt (%eax)
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jmp ProtFlatMode
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ProtFlatMode:
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.byte 0xb8 # mov eax, imm32
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ASM_PFX(gSmiCr3): .space 4
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movl %eax, %cr3
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#
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# Need to test for CR4 specific bit support
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#
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movl $1, %eax
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cpuid # use CPUID to determine if specific CR4 bits are supported
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xorl %eax, %eax # Clear EAX
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testl $BIT2, %edx # Check for DE capabilities
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jz L8
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orl $BIT3, %eax
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L8:
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testl $BIT6, %edx # Check for PAE capabilities
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jz L9
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orl $BIT5, %eax
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L9:
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testl $BIT7, %edx # Check for MCE capabilities
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jz L10
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orl $BIT6, %eax
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L10:
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testl $BIT24, %edx # Check for FXSR capabilities
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jz L11
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orl $BIT9, %eax
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L11:
|
||||
testl $BIT25, %edx # Check for SSE capabilities
|
||||
jz L12
|
||||
orl $BIT10, %eax
|
||||
L12: # as cr4.PGE is not set here, refresh cr3
|
||||
movl %eax, %cr4 # in PreModifyMtrrs() to flush TLB.
|
||||
|
||||
cmpb $0, ASM_PFX(FeaturePcdGet (PcdCpuSmmStackGuard))
|
||||
jz L5
|
||||
# Load TSS
|
||||
movb $0x89, (TSS_SEGMENT + 5)(%ebp) # clear busy flag
|
||||
movl $TSS_SEGMENT, %eax
|
||||
ltrw %ax
|
||||
L5:
|
||||
|
||||
# enable NXE if supported
|
||||
.byte 0xb0 # mov al, imm8
|
||||
ASM_PFX(mXdSupported): .byte 1
|
||||
cmpb $0, %al
|
||||
jz SkipNxe
|
||||
#
|
||||
# Check XD disable bit
|
||||
#
|
||||
movl $MSR_IA32_MISC_ENABLE, %ecx
|
||||
rdmsr
|
||||
pushl %edx # save MSR_IA32_MISC_ENABLE[63-32]
|
||||
testl $BIT2, %edx # MSR_IA32_MISC_ENABLE[34]
|
||||
jz L13
|
||||
andw $0x0FFFB, %dx # clear XD Disable bit if it is set
|
||||
wrmsr
|
||||
L13:
|
||||
movl $MSR_EFER, %ecx
|
||||
rdmsr
|
||||
orw $MSR_EFER_XD,%ax # enable NXE
|
||||
wrmsr
|
||||
jmp NxeDone
|
||||
SkipNxe:
|
||||
subl $4, %esp
|
||||
NxeDone:
|
||||
|
||||
movl %cr0, %ebx
|
||||
orl $0x080010023, %ebx # enable paging + WP + NE + MP + PE
|
||||
movl %ebx, %cr0
|
||||
leal DSC_OFFSET(%edi),%ebx
|
||||
movw DSC_DS(%ebx),%ax
|
||||
movl %eax, %ds
|
||||
movw DSC_OTHERSEG(%ebx),%ax
|
||||
movl %eax, %es
|
||||
movl %eax, %fs
|
||||
movl %eax, %gs
|
||||
movw DSC_SS(%ebx),%ax
|
||||
movl %eax, %ss
|
||||
|
||||
# jmp _SmiHandler # instruction is not needed
|
||||
|
||||
_SmiHandler:
|
||||
movl 4(%esp), %ebx
|
||||
|
||||
pushl %ebx
|
||||
movl $ASM_PFX(CpuSmmDebugEntry), %eax
|
||||
call *%eax
|
||||
addl $4, %esp
|
||||
|
||||
pushl %ebx
|
||||
movl $ASM_PFX(SmiRendezvous), %eax
|
||||
call *%eax
|
||||
addl $4, %esp
|
||||
|
||||
pushl %ebx
|
||||
movl $ASM_PFX(CpuSmmDebugExit), %eax
|
||||
call *%eax
|
||||
addl $4, %esp
|
||||
|
||||
movl $ASM_PFX(mXdSupported), %eax
|
||||
movb (%eax), %al
|
||||
cmpb $0, %al
|
||||
jz L16
|
||||
popl %edx # get saved MSR_IA32_MISC_ENABLE[63-32]
|
||||
testl $BIT2, %edx
|
||||
jz L16
|
||||
movl $MSR_IA32_MISC_ENABLE, %ecx
|
||||
rdmsr
|
||||
orw $BIT2, %dx # set XD Disable bit if it was set before entering into SMM
|
||||
wrmsr
|
||||
|
||||
L16:
|
||||
rsm
|
||||
|
||||
ASM_PFX(gcSmiHandlerSize): .word . - _SmiEntryPoint
|
||||
@@ -1,223 +0,0 @@
|
||||
;------------------------------------------------------------------------------ ;
|
||||
; Copyright (c) 2009 - 2016, 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:
|
||||
;
|
||||
; SmiEntry.asm
|
||||
;
|
||||
; Abstract:
|
||||
;
|
||||
; Code template of the SMI handler for a particular processor
|
||||
;
|
||||
;-------------------------------------------------------------------------------
|
||||
|
||||
.686p
|
||||
.model flat,C
|
||||
.xmm
|
||||
|
||||
MSR_IA32_MISC_ENABLE EQU 1A0h
|
||||
MSR_EFER EQU 0c0000080h
|
||||
MSR_EFER_XD EQU 0800h
|
||||
|
||||
;
|
||||
; Constants relating to PROCESSOR_SMM_DESCRIPTOR
|
||||
;
|
||||
DSC_OFFSET EQU 0fb00h
|
||||
DSC_GDTPTR EQU 30h
|
||||
DSC_GDTSIZ EQU 38h
|
||||
DSC_CS EQU 14
|
||||
DSC_DS EQU 16
|
||||
DSC_SS EQU 18
|
||||
DSC_OTHERSEG EQU 20
|
||||
|
||||
PROTECT_MODE_CS EQU 08h
|
||||
PROTECT_MODE_DS EQU 20h
|
||||
TSS_SEGMENT EQU 40h
|
||||
|
||||
SmiRendezvous PROTO C
|
||||
CpuSmmDebugEntry PROTO C
|
||||
CpuSmmDebugExit PROTO C
|
||||
|
||||
EXTERNDEF gcSmiHandlerTemplate:BYTE
|
||||
EXTERNDEF gcSmiHandlerSize:WORD
|
||||
EXTERNDEF gSmiCr3:DWORD
|
||||
EXTERNDEF gSmiStack:DWORD
|
||||
EXTERNDEF gSmbase:DWORD
|
||||
EXTERNDEF mXdSupported:BYTE
|
||||
EXTERNDEF FeaturePcdGet (PcdCpuSmmStackGuard):BYTE
|
||||
EXTERNDEF gSmiHandlerIdtr:FWORD
|
||||
|
||||
.code
|
||||
|
||||
gcSmiHandlerTemplate LABEL BYTE
|
||||
|
||||
_SmiEntryPoint:
|
||||
DB 0bbh ; mov bx, imm16
|
||||
DW offset _GdtDesc - _SmiEntryPoint + 8000h
|
||||
DB 2eh, 0a1h ; mov ax, cs:[offset16]
|
||||
DW DSC_OFFSET + DSC_GDTSIZ
|
||||
dec eax
|
||||
mov cs:[edi], eax ; mov cs:[bx], ax
|
||||
DB 66h, 2eh, 0a1h ; mov eax, cs:[offset16]
|
||||
DW DSC_OFFSET + DSC_GDTPTR
|
||||
mov cs:[edi + 2], ax ; mov cs:[bx + 2], eax
|
||||
mov bp, ax ; ebp = GDT base
|
||||
DB 66h
|
||||
lgdt fword ptr cs:[edi] ; lgdt fword ptr cs:[bx]
|
||||
; Patch ProtectedMode Segment
|
||||
DB 0b8h ; mov ax, imm16
|
||||
DW PROTECT_MODE_CS ; set AX for segment directly
|
||||
mov cs:[edi - 2], eax ; mov cs:[bx - 2], ax
|
||||
; Patch ProtectedMode entry
|
||||
DB 66h, 0bfh ; mov edi, SMBASE
|
||||
gSmbase DD ?
|
||||
DB 67h
|
||||
lea ax, [edi + (@32bit - _SmiEntryPoint) + 8000h]
|
||||
mov cs:[edi - 6], ax ; mov cs:[bx - 6], eax
|
||||
mov ebx, cr0
|
||||
DB 66h
|
||||
and ebx, 9ffafff3h
|
||||
DB 66h
|
||||
or ebx, 23h
|
||||
mov cr0, ebx
|
||||
DB 66h, 0eah
|
||||
DD ?
|
||||
DW ?
|
||||
_GdtDesc FWORD ?
|
||||
|
||||
@32bit:
|
||||
mov ax, PROTECT_MODE_DS
|
||||
mov ds, ax
|
||||
mov es, ax
|
||||
mov fs, ax
|
||||
mov gs, ax
|
||||
mov ss, ax
|
||||
DB 0bch ; mov esp, imm32
|
||||
gSmiStack DD ?
|
||||
mov eax, offset gSmiHandlerIdtr
|
||||
lidt fword ptr [eax]
|
||||
jmp ProtFlatMode
|
||||
|
||||
ProtFlatMode:
|
||||
DB 0b8h ; mov eax, imm32
|
||||
gSmiCr3 DD ?
|
||||
mov cr3, eax
|
||||
;
|
||||
; Need to test for CR4 specific bit support
|
||||
;
|
||||
mov eax, 1
|
||||
cpuid ; use CPUID to determine if specific CR4 bits are supported
|
||||
xor eax, eax ; Clear EAX
|
||||
test edx, BIT2 ; Check for DE capabilities
|
||||
jz @f
|
||||
or eax, BIT3
|
||||
@@:
|
||||
test edx, BIT6 ; Check for PAE capabilities
|
||||
jz @f
|
||||
or eax, BIT5
|
||||
@@:
|
||||
test edx, BIT7 ; Check for MCE capabilities
|
||||
jz @f
|
||||
or eax, BIT6
|
||||
@@:
|
||||
test edx, BIT24 ; Check for FXSR capabilities
|
||||
jz @f
|
||||
or eax, BIT9
|
||||
@@:
|
||||
test edx, BIT25 ; Check for SSE capabilities
|
||||
jz @f
|
||||
or eax, BIT10
|
||||
@@: ; as cr4.PGE is not set here, refresh cr3
|
||||
mov cr4, eax ; in PreModifyMtrrs() to flush TLB.
|
||||
|
||||
cmp FeaturePcdGet (PcdCpuSmmStackGuard), 0
|
||||
jz @F
|
||||
; Load TSS
|
||||
mov byte ptr [ebp + TSS_SEGMENT + 5], 89h ; clear busy flag
|
||||
mov eax, TSS_SEGMENT
|
||||
ltr ax
|
||||
@@:
|
||||
|
||||
; enable NXE if supported
|
||||
DB 0b0h ; mov al, imm8
|
||||
mXdSupported DB 1
|
||||
cmp al, 0
|
||||
jz @SkipXd
|
||||
;
|
||||
; Check XD disable bit
|
||||
;
|
||||
mov ecx, MSR_IA32_MISC_ENABLE
|
||||
rdmsr
|
||||
push edx ; save MSR_IA32_MISC_ENABLE[63-32]
|
||||
test edx, BIT2 ; MSR_IA32_MISC_ENABLE[34]
|
||||
jz @f
|
||||
and dx, 0FFFBh ; clear XD Disable bit if it is set
|
||||
wrmsr
|
||||
@@:
|
||||
mov ecx, MSR_EFER
|
||||
rdmsr
|
||||
or ax, MSR_EFER_XD ; enable NXE
|
||||
wrmsr
|
||||
jmp @XdDone
|
||||
@SkipXd:
|
||||
sub esp, 4
|
||||
@XdDone:
|
||||
|
||||
mov ebx, cr0
|
||||
or ebx, 080010023h ; enable paging + WP + NE + MP + PE
|
||||
mov cr0, ebx
|
||||
lea ebx, [edi + DSC_OFFSET]
|
||||
mov ax, [ebx + DSC_DS]
|
||||
mov ds, eax
|
||||
mov ax, [ebx + DSC_OTHERSEG]
|
||||
mov es, eax
|
||||
mov fs, eax
|
||||
mov gs, eax
|
||||
mov ax, [ebx + DSC_SS]
|
||||
mov ss, eax
|
||||
|
||||
; jmp _SmiHandler ; instruction is not needed
|
||||
|
||||
_SmiHandler PROC
|
||||
mov ebx, [esp + 4] ; CPU Index
|
||||
push ebx
|
||||
mov eax, CpuSmmDebugEntry
|
||||
call eax
|
||||
add esp, 4
|
||||
|
||||
push ebx
|
||||
mov eax, SmiRendezvous
|
||||
call eax
|
||||
add esp, 4
|
||||
|
||||
push ebx
|
||||
mov eax, CpuSmmDebugExit
|
||||
call eax
|
||||
add esp, 4
|
||||
|
||||
mov eax, offset mXdSupported
|
||||
mov al, [eax]
|
||||
cmp al, 0
|
||||
jz @f
|
||||
pop edx ; get saved MSR_IA32_MISC_ENABLE[63-32]
|
||||
test edx, BIT2
|
||||
jz @f
|
||||
mov ecx, MSR_IA32_MISC_ENABLE
|
||||
rdmsr
|
||||
or dx, BIT2 ; set XD Disable bit if it was set before entering into SMM
|
||||
wrmsr
|
||||
|
||||
@@:
|
||||
rsm
|
||||
_SmiHandler ENDP
|
||||
|
||||
gcSmiHandlerSize DW $ - _SmiEntryPoint
|
||||
|
||||
END
|
||||
@@ -1,696 +0,0 @@
|
||||
#------------------------------------------------------------------------------
|
||||
#
|
||||
# Copyright (c) 2009 - 2016, 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:
|
||||
#
|
||||
# SmiException.S
|
||||
#
|
||||
# Abstract:
|
||||
#
|
||||
# Exception handlers used in SM mode
|
||||
#
|
||||
#------------------------------------------------------------------------------
|
||||
|
||||
ASM_GLOBAL ASM_PFX(SmiPFHandler)
|
||||
ASM_GLOBAL ASM_PFX(PageFaultStubFunction)
|
||||
ASM_GLOBAL ASM_PFX(gcSmiIdtr)
|
||||
ASM_GLOBAL ASM_PFX(gcSmiGdtr)
|
||||
ASM_GLOBAL ASM_PFX(gTaskGateDescriptor)
|
||||
ASM_GLOBAL ASM_PFX(gcPsd)
|
||||
ASM_GLOBAL ASM_PFX(FeaturePcdGet (PcdCpuSmmProfileEnable))
|
||||
|
||||
.data
|
||||
|
||||
NullSeg: .quad 0 # reserved by architecture
|
||||
CodeSeg32:
|
||||
.word -1 # LimitLow
|
||||
.word 0 # BaseLow
|
||||
.byte 0 # BaseMid
|
||||
.byte 0x9b
|
||||
.byte 0xcf # LimitHigh
|
||||
.byte 0 # BaseHigh
|
||||
ProtModeCodeSeg32:
|
||||
.word -1 # LimitLow
|
||||
.word 0 # BaseLow
|
||||
.byte 0 # BaseMid
|
||||
.byte 0x9b
|
||||
.byte 0xcf # LimitHigh
|
||||
.byte 0 # BaseHigh
|
||||
ProtModeSsSeg32:
|
||||
.word -1 # LimitLow
|
||||
.word 0 # BaseLow
|
||||
.byte 0 # BaseMid
|
||||
.byte 0x93
|
||||
.byte 0xcf # LimitHigh
|
||||
.byte 0 # BaseHigh
|
||||
DataSeg32:
|
||||
.word -1 # LimitLow
|
||||
.word 0 # BaseLow
|
||||
.byte 0 # BaseMid
|
||||
.byte 0x93
|
||||
.byte 0xcf # LimitHigh
|
||||
.byte 0 # BaseHigh
|
||||
CodeSeg16:
|
||||
.word -1
|
||||
.word 0
|
||||
.byte 0
|
||||
.byte 0x9b
|
||||
.byte 0x8f
|
||||
.byte 0
|
||||
DataSeg16:
|
||||
.word -1
|
||||
.word 0
|
||||
.byte 0
|
||||
.byte 0x93
|
||||
.byte 0x8f
|
||||
.byte 0
|
||||
CodeSeg64:
|
||||
.word -1 # LimitLow
|
||||
.word 0 # BaseLow
|
||||
.byte 0 # BaseMid
|
||||
.byte 0x9b
|
||||
.byte 0xaf # LimitHigh
|
||||
.byte 0 # BaseHigh
|
||||
.equ GDT_SIZE, .- NullSeg
|
||||
|
||||
TssSeg:
|
||||
.word TSS_DESC_SIZE -1 # LimitLow
|
||||
.word 0 # BaseLow
|
||||
.byte 0 # BaseMid
|
||||
.byte 0x89
|
||||
.byte 0x00 # LimitHigh
|
||||
.byte 0 # BaseHigh
|
||||
ExceptionTssSeg:
|
||||
.word TSS_DESC_SIZE - 1 # LimitLow
|
||||
.word 0 # BaseLow
|
||||
.byte 0 # BaseMid
|
||||
.byte 0x89
|
||||
.byte 0x00 # LimitHigh
|
||||
.byte 0 # BaseHigh
|
||||
|
||||
.equ CODE_SEL, CodeSeg32 - NullSeg
|
||||
.equ DATA_SEL, DataSeg32 - NullSeg
|
||||
.equ TSS_SEL, TssSeg - NullSeg
|
||||
.equ EXCEPTION_TSS_SEL, ExceptionTssSeg - NullSeg
|
||||
|
||||
# IA32 TSS fields
|
||||
.equ TSS_ESP0, 4
|
||||
.equ TSS_SS0, 8
|
||||
.equ TSS_ESP1, 12
|
||||
.equ TSS_SS1, 16
|
||||
.equ TSS_ESP2, 20
|
||||
.equ TSS_SS2, 24
|
||||
.equ TSS_CR3, 28
|
||||
.equ TSS_EIP, 32
|
||||
.equ TSS_EFLAGS, 36
|
||||
.equ TSS_EAX, 40
|
||||
.equ TSS_ECX, 44
|
||||
.equ TSS_EDX, 48
|
||||
.equ TSS_EBX, 52
|
||||
.equ TSS_ESP, 56
|
||||
.equ TSS_EBP, 60
|
||||
.equ TSS_ESI, 64
|
||||
.equ TSS_EDI, 68
|
||||
.equ TSS_ES, 72
|
||||
.equ TSS_CS, 76
|
||||
.equ TSS_SS, 80
|
||||
.equ TSS_DS, 84
|
||||
.equ TSS_FS, 88
|
||||
.equ TSS_GS, 92
|
||||
.equ TSS_LDT, 96
|
||||
|
||||
# Create 2 TSS segments just after GDT
|
||||
TssDescriptor:
|
||||
.word 0 # PreviousTaskLink
|
||||
.word 0 # Reserved
|
||||
.long 0 # ESP0
|
||||
.word 0 # SS0
|
||||
.word 0 # Reserved
|
||||
.long 0 # ESP1
|
||||
.word 0 # SS1
|
||||
.word 0 # Reserved
|
||||
.long 0 # ESP2
|
||||
.word 0 # SS2
|
||||
.word 0 # Reserved
|
||||
.long 0 # CR3
|
||||
.long 0 # EIP
|
||||
.long 0 # EFLAGS
|
||||
.long 0 # EAX
|
||||
.long 0 # ECX
|
||||
.long 0 # EDX
|
||||
.long 0 # EBX
|
||||
.long 0 # ESP
|
||||
.long 0 # EBP
|
||||
.long 0 # ESI
|
||||
.long 0 # EDI
|
||||
.word 0 # ES
|
||||
.word 0 # Reserved
|
||||
.word 0 # CS
|
||||
.word 0 # Reserved
|
||||
.word 0 # SS
|
||||
.word 0 # Reserved
|
||||
.word 0 # DS
|
||||
.word 0 # Reserved
|
||||
.word 0 # FS
|
||||
.word 0 # Reserved
|
||||
.word 0 # GS
|
||||
.word 0 # Reserved
|
||||
.word 0 # LDT Selector
|
||||
.word 0 # Reserved
|
||||
.word 0 # T
|
||||
.word 0 # I/O Map Base
|
||||
.equ TSS_DESC_SIZE, . - TssDescriptor
|
||||
|
||||
ExceptionTssDescriptor:
|
||||
.word 0 # PreviousTaskLink
|
||||
.word 0 # Reserved
|
||||
.long 0 # ESP0
|
||||
.word 0 # SS0
|
||||
.word 0 # Reserved
|
||||
.long 0 # ESP1
|
||||
.word 0 # SS1
|
||||
.word 0 # Reserved
|
||||
.long 0 # ESP2
|
||||
.word 0 # SS2
|
||||
.word 0 # Reserved
|
||||
.long 0 # CR3
|
||||
.long PFHandlerEntry # EIP
|
||||
.long 00000002 # EFLAGS
|
||||
.long 0 # EAX
|
||||
.long 0 # ECX
|
||||
.long 0 # EDX
|
||||
.long 0 # EBX
|
||||
.long 0 # ESP
|
||||
.long 0 # EBP
|
||||
.long 0 # ESI
|
||||
.long 0 # EDI
|
||||
.word DATA_SEL # ES
|
||||
.word 0 # Reserved
|
||||
.word CODE_SEL # CS
|
||||
.word 0 # Reserved
|
||||
.word DATA_SEL # SS
|
||||
.word 0 # Reserved
|
||||
.word DATA_SEL # DS
|
||||
.word 0 # Reserved
|
||||
.word DATA_SEL # FS
|
||||
.word 0 # Reserved
|
||||
.word DATA_SEL # GS
|
||||
.word 0 # Reserved
|
||||
.word 0 # LDT Selector
|
||||
.word 0 # Reserved
|
||||
.word 0 # T
|
||||
.word 0 # I/O Map Base
|
||||
|
||||
ASM_PFX(gcPsd):
|
||||
.ascii "PSDSIG "
|
||||
.word PSD_SIZE
|
||||
.word 2
|
||||
.word 1 << 2
|
||||
.word CODE_SEL
|
||||
.word DATA_SEL
|
||||
.word DATA_SEL
|
||||
.word DATA_SEL
|
||||
.word 0
|
||||
.long 0
|
||||
.long 0
|
||||
.long 0
|
||||
.long 0
|
||||
.quad 0
|
||||
.long NullSeg
|
||||
.long 0
|
||||
.long GDT_SIZE
|
||||
.long 0
|
||||
.space 24, 0
|
||||
.long 0
|
||||
.long 0
|
||||
.equ PSD_SIZE, . - ASM_PFX(gcPsd)
|
||||
|
||||
ASM_PFX(gcSmiGdtr): .word GDT_SIZE - 1
|
||||
.long NullSeg
|
||||
|
||||
ASM_PFX(gcSmiIdtr): .word 0
|
||||
.long 0
|
||||
|
||||
ASM_PFX(gTaskGateDescriptor):
|
||||
.word 0 # Reserved
|
||||
.word EXCEPTION_TSS_SEL # TSS Segment selector
|
||||
.byte 0 # Reserved
|
||||
.byte 0x85 # Task Gate, present, DPL = 0
|
||||
.word 0 # Reserved
|
||||
|
||||
.text
|
||||
|
||||
#------------------------------------------------------------------------------
|
||||
# PageFaultIdtHandlerSmmProfile is the entry point for all exceptions
|
||||
#
|
||||
# Stack:
|
||||
#+---------------------+
|
||||
#+ EFlags +
|
||||
#+---------------------+
|
||||
#+ CS +
|
||||
#+---------------------+
|
||||
#+ EIP +
|
||||
#+---------------------+
|
||||
#+ Error Code +
|
||||
#+---------------------+
|
||||
#+ Vector Number +
|
||||
#+---------------------+
|
||||
#+ EBP +
|
||||
#+---------------------+ <-- EBP
|
||||
#
|
||||
# RSP set to odd multiple of 8 means ErrCode PRESENT
|
||||
#------------------------------------------------------------------------------
|
||||
ASM_GLOBAL ASM_PFX(PageFaultIdtHandlerSmmProfile)
|
||||
ASM_PFX(PageFaultIdtHandlerSmmProfile):
|
||||
pushl $0x0e # Page Fault
|
||||
pushl %ebp
|
||||
movl %esp, %ebp
|
||||
|
||||
|
||||
#
|
||||
# Align stack to make sure that EFI_FX_SAVE_STATE_IA32 of EFI_SYSTEM_CONTEXT_IA32
|
||||
# is 16-byte aligned
|
||||
#
|
||||
andl $0xfffffff0, %esp
|
||||
subl $12, %esp
|
||||
|
||||
## UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
|
||||
pushl %eax
|
||||
pushl %ecx
|
||||
pushl %edx
|
||||
pushl %ebx
|
||||
leal (6*4)(%ebp), %ecx
|
||||
pushl %ecx # ESP
|
||||
pushl (%ebp) # EBP
|
||||
pushl %esi
|
||||
pushl %edi
|
||||
|
||||
## UINT32 Gs, Fs, Es, Ds, Cs, Ss;
|
||||
movl %ss, %eax
|
||||
pushl %eax
|
||||
movzwl (4*4)(%ebp), %eax
|
||||
pushl %eax
|
||||
movl %ds, %eax
|
||||
pushl %eax
|
||||
movl %es, %eax
|
||||
pushl %eax
|
||||
movl %fs, %eax
|
||||
pushl %eax
|
||||
movl %gs, %eax
|
||||
pushl %eax
|
||||
|
||||
## UINT32 Eip;
|
||||
movl (3*4)(%ebp), %eax
|
||||
pushl %eax
|
||||
|
||||
## UINT32 Gdtr[2], Idtr[2];
|
||||
subl $8, %esp
|
||||
sidt (%esp)
|
||||
movl 2(%esp), %eax
|
||||
xchgl (%esp), %eax
|
||||
andl $0xffff, %eax
|
||||
movl %eax, 4(%esp)
|
||||
|
||||
subl $8, %esp
|
||||
sgdt (%esp)
|
||||
movl 2(%esp), %eax
|
||||
xchgl (%esp), %eax
|
||||
andl $0xffff, %eax
|
||||
movl %eax, 4(%esp)
|
||||
|
||||
## UINT32 Ldtr, Tr;
|
||||
xorl %eax, %eax
|
||||
strw %ax
|
||||
pushl %eax
|
||||
sldtw %ax
|
||||
pushl %eax
|
||||
|
||||
## UINT32 EFlags;
|
||||
movl (5*4)(%ebp), %eax
|
||||
pushl %eax
|
||||
|
||||
## UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
|
||||
movl %cr4, %eax
|
||||
orl $0x208, %eax
|
||||
movl %eax, %cr4
|
||||
pushl %eax
|
||||
movl %cr3, %eax
|
||||
pushl %eax
|
||||
movl %cr2, %eax
|
||||
pushl %eax
|
||||
xorl %eax, %eax
|
||||
pushl %eax
|
||||
movl %cr0, %eax
|
||||
pushl %eax
|
||||
|
||||
## UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
||||
movl %dr7, %eax
|
||||
pushl %eax
|
||||
movl %dr6, %eax
|
||||
pushl %eax
|
||||
movl %dr3, %eax
|
||||
pushl %eax
|
||||
movl %dr2, %eax
|
||||
pushl %eax
|
||||
movl %dr1, %eax
|
||||
pushl %eax
|
||||
movl %dr0, %eax
|
||||
pushl %eax
|
||||
|
||||
## FX_SAVE_STATE_IA32 FxSaveState;
|
||||
subl $512, %esp
|
||||
movl %esp, %edi
|
||||
.byte 0x0f, 0xae, 0x07 #fxsave [edi]
|
||||
|
||||
# UEFI calling convention for IA32 requires that Direction flag in EFLAGs is clear
|
||||
cld
|
||||
|
||||
## UINT32 ExceptionData;
|
||||
pushl (2*4)(%ebp)
|
||||
|
||||
## call into exception handler
|
||||
|
||||
## Prepare parameter and call
|
||||
movl %esp, %edx
|
||||
pushl %edx
|
||||
movl (1*4)(%ebp), %edx
|
||||
pushl %edx
|
||||
|
||||
#
|
||||
# Call External Exception Handler
|
||||
#
|
||||
movl $ASM_PFX(SmiPFHandler), %eax
|
||||
call *%eax
|
||||
addl $8, %esp
|
||||
jmp L4
|
||||
|
||||
L4:
|
||||
## UINT32 ExceptionData;
|
||||
addl $4, %esp
|
||||
|
||||
## FX_SAVE_STATE_IA32 FxSaveState;
|
||||
movl %esp, %esi
|
||||
.byte 0xf, 0xae, 0xe # fxrstor [esi]
|
||||
addl $512, %esp
|
||||
|
||||
## UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
||||
## Skip restoration of DRx registers to support debuggers
|
||||
## that set breakpoints in interrupt/exception context
|
||||
addl $4*6, %esp
|
||||
|
||||
## UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
|
||||
popl %eax
|
||||
movl %eax, %cr0
|
||||
addl $4, %esp # not for Cr1
|
||||
popl %eax
|
||||
movl %eax, %cr2
|
||||
popl %eax
|
||||
movl %eax, %cr3
|
||||
popl %eax
|
||||
movl %eax, %cr4
|
||||
|
||||
## UINT32 EFlags;
|
||||
popl (5*4)(%ebp)
|
||||
|
||||
## UINT32 Ldtr, Tr;
|
||||
## UINT32 Gdtr[2], Idtr[2];
|
||||
## Best not let anyone mess with these particular registers...
|
||||
addl $24, %esp
|
||||
|
||||
## UINT32 Eip;
|
||||
popl (3*4)(%ebp)
|
||||
|
||||
## UINT32 Gs, Fs, Es, Ds, Cs, Ss;
|
||||
## NOTE - modified segment registers could hang the debugger... We
|
||||
## could attempt to insulate ourselves against this possibility,
|
||||
## but that poses risks as well.
|
||||
##
|
||||
popl %gs
|
||||
popl %fs
|
||||
popl %es
|
||||
popl %ds
|
||||
popl (4*4)(%ebp)
|
||||
popl %ss
|
||||
|
||||
## UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
|
||||
popl %edi
|
||||
popl %esi
|
||||
addl $4, %esp # not for ebp
|
||||
addl $4, %esp # not for esp
|
||||
popl %ebx
|
||||
popl %edx
|
||||
popl %ecx
|
||||
popl %eax
|
||||
|
||||
movl %ebp, %esp
|
||||
popl %ebp
|
||||
|
||||
# Enable TF bit after page fault handler runs
|
||||
btsl $8, 16(%esp) # EFLAGS
|
||||
|
||||
addl $8, %esp # skip INT# & ErrCode
|
||||
Return:
|
||||
iret
|
||||
#
|
||||
# Page Fault Exception Handler entry when SMM Stack Guard is enabled
|
||||
# Executiot starts here after a task switch
|
||||
#
|
||||
PFHandlerEntry:
|
||||
#
|
||||
# Get this processor's TSS
|
||||
#
|
||||
subl $8, %esp
|
||||
sgdt 2(%esp)
|
||||
movl 4(%esp), %eax # GDT base
|
||||
addl $8, %esp
|
||||
movl (TSS_SEL+2)(%eax), %ecx
|
||||
shll $8, %ecx
|
||||
movb (TSS_SEL+7)(%eax), %cl
|
||||
rorl $8, %ecx # ecx = TSS base
|
||||
|
||||
movl %esp, %ebp
|
||||
|
||||
#
|
||||
# Align stack to make sure that EFI_FX_SAVE_STATE_IA32 of EFI_SYSTEM_CONTEXT_IA32
|
||||
# is 16-byte aligned
|
||||
#
|
||||
andl $0xfffffff0, %esp
|
||||
subl $12, %esp
|
||||
|
||||
## UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
|
||||
pushl TSS_EAX(%ecx)
|
||||
pushl TSS_ECX(%ecx)
|
||||
pushl TSS_EDX(%ecx)
|
||||
pushl TSS_EBX(%ecx)
|
||||
pushl TSS_ESP(%ecx)
|
||||
pushl TSS_EBP(%ecx)
|
||||
pushl TSS_ESI(%ecx)
|
||||
pushl TSS_EDI(%ecx)
|
||||
|
||||
## UINT32 Gs, Fs, Es, Ds, Cs, Ss;
|
||||
movzwl TSS_SS(%ecx), %eax
|
||||
pushl %eax
|
||||
movzwl TSS_CS(%ecx), %eax
|
||||
pushl %eax
|
||||
movzwl TSS_DS(%ecx), %eax
|
||||
pushl %eax
|
||||
movzwl TSS_ES(%ecx), %eax
|
||||
pushl %eax
|
||||
movzwl TSS_FS(%ecx), %eax
|
||||
pushl %eax
|
||||
movzwl TSS_GS(%ecx), %eax
|
||||
pushl %eax
|
||||
|
||||
## UINT32 Eip;
|
||||
pushl TSS_EIP(%ecx)
|
||||
|
||||
## UINT32 Gdtr[2], Idtr[2];
|
||||
subl $8, %esp
|
||||
sidt (%esp)
|
||||
movl 2(%esp), %eax
|
||||
xchgl (%esp), %eax
|
||||
andl $0xFFFF, %eax
|
||||
movl %eax, 4(%esp)
|
||||
|
||||
subl $8, %esp
|
||||
sgdt (%esp)
|
||||
movl 2(%esp), %eax
|
||||
xchgl (%esp), %eax
|
||||
andl $0xFFFF, %eax
|
||||
movl %eax, 4(%esp)
|
||||
|
||||
## UINT32 Ldtr, Tr;
|
||||
movl $TSS_SEL, %eax
|
||||
pushl %eax
|
||||
movzwl TSS_LDT(%ecx), %eax
|
||||
pushl %eax
|
||||
|
||||
## UINT32 EFlags;
|
||||
pushl TSS_EFLAGS(%ecx)
|
||||
|
||||
## UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
|
||||
movl %cr4, %eax
|
||||
orl $0x208, %eax
|
||||
movl %eax, %cr4
|
||||
pushl %eax
|
||||
movl %cr3, %eax
|
||||
pushl %eax
|
||||
movl %cr2, %eax
|
||||
pushl %eax
|
||||
xorl %eax, %eax
|
||||
pushl %eax
|
||||
movl %cr0, %eax
|
||||
pushl %eax
|
||||
|
||||
## UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
||||
movl %dr7, %eax
|
||||
pushl %eax
|
||||
movl %dr6, %eax
|
||||
pushl %eax
|
||||
movl %dr3, %eax
|
||||
pushl %eax
|
||||
movl %dr2, %eax
|
||||
pushl %eax
|
||||
movl %dr1, %eax
|
||||
pushl %eax
|
||||
movl %dr0, %eax
|
||||
pushl %eax
|
||||
|
||||
## FX_SAVE_STATE_IA32 FxSaveState;
|
||||
## Clear TS bit in CR0 to avoid Device Not Available Exception (#NM)
|
||||
## when executing fxsave/fxrstor instruction
|
||||
clts
|
||||
subl $512, %esp
|
||||
movl %esp, %edi
|
||||
.byte 0x0f, 0xae, 0x07 #fxsave [edi]
|
||||
|
||||
# UEFI calling convention for IA32 requires that Direction flag in EFLAGs is clear
|
||||
cld
|
||||
|
||||
## UINT32 ExceptionData;
|
||||
pushl (%ebp)
|
||||
|
||||
## call into exception handler
|
||||
movl %ecx, %ebx
|
||||
movl $ASM_PFX(SmiPFHandler), %eax
|
||||
|
||||
## Prepare parameter and call
|
||||
movl %esp, %edx
|
||||
pushl %edx
|
||||
movl $14, %edx
|
||||
pushl %edx
|
||||
|
||||
#
|
||||
# Call External Exception Handler
|
||||
#
|
||||
call *%eax
|
||||
addl $8, %esp
|
||||
|
||||
movl %ebx, %ecx
|
||||
## UINT32 ExceptionData;
|
||||
addl $4, %esp
|
||||
|
||||
## FX_SAVE_STATE_IA32 FxSaveState;
|
||||
movl %esp, %esi
|
||||
.byte 0xf, 0xae, 0xe # fxrstor [esi]
|
||||
addl $512, %esp
|
||||
|
||||
## UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
||||
## Skip restoration of DRx registers to support debuggers
|
||||
## that set breakpoints in interrupt/exception context
|
||||
addl $4*6, %esp
|
||||
|
||||
## UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
|
||||
popl %eax
|
||||
movl %eax, %cr0
|
||||
addl $4, %esp # not for Cr1
|
||||
popl %eax
|
||||
movl %eax, %cr2
|
||||
popl %eax
|
||||
movl %eax, TSS_CR3(%ecx)
|
||||
popl %eax
|
||||
movl %eax, %cr4
|
||||
|
||||
## UINT32 EFlags;
|
||||
popl TSS_EFLAGS(%ecx)
|
||||
|
||||
## UINT32 Ldtr, Tr;
|
||||
## UINT32 Gdtr[2], Idtr[2];
|
||||
## Best not let anyone mess with these particular registers...
|
||||
addl $24, %esp
|
||||
|
||||
## UINT32 Eip;
|
||||
popl TSS_EIP(%ecx)
|
||||
|
||||
## UINT32 Gs, Fs, Es, Ds, Cs, Ss;
|
||||
## NOTE - modified segment registers could hang the debugger... We
|
||||
## could attempt to insulate ourselves against this possibility,
|
||||
## but that poses risks as well.
|
||||
##
|
||||
popl %eax
|
||||
movw %ax, TSS_GS(%ecx)
|
||||
popl %eax
|
||||
movw %ax, TSS_FS(%ecx)
|
||||
popl %eax
|
||||
movw %ax, TSS_ES(%ecx)
|
||||
popl %eax
|
||||
movw %ax, TSS_DS(%ecx)
|
||||
popl %eax
|
||||
movw %ax, TSS_CS(%ecx)
|
||||
popl %eax
|
||||
movw %ax, TSS_SS(%ecx)
|
||||
|
||||
## UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
|
||||
popl TSS_EDI(%ecx)
|
||||
popl TSS_ESI(%ecx)
|
||||
addl $4, %esp # not for ebp
|
||||
addl $4, %esp # not for esp
|
||||
popl TSS_EBX(%ecx)
|
||||
popl TSS_EDX(%ecx)
|
||||
popl TSS_ECX(%ecx)
|
||||
popl TSS_EAX(%ecx)
|
||||
|
||||
movl %ebp, %esp
|
||||
|
||||
# Set single step DB# if SMM profile is enabled and page fault exception happens
|
||||
cmpb $0, ASM_PFX(FeaturePcdGet (PcdCpuSmmProfileEnable))
|
||||
jz Done2
|
||||
# Create return context for iret in stub function
|
||||
movl TSS_ESP(%ecx), %eax # Get old stack pointer
|
||||
movl TSS_EIP(%ecx), %ebx
|
||||
movl %ebx, -0xc(%eax) # create EIP in old stack
|
||||
movzwl TSS_CS(%ecx), %ebx
|
||||
movl %ebx, -0x8(%eax) # create CS in old stack
|
||||
movl TSS_EFLAGS(%ecx), %ebx
|
||||
btsl $8,%ebx
|
||||
movl %ebx, -0x4(%eax) # create eflags in old stack
|
||||
movl TSS_ESP(%ecx), %eax # Get old stack pointer
|
||||
subl $12, %eax # minus 12 byte
|
||||
movl %eax, TSS_ESP(%ecx) # Set new stack pointer
|
||||
|
||||
# Replace the EIP of interrupted task with stub function
|
||||
movl $ASM_PFX(PageFaultStubFunction), %eax
|
||||
movl %eax, TSS_EIP(%ecx)
|
||||
# Jump to the iret so next page fault handler as a task will start again after iret.
|
||||
|
||||
Done2:
|
||||
|
||||
addl $4, %esp # skip ErrCode
|
||||
|
||||
jmp Return
|
||||
|
||||
ASM_PFX(PageFaultStubFunction):
|
||||
#
|
||||
# we need clean TS bit in CR0 to execute
|
||||
# x87 FPU/MMX/SSE/SSE2/SSE3/SSSE3/SSE4 instructions.
|
||||
#
|
||||
clts
|
||||
iret
|
||||
@@ -1,713 +0,0 @@
|
||||
;------------------------------------------------------------------------------ ;
|
||||
; Copyright (c) 2009 - 2016, 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:
|
||||
;
|
||||
; SmiException.asm
|
||||
;
|
||||
; Abstract:
|
||||
;
|
||||
; Exception handlers used in SM mode
|
||||
;
|
||||
;-------------------------------------------------------------------------------
|
||||
|
||||
.686p
|
||||
.model flat,C
|
||||
|
||||
EXTERNDEF SmiPFHandler:PROC
|
||||
EXTERNDEF PageFaultStubFunction:PROC
|
||||
EXTERNDEF gcSmiIdtr:FWORD
|
||||
EXTERNDEF gcSmiGdtr:FWORD
|
||||
EXTERNDEF gTaskGateDescriptor:QWORD
|
||||
EXTERNDEF gcPsd:BYTE
|
||||
EXTERNDEF FeaturePcdGet (PcdCpuSmmProfileEnable):BYTE
|
||||
|
||||
|
||||
.data
|
||||
|
||||
NullSeg DQ 0 ; reserved by architecture
|
||||
CodeSeg32 LABEL QWORD
|
||||
DW -1 ; LimitLow
|
||||
DW 0 ; BaseLow
|
||||
DB 0 ; BaseMid
|
||||
DB 9bh
|
||||
DB 0cfh ; LimitHigh
|
||||
DB 0 ; BaseHigh
|
||||
ProtModeCodeSeg32 LABEL QWORD
|
||||
DW -1 ; LimitLow
|
||||
DW 0 ; BaseLow
|
||||
DB 0 ; BaseMid
|
||||
DB 9bh
|
||||
DB 0cfh ; LimitHigh
|
||||
DB 0 ; BaseHigh
|
||||
ProtModeSsSeg32 LABEL QWORD
|
||||
DW -1 ; LimitLow
|
||||
DW 0 ; BaseLow
|
||||
DB 0 ; BaseMid
|
||||
DB 93h
|
||||
DB 0cfh ; LimitHigh
|
||||
DB 0 ; BaseHigh
|
||||
DataSeg32 LABEL QWORD
|
||||
DW -1 ; LimitLow
|
||||
DW 0 ; BaseLow
|
||||
DB 0 ; BaseMid
|
||||
DB 93h
|
||||
DB 0cfh ; LimitHigh
|
||||
DB 0 ; BaseHigh
|
||||
CodeSeg16 LABEL QWORD
|
||||
DW -1
|
||||
DW 0
|
||||
DB 0
|
||||
DB 9bh
|
||||
DB 8fh
|
||||
DB 0
|
||||
DataSeg16 LABEL QWORD
|
||||
DW -1
|
||||
DW 0
|
||||
DB 0
|
||||
DB 93h
|
||||
DB 8fh
|
||||
DB 0
|
||||
CodeSeg64 LABEL QWORD
|
||||
DW -1 ; LimitLow
|
||||
DW 0 ; BaseLow
|
||||
DB 0 ; BaseMid
|
||||
DB 9bh
|
||||
DB 0afh ; LimitHigh
|
||||
DB 0 ; BaseHigh
|
||||
GDT_SIZE = $ - offset NullSeg
|
||||
|
||||
TssSeg LABEL QWORD
|
||||
DW TSS_DESC_SIZE - 1 ; LimitLow
|
||||
DW 0 ; BaseLow
|
||||
DB 0 ; BaseMid
|
||||
DB 89h
|
||||
DB 00h ; LimitHigh
|
||||
DB 0 ; BaseHigh
|
||||
ExceptionTssSeg LABEL QWORD
|
||||
DW TSS_DESC_SIZE - 1 ; LimitLow
|
||||
DW 0 ; BaseLow
|
||||
DB 0 ; BaseMid
|
||||
DB 89h
|
||||
DB 00h ; LimitHigh
|
||||
DB 0 ; BaseHigh
|
||||
|
||||
CODE_SEL = offset CodeSeg32 - offset NullSeg
|
||||
DATA_SEL = offset DataSeg32 - offset NullSeg
|
||||
TSS_SEL = offset TssSeg - offset NullSeg
|
||||
EXCEPTION_TSS_SEL = offset ExceptionTssSeg - offset NullSeg
|
||||
|
||||
IA32_TSS STRUC
|
||||
DW ?
|
||||
DW ?
|
||||
ESP0 DD ?
|
||||
SS0 DW ?
|
||||
DW ?
|
||||
ESP1 DD ?
|
||||
SS1 DW ?
|
||||
DW ?
|
||||
ESP2 DD ?
|
||||
SS2 DW ?
|
||||
DW ?
|
||||
_CR3 DD ?
|
||||
EIP DD ?
|
||||
EFLAGS DD ?
|
||||
_EAX DD ?
|
||||
_ECX DD ?
|
||||
_EDX DD ?
|
||||
_EBX DD ?
|
||||
_ESP DD ?
|
||||
_EBP DD ?
|
||||
_ESI DD ?
|
||||
_EDI DD ?
|
||||
_ES DW ?
|
||||
DW ?
|
||||
_CS DW ?
|
||||
DW ?
|
||||
_SS DW ?
|
||||
DW ?
|
||||
_DS DW ?
|
||||
DW ?
|
||||
_FS DW ?
|
||||
DW ?
|
||||
_GS DW ?
|
||||
DW ?
|
||||
LDT DW ?
|
||||
DW ?
|
||||
DW ?
|
||||
DW ?
|
||||
IA32_TSS ENDS
|
||||
|
||||
; Create 2 TSS segments just after GDT
|
||||
TssDescriptor LABEL BYTE
|
||||
DW 0 ; PreviousTaskLink
|
||||
DW 0 ; Reserved
|
||||
DD 0 ; ESP0
|
||||
DW 0 ; SS0
|
||||
DW 0 ; Reserved
|
||||
DD 0 ; ESP1
|
||||
DW 0 ; SS1
|
||||
DW 0 ; Reserved
|
||||
DD 0 ; ESP2
|
||||
DW 0 ; SS2
|
||||
DW 0 ; Reserved
|
||||
DD 0 ; CR3
|
||||
DD 0 ; EIP
|
||||
DD 0 ; EFLAGS
|
||||
DD 0 ; EAX
|
||||
DD 0 ; ECX
|
||||
DD 0 ; EDX
|
||||
DD 0 ; EBX
|
||||
DD 0 ; ESP
|
||||
DD 0 ; EBP
|
||||
DD 0 ; ESI
|
||||
DD 0 ; EDI
|
||||
DW 0 ; ES
|
||||
DW 0 ; Reserved
|
||||
DW 0 ; CS
|
||||
DW 0 ; Reserved
|
||||
DW 0 ; SS
|
||||
DW 0 ; Reserved
|
||||
DW 0 ; DS
|
||||
DW 0 ; Reserved
|
||||
DW 0 ; FS
|
||||
DW 0 ; Reserved
|
||||
DW 0 ; GS
|
||||
DW 0 ; Reserved
|
||||
DW 0 ; LDT Selector
|
||||
DW 0 ; Reserved
|
||||
DW 0 ; T
|
||||
DW 0 ; I/O Map Base
|
||||
TSS_DESC_SIZE = $ - offset TssDescriptor
|
||||
|
||||
ExceptionTssDescriptor LABEL BYTE
|
||||
DW 0 ; PreviousTaskLink
|
||||
DW 0 ; Reserved
|
||||
DD 0 ; ESP0
|
||||
DW 0 ; SS0
|
||||
DW 0 ; Reserved
|
||||
DD 0 ; ESP1
|
||||
DW 0 ; SS1
|
||||
DW 0 ; Reserved
|
||||
DD 0 ; ESP2
|
||||
DW 0 ; SS2
|
||||
DW 0 ; Reserved
|
||||
DD 0 ; CR3
|
||||
DD offset PFHandlerEntry ; EIP
|
||||
DD 00000002 ; EFLAGS
|
||||
DD 0 ; EAX
|
||||
DD 0 ; ECX
|
||||
DD 0 ; EDX
|
||||
DD 0 ; EBX
|
||||
DD 0 ; ESP
|
||||
DD 0 ; EBP
|
||||
DD 0 ; ESI
|
||||
DD 0 ; EDI
|
||||
DW DATA_SEL ; ES
|
||||
DW 0 ; Reserved
|
||||
DW CODE_SEL ; CS
|
||||
DW 0 ; Reserved
|
||||
DW DATA_SEL ; SS
|
||||
DW 0 ; Reserved
|
||||
DW DATA_SEL ; DS
|
||||
DW 0 ; Reserved
|
||||
DW DATA_SEL ; FS
|
||||
DW 0 ; Reserved
|
||||
DW DATA_SEL ; GS
|
||||
DW 0 ; Reserved
|
||||
DW 0 ; LDT Selector
|
||||
DW 0 ; Reserved
|
||||
DW 0 ; T
|
||||
DW 0 ; I/O Map Base
|
||||
|
||||
gcPsd LABEL BYTE
|
||||
DB 'PSDSIG '
|
||||
DW PSD_SIZE
|
||||
DW 2
|
||||
DW 1 SHL 2
|
||||
DW CODE_SEL
|
||||
DW DATA_SEL
|
||||
DW DATA_SEL
|
||||
DW DATA_SEL
|
||||
DW 0
|
||||
DQ 0
|
||||
DQ 0
|
||||
DQ 0
|
||||
DQ offset NullSeg
|
||||
DD GDT_SIZE
|
||||
DD 0
|
||||
DB 24 dup (0)
|
||||
DQ 0
|
||||
PSD_SIZE = $ - offset gcPsd
|
||||
|
||||
gcSmiGdtr LABEL FWORD
|
||||
DW GDT_SIZE - 1
|
||||
DD offset NullSeg
|
||||
|
||||
gcSmiIdtr LABEL FWORD
|
||||
DW 0
|
||||
DD 0
|
||||
|
||||
gTaskGateDescriptor LABEL QWORD
|
||||
DW 0 ; Reserved
|
||||
DW EXCEPTION_TSS_SEL ; TSS Segment selector
|
||||
DB 0 ; Reserved
|
||||
DB 85h ; Task Gate, present, DPL = 0
|
||||
DW 0 ; Reserved
|
||||
|
||||
|
||||
.code
|
||||
;------------------------------------------------------------------------------
|
||||
; PageFaultIdtHandlerSmmProfile is the entry point page fault only
|
||||
;
|
||||
;
|
||||
; Stack:
|
||||
; +---------------------+
|
||||
; + EFlags +
|
||||
; +---------------------+
|
||||
; + CS +
|
||||
; +---------------------+
|
||||
; + EIP +
|
||||
; +---------------------+
|
||||
; + Error Code +
|
||||
; +---------------------+
|
||||
; + Vector Number +
|
||||
; +---------------------+
|
||||
; + EBP +
|
||||
; +---------------------+ <-- EBP
|
||||
;
|
||||
;
|
||||
;------------------------------------------------------------------------------
|
||||
PageFaultIdtHandlerSmmProfile PROC
|
||||
push 0eh ; Page Fault
|
||||
|
||||
push ebp
|
||||
mov ebp, esp
|
||||
|
||||
|
||||
;
|
||||
; Align stack to make sure that EFI_FX_SAVE_STATE_IA32 of EFI_SYSTEM_CONTEXT_IA32
|
||||
; is 16-byte aligned
|
||||
;
|
||||
and esp, 0fffffff0h
|
||||
sub esp, 12
|
||||
|
||||
;; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
|
||||
push eax
|
||||
push ecx
|
||||
push edx
|
||||
push ebx
|
||||
lea ecx, [ebp + 6 * 4]
|
||||
push ecx ; ESP
|
||||
push dword ptr [ebp] ; EBP
|
||||
push esi
|
||||
push edi
|
||||
|
||||
;; UINT32 Gs, Fs, Es, Ds, Cs, Ss;
|
||||
mov eax, ss
|
||||
push eax
|
||||
movzx eax, word ptr [ebp + 4 * 4]
|
||||
push eax
|
||||
mov eax, ds
|
||||
push eax
|
||||
mov eax, es
|
||||
push eax
|
||||
mov eax, fs
|
||||
push eax
|
||||
mov eax, gs
|
||||
push eax
|
||||
|
||||
;; UINT32 Eip;
|
||||
mov eax, [ebp + 3 * 4]
|
||||
push eax
|
||||
|
||||
;; UINT32 Gdtr[2], Idtr[2];
|
||||
sub esp, 8
|
||||
sidt [esp]
|
||||
mov eax, [esp + 2]
|
||||
xchg eax, [esp]
|
||||
and eax, 0FFFFh
|
||||
mov [esp+4], eax
|
||||
|
||||
sub esp, 8
|
||||
sgdt [esp]
|
||||
mov eax, [esp + 2]
|
||||
xchg eax, [esp]
|
||||
and eax, 0FFFFh
|
||||
mov [esp+4], eax
|
||||
|
||||
;; UINT32 Ldtr, Tr;
|
||||
xor eax, eax
|
||||
str ax
|
||||
push eax
|
||||
sldt ax
|
||||
push eax
|
||||
|
||||
;; UINT32 EFlags;
|
||||
mov eax, [ebp + 5 * 4]
|
||||
push eax
|
||||
|
||||
;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
|
||||
mov eax, cr4
|
||||
or eax, 208h
|
||||
mov cr4, eax
|
||||
push eax
|
||||
mov eax, cr3
|
||||
push eax
|
||||
mov eax, cr2
|
||||
push eax
|
||||
xor eax, eax
|
||||
push eax
|
||||
mov eax, cr0
|
||||
push eax
|
||||
|
||||
;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
||||
mov eax, dr7
|
||||
push eax
|
||||
mov eax, dr6
|
||||
push eax
|
||||
mov eax, dr3
|
||||
push eax
|
||||
mov eax, dr2
|
||||
push eax
|
||||
mov eax, dr1
|
||||
push eax
|
||||
mov eax, dr0
|
||||
push eax
|
||||
|
||||
;; FX_SAVE_STATE_IA32 FxSaveState;
|
||||
sub esp, 512
|
||||
mov edi, esp
|
||||
db 0fh, 0aeh, 07h ;fxsave [edi]
|
||||
|
||||
; UEFI calling convention for IA32 requires that Direction flag in EFLAGs is clear
|
||||
cld
|
||||
|
||||
;; UINT32 ExceptionData;
|
||||
push dword ptr [ebp + 2 * 4]
|
||||
|
||||
;; call into exception handler
|
||||
|
||||
;; Prepare parameter and call
|
||||
mov edx, esp
|
||||
push edx
|
||||
mov edx, dword ptr [ebp + 1 * 4]
|
||||
push edx
|
||||
|
||||
;
|
||||
; Call External Exception Handler
|
||||
;
|
||||
mov eax, SmiPFHandler
|
||||
call eax
|
||||
add esp, 8
|
||||
|
||||
;; UINT32 ExceptionData;
|
||||
add esp, 4
|
||||
|
||||
;; FX_SAVE_STATE_IA32 FxSaveState;
|
||||
mov esi, esp
|
||||
db 0fh, 0aeh, 0eh ; fxrstor [esi]
|
||||
add esp, 512
|
||||
|
||||
;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
||||
;; Skip restoration of DRx registers to support debuggers
|
||||
;; that set breakpoint in interrupt/exception context
|
||||
add esp, 4 * 6
|
||||
|
||||
;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
|
||||
pop eax
|
||||
mov cr0, eax
|
||||
add esp, 4 ; not for Cr1
|
||||
pop eax
|
||||
mov cr2, eax
|
||||
pop eax
|
||||
mov cr3, eax
|
||||
pop eax
|
||||
mov cr4, eax
|
||||
|
||||
;; UINT32 EFlags;
|
||||
pop dword ptr [ebp + 5 * 4]
|
||||
|
||||
;; UINT32 Ldtr, Tr;
|
||||
;; UINT32 Gdtr[2], Idtr[2];
|
||||
;; Best not let anyone mess with these particular registers...
|
||||
add esp, 24
|
||||
|
||||
;; UINT32 Eip;
|
||||
pop dword ptr [ebp + 3 * 4]
|
||||
|
||||
;; UINT32 Gs, Fs, Es, Ds, Cs, Ss;
|
||||
;; NOTE - modified segment registers could hang the debugger... We
|
||||
;; could attempt to insulate ourselves against this possibility,
|
||||
;; but that poses risks as well.
|
||||
;;
|
||||
pop gs
|
||||
pop fs
|
||||
pop es
|
||||
pop ds
|
||||
pop dword ptr [ebp + 4 * 4]
|
||||
pop ss
|
||||
|
||||
;; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
|
||||
pop edi
|
||||
pop esi
|
||||
add esp, 4 ; not for ebp
|
||||
add esp, 4 ; not for esp
|
||||
pop ebx
|
||||
pop edx
|
||||
pop ecx
|
||||
pop eax
|
||||
|
||||
mov esp, ebp
|
||||
pop ebp
|
||||
|
||||
; Enable TF bit after page fault handler runs
|
||||
bts dword ptr [esp + 16], 8 ; EFLAGS
|
||||
|
||||
add esp, 8 ; skip INT# & ErrCode
|
||||
Return:
|
||||
iretd
|
||||
;
|
||||
; Page Fault Exception Handler entry when SMM Stack Guard is enabled
|
||||
; Executiot starts here after a task switch
|
||||
;
|
||||
PFHandlerEntry::
|
||||
;
|
||||
; Get this processor's TSS
|
||||
;
|
||||
sub esp, 8
|
||||
sgdt [esp + 2]
|
||||
mov eax, [esp + 4] ; GDT base
|
||||
add esp, 8
|
||||
mov ecx, [eax + TSS_SEL + 2]
|
||||
shl ecx, 8
|
||||
mov cl, [eax + TSS_SEL + 7]
|
||||
ror ecx, 8 ; ecx = TSS base
|
||||
|
||||
mov ebp, esp
|
||||
|
||||
;
|
||||
; Align stack to make sure that EFI_FX_SAVE_STATE_IA32 of EFI_SYSTEM_CONTEXT_IA32
|
||||
; is 16-byte aligned
|
||||
;
|
||||
and esp, 0fffffff0h
|
||||
sub esp, 12
|
||||
|
||||
;; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
|
||||
push (IA32_TSS ptr [ecx])._EAX
|
||||
push (IA32_TSS ptr [ecx])._ECX
|
||||
push (IA32_TSS ptr [ecx])._EDX
|
||||
push (IA32_TSS ptr [ecx])._EBX
|
||||
push (IA32_TSS ptr [ecx])._ESP
|
||||
push (IA32_TSS ptr [ecx])._EBP
|
||||
push (IA32_TSS ptr [ecx])._ESI
|
||||
push (IA32_TSS ptr [ecx])._EDI
|
||||
|
||||
;; UINT32 Gs, Fs, Es, Ds, Cs, Ss;
|
||||
movzx eax, (IA32_TSS ptr [ecx])._SS
|
||||
push eax
|
||||
movzx eax, (IA32_TSS ptr [ecx])._CS
|
||||
push eax
|
||||
movzx eax, (IA32_TSS ptr [ecx])._DS
|
||||
push eax
|
||||
movzx eax, (IA32_TSS ptr [ecx])._ES
|
||||
push eax
|
||||
movzx eax, (IA32_TSS ptr [ecx])._FS
|
||||
push eax
|
||||
movzx eax, (IA32_TSS ptr [ecx])._GS
|
||||
push eax
|
||||
|
||||
;; UINT32 Eip;
|
||||
push (IA32_TSS ptr [ecx]).EIP
|
||||
|
||||
;; UINT32 Gdtr[2], Idtr[2];
|
||||
sub esp, 8
|
||||
sidt [esp]
|
||||
mov eax, [esp + 2]
|
||||
xchg eax, [esp]
|
||||
and eax, 0FFFFh
|
||||
mov [esp+4], eax
|
||||
|
||||
sub esp, 8
|
||||
sgdt [esp]
|
||||
mov eax, [esp + 2]
|
||||
xchg eax, [esp]
|
||||
and eax, 0FFFFh
|
||||
mov [esp+4], eax
|
||||
|
||||
;; UINT32 Ldtr, Tr;
|
||||
mov eax, TSS_SEL
|
||||
push eax
|
||||
movzx eax, (IA32_TSS ptr [ecx]).LDT
|
||||
push eax
|
||||
|
||||
;; UINT32 EFlags;
|
||||
push (IA32_TSS ptr [ecx]).EFLAGS
|
||||
|
||||
;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
|
||||
mov eax, cr4
|
||||
or eax, 208h
|
||||
mov cr4, eax
|
||||
push eax
|
||||
mov eax, cr3
|
||||
push eax
|
||||
mov eax, cr2
|
||||
push eax
|
||||
xor eax, eax
|
||||
push eax
|
||||
mov eax, cr0
|
||||
push eax
|
||||
|
||||
;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
||||
mov eax, dr7
|
||||
push eax
|
||||
mov eax, dr6
|
||||
push eax
|
||||
mov eax, dr3
|
||||
push eax
|
||||
mov eax, dr2
|
||||
push eax
|
||||
mov eax, dr1
|
||||
push eax
|
||||
mov eax, dr0
|
||||
push eax
|
||||
|
||||
;; FX_SAVE_STATE_IA32 FxSaveState;
|
||||
;; Clear TS bit in CR0 to avoid Device Not Available Exception (#NM)
|
||||
;; when executing fxsave/fxrstor instruction
|
||||
clts
|
||||
sub esp, 512
|
||||
mov edi, esp
|
||||
db 0fh, 0aeh, 07h ;fxsave [edi]
|
||||
|
||||
; UEFI calling convention for IA32 requires that Direction flag in EFLAGs is clear
|
||||
cld
|
||||
|
||||
;; UINT32 ExceptionData;
|
||||
push dword ptr [ebp]
|
||||
|
||||
;; call into exception handler
|
||||
mov ebx, ecx
|
||||
mov eax, SmiPFHandler
|
||||
|
||||
;; Prepare parameter and call
|
||||
mov edx, esp
|
||||
push edx
|
||||
mov edx, 14
|
||||
push edx
|
||||
|
||||
;
|
||||
; Call External Exception Handler
|
||||
;
|
||||
call eax
|
||||
add esp, 8
|
||||
|
||||
mov ecx, ebx
|
||||
;; UINT32 ExceptionData;
|
||||
add esp, 4
|
||||
|
||||
;; FX_SAVE_STATE_IA32 FxSaveState;
|
||||
mov esi, esp
|
||||
db 0fh, 0aeh, 0eh ; fxrstor [esi]
|
||||
add esp, 512
|
||||
|
||||
;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;
|
||||
;; Skip restoration of DRx registers to support debuggers
|
||||
;; that set breakpoints in interrupt/exception context
|
||||
add esp, 4 * 6
|
||||
|
||||
;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;
|
||||
pop eax
|
||||
mov cr0, eax
|
||||
add esp, 4 ; not for Cr1
|
||||
pop eax
|
||||
mov cr2, eax
|
||||
pop eax
|
||||
mov (IA32_TSS ptr [ecx])._CR3, eax
|
||||
pop eax
|
||||
mov cr4, eax
|
||||
|
||||
;; UINT32 EFlags;
|
||||
pop (IA32_TSS ptr [ecx]).EFLAGS
|
||||
|
||||
;; UINT32 Ldtr, Tr;
|
||||
;; UINT32 Gdtr[2], Idtr[2];
|
||||
;; Best not let anyone mess with these particular registers...
|
||||
add esp, 24
|
||||
|
||||
;; UINT32 Eip;
|
||||
pop (IA32_TSS ptr [ecx]).EIP
|
||||
|
||||
;; UINT32 Gs, Fs, Es, Ds, Cs, Ss;
|
||||
;; NOTE - modified segment registers could hang the debugger... We
|
||||
;; could attempt to insulate ourselves against this possibility,
|
||||
;; but that poses risks as well.
|
||||
;;
|
||||
pop eax
|
||||
mov (IA32_TSS ptr [ecx])._GS, ax
|
||||
pop eax
|
||||
mov (IA32_TSS ptr [ecx])._FS, ax
|
||||
pop eax
|
||||
mov (IA32_TSS ptr [ecx])._ES, ax
|
||||
pop eax
|
||||
mov (IA32_TSS ptr [ecx])._DS, ax
|
||||
pop eax
|
||||
mov (IA32_TSS ptr [ecx])._CS, ax
|
||||
pop eax
|
||||
mov (IA32_TSS ptr [ecx])._SS, ax
|
||||
|
||||
;; UINT32 Edi, Esi, Ebp, Esp, Ebx, Edx, Ecx, Eax;
|
||||
pop (IA32_TSS ptr [ecx])._EDI
|
||||
pop (IA32_TSS ptr [ecx])._ESI
|
||||
add esp, 4 ; not for ebp
|
||||
add esp, 4 ; not for esp
|
||||
pop (IA32_TSS ptr [ecx])._EBX
|
||||
pop (IA32_TSS ptr [ecx])._EDX
|
||||
pop (IA32_TSS ptr [ecx])._ECX
|
||||
pop (IA32_TSS ptr [ecx])._EAX
|
||||
|
||||
mov esp, ebp
|
||||
|
||||
; Set single step DB# if SMM profile is enabled and page fault exception happens
|
||||
cmp FeaturePcdGet (PcdCpuSmmProfileEnable), 0
|
||||
jz @Done2
|
||||
|
||||
; Create return context for iretd in stub function
|
||||
mov eax, (IA32_TSS ptr [ecx])._ESP ; Get old stack pointer
|
||||
mov ebx, (IA32_TSS ptr [ecx]).EIP
|
||||
mov [eax - 0ch], ebx ; create EIP in old stack
|
||||
movzx ebx, (IA32_TSS ptr [ecx])._CS
|
||||
mov [eax - 08h], ebx ; create CS in old stack
|
||||
mov ebx, (IA32_TSS ptr [ecx]).EFLAGS
|
||||
bts ebx, 8
|
||||
mov [eax - 04h], ebx ; create eflags in old stack
|
||||
mov eax, (IA32_TSS ptr [ecx])._ESP ; Get old stack pointer
|
||||
sub eax, 0ch ; minus 12 byte
|
||||
mov (IA32_TSS ptr [ecx])._ESP, eax ; Set new stack pointer
|
||||
; Replace the EIP of interrupted task with stub function
|
||||
mov eax, PageFaultStubFunction
|
||||
mov (IA32_TSS ptr [ecx]).EIP, eax
|
||||
; Jump to the iretd so next page fault handler as a task will start again after iretd.
|
||||
@Done2:
|
||||
add esp, 4 ; skip ErrCode
|
||||
|
||||
jmp Return
|
||||
PageFaultIdtHandlerSmmProfile ENDP
|
||||
|
||||
PageFaultStubFunction PROC
|
||||
;
|
||||
; we need clean TS bit in CR0 to execute
|
||||
; x87 FPU/MMX/SSE/SSE2/SSE3/SSSE3/SSE4 instructions.
|
||||
;
|
||||
clts
|
||||
iretd
|
||||
PageFaultStubFunction ENDP
|
||||
|
||||
END
|
||||
@@ -1,84 +0,0 @@
|
||||
#------------------------------------------------------------------------------
|
||||
#
|
||||
# Copyright (c) 2009 - 2015, 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:
|
||||
#
|
||||
# SmmInit.S
|
||||
#
|
||||
# Abstract:
|
||||
#
|
||||
# Functions for relocating SMBASE's for all processors
|
||||
#
|
||||
#------------------------------------------------------------------------------
|
||||
|
||||
ASM_GLOBAL ASM_PFX(gSmmCr0)
|
||||
ASM_GLOBAL ASM_PFX(gSmmCr3)
|
||||
ASM_GLOBAL ASM_PFX(gSmmCr4)
|
||||
ASM_GLOBAL ASM_PFX(gcSmmInitTemplate)
|
||||
ASM_GLOBAL ASM_PFX(gcSmmInitSize)
|
||||
ASM_GLOBAL ASM_PFX(gSmmJmpAddr)
|
||||
ASM_GLOBAL ASM_PFX(SmmRelocationSemaphoreComplete)
|
||||
ASM_GLOBAL ASM_PFX(gSmmInitStack)
|
||||
ASM_GLOBAL ASM_PFX(gcSmiInitGdtr)
|
||||
|
||||
.equ PROTECT_MODE_CS, 0x08
|
||||
.equ PROTECT_MODE_DS, 0x20
|
||||
|
||||
.text
|
||||
|
||||
ASM_PFX(gcSmiInitGdtr):
|
||||
.word 0
|
||||
.quad 0
|
||||
|
||||
SmmStartup:
|
||||
.byte 0x66,0xb8
|
||||
ASM_PFX(gSmmCr3): .space 4
|
||||
movl %eax, %cr3
|
||||
.byte 0x67,0x66
|
||||
lgdt %cs:(ASM_PFX(gcSmiInitGdtr) - SmmStartup)(%ebp)
|
||||
.byte 0x66,0xb8
|
||||
ASM_PFX(gSmmCr4): .space 4
|
||||
movl %eax, %cr4
|
||||
.byte 0x66,0xb8
|
||||
ASM_PFX(gSmmCr0): .space 4
|
||||
.byte 0xbf, PROTECT_MODE_DS, 0 # mov di, PROTECT_MODE_DS
|
||||
movl %eax, %cr0
|
||||
.byte 0x66,0xea # jmp far [ptr48]
|
||||
ASM_PFX(gSmmJmpAddr): .long Start32bit
|
||||
.word PROTECT_MODE_CS
|
||||
Start32bit:
|
||||
movl %edi,%ds
|
||||
movl %edi,%es
|
||||
movl %edi,%fs
|
||||
movl %edi,%gs
|
||||
movl %edi,%ss
|
||||
.byte 0xbc # mov esp, imm32
|
||||
ASM_PFX(gSmmInitStack): .space 4
|
||||
call ASM_PFX(SmmInitHandler)
|
||||
rsm
|
||||
|
||||
ASM_PFX(gcSmmInitTemplate):
|
||||
|
||||
_SmmInitTemplate:
|
||||
.byte 0x66
|
||||
movl $SmmStartup, %ebp
|
||||
.byte 0x66, 0x81, 0xed, 0, 0, 3, 0 # sub ebp, 0x30000
|
||||
jmp *%bp # jmp ebp actually
|
||||
|
||||
ASM_PFX(gcSmmInitSize): .word . - ASM_PFX(gcSmmInitTemplate)
|
||||
|
||||
|
||||
ASM_PFX(SmmRelocationSemaphoreComplete):
|
||||
pushl %eax
|
||||
movl ASM_PFX(mRebasedFlag), %eax
|
||||
movb $1, (%eax)
|
||||
popl %eax
|
||||
jmp *ASM_PFX(mSmmRelocationOriginalAddress)
|
||||
@@ -1,94 +0,0 @@
|
||||
;------------------------------------------------------------------------------ ;
|
||||
; Copyright (c) 2009 - 2015, 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:
|
||||
;
|
||||
; SmmInit.Asm
|
||||
;
|
||||
; Abstract:
|
||||
;
|
||||
; Functions for relocating SMBASE's for all processors
|
||||
;
|
||||
;-------------------------------------------------------------------------------
|
||||
|
||||
.686p
|
||||
.xmm
|
||||
.model flat,C
|
||||
|
||||
SmmInitHandler PROTO C
|
||||
|
||||
EXTERNDEF C gSmmCr0:DWORD
|
||||
EXTERNDEF C gSmmCr3:DWORD
|
||||
EXTERNDEF C gSmmCr4:DWORD
|
||||
EXTERNDEF C gcSmmInitTemplate:BYTE
|
||||
EXTERNDEF C gcSmmInitSize:WORD
|
||||
EXTERNDEF C gSmmJmpAddr:QWORD
|
||||
EXTERNDEF C mRebasedFlag:PTR BYTE
|
||||
EXTERNDEF C mSmmRelocationOriginalAddress:DWORD
|
||||
EXTERNDEF C gSmmInitStack:DWORD
|
||||
EXTERNDEF C gcSmiInitGdtr:FWORD
|
||||
|
||||
PROTECT_MODE_CS EQU 08h
|
||||
PROTECT_MODE_DS EQU 20h
|
||||
|
||||
.code
|
||||
|
||||
gcSmiInitGdtr LABEL FWORD
|
||||
DW 0
|
||||
DQ 0
|
||||
|
||||
SmmStartup PROC
|
||||
DB 66h, 0b8h
|
||||
gSmmCr3 DD ?
|
||||
mov cr3, eax
|
||||
DB 67h, 66h
|
||||
lgdt fword ptr cs:[ebp + (offset gcSmiInitGdtr - SmmStartup)]
|
||||
DB 66h, 0b8h
|
||||
gSmmCr4 DD ?
|
||||
mov cr4, eax
|
||||
DB 66h, 0b8h
|
||||
gSmmCr0 DD ?
|
||||
DB 0bfh, PROTECT_MODE_DS, 0 ; mov di, PROTECT_MODE_DS
|
||||
mov cr0, eax
|
||||
DB 66h, 0eah ; jmp far [ptr48]
|
||||
gSmmJmpAddr LABEL QWORD
|
||||
DD @32bit
|
||||
DW PROTECT_MODE_CS
|
||||
@32bit:
|
||||
mov ds, edi
|
||||
mov es, edi
|
||||
mov fs, edi
|
||||
mov gs, edi
|
||||
mov ss, edi
|
||||
DB 0bch ; mov esp, imm32
|
||||
gSmmInitStack DD ?
|
||||
call SmmInitHandler
|
||||
rsm
|
||||
SmmStartup ENDP
|
||||
|
||||
gcSmmInitTemplate LABEL BYTE
|
||||
|
||||
_SmmInitTemplate PROC
|
||||
DB 66h
|
||||
mov ebp, SmmStartup
|
||||
DB 66h, 81h, 0edh, 00h, 00h, 03h, 00 ; sub ebp, 30000h
|
||||
jmp bp ; jmp ebp actually
|
||||
_SmmInitTemplate ENDP
|
||||
|
||||
gcSmmInitSize DW $ - gcSmmInitTemplate
|
||||
|
||||
SmmRelocationSemaphoreComplete PROC
|
||||
push eax
|
||||
mov eax, mRebasedFlag
|
||||
mov byte ptr [eax], 1
|
||||
pop eax
|
||||
jmp [mSmmRelocationOriginalAddress]
|
||||
SmmRelocationSemaphoreComplete ENDP
|
||||
END
|
||||
Reference in New Issue
Block a user