SmmFuncsArch.c File Reference

#include "PiSmmCpuCommon.h"

Go to the source code of this file.

Functions
VOID EFIAPI	InitializeIdtIst (IN EFI_EXCEPTION_TYPE ExceptionType, IN UINT8 Ist)
VOID *	InitGdt (IN UINTN Cr3, OUT UINTN *GdtStepSize)
UINT16	GetProtectedModeCS (VOID)
VOID	InitShadowStack (IN UINTN CpuIndex, IN VOID *ShadowStack)

Variables
EFI_PHYSICAL_ADDRESS	mGdtBuffer
UINTN	mGdtBufferSize
BOOLEAN	mCetSupported
X86_ASSEMBLY_PATCH_LABEL	mPatchCetPl0Ssp
X86_ASSEMBLY_PATCH_LABEL	mPatchCetInterruptSsp
X86_ASSEMBLY_PATCH_LABEL	mPatchCetInterruptSspTable
UINT32	mCetPl0Ssp
UINT32	mCetInterruptSsp
UINT32	mCetInterruptSspTable
UINTN	mSmmInterruptSspTables

Detailed Description

SMM CPU misc functions for x64 arch specific.

Copyright (c) 2015 - 2024, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file SmmFuncsArch.c.

Function Documentation

GetProtectedModeCS()

UINT16 GetProtectedModeCS

(

VOID

)

Get Protected mode code segment from current GDT table.

Returns

Protected mode code segment value.

Definition at line 109 of file SmmFuncsArch.c.

InitGdt()

VOID * InitGdt	(	IN UINTN	Cr3,
		OUT UINTN *	GdtStepSize
	)

Initialize Gdt for all processors.

Parameters

[in]	Cr3	CR3 value.
[out]	GdtStepSize	The step size for GDT table.

Returns

GdtBase for processor 0. GdtBase for processor X is: GdtBase + (GdtStepSize * X)

Definition at line 56 of file SmmFuncsArch.c.

InitializeIdtIst()

VOID EFIAPI InitializeIdtIst	(	IN EFI_EXCEPTION_TYPE	ExceptionType,
		IN UINT8	Ist
	)

Initialize IDT IST Field.

Parameters

[in]	ExceptionType	Exception type.
[in]	Ist	IST value.

Definition at line 34 of file SmmFuncsArch.c.

InitShadowStack()

VOID InitShadowStack	(	IN UINTN	CpuIndex,
		IN VOID *	ShadowStack
	)

Initialize the shadow stack related data structure.

Parameters

CpuIndex	The index of CPU.
ShadowStack	The bottom of the shadow stack for this CPU.

Definition at line 142 of file SmmFuncsArch.c.

Variable Documentation

mCetInterruptSsp

UINT32 mCetInterruptSsp

Definition at line 20 of file SmmFuncsArch.c.

mCetInterruptSspTable

UINT32 mCetInterruptSspTable

Definition at line 21 of file SmmFuncsArch.c.

mCetPl0Ssp

UINT32 mCetPl0Ssp

Definition at line 19 of file SmmFuncsArch.c.

mCetSupported

BOOLEAN mCetSupported

extern

Definition at line 94 of file PiSmmCpuCommon.c.

mGdtBuffer

EFI_PHYSICAL_ADDRESS mGdtBuffer

Definition at line 11 of file SmmFuncsArch.c.

mGdtBufferSize

UINTN mGdtBufferSize

Definition at line 12 of file SmmFuncsArch.c.

mPatchCetInterruptSsp

X86_ASSEMBLY_PATCH_LABEL mPatchCetInterruptSsp

Definition at line 17 of file SmmFuncsArch.c.

mPatchCetInterruptSspTable

X86_ASSEMBLY_PATCH_LABEL mPatchCetInterruptSspTable

Definition at line 18 of file SmmFuncsArch.c.

mPatchCetPl0Ssp

X86_ASSEMBLY_PATCH_LABEL mPatchCetPl0Ssp

Definition at line 16 of file SmmFuncsArch.c.

mSmmInterruptSspTables

UINTN mSmmInterruptSspTables

Definition at line 23 of file SmmFuncsArch.c.