crashanalysercmd/PerfToolsSharedLibraries/Engine/SymbianStackLib/Plugins/Accurate/Instructions/Types/AccInstDataProcessing.cs
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/crashanalysercmd/PerfToolsSharedLibraries/Engine/SymbianStackLib/Plugins/Accurate/Instructions/Types/AccInstDataProcessing.cs Thu Feb 11 15:50:58 2010 +0200
@@ -0,0 +1,185 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+*
+*/
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.IO;
+using SymbianUtils.BasicTypes;
+using SymbianStackAlgorithmAccurate.CPU;
+using SymbianStackAlgorithmAccurate.Prologue;
+using SymbianStructuresLib.Arm;
+using SymbianStructuresLib.Arm.Instructions;
+using SymbianStructuresLib.Arm.Registers;
+using SymbianInstructionLib.Arm.Instructions.Common;
+using SymbianInstructionLib.Arm.Instructions.Arm;
+using SymbianInstructionLib.Arm.Instructions.Arm.DataProcessing;
+using SymbianInstructionLib.Arm.Instructions.Thumb;
+using SymbianInstructionLib.Arm.Instructions.Thumb.DataProcessing;
+
+namespace SymbianStackAlgorithmAccurate.Instructions.Types
+{
+ internal class AccInstDataProcessing : AccInstruction
+ {
+ #region Constructors
+ public AccInstDataProcessing( IArmInstruction aInstruction )
+ : base( aInstruction )
+ {
+ System.Diagnostics.Debug.Assert( base.Instruction.AIGroup == TArmInstructionGroup.EGroupDataProcessing );
+ }
+ #endregion
+
+ #region API
+ internal override void Process( ArmPrologueHelper aProlog )
+ {
+ IArmInstruction instruction = base.Instruction;
+
+ // Only unconditional instructions are handled
+ if ( instruction.AIConditionCode == TArmInstructionCondition.AL )
+ {
+ // Two heuristically observed requirements:
+ //
+ // 1) It must be an immediate instruction
+ // 2) It must apply with source & destination registers both being SP
+ if ( instruction is ArmInstruction )
+ {
+ // Aim is to detect modifications to SP (i.e. reservation of stack space)
+ Arm_DataProcessing armDpInst = instruction as Arm_DataProcessing;
+
+ // 1) Must supply an immediate value
+ if ( armDpInst != null && armDpInst.SuppliesImmediate )
+ {
+ // 2) Must apply to SP
+ if ( armDpInst.Rd == TArmRegisterType.EArmReg_SP &&
+ armDpInst.Rn == TArmRegisterType.EArmReg_SP )
+ {
+ uint immediate = armDpInst.Immediate;
+ HandleDPOperation( armDpInst.OperationType, immediate, aProlog );
+ }
+ }
+ }
+ else if ( instruction is ThumbInstruction )
+ {
+ Thumb_AddOrSubtract thumbDpInst = instruction as Thumb_AddOrSubtract;
+
+ // 2) Must apply to SP
+ if ( thumbDpInst.Rd == TArmRegisterType.EArmReg_SP )
+ {
+ // 1) Must supply an immediate value
+ if ( thumbDpInst != null && thumbDpInst.SuppliesImmediate )
+ {
+ uint immediate = thumbDpInst.Immediate;
+ HandleDPOperation( thumbDpInst.OperationType, immediate, aProlog );
+ }
+ else if ( thumbDpInst is Thumb_Add_2Regs_High )
+ {
+ // Handle the case where one register supplies the number of
+ // words by which the stack pointer is incremented. Used when
+ // a large stack allocation is made.
+ }
+ }
+ }
+ else
+ {
+ throw new NotSupportedException( "Instruction type not supported" );
+ }
+ }
+ }
+ #endregion
+
+ #region Properties
+ public bool AppliesToSP
+ {
+ get
+ {
+ bool ret = false;
+ IArmInstruction instruction = base.Instruction;
+
+ // Only unconditional instructions are handled
+ if ( instruction.AIConditionCode == TArmInstructionCondition.AL )
+ {
+ // Two heuristically observed requirements:
+ //
+ // 1) It must be an immediate instruction
+ // 2) It must apply with source & destination registers both being SP
+ if ( instruction is ArmInstruction )
+ {
+ // Aim is to detect modifications to SP (i.e. reservation of stack space)
+ Arm_DataProcessing armDpInst = instruction as Arm_DataProcessing;
+
+ // 1) Must supply an immediate value
+ if ( armDpInst != null && armDpInst.SuppliesImmediate )
+ {
+ // 2) Must apply to SP
+ if ( armDpInst.Rd == TArmRegisterType.EArmReg_SP &&
+ armDpInst.Rn == TArmRegisterType.EArmReg_SP )
+ {
+ ret = true;
+ }
+ }
+ }
+ else if ( instruction is ThumbInstruction )
+ {
+ Thumb_AddOrSubtract thumbDpInst = instruction as Thumb_AddOrSubtract;
+
+ // 2) Must apply to SP
+ if ( thumbDpInst.Rd == TArmRegisterType.EArmReg_SP )
+ {
+ // 1) Must supply an immediate value
+ if ( thumbDpInst != null && thumbDpInst.SuppliesImmediate )
+ {
+ ret = true;
+ }
+ else if ( thumbDpInst is Thumb_Add_2Regs_High )
+ {
+ // Handle the case where one register supplies the number of
+ // words by which the stack pointer is incremented. Used when
+ // a large stack allocation is made.
+ }
+ }
+ }
+ }
+
+ return ret;
+ }
+ }
+ #endregion
+
+ #region Internal methods
+ private void HandleDPOperation( TArmDataProcessingType aType, uint aImmediate, ArmPrologueHelper aProlog )
+ {
+ int wordsPushed = (int) aImmediate / 4;
+ //
+ switch( aType )
+ {
+ case TArmDataProcessingType.ADD:
+ wordsPushed = -wordsPushed;
+ break;
+ case TArmDataProcessingType.SUB:
+ break;
+ default:
+ throw new NotSupportedException( "Data processing does not (yet) support instructions of type: " + aType );
+ }
+ //
+ aProlog.AddToNumberOfWordsPushedOnStack( wordsPushed );
+ }
+ #endregion
+
+ #region Data members
+ #endregion
+ }
+}
+