public override void ReadExternal(BinaryReader input)
{
_flags = input.ReadUInt32();
_abc = new Abc46();
_abc.Length = (uint)(_parent.Header.Length - 4);
_abc.ReadExternal(input);
}
protected override void FormatAbc(SwfLibrary.Abc.Abc46 abc)
{
base.FormatAbc(abc);
MethodBodyInfo methodBody;
AVM2Command command;
int n = abc.MethodBodies.Count;
for (int i = 0; i < n; ++i)
{
methodBody = (MethodBodyInfo)abc.MethodBodies[i];
FormatBody(methodBody);
byte[] code = methodBody.Code;
uint j = 0;
int m = code.Length;
uint k;
while (j < m)
{
k = j;
command = Translator.ToCommand(code[j++]);
if (null == command)
{
throw new Exception("Unknown opcode detected.");
}
j += command.ReadParameters(code, j);
FormatCommand(k, command);
}
}
}
private static MethodBodyInfo FindBody(Abc46 abc, U30 methodIndex)
{
SwfLibrary.Abc.MethodInfo methodInfo = (SwfLibrary.Abc.MethodInfo)abc.Methods[(int)methodIndex];
MethodBodyInfo methodBody = null;
for (int i = 0, n = abc.MethodBodies.Count; i < n; ++i)
{
methodBody = (MethodBodyInfo)abc.MethodBodies[i];
if (methodBody.Method.Value == methodIndex.Value)
{
break;
}
}
return methodBody;
}
public static void CheckInlineFlag(Abc46 abc, MethodBodyInfo body)
{
byte[] code = body.Code;
uint i = 0;
uint n = (uint)code.Length;
while (i < n)
{
AVM2Command command = Translator.ToCommand(code[i++]);
i += command.ReadParameters(code, i);
if (command.OpCode == (byte)Op.FindPropertyStrict)
{
string name = NameUtil.ResolveMultiname(abc, (MultinameInfo)(abc.ConstantPool.MultinameTable[(int)((U30)command.Parameters[0]).Value]));
if (CompilerInline.inlineMarker == name)
{
body.IsInline = true;
return;
}
}
}
}
protected void PatchBody(Abc46 abc, MethodBodyInfo body, int bodyId)
{
AVM2Command command;
AVM2Command inlineCommand;
Dictionary<string, Label> labels = new Dictionary<string, Label>();
ArrayList instructions = new ArrayList();
Label label;
string labelId;
byte[] il = body.Code;
uint i = 0;
uint n = (uint)il.Length;
uint addr;
string name;
bool hasManualMaxStack = false;
uint manualMaxStackValue = 0;
bool patchBody = false;
//bool parseInline = false;
_labelUtil.Clear();
//
// We will convert the bytecode into a format that the As3c compiler can understand.
// When converting labels we will use a ':' in front of them instead of a '.' char for
// the ones "defined" by the ASC so that we have unique names (label syntax is .label)
//
while (i < n)
{
addr = i;
if (_labelUtil.IsMarked(addr))
{
labelId = String.Format(":{0}:", _labelUtil.GetLabelAt(addr).id);
label = new Label(labelId);
labels.Add(labelId, label);
instructions.Add(label);
}
command = Translator.ToCommand(il[i++]);
if (null == command)
{
throw new Exception("Unknown opcode detected.");
}
i += command.ReadParameters(il, i);
switch (command.OpCode)
{
case (byte)Op.Label:
labelId = String.Format(":{0}:", _labelUtil.GetLabelAt(addr).id);
label = new Label(labelId);
labels.Add(labelId, label);
instructions.Add(label);
break;
case (byte)Op.IfEqual:
case (byte)Op.IfFalse:
case (byte)Op.IfGreaterEqual:
case (byte)Op.IfGreaterThan:
case (byte)Op.IfLessEqual:
case (byte)Op.IfLowerThan:
case (byte)Op.IfNotEqual:
case (byte)Op.IfNotGreaterEqual:
case (byte)Op.IfNotGreaterThan:
case (byte)Op.IfNotLowerEqual:
case (byte)Op.IfNotLowerThan:
case (byte)Op.IfStrictEqual:
case (byte)Op.IfStrictNotEqual:
case (byte)Op.IfTrue:
case (byte)Op.Jump:
// Convert label offset to label reference ...
S24 offset = (S24)command.Parameters[0];
command.Parameters[0] = String.Format(":{0}:",_labelUtil.GetLabelAt((uint)(addr + 1 + offset.Length + offset.Value)).id);
instructions.Add(command);
break;
case (byte)Op.GetLex:
name = NameUtil.ResolveMultiname(abc, (MultinameInfo)(abc.ConstantPool.MultinameTable[(int)((U30)command.Parameters[0]).Value]));
//Console.WriteLine("Called GetLex {0}", name);
instructions.Add(command);
break;
case (byte)Op.FindPropertyStrict:
name = NameUtil.ResolveMultiname(abc, (MultinameInfo)(abc.ConstantPool.MultinameTable[(int)((U30)command.Parameters[0]).Value]));
#region INLINE Block
if (inlineWrapper == name)
{
bool parse = true;
patchBody = true;
#if DEBUG
Console.WriteLine("[i] Parsing inline block in method {0}", body.Method.Value);
#endif
while (parse && i < n)
{
inlineCommand = Translator.ToCommand(il[i++]);
if (null == inlineCommand)
{
throw new Exception("Unknown opcode detected.");
}
i += inlineCommand.ReadParameters(il, i);
switch (inlineCommand.OpCode)
{
//
// Debug instructions are kept even if they are in an inline block
//
case (byte)Op.Debug:
case (byte)Op.DebugFile:
case (byte)Op.DebugLine:
instructions.Add(inlineCommand);
break;
//
// Strings are treated as labels -- but make sure it is actually one!
//
case (byte)Op.PushString:
labelId = ((StringInfo)abc.ConstantPool.StringTable[(int)((U30)inlineCommand.Parameters[0])]).ToString();
if (labelId.IndexOf('.') != 0 || labelId.IndexOf(':') != (labelId.Length - 1))
{
throw new Exception(String.Format("Invalid string \"{0}\" in an inline block. Labels have the format \".labelName:\"", labelId));
}
labelId = labelId.Substring(0, labelId.Length - 1);
label = new Label(labelId);
labels.Add(labelId, label);
instructions.Add(label);
break;
//
// GetLex is the one that will bring public::de.popforge.asm::Op on the stack
//
case (byte)Op.GetLex:
name = NameUtil.ResolveMultiname(abc, (MultinameInfo)(abc.ConstantPool.MultinameTable[(int)((U30)inlineCommand.Parameters[0]).Value]));
if (inlineKeyword != name)
{
throw new Exception("Malformed inline block. GetLex call with invalid parameters");
}
List<AVM2Command> args = new List<AVM2Command>();
AVM2Command userCommand = null;
uint argc;
while (i < n)
{
AVM2Command arg = Translator.ToCommand(il[i++]);
if (null == arg)
{
throw new Exception("Unknown opcode detected.");
}
i += arg.ReadParameters(il, i);
if ((byte)Op.CallProperty == arg.OpCode)
{
name = NameUtil.ResolveMultiname(abc, (MultinameInfo)(abc.ConstantPool.MultinameTable[(int)((U30)arg.Parameters[0]).Value]));
userCommand = Translator.ToCommand(name, true);
argc = ((U30)arg.Parameters[1]).Value;
if (null == userCommand)
{
throw new Exception(String.Format("Unknown command {0}.", name));
}
break;
}
args.Add(arg);
}
if (null == userCommand)
{
throw new Exception("Malformed inline block.");
}
instructions.Add(new Instruction(abc, userCommand, args));
break;
case (byte)Op.CallPropertyVoid:
name = NameUtil.ResolveMultiname(abc, (MultinameInfo)(abc.ConstantPool.MultinameTable[(int)((U30)inlineCommand.Parameters[0]).Value]));
if (inlineWrapper == name)
{
parse = false;
}
else
{
throw new Exception("Malformed inline block. Method calls are not accepted ...");
}
break;
}
}
#if DEBUG
Console.WriteLine("[+] Inline block parsed");
#endif
}
#endregion
#region INLINE Marker
else if (inlineMarker == name)
{
#if DEBUG
Console.WriteLine("[i] Body {0} has been marked as inline", body.Method.Value);
#endif
bool parse = true;
while (parse && i < n)
{
inlineCommand = Translator.ToCommand(il[i++]);
if (null == inlineCommand)
{
throw new Exception("Unknown opcode detected.");
}
i += inlineCommand.ReadParameters(il, i);
switch (inlineCommand.OpCode)
{
case (byte)Op.CallPropertyVoid:
name = NameUtil.ResolveMultiname(abc, (MultinameInfo)(abc.ConstantPool.MultinameTable[(int)((U30)inlineCommand.Parameters[0]).Value]));
if (inlineMarker == name)
{
parse = false;
}
else
{
throw new Exception("Malformed inline block. Method calls are not accepted ...");
}
break;
}
}
#if DEBUG
Console.WriteLine("[+] Inline marker parsed.");
#endif
patchBody = true;
}
#endregion
#region MAX_STACK Marker
else if (inlineMaxStack == name)
{
#if DEBUG
Console.WriteLine("[i] Body {0} has a manual maximum stack set.", body.Method.Value);
#endif
bool parse = true;
uint maxStackValue = 0;
bool hasMaxValue = false;
while (parse && i < n)
{
inlineCommand = Translator.ToCommand(il[i++]);
if (null == inlineCommand)
{
throw new Exception("Unknown opcode detected.");
}
i += inlineCommand.ReadParameters(il, i);
switch (inlineCommand.OpCode)
{
case (byte)Op.PushByte:
maxStackValue = (uint)((byte)inlineCommand.Parameters[0]);
hasMaxValue = true;
break;
case (byte)Op.PushShort:
maxStackValue = (uint)((U30)inlineCommand.Parameters[0]);
hasMaxValue = true;
break;
case (byte)Op.PushInt:
maxStackValue = (uint)((S32)abc.ConstantPool.IntTable[(int)((U30)inlineCommand.Parameters[0]).Value]).Value;
hasMaxValue = true;
break;
case (byte)Op.PushDouble:
throw new Exception("Max stack has to be an integer constant.");
case (byte)Op.CallPropertyVoid:
name = NameUtil.ResolveMultiname(abc, (MultinameInfo)(abc.ConstantPool.MultinameTable[(int)((U30)inlineCommand.Parameters[0]).Value]));
if (inlineMaxStack == name)
{
parse = false;
}
else
{
throw new Exception("Malformed inline block. Method calls are not accepted ...");
}
break;
}
}
#if DEBUG
Console.WriteLine("[+] MaxStack marker parsed.");
#endif
if (hasMaxValue)
{
hasManualMaxStack = true;
manualMaxStackValue = maxStackValue;
}
patchBody = true;
}
#endregion
else
{
instructions.Add(command);
}
break;
default:
instructions.Add(command);
break;
}
}
if (patchBody)
{
//
// We have to patch this function ...
// Note: We do not change the initScopeDepth
//
#if DEBUG
Console.WriteLine("[i] Patching body (id: {0})", bodyId);
#endif
CompilerAs3c compAs3c = new CompilerAs3c();
compAs3c.Compile(abc, instructions, labels, false);
// Now .. only patch if we find a correct stack!
U30 maxStack;
if (!hasManualMaxStack)
{
maxStack = ByteCodeAnalyzer.CalcMaxStack(compAs3c.Code);
}
else
{
maxStack = (U30)manualMaxStackValue;
}
if (hasManualMaxStack || 0 == (ByteCodeAnalyzer.Flags & ByteCodeAnalyzer.InvalidStack))
{
MethodInfo method = (MethodInfo)abc.Methods[(int)body.Method.Value];
body.MaxStack = maxStack;
body.MaxScopeDepth = body.InitScopeDepth + ByteCodeAnalyzer.CalcScopeDepth(compAs3c.Code);
U30 minLocalCount = method.ParameterCount;
U30 maxLocalCount = ByteCodeAnalyzer.CalcLocalCount(compAs3c.Code);
if (maxLocalCount.Value > minLocalCount.Value)
{
body.LocalCount = ByteCodeAnalyzer.CalcLocalCount(compAs3c.Code);
}
//else <- we would have unused parameters in a function...
body.Code = compAs3c.Code;
}
else
{
//
// What else? We will display warnings automatically but what about
// telling the guy in which function he has an invalid stack?
//
}
#if DEBUG
Console.WriteLine("[+] Body patched");
#endif
}
}
private void PatchBody(Abc46 abc, MethodBodyInfo body, int bodyId)
{
AVM2Command command;
AVM2Command inlineCommand;
Dictionary<string, Label> labels = new Dictionary<string, Label>();
ArrayList instructions = new ArrayList();
Label label;
string labelId;
byte[] il = body.Code;
uint i = 0;
uint n = (uint)il.Length;
uint addr;
string name;
bool patchBody = false;
bool ignoreBody = false;
_labelUtil.Clear();
while (i < n)
{
addr = i;
if (_labelUtil.IsMarked(addr))
{
labelId = String.Format(":{0}:", _labelUtil.GetLabelAt(addr).id);
label = new Label(labelId);
labels.Add(labelId, label);
instructions.Add(label);
}
command = Translator.ToCommand(il[i++]);
if (null == command)
{
throw new Exception("Unknown opcode detected.");
}
i += command.ReadParameters(il, i);
switch (command.OpCode)
{
case (byte)Op.Label:
labelId = String.Format(":{0}:", _labelUtil.GetLabelAt(addr).id);
label = new Label(labelId);
labels.Add(labelId, label);
instructions.Add(label);
break;
case (byte)Op.IfEqual:
case (byte)Op.IfFalse:
case (byte)Op.IfGreaterEqual:
case (byte)Op.IfGreaterThan:
case (byte)Op.IfLessEqual:
case (byte)Op.IfLowerThan:
case (byte)Op.IfNotEqual:
case (byte)Op.IfNotGreaterEqual:
case (byte)Op.IfNotGreaterThan:
case (byte)Op.IfNotLowerEqual:
case (byte)Op.IfNotLowerThan:
case (byte)Op.IfStrictEqual:
case (byte)Op.IfStrictNotEqual:
case (byte)Op.IfTrue:
case (byte)Op.Jump:
S24 offset = (S24)command.Parameters[0];
command.Parameters[0] = String.Format(":{0}:", _labelUtil.GetLabelAt((uint)(addr + 1 + offset.Length + offset.Value)).id);
instructions.Add(command);
break;
case (byte)Op.GetLex:
name = NameUtil.ResolveMultiname(abc, (MultinameInfo)(abc.ConstantPool.MultinameTable[(int)((U30)command.Parameters[0]).Value]));
if ("public::Math" == name || "Math" == name)
patchBody = true;
instructions.Add(command);
break;
case (byte)Op.LookupSwitch:
ignoreBody = true;
instructions.Add(command);
break;
default:
instructions.Add(command);
break;
}
}
if (ignoreBody)
{
#if DEBUG
Console.WriteLine("[-] Have to ignore body because of lookupswitch ...");
#endif
}
if (patchBody && !ignoreBody)
{
//
// We have to patch this function ...
// Note: We do not change the initScopeDepth
//
#if DEBUG
Console.WriteLine("[i] Patching body (id: {0})", bodyId);
#endif
CompilerAs3c compAs3c = new CompilerAs3c();
compAs3c.Compile(abc, instructions, labels, true);
// Now .. only patch if we find a correct stack!
U30 maxStack = maxStack = ByteCodeAnalyzer.CalcMaxStack(compAs3c.Code);
if (0 == (ByteCodeAnalyzer.Flags & ByteCodeAnalyzer.InvalidStack))
{
MethodInfo method = (MethodInfo)abc.Methods[(int)body.Method.Value];
body.MaxStack = maxStack;
body.MaxScopeDepth = body.InitScopeDepth + ByteCodeAnalyzer.CalcScopeDepth(compAs3c.Code);
U30 minLocalCount = method.ParameterCount;
U30 maxLocalCount = ByteCodeAnalyzer.CalcLocalCount(compAs3c.Code);
if (maxLocalCount.Value > minLocalCount.Value)
{
body.LocalCount = ByteCodeAnalyzer.CalcLocalCount(compAs3c.Code);
}
//else <- we would have unused parameters in a function...
body.Code = compAs3c.Code;
}
else
{
//
// What else? We will display warnings automatically but what about
// telling the guy in which function he has an invalid stack?
//
}
#if DEBUG
Console.WriteLine("[+] Body patched");
#endif
}
}
protected override void FormatAbc(Abc46 abc46)
{
base.FormatAbc(abc46);
_abc = abc46;
_output.Add(";namespaces:\r\n");
for (int i = 0, n = _abc.ConstantPool.NamespaceTable.Count; i < n; ++i)
{
NamespaceInfo ns = (NamespaceInfo)_abc.ConstantPool.NamespaceTable[i];
string result = "";
switch (ns.Kind)
{
case NamespaceInfo.Namespace:
case NamespaceInfo.ExplicitNamespace:
//TODO implement this
//user defined
break;
case NamespaceInfo.PrivateNs:
result = "private";
break;
case NamespaceInfo.ProtectedNamespace:
result = "protected";
break;
case NamespaceInfo.StaticProtectedNs:
result = "protected$";
break;
case NamespaceInfo.PackageInternalNs:
result = "internal";
break;
case NamespaceInfo.PackageNamespace:
result = "public";
break;
default:
result = "*";
break;
//throw new VerifyException("Unexpected namespace kind.");
}
result += "::";
result += ((StringInfo)_abc.ConstantPool.StringTable[(int)ns.Name.Value]).ToString();
_output.Add(String.Format(";id{0}\t\t{1}\r\n", i, result));
}
_output.Add(";multinames:\r\n");
for (int i = 0, n = abc46.ConstantPool.MultinameTable.Count; i < n; ++i)
{
_output.Add(String.Format(";id{0}\t\t{1}\r\n", i, NameUtil.ResolveMultiname(abc46, i)));
}
_output.Add(";strings\r\n");
for (int i = 0, n = abc46.ConstantPool.StringTable.Count; i < n; ++i)
{
_output.Add(String.Format(";id{0}\t\t{1}\r\n", i, ((StringInfo)abc46.ConstantPool.StringTable[i]).ToString()));
}
for (int i = 0, n = _abc.Scripts.Count; i < n; ++i)
{
FormatScript(i);
}
}
protected virtual void FormatAbc(Abc46 abc46)
{
}
public void Compile(Abc46 abc, ArrayList instructions, Dictionary<string, Label> labels, bool patchMath)
{
#if DEBUG
//Console.WriteLine("[i] Starting to compile method body ...");
#endif
//
// Create buffer
//
MemoryStream buffer = new MemoryStream();
BinaryWriter output = new BinaryWriter(buffer);
//
// Convert compiler instructions to IL.
//
Instruction instruction;
Label label;
List<ReplaceInformation> replaceList = new List<ReplaceInformation>();
bool hasLocalMath = false;
uint mathRegister = 0;
U30 mathMultiName = new U30();
AVM2Command mathCommand = null;
AVM2Command lastCommand = null;
for (int i = 0, n = instructions.Count; i < n; ++i)
{
if (instructions[i] is Label)
{
label = (Label)instructions[i];
label.Address = (uint)buffer.Position;
if (!label.Referenced)
{
output.Write((byte)Op.Label);
}
}
else if (instructions[i] is AVM2Command)
{
AVM2Command command = (AVM2Command)instructions[i];
output.Write((byte)command.OpCode);
switch (command.OpCode)
{
case (byte)Op.IfEqual:
case (byte)Op.IfFalse:
case (byte)Op.IfGreaterEqual:
case (byte)Op.IfGreaterThan:
case (byte)Op.IfLessEqual:
case (byte)Op.IfLowerThan:
case (byte)Op.IfNotEqual:
case (byte)Op.IfNotGreaterEqual:
case (byte)Op.IfNotGreaterThan:
case (byte)Op.IfNotLowerEqual:
case (byte)Op.IfNotLowerThan:
case (byte)Op.IfStrictEqual:
case (byte)Op.IfStrictNotEqual:
case (byte)Op.IfTrue:
case (byte)Op.Jump:
string labelId = (string)command.Parameters[0];
try
{
label = labels[labelId];
}
catch(Exception)
{
Console.WriteLine("[-] WARNING: Jumping to an unknown label");
continue;
}
if (label.HasAddress)
{
int offset = (int)(label.Address - ((uint)buffer.Position + 3));
Primitives.WriteS24(output, offset);
}
else
{
replaceList.Add(new ReplaceInformation((uint)buffer.Position, label, false));
Primitives.WriteS24(output, 0);
}
label.Referenced = true;
break;
case (byte)Op.GetLex:
if (patchMath)
{
string lexName = NameUtil.ResolveMultiname(abc, (MultinameInfo)(abc.ConstantPool.MultinameTable[(int)((U30)command.Parameters[0]).Value]));
//
// If getlex public::Math is called we will repalce it with
// a get_local N where Math will be stored.
//
if (("public::Math" == lexName || "Math" == lexName) && (null != lastCommand) && (lastCommand.OpCode != (byte)Op.SetLocal))
{
#if DEBUG
Console.WriteLine("[i] Found call to Math class ...");
#endif
if (!hasLocalMath)
{
mathMultiName = (U30)command.Parameters[0];
U30 currentMaxLocal = ByteCodeAnalyzer.CalcLocalCount(instructions);
#if DEBUG
Console.WriteLine(String.Format("[i] Math register will be {0}", currentMaxLocal.Value));
#endif
if (currentMaxLocal.Value < 4)
{
int val = (int)currentMaxLocal.Value;
mathCommand = Translator.ToCommand((byte)(0xd0 + val));
}
else
{
mathCommand = Translator.ToCommand((byte)Op.GetLocal);
mathCommand.Parameters.Add(currentMaxLocal);
}
mathRegister = currentMaxLocal.Value;
hasLocalMath = true;
}
output.Seek(-1, SeekOrigin.Current);
output.Write((byte)mathCommand.OpCode);
if (mathCommand.OpCode == (byte)Op.GetLocal)
mathCommand.WriteParameters(output);
}
else
{
command.WriteParameters(output);
}
}
else
{
command.WriteParameters(output);
}
break;
default:
command.WriteParameters(output);
break;
}
lastCommand = command;
}
else if (instructions[i] is Instruction)
{
instruction = (Instruction)instructions[i];
output.Write(instruction.Command.OpCode);
switch (instruction.Command.OpCode)
{
case (byte)Op.PushShort:
Primitives.WriteU30(output, (U30)Convert.ToInt32(instruction.Arguments[0]));
break;
case (byte)Op.AsType:
case (byte)Op.Coerce:
case (byte)Op.DeleteProperty:
case (byte)Op.FindProperty:
case (byte)Op.FindPropertyStrict:
case (byte)Op.GetDescendants:
case (byte)Op.GetLex:
case (byte)Op.GetProperty:
case (byte)Op.GetSuper:
case (byte)Op.InitProperty:
case (byte)Op.IsType:
case (byte)Op.SetProperty:
case (byte)Op.PushNamespace:
Primitives.WriteU30(output, NameUtil.GetMultiname(abc, instruction.Arguments[0]));
break;
case (byte)Op.CallProperty:
case (byte)Op.CallPropertyLex:
case (byte)Op.CallPropertyVoid:
case (byte)Op.CallSuper:
case (byte)Op.CallSuperVoid:
case (byte)Op.ConstructProperty:
Primitives.WriteU30(output, NameUtil.GetMultiname(abc, instruction.Arguments[0]));
Primitives.WriteU30(output, Convert.ToUInt32(instruction.Arguments[1]));
break;
case (byte)Op.NewClass:
Primitives.WriteU30(output, NameUtil.GetClass(abc, instruction.Arguments[0]));
break;
case (byte)Op.PushDouble:
Primitives.WriteU30(output, (U30)abc.ConstantPool.ResolveDouble(Convert.ToDouble(instruction.Arguments[0].Replace('.', ','))));
break;
case (byte)Op.PushInt:
Primitives.WriteU30(output, (U30)abc.ConstantPool.ResolveInt((S32)Convert.ToInt32(instruction.Arguments[0])));
break;
case (byte)Op.PushUInt:
Primitives.WriteU30(output, (U30)abc.ConstantPool.ResolveUInt((U32)Convert.ToUInt32(instruction.Arguments[0])));
break;
case (byte)Op.DebugFile:
case (byte)Op.PushString:
if (instruction.Arguments[0].StartsWith("\"") && instruction.Arguments[0].EndsWith("\""))//TODO fix ugly hack
{
Primitives.WriteU30(output, (U30)abc.ConstantPool.ResolveString(instruction.Arguments[0].Substring(1, instruction.Arguments[0].Length - 2)));
}
else
{
Primitives.WriteU30(output, (U30)abc.ConstantPool.ResolveString(instruction.Arguments[0]));
}
break;
case (byte)Op.IfEqual:
case (byte)Op.IfFalse:
case (byte)Op.IfGreaterEqual:
case (byte)Op.IfGreaterThan:
case (byte)Op.IfLessEqual:
case (byte)Op.IfLowerThan:
case (byte)Op.IfNotEqual:
case (byte)Op.IfNotGreaterEqual:
case (byte)Op.IfNotGreaterThan:
case (byte)Op.IfNotLowerEqual:
case (byte)Op.IfNotLowerThan:
case (byte)Op.IfStrictEqual:
case (byte)Op.IfStrictNotEqual:
case (byte)Op.IfTrue:
case (byte)Op.Jump:
//
// Solve label offset
//
string labelId = null;
try
{
labelId = instruction.Arguments[0];
}
catch (Exception)
{
Console.WriteLine("[-] WARNING: Jumping to an unknown label");
continue;
}
//
// Make sure the label exsists.
//
if (!labels.ContainsKey(labelId))
{
#if DEBUG
Console.WriteLine("[-] Label \"{0}\" is missing ...", labelId);
#endif
throw new InstructionException(InstructionException.Type.LabelMissing, instruction.DebugInfo);
}
label = labels[labelId];
if (label.HasAddress)
{
//
// We already have the label address. This is a negative jump offset.
//
int offset = (int)(label.Address - ((uint)buffer.Position + 3));
Primitives.WriteS24(output, offset);
}
else
{
//
// We do not know the label address. This is a positive jump offset.
// Mark label to be solved afterwards and write a placeholder ...
//
replaceList.Add(new ReplaceInformation((uint)buffer.Position, label, false));
Primitives.WriteS24(output, 0);
}
label.Referenced = true;
break;
default:
if (0 < instruction.Command.ParameterCount)
{
try
{
foreach (string argument in instruction.Arguments)
{
output.Write((byte)Convert.ToByte(argument));
}
}
catch (Exception)
{
throw new InstructionException(InstructionException.Type.UnknownType, instruction.DebugInfo);
}
}
break;
}
lastCommand = instruction.Command;
}
}
int labelOffset = 0;
#region Add automatically generated code
//
// Add local variable containing Math
//
if (patchMath && hasLocalMath)
{
#if DEBUG
Console.WriteLine("[i] Body has local Math");
#endif
int mathAddress = 2;
int lastOpCode = -1;
int opCode = -1;
long lastPosition = output.BaseStream.Position;
output.BaseStream.Seek(0, SeekOrigin.Begin);
while(((opCode = output.BaseStream.ReadByte()) != -1))
{
if (lastOpCode == (byte)Op.GetLocal0 && opCode == (byte)Op.PushScope)
{
break;
}
lastOpCode = opCode;
}
mathAddress = (int)output.BaseStream.Position;
output.BaseStream.Seek(lastPosition, SeekOrigin.Begin);
#if DEBUG
//Console.WriteLine("[i] Dump Before:");
//DebugUtil.Dump((MemoryStream)output.BaseStream);
#endif
InsertByte(output, mathAddress);
InsertByte(output, mathAddress);
labelOffset += 2;
int byteCoundMulti = 0;
while (byteCoundMulti < mathMultiName.Length)
{
byteCoundMulti++;
labelOffset++;
InsertByte(output, mathAddress);
}
if (mathRegister > 3)
{
#if DEBUG
Console.WriteLine("[i] Adding extra register");
#endif
int byteCount = 0;
while (byteCount < ((U30)mathRegister).Length+1)
{
++byteCount;
++labelOffset;
InsertByte(output, mathAddress);
}
}
output.Seek(mathAddress, SeekOrigin.Begin);
AVM2Command getLexCommand = Translator.ToCommand((byte)Op.GetLex);
getLexCommand.Parameters.Add(mathMultiName);
output.Write((byte)getLexCommand.OpCode);
getLexCommand.WriteParameters(output);
if (mathRegister > 3)
{
AVM2Command setLocalCommand = Translator.ToCommand((byte)Op.SetLocal);
setLocalCommand.Parameters.Add((U30)mathRegister);
output.Write((byte)setLocalCommand.OpCode);
setLocalCommand.WriteParameters(output);
}
else
{
output.Write((byte)(0xd4 + mathRegister));
}
#if DEBUG
//Console.WriteLine("[i] Dump After:");
//DebugUtil.Dump((MemoryStream)output.BaseStream);
#endif
output.Seek(0, SeekOrigin.End);
output.Flush();
}
#endregion
//
// Solve remainig labels
//
for (int i = 0, n = replaceList.Count; i < n; ++i)
{
ReplaceInformation replaceInfo = replaceList[i];
label = replaceInfo.label;
if (!label.Referenced || !label.HasAddress)
{
Console.WriteLine("[-] Warning: Label {0} has never been defined or used ...", label.Identifier);
continue;
}
if (replaceInfo.lookUpSwitch)
{
//
// LookUpSwitch with special offset calculation
//
throw new Exception("IMPLEMENT ME!");
}
else
{
//
// Simple jump
//
int offset = (int)(label.Address - ((uint)replaceInfo.address + 3));
buffer.Seek(replaceInfo.address + labelOffset, SeekOrigin.Begin);
Primitives.WriteS24(output, offset);
}
}
//
// Convert stream to byte[]
//
buffer.Seek(0, SeekOrigin.Begin);
BinaryReader reader = new BinaryReader(buffer);
_code = reader.ReadBytes((int)buffer.Length);
//
// Clean up
//
reader.Close();
buffer.Dispose();
#if DEBUG
//Console.WriteLine("[i] Done compiling method body ...");
#endif
}
