public Opcode(string name, object paramval)
{
Name = name;
ParamVal = paramval;
Prefix = null;
IsPrefix = false;
NeedsLabel = false;
}
Opcode OpcodeNoParamVal(string s)
{
var NewOp = new Opcode(s);
MakeLabel(NewOp);
return NewOp;
}
public Opcode(string name)
{
Name = name;
Prefix = null;
IsPrefix = false;
NeedsLabel = false;
}
Opcode OpcodeFourByte(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte[] b = new byte[4];
for (int k = 0; k < 4; k++)
{
b[k] = IL[pos];
pos++;
}
int i = BitConverter.ToInt32(b,0);
var NewOp = new Opcode(s,i);
MakeLabel(NewOp);
return NewOp;
}
Opcode OpcodeIndx(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte[] b = new byte[2];
for (int k = 0; k < 2; k++)
{
b[k] = IL[pos];
pos++;
}
short i = BitConverter.ToInt16(b,0);
var ind = new Index("V_" + i);
var NewOp = new Opcode(s,i);
MakeLabel(NewOp);
return NewOp;
}
void MakeLabel(Opcode op)
{
op.Label = string.Format("IL_{0:x4}", pos1);
}
Opcode OpcodeEightByte(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte[] b = new byte[8];
for (int k = 0; k < 8; k++)
{
b[k] = IL[pos];
pos++;
}
long i = BitConverter.ToInt64(b,0);
var NewOp = new Opcode(s,i);
MakeLabel(NewOp);
return NewOp;
}
Opcode OpcodeTok(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte[] b = new byte[4];
for (int k = 0; k < 4; k++)
{
b[k] = IL[pos];
pos++;
}
// This calls the appropriate Opcode method depending on what sort of parameter we're dealing with.
// This is determined by the least byte of the byte[]
if (b[3] == 4)
{
pos -=4;
return OpcodeFld(s);
}
if ((b[3] == 6)||(b[3] == 10))
{
pos -=4;
return OpcodeMeth(s);
}
if ((b[3] == 1)||(b[3]==2) || (b[3]==0x1b)) //0x1b is testspec.
{
pos -=4;
return OpcodeType(s);
}
Opcode NewOp = new Opcode(s,b);
MakeLabel(NewOp);
return NewOp;
}
Opcode OpcodeTwoByte(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte[] b = new byte[2];
for (int k = 0; k < 2; k++)
{
b[k] = IL[pos];
pos++;
}
ushort i = BitConverter.ToUInt16(b,0);
var NewOp = new Opcode(s,i);
MakeLabel(NewOp); // This labels the Opcode
return NewOp;
}
Opcode OpcodeTarget(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte[] b = new byte[4];
for (int k = 0; k < 4; k++)
{
b[k] = IL[pos];
pos++;
}
int l = BitConverter.ToInt32(b,0);
int TPos = l + pos;
string s1 =string.Format("IL_{0:x4}", TPos);
var NewOp = new Opcode(s,new Target(s1));
MakeLabel(NewOp);
return NewOp;
}
Opcode OpcodeTargetS(string s)
{
// This gets the parameter (stored as b) from the byte[]
sbyte k = (sbyte)IL[pos];
pos++;
int b = (int)((sbyte)k + (int)pos);
string s1 =string.Format("IL_{0:x4}", b);
var NewOp = new Opcode(s,new Target(s1));
MakeLabel(NewOp);
return NewOp;
}
Opcode OpcodeSwitch(string s)
{
// This gets the number of parameters (stored as b) from the byte[]
// Each parameter is then added to the ArrayList T
var T = new ArrayList();
byte[] b = new byte[4];
for (int k = 0; k < 4; k++)
{
b[k] = IL[pos];
pos++;
}
int i = BitConverter.ToInt32(b,0); // This tells us how many parameters to expect.
for (int k = 0; k < i; k++) // Each parameter will be a four-byte offset
{
for (int k1 = 0; k1 < 4; k1++)
{
b[k1] = IL[pos];
pos++;
}
int j = BitConverter.ToInt32(b,0);
string s1 =string.Format("IL_{0:x4}", pos1 + j + 4*i + 5);
T.Add(new Target(s1));
}
var NewOp = new Opcode(s,T);
MakeLabel(NewOp);
return NewOp;
}
Opcode OpcodeSig(string s)
{
// TODO : Resolve this token!
// This gets the parameter (stored as b) from the byte[]
byte[] b = new byte[4];
for (int k = 0; k < 4; k++)
{
b[k] = IL[pos];
pos++;
}
var NewOp = new Opcode(s,b);
MakeLabel(NewOp);
return NewOp;
}
Opcode OpcodeOneByte(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte b = IL[pos];
pos++;
var NewOp = new Opcode(s,b);
MakeLabel(NewOp);
return NewOp;
}
public Opcode(string name, ArrayList paramlist)
{
Name = name;
ParamVal = paramlist;
Prefix = null;
IsPrefix = false;
NeedsLabel = false;
}
Opcode OpcodeType(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte[] b = new byte[4];
for (int k = 0; k < 4; k++)
{
b[k] = IL[pos];
pos++;
}
Type RetType = (Type)curModule.ResolveMember(BitConverter.ToInt32(b,0));
var NewOp = new Opcode(s,RetType);
MakeLabel(NewOp);
return NewOp;
}
public Label ToLabel(ArrayList Opcodes)
{
Opcode Op1 = new Opcode();
foreach(Opcode OP in Opcodes)
{
if (Name == OP.Label) return OP.ILLabel;
}
return Op1.ILLabel;
}
Opcode Prefix(string s)
{
var OpPre = new Opcode(s);
MakeLabel(OpPre); // This labels the Opcode
OpPre.IsPrefix = true; // Here we designate the Opcode as a prefix
Opcode Next = GetOpcode();
Next.Label = "";
Next.Prefix = OpPre;
return Next;
}
void MakeLabel(Opcode op, bool label)
{
if (!label)
op.Label = "IL_XXXX";
else MakeLabel(op);
}
Opcode PrefixParamVal(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte b = IL[pos];
pos++;
var OpPre = new Opcode(s,b);
MakeLabel(OpPre); // This labels the Opcode
OpPre.IsPrefix = true; // Here we designate the Opcode as a prefix
Opcode Next = GetOpcode();
Next.Label = "";
Next.Prefix = OpPre;
return Next;
}
Opcode OpcodeFld(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte[] b = new byte[4];
for (int k = 0; k < 4; k++)
{
b[k] = IL[pos];
pos++;
}
// We have to temporarily take out stfld field here.
// the stfld's order must be fixed up
FieldInfo ReturnField = (FieldInfo)curModule.ResolveMember(BitConverter.ToInt32(b,0));
var NewOp = new Opcode(s,ReturnField);
if (s.Equals("stfld"))
{
StfldList.Add(NewOp.ParamVal);
return NewOp;
}
else
{
MakeLabel(NewOp);
return NewOp;
}
}
public ILReader(MethodBase InputMethod, FieldInfo[] FieldsInModule, MethodBase[] MethodsInModule, Assembly currentAssm)
{
workingAssm = currentAssm;
MethodOpcodes = new ArrayList();
InputMeth = InputMethod;
ExceptionHandlers = new ArrayList();
if (InputMethod == null)
{
Console.WriteLine("Error, input method is not specified, can not continue");
return;
}
methodBody = InputMethod.GetMethodBody();
curModule = InputMethod.DeclaringType.Module;
pos = 0;
pos1 = 0;
IL = methodBody.GetILAsByteArray();
IList<ExceptionHandlingClause> ehClauses = methodBody.ExceptionHandlingClauses;
foreach( ExceptionHandlingClause ehclause in ehClauses )
{
ExceptionHandlers.Add(new ExceptionInstruction(ehclause.TryOffset,ExceptionHandler.Try,null));
switch (ehclause.Flags)
{
//case 0:
case ExceptionHandlingClauseOptions.Clause:
ExceptionHandlers.Add(new ExceptionInstruction(ehclause.HandlerOffset,ExceptionHandler.Catch,ehclause.CatchType));
ExceptionHandlers.Add(new ExceptionInstruction(ehclause.HandlerOffset+ehclause.HandlerLength,ExceptionHandler.EndException,null));
break;
//case 1:
case ExceptionHandlingClauseOptions.Filter:
ExceptionHandlers.Add(new ExceptionInstruction(ehclause.FilterOffset,ExceptionHandler.Filter,null));
ExceptionHandlers.Add(new ExceptionInstruction(ehclause.HandlerOffset,ExceptionHandler.EndFilter,null));
ExceptionHandlers.Add(new ExceptionInstruction(ehclause.HandlerOffset+ehclause.HandlerLength,ExceptionHandler.EndException,null));
break;
//case 2:
case ExceptionHandlingClauseOptions.Finally:
ExceptionHandlers.Add(new ExceptionInstruction(ehclause.HandlerOffset,ExceptionHandler.Finally,null));
ExceptionHandlers.Add(new ExceptionInstruction(ehclause.HandlerOffset+ehclause.HandlerLength,ExceptionHandler.EndException,null));
break;
//case 4:
case ExceptionHandlingClauseOptions.Fault:
ExceptionHandlers.Add(new ExceptionInstruction(ehclause.HandlerOffset,ExceptionHandler.Fault,null));
ExceptionHandlers.Add(new ExceptionInstruction(ehclause.HandlerOffset+ehclause.HandlerLength,ExceptionHandler.EndException,null));
break;
}
}
// populate opcode
Opcode Op = GetOpcode();
while (Op.Name != "") // This cycles through all the Opcodes
{
if (Op.Name != "stfld")
MethodOpcodes.Add(Op);
Op = GetOpcode();
}
// sort the stfld opcodes and output
// this will make the opcode invalid for run.
// but out purpose is simply compare the assemblies.
StfldList.Sort(new StringCompare());
foreach (object i in StfldList)
{
Opcode temp = new Opcode("stfld", i);
MakeLabel(temp, false);
MethodOpcodes.Add(temp);
}
}
Opcode OpcodeFourByteF(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte[] b = new byte[8];
for (int k = 0; k < 4; k++)
{
b[k] = IL[pos];
pos++;
}
var NewOp = new Opcode(s,BitConverter.ToDouble(b,0));
MakeLabel(NewOp); // This labels the Opcode
return NewOp;
}
public Opcode()
{
ParamVal = null;
Prefix = null;
IsPrefix = false;
NeedsLabel = false;
}
Opcode OpcodeIndxS(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte b = IL[pos];
pos++;
var ind = new Index("V_" + b);
var NewOp = new Opcode(s,b);
MakeLabel(NewOp);
return NewOp;
}
Opcode OpcodeMeth(string s)
{
// This gets the parameter (stored as b) from the byte[]
byte[] b = new byte[4];
Array.Copy(IL, pos, b, 0, 4);
pos+=4;
MethodBase mbase = (MethodBase)curModule.ResolveMember(BitConverter.ToInt32(b,0));
var NewOp = new Opcode(s, mbase);
NewOp.workingAssm = this.workingAssm;
NewOp.workingType = this.InputMeth.DeclaringType;
MakeLabel(NewOp); // This labels the Opcode
return NewOp;
}
