public ByteBuffer PatchRawMethodBody(MethodDefinition method, CodeWriter writer, out MethodSymbols symbols)
{
var buffer = new ByteBuffer ();
symbols = new MethodSymbols (method.Name);
this.method = method;
reader.context = method;
MoveTo (method.RVA);
var flags = ReadByte ();
MetadataToken local_var_token;
switch (flags & 0x3) {
case 0x2: // tiny
buffer.WriteByte (flags);
local_var_token = MetadataToken.Zero;
symbols.code_size = flags >> 2;
PatchRawCode (buffer, symbols.code_size, writer);
break;
case 0x3: // fat
base.position--;
PatchRawFatMethod (buffer, symbols, writer, out local_var_token);
break;
default:
throw new NotSupportedException ();
}
var symbol_reader = reader.module.SymbolReader;
if (symbol_reader != null && writer.metadata.write_symbols) {
symbols.method_token = GetOriginalToken (writer.metadata, method);
symbols.local_var_token = local_var_token;
symbol_reader.Read (symbols);
}
return buffer;
}
void PatchRawCode(ByteBuffer buffer, int code_size, CodeWriter writer)
{
var metadata = writer.metadata;
buffer.WriteBytes (ReadBytes (code_size));
var end = buffer.position;
buffer.position -= code_size;
while (buffer.position < end) {
OpCode opcode;
var il_opcode = buffer.ReadByte ();
if (il_opcode != 0xfe) {
opcode = OpCodes.OneByteOpCode [il_opcode];
} else {
var il_opcode2 = buffer.ReadByte ();
opcode = OpCodes.TwoBytesOpCode [il_opcode2];
}
switch (opcode.OperandType) {
case OperandType.ShortInlineI:
case OperandType.ShortInlineBrTarget:
case OperandType.ShortInlineVar:
case OperandType.ShortInlineArg:
buffer.position += 1;
break;
case OperandType.InlineVar:
case OperandType.InlineArg:
buffer.position += 2;
break;
case OperandType.InlineBrTarget:
case OperandType.ShortInlineR:
case OperandType.InlineI:
buffer.position += 4;
break;
case OperandType.InlineI8:
case OperandType.InlineR:
buffer.position += 8;
break;
case OperandType.InlineSwitch:
var length = buffer.ReadInt32 ();
buffer.position += length * 4;
break;
case OperandType.InlineString:
var @string = GetString (new MetadataToken (buffer.ReadUInt32 ()));
buffer.position -= 4;
buffer.WriteUInt32 (
new MetadataToken (
TokenType.String,
metadata.user_string_heap.GetStringIndex (@string)).ToUInt32 ());
break;
case OperandType.InlineSig:
var call_site = GetCallSite (new MetadataToken (buffer.ReadUInt32 ()));
buffer.position -= 4;
buffer.WriteUInt32 (writer.GetStandAloneSignature (call_site).ToUInt32 ());
break;
case OperandType.InlineTok:
case OperandType.InlineType:
case OperandType.InlineMethod:
case OperandType.InlineField:
var provider = reader.LookupToken (new MetadataToken (buffer.ReadUInt32 ()));
buffer.position -= 4;
buffer.WriteUInt32 (metadata.LookupToken (provider).ToUInt32 ());
break;
}
}
}
void PatchRawFatMethod(ByteBuffer buffer, MethodSymbols symbols, CodeWriter writer, out MetadataToken local_var_token)
{
var flags = ReadUInt16 ();
buffer.WriteUInt16 (flags);
buffer.WriteUInt16 (ReadUInt16 ());
symbols.code_size = ReadInt32 ();
buffer.WriteInt32 (symbols.code_size);
local_var_token = ReadToken ();
if (local_var_token.RID > 0) {
var variables = symbols.variables = ReadVariables (local_var_token);
buffer.WriteUInt32 (variables != null
? writer.GetStandAloneSignature (symbols.variables).ToUInt32 ()
: 0);
} else
buffer.WriteUInt32 (0);
PatchRawCode (buffer, symbols.code_size, writer);
if ((flags & 0x8) != 0)
PatchRawSection (buffer, writer.metadata);
}
public ByteBuffer PatchRawMethodBody(MethodDefinition method, CodeWriter writer, out int code_size, out MetadataToken local_var_token)
{
var position = MoveTo (method);
var buffer = new ByteBuffer ();
var flags = ReadByte ();
switch (flags & 0x3) {
case 0x2: // tiny
buffer.WriteByte (flags);
local_var_token = MetadataToken.Zero;
code_size = flags >> 2;
PatchRawCode (buffer, code_size, writer);
break;
case 0x3: // fat
Advance (-1);
PatchRawFatMethod (buffer, writer, out code_size, out local_var_token);
break;
default:
throw new NotSupportedException ();
}
MoveBackTo (position);
return buffer;
}
void Initialize()
{
m_mdWriter = new MetadataWriter (
m_mod.Assembly,
m_mod.Image.MetadataRoot,
m_structureWriter.Assembly.Kind,
m_mod.Assembly.Runtime,
m_structureWriter.GetWriter ());
m_tableWriter = m_mdWriter.GetTableVisitor ();
m_rowWriter = m_tableWriter.GetRowVisitor () as MetadataRowWriter;
m_sigWriter = new SignatureWriter (m_mdWriter);
m_codeWriter = new CodeWriter (this, m_mdWriter.CilWriter);
m_typeDefStack = new ArrayList ();
m_methodStack = new ArrayList ();
m_fieldStack = new ArrayList ();
m_genericParamStack = new ArrayList ();
m_typeSpecCache = new Hashtable ();
m_methodIndex = 1;
m_fieldIndex = 1;
m_paramIndex = 1;
m_eventIndex = 1;
m_propertyIndex = 1;
m_constWriter = new MemoryBinaryWriter ();
}
public static byte[] ToBytes(MethodDefinition method)
{
CodeWriter cw = new CodeWriter(method);
return cw.WriteMethodBody();
}
void PatchRawCode(ByteBuffer buffer, int code_size, CodeWriter writer)
{
var metadata = writer.metadata;
buffer.WriteBytes(ReadBytes(code_size));
var end = buffer.position;
buffer.position -= code_size;
while (buffer.position < end)
{
OpCode opcode;
var il_opcode = buffer.ReadByte();
if (il_opcode != 0xfe)
{
opcode = OpCodes.OneByteOpCode[il_opcode];
}
else
{
var il_opcode2 = buffer.ReadByte();
opcode = OpCodes.TwoBytesOpCode[il_opcode2];
}
switch (opcode.OperandType)
{
case OperandType.ShortInlineI:
case OperandType.ShortInlineBrTarget:
case OperandType.ShortInlineVar:
case OperandType.ShortInlineArg:
buffer.position += 1;
break;
case OperandType.InlineVar:
case OperandType.InlineArg:
buffer.position += 2;
break;
case OperandType.InlineBrTarget:
case OperandType.ShortInlineR:
case OperandType.InlineI:
buffer.position += 4;
break;
case OperandType.InlineI8:
case OperandType.InlineR:
buffer.position += 8;
break;
case OperandType.InlineSwitch:
var length = buffer.ReadInt32();
buffer.position += length * 4;
break;
case OperandType.InlineString:
var @string = GetString(new MetadataToken(buffer.ReadUInt32()));
buffer.position -= 4;
buffer.WriteUInt32(
new MetadataToken(
TokenType.String,
metadata.user_string_heap.GetStringIndex(@string)).ToUInt32());
break;
case OperandType.InlineSig:
var call_site = GetCallSite(new MetadataToken(buffer.ReadUInt32()));
buffer.position -= 4;
buffer.WriteUInt32(writer.GetStandAloneSignature(call_site).ToUInt32());
break;
case OperandType.InlineTok:
case OperandType.InlineType:
case OperandType.InlineMethod:
case OperandType.InlineField:
var provider = reader.LookupToken(new MetadataToken(buffer.ReadUInt32()));
buffer.position -= 4;
buffer.WriteUInt32(metadata.LookupToken(provider).ToUInt32());
break;
}
}
}
private void WriteOperand(Instruction instruction)
{
OpCode opCode = instruction.opcode;
OperandType operandType = opCode.OperandType;
if (operandType == OperandType.InlineNone)
{
return;
}
object obj = instruction.operand;
if (obj == null)
{
throw new ArgumentException();
}
switch (operandType)
{
case OperandType.InlineBrTarget:
{
Instruction instruction1 = (Instruction)obj;
base.WriteInt32(this.GetTargetOffset(instruction1) - (instruction.Offset + opCode.Size + 4));
return;
}
case OperandType.InlineField:
case OperandType.InlineMethod:
case OperandType.InlineTok:
case OperandType.InlineType:
{
this.WriteMetadataToken(this.metadata.LookupToken((IMetadataTokenProvider)obj));
return;
}
case OperandType.InlineI:
{
base.WriteInt32((int)obj);
return;
}
case OperandType.InlineI8:
{
base.WriteInt64((long)obj);
return;
}
case OperandType.InlineNone:
case OperandType.InlinePhi:
{
throw new ArgumentException();
}
case OperandType.InlineR:
{
base.WriteDouble((double)obj);
return;
}
case OperandType.InlineSig:
{
this.WriteMetadataToken(this.GetStandAloneSignature((Mono.Cecil.CallSite)obj));
return;
}
case OperandType.InlineString:
{
this.WriteMetadataToken(new MetadataToken(Mono.Cecil.TokenType.String, this.GetUserStringIndex((string)obj)));
return;
}
case OperandType.InlineSwitch:
{
Instruction[] instructionArray = (Instruction[])obj;
base.WriteInt32((int)instructionArray.Length);
int offset = instruction.Offset + opCode.Size + 4 * ((int)instructionArray.Length + 1);
for (int i = 0; i < (int)instructionArray.Length; i++)
{
base.WriteInt32(this.GetTargetOffset(instructionArray[i]) - offset);
}
return;
}
case OperandType.InlineVar:
{
base.WriteInt16((short)CodeWriter.GetVariableIndex((VariableDefinition)obj));
return;
}
case OperandType.InlineArg:
{
base.WriteInt16((short)this.GetParameterIndex((ParameterDefinition)obj));
return;
}
case OperandType.ShortInlineBrTarget:
{
Instruction instruction2 = (Instruction)obj;
base.WriteSByte((sbyte)(this.GetTargetOffset(instruction2) - (instruction.Offset + opCode.Size + 1)));
return;
}
case OperandType.ShortInlineI:
{
if (opCode == OpCodes.Ldc_I4_S)
{
base.WriteSByte((sbyte)obj);
return;
}
base.WriteByte((byte)obj);
return;
}
case OperandType.ShortInlineR:
{
base.WriteSingle((float)obj);
return;
}
case OperandType.ShortInlineVar:
{
base.WriteByte((byte)CodeWriter.GetVariableIndex((VariableDefinition)obj));
return;
}
case OperandType.ShortInlineArg:
{
base.WriteByte((byte)this.GetParameterIndex((ParameterDefinition)obj));
return;
}
default:
{
throw new ArgumentException();
}
}
}