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);
}
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;
}
}
}
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;
}
