private void SerializeMetadata(ByteBufferRef buf, int cursor)
{
Deserializer.WriteULong(HeaderMagic, buf, cursor);
cursor += sizeof(ulong);
var hmac = CalculateHMAC(DataPageOffset, FileSize, Signatures);
buf.CopyFrom(cursor, hmac);
cursor += HMACSize;
Deserializer.WriteInt(DataPageOffset, buf, cursor);
cursor += sizeof(int);
Deserializer.WriteUInt(FileSize, buf, cursor);
cursor += sizeof(uint);
Deserializer.WriteInt(Signatures.Length, buf, cursor);
cursor += sizeof(int);
buf.CopyFrom(cursor, Signatures);
}
public void Write(ByteBufferRef buf, int offset)
{
Contract.Requires(offset >= 0);
Contract.Requires(offset + Size <= buf.Length);
Deserializer.WriteUInt(HandleOrPtr.Value.ToUInt32(), buf, offset); offset += sizeof(uint);
Deserializer.WriteUInt(cookie.Value.ToUInt32(), buf, offset); offset += sizeof(uint);
Deserializer.WriteUInt(code, buf, offset); offset += sizeof(uint);
Deserializer.WriteUInt(flags, buf, offset); offset += sizeof(uint);
Deserializer.WriteUInt(sender_pid, buf, offset); offset += sizeof(uint);
Deserializer.WriteUInt(sender_euid, buf, offset); offset += sizeof(uint);
Deserializer.WriteUInt(data_size, buf, offset); offset += sizeof(uint);
Deserializer.WriteUInt(offsets_size, buf, offset); offset += sizeof(uint);
Deserializer.WriteUInt(data_buffer.Value.ToUInt32(), buf, offset); offset += sizeof(uint);
Deserializer.WriteUInt(data_offsets.Value.ToUInt32(), buf, offset); offset += sizeof(uint);
}
internal int Marshal(UserPtr writeBuf, int size)
{
if (size < 0 || size > buf.Length)
{
return(-ErrorCode.EINVAL);
}
ReadCursor = 0;
// Copy the full data into the buffer, but don't increment the read pointer yet.
var r = writeBuf.Read(current, buf, size);
if (r != 0)
{
return(-1);
}
// Advance the cursor
WriteCursor = size;
// parse the command
while (ReadCursor < size)
{
if (ReadCursor + sizeof(uint) > buf.Length)
{
return(-ErrorCode.ENOMEM);
}
var cmd = Deserializer.ReadUInt(buf, ReadCursor);
ReadCursor += sizeof(uint);
switch (cmd)
{
case BinderINode.BC_INCREFS:
case BinderINode.BC_ACQUIRE:
case BinderINode.BC_RELEASE:
case BinderINode.BC_DECREFS:
ReadCursor += sizeof(int);
break;
case BinderINode.BC_INCREFS_DONE:
case BinderINode.BC_ACQUIRE_DONE:
case BinderINode.BC_REQUEST_DEATH_NOTIFICATION:
case BinderINode.BC_CLEAR_DEATH_NOTIFICATION:
ReadCursor += Pointer.Size * 2;
break;
case BinderINode.BC_ATTEMPT_ACQUIRE:
case BinderINode.BC_ACQUIRE_RESULT:
// Unimplemented in Android IPC
return(-ErrorCode.EINVAL);
case BinderINode.BC_FREE_BUFFER:
{
if (ReadCursor + sizeof(uint) > buf.Length)
{
return(-ErrorCode.ENOMEM);
}
var addr = Deserializer.ReadUInt(buf, ReadCursor);
var new_val = addr - current.Parent.binderVMStart.Value.ToUInt32() + current.Parent.ShadowBinderVMStart;
Deserializer.WriteUInt(new_val, buf, ReadCursor);
ReadCursor += Pointer.Size;
break;
}
case BinderINode.BC_TRANSACTION:
case BinderINode.BC_REPLY:
{
var ret = MarshalTransaction();
if (ret < 0)
{
return(ret);
}
break;
}
case BinderINode.BC_REGISTER_LOOPER:
case BinderINode.BC_ENTER_LOOPER:
case BinderINode.BC_EXIT_LOOPER:
break;
default:
Arch.Console.Write("binder: unsupported IPC primitive ");
Arch.Console.Write(cmd);
Arch.Console.WriteLine();
return(-1);
}
}
r = AppendPatchTable();
if (r != 0)
{
return(-1);
}
//Arch.Console.Write("Dump write buffer ");
//Arch.Console.Write(current.Tid);
//Arch.Console.WriteLine();
//DumpBuf(new Pointer(buf.Location), size);
return(0);
}
private static void SetU32(ByteBufferRef arr, int off, uint val)
{
Deserializer.WriteUInt(val, arr, off);
}