private static int UnmarshalDataEntries(Thread current, ByteBufferRef buf, ref sys_binder_write_desc desc)
{
var cursor = desc.read_consumed;
var i = 0;
while (i < desc.patch_table_entries && cursor < buf.Length)
{
if (cursor + 2 * sizeof(uint) > buf.Length)
{
return(-1);
}
var offset = Deserializer.ReadUInt(buf, cursor);
cursor += sizeof(uint);
var length = (int)Deserializer.ReadUInt(buf, cursor);
cursor += sizeof(int);
if (cursor + length > buf.Length)
{
return(-1);
}
//Arch.Console.Write("UnmarshalDataEntries: offset=");
//Arch.Console.Write(offset);
//Arch.Console.Write(" length=");
//Arch.Console.Write(length);
//Arch.Console.WriteLine();
//BinderIPCMarshaler.DumpBuf(marshaledPtr, length);
var b = buf.Slice(cursor, length);
if (b.Length + offset > current.Parent.binderVMSize)
{
return(-1);
}
Contract.Assert(offset + b.Length <= current.Parent.binderVMSize);
if ((current.Parent.binderVMStart + offset).Write(current, b) != 0)
{
return(-1);
}
cursor += length;
i++;
}
return(0);
}
public static int UnmarshalReadBuffer(Thread thr, ByteBufferRef completionBuf, ref sys_binder_write_desc desc, UserPtr readBuffer, int readBufferSize)
{
var proc = thr.Parent;
var marshaledPtr = new Pointer(completionBuf.Location);
//Arch.Console.Write("read_consumed:");
//Arch.Console.Write(desc.read_consumed);
//BinderIPCMarshaler.DumpBuf(new Pointer(completionBuf.Location), (int)desc.read_consumed);
if (proc.binderVMStart == UserPtr.Zero)
{
Arch.Console.WriteLine("proc.binderVMStart == UserPtr.Zero");
return -ErrorCode.EFAULT;
}
if (UnmarshalDataEntries(thr, completionBuf, ref desc) != 0)
{
Arch.Console.WriteLine("UnmarshalDataEntries failed");
return -ErrorCode.ENOMEM;
}
if (desc.read_consumed > completionBuf.Length)
{
Arch.Console.WriteLine("UnmarshalReadBuffer: bad input");
return -ErrorCode.ENOMEM;
}
// Patch pointers and convert file descriptors
var b = completionBuf.Slice(0, desc.read_consumed);
if (PatchReadBuffer(thr, b) != 0)
{
Arch.Console.WriteLine("Failed to patch read buffer");
return -ErrorCode.EINVAL;
}
if (readBuffer.Write(thr, marshaledPtr, desc.read_consumed) != 0)
{
Arch.Console.WriteLine("readBuffer.Write failed");
return -ErrorCode.ENOMEM;
}
return 0;
}
private static int UnmarshalDataEntries(Thread current, ByteBufferRef buf, ref sys_binder_write_desc desc)
{
var cursor = desc.read_consumed;
var i = 0;
while (i < desc.patch_table_entries && cursor < buf.Length)
{
if (cursor + 2 * sizeof(uint) > buf.Length)
return -1;
var offset = Deserializer.ReadUInt(buf, cursor);
cursor += sizeof(uint);
var length = (int)Deserializer.ReadUInt(buf, cursor);
cursor += sizeof(int);
if (cursor + length > buf.Length)
return -1;
//Arch.Console.Write("UnmarshalDataEntries: offset=");
//Arch.Console.Write(offset);
//Arch.Console.Write(" length=");
//Arch.Console.Write(length);
//Arch.Console.WriteLine();
//BinderIPCMarshaler.DumpBuf(marshaledPtr, length);
var b = buf.Slice(cursor, length);
if ((current.Parent.binderVMStart + offset).Write(current, b) != 0)
return -1;
cursor += length;
i++;
}
return 0;
}
public static int UnmarshalReadBuffer(Thread thr, ByteBufferRef completionBuf, ref sys_binder_write_desc desc, UserPtr readBuffer, int readBufferSize)
{
var proc = thr.Parent;
var marshaledPtr = new Pointer(completionBuf.Location);
//Arch.Console.Write("read_consumed:");
//Arch.Console.Write(desc.read_consumed);
//BinderIPCMarshaler.DumpBuf(new Pointer(completionBuf.Location), (int)desc.read_consumed);
if (proc.binderVMStart == UserPtr.Zero)
{
Arch.Console.WriteLine("proc.binderVMStart == UserPtr.Zero");
return(-ErrorCode.EFAULT);
}
if (UnmarshalDataEntries(thr, completionBuf, ref desc) != 0)
{
Arch.Console.WriteLine("UnmarshalDataEntries failed");
return(-ErrorCode.ENOMEM);
}
if (desc.read_consumed > completionBuf.Length)
{
Arch.Console.WriteLine("UnmarshalReadBuffer: bad input");
return(-ErrorCode.ENOMEM);
}
// Patch pointers and convert file descriptors
var b = completionBuf.Slice(0, desc.read_consumed);
if (PatchReadBuffer(thr, b) != 0)
{
Arch.Console.WriteLine("Failed to patch read buffer");
return(-ErrorCode.EINVAL);
}
if (readBuffer.Write(thr, marshaledPtr, desc.read_consumed) != 0)
{
Arch.Console.WriteLine("readBuffer.Write failed");
return(-ErrorCode.ENOMEM);
}
return(0);
}
