internal static IEnumerable <XrefInstance> XrefScanImpl(Decoder decoder, bool skipClassCheck = false)
{
while (true)
{
decoder.Decode(out var instruction);
if (decoder.LastError == DecoderError.NoMoreBytes)
{
yield break;
}
if (instruction.FlowControl == FlowControl.Return)
{
yield break;
}
if (instruction.Mnemonic == Mnemonic.Int || instruction.Mnemonic == Mnemonic.Int1)
{
yield break;
}
if (instruction.Mnemonic == Mnemonic.Call || instruction.Mnemonic == Mnemonic.Jmp)
{
var targetAddress = ExtractTargetAddress(instruction);
if (targetAddress != 0)
{
yield return(new XrefInstance(XrefType.Method, (IntPtr)targetAddress, (IntPtr)instruction.IP));
}
continue;
}
if (instruction.FlowControl == FlowControl.UnconditionalBranch)
{
continue;
}
if (IsMoveMnemonic(instruction.Mnemonic))
{
XrefInstance?result = null;
try
{
if (instruction.Op1Kind == OpKind.Memory && instruction.IsIPRelativeMemoryOperand)
{
var movTarget = (IntPtr)instruction.IPRelativeMemoryAddress;
if (instruction.MemorySize != MemorySize.UInt64)
{
continue;
}
if (skipClassCheck || XrefGlobalClassFilter(movTarget))
{
result = new XrefInstance(XrefType.Global, movTarget, (IntPtr)instruction.IP);
}
}
}
catch (Exception ex)
{
LogSupport.Error(ex.ToString());
}
if (result != null)
{
yield return(result.Value);
}
}
}
}
internal static IEnumerable <XrefInstance> XrefScanImpl(Decoder decoder)
{
while (true)
{
decoder.Decode(out var instruction);
if (decoder.InvalidNoMoreBytes)
{
yield break;
}
if (instruction.FlowControl == FlowControl.Return)
{
yield break;
}
if (instruction.Mnemonic == Mnemonic.Int || instruction.Mnemonic == Mnemonic.Int1)
{
yield break;
}
if (instruction.Mnemonic == Mnemonic.Call || instruction.Mnemonic == Mnemonic.Jmp)
{
var targetAddress = ExtractTargetAddress(instruction);
if (targetAddress != 0)
{
yield return(new XrefInstance(XrefType.Method, (IntPtr)targetAddress));
}
continue;
}
if (instruction.FlowControl == FlowControl.UnconditionalBranch)
{
continue;
}
if (instruction.Mnemonic == Mnemonic.Mov)
{
XrefInstance?result = null;
try
{
if (instruction.Op1Kind == OpKind.Memory && instruction.IsIPRelativeMemoryOperand)
{
var movTarget = (IntPtr)instruction.IPRelativeMemoryAddress;
if (instruction.MemorySize != MemorySize.UInt64)
{
continue;
}
var valueAtMov = (IntPtr)Marshal.ReadInt64(movTarget);
if (valueAtMov != IntPtr.Zero)
{
var targetClass = (IntPtr)Marshal.ReadInt64(valueAtMov);
if (targetClass == Il2CppClassPointerStore <string> .NativeClassPtr || targetClass == Il2CppClassPointerStore <Type> .NativeClassPtr)
{
result = new XrefInstance(XrefType.Global, movTarget);
}
}
}
}
catch (Exception ex)
{
LogSupport.Error(ex.ToString());
}
if (result != null)
{
yield return(result.Value);
}
}
}
}
