public override ETMDecodeState HandleByte(SymByte aByte)
{
ETMDecodeState nextState = this;
//
if (aByte == 0)
{
++iASyncConsecutiveNullByteCount;
}
else if (aByte == 0x80 && iASyncConsecutiveNullByteCount == 5)
{
// That's the start of the a-sync packet
iASyncConsecutiveNullByteCount = 0;
base.StateData.SetSynchronized();
nextState = new ETMDecodeStateSynchronized(base.StateData);
Trace();
}
else
{
// Invalid byte
throw new ETMException("ERROR - data is corrupt - expected null byte or end marker during A-SYNC");
}
//
return(nextState);
}
public override ETMDecodeState HandleByte(SymByte aByte)
{
ETMDecodeState nextState = this;
//
ETMPcktBase packet = Packets.Factory.ETMPacketFactory.Create(aByte);
if (packet != null)
{
if (packet is ETMPcktBranch)
{
nextState = new ETMDecodeStateBranch(base.StateData);
base.StateData.PushBack(aByte);
}
else if (packet is ETMPcktIgnore)
{
nextState = new ETMDecodeStateIgnore(base.StateData);
base.StateData.PushBack(aByte);
}
else if (packet is ETMPcktISync)
{
nextState = new ETMDecodeStateISync(base.StateData);
base.StateData.PushBack(aByte);
}
else if (packet is ETMPcktPHeaderFormat1 || packet is ETMPcktPHeaderFormat2)
{
nextState = new ETMDecodeStatePHeader(base.StateData);
base.StateData.PushBack(aByte);
}
else if (packet is ETMPcktASync)
{
nextState = new ETMDecodeStateASync(base.StateData);
base.StateData.PushBack(aByte);
}
else if (packet is ETMPcktOutOfOrderData)
{
nextState = new ETMDecodeStateOutOfOrderData(base.StateData);
base.StateData.PushBack(aByte);
}
else if (packet is ETMPcktCycleCount)
{
nextState = new ETMDecodeStateCycleCount(base.StateData);
}
else if (packet is ETMPcktContextID)
{
nextState = new ETMDecodeStateContextID(base.StateData);
}
else
{
base.Trace(string.Format("OP NOT HANDLED: {0:x2}", aByte));
System.Diagnostics.Debug.Assert(false);
}
}
else
{
base.Trace(string.Format("WARNING: OP NOT RECOGNISED: {0:x2}", aByte));
System.Diagnostics.Debug.Assert(false);
}
//
return(nextState);
}
public override ETMDecodeState HandleByte(SymByte aByte)
{
ETMDecodeState nextState = this;
if (iSeenHeader == false)
{
ETMPcktOutOfOrderData cycle = new ETMPcktOutOfOrderData(aByte);
cycle.Matches(aByte);
iDataByteCount = cycle.Size;
iSeenHeader = true;
}
else
{
iBytes.Add(aByte);
//
if (iBytes.Count == iDataByteCount)
{
// Done
nextState = new ETMDecodeStateSynchronized(base.StateData);
}
}
// Done.
return(nextState);
}
public override ETMDecodeState HandleByte(SymByte aByte)
{
ETMDecodeState nextState = this;
//
if (aByte == 0)
{
++iASyncConsecutiveNullByteCount;
}
else if (aByte == 0x80 && iASyncConsecutiveNullByteCount == 5)
{
// That's the start of the a-sync packet
iASyncConsecutiveNullByteCount = 0;
base.StateData.SetSynchronized();
nextState = new ETMDecodeStateSynchronized(base.StateData);
Trace();
}
else
{
iASyncConsecutiveNullByteCount = 0;
base.StateData.SetUnsynchronized();
}
//
return(nextState);
}
public virtual ETMDecodeState PrepareToHandleByte(SymByte aByte)
{
iCurrentRawByte = aByte;
//
ETMDecodeState ret = HandleByte(aByte);
return(ret);
}
private void Trace(SymAddress aOriginalAddress, TArmInstructionSet aOriginalISet, SymAddress aNewAddress, TArmInstructionSet aNewISet)
{
System.Diagnostics.Debug.Assert(base.StateData.LastBranch.IsKnown);
//
StringBuilder lines = new StringBuilder();
lines.AppendLine(" I-SYNC");
lines.AppendLine(string.Format(" from: {0} 0x{1:x8} {2}", ETMDecodeState.MakeInstructionSetPrefix(aOriginalISet), aOriginalAddress, StateData.Engine.LookUpSymbol(aOriginalAddress)));
lines.AppendLine(string.Format(" to: {0} 0x{1:x8} {2}", ETMDecodeState.MakeInstructionSetPrefix(aNewISet), aNewAddress, StateData.Engine.LookUpSymbol(aNewAddress)));
//
base.Trace(lines.ToString());
}
public override ETMDecodeState HandleByte(SymByte aByte)
{
// Handle the byte
PerformStateOperation(aByte);
// Decide what to return based upon current state
ETMDecodeState nextState = this;
if (iState == TState.EStateFinished)
{
iDecoder.FlushChanges();
nextState = new ETMDecodeStateSynchronized(base.StateData);
}
// Done.
return(nextState);
}
private void TraceDirectBranch(SymAddress aOriginalAddress, TArmInstructionSet aOriginalISet, SymAddress aNewAddress, TArmInstructionSet aNewISet)
{
StringBuilder lines = new StringBuilder();
lines.AppendLine(" BRANCH-D");
//
if (base.StateData.LastBranch.IsKnown)
{
lines.AppendLine(string.Format(" from: {0} 0x{1:x8} {2}", ETMDecodeState.MakeInstructionSetPrefix(aOriginalISet), aOriginalAddress, StateData.Engine.LookUpSymbol(aOriginalAddress)));
lines.AppendLine(string.Format(" to: {0} 0x{1:x8} {2}", ETMDecodeState.MakeInstructionSetPrefix(aNewISet), aNewAddress, StateData.Engine.LookUpSymbol(aNewAddress)));
}
else
{
}
//
base.Trace(lines.ToString());
}
public override ETMDecodeState HandleByte(SymByte aByte)
{
// TODO: test this
ETMDecodeState nextState = this;
//
int byteNumber = iContextIdBytesRequired - iBytesRemaining;
uint val = aByte.LShift(byteNumber * 8);
iContextId |= val;
//
if (--iBytesRemaining == 0)
{
// Got everything
base.StateData.SetContextID(iContextId);
nextState = new ETMDecodeStateSynchronized(base.StateData);
}
//
return(nextState);
}
public override ETMDecodeState HandleByte(SymByte aByte)
{
ETMDecodeState nextState = this;
//
switch (iState)
{
case TState.EStateHeader:
if (base.StateData.Config.ContextIDSize != 0)
{
iState = TState.EStateContextId;
}
else
{
iState = TState.EStateInformation;
}
break;
case TState.EStateContextId:
OnContextByte(aByte);
break;
case TState.EStateInformation:
OnInformationByte(aByte);
break;
case TState.EStateAddress:
OnAddress(aByte);
break;
default:
case TState.EStateIdle:
System.Diagnostics.Debug.Assert(false);
break;
}
//
if (iState == TState.EStateIdle)
{
nextState = new ETMDecodeStateSynchronized(base.StateData);
}
//
return(nextState);
}
