/// <summary>
/// Prints an operand cast.
/// </summary>
/// <param name="u">TODO u.</param>
/// <param name="op">TODO op.</param>
public void OperandCast(ref Ud u, ref UdOperand op)
{
if (u.BrFar > 0)
{
Syn.UdAsmPrintf(ref u, "far ");
}
switch (op.Size)
{
case 8:
Syn.UdAsmPrintf(ref u, "byte ");
break;
case 16:
Syn.UdAsmPrintf(ref u, "word ");
break;
case 32:
Syn.UdAsmPrintf(ref u, "dword ");
break;
case 64:
Syn.UdAsmPrintf(ref u, "qword ");
break;
case 80:
Syn.UdAsmPrintf(ref u, "tword ");
break;
default:
break;
}
}
/// <summary>
/// TODO summary.
/// </summary>
/// <param name="u">TODO u.</param>
/// <param name="op">TODO op.</param>
public void UdSynPrintImm(ref Ud u, ref UdOperand op)
{
UInt64 v;
if (op.OperandCode == UdOperandCode.OP_sI && op.Size != u.OprMode)
{
if (op.Size == 8)
{
v = (UInt64)op.Lval.SByte;
}
else
{
Debug.Assert(op.Size == 32, "TODO: REASON");
v = (UInt64)op.Lval.SdWord;
}
if (u.OprMode < 64)
{
v = v & ((1ul << u.OprMode) - 1ul);
}
}
else
{
switch (op.Size)
{
case 8:
v = op.Lval.UByte;
break;
case 16:
v = op.Lval.UWord;
break;
case 32:
v = op.Lval.UdWord;
break;
case 64:
v = op.Lval.UqWord;
break;
default:
Debug.Assert(false, "invalid offset");
v = 0; // keep cc happy
break;
}
}
UdAsmPrintf(ref u, "0x{0:x}", v);
}
/// <summary>
/// TODO summary.
/// </summary>
/// <param name="u">TODO u.</param>
/// <param name="opr">TODO opr.</param>
/// <returns>TODO TODO.</returns>
public UInt64 UdSynRelTarget(ref Ud u, ref UdOperand opr)
{
UInt64 trunc_mask = 0xffffffffffffffff >> (64 - u.OprMode);
switch (opr.Size)
{
case 8:
return((u.Pc + (UInt64)opr.Lval.SByte) & trunc_mask);
case 16:
return((u.Pc + (UInt64)opr.Lval.SWord) & trunc_mask);
case 32:
return((u.Pc + (UInt64)opr.Lval.SdWord) & trunc_mask);
default:
Debug.Assert(false, "invalid relative offset size.");
return(0);
}
}
/// <summary>
/// Returns true if the given operand is of a general purpose register type.
/// </summary>
/// <param name="opr">TODO opr.</param>
/// <returns>TODO TODO.</returns>
private static Boolean UdOprIsGpr(ref UdOperand opr)
{
return(opr.UdType == UdType.UD_OP_REG && opr.Base >= UdType.UD_R_AL && opr.Base <= UdType.UD_R_R15);
}
/// <summary>
/// Returns true if the given operand is of a segment register type.
/// </summary>
/// <param name="opr">TODO opr.</param>
/// <returns>TODO TODO.</returns>
public static bool UdOprIsSeg(UdOperand opr)
{
return(opr.UdType == UdType.UD_OP_REG && opr.Base >= UdType.UD_R_ES && opr.Base <= UdType.UD_R_GS);
}
/// <summary>
/// Generates assembly output for each operand.
/// </summary>
/// <param name="u">TODO u.</param>
/// <param name="op">TODO op.</param>
/// <param name="synCast">TODO synCast.</param>
private void GenOperand(ref Ud u, ref UdOperand op, Int32 synCast)
{
switch (op.UdType)
{
case UdType.UD_OP_REG:
Syn.UdAsmPrintf(ref u, "{0}", Syn.UdRegTab[op.Base - UdType.UD_R_AL]);
break;
case UdType.UD_OP_MEM:
if (synCast > 0)
{
this.OperandCast(ref u, ref op);
}
Syn.UdAsmPrintf(ref u, "[");
if (u.PfxSeg > 0)
{
Syn.UdAsmPrintf(ref u, "{0}:", Syn.UdRegTab[u.PfxSeg - (int)UdType.UD_R_AL]);
}
if (op.Base > 0)
{
Syn.UdAsmPrintf(ref u, "{0}", Syn.UdRegTab[op.Base - UdType.UD_R_AL]);
}
if (op.Index > 0)
{
Syn.UdAsmPrintf(ref u, "{0}{1}", op.Base != UdType.UD_NONE ? "+" : String.Empty, Syn.UdRegTab[op.Index - UdType.UD_R_AL]);
if (op.Scale > 0)
{
Syn.UdAsmPrintf(ref u, "*{0}", op.Scale);
}
}
if (op.Offset != 0)
{
this.UdSynPrintMemDisp(ref u, ref op, (op.Base != UdType.UD_NONE || op.Index != UdType.UD_NONE) ? 1 : 0);
}
Syn.UdAsmPrintf(ref u, "]");
break;
case UdType.UD_OP_IMM:
this.UdSynPrintImm(ref u, ref op);
break;
case UdType.UD_OP_JIMM:
this.UdSynPrintAddr(ref u, (Int64)this.UdSynRelTarget(ref u, ref op));
break;
case UdType.UD_OP_PTR:
switch (op.Size)
{
case 32:
Syn.UdAsmPrintf(ref u, "word 0x{0:x}:0x{1:x}", op.Lval.PtrSeg, op.Lval.PtrOff & 0xFFFF);
break;
case 48:
Syn.UdAsmPrintf(ref u, "dword 0x{0:x}:0x{0:x}", op.Lval.PtrSeg, op.Lval.PtrOff);
break;
}
break;
case UdType.UD_OP_CONST:
if (synCast > 0)
{
this.OperandCast(ref u, ref op);
}
Syn.UdAsmPrintf(ref u, "{0}", op.Lval.UdWord);
break;
default:
return;
}
}
/// <summary>
/// TODO summary.
/// </summary>
/// <param name="u">TODO u.</param>
/// <param name="op">TODO op.</param>
/// <param name="sign">TODO sign.</param>
public void UdSynPrintMemDisp(ref Ud u, ref UdOperand op, Int32 sign)
{
Debug.Assert(op.Offset != 0, "TODO: REASON");
if (op.Base == UdType.UD_NONE && op.Index == UdType.UD_NONE)
{
UInt64 v;
Debug.Assert(op.Scale == 0 && op.Offset != 8, "TODO: REASON");
// unsigned mem-offset
switch (op.Offset)
{
case 16:
v = op.Lval.UWord;
break;
case 32:
v = op.Lval.UdWord;
break;
case 64:
v = op.Lval.UqWord;
break;
default:
Debug.Assert(false, "invalid offset");
v = 0; // keep cc happy
break;
}
UdAsmPrintf(ref u, "0x{0:x}", v);
}
else
{
Int64 v;
Debug.Assert(op.Offset != 64, "TODO: REASON");
switch (op.Offset)
{
case 8:
v = op.Lval.SByte;
break;
case 16:
v = op.Lval.SWord;
break;
case 32:
v = op.Lval.SdWord;
break;
default:
Debug.Assert(false, "invalid offset");
v = 0; // keep cc happy
break;
}
if (v < 0)
{
UdAsmPrintf(ref u, "-0x{0:x}", -v);
}
else if (v > 0)
{
UdAsmPrintf(ref u, "{0}0x{1:x}", sign > 0 ? "+" : String.Empty, v);
}
}
}