private static IEnumerable <X86Instruction> CreateRegOrMemTestInstructions(X86OpCode opcode, X86Mnemonic mnemonic, bool flippedOperands)
{
for (int operandType = 0; operandType < 3; operandType++)
{
for (int register2Index = 0; register2Index < 8; register2Index++)
{
for (int register1Index = 0; register1Index < 8; register1Index++)
{
var operand1 = new X86Operand(X86OperandUsage.BytePointer,
(X86Register)register1Index | X86Register.Eax);
var operand2 = new X86Operand(X86OperandUsage.Normal, (X86Register)register2Index);
var instruction = new X86Instruction()
{
OpCode = opcode,
Mnemonic = mnemonic,
};
if (flippedOperands)
{
instruction.Operand2 = operand1;
instruction.Operand1 = operand2;
}
else
{
instruction.Operand1 = operand1;
instruction.Operand2 = operand2;
}
switch (register1Index)
{
case 4: // esp
continue;
case 5: // ebp
if (operandType != 0)
{
continue;
}
operand1.Value = 0x1337u;
break;
}
switch (operandType)
{
case 1:
operand1.Offset = 1;
operand1.OffsetType = X86OffsetType.Short;
break;
case 2:
operand1.Offset = 0x1337;
operand1.OffsetType = X86OffsetType.Long;
break;
}
yield return(instruction);
}
}
}
}
private static IEnumerable<X86Instruction> CreateRegOrMemSibTestInstructions(X86OpCode opcode, X86Mnemonic mnemonic)
{
for (int operandType = 0; operandType < 3; operandType++)
{
for (int multiplier = 1; multiplier < 16; multiplier*=2)
{
for (int scaledRegIndex = 0; scaledRegIndex < 8; scaledRegIndex++)
{
if (scaledRegIndex == 4)
continue;
var operand1 = new X86Operand(X86OperandUsage.BytePointer, X86Register.Eax,
new X86ScaledIndex((X86Register)scaledRegIndex | X86Register.Eax, multiplier));
var operand2 = new X86Operand(X86OperandUsage.Normal, X86Register.Al);
var instruction = new X86Instruction()
{
OpCode = opcode,
Mnemonic = mnemonic,
Operand1 = operand1,
Operand2 = operand2,
};
switch (operandType)
{
case 1:
operand1.Offset = 1;
operand1.OffsetType = X86OffsetType.Short;
break;
case 2:
operand1.Offset = 0x1337;
operand1.OffsetType = X86OffsetType.Long;
break;
}
yield return instruction;
}
}
}
}
private static IEnumerable <X86Instruction> CreateRegOrMemSibTestInstructions(X86OpCode opcode, X86Mnemonic mnemonic)
{
for (int operandType = 0; operandType < 3; operandType++)
{
for (int multiplier = 1; multiplier < 16; multiplier *= 2)
{
for (int scaledRegIndex = 0; scaledRegIndex < 8; scaledRegIndex++)
{
if (scaledRegIndex == 4)
{
continue;
}
var operand1 = new X86Operand(X86OperandUsage.BytePointer, X86Register.Eax,
new X86ScaledIndex((X86Register)scaledRegIndex | X86Register.Eax, multiplier));
var operand2 = new X86Operand(X86OperandUsage.Normal, X86Register.Al);
var instruction = new X86Instruction()
{
OpCode = opcode,
Mnemonic = mnemonic,
Operand1 = operand1,
Operand2 = operand2,
};
switch (operandType)
{
case 1:
operand1.Offset = 1;
operand1.OffsetType = X86OffsetType.Short;
break;
case 2:
operand1.Offset = 0x1337;
operand1.OffsetType = X86OffsetType.Long;
break;
}
yield return(instruction);
}
}
}
}
private void WriteOpCode(X86OpCode opCode)
{
_writer.WriteByte(opCode.Op1);
// todo: multibyte opcodes.
}
private static IEnumerable<X86Instruction> CreateRegOrMemTestInstructions(X86OpCode opcode, X86Mnemonic mnemonic, bool flippedOperands)
{
for (int operandType = 0; operandType < 3; operandType++)
{
for (int register2Index = 0; register2Index < 8; register2Index++)
{
for (int register1Index = 0; register1Index < 8; register1Index++)
{
var operand1 = new X86Operand(X86OperandUsage.BytePointer,
(X86Register)register1Index | X86Register.Eax);
var operand2 = new X86Operand(X86OperandUsage.Normal, (X86Register)register2Index);
var instruction = new X86Instruction()
{
OpCode = opcode,
Mnemonic = mnemonic,
};
if (flippedOperands)
{
instruction.Operand2 = operand1;
instruction.Operand1 = operand2;
}
else
{
instruction.Operand1 = operand1;
instruction.Operand2 = operand2;
}
switch (register1Index)
{
case 4: // esp
continue;
case 5: // ebp
if (operandType != 0)
continue;
operand1.Value = 0x1337u;
break;
}
switch (operandType)
{
case 1:
operand1.Offset = 1;
operand1.OffsetType = X86OffsetType.Short;
break;
case 2:
operand1.Offset = 0x1337;
operand1.OffsetType = X86OffsetType.Long;
break;
}
yield return instruction;
}
}
}
}
