/// ModRMFilter - Abstract base class for clases that recognize patterns in
/// ModR/M bytes.
class ModRMFilter {
+ virtual void anchor();
public:
/// Destructor - Override as necessary.
virtual ~ModRMFilter() { }
/// require a ModR/M byte or instructions where the entire ModR/M byte is used
/// for operands.
class DumbFilter : public ModRMFilter {
+ virtual void anchor();
public:
bool isDumb() const {
return true;
/// Some instructions are classified based on whether they are 11 or anything
/// else. This filter performs that classification.
class ModFilter : public ModRMFilter {
-private:
+ virtual void anchor();
bool R;
public:
/// Constructor
/// possible value. Otherwise, there is one instruction for each value of the
/// nnn field [bits 5-3], known elsewhere as the reg field.
class EscapeFilter : public ModRMFilter {
-private:
+ virtual void anchor();
bool C0_FF;
uint8_t NNN_or_ModRM;
public:
/// maps to a single instruction. Such instructions require the ModR/M byte
/// to fall between 0xc0 and 0xff.
class AddRegEscapeFilter : public ModRMFilter {
-private:
+ virtual void anchor();
uint8_t ModRM;
public:
/// Constructor
/// ExtendedFilter - Extended opcodes are classified based on the value of the
/// mod field [bits 7-6] and the value of the nnn field [bits 5-3].
class ExtendedFilter : public ModRMFilter {
-private:
+ virtual void anchor();
bool R;
uint8_t NNN;
public:
/// ExactFilter - The occasional extended opcode (such as VMCALL or MONITOR)
/// requires the ModR/M byte to have a specific value.
-class ExactFilter : public ModRMFilter
-{
-private:
+class ExactFilter : public ModRMFilter {
+ virtual void anchor();
uint8_t ModRM;
public:
/// Constructor