PowerPC

Instruction

class Instruction : public LIEF::assembly::Instruction

Public Types

using operands_it = iterator_range<Operand::Iterator>

Public Functions

OPCODE opcode() const

The instruction opcode as defined in LLVM.

operands_it operands() const

Iterator over the operands of the current instruction.

virtual ~Instruction() override = default

Public Static Functions

static bool classof(const assembly::Instruction *inst)

True if inst is an effective instance of powerpc::Instruction.

Opcodes

See LIEF::assembly::powerpc::OPCODE in include/asm/powerpc/opcodes.hpp

Operands

class Operand

This class represents an operand for a PowerPC instruction.

Subclassed by LIEF::assembly::powerpc::operands::Immediate, LIEF::assembly::powerpc::operands::Memory, LIEF::assembly::powerpc::operands::PCRelative, LIEF::assembly::powerpc::operands::Register

Public Functions

std::string to_string() const

Pretty representation of the operand.

template<class T>
inline const T *as() const

This function can be used to down cast an Operand instance:

std::unique_ptr<assembly::powerpc::Operand> op = ...;
if (const auto* imm = inst->as<assembly::powerpc::operands::Immediate>()) {
  const int64_t value = imm->value();
}

virtual ~Operand()

Friends

inline friend std::ostream &operator<<(std::ostream &os, const Operand &op)

class Iterator : public LIEF::iterator_facade_base<Iterator, std::forward_iterator_tag, Operand, std::ptrdiff_t, const Operand*, const Operand&>

Forward iterator that lazily disassembles powerpc Operand.

Public Types

using implementation = details::OperandIt

Public Functions

Iterator()

Iterator(std::unique_ptr<details::OperandIt> impl)

Iterator(const Iterator&)

Iterator &operator=(const Iterator&)

Iterator(Iterator&&) noexcept

Iterator &operator=(Iterator&&) noexcept

~Iterator()

Iterator &operator++()

const Operand &operator*() const

const Operand *operator->() const

std::unique_ptr<Operand> yield()

Transfer ownership of the operand at the current position to the caller. Returns nullptr if the iterator is past-the-end.

inline DerivedT operator++(int)

Friends

friend bool operator==(const Iterator &LHS, const Iterator &RHS)

inline friend bool operator!=(const Iterator &LHS, const Iterator &RHS)

Immediate

class Immediate : public LIEF::assembly::powerpc::Operand

This class represents an immediate operand (i.e. a constant).

For instance:

li 3, 8
      |
      +---> Immediate(8)

Public Functions

int64_t value() const

The constant value wrapped by this operand.

~Immediate() override = default

Public Static Functions

static bool classof(const Operand *op)

Register

class Register : public LIEF::assembly::powerpc::Operand

This class represents a register operand.

For instance:

add 3, 4, 5
     |  |  |
     |  |  +---------> Register(5)
     |  +------------> Register(4)
     +---------------> Register(3)

Public Functions

REG value() const

The effective REG wrapped by this operand.

~Register() override = default

Public Static Functions

static bool classof(const Operand *op)

Memory

class Memory : public LIEF::assembly::powerpc::Operand

This class represents a memory operand.

PowerPC has two addressing forms:

lwz   3, 8(4)              lwzx   3, 4, 5
       |  |                       |  |  |
+------+  +---+            +------+   |  +---+
|             |           |          |      |
v             v           v          v      v
Disp         Base        Reg        Base   Index

Public Functions

REG base() const

The base register.

For lwz 3, 8(4) it would return 4.

offset_t offset() const

The addressing offset.

It can be either:

• An index register (e.g. lwzx 3, 4, 5)

• A displacement (e.g. lwz 3, 8(4))

~Memory() override = default

Public Static Functions

static bool classof(const Operand *op)

struct offset_t

Wraps the memory offset as either an integer displacement or an index register.

Public Types

enum class TYPE

Enum type used to discriminate the anonymous union.

Values:

enumerator NONE = 0

enumerator REG

The union holds the REG attribute.

enumerator DISP

The union holds the displacement attribute (int64_t).

Public Members

REG reg

Register offset (index register).

int64_t displacement = 0

Integer offset.

union LIEF::assembly::powerpc::operands::Memory::offset_t::[anonymous] [anonymous]

TYPE type = TYPE::NONE

PCRelative

class PCRelative : public LIEF::assembly::powerpc::Operand

This class represents a PC-relative operand.

bl 0x100
   |
   v
 PC Relative operand

Public Functions

int64_t value() const

The effective value that is relative to the current pc register.

~PCRelative() override = default

Public Static Functions

static bool classof(const Operand *op)