LIEF::assembly::Instruction Class Reference

This class represents an assembly instruction. More...

#include <Instruction.hpp>

Inheritance diagram for LIEF::assembly::Instruction:

Classes
class	Iterator
	Lazy-forward iterator that outputs Instruction More...

Public Types
enum class	MemoryAccess : uint8_t { NONE = 0 , READ = 1 << 0 , WRITE = 1 << 1 , READ_WRITE = READ | WRITE }
	Memory operation flags. More...

Public Member Functions
uint64_t	address () const
	Address of the instruction.
size_t	size () const
	Size of the instruction in bytes.
const std::vector< uint8_t > &	raw () const
	Raw bytes of the current instruction.
std::string	mnemonic () const
	Instruction mnemonic (e.g. br)
std::string	to_string (bool with_address=true) const
	Representation of the current instruction in a pretty assembly way.
bool	is_call () const
	True if the instruction is a call.
bool	is_terminator () const
	True if the instruction marks the end of a basic block.
bool	is_branch () const
	True if the instruction is a branch.
bool	is_syscall () const
	True if the instruction is a syscall.
bool	is_memory_access () const
	True if the instruction performs a memory access.
bool	is_move_reg () const
	True if the instruction is a register to register move.
bool	is_add () const
	True if the instruction performs an arithmetic addition.
bool	is_trap () const
	True if the instruction is a trap.
bool	is_barrier () const
	True if the instruction prevents executing the instruction that immediatly follows the current. This includes return or unconditional branch instructions.
bool	is_return () const
	True if the instruction is a return.
bool	is_indirect_branch () const
	True if the instruction is and indirect branch.
bool	is_conditional_branch () const
	True if the instruction is conditionally jumping to the next instruction or an instruction into some other basic block.
bool	is_unconditional_branch () const
	True if the instruction is jumping (unconditionally) to some other basic block.
bool	is_compare () const
	True if the instruction is a comparison.
bool	is_move_immediate () const
	True if the instruction is moving an immediate.
bool	is_bitcast () const
	True if the instruction is doing a bitcast.
MemoryAccess	memory_access () const
	Memory access flags.
result< uint64_t >	branch_target () const
	Given a is_branch() instruction, try to evaluate the address of the destination.
const llvm::MCInst &	mcinst () const
	Return the underlying llvm::MCInst implementation.
template<class T >
const T *	as () const
	This function can be used to down cast an Instruction instance:
virtual	~Instruction ()

Detailed Description

This class represents an assembly instruction.

Member Enumeration Documentation

MemoryAccess

enum class LIEF::assembly::Instruction::MemoryAccess : uint8_t

strong

Memory operation flags.

Enumerator
NONE
READ
WRITE
READ_WRITE

Constructor & Destructor Documentation

~Instruction()

virtual LIEF::assembly::Instruction::~Instruction ( )

virtual

Reimplemented in LIEF::assembly::aarch64::Instruction, LIEF::assembly::arm::Instruction, LIEF::assembly::ebpf::Instruction, LIEF::assembly::mips::Instruction, LIEF::assembly::powerpc::Instruction, LIEF::assembly::riscv::Instruction, and LIEF::assembly::x86::Instruction.

Member Function Documentation

address()

uint64_t LIEF::assembly::Instruction::address

(

)

const

Address of the instruction.

as()

template<class T >

const T * LIEF::assembly::Instruction::as ( ) const

inline

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

std::unique_ptr<assembly::Instruction> inst = get_inst();
if (const auto* arm = inst->as<assembly::arm::Instruction>()) {
  const arm::OPCODE op = arm->opcode();
}

branch_target()

result< uint64_t > LIEF::assembly::Instruction::branch_target

(

)

const

Given a is_branch() instruction, try to evaluate the address of the destination.

is_add()

bool LIEF::assembly::Instruction::is_add

(

)

const

True if the instruction performs an arithmetic addition.

is_barrier()

bool LIEF::assembly::Instruction::is_barrier

(

)

const

True if the instruction prevents executing the instruction that immediatly follows the current. This includes return or unconditional branch instructions.

is_bitcast()

bool LIEF::assembly::Instruction::is_bitcast

(

)

const

True if the instruction is doing a bitcast.

is_branch()

bool LIEF::assembly::Instruction::is_branch

(

)

const

True if the instruction is a branch.

is_call()

bool LIEF::assembly::Instruction::is_call

(

)

const

True if the instruction is a call.

is_compare()

bool LIEF::assembly::Instruction::is_compare

(

)

const

True if the instruction is a comparison.

is_conditional_branch()

bool LIEF::assembly::Instruction::is_conditional_branch

(

)

const

True if the instruction is conditionally jumping to the next instruction or an instruction into some other basic block.

is_indirect_branch()

bool LIEF::assembly::Instruction::is_indirect_branch

(

)

const

True if the instruction is and indirect branch.

This includes instructions that branch through a register (e.g. jmp rax, br x1).

is_memory_access()

bool LIEF::assembly::Instruction::is_memory_access

(

)

const

True if the instruction performs a memory access.

is_move_immediate()

bool LIEF::assembly::Instruction::is_move_immediate

(

)

const

True if the instruction is moving an immediate.

is_move_reg()

bool LIEF::assembly::Instruction::is_move_reg

(

)

const

True if the instruction is a register to register move.

is_return()

bool LIEF::assembly::Instruction::is_return

(

)

const

True if the instruction is a return.

is_syscall()

bool LIEF::assembly::Instruction::is_syscall

(

)

const

True if the instruction is a syscall.

is_terminator()

bool LIEF::assembly::Instruction::is_terminator

(

)

const

True if the instruction marks the end of a basic block.

is_trap()

bool LIEF::assembly::Instruction::is_trap

(

)

const

True if the instruction is a trap.

• On x86/x86-64 this includes the ud1/ud2 instructions
• On AArch64 this includes the brk/udf instructions

is_unconditional_branch()

bool LIEF::assembly::Instruction::is_unconditional_branch

(

)

const

True if the instruction is jumping (unconditionally) to some other basic block.

mcinst()

const llvm::MCInst & LIEF::assembly::Instruction::mcinst

(

)

const

Return the underlying llvm::MCInst implementation.

Warning

Because of ABI compatibility, this MCInst can only be used with the same version of LLVM used by LIEF.

memory_access()

MemoryAccess LIEF::assembly::Instruction::memory_access

(

)

const

Memory access flags.

mnemonic()

std::string LIEF::assembly::Instruction::mnemonic

(

)

const

Instruction mnemonic (e.g. br)

raw()

const std::vector< uint8_t > & LIEF::assembly::Instruction::raw

(

)

const

Raw bytes of the current instruction.

size()

size_t LIEF::assembly::Instruction::size

(

)

const

Size of the instruction in bytes.

to_string()

std::string LIEF::assembly::Instruction::to_string

(

bool

with_address = true

)

const

Representation of the current instruction in a pretty assembly way.

Referenced by operator<<.

---

The documentation for this class was generated from the following file:

• Instruction.hpp