Class that represents a Symbol in a Mach-O file. More...

#include <Symbol.hpp>

Inheritance diagram for LIEF::MachO::Symbol:

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Collaboration diagram for LIEF::MachO::Symbol:

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Public Types
enum class	CATEGORY : uint32_t { NONE = 0 , LOCAL , EXTERNAL , UNDEFINED , INDIRECT_ABS , INDIRECT_LOCAL }
	Category of the symbol when the symbol comes from the `LC_SYMTAB` command. The category is defined according to the `LC_DYSYMTAB` (DynamicSymbolCommand) command.

enum class	ORIGIN : uint32_t { UNKNOWN = 0 , DYLD_EXPORT = 1 , DYLD_BIND = 2 , LC_SYMTAB = 3 }

enum class	TYPE : uint32_t { UNDEFINED = 0x0u , ABSOLUTE_SYM = 0x2u , SECTION = 0xeu , PREBOUND = 0xcu , INDIRECT = 0xau }

Public Types inherited from LIEF::Object
template<class T >
using	output_t = add_pointer_t<decay_t<T>>

template<class T >
using	output_const_t = add_pointer_t<add_const_t<decay_t<T>>>

Public Member Functions
	Symbol (const details::nlist_32 &cmd)

	Symbol (const details::nlist_64 &cmd)

Symbol &	operator= (Symbol other)

	Symbol (const Symbol &other)

void	swap (Symbol &other) noexcept

uint8_t	raw_type () const
	Raw value of `nlist_xx.n_type`

TYPE	type () const
	Type as defined by `nlist_xx.n_type & N_TYPE`

uint8_t	numberof_sections () const
	It returns the number of sections in which this symbol can be found. If the symbol can't be found in any section, it returns 0 (NO_SECT)

uint16_t	description () const
	Return information about the symbol (SYMBOL_DESCRIPTIONS)

bool	has_export_info () const
	True if the symbol is associated with an ExportInfo This value is set when the symbol comes from the Dyld Export trie.

const ExportInfo *	export_info () const
	Return the ExportInfo associated with this symbol (or nullptr if not present)

ExportInfo *	export_info ()

bool	has_binding_info () const
	True if the symbol is associated with a BindingInfo This value is set when the symbol comes from the Dyld symbol bindings.

const BindingInfo *	binding_info () const
	Return the BindingInfo associated with this symbol (or nullptr if not present)

BindingInfo *	binding_info ()

std::string	demangled_name () const
	Try to demangle the symbol or return an empty string if it is not possible.

bool	is_external () const
	True if the symbol is defined as an external symbol.

const DylibCommand *	library () const
	Return the library in which the symbol is defined. It returns a null pointer if the library can't be resolved.

DylibCommand *	library ()

ORIGIN	origin () const
	Return the origin of the symbol: from LC_SYMTAB command or from the Dyld information.

CATEGORY	category () const
	Category of the symbol according to the `LC_DYSYMTAB` command.

void	raw_type (uint8_t type)

void	numberof_sections (uint8_t nbsections)

void	description (uint16_t desc)

void	accept (Visitor &visitor) const override

Public Member Functions inherited from LIEF::Symbol
	Symbol (std::string name)

	Symbol (std::string name, uint64_t value)

	Symbol (std::string name, uint64_t value, uint64_t size)

	Symbol (const Symbol &)=default

Symbol &	operator= (const Symbol &)=default

void	swap (Symbol &other) noexcept

virtual const std::string &	name () const
	Return the symbol's name.

virtual std::string &	name ()

virtual void	name (std::string name)
	Set symbol name.

virtual uint64_t	value () const

virtual void	value (uint64_t value)

virtual uint64_t	size () const
	This size of the symbol (when applicable)

virtual void	size (uint64_t value)

void	accept (Visitor &visitor) const override
	Method so that the `visitor` can visit us.

Public Member Functions inherited from LIEF::Object
	Object (const Object &other)

Object &	operator= (const Object &other)

template<class T >
output_t< T >	as ()

template<class T >
output_const_t< T >	as () const

virtual bool	operator== (const Object &other) const

virtual bool	operator!= (const Object &other) const

Static Public Member Functions
static const Symbol &	indirect_abs ()

static const Symbol &	indirect_local ()

Static Public Attributes
static constexpr uint32_t	TYPE_MASK = 0x0e
	Same as N_TYPE.

Detailed Description

Class that represents a Symbol in a Mach-O file.

A Mach-O symbol can come from:

The symbols command (LC_SYMTAB / SymbolCommand)
The Dyld Export trie
The Dyld Symbol bindings

Member Enumeration Documentation

◆ ORIGIN

enum class LIEF::MachO::Symbol::ORIGIN : uint32_t

strong

Enumerator
LC_SYMTAB	The symbol comes from the binding opcodes.

◆ TYPE

enum class LIEF::MachO::Symbol::TYPE : uint32_t

strong

Enumerator
UNDEFINED	The symbol is undefined. It is referenced in a different module.
ABSOLUTE_SYM	The symbol is absolute. The linker doesn't update his value.
SECTION	The symbol is defined in the section number given in nlist_base.n_sect .
PREBOUND	The symbol is undefined and the image is using a prebound value for the symbol. Set the n_sect field to NO_SECT .
INDIRECT	The symbol is defined to be the same as another symbol. The n_value field is an index into the string table specifying the name of the other symbol. When that symbol is linked, both this and the other symbol point to the same defined type and value.

Member Function Documentation

◆ accept()

void LIEF::MachO::Symbol::accept ( Visitor & visitor ) const

overridevirtual

Implements LIEF::Object.

◆ binding_info()

const BindingInfo * LIEF::MachO::Symbol::binding_info ( ) const

inline

Return the BindingInfo associated with this symbol (or nullptr if not present)

See also: has_binding_info

◆ export_info()

const ExportInfo * LIEF::MachO::Symbol::export_info ( ) const

inline

Return the ExportInfo associated with this symbol (or nullptr if not present)

See also: has_export_info

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

MachO/Symbol.hpp

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes