Class that represents a Mach-O section. More...

#include <Section.hpp>

Inheritance diagram for LIEF::MachO::Section:

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Collaboration diagram for LIEF::MachO::Section:

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Public Types
enum class	TYPE : uint64_t { REGULAR = 0x00u , ZEROFILL = 0x01u , CSTRING_LITERALS = 0x02u , IS_4BYTE_LITERALS = 0x03u , IS_8BYTE_LITERALS = 0x04u , LITERAL_POINTERS = 0x05u , NON_LAZY_SYMBOL_POINTERS = 0x06u , LAZY_SYMBOL_POINTERS = 0x07u , SYMBOL_STUBS = 0x08u , MOD_INIT_FUNC_POINTERS = 0x09u , MOD_TERM_FUNC_POINTERS = 0x0au , COALESCED = 0x0bu , GB_ZEROFILL = 0x0cu , INTERPOSING = 0x0du , IS_16BYTE_LITERALS = 0x0eu , DTRACE_DOF = 0x0fu , LAZY_DYLIB_SYMBOL_POINTERS = 0x10u , THREAD_LOCAL_REGULAR = 0x11u , THREAD_LOCAL_ZEROFILL = 0x12u , THREAD_LOCAL_VARIABLES = 0x13u , THREAD_LOCAL_VARIABLE_POINTERS = 0x14u , THREAD_LOCAL_INIT_FUNCTION_POINTERS = 0x15u , INIT_FUNC_OFFSETS = 0x16u }

enum class	FLAGS : uint64_t { PURE_INSTRUCTIONS = 0x80000000u , NO_TOC = 0x40000000u , STRIP_STATIC_SYMS = 0x20000000u , NO_DEAD_STRIP = 0x10000000u , LIVE_SUPPORT = 0x08000000u , SELF_MODIFYING_CODE = 0x04000000u , DEBUG_INFO = 0x02000000u , SOME_INSTRUCTIONS = 0x00000400u , EXT_RELOC = 0x00000200u , LOC_RELOC = 0x00000100u }

using	content_t = std::vector<uint8_t>

using	relocations_t = std::vector<std::unique_ptr<Relocation>>
	Internal container for storing Mach-O Relocation.

using	it_relocations = ref_iterator<relocations_t&, Relocation*>
	Iterator which outputs Relocation&.

using	it_const_relocations = const_ref_iterator<const relocations_t&, const Relocation*>
	Iterator which outputs const Relocation&.

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
	Section ()

	Section (const details::section_32 &section_cmd)

	Section (const details::section_64 &section_cmd)

	Section (std::string name)

	Section (std::string name, content_t content)

Section &	operator= (Section copy)

	Section (const Section &copy)

void	swap (Section &other) noexcept

	~Section () override

span< const uint8_t >	content () const override
	section's content

void	content (const content_t &data) override
	Update the content of the section.

const std::string &	segment_name () const
	Return the name of the segment linked to this section.

uint64_t	address () const
	Virtual base address of the section.

uint32_t	alignment () const
	Section alignment as a power of 2.

uint32_t	relocation_offset () const
	Offset of the relocation table. This value should be 0 for executable and libraries as the relocations are managed by the DyldInfo::rebase.

uint32_t	numberof_relocations () const
	Number of relocations associated with this section.

FLAGS	flags () const
	Section's flags masked with SECTION_FLAGS_MASK (see: Section::FLAGS)

TYPE	type () const
	Type of the section. This value can help to determine the purpose of the section (e.g. TYPE::INTERPOSING)

uint32_t	reserved1 () const
	According to the official `loader.h` file, this value is reserved for offset or index

uint32_t	reserved2 () const
	According to the official `loader.h` file, this value is reserved for count or sizeof

uint32_t	reserved3 () const
	This value is only present for 64 bits Mach-O files. In that case, the value is reserved.

std::vector< FLAGS >	flags_list () const
	Return the Section::flags as a list of Section::FLAGS.

uint32_t	raw_flags () const
	Section flags without applying the SECTION_FLAGS_MASK mask.

bool	has_segment () const
	Check if this section is correctly linked with a MachO::SegmentCommand.

SegmentCommand *	segment ()
	The segment associated with this section or a nullptr if not present.

const SegmentCommand *	segment () const

std::unique_ptr< SpanStream >	stream () const
	Return a stream over the content of this section.

void	clear (uint8_t v)
	Clear the content of this section by filling its values with the byte provided in parameter.

it_relocations	relocations ()
	Return an iterator over the MachO::Relocation associated with this section.

it_const_relocations	relocations () const

void	segment_name (const std::string &name)

void	address (uint64_t address)

void	alignment (uint32_t align)

void	relocation_offset (uint32_t offset)

void	numberof_relocations (uint32_t nb_reloc)

void	flags (uint32_t flags)

void	flags (std::vector< FLAGS > flags)

void	type (TYPE type)

void	reserved1 (uint32_t reserved1)

void	reserved2 (uint32_t reserved2)

void	reserved3 (uint32_t reserved3)

bool	has (FLAGS flag) const
	Check if the section has the given Section::FLAGS flag.

void	add (FLAGS flag)
	Append a Section::FLAGS to the current section.

void	remove (FLAGS flag)
	Remove a Section::FLAGS to the current section.

Section &	operator+= (FLAGS flag)

Section &	operator-= (FLAGS flag)

void	accept (Visitor &visitor) const override

Public Member Functions inherited from LIEF::Section
	Section ()=default

	Section (std::string name)

	~Section () override=default

Section &	operator= (const Section &)=default

	Section (const Section &)=default

virtual std::string	name () const
	section's name

virtual const std::string &	fullname () const
	Return the complete section's name which might trailing (`0`) bytes.

virtual void	size (uint64_t size)
	Change the section size.

virtual uint64_t	size () const
	section's size (size in the binary, not the virtual size)

virtual uint64_t	offset () const
	Offset in the binary.

virtual uint64_t	virtual_address () const
	Address where the section should be mapped.

virtual void	virtual_address (uint64_t virtual_address)

virtual void	name (std::string name)
	Change the section's name.

virtual void	offset (uint64_t offset)

double	entropy () const
	Section's entropy.

size_t	search (uint64_t integer, size_t pos, size_t size) const

size_t	search (const std::vector< uint8_t > &pattern, size_t pos=0) const

size_t	search (const std::string &pattern, size_t pos=0) const

size_t	search (uint64_t integer, size_t pos=0) const

std::vector< size_t >	search_all (uint64_t v, size_t size) const

std::vector< size_t >	search_all (uint64_t v) const

std::vector< size_t >	search_all (const std::string &v) const

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

Public Member Functions inherited from LIEF::Object
	Object ()

	Object (const Object &other)

Object &	operator= (const Object &other)

	Object (Object &&other) noexcept=default

Object &	operator= (Object &&other) noexcept=default

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

virtual	~Object ()

Static Public Attributes
static constexpr auto	FLAGS_MASK = uint32_t(0xffffff00u)

static constexpr auto	TYPE_MASK = uint32_t(0xff)

Static Public Attributes inherited from LIEF::Section
static constexpr size_t	npos = -1

Detailed Description

Class that represents a Mach-O section.

Member Typedef Documentation

◆ content_t

using LIEF::MachO::Section::content_t = std::vector<uint8_t>

◆ it_const_relocations

using LIEF::MachO::Section::it_const_relocations = const_ref_iterator<const relocations_t&, const Relocation*>

Iterator which outputs const Relocation&.

◆ it_relocations

using LIEF::MachO::Section::it_relocations = ref_iterator<relocations_t&, Relocation*>

Iterator which outputs Relocation&.

◆ relocations_t

using LIEF::MachO::Section::relocations_t = std::vector<std::unique_ptr<Relocation>>

Internal container for storing Mach-O Relocation.

Member Enumeration Documentation

◆ FLAGS

enum class LIEF::MachO::Section::FLAGS : uint64_t

strong

Enumerator
PURE_INSTRUCTIONS	Section contains only true machine instructions.
NO_TOC	Section contains coalesced symbols that are not to be in a ranlib table of contents.
STRIP_STATIC_SYMS	Ok to strip static symbols in this section in files with the MY_DYLDLINK flag.
NO_DEAD_STRIP	No dead stripping.
LIVE_SUPPORT	Blocks are live if they reference live blocks.
SELF_MODIFYING_CODE	Used with i386 code stubs written on by dyld.
DEBUG_INFO	A debug section.
SOME_INSTRUCTIONS	Section contains some machine instructions.
EXT_RELOC	Section has external relocation entries.
LOC_RELOC	Section has local relocation entries.

◆ TYPE

enum class LIEF::MachO::Section::TYPE : uint64_t

strong

Enumerator
REGULAR	Regular section.
ZEROFILL	Zero fill on demand section.
CSTRING_LITERALS	Section with literal C strings.
IS_4BYTE_LITERALS	Section with 4 byte literals.
IS_8BYTE_LITERALS	Section with 8 byte literals.
LITERAL_POINTERS	Section with pointers to literals.
NON_LAZY_SYMBOL_POINTERS	Section with non-lazy symbol pointers.
LAZY_SYMBOL_POINTERS	Section with lazy symbol pointers.
SYMBOL_STUBS	Section with symbol stubs, byte size of stub in the Reserved2 field.
MOD_INIT_FUNC_POINTERS	Section with only function pointers for initialization.
MOD_TERM_FUNC_POINTERS	Section with only function pointers for termination.
COALESCED	Section contains symbols that are to be coalesced.
GB_ZEROFILL	Zero fill on demand section (that can be larger than 4 gigabytes).
INTERPOSING	Section with only pairs of function pointers for interposing.
IS_16BYTE_LITERALS	Section with only 16 byte literals.
DTRACE_DOF	Section contains DTrace Object Format.
LAZY_DYLIB_SYMBOL_POINTERS	Section with lazy symbol pointers to lazy loaded dylibs.
THREAD_LOCAL_REGULAR	Thread local data section.
THREAD_LOCAL_ZEROFILL	Thread local zerofill section.
THREAD_LOCAL_VARIABLES	Section with thread local variable structure data.
THREAD_LOCAL_VARIABLE_POINTERS	Section with pointers to thread local structures.
THREAD_LOCAL_INIT_FUNCTION_POINTERS	Section with thread local variable initialization pointers to functions.
INIT_FUNC_OFFSETS	Section with 32-bit offsets to initializer functions.

Constructor & Destructor Documentation

◆ Section() [1/6]

LIEF::MachO::Section::Section ( )

◆ Section() [2/6]

LIEF::MachO::Section::Section ( const details::section_32 & section_cmd )

◆ Section() [3/6]

LIEF::MachO::Section::Section ( const details::section_64 & section_cmd )

◆ Section() [4/6]

LIEF::MachO::Section::Section ( std::string name )

◆ Section() [5/6]

LIEF::MachO::Section::Section	(	std::string	name,
		content_t	content )

◆ Section() [6/6]

LIEF::MachO::Section::Section ( const Section & copy )

◆ ~Section()

LIEF::MachO::Section::~Section ( )

override

Member Function Documentation

◆ accept()

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

overridevirtual

Implements LIEF::Object.

◆ add()

void LIEF::MachO::Section::add ( FLAGS flag )

Append a Section::FLAGS to the current section.

◆ address() [1/2]

uint64_t LIEF::MachO::Section::address ( ) const

inline

Virtual base address of the section.

◆ address() [2/2]

void LIEF::MachO::Section::address ( uint64_t address )

inline

◆ alignment() [1/2]

uint32_t LIEF::MachO::Section::alignment ( ) const

inline

Section alignment as a power of 2.

◆ alignment() [2/2]

void LIEF::MachO::Section::alignment ( uint32_t align )

inline

References LIEF::align().

◆ clear()

void LIEF::MachO::Section::clear ( uint8_t v )

Clear the content of this section by filling its values with the byte provided in parameter.

◆ content() [1/2]

span< const uint8_t > LIEF::MachO::Section::content ( ) const

overridevirtual

section's content

Reimplemented from LIEF::Section.

◆ content() [2/2]

void LIEF::MachO::Section::content ( const content_t & data )

overridevirtual

Update the content of the section.

Reimplemented from LIEF::Section.

◆ flags() [1/3]

FLAGS LIEF::MachO::Section::flags ( ) const

inline

Section's flags masked with SECTION_FLAGS_MASK (see: Section::FLAGS)

See also: flags

◆ flags() [2/3]

void LIEF::MachO::Section::flags ( std::vector< FLAGS > flags )

◆ flags() [3/3]

void LIEF::MachO::Section::flags ( uint32_t flags )

inline

◆ flags_list()

std::vector< FLAGS > LIEF::MachO::Section::flags_list ( ) const

Return the Section::flags as a list of Section::FLAGS.

See also: flags

◆ has()

bool LIEF::MachO::Section::has ( FLAGS flag ) const

Check if the section has the given Section::FLAGS flag.

◆ has_segment()

bool LIEF::MachO::Section::has_segment ( ) const

inline

Check if this section is correctly linked with a MachO::SegmentCommand.

◆ numberof_relocations() [1/2]

uint32_t LIEF::MachO::Section::numberof_relocations ( ) const

inline

Number of relocations associated with this section.

◆ numberof_relocations() [2/2]

void LIEF::MachO::Section::numberof_relocations ( uint32_t nb_reloc )

inline

◆ operator+=()

Section & LIEF::MachO::Section::operator+= ( FLAGS flag )

inline

◆ operator-=()

Section & LIEF::MachO::Section::operator-= ( FLAGS flag )

inline

◆ operator=()

Section & LIEF::MachO::Section::operator= ( Section copy )

◆ raw_flags()

uint32_t LIEF::MachO::Section::raw_flags ( ) const

inline

Section flags without applying the SECTION_FLAGS_MASK mask.

◆ relocation_offset() [1/2]

uint32_t LIEF::MachO::Section::relocation_offset ( ) const

inline

Offset of the relocation table. This value should be 0 for executable and libraries as the relocations are managed by the DyldInfo::rebase.

On the other hand, for object files (.o) this value should not be 0

See also: numberof_relocations; relocations

◆ relocation_offset() [2/2]

void LIEF::MachO::Section::relocation_offset ( uint32_t offset )

inline

◆ relocations() [1/2]

it_relocations LIEF::MachO::Section::relocations ( )

inline

Return an iterator over the MachO::Relocation associated with this section.

This iterator is likely to be empty of executable and libraries while it should not for object files (.o)

◆ relocations() [2/2]

it_const_relocations LIEF::MachO::Section::relocations ( ) const

inline

◆ remove()

void LIEF::MachO::Section::remove ( FLAGS flag )

Remove a Section::FLAGS to the current section.

◆ reserved1() [1/2]

uint32_t LIEF::MachO::Section::reserved1 ( ) const

inline

According to the official loader.h file, this value is reserved for offset or index

◆ reserved1() [2/2]

void LIEF::MachO::Section::reserved1 ( uint32_t reserved1 )

inline

◆ reserved2() [1/2]

uint32_t LIEF::MachO::Section::reserved2 ( ) const

inline

According to the official loader.h file, this value is reserved for count or sizeof

◆ reserved2() [2/2]

void LIEF::MachO::Section::reserved2 ( uint32_t reserved2 )

inline

◆ reserved3() [1/2]

uint32_t LIEF::MachO::Section::reserved3 ( ) const

inline

This value is only present for 64 bits Mach-O files. In that case, the value is reserved.

◆ reserved3() [2/2]

void LIEF::MachO::Section::reserved3 ( uint32_t reserved3 )

inline

◆ segment() [1/2]

SegmentCommand * LIEF::MachO::Section::segment ( )

inline

The segment associated with this section or a nullptr if not present.

◆ segment() [2/2]

const SegmentCommand * LIEF::MachO::Section::segment ( ) const

inline

◆ segment_name() [1/2]

const std::string & LIEF::MachO::Section::segment_name ( ) const

Return the name of the segment linked to this section.

◆ segment_name() [2/2]

void LIEF::MachO::Section::segment_name ( const std::string & name )

◆ stream()

std::unique_ptr< SpanStream > LIEF::MachO::Section::stream ( ) const

Return a stream over the content of this section.

◆ swap()

void LIEF::MachO::Section::swap ( Section & other )

noexcept

◆ type() [1/2]

TYPE LIEF::MachO::Section::type ( ) const

inline

Type of the section. This value can help to determine the purpose of the section (e.g. TYPE::INTERPOSING)

◆ type() [2/2]

void LIEF::MachO::Section::type ( TYPE type )

inline

Member Data Documentation

◆ FLAGS_MASK

auto LIEF::MachO::Section::FLAGS_MASK = uint32_t(0xffffff00u)

staticconstexpr

◆ TYPE_MASK

auto LIEF::MachO::Section::TYPE_MASK = uint32_t(0xff)

staticconstexpr

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

MachO/Section.hpp

Public Types

Public Member Functions

Static Public Attributes

Detailed Description

Member Typedef Documentation

◆ content_t

◆ it_const_relocations

◆ it_relocations

◆ relocations_t

Member Enumeration Documentation

◆ FLAGS

◆ TYPE

Constructor & Destructor Documentation

◆ Section() [1/6]

◆ Section() [2/6]

◆ Section() [3/6]

◆ Section() [4/6]

◆ Section() [5/6]

◆ Section() [6/6]

◆ ~Section()

Member Function Documentation

◆ accept()

◆ add()

◆ address() [1/2]

◆ address() [2/2]

◆ alignment() [1/2]

◆ alignment() [2/2]

◆ clear()

◆ content() [1/2]

◆ content() [2/2]

◆ flags() [1/3]

◆ flags() [2/3]

◆ flags() [3/3]

◆ flags_list()

◆ has()

◆ has_segment()

◆ numberof_relocations() [1/2]

◆ numberof_relocations() [2/2]

◆ operator+=()

◆ operator-=()

◆ operator=()

◆ raw_flags()

◆ relocation_offset() [1/2]

◆ relocation_offset() [2/2]

◆ relocations() [1/2]

◆ relocations() [2/2]

◆ remove()

◆ reserved1() [1/2]

◆ reserved1() [2/2]

◆ reserved2() [1/2]

◆ reserved2() [2/2]

◆ reserved3() [1/2]

◆ reserved3() [2/2]

◆ segment() [1/2]

◆ segment() [2/2]

◆ segment_name() [1/2]

◆ segment_name() [2/2]

◆ stream()

◆ swap()

◆ type() [1/2]

◆ type() [2/2]

Member Data Documentation

◆ FLAGS_MASK

◆ TYPE_MASK