Architecture-independent base for helper class to write function text. More...

Inheritance diagram for tpde::FunctionWriterBase:

Public Member Functions
SecRef	get_sec_ref () const noexcept
	Get the SecRef of the current section.

DataSection &	get_section () const noexcept
	Get the current section.

void	switch_section (DataSection &new_section) noexcept
	Switch section writer to new section; must be flushed.

size_t	offset () const noexcept
	Get the current offset into the section.

size_t	allocated_size () const noexcept
	Get the current allocated size of the section.

u8 *	begin_ptr () noexcept
	Pointer to beginning of section data.

u8 *&	cur_ptr () noexcept
	Modifiable pointer to current writing position of the section.

void	remove_prologue_bytes (u32 start, u32 size) noexcept
	Remove bytes and adjust labels/relocations accordingly.

Labels
Label	label_create () noexcept
	Create a new unplaced label.

void	label_place (Label label, u32 off) noexcept
	Place unplaced label at the specified offset inside the section.

void	label_ref (Label label, u32 off, LabelFixupKind kind) noexcept
	Reference label at given offset inside the code section.

Itanium Exception ABI
void	except_add_call_site (u32 text_off, u32 len, Label landing_pad, bool is_cleanup) noexcept
	add an entry to the call-site table must be called in strictly increasing order wrt text_off

void	except_add_cleanup_action () noexcept
	Add a cleanup action to the action table MUST be the last one.

void	except_add_action (bool first_action, SymRef type_sym) noexcept
	add an action to the action table An invalid SymRef signals a catch(...)

Protected Attributes
u32	func_begin
	Begin offset of the current function.

u32	reloc_begin
	Begin of relocations for current function.

u32	label_skew
	Offset to subtract from all label offsets.

util::SmallVector< u32 >	label_offsets
	Label offsets into section, ~0u indicates unplaced label.

util::SmallVector< LabelFixup >	label_fixups
	Fixups for labels placed after their first use, processed at function end.

u32	growth_size = 0x10000
	Growth size for more_space; adjusted exponentially after every grow.

DWARF CFI
void	eh_advance_raw (u64 size_units) noexcept
	Write CFA_advance_loc; size must be scaled by code alignment factor.

void	eh_advance (u64 size) noexcept
	Write CFA_advance_loc with code alignment factor 1.

Detailed Description

Architecture-independent base for helper class to write function text.

Definition at line 31 of file FunctionWriter.hpp.

Member Function Documentation

u8 *& tpde::FunctionWriterBase::cur_ptr ( )

inlinenoexcept

Modifiable pointer to current writing position of the section.

Must not be moved beyond the allocated region.

Definition at line 155 of file FunctionWriter.hpp.

void tpde::FunctionWriterBase::remove_prologue_bytes	(	u32	start,
		u32	size )

noexcept

Remove bytes and adjust labels/relocations accordingly.

The covered region must be before the first label, i.e., this function can only be used to cut out bytes from the function prologue.

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