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

Inheritance diagram for tpde::FunctionWriterBase:

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

DataSection &	get_section () const
	Get the current section.

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

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

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

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

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

void	reloc (SymRef sym, u32 type, u64 off, i64 addend=0)
	Record relocation at the given offset.

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

Labels
Label	label_create ()
	Create a new unplaced label.

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

void	label_ref (Label label, u32 off, LabelFixupKind kind)
	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)
	add an entry to the call-site table must be called in strictly increasing order wrt text_off

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

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

Protected Member Functions
JumpTable &	alloc_jump_table (u32 size, Reg idx, Reg tmp)
	Allocate a jump table for the current location.

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)
	Write CFA_advance_loc; size must be scaled by code alignment factor.

void	eh_advance (u64 size)
	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 ( )

inline

Modifiable pointer to current writing position of the section.

Must not be moved beyond the allocated region.

Definition at line 172 of file FunctionWriter.hpp.

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

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: