cplusplus.h File Reference

Defines C++ runtime functions and structures needed for linking C++ code in the kernel. More...

#include <cstdint>

Go to the source code of this file.

Classes
struct	MaxOS::runtime::atexit_func_entry_t
	An entry in the list of functions to call at program exit (not used in kernel but needed for linking) More...

Typedefs
typedef void(*	MaxOS::runtime::constructor) ()
	A pointer to a constructor function.
typedef unsigned	MaxOS::runtime::uarch_t
	An unsigned architecture specific type.

Functions
int	MaxOS::runtime::__cxa_atexit (void(*f)(void *), void *objptr, void *dso)
	Register a function to be called at program exit.
void	MaxOS::runtime::__cxa_finalize (void *f)
	Finalise all global objects by calling their destructors.
void	MaxOS::runtime::__stack_chk_fail (void)
	Called when a stack buffer overflow is detected.

Variables
uintptr_t	MaxOS::runtime::__stack_chk_guard = 0x595e9fbd94fda766
	The stack canary value used to detect stack buffer overflows (.

Detailed Description

Defines C++ runtime functions and structures needed for linking C++ code in the kernel.

See also

https://wiki.osdev.org/C%2B%2B - code adapted from here

Date

30th March 2025

Author

Max Tyson

Definition in file cplusplus.h.

Typedef Documentation

constructor

typedef void(* MaxOS::runtime::constructor) ()

A pointer to a constructor function.

Definition at line 19 of file cplusplus.h.

uarch_t

typedef unsigned MaxOS::runtime::uarch_t

An unsigned architecture specific type.

Definition at line 20 of file cplusplus.h.

Function Documentation

__cxa_atexit()

int MaxOS::runtime::__cxa_atexit	(	void(*)(void *)	f,
		void *	objptr,
		void *	dso
	)

Register a function to be called at program exit.

Parameters

f	The function to call
objptr	The object pointer to pass to the function
dso	The DSO handle (not used)

Returns

int 0 on success, non-zero on failure

References MaxOS::runtime::__cxa_atexit().

Referenced by MaxOS::runtime::__cxa_atexit().

__cxa_finalize()

void MaxOS::runtime::__cxa_finalize

(

void *

f

)

Finalise all global objects by calling their destructors.

Parameters

f	The DSO handle to finalise (nullptr for all)

References MaxOS::runtime::__cxa_finalize().

Referenced by MaxOS::runtime::__cxa_finalize().

Variable Documentation

__stack_chk_guard

uintptr_t MaxOS::runtime::__stack_chk_guard = 0x595e9fbd94fda766

The stack canary value used to detect stack buffer overflows (.

Todo:

make random at runtime)

Definition at line 52 of file cplusplus.h.