g++ kernel

[prabu]

I'm using the g++ that came with RH linux 8.

I had wrote my runtime support for constructors.
My Problem is with the Desctructors.

I can't add the Destructor for the Global Object classes.
If i put a destructor. I get some error in linking.

" undefined symbols. __dso_handle and __cxa_atexit "
__dso_handle is in data section.
__cxa_atexit may be a function.

I found this after doing some search in the "libc" with "objdump"

when I dump my kernel i cant found any .dtors section.

I just defined a variable and a dummy function as
extern "C" {
void *__dso_handle;
void __cxa_atexit() {

}
}

Now my linker is cheated by me.

BUT BUT BUT. HOW can I handle it properly.

When and how my destructors can be called without a .dtors section.

help me please...
thank you.

[Solar]

__cxa_atexit hints at an error in your compiler flags. I'd daresay you forgot to add -ffreestanding, --no-startup or a similar necessary option. (Can't test ATM which one results in said error message when omitted.)

__cxa_atexit is a runtime support function, which should not be linked into your binary at all since in kernel space you have to runtime support save your own.

Just a very humble IMHO in the earliest morning and without having tested this...

PS: Erm... which "libc" did you objdump? I'm smelling something here. You are aware you mustn't just link the RH libc into your kernel image, are you?

[Candy]

__cxa_atexit hints at an error in your compiler flags. I'd daresay you forgot to add -ffreestanding, --no-startup or a similar necessary option. (Can't test ATM which one results in said error message when omitted.)

__cxa_atexit is a runtime support function, which should not be linked into your binary at all since in kernel space you have to runtime support save your own.

for a guess, -fno-cxa-atexit or something similar. Man gcc.