[patch] Implement __cxa_atexit
Jeff Johnston
jjohnstn@redhat.com
Sun Sep 12 19:34:00 GMT 2004
Patch checked in with modifications to make it compile for _REENT_SMALL.
Thanks,
-- Jeff J.
Paul Brook wrote:
> The attached patch implements __cxa_atexit and __cxa_finalize.
>
> As the name suggests these are used by C++ code to register static object
> destructors. They are documented in section 3.3.5 of the C++ ABI
> (http://www.codesourcery.com/cxx-abi/abi.html)
>
> Despite this they are generally provided by the C library, not the C++ runtime
> library.
>
> I basically took the exitsing atexit/on_exit implementation, broke it out into
> separate files, and added the extra _dso_handle field. I also modified the
> _REENT_SMALL case to allow more than 32 handlers to be registered.
>
> Tested with cross to arm-none-elf.
> Ok?
>
> Paul
>
> 2004-09-03 Paul Brook <paul@codesourcery.com>
>
> * libc/include/sys/reent.h (struct _on_exit_args): Add _dso_handle
> and _is_cxa.
> (struct _atexit): Add _next when _REENT_SMALL.
> (struct _reent): Add _atexit0 when _REENT_SMALL.
> (_REENT_INIT_PTR): Adjust.
> * libc/stdlib/Makefile.am (GENERAL_SOURCES): Add __atexit.c and
> __call_exit.c.
> (EXTENDED_SOURCES): Add cxa_atexit.c and cxa_finalize.c.
> * libc/stdlib/Makefile.in: Regenerate.
> * libc/stdlib/__atexit.c: New file.
> * libc/stdlib/__call_atexit.c: New file.
> * libc/stdlib/atexit.h: Remove old definitions. Add new.
> * libc/stdlib/atexit.c (atexit): Use __register_exitproc.
> * libc/stdlib/cxa_atexit.c: New file.
> * libc/stdlib/cxa_finalize.c: New file.
> * libc/stdlib/exit.c (exit): Use __call_exitprocs.
> * libc/stdlib/on_exit.c (on_exit): Use __register_exitproc.
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