On Thu, Nov 25, 2021 at 09:42:53PM +0100, Florian Weimer wrote:
> I've included a simplified version below, based on the _dl_find_object
> patch for glibc.
>
> This is a bit difficult to test, but I ran a full toolchain bootstrap
> with GCC + glibc on all glibc-supported architectures (except Hurd and
> one m68k variant; they do not presnetly build, see Joseph's testers).
>
> I also tested this by copying the respective GCC-built libgcc_s into a
> glibc build tree for run-time testing on i686-linux-gnu and
> x86_64-linux-gnu. There weren't any issues. There are a buch of
> unwinder tests in glibc, giving at least some coverage.
See the comment I've just sent on this patch.
If the DLFO_STRUCT_HAS_EH_DBASE and DLFO_STRUCT_HAS_EH_COUNT
macros are gone, we'd need to use __GLIBC_PREREQ or configure test
or combination of the two.
Otherwise LGTM.
> Subject: libgcc: Use _dl_find_object in _Unwind_Find_FDE
>
> libgcc/ChangeLog:
>
> * unwind-dw2-fde-dip.c (_Unwind_Find_FDE): Call _dl_find_object
> if available.
Jakub
