Messages in this thread | | | Date | Mon, 2 Mar 2020 06:44:42 -0600 | From | Segher Boessenkool <> | Subject | Re: eh_frame confusion |
| |
On Mon, Mar 02, 2020 at 11:56:05AM +0100, Rasmus Villemoes wrote: > I'm building a ppc32 kernel, and noticed that after upgrading from gcc-7 > to gcc-8 all object files now end up having .eh_frame section.
Since GCC 8, we enable -fasynchronous-unwind-tables by default for PowerPC. See https://gcc.gnu.org/r259298 .
> For > vmlinux, that's not a problem, because they all get discarded in > arch/powerpc/kernel/vmlinux.lds.S . However, they stick around in > modules, which doesn't seem to be useful - given that everything worked > just fine with gcc-7, and I don't see anything in the module loader that > handles .eh_frame.
It is useful for debugging. Not many people debug the kernel like this, of course.
Segher
| |