lkml.org 
[lkml]   [2020]   [Mar]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 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

\
 
 \ /
  Last update: 2020-03-02 13:45    [W:0.078 / U:0.548 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site