Re: [PATCH] libbpf: fix readelf output parsing on powerpc with recent binutils

From: Daniel Borkmann
Date: Mon Dec 02 2019 - 04:37:58 EST


On Mon, Dec 02, 2019 at 04:53:26PM +1100, Michael Ellerman wrote:
> Aurelien Jarno <aurelien@xxxxxxxxxxx> writes:
> > On powerpc with recent versions of binutils, readelf outputs an extra
> > field when dumping the symbols of an object file. For example:
> >
> > 35: 0000000000000838 96 FUNC LOCAL DEFAULT [<localentry>: 8] 1 btf_is_struct
> >
> > The extra "[<localentry>: 8]" prevents the GLOBAL_SYM_COUNT variable to
> > be computed correctly and causes the checkabi target to fail.
> >
> > Fix that by looking for the symbol name in the last field instead of the
> > 8th one. This way it should also cope with future extra fields.
> >
> > Signed-off-by: Aurelien Jarno <aurelien@xxxxxxxxxxx>
> > ---
> > tools/lib/bpf/Makefile | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
>
> Thanks for fixing that, it's been on my very long list of test failures
> for a while.
>
> Tested-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>

Looks good & also continues to work on x86. Applied, thanks!