Re: [PATCH] kbuild: Remove debug info from kallsyms linking

[Arnaldo Carvalho de Melo]

Em Tue, Mar 03, 2020 at 08:29:39PM -0800, Andrii Nakryiko escreveu:
> On Tue, Mar 3, 2020 at 6:11 PM Kees Cook <keescook@xxxxxxxxxxxx> wrote:
> > On Tue, Mar 03, 2020 at 01:50:52PM -0800, Andrii Nakryiko wrote:
> > > On Tue, Mar 3, 2020 at 1:06 PM Kees Cook <keescook@xxxxxxxxxxxx> wrote:
> > > > On Mon, Mar 02, 2020 at 10:55:04PM -0800, Andrii Nakryiko wrote:
> > > > > On Mon, Feb 24, 2020 at 9:17 PM Kees Cook <keescook@xxxxxxxxxxxx> wrote:
> > > > > >         LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${1}
> > > > > >
> > > > > >         # dump .BTF section into raw binary file to link with final vmlinux

> > > > BTW, in looking at BTF generation, why is this cut up into three steps:
> > > > pahole, objcopy, objcopy... shouldn't pahole just gross an output method
> > > > to dump the final .o file? That would be MUCH nicer. Especially since
> > > > the first step ends up rewriting (?!) the original ELF. This is a lot of
> > > > needless IO...

> > > Just mostly historical reasons, that was the interface pahole already
> > > supported. I agree that it's a good idea to teach pahole to just emit
> > > a binary BTF section dump.

> > /me adds it to giant TODO list ;)

Mine is giant as well, but adding it anyway...

:-)

- Arnaldo