linux-kernel - Re: [PATCH bpf-next v2 2/7] bpf: JIT helpers for fmod

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Message-ID: <20200304151145.GB9984@chromium.org>
Date:   Wed, 4 Mar 2020 16:11:45 +0100
From:   KP Singh <kpsingh@...omium.org>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     linux-security-module@...r.kernel.org,
        open list <linux-kernel@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Paul Turner <pjt@...gle.com>, Jann Horn <jannh@...gle.com>,
        Florent Revest <revest@...omium.org>,
        Brendan Jackman <jackmanb@...omium.org>
Subject: Re: [PATCH bpf-next v2 2/7] bpf: JIT helpers for fmod_ret progs

On 03-Mär 20:52, Andrii Nakryiko wrote:
> On Tue, Mar 3, 2020 at 5:56 PM KP Singh <kpsingh@...omium.org> wrote:
> >
> > From: KP Singh <kpsingh@...gle.com>
> >
> > * Split the invoke_bpf program to prepare for special handling of
> >   fmod_ret programs introduced in a subsequent patch.
> > * Move the definition of emit_cond_near_jump and emit_nops as they are
> >   needed for fmod_ret.
> > * Refactor branch target alignment into its own function
> >   align16_branch_target.
> >
> > Signed-off-by: KP Singh <kpsingh@...gle.com>
> > ---
> 
> I trust invoke_bpf_prog logic didn't change, code was just moved around, right?

Yes, that's correct.

- KP

> 
> Acked-by: Andrii Nakryiko <andriin@...com>
> 
> 
> >  arch/x86/net/bpf_jit_comp.c | 148 +++++++++++++++++++++---------------
> >  1 file changed, 85 insertions(+), 63 deletions(-)
> >
> 
> [...]