netdev - [PATCH bpf-next v4 0/2] bpf, arm64: fix bpf line info

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Date:   Sat, 26 Feb 2022 20:19:04 +0800
From:   Hou Tao <houtao1@...wei.com>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Will Deacon <will@...nel.org>
CC:     Song Liu <songliubraving@...com>,
        John Fastabend <john.fastabend@...il.com>,
        Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andrii@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, <netdev@...r.kernel.org>,
        <bpf@...r.kernel.org>, <houtao1@...wei.com>,
        Zi Shen Lim <zlim.lnx@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Ard Biesheuvel <ard.biesheuvel@....com>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH bpf-next v4 0/2] bpf, arm64: fix bpf line info

Hi,

The patchset addresses two issues in bpf line info for arm64:

(1) insn_to_jit_off only considers the body itself and ignores
    prologue before the body. Fixed in patch #1.

(2) insn_to_jit_off passed to bpf_prog_fill_jited_linfo() is
    calculated in instruction granularity instead of bytes
    granularity. Fixed in patch #2.

Comments are always welcome.

Regards,
Tao

Change Log:
v4:
 * patch #2: convert ctx.offset into byte offset before call
   bpf_prog_fill_jited_linfo() instead of converting it back and forth.

v3: https://lore.kernel.org/bpf/20220208012539.491753-1-houtao1@huawei.com
 * patch #2: explain why bpf2a64_offset() needs update
 * add Fixes tags in both patches

v2: https://lore.kernel.org/bpf/20220125105707.292449-1-houtao1@huawei.com
 * split into two independent patches (from Daniel)
 * use AARCH64_INSN_SIZE instead of defining INSN_SIZE

v1: https://lore.kernel.org/bpf/20220104014236.1512639-1-houtao1@huawei.com

Hou Tao (2):
  bpf, arm64: call build_prologue() first in first JIT pass
  bpf, arm64: feed byte-offset into bpf line info

 arch/arm64/net/bpf_jit_comp.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

-- 
2.18.2