From: Eduard Zingerman <eddyz87@gmail.com>
To: Alan Maguire <alan.maguire@oracle.com>,
andrii@kernel.org, jolsa@kernel.org, acme@redhat.com,
quentin@isovalent.com
Cc: mykolal@fb.com, ast@kernel.org, daniel@iogearbox.net,
martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev,
john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com,
haoluo@google.com, houtao1@huawei.com, bpf@vger.kernel.org,
masahiroy@kernel.org, mcgrof@kernel.org, nathan@kernel.org
Subject: Re: [PATCH v3 bpf-next 11/11] bpftool: support displaying relocated-with-base split BTF
Date: Sat, 11 May 2024 02:32:39 -0700 [thread overview]
Message-ID: <4cf9a39ff865f8ad10feba6e4666b60eada41bb0.camel@gmail.com> (raw)
In-Reply-To: <20240510103052.850012-12-alan.maguire@oracle.com>
On Fri, 2024-05-10 at 11:30 +0100, Alan Maguire wrote:
> If the -R <base_btf> option is used, we can display BTF that has been
> generated with distilled base BTF in its relocated form. For example
> for bpf_testmod.ko (which is built as an out-of-tree module, so has
> a distilled .BTF.base section:
>
> bpftool btf dump file bpf_testmod.ko
>
> Alternatively, we can display content relocated with
> (a possibly changed) base BTF via
>
> bpftool btf dump -R /sys/kernel/btf/vmlinux bpf_testmod.ko
>
> The latter mirrors how the kernel will handle such split
> BTF; it relocates its representation with the running
> kernel, and if successful, renumbers BTF ids to reference
> the current vmlinux BTF.
>
> Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
> ---
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
next prev parent reply other threads:[~2024-05-11 9:32 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-10 10:30 [PATCH v3 bpf-next 00/11] bpf: support resilient split BTF Alan Maguire
2024-05-10 10:30 ` [PATCH v3 bpf-next 01/11] libbpf: add btf__distill_base() creating split BTF with distilled base BTF Alan Maguire
2024-05-10 19:14 ` Eduard Zingerman
2024-05-13 17:23 ` Alan Maguire
2024-05-10 10:30 ` [PATCH v3 bpf-next 02/11] selftests/bpf: test distilled base, split BTF generation Alan Maguire
2024-05-10 10:30 ` [PATCH v3 bpf-next 03/11] libbpf: add btf__parse_opts() API for flexible BTF parsing Alan Maguire
2024-05-11 9:40 ` Eduard Zingerman
2024-05-13 16:25 ` Alan Maguire
2024-05-13 16:59 ` Eduard Zingerman
2024-05-10 10:30 ` [PATCH v3 bpf-next 04/11] bpftool: support displaying raw split BTF using base BTF section as base Alan Maguire
2024-05-13 10:57 ` Quentin Monnet
2024-05-10 10:30 ` [PATCH v3 bpf-next 05/11] resolve_btfids: use .BTF.base ELF section as base BTF if -B option is used Alan Maguire
2024-05-10 10:30 ` [PATCH v3 bpf-next 06/11] kbuild, bpf: add module-specific pahole/resolve_btfids flags for distilled base BTF Alan Maguire
2024-05-10 10:30 ` [PATCH v3 bpf-next 07/11] libbpf: split BTF relocation Alan Maguire
2024-05-10 22:26 ` Eduard Zingerman
2024-05-13 17:51 ` Alan Maguire
2024-05-10 10:30 ` [PATCH v3 bpf-next 08/11] selftests/bpf: extend distilled BTF tests to cover " Alan Maguire
2024-05-10 22:46 ` Eduard Zingerman
2024-05-10 10:30 ` [PATCH v3 bpf-next 09/11] module, bpf: store BTF base pointer in struct module Alan Maguire
2024-05-10 10:30 ` [PATCH v3 bpf-next 10/11] libbpf,bpf: share BTF relocate-related code with kernel Alan Maguire
2024-05-11 1:46 ` Eduard Zingerman
2024-05-14 16:14 ` Alan Maguire
2024-05-15 6:56 ` Eduard Zingerman
2024-05-10 10:30 ` [PATCH v3 bpf-next 11/11] bpftool: support displaying relocated-with-base split BTF Alan Maguire
2024-05-11 9:32 ` Eduard Zingerman [this message]
2024-05-13 11:12 ` Quentin Monnet
2024-05-14 16:33 ` Alan Maguire
2024-05-11 9:28 ` [PATCH v3 bpf-next 00/11] bpf: support resilient " Eduard Zingerman
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