From: Alexei Starovoitov <alexei.starovoitov@gmail.com>
To: "Wangnan (F)" <wangnan0@huawei.com>
Cc: He Kuang <hekuang@huawei.com>,
Alexei Starovoitov <ast@plumgrid.com>,
pi3orama <pi3orama@163.com>,
llvm-dev@lists.llvm.org,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [llvm-dev] [LLVMdev] Cc llvmdev: Re: llvm bpf debug info. Re: [RFC PATCH v4 3/3] bpf: Introduce function for outputing data to perf event
Date: Wed, 5 Aug 2015 23:50:02 -0700 [thread overview]
Message-ID: <20150806065001.GA52262@Alexeis-MBP.westell.com> (raw)
In-Reply-To: <55C2E31E.7060407@huawei.com>
On Thu, Aug 06, 2015 at 12:31:26PM +0800, Wangnan (F) wrote:
>
>
> What about hacking ELF binary in memory?
>
> 1. load the object into memory;
> 2. twist the machine code to EM_X86_64;
> 3. load it using elf_begin;
> 4. return the twested elf memory image using libdwfl's find_elf callback.
>
> Then libdw will recognise BPF's object file as a X86_64 object file. If
> required,
> relocation sections can also be twisted in this way. Should not very hard
> since
> we can only consider one relocation type.
>
> Then let's start thinking how to introduce EM_BPF. We can rely on the
> hacking
> until EM_BPF symbol reaches elfutils in perf.
>
> What do you think?
sounds crazy, but may work. let's try it :)
next prev parent reply other threads:[~2015-08-06 6:50 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-10 10:03 [RFC PATCH v4 0/3] Make eBPF programs output " He Kuang
2015-07-10 10:03 ` [RFC PATCH v4 1/3] tracing/events: Fix wrong sample output by storing array length instead of size He Kuang
2015-07-17 14:32 ` Steven Rostedt
2015-07-17 17:24 ` Sara Rostedt
2015-07-17 18:13 ` Steven Rostedt
2015-07-23 19:36 ` Alex Bennée
2015-07-10 10:03 ` [RFC PATCH v4 2/3] tools lib traceevent: Add function to get dynamic arrays length He Kuang
2015-07-10 10:03 ` [RFC PATCH v4 3/3] bpf: Introduce function for outputing data to perf event He Kuang
2015-07-10 22:10 ` Alexei Starovoitov
2015-07-13 4:36 ` He Kuang
2015-07-13 13:52 ` Namhyung Kim
2015-07-13 14:01 ` pi3orama
2015-07-13 14:09 ` Namhyung Kim
2015-07-13 14:29 ` pi3orama
2015-07-14 1:43 ` Alexei Starovoitov
2015-07-14 11:54 ` He Kuang
2015-07-17 4:11 ` Alexei Starovoitov
2015-07-17 4:14 ` Wangnan (F)
2015-07-17 4:27 ` Alexei Starovoitov
2015-07-23 11:54 ` He Kuang
2015-07-23 20:49 ` llvm bpf debug info. " Alexei Starovoitov
2015-07-24 3:20 ` Alexei Starovoitov
2015-07-24 4:16 ` He Kuang
2015-07-25 10:04 ` He Kuang
2015-07-28 2:18 ` Alexei Starovoitov
2015-07-29 9:38 ` He Kuang
2015-07-29 17:13 ` Alexei Starovoitov
2015-07-29 20:00 ` pi3orama
2015-07-29 22:20 ` Alexei Starovoitov
2015-07-31 10:18 ` Wangnan (F)
2015-07-31 10:20 ` [LLVM PATCH] BPF: add FRAMEADDR support Wang Nan
2015-07-31 10:21 ` [LLVM CLANG PATCH] BPF: add __builtin_bpf_typeid() Wang Nan
2015-07-31 10:48 ` llvm bpf debug info. Re: [RFC PATCH v4 3/3] bpf: Introduce function for outputing data to perf event pi3orama
2015-08-03 19:44 ` Alexei Starovoitov
2015-08-04 9:01 ` Cc llvmdev: " Wangnan (F)
2015-08-05 1:58 ` Wangnan (F)
2015-08-05 2:05 ` Wangnan (F)
2015-08-05 6:51 ` [LLVMdev] " Wangnan (F)
2015-08-05 7:11 ` Alexei Starovoitov
2015-08-05 8:28 ` Wangnan (F)
2015-08-06 3:22 ` [llvm-dev] " Alexei Starovoitov
2015-08-06 4:35 ` Wangnan (F)
2015-08-06 6:55 ` Alexei Starovoitov
2015-08-12 2:34 ` Wangnan (F)
2015-08-12 4:57 ` [llvm-dev] " Alexei Starovoitov
2015-08-12 5:28 ` Wangnan (F)
2015-08-12 13:15 ` Brenden Blanco
2015-08-13 6:24 ` Wangnan (F)
2015-08-05 8:59 ` [LLVMdev] Cc llvmdev: " He Kuang
2015-08-06 3:41 ` [llvm-dev] " Alexei Starovoitov
2015-08-06 4:31 ` Wangnan (F)
2015-08-06 6:50 ` Alexei Starovoitov [this message]
2015-07-13 8:29 ` Peter Zijlstra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150806065001.GA52262@Alexeis-MBP.westell.com \
--to=alexei.starovoitov@gmail.com \
--cc=ast@plumgrid.com \
--cc=hekuang@huawei.com \
--cc=linux-kernel@vger.kernel.org \
--cc=llvm-dev@lists.llvm.org \
--cc=pi3orama@163.com \
--cc=wangnan0@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome