From: Joe Lawrence <joe.lawrence@redhat.com>
To: Joao Moreira <jmoreira@suse.de>
Cc: live-patching@vger.kernel.org, mbenes@suse.cz, pmladek@suse.cz,
jikos@suse.cz, nstange@suse.de, jpoimboe@redhat.com,
khlebnikov@yandex-team.ru, jeyu@kernel.org, matz@suse.de,
linux-kernel@vger.kernel.org, yamada.masahiro@socionext.com,
linux-kbuild@vger.kernel.org, michal.lkml@markovi.net
Subject: Re: [PATCH v2 7/8] livepatch: Add sample livepatch module
Date: Mon, 18 Mar 2019 15:21:13 -0400 [thread overview]
Message-ID: <20190318192113.GA23220@redhat.com> (raw)
In-Reply-To: <20190301141313.15057-8-jmoreira@suse.de>
On Fri, Mar 01, 2019 at 11:13:12AM -0300, Joao Moreira wrote:
> From: Josh Poimboeuf <jpoimboe@redhat.com>
>
> Add a new livepatch sample in samples/livepatch/ to make use of
> symbols that must be post-processed to enable load-time relocation
> resolution. As the new sample is to be used as an example, it is
> annotated with KLP_MODULE_RELOC and with KLP_SYMPOS macros.
>
> The livepatch sample updates the function cmdline_proc_show to
> print the string referenced by the symbol saved_command_line
> appended by the string "livepatch=1".
>
> Update livepatch-sample.c to remove livepatch MODULE_INFO
> statement.
>
> [jmoreira:
> * update module to use KLP_SYMPOS
> * Comments on symbol resolution scheme
> * Update Makefile
> * Remove MODULE_INFO statement
> * Changelog
> ]
>
> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
> Signed-off-by: Joao Moreira <jmoreira@suse.de>
> ---
> samples/livepatch/Makefile | 2 +
> samples/livepatch/livepatch-annotated-sample.c | 113 +++++++++++++++++++++++++
> 2 files changed, 115 insertions(+)
> create mode 100644 samples/livepatch/livepatch-annotated-sample.c
>
> [ ... snip ... ]
>
> diff --git a/samples/livepatch/livepatch-annotated-sample.c b/samples/livepatch/livepatch-annotated-sample.c
> new file mode 100644
> index 000000000000..44d9e9542db1
> --- /dev/null
> +++ b/samples/livepatch/livepatch-annotated-sample.c
Super small nit, but I shuffled the annotated-sample code around so it
better matched the original sample. This minimized the diff when I
compared the two versions to see what was added for sympos annotation:
[squash] livepatch: adjust annotated sample formatting
https://github.com/torvalds/linux/commit/ce49c70e85cf87e513de3bcf64953de191c3c6d7
> [ ... snip ... ]
>
> +static int livepatch_init(void)
> +{
> + int ret;
> +
> + ret = klp_register_patch(&patch);
> + if (ret)
> + return ret;
> + ret = klp_enable_patch(&patch);
> + if (ret) {
> + WARN_ON(klp_unregister_patch(&patch));
> + return ret;
> + }
> + return 0;
> +}
> +
> +static void livepatch_exit(void)
> +{
> + WARN_ON(klp_unregister_patch(&patch));
> +}
v5.0 deprecates klp_register_patch(), klp_unregister_patch(), and
klp_disable_patch(), so adjust the sample accordingly:
[squash] livepatch: rebase the annotated sample
https://github.com/torvalds/linux/commit/fc04952376cfd8281eb663bd2ce18fec27eb42b2
-- Joe
next prev parent reply other threads:[~2019-03-18 19:21 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190301141313.15057-1-jmoreira@suse.de>
2019-03-18 19:18 ` [PATCH v2 0/8] klp-convert Joe Lawrence
2019-03-26 20:18 ` Joao Moreira
2019-03-26 21:03 ` Joe Lawrence
2019-04-04 11:49 ` Miroslav Benes
2019-04-04 13:19 ` Joe Lawrence
[not found] ` <20190301141313.15057-3-jmoreira@suse.de>
2019-03-18 19:19 ` [PATCH v2 2/8] kbuild: Support for Symbols.list creation Joe Lawrence
2019-03-20 19:08 ` Miroslav Benes
2019-03-26 14:40 ` Joao Moreira
2019-03-26 16:15 ` Joe Lawrence
2019-03-26 18:13 ` Joao Moreira
2019-03-26 20:53 ` Joe Lawrence
2019-03-28 20:17 ` Joe Lawrence
2019-04-01 19:35 ` Joe Lawrence
2019-04-03 12:48 ` Miroslav Benes
2019-04-03 19:10 ` Joe Lawrence
2019-04-04 9:14 ` Miroslav Benes
2019-04-04 10:59 ` Miroslav Benes
[not found] ` <20190301141313.15057-4-jmoreira@suse.de>
2019-03-18 19:20 ` [PATCH v2 3/8] livepatch: Add klp-convert tool Joe Lawrence
2019-03-20 19:36 ` Miroslav Benes
2019-03-26 20:13 ` Joao Moreira
[not found] ` <20190301141313.15057-7-jmoreira@suse.de>
2019-03-18 19:20 ` [PATCH v2 6/8] modpost: Add modinfo flag to livepatch modules Joe Lawrence
[not found] ` <20190301141313.15057-8-jmoreira@suse.de>
2019-03-18 19:21 ` Joe Lawrence [this message]
[not found] ` <20190301141313.15057-9-jmoreira@suse.de>
2019-03-18 19:21 ` [PATCH v2 8/8] documentation: Update on livepatch elf format Joe Lawrence
2019-03-20 19:58 ` Miroslav Benes
[not found] ` <20190301141313.15057-6-jmoreira@suse.de>
2019-03-18 19:20 ` [PATCH v2 5/8] modpost: Integrate klp-convert Joe Lawrence
2019-03-22 14:54 ` Joe Lawrence
2019-03-22 16:37 ` Joao Moreira
2019-03-22 18:29 ` Joe Lawrence
2019-04-04 11:31 ` Miroslav Benes
2019-04-04 13:55 ` Joao Moreira
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=20190318192113.GA23220@redhat.com \
--to=joe.lawrence@redhat.com \
--cc=jeyu@kernel.org \
--cc=jikos@suse.cz \
--cc=jmoreira@suse.de \
--cc=jpoimboe@redhat.com \
--cc=khlebnikov@yandex-team.ru \
--cc=linux-kbuild@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=live-patching@vger.kernel.org \
--cc=matz@suse.de \
--cc=mbenes@suse.cz \
--cc=michal.lkml@markovi.net \
--cc=nstange@suse.de \
--cc=pmladek@suse.cz \
--cc=yamada.masahiro@socionext.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;
as well as URLs for NNTP newsgroup(s).