From: Miroslav Benes <mbenes@suse.cz>
To: Jessica Yu <jeyu@kernel.org>
Cc: Torsten Duwe <duwe@lst.de>, Will Deacon <will.deacon@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Julien Thierry <julien.thierry@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
AKASHI Takahiro <takahiro.akashi@linaro.org>,
Petr Mladek <pmladek@suse.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, live-patching@vger.kernel.org
Subject: Re: [PATCH v2] arm64/module: use mod->klp_info section header information for livepatch modules
Date: Mon, 29 Oct 2018 14:24:16 +0100 (CET) [thread overview]
Message-ID: <alpine.LSU.2.21.1810291415340.22023@pobox.suse.cz> (raw)
In-Reply-To: <20181026172500.g65bl2p7cvey3qsx@linux-8ccs>
> diff --git a/arch/arm64/kernel/module.c b/arch/arm64/kernel/module.c
> index dd23655fda3a..490e56070a7e 100644
> --- a/arch/arm64/kernel/module.c
> +++ b/arch/arm64/kernel/module.c
> @@ -461,5 +461,15 @@ int module_finalize(const Elf_Ehdr *hdr,
> #endif
> }
>
> +#ifdef CONFIG_LIVEPATCH
> + /*
> + * For livepatching, switch to the saved section header info for .plt
> + * stored in mod->klp_info. This is needed so that livepatch is able to
> + * call apply_relocate_add() after patch module load.
> + */
> + if (is_livepatch_module(me))
> + me->arch.core.plt = me->klp_info->sechdrs + me->arch.core.plt_shndx;
> +#endif
I missed it before, but the hunk should be under "#ifdef
CONFIG_ARM64_MODULE_PLTS" protection similarly to ftrace_trampoline just
above. me->arch.core.plt may not exist otherwise.
Miroslav
next prev parent reply other threads:[~2018-10-29 13:24 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-01 14:09 [PATCH v3 0/4] arm64 live patching Torsten Duwe
2018-10-01 14:16 ` [PATCH v3 1/4] DYNAMIC_FTRACE configurable with and without REGS Torsten Duwe
2018-10-01 14:52 ` Ard Biesheuvel
2018-10-01 15:03 ` Torsten Duwe
2018-10-01 15:06 ` Ard Biesheuvel
2018-10-01 15:10 ` Torsten Duwe
2018-10-01 15:14 ` Steven Rostedt
2018-10-01 14:16 ` [PATCH v3 2/4] arm64: implement ftrace with regs Torsten Duwe
2018-10-01 15:57 ` Ard Biesheuvel
2018-10-02 10:02 ` Torsten Duwe
2018-10-02 10:39 ` Ard Biesheuvel
2018-10-02 11:27 ` Mark Rutland
2018-10-02 12:18 ` Torsten Duwe
2018-10-02 12:57 ` Mark Rutland
2018-10-01 14:16 ` [PATCH v3 3/4] arm64: implement live patching Torsten Duwe
2018-10-17 13:39 ` Miroslav Benes
2018-10-18 12:58 ` Jessica Yu
2018-10-19 11:59 ` Miroslav Benes
2018-10-19 12:18 ` Jessica Yu
2018-10-19 15:14 ` Miroslav Benes
2018-10-19 13:46 ` Torsten Duwe
2018-10-19 13:52 ` Ard Biesheuvel
2018-10-19 15:21 ` Miroslav Benes
2018-10-20 14:10 ` Ard Biesheuvel
2018-10-22 12:53 ` Miroslav Benes
2018-10-22 14:54 ` Torsten Duwe
2018-10-23 17:55 ` [PATCH] arm64/module: use mod->klp_info section header information Jessica Yu
2018-10-23 19:32 ` kbuild test robot
2018-10-24 11:57 ` Miroslav Benes
2018-10-25 8:08 ` Petr Mladek
2018-10-25 9:00 ` Miroslav Benes
2018-10-25 11:42 ` Jessica Yu
2018-10-26 17:25 ` [PATCH v2] arm64/module: use mod->klp_info section header information for livepatch modules Jessica Yu
2018-10-29 13:24 ` Miroslav Benes [this message]
2018-10-29 13:32 ` Jessica Yu
2018-10-29 15:28 ` Will Deacon
2018-10-30 13:19 ` Jessica Yu
2018-11-01 15:18 ` Miroslav Benes
2018-11-01 16:07 ` Will Deacon
2018-11-05 12:30 ` Ard Biesheuvel
2018-11-05 17:57 ` [PATCH] arm64/module: use plt section indices for relocations Jessica Yu
2018-11-05 18:04 ` Ard Biesheuvel
2018-11-05 18:53 ` [PATCH v2] " Jessica Yu
2018-11-05 18:56 ` Ard Biesheuvel
2018-11-05 19:26 ` Will Deacon
2018-11-05 19:49 ` Jessica Yu
2018-11-06 9:44 ` Miroslav Benes
2018-10-01 14:16 ` [PATCH v3 4/4] arm64: reliable stacktraces Torsten Duwe
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=alpine.LSU.2.21.1810291415340.22023@pobox.suse.cz \
--to=mbenes@suse.cz \
--cc=ard.biesheuvel@linaro.org \
--cc=arnd@arndb.de \
--cc=catalin.marinas@arm.com \
--cc=duwe@lst.de \
--cc=jeyu@kernel.org \
--cc=jpoimboe@redhat.com \
--cc=julien.thierry@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=live-patching@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=pmladek@suse.com \
--cc=rostedt@goodmis.org \
--cc=takahiro.akashi@linaro.org \
--cc=will.deacon@arm.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).