From: Sam James <sam@gentoo.org>
To: Nick Clifton <nickc@redhat.com>
Cc: Binutils <binutils@sourceware.org>
Subject: Re: binutils as policy checker (was: RFC: Add a linker warning when creating segments with RWX permissions)
Date: Fri, 29 Apr 2022 07:29:51 +0100 [thread overview]
Message-ID: <786031C9-60D3-4D02-9853-362CE6937556@gentoo.org> (raw)
In-Reply-To: <79ba6ad0-7bb6-be2c-2672-6924862c29de@redhat.com>
[-- Attachment #1: Type: text/plain, Size: 1755 bytes --]
> On 28 Apr 2022, at 10:46, Nick Clifton via Binutils <binutils@sourceware.org> wrote:
>
> Hi Guys,
>
> OK, attached is v2 of my proposed patch. The main features of this
> new version are:
>
> * There are now configure options which can turn off the generation
> of linker warnings about the creation of executable segments and
> the creation of executable stacks. By default however not using
> these configure options will result in the creation of a linker
> with all of the warnings enabled.
>
> * There is new linker command line option: --no-warn-rwx-segments
> which disables the warnings about executable segments.
>
> * There are tests for the new features, plus extra regexps in the
> testsuite's pruning proc to remove the warnings from the linker's
> output for normal tests.
>
> * The creation of a TLS segment with eXecute permission will trigger
> a warning, regardless of whether it has the read and/or write
> permissions set.
>
> * There is a new configure time option which will disable the
> creation of an executable stack simply because an input file is
> missing a .note-GNU-stack section (for those architectures where
> such a creation is the normal behaviour). This option is not
> enabled by default however. At least not yet.
>
> I think that this represents the best compromise between helping to
> promote secure builds whilst also allowing toolchain creators and
> program builders the option to disable the features if they wish.
>
> Any comments ?
WFM and thanks for taking my comments into account -- much appreciated!
>
> Cheers
> Nick<ld-rwx-warn.patch>
best,
sam
[-- Attachment #2: Message signed with OpenPGP --]
[-- Type: application/pgp-signature, Size: 618 bytes --]
next prev parent reply other threads:[~2022-04-29 6:29 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-26 11:31 RFC: Add a linker warning when creating segments with RWX permissions Nick Clifton
2022-04-26 13:56 ` Jan Beulich
2022-04-26 16:39 ` Nick Clifton
2022-04-26 15:06 ` binutils as policy checker (was: RFC: Add a linker warning when creating segments with RWX permissions) Michael Matz
2022-04-26 15:20 ` Joel Sherrill
2022-04-28 9:46 ` Nick Clifton
2022-04-29 6:29 ` Sam James [this message]
2022-05-03 14:54 ` Michael Matz
2022-05-03 19:35 ` Matthias Klose
2022-05-03 19:57 ` H.J. Lu
2022-05-03 20:29 ` Matthias Klose
2022-04-26 16:47 ` Nick Clifton
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=786031C9-60D3-4D02-9853-362CE6937556@gentoo.org \
--to=sam@gentoo.org \
--cc=binutils@sourceware.org \
--cc=nickc@redhat.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 read-only IMAP folder(s) and NNTP newsgroup(s).