From: Pedro Alves <pedro@palves.net>
To: binutils@sourceware.org
Subject: Re: [PATCH] Support SHF_GNU_RETAIN ELF section flag
Date: Mon, 28 Sep 2020 12:35:28 +0100 [thread overview]
Message-ID: <a6cd1d9b-fa36-be55-8fae-76d6eafc7b2c@palves.net> (raw)
In-Reply-To: <20200922202933.kgflmtnwzkdrmrvs@jozef-acer-manjaro>
On 9/22/20 9:29 PM, Jozef Lawrynowicz wrote:
>
> The overall intention for this new flag is to enable a new "retain"
> attribute to be applied to declarations of functions and data in the
> source code. This attribute can be used to ensure the definition
> associated with the declaration is present in the linked output file,
> even if linker garbage collection would normally remove the containing
> section because it is unused.
On a high level, this sounds pretty much like __attribute__((used)).
Couldn't the new section flag be wired to that attribute?
I mean, isn't it a bug if linker garbage collection eliminates a
function marked with __attribute__((used)) ?
"used
This attribute, attached to a function, means that code must be emitted
for the function even if it appears that the function is not referenced."
I was surprised to not see any mention of the "used" attribute in the
proposal, neither here, nor in gABI mailing list discussion linked.
But maybe I missed it.
Pedro Alves
next prev parent reply other threads:[~2020-09-28 11:35 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 20:29 Jozef Lawrynowicz
2020-09-22 23:24 ` Hans-Peter Nilsson
2020-09-22 23:58 ` H.J. Lu
2020-09-23 1:09 ` Fangrui Song
2020-09-23 9:58 ` Jozef Lawrynowicz
2020-09-23 13:39 ` H.J. Lu
2020-09-23 13:51 ` Michael Matz
2020-09-23 16:52 ` Jozef Lawrynowicz
2020-09-23 17:13 ` H.J. Lu
2020-09-23 18:47 ` Jozef Lawrynowicz
2020-09-23 19:03 ` H.J. Lu
2020-09-23 20:04 ` Jozef Lawrynowicz
2020-09-23 20:17 ` H.J. Lu
2020-09-23 23:29 ` Fangrui Song
2020-09-24 11:39 ` Jozef Lawrynowicz
2020-09-24 19:06 ` Fangrui Song
2020-09-24 13:27 ` Michael Matz
2020-09-24 13:18 ` H.J. Lu
2020-09-24 13:49 ` Jozef Lawrynowicz
2020-09-24 13:59 ` H.J. Lu
2020-09-24 16:56 ` Jozef Lawrynowicz
2020-09-24 17:04 ` H.J. Lu
2020-09-24 17:18 ` Jozef Lawrynowicz
2020-09-24 17:37 ` H.J. Lu
2020-09-23 12:13 ` Jozef Lawrynowicz
2020-09-23 13:59 ` Alan Modra
2020-09-23 16:54 ` Jozef Lawrynowicz
2020-09-28 11:35 ` Pedro Alves [this message]
2020-09-28 12:28 ` Jozef Lawrynowicz
2020-09-28 14:46 ` Pedro Alves
2020-09-29 13:18 ` Michael Matz
2020-09-29 13:22 ` Jozef Lawrynowicz
2020-09-29 13:48 ` Pedro Alves
2020-09-29 13:55 ` Michael Matz
2020-09-29 14:04 ` Pedro Alves
2020-09-29 14:10 ` Michael Matz
2020-09-29 14:11 ` Pedro Alves
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=a6cd1d9b-fa36-be55-8fae-76d6eafc7b2c@palves.net \
--to=pedro@palves.net \
--cc=binutils@sourceware.org \
/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).