From: Nathan Chancellor <nathan@kernel.org>
To: richard@nod.at, anton.ivanov@cambridgegreys.com,
johannes@sipsolutions.net, masahiroy@kernel.org
Cc: nathan@kernel.org, nicolas@fjasle.eu, ndesaulniers@google.com,
morbo@google.com, justinstitt@google.com,
linux-um@lists.infradead.org, linux-kbuild@vger.kernel.org,
llvm@lists.linux.dev, patches@lists.linux.dev,
stable@vger.kernel.org
Subject: [PATCH 0/2] Fix UML build with clang-18 and newer
Date: Tue, 23 Jan 2024 15:59:53 -0700 [thread overview]
Message-ID: <20240123-fix-uml-clang-18-v1-0-efc095519cf9@kernel.org> (raw)
Hi all,
This series resolves two independent but related issues that were
recently exposed by two LLVM changes.
https://github.com/llvm/llvm-project/commit/ec92d74a0ef89b9dd46aee6ec8aca6bfd3c66a54
exposes that '-no-pie' is not getting added to the linker flags with
clang, resulting in building objects with '-fno-PIE' that are linked
with '-pie', to which the linker rightfully errors with:
/usr/sbin/ld: init/main.o: relocation R_X86_64_32 against symbol `saved_command_line' can not be used when making a PIE object; recompile with -fPIE
/usr/sbin/ld: failed to set dynamic section sizes: bad value
https://github.com/llvm/llvm-project/commit/4bf8a688956a759b7b6b8d94f42d25c13c7af130
adds '.ltext' (and '.ltext.*' with '-ffunction-sections') when using
'-mcmodel=large' (which UML does), which causes a segmentation fault
with modpost.
I have tested these patches with all supported versions of clang,
noticing no regressions.
---
Nathan Chancellor (2):
um: Fix adding '-no-pie' for clang
modpost: Add '.ltext' and '.ltext.*' to TEXT_SECTIONS
arch/um/Makefile | 4 +++-
scripts/mod/modpost.c | 3 ++-
2 files changed, 5 insertions(+), 2 deletions(-)
---
base-commit: 0dd3ee31125508cd67f7e7172247f05b7fd1753a
change-id: 20240118-fix-uml-clang-18-e365b0503a29
Best regards,
--
Nathan Chancellor <nathan@kernel.org>
next reply other threads:[~2024-01-23 23:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-23 22:59 Nathan Chancellor [this message]
2024-01-23 22:59 ` [PATCH 1/2] um: Fix adding '-no-pie' for clang Nathan Chancellor
2024-01-27 15:46 ` Masahiro Yamada
2024-01-23 22:59 ` [PATCH 2/2] modpost: Add '.ltext' and '.ltext.*' to TEXT_SECTIONS Nathan Chancellor
2024-01-27 15:49 ` Masahiro Yamada
2024-01-27 15:43 ` [PATCH 0/2] Fix UML build with clang-18 and newer Masahiro Yamada
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=20240123-fix-uml-clang-18-v1-0-efc095519cf9@kernel.org \
--to=nathan@kernel.org \
--cc=anton.ivanov@cambridgegreys.com \
--cc=johannes@sipsolutions.net \
--cc=justinstitt@google.com \
--cc=linux-kbuild@vger.kernel.org \
--cc=linux-um@lists.infradead.org \
--cc=llvm@lists.linux.dev \
--cc=masahiroy@kernel.org \
--cc=morbo@google.com \
--cc=ndesaulniers@google.com \
--cc=nicolas@fjasle.eu \
--cc=patches@lists.linux.dev \
--cc=richard@nod.at \
--cc=stable@vger.kernel.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).