From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1FEB62584 for ; Thu, 23 Feb 2023 13:10:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6FE07C433EF; Thu, 23 Feb 2023 13:10:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1677157816; bh=17j1IuYxoghYGpS1B5DGIQJubZwkdi+SKKGet2h/y5k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GcTgT/aNb6B7MCeLX94pRG7UV1fzK5B1eJFg9T0WIysxYKTZx1lC8d5YThs+F45/B 8f36N421CJwpN3c5HQ4KQY9W+Nvi1Ml3fLX5P5rFwIYpRHvy0avAG8h3DxF7VF+gGj ahPGLw0/TI2F0tI9ybalZwkSqVBeDML4LjZSVTWE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tom Saeger , John Paul Adrian Glaubitz , Ard Biesheuvel , Arnd Bergmann , Christoph Hellwig , Dennis Gilmore , Masahiro Yamada , Naresh Kamboju , Nathan Chancellor , Palmer Dabbelt , Rich Felker , Yoshinori Sato , Andrew Morton Subject: [PATCH 6.1 40/46] sh: define RUNTIME_DISCARD_EXIT Date: Thu, 23 Feb 2023 14:06:47 +0100 Message-Id: <20230223130433.462949698@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230223130431.553657459@linuxfoundation.org> References: <20230223130431.553657459@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Tom Saeger commit c1c551bebf928889e7a8fef7415b44f9a64975f4 upstream. sh vmlinux fails to link with GNU ld < 2.40 (likely < 2.36) since commit 99cb0d917ffa ("arch: fix broken BuildID for arm64 and riscv"). This is similar to fixes for powerpc and s390: commit 4b9880dbf3bd ("powerpc/vmlinux.lds: Define RUNTIME_DISCARD_EXIT"). commit a494398bde27 ("s390: define RUNTIME_DISCARD_EXIT to fix link error with GNU ld < 2.36"). $ sh4-linux-gnu-ld --version | head -n1 GNU ld (GNU Binutils for Debian) 2.35.2 $ make ARCH=sh CROSS_COMPILE=sh4-linux-gnu- microdev_defconfig $ make ARCH=sh CROSS_COMPILE=sh4-linux-gnu- `.exit.text' referenced in section `__bug_table' of crypto/algboss.o: defined in discarded section `.exit.text' of crypto/algboss.o `.exit.text' referenced in section `__bug_table' of drivers/char/hw_random/core.o: defined in discarded section `.exit.text' of drivers/char/hw_random/core.o make[2]: *** [scripts/Makefile.vmlinux:34: vmlinux] Error 1 make[1]: *** [Makefile:1252: vmlinux] Error 2 arch/sh/kernel/vmlinux.lds.S keeps EXIT_TEXT: /* * .exit.text is discarded at runtime, not link time, to deal with * references from __bug_table */ .exit.text : AT(ADDR(.exit.text)) { EXIT_TEXT } However, EXIT_TEXT is thrown away by DISCARD(include/asm-generic/vmlinux.lds.h) because sh does not define RUNTIME_DISCARD_EXIT. GNU ld 2.40 does not have this issue and builds fine. This corresponds with Masahiro's comments in a494398bde27: "Nathan [Chancellor] also found that binutils commit 21401fc7bf67 ("Duplicate output sections in scripts") cured this issue, so we cannot reproduce it with binutils 2.36+, but it is better to not rely on it." Link: https://lkml.kernel.org/r/9166a8abdc0f979e50377e61780a4bba1dfa2f52.1674518464.git.tom.saeger@oracle.com Fixes: 99cb0d917ffa ("arch: fix broken BuildID for arm64 and riscv") Link: https://lore.kernel.org/all/Y7Jal56f6UBh1abE@dev-arch.thelio-3990X/ Link: https://lore.kernel.org/all/20230123194218.47ssfzhrpnv3xfez@oracle.com/ Signed-off-by: Tom Saeger Tested-by: John Paul Adrian Glaubitz Cc: Ard Biesheuvel Cc: Arnd Bergmann Cc: Christoph Hellwig Cc: Dennis Gilmore Cc: Greg Kroah-Hartman Cc: Masahiro Yamada Cc: Naresh Kamboju Cc: Nathan Chancellor Cc: Palmer Dabbelt Cc: Rich Felker Cc: Yoshinori Sato Signed-off-by: Andrew Morton Signed-off-by: Tom Saeger Signed-off-by: Greg Kroah-Hartman --- arch/sh/kernel/vmlinux.lds.S | 1 + 1 file changed, 1 insertion(+) --- a/arch/sh/kernel/vmlinux.lds.S +++ b/arch/sh/kernel/vmlinux.lds.S @@ -4,6 +4,7 @@ * Written by Niibe Yutaka and Paul Mundt */ OUTPUT_ARCH(sh) +#define RUNTIME_DISCARD_EXIT #include #include #include