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Gilmore , Palmer Dabbelt , Arnd Bergmann , Andrew Morton , Tom Saeger , stable@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, Christoph Hellwig , Yoshinori Sato Subject: [PATCH 5.15 v2 5/5] sh: define RUNTIME_DISCARD_EXIT Date: Fri, 10 Feb 2023 13:18:44 -0700 Message-Id: <20230210-tsaeger-upstream-linux-stable-5-15-v2-5-6c68622745e9@oracle.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230210-tsaeger-upstream-linux-stable-5-15-v2-0-6c68622745e9@oracle.com> References: <20230210-tsaeger-upstream-linux-stable-5-15-v2-0-6c68622745e9@oracle.com> X-Mailer: b4 0.12.1 X-ClientProxiedBy: SJ0PR13CA0012.namprd13.prod.outlook.com (2603:10b6:a03:2c0::17) To BY5PR10MB3794.namprd10.prod.outlook.com (2603:10b6:a03:1b2::30) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: 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linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org 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 --- arch/sh/kernel/vmlinux.lds.S | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/sh/kernel/vmlinux.lds.S b/arch/sh/kernel/vmlinux.lds.S index 3161b9ccd2a5..b6276a3521d7 100644 --- 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