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Date: Thu, 07 Jan 2021 11:51:44 +0000 From: Alexander Lobakin <alobakin@...me> To: Thomas Bogendoerfer <tsbogend@...ha.franken.de> Cc: Arnd Bergmann <arnd@...db.de>, Nathan Chancellor <natechancellor@...il.com>, Nick Desaulniers <ndesaulniers@...gle.com>, Fangrui Song <maskray@...gle.com>, Huacai Chen <chenhuacai@...nel.org>, Pei Huang <huangpei@...ngson.cn>, Jiaxun Yang <jiaxun.yang@...goat.com>, Alexander Lobakin <alobakin@...me>, Sami Tolvanen <samitolvanen@...gle.com>, Ingo Molnar <mingo@...nel.org>, Ralf Baechle <ralf@...ux-mips.org>, Corey Minyard <cminyard@...sta.com>, linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org, stable@...r.kernel.org, clang-built-linux@...glegroups.com Subject: [PATCH v3 mips-next 0/7] MIPS: vmlinux.lds.S sections fixes & cleanup This series hunts the problems discovered after manual enabling of ARCH_WANT_LD_ORPHAN_WARN. Notably: - adds the missing PAGE_ALIGNED_DATA() section affecting VDSO placement (marked for stable); - properly stops .eh_frame section generation. Compile and runtime tested on MIPS32R2 CPS board with no issues using two different toolkits: - Binutils 2.35.1, GCC 10.2.0; - LLVM stack 11.0.0. Since v2 [1]: - stop discarding .eh_frame and just prevent it from generating (Kees); - drop redundant sections assertions (Fangrui); - place GOT table in .text instead of asserting as it's not empty when building with LLVM (Nathan); - catch compound literals in generic definitions when building with LD_DEAD_CODE_DATA_ELIMINATION (Kees); - collect two Reviewed-bys (Kees). Since v1 [0]: - catch .got entries too as LLD may produce it (Nathan); - check for unwanted sections to be zero-sized instead of discarding (Fangrui). [0] https://lore.kernel.org/linux-mips/20210104121729.46981-1-alobakin@pm.me [1] https://lore.kernel.org/linux-mips/20210106200713.31840-1-alobakin@pm.me Alexander Lobakin (7): MIPS: vmlinux.lds.S: add missing PAGE_ALIGNED_DATA() section MIPS: vmlinux.lds.S: add ".gnu.attributes" to DISCARDS MIPS: properly stop .eh_frame generation MIPS: vmlinux.lds.S: catch bad .rel.dyn at link time MIPS: vmlinux.lds.S: explicitly declare .got table vmlinux.lds.h: catch compound literals into data and BSS MIPS: select ARCH_WANT_LD_ORPHAN_WARN arch/mips/Kconfig | 1 + arch/mips/include/asm/asm.h | 18 ++++++++++++++++++ arch/mips/kernel/vmlinux.lds.S | 15 ++++++++++++++- include/asm-generic/vmlinux.lds.h | 6 +++--- 4 files changed, 36 insertions(+), 4 deletions(-) -- 2.30.0
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