From 4e5a36ab6607a0d3bde314babdfd1fc9f11feb2f Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Thu, 6 Feb 2025 10:21:38 -0700 Subject: [PATCH] arm64: Handle .ARM.attributes section in linker scripts commit ca0f4fe7cf7183bfbdc67ca2de56ae1fc3a8db2b upstream. A recent LLVM commit [1] started generating an .ARM.attributes section similar to the one that exists for 32-bit, which results in orphan section warnings (or errors if CONFIG_WERROR is enabled) from the linker because it is not handled in the arm64 linker scripts. ld.lld: error: arch/arm64/kernel/vdso/vgettimeofday.o:(.ARM.attributes) is being placed in '.ARM.attributes' ld.lld: error: arch/arm64/kernel/vdso/vgetrandom.o:(.ARM.attributes) is being placed in '.ARM.attributes' ld.lld: error: vmlinux.a(lib/vsprintf.o):(.ARM.attributes) is being placed in '.ARM.attributes' ld.lld: error: vmlinux.a(lib/win_minmax.o):(.ARM.attributes) is being placed in '.ARM.attributes' ld.lld: error: vmlinux.a(lib/xarray.o):(.ARM.attributes) is being placed in '.ARM.attributes' Discard the new sections in the necessary linker scripts to resolve the warnings, as the kernel and vDSO do not need to retain it, similar to the .note.gnu.property section. Cc: stable@vger.kernel.org Fixes: b3e5d80d0c48 ("arm64/build: Warn on orphan section placement") Link: https://github.com/llvm/llvm-project/commit/ee99c4d4845db66c4daa2373352133f4b237c942 [1] Signed-off-by: Nathan Chancellor Link: https://lore.kernel.org/r/20250206-arm64-handle-arm-attributes-in-linker-script-v3-1-d53d169913eb@kernel.org Signed-off-by: Will Deacon Signed-off-by: Greg Kroah-Hartman --- arch/arm64/kernel/vdso/vdso.lds.S | 1 + arch/arm64/kernel/vmlinux.lds.S | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/arm64/kernel/vdso/vdso.lds.S b/arch/arm64/kernel/vdso/vdso.lds.S index 6028f1fe2d1cb..cc8b36acb996f 100644 --- a/arch/arm64/kernel/vdso/vdso.lds.S +++ b/arch/arm64/kernel/vdso/vdso.lds.S @@ -38,6 +38,7 @@ SECTIONS */ /DISCARD/ : { *(.note.GNU-stack .note.gnu.property) + *(.ARM.attributes) } .note : { *(.note.*) } :text :note diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S index b0226eac7bda8..a2fb4241f5fbe 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -149,6 +149,7 @@ SECTIONS /DISCARD/ : { *(.interp .dynamic) *(.dynsym .dynstr .hash .gnu.hash) + *(.ARM.attributes) } . = KIMAGE_VADDR; -- 2.47.3