Messages in this thread | | | From | Arvind Sankar <> | Subject | [PATCH v2 0/2] Stop generating .eh_frame sections | Date | Mon, 24 Feb 2020 18:21:27 -0500 |
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In three places in the x86 kernel we are currently generating .eh_frame sections only to discard them later via linker script. This is in the boot code (setup.elf), the realmode trampoline (realmode.elf) and the compressed kernel.
Implement Fangrui and Nick's suggestion [1] to fix KBUILD_CFLAGS by adding -fno-asynchronous-unwind-tables to avoid generating .eh_frame sections in the first place, rather than discarding it in the linker script.
Changes from v1:
Rebase on top of tip:x86/boot and include reverting the addition of .eh_frame discard in compressed/vmlinux.lds.S. Fix up a comment that refers to .eh_frame, pointed out by Nick.
Arvind Sankar (2): arch/x86: Use -fno-asynchronous-unwind-tables to suppress .eh_frame sections arch/x86: Drop unneeded linker script discard of .eh_frame
arch/x86/boot/Makefile | 1 + arch/x86/boot/compressed/Makefile | 1 + arch/x86/boot/compressed/vmlinux.lds.S | 5 ----- arch/x86/boot/setup.ld | 1 - arch/x86/include/asm/dwarf2.h | 4 ++-- arch/x86/kernel/vmlinux.lds.S | 7 ++----- arch/x86/realmode/rm/Makefile | 1 + arch/x86/realmode/rm/realmode.lds.S | 1 - drivers/firmware/efi/libstub/Makefile | 3 ++- 9 files changed, 9 insertions(+), 15 deletions(-)
-- 2.24.1
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