From: Kees Cook <keescook@chromium.org> To: Will Deacon <will@kernel.org> Cc: Kees Cook <keescook@chromium.org>, Ard Biesheuvel <ardb@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Mark Rutland <mark.rutland@arm.com>, Peter Collingbourne <pcc@google.com>, James Morse <james.morse@arm.com>, Borislav Petkov <bp@suse.de>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Russell King <linux@armlinux.org.uk>, Masahiro Yamada <masahiroy@kernel.org>, Arvind Sankar <nivedita@alum.mit.edu>, Nick Desaulniers <ndesaulniers@google.com>, Nathan Chancellor <natechancellor@gmail.com>, Arnd Bergmann <arnd@arndb.de>, x86@kernel.org, clang-built-linux@googlegroups.com, linux-arch@vger.kernel.org, linux-efi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 09/17] arm64/build: Remove .eh_frame* sections due to unwind tables Date: Sun, 28 Jun 2020 23:18:32 -0700 Message-ID: <20200629061840.4065483-10-keescook@chromium.org> (raw) In-Reply-To: <20200629061840.4065483-1-keescook@chromium.org> Avoid .eh_frame* section generation by making sure both CFLAGS and AFLAGS contain -fno-asychronous-unwind-tables and -fno-unwind-tables. Suggested-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> --- arch/arm64/Makefile | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index a0d94d063fa8..895486606f74 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -47,13 +47,16 @@ endif KBUILD_CFLAGS += -mgeneral-regs-only \ $(compat_vdso) $(cc_has_k_constraint) -KBUILD_CFLAGS += -fno-asynchronous-unwind-tables KBUILD_CFLAGS += $(call cc-disable-warning, psabi) KBUILD_AFLAGS += $(compat_vdso) KBUILD_CFLAGS += $(call cc-option,-mabi=lp64) KBUILD_AFLAGS += $(call cc-option,-mabi=lp64) +# Avoid generating .eh_frame* sections. +KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables +KBUILD_AFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables + ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) prepare: stack_protector_prepare stack_protector_prepare: prepare0 -- 2.25.1
next prev parent reply index Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-06-29 6:18 [PATCH v4 00/17] Warn on orphan section placement Kees Cook 2020-06-29 6:18 ` [PATCH v4 01/17] vmlinux.lds.h: Add .gnu.version* to DISCARDS Kees Cook 2020-06-29 6:18 ` [PATCH v4 02/17] vmlinux.lds.h: Avoid KASAN and KCSAN's unwanted sections Kees Cook 2020-06-29 6:18 ` [PATCH v4 03/17] vmlinux.lds.h: Split ELF_DETAILS from STABS_DEBUG Kees Cook 2020-06-29 6:18 ` [PATCH v4 04/17] vmlinux.lds.h: Add .symtab, .strtab, and .shstrtab to ELF_DETAILS Kees Cook 2020-06-29 6:18 ` [PATCH v4 05/17] ctype: Work around Clang -mbranch-protection=none bug Kees Cook 2020-06-29 8:15 ` Ard Biesheuvel 2020-06-29 14:43 ` Kees Cook 2020-06-29 15:06 ` Kees Cook 2020-06-29 15:08 ` Ard Biesheuvel 2020-06-29 15:16 ` Kees Cook 2020-06-29 18:02 ` Nick Desaulniers 2020-06-29 18:37 ` Kees Cook 2020-06-29 6:18 ` [PATCH v4 06/17] efi/libstub: Disable -mbranch-protection Kees Cook 2020-06-29 6:18 ` [PATCH v4 07/17] arm64/build: Use common DISCARDS in linker script Kees Cook 2020-06-29 6:18 ` [PATCH v4 08/17] arm64/mm: Remove needless section quotes Kees Cook 2020-06-29 19:53 ` Nick Desaulniers 2020-06-29 20:03 ` Joe Perches 2020-06-29 20:29 ` Nick Desaulniers 2020-06-29 20:04 ` Kees Cook 2020-06-29 20:54 ` Arvind Sankar 2020-06-29 21:06 ` Arvind Sankar 2020-06-29 6:18 ` Kees Cook [this message] 2020-06-29 6:18 ` [PATCH v4 10/17] arm64/kernel: Remove needless Call Frame Information annotations Kees Cook 2020-06-29 6:18 ` [PATCH v4 11/17] arm64/build: Warn on orphan section placement Kees Cook 2020-06-29 6:18 ` [PATCH v4 12/17] arm/build: Refactor linker script headers Kees Cook 2020-06-29 6:18 ` [PATCH v4 13/17] arm/build: Explicitly keep .ARM.attributes sections Kees Cook 2020-06-29 6:18 ` [PATCH v4 14/17] arm/build: Warn on orphan section placement Kees Cook 2020-06-29 15:54 ` Arvind Sankar 2020-06-29 18:07 ` Russell King - ARM Linux admin 2020-06-29 18:15 ` Arvind Sankar 2020-06-29 19:03 ` Russell King - ARM Linux admin 2020-06-29 19:47 ` Nick Desaulniers 2020-06-29 6:18 ` [PATCH v4 15/17] arm/boot: " Kees Cook 2020-06-29 6:18 ` [PATCH v4 16/17] x86/build: " Kees Cook 2020-06-29 6:18 ` [PATCH v4 17/17] x86/boot: " Kees Cook 2020-08-21 16:02 ` [PATCH v4 00/17] " Will Deacon 2020-08-21 17:36 ` Kees Cook
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20200629061840.4065483-10-keescook@chromium.org \ --to=keescook@chromium.org \ --cc=ardb@kernel.org \ --cc=arnd@arndb.de \ --cc=bp@suse.de \ --cc=catalin.marinas@arm.com \ --cc=clang-built-linux@googlegroups.com \ --cc=james.morse@arm.com \ --cc=linux-arch@vger.kernel.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-efi@vger.kernel.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux@armlinux.org.uk \ --cc=mark.rutland@arm.com \ --cc=masahiroy@kernel.org \ --cc=mingo@redhat.com \ --cc=natechancellor@gmail.com \ --cc=ndesaulniers@google.com \ --cc=nivedita@alum.mit.edu \ --cc=pcc@google.com \ --cc=tglx@linutronix.de \ --cc=will@kernel.org \ --cc=x86@kernel.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: link
Linux-EFI Archive on lore.kernel.org Archives are clonable: git clone --mirror https://lore.kernel.org/linux-efi/0 linux-efi/git/0.git # If you have public-inbox 1.1+ installed, you may # initialize and index your mirror using the following commands: public-inbox-init -V2 linux-efi linux-efi/ https://lore.kernel.org/linux-efi \ linux-efi@vger.kernel.org public-inbox-index linux-efi Example config snippet for mirrors Newsgroup available over NNTP: nntp://nntp.lore.kernel.org/org.kernel.vger.linux-efi AGPL code for this site: git clone https://public-inbox.org/public-inbox.git