From: Will Deacon <will@kernel.org>
To: Kees Cook <keescook@chromium.org>
Cc: Borislav Petkov <bp@suse.de>, "H.J. Lu" <hjl.tools@gmail.com>,
Russell King <linux@armlinux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Peter Collingbourne <pcc@google.com>,
James Morse <james.morse@arm.com>, Arnd Bergmann <arnd@arndb.de>,
Masahiro Yamada <masahiroy@kernel.org>,
x86@kernel.org, linux-arm-kernel@lists.infradead.org,
linux-arch@vger.kernel.org, linux-kbuild@vger.kernel.org,
clang-built-linux@googlegroups.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 6/9] arm64/build: Use common DISCARDS in linker script
Date: Tue, 17 Mar 2020 21:52:57 +0000 [thread overview]
Message-ID: <20200317215256.GA20788@willie-the-truck> (raw)
In-Reply-To: <20200228002244.15240-7-keescook@chromium.org>
On Thu, Feb 27, 2020 at 04:22:41PM -0800, Kees Cook wrote:
> Use the common DISCARDS rule for the linker script in an effort to
> regularize the linker script to prepare for warning on orphaned
> sections.
>
> Signed-off-by: Kees Cook <keescook@chromium.org>
> ---
> arch/arm64/kernel/vmlinux.lds.S | 8 ++------
> 1 file changed, 2 insertions(+), 6 deletions(-)
>
> diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
> index 497f9675071d..c61d9ab3211c 100644
> --- a/arch/arm64/kernel/vmlinux.lds.S
> +++ b/arch/arm64/kernel/vmlinux.lds.S
> @@ -6,6 +6,7 @@
> */
>
> #define RO_EXCEPTION_TABLE_ALIGN 8
> +#define RUNTIME_DISCARD_EXIT
>
> #include <asm-generic/vmlinux.lds.h>
> #include <asm/cache.h>
> @@ -19,7 +20,6 @@
>
> /* .exit.text needed in case of alternative patching */
> #define ARM_EXIT_KEEP(x) x
> -#define ARM_EXIT_DISCARD(x)
>
> OUTPUT_ARCH(aarch64)
> ENTRY(_text)
> @@ -94,12 +94,8 @@ SECTIONS
> * matching the same input section name. There is no documented
> * order of matching.
> */
> + DISCARDS
> /DISCARD/ : {
> - ARM_EXIT_DISCARD(EXIT_TEXT)
> - ARM_EXIT_DISCARD(EXIT_DATA)
> - EXIT_CALL
> - *(.discard)
> - *(.discard.*)
> *(.interp .dynamic)
> *(.dynsym .dynstr .hash .gnu.hash)
> *(.eh_frame)
Acked-by: Will Deacon <will@kernel.org>
Will
next prev parent reply other threads:[~2020-03-17 21:53 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-28 0:22 [PATCH 0/9] Enable orphan section warning Kees Cook
2020-02-28 0:22 ` [PATCH 1/9] scripts/link-vmlinux.sh: Delay orphan handling warnings until final link Kees Cook
2020-03-20 2:47 ` Nicholas Piggin
2020-03-20 18:24 ` Kees Cook
2020-03-22 9:16 ` Nicholas Piggin
2020-03-22 16:00 ` Kees Cook
2020-02-28 0:22 ` [PATCH 2/9] vmlinux.lds.h: Add .gnu.version* to DISCARDS Kees Cook
2020-02-28 0:22 ` [PATCH 3/9] x86/build: Warn on orphan section placement Kees Cook
2020-02-28 0:22 ` [PATCH 4/9] x86/boot: " Kees Cook
2020-02-28 0:22 ` [PATCH 5/9] Add RUNTIME_DISCARD_EXIT to generic DISCARDS Kees Cook
2020-02-28 0:22 ` [PATCH 6/9] arm64/build: Use common DISCARDS in linker script Kees Cook
2020-03-17 21:52 ` Will Deacon [this message]
2020-02-28 0:22 ` [PATCH 7/9] arm64/build: Warn on orphan section placement Kees Cook
2020-03-17 21:56 ` Will Deacon
2020-03-17 23:01 ` Kees Cook
2020-03-17 23:10 ` Nick Desaulniers
2020-02-28 0:22 ` [PATCH 8/9] arm/build: " Kees Cook
2020-02-28 0:22 ` [PATCH 9/9] arm/boot: " Kees Cook
2020-02-28 6:51 ` [PATCH 0/9] Enable orphan section warning Sedat Dilek
2020-03-03 4:32 ` Kees Cook
2020-04-02 16:20 ` Sedat Dilek
2020-04-02 17:26 ` Kees Cook
2020-04-05 11:15 ` Sedat Dilek
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