* [PATCH] ARM: vdso: remove -nostdlib compiler flag
@ 2022-01-20 5:44 Masahiro Yamada
2022-01-24 19:57 ` Nick Desaulniers
0 siblings, 1 reply; 4+ messages in thread
From: Masahiro Yamada @ 2022-01-20 5:44 UTC (permalink / raw)
To: patches
Cc: Masahiro Yamada, Nick Desaulniers, Russell King, linux-arm-kernel,
linux-kernel
The -nostdlib option requests the compiler to not use the standard
system startup files or libraries when linking. It is effective only
when $(CC) is used as a linker driver.
Since commit fe00e50b2db8 ("ARM: 8858/1: vdso: use $(LD) instead of
$(CC) to link VDSO"), $(LD) is directly used, hence -nostdlib is
unneeded.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
---
KernelVersion: 5.16
arch/arm/vdso/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/vdso/Makefile b/arch/arm/vdso/Makefile
index 7c9e395b77f7..ec52b776f926 100644
--- a/arch/arm/vdso/Makefile
+++ b/arch/arm/vdso/Makefile
@@ -18,7 +18,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO32
ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8
ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
- -z max-page-size=4096 -nostdlib -shared $(ldflags-y) \
+ -z max-page-size=4096 -shared $(ldflags-y) \
--hash-style=sysv --build-id=sha1 \
-T
--
2.32.0
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^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] ARM: vdso: remove -nostdlib compiler flag
2022-01-20 5:44 [PATCH] ARM: vdso: remove -nostdlib compiler flag Masahiro Yamada
@ 2022-01-24 19:57 ` Nick Desaulniers
0 siblings, 0 replies; 4+ messages in thread
From: Nick Desaulniers @ 2022-01-24 19:57 UTC (permalink / raw)
Cc: patches, Masahiro Yamada, Russell King, linux-arm-kernel,
linux-kernel
FWIW, it looks like this has been submitted to RMK's queue:
https://www.armlinux.org.uk/developer/patches/viewpatch.php?id=9181/1
On Wed, Jan 19, 2022 at 9:44 PM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
> The -nostdlib option requests the compiler to not use the standard
> system startup files or libraries when linking. It is effective only
> when $(CC) is used as a linker driver.
>
> Since commit fe00e50b2db8 ("ARM: 8858/1: vdso: use $(LD) instead of
> $(CC) to link VDSO"), $(LD) is directly used, hence -nostdlib is
> unneeded.
>
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
> ---
>
> KernelVersion: 5.16
>
> arch/arm/vdso/Makefile | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/vdso/Makefile b/arch/arm/vdso/Makefile
> index 7c9e395b77f7..ec52b776f926 100644
> --- a/arch/arm/vdso/Makefile
> +++ b/arch/arm/vdso/Makefile
> @@ -18,7 +18,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO32
>
> ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8
> ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
> - -z max-page-size=4096 -nostdlib -shared $(ldflags-y) \
> + -z max-page-size=4096 -shared $(ldflags-y) \
> --hash-style=sysv --build-id=sha1 \
> -T
>
> --
> 2.32.0
>
--
Thanks,
~Nick Desaulniers
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] ARM: vdso: remove -nostdlib compiler flag
@ 2021-11-07 16:18 Masahiro Yamada
2021-11-10 20:06 ` Nick Desaulniers
0 siblings, 1 reply; 4+ messages in thread
From: Masahiro Yamada @ 2021-11-07 16:18 UTC (permalink / raw)
To: linux-arm-kernel, Russell King
Cc: clang-built-linux, Masahiro Yamada, Russell King, linux-kernel
The -nostdlib option requests the compiler to not use the standard
system startup files or libraries when linking. It is effective only
when $(CC) is used as a linker driver.
Since commit fe00e50b2db8 ("ARM: 8858/1: vdso: use $(LD) instead of
$(CC) to link VDSO"), $(LD) is directly used, hence -nostdlib is
unneeded.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
arch/arm/vdso/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/vdso/Makefile b/arch/arm/vdso/Makefile
index 7c9e395b77f7..ec52b776f926 100644
--- a/arch/arm/vdso/Makefile
+++ b/arch/arm/vdso/Makefile
@@ -18,7 +18,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO32
ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8
ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
- -z max-page-size=4096 -nostdlib -shared $(ldflags-y) \
+ -z max-page-size=4096 -shared $(ldflags-y) \
--hash-style=sysv --build-id=sha1 \
-T
--
2.30.2
_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] ARM: vdso: remove -nostdlib compiler flag
2021-11-07 16:18 Masahiro Yamada
@ 2021-11-10 20:06 ` Nick Desaulniers
0 siblings, 0 replies; 4+ messages in thread
From: Nick Desaulniers @ 2021-11-10 20:06 UTC (permalink / raw)
To: Masahiro Yamada
Cc: linux-arm-kernel, Russell King, clang-built-linux, Russell King,
linux-kernel
On Sun, Nov 7, 2021 at 8:19 AM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
> The -nostdlib option requests the compiler to not use the standard
> system startup files or libraries when linking. It is effective only
> when $(CC) is used as a linker driver.
>
> Since commit fe00e50b2db8 ("ARM: 8858/1: vdso: use $(LD) instead of
> $(CC) to link VDSO"), $(LD) is directly used, hence -nostdlib is
> unneeded.
Thanks for the patch!
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
>
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> ---
>
> arch/arm/vdso/Makefile | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/vdso/Makefile b/arch/arm/vdso/Makefile
> index 7c9e395b77f7..ec52b776f926 100644
> --- a/arch/arm/vdso/Makefile
> +++ b/arch/arm/vdso/Makefile
> @@ -18,7 +18,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO32
>
> ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8
> ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
> - -z max-page-size=4096 -nostdlib -shared $(ldflags-y) \
> + -z max-page-size=4096 -shared $(ldflags-y) \
> --hash-style=sysv --build-id=sha1 \
> -T
>
> --
> 2.30.2
>
> --
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--
Thanks,
~Nick Desaulniers
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 4+ messages in thread
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