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From: Stefan Agner <stefan@agner.ch>
To: linux@armlinux.org.uk, ard.biesheuvel@linaro.org, arnd@arndb.de
Cc: robin.murphy@arm.com, nicolas.pitre@linaro.org,
	marc.zyngier@arm.com, behanw@converseincode.com,
	keescook@chromium.org, Bernhard.Rosenkranzer@linaro.org,
	mka@chromium.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, Stefan Agner <stefan@agner.ch>
Subject: [PATCH v2 2/6] efi/libstub/arm: add support for building with clang
Date: Sun, 25 Mar 2018 20:09:55 +0200	[thread overview]
Message-ID: <20180325180959.28008-3-stefan@agner.ch> (raw)
In-Reply-To: <20180325180959.28008-1-stefan@agner.ch>

Use cc-options call for -mno-single-pic-base since the option is
not available in clang. LLVM/clang always assumes a fixed
displacement between text/data and hence uses PC relative
addressing.

Signed-off-by: Stefan Agner <stefan@agner.ch>
---
 drivers/firmware/efi/libstub/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
index 7b3ba40f0745..2bf69cca0d87 100644
--- a/drivers/firmware/efi/libstub/Makefile
+++ b/drivers/firmware/efi/libstub/Makefile
@@ -13,7 +13,8 @@ cflags-$(CONFIG_X86)		+= -m$(BITS) -D__KERNEL__ -O2 \
 
 cflags-$(CONFIG_ARM64)		:= $(subst -pg,,$(KBUILD_CFLAGS)) -fpie
 cflags-$(CONFIG_ARM)		:= $(subst -pg,,$(KBUILD_CFLAGS)) \
-				   -fno-builtin -fpic -mno-single-pic-base
+				   -fno-builtin -fpic \
+				   $(call cc-option,-mno-single-pic-base,)
 
 cflags-$(CONFIG_EFI_ARMSTUB)	+= -I$(srctree)/scripts/dtc/libfdt
 
-- 
2.16.2

WARNING: multiple messages have this Message-ID (diff)
From: stefan@agner.ch (Stefan Agner)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 2/6] efi/libstub/arm: add support for building with clang
Date: Sun, 25 Mar 2018 20:09:55 +0200	[thread overview]
Message-ID: <20180325180959.28008-3-stefan@agner.ch> (raw)
In-Reply-To: <20180325180959.28008-1-stefan@agner.ch>

Use cc-options call for -mno-single-pic-base since the option is
not available in clang. LLVM/clang always assumes a fixed
displacement between text/data and hence uses PC relative
addressing.

Signed-off-by: Stefan Agner <stefan@agner.ch>
---
 drivers/firmware/efi/libstub/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
index 7b3ba40f0745..2bf69cca0d87 100644
--- a/drivers/firmware/efi/libstub/Makefile
+++ b/drivers/firmware/efi/libstub/Makefile
@@ -13,7 +13,8 @@ cflags-$(CONFIG_X86)		+= -m$(BITS) -D__KERNEL__ -O2 \
 
 cflags-$(CONFIG_ARM64)		:= $(subst -pg,,$(KBUILD_CFLAGS)) -fpie
 cflags-$(CONFIG_ARM)		:= $(subst -pg,,$(KBUILD_CFLAGS)) \
-				   -fno-builtin -fpic -mno-single-pic-base
+				   -fno-builtin -fpic \
+				   $(call cc-option,-mno-single-pic-base,)
 
 cflags-$(CONFIG_EFI_ARMSTUB)	+= -I$(srctree)/scripts/dtc/libfdt
 
-- 
2.16.2

  parent reply	other threads:[~2018-03-25 18:11 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-25 18:09 [PATCH v2 0/6] ARM: clang support Stefan Agner
2018-03-25 18:09 ` Stefan Agner
2018-03-25 18:09 ` [PATCH v2 1/6] bus: arm-cci: use asm unreachable Stefan Agner
2018-03-25 18:09   ` Stefan Agner
2018-03-25 18:14   ` Nicolas Pitre
2018-03-25 18:14     ` Nicolas Pitre
2018-03-25 18:19     ` Stefan Agner
2018-03-25 18:19       ` Stefan Agner
2018-04-16 15:59   ` Stefan Agner
2018-04-16 15:59     ` Stefan Agner
2018-03-25 18:09 ` Stefan Agner [this message]
2018-03-25 18:09   ` [PATCH v2 2/6] efi/libstub/arm: add support for building with clang Stefan Agner
2018-03-25 18:09 ` [PATCH v2 3/6] ARM: trusted_foundations: do not use naked function Stefan Agner
2018-03-25 18:09   ` Stefan Agner
2018-03-26 21:20   ` Dmitry Osipenko
2018-03-26 21:20     ` Dmitry Osipenko
2018-03-27 11:54     ` Robin Murphy
2018-03-27 11:54       ` Robin Murphy
2018-03-27 12:16       ` Dmitry Osipenko
2018-03-27 12:16         ` Dmitry Osipenko
2018-04-16 15:56         ` Stefan Agner
2018-04-16 15:56           ` Stefan Agner
2018-04-16 16:08           ` Stephen Warren
2018-04-16 16:08             ` Stephen Warren
2018-04-16 18:21             ` Stefan Agner
2018-04-16 18:21               ` Stefan Agner
2018-04-17  8:11               ` Thierry Reding
2018-04-17  8:11                 ` Thierry Reding
2018-06-26  8:11                 ` Stefan Agner
2018-06-26  8:11                   ` Stefan Agner
2018-07-12 22:43                 ` Kees Cook
2018-07-12 22:43                   ` Kees Cook
2018-07-12 23:01                   ` Russell King - ARM Linux
2018-07-12 23:01                     ` Russell King - ARM Linux
2018-07-13  8:07                     ` Stefan Agner
2018-07-13  8:07                       ` Stefan Agner
2018-05-19 22:02               ` Dmitry Osipenko
2018-05-19 22:02                 ` Dmitry Osipenko
2018-07-12 22:59   ` Russell King - ARM Linux
2018-07-12 22:59     ` Russell King - ARM Linux
2018-03-25 18:09 ` [PATCH v2 4/6] ARM: drop no-thumb-interwork in EABI mode Stefan Agner
2018-03-25 18:09   ` Stefan Agner
2018-06-12 17:19   ` [v2,4/6] " Guenter Roeck
2018-06-12 17:19     ` Guenter Roeck
2018-06-12 17:27     ` Stefan Agner
2018-06-12 17:27       ` Stefan Agner
2018-03-25 18:09 ` [PATCH v2 5/6] ARM: add support for building ARM kernel with clang Stefan Agner
2018-03-25 18:09   ` Stefan Agner
2018-03-25 18:09 ` [PATCH v2 6/6] ARM: uaccess: remove const to avoid duplicate specifier Stefan Agner
2018-03-25 18:09   ` Stefan Agner
2018-05-07 20:24 ` [PATCH v2 0/6] ARM: clang support Stefan Agner
2018-05-07 20:24   ` Stefan Agner
2018-05-07 21:09   ` Arnd Bergmann
2018-05-07 21:09     ` Arnd Bergmann

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