forked from luck/tmp_suning_uos_patched
6f685c5cdd
Various binutils versions can resolve Thumb-2 branches to locally-defined, preemptible global symbols as short-range "b.n" branch instructions. This is a problem, because there's no guarantee the final destination of the symbol, or any candidate locations for a trampoline, are within range of the branch. For this reason, the kernel does not support fixing up the R_ARM_THM_JUMP11 (102) relocation in modules at all, and it makes little sense to add support. The symptom is that the kernel fails with an "unsupported relocation" error when loading some modules. Until fixed tools are available, passing -fno-optimize-sibling-calls to gcc should prevent gcc generating code which hits this problem, at the cost of a bit of extra runtime stack usage in some cases. The problem is described in more detail at: https://bugs.launchpad.net/binutils-linaro/+bug/725126 Only Thumb-2 kernels are affected. This patch adds a new CONFIG_THUMB2_AVOID_R_ARM_THM_JUMP11 config option which adds -fno-optimize-sibling-calls to CFLAGS_MODULE when building a Thumb-2 kernel. Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
313 lines
11 KiB
Makefile
313 lines
11 KiB
Makefile
#
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# arch/arm/Makefile
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#
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# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies.
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 1995-2001 by Russell King
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LDFLAGS_vmlinux :=-p --no-undefined -X
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ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
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LDFLAGS_vmlinux += --be8
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endif
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OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
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GZFLAGS :=-9
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#KBUILD_CFLAGS +=-pipe
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# Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:
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KBUILD_CFLAGS +=$(call cc-option,-marm,)
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# Never generate .eh_frame
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KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
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# Do not use arch/arm/defconfig - it's always outdated.
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# Select a platform tht is kept up-to-date
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KBUILD_DEFCONFIG := versatile_defconfig
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# defines filename extension depending memory management type.
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ifeq ($(CONFIG_MMU),)
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MMUEXT := -nommu
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endif
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ifeq ($(CONFIG_FRAME_POINTER),y)
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KBUILD_CFLAGS +=-fno-omit-frame-pointer -mapcs -mno-sched-prolog
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endif
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ifeq ($(CONFIG_CC_STACKPROTECTOR),y)
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KBUILD_CFLAGS +=-fstack-protector
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endif
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ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
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KBUILD_CPPFLAGS += -mbig-endian
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AS += -EB
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LD += -EB
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else
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KBUILD_CPPFLAGS += -mlittle-endian
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AS += -EL
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LD += -EL
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endif
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comma = ,
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# This selects which instruction set is used.
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# Note that GCC does not numerically define an architecture version
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# macro, but instead defines a whole series of macros which makes
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# testing for a specific architecture or later rather impossible.
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arch-$(CONFIG_CPU_32v7) :=-D__LINUX_ARM_ARCH__=7 $(call cc-option,-march=armv7-a,-march=armv5t -Wa$(comma)-march=armv7-a)
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arch-$(CONFIG_CPU_32v6) :=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)
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# Only override the compiler option if ARMv6. The ARMv6K extensions are
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# always available in ARMv7
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ifeq ($(CONFIG_CPU_32v6),y)
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arch-$(CONFIG_CPU_32v6K) :=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6k,-march=armv5t -Wa$(comma)-march=armv6k)
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endif
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arch-$(CONFIG_CPU_32v5) :=-D__LINUX_ARM_ARCH__=5 $(call cc-option,-march=armv5te,-march=armv4t)
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arch-$(CONFIG_CPU_32v4T) :=-D__LINUX_ARM_ARCH__=4 -march=armv4t
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arch-$(CONFIG_CPU_32v4) :=-D__LINUX_ARM_ARCH__=4 -march=armv4
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arch-$(CONFIG_CPU_32v3) :=-D__LINUX_ARM_ARCH__=3 -march=armv3
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# This selects how we optimise for the processor.
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tune-$(CONFIG_CPU_ARM610) :=-mtune=arm610
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tune-$(CONFIG_CPU_ARM710) :=-mtune=arm710
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tune-$(CONFIG_CPU_ARM7TDMI) :=-mtune=arm7tdmi
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tune-$(CONFIG_CPU_ARM720T) :=-mtune=arm7tdmi
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tune-$(CONFIG_CPU_ARM740T) :=-mtune=arm7tdmi
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tune-$(CONFIG_CPU_ARM9TDMI) :=-mtune=arm9tdmi
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tune-$(CONFIG_CPU_ARM940T) :=-mtune=arm9tdmi
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tune-$(CONFIG_CPU_ARM946E) :=$(call cc-option,-mtune=arm9e,-mtune=arm9tdmi)
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tune-$(CONFIG_CPU_ARM920T) :=-mtune=arm9tdmi
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tune-$(CONFIG_CPU_ARM922T) :=-mtune=arm9tdmi
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tune-$(CONFIG_CPU_ARM925T) :=-mtune=arm9tdmi
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tune-$(CONFIG_CPU_ARM926T) :=-mtune=arm9tdmi
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tune-$(CONFIG_CPU_FA526) :=-mtune=arm9tdmi
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tune-$(CONFIG_CPU_SA110) :=-mtune=strongarm110
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tune-$(CONFIG_CPU_SA1100) :=-mtune=strongarm1100
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tune-$(CONFIG_CPU_XSCALE) :=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
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tune-$(CONFIG_CPU_XSC3) :=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
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tune-$(CONFIG_CPU_FEROCEON) :=$(call cc-option,-mtune=marvell-f,-mtune=xscale)
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tune-$(CONFIG_CPU_V6) :=$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm)
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ifeq ($(CONFIG_AEABI),y)
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CFLAGS_ABI :=-mabi=aapcs-linux -mno-thumb-interwork
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else
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CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
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endif
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ifeq ($(CONFIG_ARM_UNWIND),y)
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CFLAGS_ABI +=-funwind-tables
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endif
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ifeq ($(CONFIG_THUMB2_KERNEL),y)
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AFLAGS_AUTOIT :=$(call as-option,-Wa$(comma)-mimplicit-it=always,-Wa$(comma)-mauto-it)
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AFLAGS_NOWARN :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
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CFLAGS_THUMB2 :=-mthumb $(AFLAGS_AUTOIT) $(AFLAGS_NOWARN)
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AFLAGS_THUMB2 :=$(CFLAGS_THUMB2) -Wa$(comma)-mthumb
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# Work around buggy relocation from gas if requested:
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ifeq ($(CONFIG_THUMB2_AVOID_R_ARM_THM_JUMP11),y)
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CFLAGS_MODULE +=-fno-optimize-sibling-calls
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endif
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endif
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# Need -Uarm for gcc < 3.x
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KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_THUMB2) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
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KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_THUMB2) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float
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CHECKFLAGS += -D__arm__
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#Default value
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head-y := arch/arm/kernel/head$(MMUEXT).o arch/arm/kernel/init_task.o
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textofs-y := 0x00008000
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textofs-$(CONFIG_ARCH_CLPS711X) := 0x00028000
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# We don't want the htc bootloader to corrupt kernel during resume
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textofs-$(CONFIG_PM_H1940) := 0x00108000
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# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
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ifeq ($(CONFIG_ARCH_SA1100),y)
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textofs-$(CONFIG_SA1111) := 0x00208000
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endif
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# Machine directory name. This list is sorted alphanumerically
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# by CONFIG_* macro name.
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machine-$(CONFIG_ARCH_AAEC2000) := aaec2000
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machine-$(CONFIG_ARCH_AT91) := at91
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machine-$(CONFIG_ARCH_BCMRING) := bcmring
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machine-$(CONFIG_ARCH_CLPS711X) := clps711x
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machine-$(CONFIG_ARCH_CNS3XXX) := cns3xxx
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machine-$(CONFIG_ARCH_DAVINCI) := davinci
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machine-$(CONFIG_ARCH_DOVE) := dove
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machine-$(CONFIG_ARCH_EBSA110) := ebsa110
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machine-$(CONFIG_ARCH_EP93XX) := ep93xx
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machine-$(CONFIG_ARCH_GEMINI) := gemini
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machine-$(CONFIG_ARCH_H720X) := h720x
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machine-$(CONFIG_ARCH_INTEGRATOR) := integrator
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machine-$(CONFIG_ARCH_IOP13XX) := iop13xx
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machine-$(CONFIG_ARCH_IOP32X) := iop32x
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machine-$(CONFIG_ARCH_IOP33X) := iop33x
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machine-$(CONFIG_ARCH_IXP2000) := ixp2000
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machine-$(CONFIG_ARCH_IXP23XX) := ixp23xx
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machine-$(CONFIG_ARCH_IXP4XX) := ixp4xx
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machine-$(CONFIG_ARCH_KIRKWOOD) := kirkwood
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machine-$(CONFIG_ARCH_KS8695) := ks8695
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machine-$(CONFIG_ARCH_LH7A40X) := lh7a40x
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machine-$(CONFIG_ARCH_LOKI) := loki
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machine-$(CONFIG_ARCH_LPC32XX) := lpc32xx
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machine-$(CONFIG_ARCH_MMP) := mmp
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machine-$(CONFIG_ARCH_MSM) := msm
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machine-$(CONFIG_ARCH_MV78XX0) := mv78xx0
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machine-$(CONFIG_ARCH_MX1) := imx
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machine-$(CONFIG_ARCH_MX2) := imx
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machine-$(CONFIG_ARCH_MX25) := imx
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machine-$(CONFIG_ARCH_MX3) := mx3
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machine-$(CONFIG_ARCH_MX5) := mx5
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machine-$(CONFIG_ARCH_MXC91231) := mxc91231
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machine-$(CONFIG_ARCH_MXS) := mxs
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machine-$(CONFIG_ARCH_NETX) := netx
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machine-$(CONFIG_ARCH_NOMADIK) := nomadik
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machine-$(CONFIG_ARCH_NS9XXX) := ns9xxx
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machine-$(CONFIG_ARCH_OMAP1) := omap1
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machine-$(CONFIG_ARCH_OMAP2) := omap2
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machine-$(CONFIG_ARCH_OMAP3) := omap2
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machine-$(CONFIG_ARCH_OMAP4) := omap2
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machine-$(CONFIG_ARCH_ORION5X) := orion5x
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machine-$(CONFIG_ARCH_PNX4008) := pnx4008
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machine-$(CONFIG_ARCH_PXA) := pxa
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machine-$(CONFIG_ARCH_REALVIEW) := realview
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machine-$(CONFIG_ARCH_RPC) := rpc
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machine-$(CONFIG_ARCH_S3C2410) := s3c2410 s3c2400 s3c2412 s3c2416 s3c2440 s3c2443
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machine-$(CONFIG_ARCH_S3C24A0) := s3c24a0
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machine-$(CONFIG_ARCH_S3C64XX) := s3c64xx
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machine-$(CONFIG_ARCH_S5P64X0) := s5p64x0
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machine-$(CONFIG_ARCH_S5P6442) := s5p6442
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machine-$(CONFIG_ARCH_S5PC100) := s5pc100
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machine-$(CONFIG_ARCH_S5PV210) := s5pv210
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machine-$(CONFIG_ARCH_S5PV310) := s5pv310
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machine-$(CONFIG_ARCH_SA1100) := sa1100
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machine-$(CONFIG_ARCH_SHARK) := shark
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machine-$(CONFIG_ARCH_SHMOBILE) := shmobile
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machine-$(CONFIG_ARCH_STMP378X) := stmp378x
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machine-$(CONFIG_ARCH_STMP37XX) := stmp37xx
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machine-$(CONFIG_ARCH_TCC8K) := tcc8k
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machine-$(CONFIG_ARCH_TEGRA) := tegra
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machine-$(CONFIG_ARCH_U300) := u300
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machine-$(CONFIG_ARCH_U8500) := ux500
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machine-$(CONFIG_ARCH_VERSATILE) := versatile
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machine-$(CONFIG_ARCH_VEXPRESS) := vexpress
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machine-$(CONFIG_ARCH_W90X900) := w90x900
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machine-$(CONFIG_ARCH_NUC93X) := nuc93x
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machine-$(CONFIG_FOOTBRIDGE) := footbridge
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machine-$(CONFIG_MACH_SPEAR300) := spear3xx
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machine-$(CONFIG_MACH_SPEAR310) := spear3xx
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machine-$(CONFIG_MACH_SPEAR320) := spear3xx
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machine-$(CONFIG_MACH_SPEAR600) := spear6xx
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# Platform directory name. This list is sorted alphanumerically
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# by CONFIG_* macro name.
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plat-$(CONFIG_ARCH_MXC) := mxc
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plat-$(CONFIG_ARCH_OMAP) := omap
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plat-$(CONFIG_ARCH_S3C64XX) := samsung
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plat-$(CONFIG_ARCH_STMP3XXX) := stmp3xxx
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plat-$(CONFIG_ARCH_TCC_926) := tcc
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plat-$(CONFIG_PLAT_IOP) := iop
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plat-$(CONFIG_PLAT_NOMADIK) := nomadik
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plat-$(CONFIG_PLAT_ORION) := orion
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plat-$(CONFIG_PLAT_PXA) := pxa
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plat-$(CONFIG_PLAT_S3C24XX) := s3c24xx samsung
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plat-$(CONFIG_PLAT_S5P) := s5p samsung
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plat-$(CONFIG_PLAT_SPEAR) := spear
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plat-$(CONFIG_PLAT_VERSATILE) := versatile
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ifeq ($(CONFIG_ARCH_EBSA110),y)
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# This is what happens if you forget the IOCS16 line.
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# PCMCIA cards stop working.
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CFLAGS_3c589_cs.o :=-DISA_SIXTEEN_BIT_PERIPHERAL
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export CFLAGS_3c589_cs.o
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endif
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# The byte offset of the kernel image in RAM from the start of RAM.
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TEXT_OFFSET := $(textofs-y)
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# The first directory contains additional information for the boot setup code
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ifneq ($(machine-y),)
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MACHINE := arch/arm/mach-$(word 1,$(machine-y))/
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else
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MACHINE :=
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endif
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machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y))
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platdirs := $(patsubst %,arch/arm/plat-%/,$(plat-y))
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ifeq ($(KBUILD_SRC),)
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KBUILD_CPPFLAGS += $(patsubst %,-I%include,$(machdirs) $(platdirs))
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else
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KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs))
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endif
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export TEXT_OFFSET GZFLAGS MMUEXT
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# Do we have FASTFPE?
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FASTFPE :=arch/arm/fastfpe
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ifeq ($(FASTFPE),$(wildcard $(FASTFPE)))
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FASTFPE_OBJ :=$(FASTFPE)/
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endif
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core-$(CONFIG_FPE_NWFPE) += arch/arm/nwfpe/
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core-$(CONFIG_FPE_FASTFPE) += $(FASTFPE_OBJ)
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core-$(CONFIG_VFP) += arch/arm/vfp/
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# If we have a machine-specific directory, then include it in the build.
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core-y += arch/arm/kernel/ arch/arm/mm/ arch/arm/common/
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core-y += $(machdirs) $(platdirs)
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drivers-$(CONFIG_OPROFILE) += arch/arm/oprofile/
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libs-y := arch/arm/lib/ $(libs-y)
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# Default target when executing plain make
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ifeq ($(CONFIG_XIP_KERNEL),y)
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KBUILD_IMAGE := xipImage
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else
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KBUILD_IMAGE := zImage
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endif
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all: $(KBUILD_IMAGE)
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boot := arch/arm/boot
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archprepare:
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$(Q)$(MAKE) $(build)=arch/arm/tools include/generated/mach-types.h
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# Convert bzImage to zImage
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bzImage: zImage
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zImage Image xipImage bootpImage uImage: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
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zinstall uinstall install: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
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# We use MRPROPER_FILES and CLEAN_FILES now
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archclean:
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$(Q)$(MAKE) $(clean)=$(boot)
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# My testing targets (bypasses dependencies)
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bp:; $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage
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i zi:; $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
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define archhelp
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echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
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echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
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echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
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echo ' uImage - U-Boot wrapped zImage'
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echo ' bootpImage - Combined zImage and initial RAM disk'
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echo ' (supply initrd image via make variable INITRD=<path>)'
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echo ' install - Install uncompressed kernel'
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echo ' zinstall - Install compressed kernel'
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echo ' uinstall - Install U-Boot wrapped compressed kernel'
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echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or'
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echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
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echo ' install to $$(INSTALL_PATH) and run lilo'
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endef
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