forked from Minki/linux
c3ff2a5193
This functionality was tentatively added in the past (commit6533b7c16e("powerpc: Initial stack protector (-fstack-protector) support")) but had to be reverted (commitf2574030b0("powerpc: Revert the initial stack protector support") because of GCC implementing it differently whether it had been built with libc support or not. Now, GCC offers the possibility to manually set the stack-protector mode (global or tls) regardless of libc support. This time, the patch selects HAVE_STACKPROTECTOR only if -mstack-protector-guard=tls is supported by GCC. On PPC32, as register r2 points to current task_struct at all time, the stack_canary located inside task_struct can be used directly by using the following GCC options: -mstack-protector-guard=tls -mstack-protector-guard-reg=r2 -mstack-protector-guard-offset=offsetof(struct task_struct, stack_canary)) The protector is disabled for prom_init and bootx_init as it is too early to handle it properly. $ echo CORRUPT_STACK > /sys/kernel/debug/provoke-crash/DIRECT [ 134.943666] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: lkdtm_CORRUPT_STACK+0x64/0x64 [ 134.943666] [ 134.955414] CPU: 0 PID: 283 Comm: sh Not tainted 4.18.0-s3k-dev-12143-ga3272be41209 #835 [ 134.963380] Call Trace: [ 134.965860] [c6615d60] [c001f76c] panic+0x118/0x260 (unreliable) [ 134.971775] [c6615dc0] [c001f654] panic+0x0/0x260 [ 134.976435] [c6615dd0] [c032c368] lkdtm_CORRUPT_STACK_STRONG+0x0/0x64 [ 134.982769] [c6615e00] [ffffffff] 0xffffffff Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
435 lines
14 KiB
Makefile
435 lines
14 KiB
Makefile
# This file is included by the global makefile so that you can add your own
|
|
# architecture-specific flags and dependencies. Remember to do have actions
|
|
# for "archclean" and "archdep" for cleaning up and making dependencies for
|
|
# this architecture.
|
|
#
|
|
# This file is subject to the terms and conditions of the GNU General Public
|
|
# License. See the file "COPYING" in the main directory of this archive
|
|
# for more details.
|
|
#
|
|
# Copyright (C) 1994 by Linus Torvalds
|
|
# Changes for PPC by Gary Thomas
|
|
# Rewritten by Cort Dougan and Paul Mackerras
|
|
#
|
|
|
|
HAS_BIARCH := $(call cc-option-yn, -m32)
|
|
|
|
# Set default 32 bits cross compilers for vdso and boot wrapper
|
|
CROSS32_COMPILE ?=
|
|
|
|
ifeq ($(HAS_BIARCH),y)
|
|
ifeq ($(CROSS32_COMPILE),)
|
|
ifdef CONFIG_PPC32
|
|
# These options will be overridden by any -mcpu option that the CPU
|
|
# or platform code sets later on the command line, but they are needed
|
|
# to set a sane 32-bit cpu target for the 64-bit cross compiler which
|
|
# may default to the wrong ISA.
|
|
KBUILD_CFLAGS += -mcpu=powerpc
|
|
KBUILD_AFLAGS += -mcpu=powerpc
|
|
endif
|
|
endif
|
|
endif
|
|
|
|
ifeq ($(CROSS_COMPILE),)
|
|
KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
|
|
else
|
|
KBUILD_DEFCONFIG := ppc64_defconfig
|
|
endif
|
|
|
|
ifdef CONFIG_PPC64
|
|
new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
|
|
|
|
ifeq ($(new_nm),y)
|
|
NM := $(NM) --synthetic
|
|
endif
|
|
endif
|
|
|
|
# BITS is used as extension for files which are available in a 32 bit
|
|
# and a 64 bit version to simplify shared Makefiles.
|
|
# e.g.: obj-y += foo_$(BITS).o
|
|
export BITS
|
|
|
|
ifdef CONFIG_PPC64
|
|
BITS := 64
|
|
else
|
|
BITS := 32
|
|
endif
|
|
|
|
machine-y = ppc
|
|
machine-$(CONFIG_PPC64) += 64
|
|
machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
|
|
UTS_MACHINE := $(subst $(space),,$(machine-y))
|
|
|
|
# XXX This needs to be before we override LD below
|
|
ifdef CONFIG_PPC32
|
|
KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
|
|
else
|
|
KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds
|
|
ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
|
|
# Have the linker provide sfpr if possible.
|
|
# There is a corresponding test in arch/powerpc/lib/Makefile
|
|
KBUILD_LDFLAGS_MODULE += --save-restore-funcs
|
|
else
|
|
KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
|
|
endif
|
|
endif
|
|
|
|
ifdef CONFIG_CPU_LITTLE_ENDIAN
|
|
KBUILD_CFLAGS += -mlittle-endian
|
|
KBUILD_LDFLAGS += -EL
|
|
LDEMULATION := lppc
|
|
GNUTARGET := powerpcle
|
|
MULTIPLEWORD := -mno-multiple
|
|
KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
|
|
else
|
|
KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
|
|
KBUILD_LDFLAGS += -EB
|
|
LDEMULATION := ppc
|
|
GNUTARGET := powerpc
|
|
MULTIPLEWORD := -mmultiple
|
|
endif
|
|
|
|
ifdef CONFIG_PPC64
|
|
cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
|
|
cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
|
|
aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
|
|
aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
|
|
endif
|
|
|
|
ifneq ($(cc-name),clang)
|
|
cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
|
|
endif
|
|
|
|
cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
|
|
cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
|
|
aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
|
|
aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
|
|
|
|
ifeq ($(HAS_BIARCH),y)
|
|
KBUILD_CFLAGS += -m$(BITS)
|
|
KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS)
|
|
KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
|
|
KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET)
|
|
endif
|
|
|
|
cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
|
|
cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
|
|
|
|
LDFLAGS_vmlinux-y := -Bstatic
|
|
LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
|
|
LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
|
|
LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
|
|
|
|
ifdef CONFIG_PPC64
|
|
ifeq ($(call cc-option-yn,-mcmodel=medium),y)
|
|
# -mcmodel=medium breaks modules because it uses 32bit offsets from
|
|
# the TOC pointer to create pointers where possible. Pointers into the
|
|
# percpu data area are created by this method.
|
|
#
|
|
# The kernel module loader relocates the percpu data section from the
|
|
# original location (starting with 0xd...) to somewhere in the base
|
|
# kernel percpu data space (starting with 0xc...). We need a full
|
|
# 64bit relocation for this to work, hence -mcmodel=large.
|
|
KBUILD_CFLAGS_MODULE += -mcmodel=large
|
|
else
|
|
export NO_MINIMAL_TOC := -mno-minimal-toc
|
|
endif
|
|
endif
|
|
|
|
CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
|
|
ifdef CONFIG_CPU_LITTLE_ENDIAN
|
|
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
|
|
AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
|
|
else
|
|
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
|
|
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
|
|
AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
|
|
endif
|
|
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
|
|
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
|
|
|
|
CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD)
|
|
CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
|
|
|
|
ifdef CONFIG_PPC_BOOK3S_64
|
|
ifdef CONFIG_CPU_LITTLE_ENDIAN
|
|
CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
|
|
CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
|
|
else
|
|
CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
|
|
CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
|
|
endif
|
|
else
|
|
CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
|
|
endif
|
|
|
|
ifdef CONFIG_FUNCTION_TRACER
|
|
CC_FLAGS_FTRACE := -pg
|
|
ifdef CONFIG_MPROFILE_KERNEL
|
|
CC_FLAGS_FTRACE += -mprofile-kernel
|
|
endif
|
|
# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
|
|
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
|
|
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
|
|
ifneq ($(cc-name),clang)
|
|
CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
|
|
endif
|
|
endif
|
|
|
|
CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
|
|
|
|
# Altivec option not allowed with e500mc64 in GCC.
|
|
ifdef CONFIG_ALTIVEC
|
|
E5500_CPU := -mcpu=powerpc64
|
|
else
|
|
E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
|
|
endif
|
|
CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
|
|
CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
|
|
|
|
ifdef CONFIG_PPC32
|
|
ifdef CONFIG_PPC_E500MC
|
|
CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
|
|
else
|
|
CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
|
|
endif
|
|
endif
|
|
|
|
asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
|
|
|
|
KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
|
|
KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y)
|
|
KBUILD_CFLAGS += $(call cc-option,-msoft-float)
|
|
KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
|
|
CPP = $(CC) -E $(KBUILD_CFLAGS)
|
|
|
|
CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
|
|
ifdef CONFIG_CPU_BIG_ENDIAN
|
|
CHECKFLAGS += -D__BIG_ENDIAN__
|
|
else
|
|
CHECKFLAGS += -D__LITTLE_ENDIAN__
|
|
endif
|
|
|
|
ifdef CONFIG_476FPE_ERR46
|
|
KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
|
|
-T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
|
|
endif
|
|
|
|
# No AltiVec or VSX instructions when building kernel
|
|
KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
|
|
KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
|
|
|
|
# No SPE instruction when building kernel
|
|
# (We use all available options to help semi-broken compilers)
|
|
KBUILD_CFLAGS += $(call cc-option,-mno-spe)
|
|
KBUILD_CFLAGS += $(call cc-option,-mspe=no)
|
|
|
|
# Enable unit-at-a-time mode when possible. It shrinks the
|
|
# kernel considerably.
|
|
KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
|
|
|
|
# FIXME: the module load should be taught about the additional relocs
|
|
# generated by this.
|
|
# revert to pre-gcc-4.4 behaviour of .eh_frame
|
|
KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
|
|
|
|
# Never use string load/store instructions as they are
|
|
# often slow when they are implemented at all
|
|
KBUILD_CFLAGS += $(call cc-option,-mno-string)
|
|
|
|
ifdef CONFIG_6xx
|
|
KBUILD_CFLAGS += -mcpu=powerpc
|
|
endif
|
|
|
|
cpu-as-$(CONFIG_4xx) += -Wa,-m405
|
|
cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
|
|
cpu-as-$(CONFIG_E200) += -Wa,-me200
|
|
cpu-as-$(CONFIG_E500) += -Wa,-me500
|
|
cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4
|
|
cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
|
|
|
|
KBUILD_AFLAGS += $(cpu-as-y)
|
|
KBUILD_CFLAGS += $(cpu-as-y)
|
|
|
|
KBUILD_AFLAGS += $(aflags-y)
|
|
KBUILD_CFLAGS += $(cflags-y)
|
|
|
|
head-y := arch/powerpc/kernel/head_$(BITS).o
|
|
head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
|
|
head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
|
|
head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
|
|
head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
|
|
|
|
head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
|
|
head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
|
|
head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
|
|
head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
|
|
|
|
core-y += arch/powerpc/kernel/ \
|
|
arch/powerpc/mm/ \
|
|
arch/powerpc/lib/ \
|
|
arch/powerpc/sysdev/ \
|
|
arch/powerpc/platforms/ \
|
|
arch/powerpc/math-emu/ \
|
|
arch/powerpc/crypto/ \
|
|
arch/powerpc/net/
|
|
core-$(CONFIG_XMON) += arch/powerpc/xmon/
|
|
core-$(CONFIG_KVM) += arch/powerpc/kvm/
|
|
core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
|
|
core-$(CONFIG_KEXEC_FILE) += arch/powerpc/purgatory/
|
|
|
|
drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
|
|
|
|
# Default to zImage, override when needed
|
|
all: zImage
|
|
|
|
# With make 3.82 we cannot mix normal and wildcard targets
|
|
BOOT_TARGETS1 := zImage zImage.initrd uImage
|
|
BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
|
|
|
|
PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
|
|
|
|
boot := arch/$(ARCH)/boot
|
|
|
|
$(BOOT_TARGETS1): vmlinux
|
|
$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
|
|
$(BOOT_TARGETS2): vmlinux
|
|
$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
|
|
|
|
|
|
bootwrapper_install:
|
|
$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
|
|
|
|
%.dtb: scripts
|
|
$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
|
|
|
|
# Used to create 'merged defconfigs'
|
|
# To use it $(call) it with the first argument as the base defconfig
|
|
# and the second argument as a space separated list of .config files to merge,
|
|
# without the .config suffix.
|
|
define merge_into_defconfig
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
|
|
-m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
|
|
$(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
|
|
+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
|
|
endef
|
|
|
|
PHONY += pseries_le_defconfig
|
|
pseries_le_defconfig:
|
|
$(call merge_into_defconfig,pseries_defconfig,le)
|
|
|
|
PHONY += ppc64le_defconfig
|
|
ppc64le_defconfig:
|
|
$(call merge_into_defconfig,ppc64_defconfig,le)
|
|
|
|
PHONY += powernv_be_defconfig
|
|
powernv_be_defconfig:
|
|
$(call merge_into_defconfig,powernv_defconfig,be)
|
|
|
|
PHONY += mpc85xx_defconfig
|
|
mpc85xx_defconfig:
|
|
$(call merge_into_defconfig,mpc85xx_basic_defconfig,\
|
|
85xx-32bit 85xx-hw fsl-emb-nonhw)
|
|
|
|
PHONY += mpc85xx_smp_defconfig
|
|
mpc85xx_smp_defconfig:
|
|
$(call merge_into_defconfig,mpc85xx_basic_defconfig,\
|
|
85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
|
|
|
|
PHONY += corenet32_smp_defconfig
|
|
corenet32_smp_defconfig:
|
|
$(call merge_into_defconfig,corenet_basic_defconfig,\
|
|
85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
|
|
|
|
PHONY += corenet64_smp_defconfig
|
|
corenet64_smp_defconfig:
|
|
$(call merge_into_defconfig,corenet_basic_defconfig,\
|
|
85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
|
|
|
|
PHONY += mpc86xx_defconfig
|
|
mpc86xx_defconfig:
|
|
$(call merge_into_defconfig,mpc86xx_basic_defconfig,\
|
|
86xx-hw fsl-emb-nonhw)
|
|
|
|
PHONY += mpc86xx_smp_defconfig
|
|
mpc86xx_smp_defconfig:
|
|
$(call merge_into_defconfig,mpc86xx_basic_defconfig,\
|
|
86xx-smp 86xx-hw fsl-emb-nonhw)
|
|
|
|
PHONY += ppc32_allmodconfig
|
|
ppc32_allmodconfig:
|
|
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
|
|
-f $(srctree)/Makefile allmodconfig
|
|
|
|
PHONY += ppc64le_allmodconfig
|
|
ppc64le_allmodconfig:
|
|
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
|
|
-f $(srctree)/Makefile allmodconfig
|
|
|
|
PHONY += ppc64_book3e_allmodconfig
|
|
ppc64_book3e_allmodconfig:
|
|
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
|
|
-f $(srctree)/Makefile allmodconfig
|
|
|
|
define archhelp
|
|
@echo '* zImage - Build default images selected by kernel config'
|
|
@echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
|
|
@echo ' uImage - U-Boot native image format'
|
|
@echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
|
|
@echo ' versions which do not support device trees'
|
|
@echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
|
|
@echo ' simpleImage.<dt> - Firmware independent image.'
|
|
@echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
|
|
@echo ' install - Install kernel using'
|
|
@echo ' (your) ~/bin/$(INSTALLKERNEL) or'
|
|
@echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
|
|
@echo ' install to $$(INSTALL_PATH) and run lilo'
|
|
@echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
|
|
@echo ''
|
|
@echo ' Targets with <dt> embed a device tree blob inside the image'
|
|
@echo ' These targets support board with firmware that does not'
|
|
@echo ' support passing a device tree directly. Replace <dt> with the'
|
|
@echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
|
|
@echo ' (minus the .dts extension).'
|
|
endef
|
|
|
|
install:
|
|
$(Q)$(MAKE) $(build)=$(boot) install
|
|
|
|
vdso_install:
|
|
ifdef CONFIG_PPC64
|
|
$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
|
|
endif
|
|
$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
|
|
|
|
archclean:
|
|
$(Q)$(MAKE) $(clean)=$(boot)
|
|
|
|
archprepare: checkbin
|
|
|
|
ifdef CONFIG_STACKPROTECTOR
|
|
prepare: stack_protector_prepare
|
|
|
|
stack_protector_prepare: prepare0
|
|
$(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
|
|
endif
|
|
|
|
# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
|
|
# to stdout and these checks are run even on install targets.
|
|
TOUT := .tmp_gas_check
|
|
|
|
# Check toolchain versions:
|
|
# - gcc-4.6 is the minimum kernel-wide version so nothing required.
|
|
checkbin:
|
|
@if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
|
|
&& $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
|
|
echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
|
|
echo 'in some circumstances.' ; \
|
|
echo -n '*** Please use a different binutils version.' ; \
|
|
false ; \
|
|
fi
|
|
|
|
|
|
CLEAN_FILES += $(TOUT)
|
|
|