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linux-next/arch/s390/Makefile
Luc Van Oostenryck 145167650b kbuild: add endianness flag to CHEKCFLAGS
The kernel depends on macros like __BYTE_ORDER__,
__BIG_ENDIAN__ or __LITTLE_ENDIAN__.

OTOH, sparse doesn't know about the endianness of the kernel and
by default uses the same as the machine on which sparse was built.

Ensure that sparse can predefine the macros corresponding to
how the kernel was configured by adding -m{big,little}-endian
to CHECKFLAGS in the main Makefile (and so for all archs).
Also, remove the equivalent done in arch specific Makefiles.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-05-29 22:05:08 +09:00

162 lines
4.7 KiB
Makefile

# SPDX-License-Identifier: GPL-2.0
#
# s390/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
#
# Copyright (C) 1994 by Linus Torvalds
#
LD_BFD := elf64-s390
LDFLAGS := -m elf64_s390
KBUILD_AFLAGS_MODULE += -fPIC
KBUILD_CFLAGS_MODULE += -fPIC
KBUILD_CFLAGS += -m64
KBUILD_AFLAGS += -m64
UTS_MACHINE := s390x
STACK_SIZE := 16384
CHECKFLAGS += -D__s390__ -D__s390x__
export LD_BFD
mflags-$(CONFIG_MARCH_Z900) := -march=z900
mflags-$(CONFIG_MARCH_Z990) := -march=z990
mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
mflags-$(CONFIG_MARCH_Z10) := -march=z10
mflags-$(CONFIG_MARCH_Z196) := -march=z196
mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12
mflags-$(CONFIG_MARCH_Z13) := -march=z13
mflags-$(CONFIG_MARCH_Z14) := -march=z14
export CC_FLAGS_MARCH := $(mflags-y)
aflags-y += $(mflags-y)
cflags-y += $(mflags-y)
cflags-$(CONFIG_MARCH_Z900_TUNE) += -mtune=z900
cflags-$(CONFIG_MARCH_Z990_TUNE) += -mtune=z990
cflags-$(CONFIG_MARCH_Z9_109_TUNE) += -mtune=z9-109
cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10
cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196
cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12
cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13
cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14
cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
#
# Prevent tail-call optimizations, to get clearer backtraces:
#
cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
# old style option for packed stacks
ifeq ($(call cc-option-yn,-mkernel-backchain),y)
cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK
aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
endif
# new style option for packed stacks
ifeq ($(call cc-option-yn,-mpacked-stack),y)
cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
endif
ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
ifneq ($(call cc-option-yn,-mstack-size=8192),y)
cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
endif
endif
ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
endif
ifdef CONFIG_EXPOLINE
ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
CC_FLAGS_EXPOLINE += -mfunction-return=thunk
CC_FLAGS_EXPOLINE += -mindirect-branch-table
export CC_FLAGS_EXPOLINE
cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
endif
endif
ifdef CONFIG_FUNCTION_TRACER
# make use of hotpatch feature if the compiler supports it
cc_hotpatch := -mhotpatch=0,3
ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
CC_FLAGS_FTRACE := $(cc_hotpatch)
KBUILD_AFLAGS += -DCC_USING_HOTPATCH
KBUILD_CFLAGS += -DCC_USING_HOTPATCH
endif
endif
# Test CFI features of binutils
cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi)
KBUILD_AFLAGS += $(aflags-y) $(cfi)
OBJCOPYFLAGS := -O binary
head-y := arch/s390/kernel/head.o
head-y += arch/s390/kernel/head64.o
# See arch/s390/Kbuild for content of core part of the kernel
core-y += arch/s390/
libs-y += arch/s390/lib/
drivers-y += drivers/s390/
# must be linked after kernel
drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
boot := arch/s390/boot
syscalls := arch/s390/kernel/syscalls
tools := arch/s390/tools
all: image bzImage
#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
KBUILD_IMAGE := $(boot)/bzImage
install: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $@
image bzImage: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
zfcpdump:
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
vdso_install:
$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
$(Q)$(MAKE) $(clean)=$(tools)
archheaders:
$(Q)$(MAKE) $(build)=$(syscalls) uapi
archprepare:
$(Q)$(MAKE) $(build)=$(syscalls) kapi
$(Q)$(MAKE) $(build)=$(tools) kapi
# Don't use tabs in echo arguments
define archhelp
echo '* image - Kernel image for IPL ($(boot)/image)'
echo '* bzImage - Compressed kernel image for IPL ($(boot)/bzImage)'
echo ' install - Install kernel using'
echo ' (your) ~/bin/$(INSTALLKERNEL) or'
echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
echo ' install to $$(INSTALL_PATH)'
endef