linux/arch/s390/Makefile
Jan Glauber 2c190da477 [S390] remove redundant stack check option
Newer gcc versions offer an architecture-independent option to check
the stack size and warn if it reaches a certain limit. This option
already existed for s390 by using -mwarn-dynamicstack. Since one
stack check option is enough remove the s390 specific stack check
but keep the option that warns about dynamic stack usage because
that is not covered by the generic option.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-03-15 17:08:22 +01:00

133 lines
3.8 KiB
Makefile

#
# 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
#
# 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
#
ifndef CONFIG_64BIT
LD_BFD := elf32-s390
LDFLAGS := -m elf_s390
KBUILD_CFLAGS += -m31
KBUILD_AFLAGS += -m31
UTS_MACHINE := s390
STACK_SIZE := 8192
CHECKFLAGS += -D__s390__ -msize-long
else
LD_BFD := elf64-s390
LDFLAGS := -m elf64_s390
KBUILD_AFLAGS_MODULE += -fpic -D__PIC__
KBUILD_CFLAGS_MODULE += -fpic -D__PIC__
KBUILD_CFLAGS += -m64
KBUILD_AFLAGS += -m64
UTS_MACHINE := s390x
STACK_SIZE := 16384
CHECKFLAGS += -D__s390__ -D__s390x__
endif
export LD_BFD
cflags-$(CONFIG_MARCH_G5) += $(call cc-option,-march=g5)
cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109)
cflags-$(CONFIG_MARCH_Z10) += $(call cc-option,-march=z10)
cflags-$(CONFIG_MARCH_Z196) += $(call cc-option,-march=z196)
#KBUILD_IMAGE is necessary for make rpm
KBUILD_IMAGE :=arch/s390/boot/image
#
# Prevent tail-call optimizations, to get clearer backtraces:
#
cflags-$(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-$(CONFIG_PACK_STACK) += -D__PACK_STACK
cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
ifdef CONFIG_SMALL_STACK
STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
endif
endif
# new style option for packed stacks
ifeq ($(call cc-option-yn,-mpacked-stack),y)
cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
ifdef CONFIG_SMALL_STACK
STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
endif
endif
ifeq ($(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
KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
KBUILD_AFLAGS += $(aflags-y)
OBJCOPYFLAGS := -O binary
LDFLAGS_vmlinux := -e start
head-y := arch/s390/kernel/head.o
head-y += arch/s390/kernel/$(if $(CONFIG_64BIT),head64.o,head31.o)
head-y += arch/s390/kernel/init_task.o
# See arch/s390/Kbuild for content of core part of the kernel
core-y += arch/s390/
libs-y += arch/s390/lib/
drivers-y += drivers/s390/
drivers-$(CONFIG_MATHEMU) += arch/s390/math-emu/
# must be linked after kernel
drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
boot := arch/s390/boot
all: image bzImage
install: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $@
image bzImage: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
zfcpdump:
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
vdso_install:
ifeq ($(CONFIG_64BIT),y)
$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
endif
$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
# 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)'
endef