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2c190da477
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>
134 lines
3.8 KiB
Makefile
134 lines
3.8 KiB
Makefile
#
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# s390/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. Remember to do have actions
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# for "archclean" and "archdep" for cleaning up and making dependencies for
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# this architecture
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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) 1994 by Linus Torvalds
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#
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ifndef CONFIG_64BIT
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LD_BFD := elf32-s390
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LDFLAGS := -m elf_s390
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KBUILD_CFLAGS += -m31
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KBUILD_AFLAGS += -m31
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UTS_MACHINE := s390
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STACK_SIZE := 8192
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CHECKFLAGS += -D__s390__ -msize-long
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else
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LD_BFD := elf64-s390
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LDFLAGS := -m elf64_s390
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KBUILD_AFLAGS_MODULE += -fpic -D__PIC__
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KBUILD_CFLAGS_MODULE += -fpic -D__PIC__
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KBUILD_CFLAGS += -m64
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KBUILD_AFLAGS += -m64
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UTS_MACHINE := s390x
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STACK_SIZE := 16384
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CHECKFLAGS += -D__s390__ -D__s390x__
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endif
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export LD_BFD
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cflags-$(CONFIG_MARCH_G5) += $(call cc-option,-march=g5)
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cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
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cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
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cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109)
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cflags-$(CONFIG_MARCH_Z10) += $(call cc-option,-march=z10)
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cflags-$(CONFIG_MARCH_Z196) += $(call cc-option,-march=z196)
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#KBUILD_IMAGE is necessary for make rpm
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KBUILD_IMAGE :=arch/s390/boot/image
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#
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# Prevent tail-call optimizations, to get clearer backtraces:
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#
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cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
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# old style option for packed stacks
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ifeq ($(call cc-option-yn,-mkernel-backchain),y)
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cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK
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aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
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cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
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aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
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ifdef CONFIG_SMALL_STACK
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STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
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endif
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endif
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# new style option for packed stacks
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ifeq ($(call cc-option-yn,-mpacked-stack),y)
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cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
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aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
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cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
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aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
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ifdef CONFIG_SMALL_STACK
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STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
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endif
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endif
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ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
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cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
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ifneq ($(call cc-option-yn,-mstack-size=8192),y)
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cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
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endif
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endif
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ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
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cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
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endif
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KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
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KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
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KBUILD_AFLAGS += $(aflags-y)
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OBJCOPYFLAGS := -O binary
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LDFLAGS_vmlinux := -e start
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head-y := arch/s390/kernel/head.o
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head-y += arch/s390/kernel/$(if $(CONFIG_64BIT),head64.o,head31.o)
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head-y += arch/s390/kernel/init_task.o
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# See arch/s390/Kbuild for content of core part of the kernel
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core-y += arch/s390/
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libs-y += arch/s390/lib/
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drivers-y += drivers/s390/
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drivers-$(CONFIG_MATHEMU) += arch/s390/math-emu/
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# must be linked after kernel
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drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
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boot := arch/s390/boot
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all: image bzImage
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install: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $@
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image bzImage: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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zfcpdump:
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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vdso_install:
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ifeq ($(CONFIG_64BIT),y)
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$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
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endif
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$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
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archclean:
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$(Q)$(MAKE) $(clean)=$(boot)
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# Don't use tabs in echo arguments
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define archhelp
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echo '* image - Kernel image for IPL ($(boot)/image)'
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echo '* bzImage - Compressed kernel image for IPL ($(boot)/bzImage)'
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endef
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