| # 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 |
| KBUILD_LDFLAGS := -m elf64_s390 |
| KBUILD_AFLAGS_MODULE += -fPIC |
| KBUILD_CFLAGS_MODULE += -fPIC |
| KBUILD_AFLAGS += -m64 |
| KBUILD_CFLAGS += -m64 |
| ifeq ($(CONFIG_RELOCATABLE),y) |
| KBUILD_CFLAGS += -fPIE |
| LDFLAGS_vmlinux := -pie |
| endif |
| aflags_dwarf := -Wa,-gdwarf-2 |
| KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__ |
| KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) |
| KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 |
| KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY |
| KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain |
| KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables |
| KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding |
| KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector |
| KBUILD_CFLAGS_DECOMPRESSOR += -fPIE |
| KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member) |
| KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) |
| KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) |
| |
| ifdef CONFIG_CC_IS_GCC |
| ifeq ($(call cc-ifversion, -ge, 1200, y), y) |
| ifeq ($(call cc-ifversion, -lt, 1300, y), y) |
| KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds) |
| KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, array-bounds) |
| endif |
| endif |
| endif |
| |
| UTS_MACHINE := s390x |
| STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384) |
| CHECKFLAGS += -D__s390__ -D__s390x__ |
| |
| export LD_BFD |
| |
| mflags-$(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-$(CONFIG_MARCH_Z14) := -march=z14 |
| mflags-$(CONFIG_MARCH_Z15) := -march=z15 |
| |
| 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-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 |
| cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 |
| |
| cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include |
| |
| # |
| # Prevent tail-call optimizations, to get clearer backtraces: |
| # |
| cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls |
| |
| ifneq ($(call cc-option,-mpacked-stack -mbackchain -msoft-float),) |
| cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK |
| aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK |
| endif |
| |
| KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) |
| KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) |
| |
| ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),) |
| CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE) |
| ifeq ($(call cc-option,-mstack-size=8192),) |
| CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD) |
| endif |
| export CC_FLAGS_CHECK_STACK |
| cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK) |
| endif |
| |
| ifdef CONFIG_EXPOLINE |
| ifneq ($(call cc-option,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),) |
| CC_FLAGS_EXPOLINE := -mindirect-branch=thunk |
| CC_FLAGS_EXPOLINE += -mfunction-return=thunk |
| CC_FLAGS_EXPOLINE += -mindirect-branch-table |
| export CC_FLAGS_EXPOLINE |
| cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE |
| aflags-y += -DCC_USING_EXPOLINE |
| endif |
| endif |
| |
| ifdef CONFIG_FUNCTION_TRACER |
| ifeq ($(call cc-option,-mfentry -mnop-mcount),) |
| # make use of hotpatch feature if the compiler supports it |
| cc_hotpatch := -mhotpatch=0,3 |
| ifneq ($(call cc-option,$(cc_hotpatch)),) |
| CC_FLAGS_FTRACE := $(cc_hotpatch) |
| KBUILD_AFLAGS += -DCC_USING_HOTPATCH |
| KBUILD_CFLAGS += -DCC_USING_HOTPATCH |
| endif |
| 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 -Wno-sign-compare |
| KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) |
| KBUILD_AFLAGS += $(aflags-y) $(cfi) |
| export KBUILD_AFLAGS_DECOMPRESSOR |
| export KBUILD_CFLAGS_DECOMPRESSOR |
| |
| OBJCOPYFLAGS := -O binary |
| |
| head-y := arch/s390/kernel/head64.o |
| |
| libs-y += arch/s390/lib/ |
| drivers-y += drivers/s390/ |
| |
| boot := arch/s390/boot |
| syscalls := arch/s390/kernel/syscalls |
| tools := arch/s390/tools |
| |
| all: bzImage |
| |
| #KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... |
| KBUILD_IMAGE := $(boot)/bzImage |
| |
| install: |
| sh -x $(srctree)/$(boot)/install.sh $(KERNELRELEASE) $(KBUILD_IMAGE) \ |
| System.map "$(INSTALL_PATH)" |
| |
| bzImage: vmlinux |
| $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
| |
| zfcpdump: |
| $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ |
| |
| vdso_install: |
| $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ |
| |
| 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 |
| ifeq ($(KBUILD_EXTMOD),) |
| # We need to generate vdso-offsets.h before compiling certain files in kernel/. |
| # In order to do that, we should use the archprepare target, but we can't since |
| # asm-offsets.h is included in some files used to generate vdso-offsets.h, and |
| # asm-offsets.h is built in prepare0, for which archprepare is a dependency. |
| # Therefore we need to generate the header after prepare0 has been made, hence |
| # this hack. |
| prepare: vdso_prepare |
| vdso_prepare: prepare0 |
| $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h |
| $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ |
| $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h) |
| endif |
| |
| # Don't use tabs in echo arguments |
| define archhelp |
| echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' |
| echo ' install - Install kernel using' |
| echo ' (your) ~/bin/$(INSTALLKERNEL) or' |
| echo ' (distribution) /sbin/$(INSTALLKERNEL) or' |
| echo ' install to $$(INSTALL_PATH)' |
| endef |