1# SPDX-License-Identifier: GPL-2.0 2# 3# s390/Makefile 4# 5# This file is included by the global makefile so that you can add your own 6# architecture-specific flags and dependencies. Remember to do have actions 7# for "archclean" and "archdep" for cleaning up and making dependencies for 8# this architecture 9# 10# Copyright (C) 1994 by Linus Torvalds 11# 12 13LD_BFD := elf64-s390 14KBUILD_LDFLAGS := -m elf64_s390 15KBUILD_AFLAGS_MODULE += -fPIC 16KBUILD_CFLAGS_MODULE += -fPIC 17KBUILD_AFLAGS += -m64 18KBUILD_CFLAGS += -m64 19aflags_dwarf := -Wa,-gdwarf-2 20KBUILD_AFLAGS_DECOMPRESSOR := -m64 -D__ASSEMBLY__ 21KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) 22KBUILD_CFLAGS_DECOMPRESSOR := -m64 -O2 23KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY 24KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float 25KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables 26KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-option,-ffreestanding) 27KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member) 28KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) 29KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) 30UTS_MACHINE := s390x 31STACK_SIZE := 16384 32CHECKFLAGS += -D__s390__ -D__s390x__ 33 34export LD_BFD 35 36mflags-$(CONFIG_MARCH_Z900) := -march=z900 37mflags-$(CONFIG_MARCH_Z990) := -march=z990 38mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109 39mflags-$(CONFIG_MARCH_Z10) := -march=z10 40mflags-$(CONFIG_MARCH_Z196) := -march=z196 41mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 42mflags-$(CONFIG_MARCH_Z13) := -march=z13 43mflags-$(CONFIG_MARCH_Z14) := -march=z14 44 45export CC_FLAGS_MARCH := $(mflags-y) 46 47aflags-y += $(mflags-y) 48cflags-y += $(mflags-y) 49 50cflags-$(CONFIG_MARCH_Z900_TUNE) += -mtune=z900 51cflags-$(CONFIG_MARCH_Z990_TUNE) += -mtune=z990 52cflags-$(CONFIG_MARCH_Z9_109_TUNE) += -mtune=z9-109 53cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 54cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 55cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 56cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 57cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 58 59cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 60 61# 62# Prevent tail-call optimizations, to get clearer backtraces: 63# 64cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 65 66ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y) 67cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK 68aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 69endif 70 71KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 72KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 73 74ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y) 75cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) 76ifneq ($(call cc-option-yn,-mstack-size=8192),y) 77cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) 78endif 79endif 80 81ifdef CONFIG_WARN_DYNAMIC_STACK 82 ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) 83 KBUILD_CFLAGS += -mwarn-dynamicstack 84 KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack 85 endif 86endif 87 88ifdef CONFIG_EXPOLINE 89 ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y) 90 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 91 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 92 CC_FLAGS_EXPOLINE += -mindirect-branch-table 93 export CC_FLAGS_EXPOLINE 94 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 95 aflags-y += -DCC_USING_EXPOLINE 96 endif 97endif 98 99ifdef CONFIG_FUNCTION_TRACER 100 ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n) 101 # make use of hotpatch feature if the compiler supports it 102 cc_hotpatch := -mhotpatch=0,3 103 ifeq ($(call cc-option-yn,$(cc_hotpatch)),y) 104 CC_FLAGS_FTRACE := $(cc_hotpatch) 105 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 106 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 107 endif 108 endif 109endif 110 111# Test CFI features of binutils 112cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 113 114KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) 115KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare 116KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 117KBUILD_AFLAGS += $(aflags-y) $(cfi) 118export KBUILD_AFLAGS_DECOMPRESSOR 119export KBUILD_CFLAGS_DECOMPRESSOR 120 121OBJCOPYFLAGS := -O binary 122 123head-y := arch/s390/kernel/head64.o 124 125# See arch/s390/Kbuild for content of core part of the kernel 126core-y += arch/s390/ 127 128libs-y += arch/s390/lib/ 129drivers-y += drivers/s390/ 130 131# must be linked after kernel 132drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/ 133 134boot := arch/s390/boot 135syscalls := arch/s390/kernel/syscalls 136tools := arch/s390/tools 137 138all: bzImage 139 140#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 141KBUILD_IMAGE := $(boot)/bzImage 142 143install: 144 $(Q)$(MAKE) $(build)=$(boot) $@ 145 146bzImage: vmlinux 147 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 148 149zfcpdump: 150 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 151 152vdso_install: 153 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 154 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 155 156archclean: 157 $(Q)$(MAKE) $(clean)=$(boot) 158 $(Q)$(MAKE) $(clean)=$(tools) 159 160archheaders: 161 $(Q)$(MAKE) $(build)=$(syscalls) uapi 162 163archprepare: 164 $(Q)$(MAKE) $(build)=$(syscalls) kapi 165 $(Q)$(MAKE) $(build)=$(tools) kapi 166 167# Don't use tabs in echo arguments 168define archhelp 169 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 170 echo ' install - Install kernel using' 171 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 172 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 173 echo ' install to $$(INSTALL_PATH)' 174endef 175