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. 7 # 8 # Copyright (C) 1994 by Linus Torvalds 9 # 10 11 LD_BFD := elf64-s390 12 KBUILD_LDFLAGS := -m elf64_s390 13 KBUILD_AFLAGS_MODULE += -fPIC 14 KBUILD_CFLAGS_MODULE += -fPIC 15 KBUILD_AFLAGS += -m64 16 KBUILD_CFLAGS += -m64 17 KBUILD_CFLAGS += -fPIC 18 LDFLAGS_vmlinux := -no-pie --emit-relocs --discard-none 19 extra_tools := relocs 20 aflags_dwarf := -Wa,-gdwarf-2 21 KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__ 22 ifndef CONFIG_AS_IS_LLVM 23 KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) 24 endif 25 KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 -mpacked-stack 26 KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY 27 KBUILD_CFLAGS_DECOMPRESSOR += -D__DECOMPRESSOR 28 KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain 29 KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables 30 KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding 31 KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector 32 KBUILD_CFLAGS_DECOMPRESSOR += -fPIE 33 KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member) 34 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) 35 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) 36 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_CC_NO_ARRAY_BOUNDS),-Wno-array-bounds) 37 38 UTS_MACHINE := s390x 39 STACK_SIZE := $(if $(CONFIG_KASAN),65536,$(if $(CONFIG_KMSAN),65536,16384)) 40 CHECKFLAGS += -D__s390__ -D__s390x__ 41 42 export LD_BFD 43 44 mflags-$(CONFIG_MARCH_Z10) := -march=z10 45 mflags-$(CONFIG_MARCH_Z196) := -march=z196 46 mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 47 mflags-$(CONFIG_MARCH_Z13) := -march=z13 48 mflags-$(CONFIG_MARCH_Z14) := -march=z14 49 mflags-$(CONFIG_MARCH_Z15) := -march=z15 50 mflags-$(CONFIG_MARCH_Z16) := -march=z16 51 52 export CC_FLAGS_MARCH := $(mflags-y) 53 54 aflags-y += $(mflags-y) 55 cflags-y += $(mflags-y) 56 57 cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 58 cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 59 cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 60 cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 61 cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 62 cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 63 cflags-$(CONFIG_MARCH_Z16_TUNE) += -mtune=z16 64 65 cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 66 67 # 68 # Prevent tail-call optimizations, to get clearer backtraces: 69 # 70 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 71 72 KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 73 KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 74 75 ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),) 76 CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE) 77 ifeq ($(call cc-option,-mstack-size=8192),) 78 CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD) 79 endif 80 export CC_FLAGS_CHECK_STACK 81 cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK) 82 endif 83 84 ifdef CONFIG_EXPOLINE 85 ifdef CONFIG_EXPOLINE_EXTERN 86 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern 87 CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern 88 else 89 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 90 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 91 endif 92 CC_FLAGS_EXPOLINE += -mindirect-branch-table 93 export CC_FLAGS_EXPOLINE 94 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 95 aflags-y += -DCC_USING_EXPOLINE 96 endif 97 98 ifdef CONFIG_FUNCTION_TRACER 99 ifeq ($(call cc-option,-mfentry -mnop-mcount),) 100 # make use of hotpatch feature if the compiler supports it 101 cc_hotpatch := -mhotpatch=0,3 102 ifneq ($(call cc-option,$(cc_hotpatch)),) 103 CC_FLAGS_FTRACE := $(cc_hotpatch) 104 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 105 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 106 endif 107 endif 108 endif 109 110 # Test CFI features of binutils 111 cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 112 113 KBUILD_CFLAGS += -mpacked-stack -mbackchain -msoft-float $(cflags-y) 114 KBUILD_CFLAGS += -pipe -Wno-sign-compare 115 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 116 KBUILD_AFLAGS += $(aflags-y) $(cfi) 117 export KBUILD_AFLAGS_DECOMPRESSOR 118 export KBUILD_CFLAGS_DECOMPRESSOR 119 120 OBJCOPYFLAGS := -O binary 121 122 libs-y += arch/s390/lib/ 123 124 boot := arch/s390/boot 125 syscalls := arch/s390/kernel/syscalls 126 tools := arch/s390/tools 127 128 all: bzImage 129 130 #KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 131 KBUILD_IMAGE := $(boot)/bzImage 132 133 install: 134 $(call cmd,install) 135 136 bzImage: vmlinux 137 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 138 139 zfcpdump: 140 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 141 142 archheaders: 143 $(Q)$(MAKE) $(build)=$(syscalls) uapi 144 145 archprepare: 146 $(Q)$(MAKE) $(build)=$(syscalls) kapi 147 $(Q)$(MAKE) $(build)=$(tools) kapi $(extra_tools) 148 ifeq ($(KBUILD_EXTMOD),) 149 # We need to generate vdso-offsets.h before compiling certain files in kernel/. 150 # In order to do that, we should use the archprepare target, but we can't since 151 # asm-offsets.h is included in some files used to generate vdso-offsets.h, and 152 # asm-offsets.h is built in prepare0, for which archprepare is a dependency. 153 # Therefore we need to generate the header after prepare0 has been made, hence 154 # this hack. 155 prepare: vdso_prepare 156 vdso_prepare: prepare0 157 $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h 158 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ 159 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h) 160 161 vdso-install-y += arch/s390/kernel/vdso64/vdso64.so.dbg 162 vdso-install-$(CONFIG_COMPAT) += arch/s390/kernel/vdso32/vdso32.so.dbg 163 164 endif 165 166 # Don't use tabs in echo arguments 167 define archhelp 168 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 169 echo ' install - Install kernel using' 170 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 171 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 172 echo ' install to $$(INSTALL_PATH)' 173 endef
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