Makefile 5.6 KB

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  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. LD_BFD := elf64-s390
  13. KBUILD_LDFLAGS := -m elf64_s390
  14. KBUILD_AFLAGS_MODULE += -fPIC
  15. KBUILD_CFLAGS_MODULE += -fPIC
  16. KBUILD_AFLAGS += -m64
  17. KBUILD_CFLAGS += -m64
  18. ifeq ($(CONFIG_RELOCATABLE),y)
  19. KBUILD_CFLAGS += -fPIE
  20. LDFLAGS_vmlinux := -pie
  21. endif
  22. aflags_dwarf := -Wa,-gdwarf-2
  23. KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
  24. KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
  25. KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2
  26. KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
  27. KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float
  28. KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
  29. KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
  30. KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector
  31. KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
  32. KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
  33. KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
  34. UTS_MACHINE := s390x
  35. STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384)
  36. CHECKFLAGS += -D__s390__ -D__s390x__
  37. export LD_BFD
  38. mflags-$(CONFIG_MARCH_Z900) := -march=z900
  39. mflags-$(CONFIG_MARCH_Z990) := -march=z990
  40. mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
  41. mflags-$(CONFIG_MARCH_Z10) := -march=z10
  42. mflags-$(CONFIG_MARCH_Z196) := -march=z196
  43. mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12
  44. mflags-$(CONFIG_MARCH_Z13) := -march=z13
  45. mflags-$(CONFIG_MARCH_Z14) := -march=z14
  46. mflags-$(CONFIG_MARCH_Z15) := -march=z15
  47. export CC_FLAGS_MARCH := $(mflags-y)
  48. aflags-y += $(mflags-y)
  49. cflags-y += $(mflags-y)
  50. cflags-$(CONFIG_MARCH_Z900_TUNE) += -mtune=z900
  51. cflags-$(CONFIG_MARCH_Z990_TUNE) += -mtune=z990
  52. cflags-$(CONFIG_MARCH_Z9_109_TUNE) += -mtune=z9-109
  53. cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10
  54. cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196
  55. cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12
  56. cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13
  57. cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14
  58. cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15
  59. cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
  60. #
  61. # Prevent tail-call optimizations, to get clearer backtraces:
  62. #
  63. cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
  64. ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y)
  65. cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
  66. aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
  67. endif
  68. KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
  69. KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
  70. ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
  71. cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
  72. ifneq ($(call cc-option-yn,-mstack-size=8192),y)
  73. cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
  74. endif
  75. endif
  76. ifdef CONFIG_WARN_DYNAMIC_STACK
  77. ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
  78. KBUILD_CFLAGS += -mwarn-dynamicstack
  79. KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
  80. endif
  81. endif
  82. ifdef CONFIG_EXPOLINE
  83. ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
  84. CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
  85. CC_FLAGS_EXPOLINE += -mfunction-return=thunk
  86. CC_FLAGS_EXPOLINE += -mindirect-branch-table
  87. export CC_FLAGS_EXPOLINE
  88. cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
  89. aflags-y += -DCC_USING_EXPOLINE
  90. endif
  91. endif
  92. ifdef CONFIG_FUNCTION_TRACER
  93. ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
  94. # make use of hotpatch feature if the compiler supports it
  95. cc_hotpatch := -mhotpatch=0,3
  96. ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
  97. CC_FLAGS_FTRACE := $(cc_hotpatch)
  98. KBUILD_AFLAGS += -DCC_USING_HOTPATCH
  99. KBUILD_CFLAGS += -DCC_USING_HOTPATCH
  100. endif
  101. endif
  102. endif
  103. # Test CFI features of binutils
  104. cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
  105. KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
  106. KBUILD_CFLAGS += -pipe -Wno-sign-compare
  107. KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi)
  108. KBUILD_AFLAGS += $(aflags-y) $(cfi)
  109. export KBUILD_AFLAGS_DECOMPRESSOR
  110. export KBUILD_CFLAGS_DECOMPRESSOR
  111. OBJCOPYFLAGS := -O binary
  112. head-y := arch/s390/kernel/head64.o
  113. # See arch/s390/Kbuild for content of core part of the kernel
  114. core-y += arch/s390/
  115. libs-y += arch/s390/lib/
  116. drivers-y += drivers/s390/
  117. # must be linked after kernel
  118. drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
  119. boot := arch/s390/boot
  120. syscalls := arch/s390/kernel/syscalls
  121. tools := arch/s390/tools
  122. all: bzImage
  123. #KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
  124. KBUILD_IMAGE := $(boot)/bzImage
  125. install:
  126. $(Q)$(MAKE) $(build)=$(boot) $@
  127. bzImage: vmlinux
  128. $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
  129. zfcpdump:
  130. $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
  131. vdso_install:
  132. $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
  133. archclean:
  134. $(Q)$(MAKE) $(clean)=$(boot)
  135. $(Q)$(MAKE) $(clean)=$(tools)
  136. archheaders:
  137. $(Q)$(MAKE) $(build)=$(syscalls) uapi
  138. archprepare:
  139. $(Q)$(MAKE) $(build)=$(syscalls) kapi
  140. $(Q)$(MAKE) $(build)=$(tools) kapi
  141. # Don't use tabs in echo arguments
  142. define archhelp
  143. echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)'
  144. echo ' install - Install kernel using'
  145. echo ' (your) ~/bin/$(INSTALLKERNEL) or'
  146. echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
  147. echo ' install to $$(INSTALL_PATH)'
  148. endef