Makefile 4.7 KB

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  1. #
  2. # This file is included by the global makefile so that you can add your own
  3. # architecture-specific flags and dependencies.
  4. #
  5. # Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  6. # Licensed under the GPL
  7. #
  8. # select defconfig based on actual architecture
  9. ifeq ($(SUBARCH),x86)
  10. ifeq ($(shell uname -m),x86_64)
  11. KBUILD_DEFCONFIG := x86_64_defconfig
  12. else
  13. KBUILD_DEFCONFIG := i386_defconfig
  14. endif
  15. else
  16. KBUILD_DEFCONFIG := $(SUBARCH)_defconfig
  17. endif
  18. ARCH_DIR := arch/um
  19. OS := $(shell uname -s)
  20. # We require bash because the vmlinux link and loader script cpp use bash
  21. # features.
  22. SHELL := /bin/bash
  23. core-y += $(ARCH_DIR)/kernel/ \
  24. $(ARCH_DIR)/drivers/ \
  25. $(ARCH_DIR)/os-$(OS)/
  26. MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
  27. HEADER_ARCH := $(SUBARCH)
  28. ifneq ($(filter $(SUBARCH),x86 x86_64 i386),)
  29. HEADER_ARCH := x86
  30. endif
  31. ifdef CONFIG_64BIT
  32. KBUILD_CFLAGS += -mcmodel=large
  33. endif
  34. HOST_DIR := arch/$(HEADER_ARCH)
  35. include $(ARCH_DIR)/Makefile-skas
  36. include $(HOST_DIR)/Makefile.um
  37. core-y += $(HOST_DIR)/um/
  38. SHARED_HEADERS := $(ARCH_DIR)/include/shared
  39. ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS)
  40. ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared
  41. KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um
  42. # -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
  43. # named - it's a common symbol in libpcap, so we get a binary which crashes.
  44. #
  45. # Same things for in6addr_loopback and mktime - found in libc. For these two we
  46. # only get link-time error, luckily.
  47. #
  48. # -Dlongjmp=kernel_longjmp prevents anything from referencing the libpthread.a
  49. # embedded copy of longjmp, same thing for setjmp.
  50. #
  51. # These apply to USER_CFLAGS to.
  52. KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \
  53. $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
  54. -Dlongjmp=kernel_longjmp -Dsetjmp=kernel_setjmp \
  55. -Din6addr_loopback=kernel_in6addr_loopback \
  56. -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
  57. KBUILD_AFLAGS += $(ARCH_INCLUDE)
  58. USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
  59. $(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \
  60. -D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \
  61. -idirafter $(objtree)/include -D__KERNEL__ -D__UM_HOST__
  62. #This will adjust *FLAGS accordingly to the platform.
  63. include $(ARCH_DIR)/Makefile-os-$(OS)
  64. KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
  65. -I$(srctree)/$(HOST_DIR)/include/uapi \
  66. -I$(objtree)/$(HOST_DIR)/include/generated \
  67. -I$(objtree)/$(HOST_DIR)/include/generated/uapi
  68. # -Derrno=kernel_errno - This turns all kernel references to errno into
  69. # kernel_errno to separate them from the libc errno. This allows -fno-common
  70. # in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
  71. # errnos.
  72. # These apply to kernelspace only.
  73. #
  74. # strip leading and trailing whitespace to make the USER_CFLAGS removal of these
  75. # defines more robust
  76. KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
  77. -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
  78. KBUILD_CFLAGS += $(KERNEL_DEFINES)
  79. PHONY += linux
  80. all: linux
  81. linux: vmlinux
  82. @echo ' LINK $@'
  83. $(Q)ln -f $< $@
  84. define archhelp
  85. echo '* linux - Binary kernel image (./linux) - for backward'
  86. echo ' compatibility only, this creates a hard link to the'
  87. echo ' real kernel binary, the "vmlinux" binary you'
  88. echo ' find in the kernel root.'
  89. endef
  90. archheaders:
  91. $(Q)$(MAKE) -f $(srctree)/Makefile ARCH=$(HEADER_ARCH) asm-generic archheaders
  92. archprepare:
  93. $(Q)$(MAKE) $(build)=$(HOST_DIR)/um include/generated/user_constants.h
  94. LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
  95. LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib $(call cc-option, -no-pie)
  96. CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
  97. -fno-stack-protector $(call cc-option, -fno-stack-protector-all)
  98. # Options used by linker script
  99. export LDS_START := $(START)
  100. export LDS_ELF_ARCH := $(ELF_ARCH)
  101. export LDS_ELF_FORMAT := $(ELF_FORMAT)
  102. # The wrappers will select whether using "malloc" or the kernel allocator.
  103. LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
  104. LD_FLAGS_CMDLINE = $(foreach opt,$(KBUILD_LDFLAGS),-Wl,$(opt))
  105. # Used by link-vmlinux.sh which has special support for um link
  106. export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
  107. # When cleaning we don't include .config, so we don't include
  108. # TT or skas makefiles and don't clean skas_ptregs.h.
  109. CLEAN_FILES += linux x.i gmon.out
  110. MRPROPER_FILES += arch/$(SUBARCH)/include/generated
  111. archclean:
  112. @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
  113. -o -name '*.gcov' \) -type f -print | xargs rm -f
  114. export HEADER_ARCH SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH