arch/um/Makefile

   1 #
   2 # Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
   3 # Licensed under the GPL
   4 #
   5
   6 ARCH_DIR := arch/um
   7 OS := $(shell uname -s)
   8 # We require bash because the vmlinux link and loader script cpp use bash
   9 # features.
  10 SHELL := /bin/bash
  11
  12 filechk_gen_header = $<
  13
  14 core-y                  += $(ARCH_DIR)/kernel/          \
  15                            $(ARCH_DIR)/drivers/         \
  16                            $(ARCH_DIR)/os-$(OS)/
  17
  18 # Have to precede the include because the included Makefiles reference them.
  19 SYMLINK_HEADERS := archparam.h system.h sigcontext.h processor.h ptrace.h \
  20         module.h vm-flags.h elf.h
  21 SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header))
  22
  23 # XXX: The "os" symlink is only used by arch/um/include/os.h, which includes
  24 # ../os/include/file.h
  25 #
  26 # These are cleaned up during mrproper. Please DO NOT fix it again, this is
  27 # the Correct Thing(tm) to do!
  28 ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os \
  29         $(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h
  30
  31 GEN_HEADERS += $(ARCH_DIR)/include/task.h $(ARCH_DIR)/include/kern_constants.h
  32
  33 um-modes-$(CONFIG_MODE_TT) += tt
  34 um-modes-$(CONFIG_MODE_SKAS) += skas
  35
  36 MODE_INCLUDE    += $(foreach mode,$(um-modes-y),\
  37                    -I$(srctree)/$(ARCH_DIR)/kernel/$(mode)/include)
  38
  39 MAKEFILES-INCL  += $(foreach mode,$(um-modes-y),\
  40                    $(srctree)/$(ARCH_DIR)/Makefile-$(mode))
  41
  42 ifneq ($(MAKEFILES-INCL),)
  43   include $(MAKEFILES-INCL)
  44 endif
  45
  46 ARCH_INCLUDE    := -I$(ARCH_DIR)/include
  47 ifneq ($(KBUILD_SRC),)
  48 ARCH_INCLUDE    += -I$(ARCH_DIR)/include2
  49 ARCH_INCLUDE    += -I$(srctree)/$(ARCH_DIR)/include
  50 MRPROPER_DIRS   += $(ARCH_DIR)/include2
  51 endif
  52 SYS_DIR         := $(ARCH_DIR)/include/sysdep-$(SUBARCH)
  53
  54 include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
  55
  56 core-y += $(SUBARCH_CORE)
  57 libs-y += $(SUBARCH_LIBS)
  58
  59 # -Derrno=kernel_errno - This turns all kernel references to errno into
  60 # kernel_errno to separate them from the libc errno.  This allows -fno-common
  61 # in CFLAGS.  Otherwise, it would cause ld to complain about the two different
  62 # errnos.
  63
  64 CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
  65         $(ARCH_INCLUDE) $(MODE_INCLUDE)
  66
  67 USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))
  68 USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
  69         $(MODE_INCLUDE) $(ARCH_USER_CFLAGS)
  70 CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask
  71 CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
  72
  73 #This will adjust *FLAGS accordingly to the platform.
  74 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
  75
  76 # These are needed for clean and mrproper, since in that case .config is not
  77 # included; the values here are meaningless
  78
  79 CONFIG_NEST_LEVEL ?= 0
  80 CONFIG_KERNEL_HALF_GIGS ?= 0
  81
  82 SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
  83
  84 ifeq ($(CONFIG_MODE_SKAS), y)
  85 $(SYS_HEADERS) : $(ARCH_DIR)/include/skas_ptregs.h
  86 endif
  87
  88 .PHONY: linux
  89
  90 all: linux
  91
  92 linux: vmlinux
  93         ln -f $< $@
  94
  95 define archhelp
  96   echo '* linux         - Binary kernel image (./linux) - for backward'
  97   echo '                   compatibility only, this creates a hard link to the'
  98   echo '                   real kernel binary, the the "vmlinux" binary you'
  99   echo '                   find in the kernel root.'
 100 endef
 101
 102 ifneq ($(KBUILD_SRC),)
 103 $(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig_$(SUBARCH) $(ARCH_DIR)/Kconfig_arch)
 104 CLEAN_FILES += $(ARCH_DIR)/Kconfig_arch
 105 else
 106 $(shell cd $(ARCH_DIR) && ln -sf Kconfig_$(SUBARCH) Kconfig_arch)
 107 endif
 108
 109 prepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS)
 110
 111 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
 112 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
 113
 114 CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT
 115 CONFIG_KERNEL_STACK_ORDER ?= 2
 116 STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
 117
 118 ifndef START
 119   START = $$(($(TOP_ADDR) - $(SIZE)))
 120 endif
 121
 122 CPPFLAGS_vmlinux.lds = $(shell echo -U$(SUBARCH) \
 123         -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
 124         -DELF_FORMAT=\"$(ELF_FORMAT)\" $(CPP_MODE-y) \
 125         -DKERNEL_STACK_SIZE=$(STACK_SIZE))
 126
 127 #The wrappers will select whether using "malloc" or the kernel allocator.
 128 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
 129
 130 CFLAGS_vmlinux = $(LINK-y) $(LINK_WRAPS)
 131 define cmd_vmlinux__
 132         $(CC) $(CFLAGS_vmlinux) -o $@ \
 133         -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
 134         -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
 135         -lutil \
 136         $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \
 137         FORCE ,$^) ; rm -f linux
 138 endef
 139
 140 #When cleaning we don't include .config, so we don't include
 141 #TT or skas makefiles and don't clean skas_ptregs.h.
 142 CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
 143         $(GEN_HEADERS) $(ARCH_DIR)/include/skas_ptregs.h
 144
 145 MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \
 146         $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os \
 147         $(ARCH_DIR)/Kconfig_arch
 148
 149 archclean:
 150         $(Q)$(MAKE) $(clean)=$(ARCH_DIR)/util
 151         @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
 152                 -o -name '*.gcov' \) -type f -print | xargs rm -f
 153
 154 $(SYMLINK_HEADERS):
 155         @echo '  SYMLINK $@'
 156 ifneq ($(KBUILD_SRC),)
 157         ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@
 158 else
 159         $(Q)cd $(TOPDIR)/$(dir $@) ; \
 160         ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@)
 161 endif
 162
 163 include/asm-um/arch:
 164         @echo '  SYMLINK $@'
 165 ifneq ($(KBUILD_SRC),)
 166         $(Q)mkdir -p include/asm-um
 167         $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch
 168 else
 169         $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch
 170 endif
 171
 172 $(ARCH_DIR)/include/sysdep:
 173         @echo '  SYMLINK $@'
 174 ifneq ($(KBUILD_SRC),)
 175         $(Q)mkdir -p $(ARCH_DIR)/include
 176         $(Q)mkdir -p $(ARCH_DIR)/include2
 177         $(Q)ln -fsn sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep
 178         $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include2/sysdep
 179 else
 180         $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
 181 endif
 182
 183 $(ARCH_DIR)/os:
 184         @echo '  SYMLINK $@'
 185 ifneq ($(KBUILD_SRC),)
 186         $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os
 187 else
 188         $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os
 189 endif
 190
 191 # Generated files
 192 define filechk_umlconfig
 193         sed 's/ CONFIG/ UML_CONFIG/'
 194 endef
 195
 196 $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
 197         $(call filechk,umlconfig)
 198
 199 $(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c
 200         $(CC) $(USER_CFLAGS) -S -o $@ $<
 201
 202 $(ARCH_DIR)/user-offsets.h: $(ARCH_DIR)/user-offsets.s
 203         $(call filechk,gen-asm-offsets)
 204
 205 CLEAN_FILES += $(ARCH_DIR)/user-offsets.s  $(ARCH_DIR)/user-offsets.h
 206
 207 $(ARCH_DIR)/kernel-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/kernel-offsets.c \
 208                                    $(ARCH_SYMLINKS) \
 209                                    $(SYS_DIR)/sc.h \
 210                                    include/asm include/linux/version.h \
 211                                    include/config/MARKER \
 212                                    $(ARCH_DIR)/include/user_constants.h
 213         $(CC) $(CFLAGS) $(NOSTDINC_FLAGS) $(CPPFLAGS) -S -o $@ $<
 214
 215 $(ARCH_DIR)/kernel-offsets.h: $(ARCH_DIR)/kernel-offsets.s
 216         $(call filechk,gen-asm-offsets)
 217
 218 CLEAN_FILES += $(ARCH_DIR)/kernel-offsets.s  $(ARCH_DIR)/kernel-offsets.h
 219
 220 $(ARCH_DIR)/include/task.h: $(ARCH_DIR)/util/mk_task
 221         $(call filechk,gen_header)
 222
 223 $(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/os-$(OS)/util/mk_user_constants
 224         $(call filechk,gen_header)
 225
 226 $(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/util/mk_constants
 227         $(call filechk,gen_header)
 228
 229 $(ARCH_DIR)/include/skas_ptregs.h: $(ARCH_DIR)/kernel/skas/util/mk_ptregs
 230         $(call filechk,gen_header)
 231
 232 $(ARCH_DIR)/os-$(OS)/util/mk_user_constants: $(ARCH_DIR)/os-$(OS)/util FORCE ;
 233
 234 $(ARCH_DIR)/util/mk_task $(ARCH_DIR)/util/mk_constants: $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/util \
 235         FORCE ;
 236
 237 $(ARCH_DIR)/kernel/skas/util/mk_ptregs: $(ARCH_DIR)/kernel/skas/util FORCE ;
 238
 239 $(ARCH_DIR)/util: scripts_basic $(SYS_DIR)/sc.h $(ARCH_DIR)/kernel-offsets.h FORCE
 240         $(Q)$(MAKE) $(build)=$@
 241
 242 $(ARCH_DIR)/kernel/skas/util: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE
 243         $(Q)$(MAKE) $(build)=$@
 244
 245 $(ARCH_DIR)/os-$(OS)/util: scripts_basic FORCE
 246         $(Q)$(MAKE) $(build)=$@
 247
 248 export SUBARCH USER_CFLAGS OS