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 # -Dvmap=kernel_vmap affects everything, and prevents anything from
  55 # referencing the libpcap.o symbol so named.
  56
  57 CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
  58         $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap
  59 AFLAGS += $(ARCH_INCLUDE)
  60
  61 USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))
  62 USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
  63         $(MODE_INCLUDE)
  64
  65 # -Derrno=kernel_errno - This turns all kernel references to errno into
  66 # kernel_errno to separate them from the libc errno.  This allows -fno-common
  67 # in CFLAGS.  Otherwise, it would cause ld to complain about the two different
  68 # errnos.
  69
  70 CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask
  71 CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
  72
  73 include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
  74
  75 #This will adjust *FLAGS accordingly to the platform.
  76 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
  77
  78 # These are needed for clean and mrproper, since in that case .config is not
  79 # included; the values here are meaningless
  80
  81 CONFIG_NEST_LEVEL ?= 0
  82 CONFIG_KERNEL_HALF_GIGS ?= 0
  83
  84 SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
  85
  86 ifeq ($(CONFIG_MODE_SKAS), y)
  87 $(SYS_HEADERS) : $(ARCH_DIR)/include/skas_ptregs.h
  88 endif
  89
  90 .PHONY: linux
  91
  92 all: linux
  93
  94 linux: vmlinux
  95         ln -f $< $@
  96
  97 define archhelp
  98   echo '* linux         - Binary kernel image (./linux) - for backward'
  99   echo '                   compatibility only, this creates a hard link to the'
 100   echo '                   real kernel binary, the the "vmlinux" binary you'
 101   echo '                   find in the kernel root.'
 102 endef
 103
 104 ifneq ($(KBUILD_SRC),)
 105 $(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch)
 106 else
 107 $(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch)
 108 endif
 109
 110 archprepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS)
 111
 112 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
 113 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
 114
 115 CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT
 116 CONFIG_KERNEL_STACK_ORDER ?= 2
 117 STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
 118
 119 ifndef START
 120   START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] )
 121 endif
 122
 123 CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \
 124         -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
 125         -DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y) \
 126         -DKERNEL_STACK_SIZE=$(STACK_SIZE) \
 127         -DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap_fin.o
 128
 129 #The wrappers will select whether using "malloc" or the kernel allocator.
 130 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
 131
 132 CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS)
 133 define cmd_vmlinux__
 134         $(CC) $(CFLAGS_vmlinux) -o $@ \
 135         -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
 136         -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
 137         -lutil \
 138         $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \
 139         FORCE ,$^) ; rm -f linux
 140 endef
 141
 142 #When cleaning we don't include .config, so we don't include
 143 #TT or skas makefiles and don't clean skas_ptregs.h.
 144 CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
 145         $(GEN_HEADERS) $(ARCH_DIR)/include/skas_ptregs.h \
 146         $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/Kconfig.arch
 147
 148 MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \
 149         $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os
 150
 151 archclean:
 152         $(Q)$(MAKE) $(clean)=$(ARCH_DIR)/util
 153         $(Q)$(MAKE) $(clean)=$(ARCH_DIR)/os-$(OS)/util
 154         @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
 155                 -o -name '*.gcov' \) -type f -print | xargs rm -f
 156
 157 $(SYMLINK_HEADERS):
 158         @echo '  SYMLINK $@'
 159 ifneq ($(KBUILD_SRC),)
 160         ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@
 161 else
 162         $(Q)cd $(TOPDIR)/$(dir $@) ; \
 163         ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@)
 164 endif
 165
 166 include/asm-um/arch:
 167         @echo '  SYMLINK $@'
 168 ifneq ($(KBUILD_SRC),)
 169         $(Q)mkdir -p include/asm-um
 170         $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch
 171 else
 172         $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch
 173 endif
 174
 175 $(ARCH_DIR)/include/sysdep:
 176         @echo '  SYMLINK $@'
 177 ifneq ($(KBUILD_SRC),)
 178         $(Q)mkdir -p $(ARCH_DIR)/include
 179         $(Q)mkdir -p $(ARCH_DIR)/include2
 180         $(Q)ln -fsn sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep
 181         $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include2/sysdep
 182 else
 183         $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
 184 endif
 185
 186 $(ARCH_DIR)/os:
 187         @echo '  SYMLINK $@'
 188 ifneq ($(KBUILD_SRC),)
 189         $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os
 190 else
 191         $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os
 192 endif
 193
 194 # Generated files
 195 define filechk_umlconfig
 196         sed 's/ CONFIG/ UML_CONFIG/'
 197 endef
 198
 199 define filechk_gen-asm-offsets
 200         (set -e; \
 201          echo "#ifndef __ASM_OFFSETS_H__"; \
 202          echo "#define __ASM_OFFSETS_H__"; \
 203          echo "/*"; \
 204          echo " * DO NOT MODIFY."; \
 205          echo " *"; \
 206          echo " * This file was generated by arch/$(ARCH)/Makefile"; \
 207          echo " *"; \
 208          echo " */"; \
 209          echo ""; \
 210          sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
 211          echo ""; \
 212          echo "#endif" )
 213 endef
 214
 215 $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
 216         $(call filechk,umlconfig)
 217
 218 $(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c
 219         $(CC) $(USER_CFLAGS) -S -o $@ $<
 220
 221 $(ARCH_DIR)/user-offsets.h: $(ARCH_DIR)/user-offsets.s
 222         $(call filechk,gen-asm-offsets)
 223
 224 CLEAN_FILES += $(ARCH_DIR)/user-offsets.s  $(ARCH_DIR)/user-offsets.h
 225
 226 $(ARCH_DIR)/kernel-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/kernel-offsets.c \
 227                                    $(ARCH_SYMLINKS) \
 228                                    $(SYS_DIR)/sc.h \
 229                                    include/asm include/linux/version.h \
 230                                    include/config/MARKER \
 231                                    $(ARCH_DIR)/include/user_constants.h
 232         $(CC) $(CFLAGS) $(NOSTDINC_FLAGS) $(CPPFLAGS) -S -o $@ $<
 233
 234 $(ARCH_DIR)/kernel-offsets.h: $(ARCH_DIR)/kernel-offsets.s
 235         $(call filechk,gen-asm-offsets)
 236
 237 CLEAN_FILES += $(ARCH_DIR)/kernel-offsets.s  $(ARCH_DIR)/kernel-offsets.h
 238
 239 $(ARCH_DIR)/include/task.h: $(ARCH_DIR)/util/mk_task
 240         $(call filechk,gen_header)
 241
 242 $(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/os-$(OS)/util/mk_user_constants
 243         $(call filechk,gen_header)
 244
 245 $(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/util/mk_constants
 246         $(call filechk,gen_header)
 247
 248 $(ARCH_DIR)/include/skas_ptregs.h: $(ARCH_DIR)/kernel/skas/util/mk_ptregs
 249         $(call filechk,gen_header)
 250
 251 $(ARCH_DIR)/os-$(OS)/util/mk_user_constants: $(ARCH_DIR)/os-$(OS)/util FORCE ;
 252
 253 $(ARCH_DIR)/util/mk_task $(ARCH_DIR)/util/mk_constants: $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/util \
 254         FORCE ;
 255
 256 $(ARCH_DIR)/kernel/skas/util/mk_ptregs: $(ARCH_DIR)/kernel/skas/util FORCE ;
 257
 258 $(ARCH_DIR)/util: scripts_basic $(SYS_DIR)/sc.h $(ARCH_DIR)/kernel-offsets.h FORCE
 259         $(Q)$(MAKE) $(build)=$@
 260
 261 $(ARCH_DIR)/kernel/skas/util: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE
 262         $(Q)$(MAKE) $(build)=$@
 263
 264 $(ARCH_DIR)/os-$(OS)/util: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE
 265         $(Q)$(MAKE) $(build)=$@
 266
 267 export SUBARCH USER_CFLAGS OS