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 ldt.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) $(ARCH_DIR)/include/uml-config.h
  30
  31 um-modes-$(CONFIG_MODE_TT) += tt
  32 um-modes-$(CONFIG_MODE_SKAS) += skas
  33
  34 MODE_INCLUDE    += $(foreach mode,$(um-modes-y),\
  35                    -I$(srctree)/$(ARCH_DIR)/include/$(mode))
  36
  37 MAKEFILES-INCL  += $(foreach mode,$(um-modes-y),\
  38                    $(srctree)/$(ARCH_DIR)/Makefile-$(mode))
  39
  40 ifneq ($(MAKEFILES-INCL),)
  41   include $(MAKEFILES-INCL)
  42 endif
  43
  44 ARCH_INCLUDE    := -I$(ARCH_DIR)/include
  45 ifneq ($(KBUILD_SRC),)
  46 ARCH_INCLUDE    += -I$(srctree)/$(ARCH_DIR)/include
  47 endif
  48 SYS_DIR         := $(ARCH_DIR)/include/sysdep-$(SUBARCH)
  49
  50 # -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
  51 # named - it's a common symbol in libpcap, so we get a binary which crashes.
  52 #
  53 # Same things for in6addr_loopback and mktime - found in libc. For these two we
  54 # only get link-time error, luckily.
  55 #
  56 # These apply to USER_CFLAGS to.
  57
  58 CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\"    \
  59         $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap      \
  60         -Din6addr_loopback=kernel_in6addr_loopback
  61
  62 AFLAGS += $(ARCH_INCLUDE)
  63
  64 USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))
  65 USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
  66         $(MODE_INCLUDE) -D_FILE_OFFSET_BITS=64
  67
  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 CFLAGS.  Otherwise, it would cause ld to complain about the two different
  71 # errnos.
  72 # These apply to kernelspace only.
  73
  74 CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
  75         -Dmktime=kernel_mktime
  76 CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
  77
  78 include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
  79
  80 #This will adjust *FLAGS accordingly to the platform.
  81 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
  82
  83 # These are needed for clean and mrproper, since in that case .config is not
  84 # included; the values here are meaningless
  85
  86 CONFIG_NEST_LEVEL ?= 0
  87 CONFIG_KERNEL_HALF_GIGS ?= 0
  88
  89 SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
  90
  91 .PHONY: linux
  92
  93 all: linux
  94
  95 linux: vmlinux
  96         ln -f $< $@
  97
  98 define archhelp
  99   echo '* linux         - Binary kernel image (./linux) - for backward'
 100   echo '                   compatibility only, this creates a hard link to the'
 101   echo '                   real kernel binary, the the "vmlinux" binary you'
 102   echo '                   find in the kernel root.'
 103 endef
 104
 105 ifneq ($(KBUILD_SRC),)
 106 $(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch)
 107 else
 108 $(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch)
 109 endif
 110
 111 archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h
 112 prepare: $(ARCH_DIR)/include/kern_constants.h
 113
 114 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
 115 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
 116
 117 CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT
 118 CONFIG_KERNEL_STACK_ORDER ?= 2
 119 STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
 120
 121 ifndef START
 122   START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] )
 123 endif
 124
 125 CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \
 126         -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
 127         -DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y) \
 128         -DKERNEL_STACK_SIZE=$(STACK_SIZE) \
 129         -DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap_fin.o
 130
 131 #The wrappers will select whether using "malloc" or the kernel allocator.
 132 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
 133
 134 CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS)
 135 define cmd_vmlinux__
 136         $(CC) $(CFLAGS_vmlinux) -o $@ \
 137         -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
 138         -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
 139         -lutil \
 140         $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \
 141         FORCE ,$^) ; rm -f linux
 142 endef
 143
 144 #When cleaning we don't include .config, so we don't include
 145 #TT or skas makefiles and don't clean skas_ptregs.h.
 146 CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
 147         $(ARCH_DIR)/include/user_constants.h \
 148         $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch
 149
 150 MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \
 151         $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os
 152
 153 archclean:
 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         $(Q)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 $(objtree)/$(ARCH_DIR)/include:
 176         @echo '  MKDIR $@'
 177         $(Q)mkdir -p $@
 178
 179 $(ARCH_DIR)/include/sysdep: $(objtree)/$(ARCH_DIR)/include
 180         @echo '  SYMLINK $@'
 181 ifneq ($(KBUILD_SRC),)
 182         $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep
 183 else
 184         $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
 185 endif
 186
 187 $(ARCH_DIR)/os:
 188         @echo '  SYMLINK $@'
 189 ifneq ($(KBUILD_SRC),)
 190         $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os
 191 else
 192         $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os
 193 endif
 194
 195 # Generated files
 196 define filechk_umlconfig
 197         sed 's/ CONFIG/ UML_CONFIG/'
 198 endef
 199
 200 $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
 201         $(call filechk,umlconfig)
 202
 203 $(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c
 204         $(CC) $(USER_CFLAGS) -S -o $@ $<
 205
 206 define filechk_gen-asm-offsets
 207         (set -e; \
 208          echo "/*"; \
 209          echo " * DO NOT MODIFY."; \
 210          echo " *"; \
 211          echo " * This file was generated by arch/$(ARCH)/Makefile"; \
 212          echo " *"; \
 213          echo " */"; \
 214          echo ""; \
 215          sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
 216          echo ""; )
 217 endef
 218
 219 $(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/user-offsets.s
 220         $(call filechk,gen-asm-offsets)
 221
 222 CLEAN_FILES += $(ARCH_DIR)/user-offsets.s
 223
 224 $(ARCH_DIR)/include/kern_constants.h: $(objtree)/$(ARCH_DIR)/include
 225         @echo '  SYMLINK $@'
 226         $(Q) ln -sf ../../../include/asm-um/asm-offsets.h $@
 227
 228 export SUBARCH USER_CFLAGS OS