LXR linux/arch/um/Makefile

   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 Jeff Dike (jdike@karaya.com)
   6# Licensed under the GPL
   7#
   8
   9ARCH_DIR := arch/um
  10OS := $(shell uname -s)
  11# We require bash because the vmlinux link and loader script cpp use bash
  12# features.
  13SHELL := /bin/bash
  14
  15filechk_gen_header = $<
  16
  17core-y                  += $(ARCH_DIR)/kernel/          \
  18                           $(ARCH_DIR)/drivers/         \
  19                           $(ARCH_DIR)/os-$(OS)/
  20
  21# Have to precede the include because the included Makefiles reference them.
  22SYMLINK_HEADERS := archparam.h system.h sigcontext.h processor.h ptrace.h \
  23        module.h vm-flags.h elf.h host_ldt.h
  24SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header))
  25
  26# XXX: The "os" symlink is only used by arch/um/include/os.h, which includes
  27# ../os/include/file.h
  28#
  29# These are cleaned up during mrproper. Please DO NOT fix it again, this is
  30# the Correct Thing(tm) to do!
  31ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os \
  32        $(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h
  33
  34um-modes-$(CONFIG_MODE_TT) += tt
  35um-modes-$(CONFIG_MODE_SKAS) += skas
  36
  37MODE_INCLUDE    += $(foreach mode,$(um-modes-y),\
  38                   -I$(srctree)/$(ARCH_DIR)/include/$(mode))
  39
  40MAKEFILES-INCL  += $(foreach mode,$(um-modes-y),\
  41                   $(srctree)/$(ARCH_DIR)/Makefile-$(mode))
  42
  43ifneq ($(MAKEFILES-INCL),)
  44  include $(MAKEFILES-INCL)
  45endif
  46
  47ARCH_INCLUDE    := -I$(ARCH_DIR)/include
  48ifneq ($(KBUILD_SRC),)
  49ARCH_INCLUDE    += -I$(srctree)/$(ARCH_DIR)/include
  50endif
  51SYS_DIR         := $(ARCH_DIR)/include/sysdep-$(SUBARCH)
  52
  53# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
  54# named - it's a common symbol in libpcap, so we get a binary which crashes.
  55#
  56# Same things for in6addr_loopback and mktime - found in libc. For these two we
  57# only get link-time error, luckily.
  58#
  59# These apply to USER_CFLAGS to.
  60
  61CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\"    \
  62        $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap      \
  63        -Din6addr_loopback=kernel_in6addr_loopback
  64
  65AFLAGS += $(ARCH_INCLUDE)
  66
  67USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
  68        $(patsubst -I%,,$(CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
  69        -D_FILE_OFFSET_BITS=64
  70
  71include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
  72
  73#This will adjust *FLAGS accordingly to the platform.
  74include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
  75
  76# -Derrno=kernel_errno - This turns all kernel references to errno into
  77# kernel_errno to separate them from the libc errno.  This allows -fno-common
  78# in CFLAGS.  Otherwise, it would cause ld to complain about the two different
  79# errnos.
  80# These apply to kernelspace only.
  81
  82KERNEL_DEFINES = -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
  83        -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)
  84CFLAGS += $(KERNEL_DEFINES)
  85CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
  86
  87# These are needed for clean and mrproper, since in that case .config is not
  88# included; the values here are meaningless
  89
  90CONFIG_NEST_LEVEL ?= 0
  91CONFIG_KERNEL_HALF_GIGS ?= 0
  92
  93SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
  94
  95PHONY += linux
  96
  97all: linux
  98
  99linux: vmlinux
 100        @echo '  LINK $@'
 101        $(Q)ln -f $< $@
 102
 103define archhelp
 104  echo '* linux         - Binary kernel image (./linux) - for backward'
 105  echo '                   compatibility only, this creates a hard link to the'
 106  echo '                   real kernel binary, the "vmlinux" binary you'
 107  echo '                   find in the kernel root.'
 108endef
 109
 110ifneq ($(KBUILD_SRC),)
 111$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch)
 112else
 113$(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch)
 114endif
 115
 116archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h
 117prepare: $(ARCH_DIR)/include/kern_constants.h
 118
 119LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
 120LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
 121
 122CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
 123        $(call cc-option, -fno-stack-protector,) \
 124        $(call cc-option, -fno-stack-protector-all,)
 125
 126CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT
 127CONFIG_KERNEL_STACK_ORDER ?= 2
 128STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
 129
 130ifndef START
 131  START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] )
 132endif
 133
 134CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \
 135        -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
 136        -DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y) \
 137        -DKERNEL_STACK_SIZE=$(STACK_SIZE) \
 138        -DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap.o
 139
 140#The wrappers will select whether using "malloc" or the kernel allocator.
 141LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
 142
 143CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS)
 144define cmd_vmlinux__
 145        $(CC) $(CFLAGS_vmlinux) -o $@ \
 146        -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
 147        -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
 148        -lutil \
 149        $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \
 150        FORCE ,$^) ; rm -f linux
 151endef
 152
 153#When cleaning we don't include .config, so we don't include
 154#TT or skas makefiles and don't clean skas_ptregs.h.
 155CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
 156        $(ARCH_DIR)/include/user_constants.h \
 157        $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch
 158
 159MRPROPER_FILES += $(ARCH_SYMLINKS)
 160
 161archclean:
 162        @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
 163                -o -name '*.gcov' \) -type f -print | xargs rm -f
 164
 165$(SYMLINK_HEADERS):
 166        @echo '  SYMLINK $@'
 167ifneq ($(KBUILD_SRC),)
 168        $(Q)mkdir -p $(objtree)/include/asm-um
 169        $(Q)ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@
 170else
 171        $(Q)cd $(TOPDIR)/$(dir $@) ; \
 172        ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@)
 173endif
 174
 175include/asm-um/arch:
 176        @echo '  SYMLINK $@'
 177ifneq ($(KBUILD_SRC),)
 178        $(Q)mkdir -p $(objtree)/include/asm-um
 179        $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch
 180else
 181        $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch
 182endif
 183
 184$(objtree)/$(ARCH_DIR)/include:
 185        @echo '  MKDIR $@'
 186        $(Q)mkdir -p $@
 187
 188$(ARCH_DIR)/include/sysdep: $(objtree)/$(ARCH_DIR)/include
 189        @echo '  SYMLINK $@'
 190ifneq ($(KBUILD_SRC),)
 191        $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep
 192else
 193        $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
 194endif
 195
 196$(ARCH_DIR)/os:
 197        @echo '  SYMLINK $@'
 198ifneq ($(KBUILD_SRC),)
 199        $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os
 200else
 201        $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os
 202endif
 203
 204# Generated files
 205define filechk_umlconfig
 206        sed 's/ CONFIG/ UML_CONFIG/'
 207endef
 208
 209$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
 210        $(call filechk,umlconfig)
 211
 212$(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE
 213        $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@
 214
 215define filechk_gen-asm-offsets
 216        (set -e; \
 217         echo "/*"; \
 218         echo " * DO NOT MODIFY."; \
 219         echo " *"; \
 220         echo " * This file was generated by arch/$(ARCH)/Makefile"; \
 221         echo " *"; \
 222         echo " */"; \
 223         echo ""; \
 224         sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
 225         echo ""; )
 226endef
 227
 228$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s
 229        $(call filechk,gen-asm-offsets)
 230
 231$(ARCH_DIR)/include/kern_constants.h: $(objtree)/$(ARCH_DIR)/include
 232        @echo '  SYMLINK $@'
 233        $(Q)ln -sf ../../../include/asm-um/asm-offsets.h $@
 234
 235export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS
 236