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         arch-signal.h module.h vm-flags.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 SYS_DIR         := $(ARCH_DIR)/include/sysdep-$(SUBARCH)
  48
  49 include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
  50
  51 core-y += $(SUBARCH_CORE)
  52 libs-y += $(SUBARCH_LIBS)
  53
  54 # -Derrno=kernel_errno - This turns all kernel references to errno into
  55 # kernel_errno to separate them from the libc errno.  This allows -fno-common
  56 # in CFLAGS.  Otherwise, it would cause ld to complain about the two different
  57 # errnos.
  58
  59 CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
  60         $(ARCH_INCLUDE) $(MODE_INCLUDE)
  61
  62 USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))
  63 USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
  64         $(MODE_INCLUDE) $(ARCH_USER_CFLAGS)
  65 CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask
  66 CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
  67
  68 #This will adjust *FLAGS accordingly to the platform.
  69 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
  70
  71 # These are needed for clean and mrproper, since in that case .config is not
  72 # included; the values here are meaningless
  73
  74 CONFIG_NEST_LEVEL ?= 0
  75 CONFIG_KERNEL_HALF_GIGS ?= 0
  76
  77 SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
  78
  79 ifeq ($(CONFIG_MODE_SKAS), y)
  80 $(SYS_HEADERS) : $(ARCH_DIR)/include/skas_ptregs.h
  81 endif
  82
  83 .PHONY: linux
  84
  85 all: linux
  86
  87 linux: vmlinux
  88         ln -f $< $@
  89
  90 define archhelp
  91   echo '* linux         - Binary kernel image (./linux) - for backward'
  92   echo '                   compatibility only, this creates a hard link to the'
  93   echo '                   real kernel binary, the the "vmlinux" binary you'
  94   echo '                   find in the kernel root.'
  95 endef
  96
  97 $(shell cd $(ARCH_DIR) && ln -sf Kconfig_$(SUBARCH) Kconfig_arch)
  98
  99 prepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS) \
 100         $(ARCH_DIR)/kernel/vmlinux.lds.S
 101
 102 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
 103 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
 104
 105 LD_SCRIPT-$(CONFIG_LD_SCRIPT_STATIC) := uml.lds.S
 106 LD_SCRIPT-$(CONFIG_LD_SCRIPT_DYN) := dyn.lds.S
 107
 108 CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT
 109 CONFIG_KERNEL_STACK_ORDER ?= 2
 110 STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
 111
 112 ifndef START
 113   START = $$(($(TOP_ADDR) - $(SIZE)))
 114 endif
 115
 116 CPPFLAGS_vmlinux.lds = $(shell echo -U$(SUBARCH) \
 117         -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
 118         -DELF_FORMAT=\"$(ELF_FORMAT)\" $(CPP_MODE-y) \
 119         -DKERNEL_STACK_SIZE=$(STACK_SIZE))
 120
 121 #The wrappers will select whether using "malloc" or the kernel allocator.
 122 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
 123
 124 CFLAGS_vmlinux = $(LINK-y) $(LINK_WRAPS)
 125 define cmd_vmlinux__
 126         $(CC) $(CFLAGS_vmlinux) -o $@ \
 127         -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
 128         -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
 129         -L/usr/lib -lutil \
 130         $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \
 131         FORCE ,$^) ; rm -f linux
 132 endef
 133
 134 #When cleaning we don't include .config, so we don't include
 135 #TT or skas makefiles and don't clean skas_ptregs.h.
 136 CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
 137         $(GEN_HEADERS) $(ARCH_DIR)/include/skas_ptregs.h
 138
 139 MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \
 140         $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os \
 141         $(ARCH_DIR)/Kconfig_arch
 142
 143 archclean:
 144         $(Q)$(MAKE) $(clean)=$(ARCH_DIR)/util
 145         @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
 146                 -o -name '*.gcov' \) -type f -print | xargs rm -f
 147
 148 #We need to re-preprocess this when the symlink dest changes.
 149 #So we touch it when needed.
 150 $(ARCH_DIR)/kernel/vmlinux.lds.S: FORCE
 151         $(Q)if [ "$(shell readlink $@)" != "$(LD_SCRIPT-y)" ]; then \
 152                 echo '  SYMLINK $@'; \
 153                 ln -sf $(LD_SCRIPT-y) $@; \
 154                 touch $@; \
 155         fi;
 156
 157 $(SYMLINK_HEADERS):
 158         @echo '  SYMLINK $@'
 159         $(Q)cd $(TOPDIR)/$(dir $@) ; \
 160         ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@)
 161
 162 include/asm-um/arch:
 163         @echo '  SYMLINK $@'
 164         $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch
 165
 166 $(ARCH_DIR)/include/sysdep:
 167         @echo '  SYMLINK $@'
 168         $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
 169
 170 $(ARCH_DIR)/os:
 171         @echo '  SYMLINK $@'
 172         $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os
 173
 174 # Generated files
 175 define filechk_umlconfig
 176         sed 's/ CONFIG/ UML_CONFIG/'
 177 endef
 178
 179 $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
 180         $(call filechk,umlconfig)
 181
 182 $(ARCH_DIR)/include/task.h: $(ARCH_DIR)/util/mk_task
 183         $(call filechk,gen_header)
 184
 185 $(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/os/util/mk_user_constants
 186         $(call filechk,gen_header)
 187
 188 $(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/util/mk_constants
 189         $(call filechk,gen_header)
 190
 191 $(ARCH_DIR)/include/skas_ptregs.h: $(ARCH_DIR)/kernel/skas/util/mk_ptregs
 192         $(call filechk,gen_header)
 193
 194 $(ARCH_DIR)/os/util/mk_user_constants: $(ARCH_DIR)/os/util FORCE ;
 195
 196 $(ARCH_DIR)/util/mk_task $(ARCH_DIR)/util/mk_constants: $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/util \
 197         FORCE ;
 198
 199 $(ARCH_DIR)/kernel/skas/util/mk_ptregs: $(ARCH_DIR)/kernel/skas/util FORCE ;
 200
 201 $(ARCH_DIR)/util: scripts_basic $(SYS_DIR)/sc.h FORCE
 202         $(Q)$(MAKE) $(build)=$@
 203
 204 $(ARCH_DIR)/kernel/skas/util: scripts_basic FORCE
 205         $(Q)$(MAKE) $(build)=$@
 206
 207 $(ARCH_DIR)/os/util: scripts_basic FORCE
 208         $(Q)$(MAKE) $(build)=$@
 209
 210 export SUBARCH USER_CFLAGS OS