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
   9 # Recalculate MODLIB to reflect the EXTRAVERSION changes (via KERNELRELEASE)
  10 # The way the toplevel Makefile is written EXTRAVERSION is not supposed
  11 # to be changed outside the toplevel Makefile, but recalculating MODLIB is
  12 # a sufficient workaround until we no longer need architecture dependent
  13 # EXTRAVERSION...
  14 MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  15
  16 ifeq ($(CONFIG_DEBUGSYM),y)
  17 CFLAGS := $(subst -fomit-frame-pointer,,$(CFLAGS))
  18 endif
  19
  20 CFLAGS-$(CONFIG_DEBUGSYM) += -g
  21
  22 core-y                  += $(ARCH_DIR)/kernel/           \
  23                            $(ARCH_DIR)/drivers/          \
  24                            $(ARCH_DIR)/sys-$(SUBARCH)/
  25
  26 # Have to precede the include because the included Makefiles reference them.
  27 SYMLINK_HEADERS = include/asm-um/archparam.h include/asm-um/system.h \
  28         include/asm-um/sigcontext.h include/asm-um/processor.h \
  29         include/asm-um/ptrace.h include/asm-um/arch-signal.h
  30
  31 ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os \
  32         $(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h
  33
  34 GEN_HEADERS += $(ARCH_DIR)/include/task.h $(ARCH_DIR)/include/kern_constants.h
  35
  36 include $(ARCH_DIR)/Makefile-$(SUBARCH)
  37 include $(ARCH_DIR)/Makefile-os-$(OS)
  38
  39 MAKEFILE-$(CONFIG_MODE_TT) += Makefile-tt
  40 MAKEFILE-$(CONFIG_MODE_SKAS) += Makefile-skas
  41
  42 ifneq ($(MAKEFILE-y),)
  43   include $(addprefix $(ARCH_DIR)/,$(MAKEFILE-y))
  44 endif
  45
  46 EXTRAVERSION := $(EXTRAVERSION)-1um
  47
  48 ARCH_INCLUDE = -I$(ARCH_DIR)/include
  49
  50 # -Derrno=kernel_errno - This turns all kernel references to errno into
  51 # kernel_errno to separate them from the libc errno.  This allows -fno-common
  52 # in CFLAGS.  Otherwise, it would cause ld to complain about the two different
  53 # errnos.
  54
  55 CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
  56         -D_LARGEFILE64_SOURCE $(ARCH_INCLUDE) -Derrno=kernel_errno \
  57         $(MODE_INCLUDE)
  58
  59 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
  60
  61 SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
  62
  63 ifeq ($(CONFIG_MODE_SKAS), y)
  64 $(SYS_HEADERS) : $(ARCH_DIR)/kernel/skas/include/skas_ptregs.h
  65 endif
  66
  67 include/linux/version.h: arch/$(ARCH)/Makefile
  68
  69 $(ARCH_DIR)/vmlinux.lds.S :
  70         touch $@
  71
  72 prepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS)
  73
  74 LDFLAGS_vmlinux = -r
  75
  76 vmlinux: $(ARCH_DIR)/main.o
  77
  78 # These aren't in Makefile-tt because they are needed in the !CONFIG_MODE_TT +
  79 # CONFIG_MODE_SKAS + CONFIG_STATIC_LINK case.
  80
  81 LINK_TT = -static
  82 LD_SCRIPT_TT := uml.lds.s
  83
  84 ifeq ($(CONFIG_STATIC_LINK),y)
  85   LINK-y += $(LINK_TT)
  86   LD_SCRIPT-y := $(LD_SCRIPT_TT)
  87 else
  88 ifeq ($(CONFIG_MODE_TT),y)
  89   LINK-y += $(LINK_TT)
  90   LD_SCRIPT-y := $(LD_SCRIPT_TT)
  91 else
  92 ifeq ($(CONFIG_MODE_SKAS),y)
  93   LINK-y += $(LINK_SKAS)
  94   LD_SCRIPT-y := $(LD_SCRIPT_SKAS)
  95 endif
  96 endif
  97 endif
  98
  99 CPP_MODE_TT := $(shell [ "$(CONFIG_MODE_TT)" = "y" ] && echo -DMODE_TT)
 100 CONFIG_KERNEL_STACK_ORDER ?= 2
 101 STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
 102
 103 AFLAGS_vmlinux.lds.o = -U$(SUBARCH) \
 104         -DSTART=$$(($(TOP_ADDR) - $(SIZE))) -DELF_ARCH=$(ELF_ARCH) \
 105         -DELF_FORMAT=\"$(ELF_FORMAT)\" $(CPP_MODE_TT) \
 106         -DKERNEL_STACK_SIZE=$(STACK_SIZE)
 107
 108 AFLAGS_$(LD_SCRIPT-y:.s=).o = $(AFLAGS_vmlinux.lds.o) -P -C -Uum
 109
 110 LD_SCRIPT-y := $(ARCH_DIR)/$(LD_SCRIPT-y)
 111
 112 $(LD_SCRIPT-y) : $(LD_SCRIPT-y:.s=.S) scripts FORCE
 113         $(call if_changed_dep,as_s_S)
 114
 115 linux: vmlinux $(LD_SCRIPT-y)
 116         $(CC) -Wl,-T,$(LD_SCRIPT-y) $(LINK-y) $(LINK_WRAPS) \
 117                 -o linux $(ARCH_DIR)/main.o vmlinux -L/usr/lib -lutil
 118
 119 USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))
 120 USER_CFLAGS := $(patsubst -Derrno=kernel_errno,,$(USER_CFLAGS))
 121 USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
 122         $(MODE_INCLUDE)
 123
 124 # To get a definition of F_SETSIG
 125 USER_CFLAGS += -D_GNU_SOURCE
 126
 127 CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/uml.lds.s \
 128         $(ARCH_DIR)/dyn_link.ld.s $(GEN_HEADERS)
 129
 130 $(ARCH_DIR)/main.o: $(ARCH_DIR)/main.c
 131         $(CC) $(USER_CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
 132
 133 archmrproper:
 134         for d in $(ARCH_SUBDIRS) $(ARCH_DIR)/util; \
 135         do \
 136                 $(MAKE) -C $$d archmrproper; \
 137         done
 138         rm -f $(CLEAN_FILES) $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) include/asm \
 139                 $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS))
 140
 141 archclean: sysclean
 142         for d in $(ARCH_SUBDIRS) $(ARCH_DIR)/util; \
 143         do \
 144                 $(MAKE) -C $$d clean; \
 145         done
 146         find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
 147                 -o -name '*.gcov' \) -type f -print | xargs rm -f
 148         rm -f linux x.i gmon.out $(ARCH_DIR)/link.ld $(GEN_HEADERS)
 149
 150 archdep:
 151         for d in $(ARCH_SUBDIRS); do $(MAKE) -C $$d fastdep; done
 152
 153 $(SYMLINK_HEADERS):
 154         cd $(TOPDIR)/$(dir $@) ; \
 155         ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@)
 156
 157 include/asm-um/arch:
 158         cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch
 159
 160 $(ARCH_DIR)/include/sysdep:
 161         cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
 162
 163 $(ARCH_DIR)/os:
 164         cd $(ARCH_DIR) && ln -sf os-$(OS) os
 165
 166 $(ARCH_DIR)/include/uml-config.h :
 167         sed 's/ CONFIG/ UML_CONFIG/' $(TOPDIR)/include/linux/autoconf.h > $@
 168
 169 $(ARCH_DIR)/include/task.h : $(ARCH_DIR)/util/mk_task
 170         $< > $@
 171
 172 $(ARCH_DIR)/include/kern_constants.h : $(ARCH_DIR)/util/mk_constants
 173         $< > $@
 174
 175 $(ARCH_DIR)/util/mk_task : $(ARCH_DIR)/kernel/skas/include/skas_ptregs.h \
 176         $(ARCH_DIR)/util FORCE ;
 177
 178 $(ARCH_DIR)/util: FORCE
 179         @$(call descend,$@,)
 180
 181 export SUBARCH USER_CFLAGS OS