2 # Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 # Licensed under the GPL
7 OS := $(shell uname -s)
8 # We require bash because the vmlinux link and loader script cpp use bash
12 filechk_gen_header = $<
14 core-y += $(ARCH_DIR)/kernel/ \
15 $(ARCH_DIR)/drivers/ \
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))
23 # XXX: The "os" symlink is only used by arch/um/include/os.h, which includes
24 # ../os/include/file.h
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) $(ARCH_DIR)/include/uml-config.h
31 um-modes-$(CONFIG_MODE_TT) += tt
32 um-modes-$(CONFIG_MODE_SKAS) += skas
34 MODE_INCLUDE += $(foreach mode,$(um-modes-y),\
35 -I$(srctree)/$(ARCH_DIR)/kernel/$(mode)/include)
37 MAKEFILES-INCL += $(foreach mode,$(um-modes-y),\
38 $(srctree)/$(ARCH_DIR)/Makefile-$(mode))
40 ifneq ($(MAKEFILES-INCL),)
41 include $(MAKEFILES-INCL)
44 ARCH_INCLUDE := -I$(ARCH_DIR)/include
45 ifneq ($(KBUILD_SRC),)
46 ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include
48 SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH)
50 # -Dvmap=kernel_vmap affects everything, and prevents anything from
51 # referencing the libpcap.o symbol so named.
53 # Same things for in6addr_loopback - found in libc.
55 CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
56 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
57 -Din6addr_loopback=kernel_in6addr_loopback
59 AFLAGS += $(ARCH_INCLUDE)
61 USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))
62 USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
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
70 CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask
71 CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
73 include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
75 #This will adjust *FLAGS accordingly to the platform.
76 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
78 # These are needed for clean and mrproper, since in that case .config is not
79 # included; the values here are meaningless
81 CONFIG_NEST_LEVEL ?= 0
82 CONFIG_KERNEL_HALF_GIGS ?= 0
84 SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
94 echo '* linux - Binary kernel image (./linux) - for backward'
95 echo ' compatibility only, this creates a hard link to the'
96 echo ' real kernel binary, the the "vmlinux" binary you'
97 echo ' find in the kernel root.'
100 ifneq ($(KBUILD_SRC),)
101 $(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch)
103 $(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch)
106 archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h
107 prepare: $(ARCH_DIR)/include/kern_constants.h
109 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
110 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
112 CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT
113 CONFIG_KERNEL_STACK_ORDER ?= 2
114 STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
117 START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] )
120 CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \
121 -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
122 -DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y) \
123 -DKERNEL_STACK_SIZE=$(STACK_SIZE) \
124 -DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap_fin.o
126 #The wrappers will select whether using "malloc" or the kernel allocator.
127 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
129 CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS)
131 $(CC) $(CFLAGS_vmlinux) -o $@ \
132 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
133 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
135 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \
136 FORCE ,$^) ; rm -f linux
139 #When cleaning we don't include .config, so we don't include
140 #TT or skas makefiles and don't clean skas_ptregs.h.
141 CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
142 $(ARCH_DIR)/include/user_constants.h \
143 $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch
145 MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \
146 $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os
149 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
150 -o -name '*.gcov' \) -type f -print | xargs rm -f
154 ifneq ($(KBUILD_SRC),)
155 ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@
157 $(Q)cd $(TOPDIR)/$(dir $@) ; \
158 ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@)
163 ifneq ($(KBUILD_SRC),)
164 $(Q)mkdir -p include/asm-um
165 $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch
167 $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch
170 $(ARCH_DIR)/include/sysdep:
172 ifneq ($(KBUILD_SRC),)
173 $(Q)mkdir -p $(ARCH_DIR)/include
174 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep
176 $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
181 ifneq ($(KBUILD_SRC),)
182 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os
184 $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os
188 define filechk_umlconfig
189 sed 's/ CONFIG/ UML_CONFIG/'
192 define filechk_gen-asm-offsets
195 echo " * DO NOT MODIFY."; \
197 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
201 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
205 $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
206 $(call filechk,umlconfig)
208 $(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c
209 $(CC) $(USER_CFLAGS) -S -o $@ $<
211 $(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/user-offsets.s
212 $(call filechk,gen-asm-offsets)
214 CLEAN_FILES += $(ARCH_DIR)/user-offsets.s
216 $(ARCH_DIR)/kernel-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/kernel-offsets.c \
218 $(CC) $(CFLAGS) $(NOSTDINC_FLAGS) $(CPPFLAGS) -S -o $@ $<
220 $(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/kernel-offsets.s
221 $(call filechk,gen-asm-offsets)
223 CLEAN_FILES += $(ARCH_DIR)/kernel-offsets.s
225 export SUBARCH USER_CFLAGS OS