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 ldt.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) \
63 $(MODE_INCLUDE) -D_FILE_OFFSET_BITS=64
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 -Dmktime=kernel_mktime
72 CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
74 include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
76 #This will adjust *FLAGS accordingly to the platform.
77 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
79 # These are needed for clean and mrproper, since in that case .config is not
80 # included; the values here are meaningless
82 CONFIG_NEST_LEVEL ?= 0
83 CONFIG_KERNEL_HALF_GIGS ?= 0
85 SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
95 echo '* linux - Binary kernel image (./linux) - for backward'
96 echo ' compatibility only, this creates a hard link to the'
97 echo ' real kernel binary, the the "vmlinux" binary you'
98 echo ' find in the kernel root.'
101 ifneq ($(KBUILD_SRC),)
102 $(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch)
104 $(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch)
107 archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h
108 prepare: $(ARCH_DIR)/include/kern_constants.h
110 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
111 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
113 CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT
114 CONFIG_KERNEL_STACK_ORDER ?= 2
115 STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
118 START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] )
121 CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \
122 -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
123 -DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y) \
124 -DKERNEL_STACK_SIZE=$(STACK_SIZE) \
125 -DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap_fin.o
127 #The wrappers will select whether using "malloc" or the kernel allocator.
128 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
130 CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS)
132 $(CC) $(CFLAGS_vmlinux) -o $@ \
133 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
134 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
136 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \
137 FORCE ,$^) ; rm -f linux
140 #When cleaning we don't include .config, so we don't include
141 #TT or skas makefiles and don't clean skas_ptregs.h.
142 CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
143 $(ARCH_DIR)/include/user_constants.h \
144 $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch
146 MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \
147 $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os
150 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
151 -o -name '*.gcov' \) -type f -print | xargs rm -f
155 ifneq ($(KBUILD_SRC),)
156 $(Q)ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@
158 $(Q)cd $(TOPDIR)/$(dir $@) ; \
159 ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@)
164 ifneq ($(KBUILD_SRC),)
165 $(Q)mkdir -p include/asm-um
166 $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch
168 $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch
171 $(ARCH_DIR)/include/sysdep:
173 ifneq ($(KBUILD_SRC),)
174 $(Q)mkdir -p $(ARCH_DIR)/include
175 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep
177 $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
182 ifneq ($(KBUILD_SRC),)
183 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os
185 $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os
189 define filechk_umlconfig
190 sed 's/ CONFIG/ UML_CONFIG/'
193 $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
194 $(call filechk,umlconfig)
196 $(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c
197 $(CC) $(USER_CFLAGS) -S -o $@ $<
199 define filechk_gen-asm-offsets
202 echo " * DO NOT MODIFY."; \
204 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
208 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
212 $(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/user-offsets.s
213 $(call filechk,gen-asm-offsets)
215 CLEAN_FILES += $(ARCH_DIR)/user-offsets.s
217 $(ARCH_DIR)/include/kern_constants.h:
219 $(Q) ln -sf ../../../include/asm-um/asm-offsets.h $@
221 export SUBARCH USER_CFLAGS OS