fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / arch / um / Makefile
blob82c2ac48040da2cddf7c645fca724796a16668ad
2 # This file is included by the global makefile so that you can add your own
3 # architecture-specific flags and dependencies.
5 # Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
6 # Licensed under the GPL
9 ARCH_DIR := arch/um
10 OS := $(shell uname -s)
11 # We require bash because the vmlinux link and loader script cpp use bash
12 # features.
13 SHELL := /bin/bash
15 filechk_gen_header = $<
17 core-y += $(ARCH_DIR)/kernel/ \
18 $(ARCH_DIR)/drivers/ \
19 $(ARCH_DIR)/os-$(OS)/
21 # Have to precede the include because the included Makefiles reference them.
22 SYMLINK_HEADERS := archparam.h system.h sigcontext.h processor.h ptrace.h \
23 module.h vm-flags.h elf.h host_ldt.h
24 SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header))
26 # XXX: The "os" symlink is only used by arch/um/include/os.h, which includes
27 # ../os/include/file.h
29 # These are cleaned up during mrproper. Please DO NOT fix it again, this is
30 # the Correct Thing(tm) to do!
31 ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os \
32 $(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h
34 MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/skas
36 include $(srctree)/$(ARCH_DIR)/Makefile-skas
38 ARCH_INCLUDE := -I$(ARCH_DIR)/include
39 ifneq ($(KBUILD_SRC),)
40 ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include
41 endif
42 SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH)
44 # -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
45 # named - it's a common symbol in libpcap, so we get a binary which crashes.
47 # Same things for in6addr_loopback and mktime - found in libc. For these two we
48 # only get link-time error, luckily.
50 # These apply to USER_CFLAGS to.
52 KBUILD_CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
53 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
54 -Din6addr_loopback=kernel_in6addr_loopback \
55 -Din6addr_any=kernel_in6addr_any
57 KBUILD_AFLAGS += $(ARCH_INCLUDE)
59 USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
60 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
61 -D_FILE_OFFSET_BITS=64
63 include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
65 #This will adjust *FLAGS accordingly to the platform.
66 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
68 # -Derrno=kernel_errno - This turns all kernel references to errno into
69 # kernel_errno to separate them from the libc errno. This allows -fno-common
70 # in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
71 # errnos.
72 # These apply to kernelspace only.
74 KERNEL_DEFINES = -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
75 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)
76 KBUILD_CFLAGS += $(KERNEL_DEFINES)
77 KBUILD_CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
79 # These are needed for clean and mrproper, since in that case .config is not
80 # included; the values here are meaningless
82 CONFIG_NEST_LEVEL ?= 0
84 SIZE = ($(CONFIG_NEST_LEVEL) * 0x20000000)
86 PHONY += linux
88 all: linux
90 linux: vmlinux
91 @echo ' LINK $@'
92 $(Q)ln -f $< $@
94 define archhelp
95 echo '* linux - Binary kernel image (./linux) - for backward'
96 echo ' compatibility only, this creates a hard link to the'
97 echo ' real kernel binary, the "vmlinux" binary you'
98 echo ' find in the kernel root.'
99 endef
101 ifneq ($(KBUILD_SRC),)
102 $(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch)
103 else
104 $(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch)
105 endif
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 CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
114 $(call cc-option, -fno-stack-protector,) \
115 $(call cc-option, -fno-stack-protector-all,)
117 CONFIG_KERNEL_STACK_ORDER ?= 2
118 STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
120 ifndef START
121 START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] )
122 endif
124 CPPFLAGS_vmlinux.lds = -U$(SUBARCH) -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
125 -DELF_FORMAT="$(ELF_FORMAT)" -DKERNEL_STACK_SIZE=$(STACK_SIZE)
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)
131 define cmd_vmlinux__
132 $(CC) $(CFLAGS_vmlinux) -o $@ \
133 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
134 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
135 -lutil \
136 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \
137 FORCE ,$^) ; rm -f linux
138 endef
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 += $(ARCH_SYMLINKS)
148 archclean:
149 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
150 -o -name '*.gcov' \) -type f -print | xargs rm -f
152 $(SYMLINK_HEADERS):
153 @echo ' SYMLINK $@'
154 ifneq ($(KBUILD_SRC),)
155 $(Q)mkdir -p $(objtree)/include/asm-um
156 $(Q)ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@
157 else
158 $(Q)cd $(TOPDIR)/$(dir $@) ; \
159 ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@)
160 endif
162 include/asm-um/arch:
163 @echo ' SYMLINK $@'
164 ifneq ($(KBUILD_SRC),)
165 $(Q)mkdir -p $(objtree)/include/asm-um
166 $(Q)ln -fsn $(srctree)/include/asm-$(HEADER_ARCH) include/asm-um/arch
167 else
168 $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(HEADER_ARCH) arch
169 endif
171 $(objtree)/$(ARCH_DIR)/include:
172 @echo ' MKDIR $@'
173 $(Q)mkdir -p $@
175 $(ARCH_DIR)/include/sysdep: $(objtree)/$(ARCH_DIR)/include
176 @echo ' SYMLINK $@'
177 ifneq ($(KBUILD_SRC),)
178 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep
179 else
180 $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
181 endif
183 $(ARCH_DIR)/os:
184 @echo ' SYMLINK $@'
185 ifneq ($(KBUILD_SRC),)
186 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os
187 else
188 $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os
189 endif
191 # Generated files
192 define filechk_umlconfig
193 sed 's/ CONFIG/ UML_CONFIG/'
194 endef
196 $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
197 $(call filechk,umlconfig)
199 $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE
200 $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@
202 define filechk_gen-asm-offsets
203 (set -e; \
204 echo "/*"; \
205 echo " * DO NOT MODIFY."; \
206 echo " *"; \
207 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
208 echo " *"; \
209 echo " */"; \
210 echo ""; \
211 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
212 echo ""; )
213 endef
215 $(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s
216 $(call filechk,gen-asm-offsets)
218 $(ARCH_DIR)/include/kern_constants.h: $(objtree)/$(ARCH_DIR)/include
219 @echo ' SYMLINK $@'
220 $(Q)ln -sf ../../../include/asm-um/asm-offsets.h $@
222 export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH