1# 2# This file is included by the global makefile so that you can add your own 3# architecture-specific flags and dependencies. 4# 5# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 6# Licensed under the GPL 7# 8 9ARCH_DIR := arch/um 10OS := $(shell uname -s) 11# We require bash because the vmlinux link and loader script cpp use bash 12# features. 13SHELL := /bin/bash 14 15filechk_gen_header = $< 16 17core-y += $(ARCH_DIR)/kernel/ \ 18 $(ARCH_DIR)/drivers/ \ 19 $(ARCH_DIR)/os-$(OS)/ 20 21# Have to precede the include because the included Makefiles reference them. 22SYMLINK_HEADERS := archparam.h system.h sigcontext.h processor.h ptrace.h \ 23 module.h vm-flags.h elf.h host_ldt.h 24SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header)) 25 26# XXX: The "os" symlink is only used by arch/um/include/os.h, which includes 27# ../os/include/file.h 28# 29# These are cleaned up during mrproper. Please DO NOT fix it again, this is 30# the Correct Thing(tm) to do! 31ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os \ 32 $(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h 33 34MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/skas 35 36include $(srctree)/$(ARCH_DIR)/Makefile-skas 37 38ARCH_INCLUDE := -I$(ARCH_DIR)/include 39ifneq ($(KBUILD_SRC),) 40ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include 41endif 42SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH) 43 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. 46# 47# Same things for in6addr_loopback and mktime - found in libc. For these two we 48# only get link-time error, luckily. 49# 50# These apply to USER_CFLAGS to. 51 52KBUILD_CFLAGS += $(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 56 57KBUILD_AFLAGS += $(ARCH_INCLUDE) 58 59USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\ 60 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \ 61 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 62 63include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH) 64 65#This will adjust *FLAGS accordingly to the platform. 66include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) 67 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. 73# 74# strip leading and trailing whitespace to make the USER_CFLAGS removal of these 75# defines more robust 76 77KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ 78 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)) 79KBUILD_CFLAGS += $(KERNEL_DEFINES) 80KBUILD_CFLAGS += $(call cc-option,-fno-unit-at-a-time,) 81 82# These are needed for clean and mrproper, since in that case .config is not 83# included; the values here are meaningless 84 85CONFIG_NEST_LEVEL ?= 0 86 87SIZE = ($(CONFIG_NEST_LEVEL) * 0x20000000) 88 89PHONY += linux 90 91all: linux 92 93linux: vmlinux 94 @echo ' LINK $@' 95 $(Q)ln -f $< $@ 96 97define archhelp 98 echo '* linux - Binary kernel image (./linux) - for backward' 99 echo ' compatibility only, this creates a hard link to the' 100 echo ' real kernel binary, the "vmlinux" binary you' 101 echo ' find in the kernel root.' 102endef 103 104ifneq ($(KBUILD_SRC),) 105$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch) 106else 107$(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch) 108endif 109 110archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h 111prepare: $(ARCH_DIR)/include/kern_constants.h 112 113LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 114LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 115 116CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \ 117 $(call cc-option, -fno-stack-protector,) \ 118 $(call cc-option, -fno-stack-protector-all,) 119 120CONFIG_KERNEL_STACK_ORDER ?= 2 121STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] ) 122 123ifndef START 124 START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] ) 125endif 126 127CPPFLAGS_vmlinux.lds = -U$(SUBARCH) -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ 128 -DELF_FORMAT="$(ELF_FORMAT)" -DKERNEL_STACK_SIZE=$(STACK_SIZE) 129 130# The wrappers will select whether using "malloc" or the kernel allocator. 131LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc 132 133LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt)) 134 135CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE) 136define cmd_vmlinux__ 137 $(CC) $(CFLAGS_vmlinux) -o $@ \ 138 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \ 139 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \ 140 -lutil \ 141 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \ 142 FORCE ,$^) ; rm -f linux 143endef 144 145# When cleaning we don't include .config, so we don't include 146# TT or skas makefiles and don't clean skas_ptregs.h. 147CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \ 148 $(ARCH_DIR)/include/user_constants.h \ 149 $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch 150 151MRPROPER_FILES += $(ARCH_SYMLINKS) 152 153archclean: 154 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 155 -o -name '*.gcov' \) -type f -print | xargs rm -f 156 157$(SYMLINK_HEADERS): 158 @echo ' SYMLINK $@' 159ifneq ($(KBUILD_SRC),) 160 $(Q)mkdir -p $(objtree)/include/asm-um 161 $(Q)ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@ 162else 163 $(Q)cd $(TOPDIR)/$(dir $@) ; \ 164 ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@) 165endif 166 167include/asm-um/arch: 168 @echo ' SYMLINK $@' 169ifneq ($(KBUILD_SRC),) 170 $(Q)mkdir -p $(objtree)/include/asm-um 171 $(Q)ln -fsn $(srctree)/include/asm-$(HEADER_ARCH) include/asm-um/arch 172else 173 $(Q)cd $(TOPDIR)/include/asm-um && ln -fsn ../asm-$(HEADER_ARCH) arch 174endif 175 176$(objtree)/$(ARCH_DIR)/include: 177 @echo ' MKDIR $@' 178 $(Q)mkdir -p $@ 179 180$(ARCH_DIR)/include/sysdep: $(objtree)/$(ARCH_DIR)/include 181 @echo ' SYMLINK $@' 182ifneq ($(KBUILD_SRC),) 183 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep 184else 185 $(Q)cd $(ARCH_DIR)/include && ln -fsn sysdep-$(SUBARCH) sysdep 186endif 187 188$(ARCH_DIR)/os: 189 @echo ' SYMLINK $@' 190ifneq ($(KBUILD_SRC),) 191 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os 192else 193 $(Q)cd $(ARCH_DIR) && ln -fsn os-$(OS) os 194endif 195 196# Generated files 197define filechk_umlconfig 198 sed 's/ CONFIG/ UML_CONFIG/' 199endef 200 201$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h 202 $(call filechk,umlconfig) 203 204$(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE 205 $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@ 206 207define filechk_gen-asm-offsets 208 (set -e; \ 209 echo "/*"; \ 210 echo " * DO NOT MODIFY."; \ 211 echo " *"; \ 212 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 213 echo " *"; \ 214 echo " */"; \ 215 echo ""; \ 216 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 217 echo ""; ) 218endef 219 220$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s 221 $(call filechk,gen-asm-offsets) 222 223$(ARCH_DIR)/include/kern_constants.h: $(objtree)/$(ARCH_DIR)/include 224 @echo ' SYMLINK $@' 225 $(Q)ln -sf ../../../include/asm-um/asm-offsets.h $@ 226 227export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH 228