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 82PHONY += linux 83 84all: linux 85 86linux: vmlinux 87 @echo ' LINK $@' 88 $(Q)ln -f $< $@ 89 90define archhelp 91 echo '* linux - Binary kernel image (./linux) - for backward' 92 echo ' compatibility only, this creates a hard link to the' 93 echo ' real kernel binary, the "vmlinux" binary you' 94 echo ' find in the kernel root.' 95endef 96 97ifneq ($(KBUILD_SRC),) 98$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch) 99else 100$(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch) 101endif 102 103archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h 104prepare: $(ARCH_DIR)/include/kern_constants.h 105 106LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 107LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 108 109CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \ 110 $(call cc-option, -fno-stack-protector,) \ 111 $(call cc-option, -fno-stack-protector-all,) 112 113CONFIG_KERNEL_STACK_ORDER ?= 2 114STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] ) 115 116CPPFLAGS_vmlinux.lds = -U$(SUBARCH) -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ 117 -DELF_FORMAT="$(ELF_FORMAT)" -DKERNEL_STACK_SIZE=$(STACK_SIZE) 118 119# The wrappers will select whether using "malloc" or the kernel allocator. 120LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc 121 122LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt)) 123 124CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE) 125define cmd_vmlinux__ 126 $(CC) $(CFLAGS_vmlinux) -o $@ \ 127 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \ 128 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \ 129 -lutil \ 130 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \ 131 FORCE ,$^) ; rm -f linux 132endef 133 134# When cleaning we don't include .config, so we don't include 135# TT or skas makefiles and don't clean skas_ptregs.h. 136CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \ 137 $(ARCH_DIR)/include/user_constants.h \ 138 $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch 139 140MRPROPER_FILES += $(ARCH_SYMLINKS) 141 142archclean: 143 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 144 -o -name '*.gcov' \) -type f -print | xargs rm -f 145 146$(SYMLINK_HEADERS): 147 @echo ' SYMLINK $@' 148ifneq ($(KBUILD_SRC),) 149 $(Q)mkdir -p $(objtree)/include/asm-um 150 $(Q)ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@ 151else 152 $(Q)cd $(srctree)/$(dir $@) ; \ 153 ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@) 154endif 155 156include/asm-um/arch: 157 @echo ' SYMLINK $@' 158ifneq ($(KBUILD_SRC),) 159 $(Q)mkdir -p $(objtree)/include/asm-um 160 $(Q)ln -fsn $(srctree)/include/asm-$(HEADER_ARCH) include/asm-um/arch 161else 162 $(Q)cd $(srctree)/include/asm-um && ln -fsn ../asm-$(HEADER_ARCH) arch 163endif 164 165$(objtree)/$(ARCH_DIR)/include: 166 @echo ' MKDIR $@' 167 $(Q)mkdir -p $@ 168 169$(ARCH_DIR)/include/sysdep: $(objtree)/$(ARCH_DIR)/include 170 @echo ' SYMLINK $@' 171ifneq ($(KBUILD_SRC),) 172 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep 173else 174 $(Q)cd $(ARCH_DIR)/include && ln -fsn sysdep-$(SUBARCH) sysdep 175endif 176 177$(ARCH_DIR)/os: 178 @echo ' SYMLINK $@' 179ifneq ($(KBUILD_SRC),) 180 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os 181else 182 $(Q)cd $(ARCH_DIR) && ln -fsn os-$(OS) os 183endif 184 185# Generated files 186define filechk_umlconfig 187 sed 's/ CONFIG/ UML_CONFIG/' 188endef 189 190$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h 191 $(call filechk,umlconfig) 192 193$(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE 194 $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@ 195 196define filechk_gen-asm-offsets 197 (set -e; \ 198 echo "/*"; \ 199 echo " * DO NOT MODIFY."; \ 200 echo " *"; \ 201 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 202 echo " *"; \ 203 echo " */"; \ 204 echo ""; \ 205 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 206 echo ""; ) 207endef 208 209$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s 210 $(call filechk,gen-asm-offsets) 211 212$(ARCH_DIR)/include/kern_constants.h: $(objtree)/$(ARCH_DIR)/include 213 @echo ' SYMLINK $@' 214 $(Q)ln -sf ../../../include/asm-um/asm-offsets.h $@ 215 216export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH 217