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 Jeff Dike (jdike@karaya.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) $(ARCH_DIR)/include/uml-config.h 33 34um-modes-$(CONFIG_MODE_TT) += tt 35um-modes-$(CONFIG_MODE_SKAS) += skas 36 37MODE_INCLUDE += $(foreach mode,$(um-modes-y),\ 38 -I$(srctree)/$(ARCH_DIR)/include/$(mode)) 39 40MAKEFILES-INCL += $(foreach mode,$(um-modes-y),\ 41 $(srctree)/$(ARCH_DIR)/Makefile-$(mode)) 42 43ifneq ($(MAKEFILES-INCL),) 44 include $(MAKEFILES-INCL) 45endif 46 47ARCH_INCLUDE := -I$(ARCH_DIR)/include 48ifneq ($(KBUILD_SRC),) 49ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include 50endif 51SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH) 52 53# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so 54# named - it's a common symbol in libpcap, so we get a binary which crashes. 55# 56# Same things for in6addr_loopback and mktime - found in libc. For these two we 57# only get link-time error, luckily. 58# 59# These apply to USER_CFLAGS to. 60 61CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \ 62 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ 63 -Din6addr_loopback=kernel_in6addr_loopback 64 65AFLAGS += $(ARCH_INCLUDE) 66 67USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\ 68 $(patsubst -I%,,$(CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \ 69 -D_FILE_OFFSET_BITS=64 70 71include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH) 72 73#This will adjust *FLAGS accordingly to the platform. 74include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) 75 76# -Derrno=kernel_errno - This turns all kernel references to errno into 77# kernel_errno to separate them from the libc errno. This allows -fno-common 78# in CFLAGS. Otherwise, it would cause ld to complain about the two different 79# errnos. 80# These apply to kernelspace only. 81 82KERNEL_DEFINES = -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ 83 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES) 84CFLAGS += $(KERNEL_DEFINES) 85CFLAGS += $(call cc-option,-fno-unit-at-a-time,) 86 87# These are needed for clean and mrproper, since in that case .config is not 88# included; the values here are meaningless 89 90CONFIG_NEST_LEVEL ?= 0 91CONFIG_KERNEL_HALF_GIGS ?= 0 92 93SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000) 94 95PHONY += linux 96 97all: linux 98 99linux: vmlinux 100 @echo ' LINK $@' 101 $(Q)ln -f $< $@ 102 103define archhelp 104 echo '* linux - Binary kernel image (./linux) - for backward' 105 echo ' compatibility only, this creates a hard link to the' 106 echo ' real kernel binary, the "vmlinux" binary you' 107 echo ' find in the kernel root.' 108endef 109 110ifneq ($(KBUILD_SRC),) 111$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch) 112else 113$(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch) 114endif 115 116archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h 117prepare: $(ARCH_DIR)/include/kern_constants.h 118 119LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 120LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 121 122CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \ 123 $(call cc-option, -fno-stack-protector,) \ 124 $(call cc-option, -fno-stack-protector-all,) 125 126CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT 127CONFIG_KERNEL_STACK_ORDER ?= 2 128STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] ) 129 130ifndef START 131 START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] ) 132endif 133 134CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \ 135 -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ 136 -DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y) \ 137 -DKERNEL_STACK_SIZE=$(STACK_SIZE) \ 138 -DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap.o 139 140#The wrappers will select whether using "malloc" or the kernel allocator. 141LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc 142 143CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) 144define cmd_vmlinux__ 145 $(CC) $(CFLAGS_vmlinux) -o $@ \ 146 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \ 147 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \ 148 -lutil \ 149 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \ 150 FORCE ,$^) ; rm -f linux 151endef 152 153#When cleaning we don't include .config, so we don't include 154#TT or skas makefiles and don't clean skas_ptregs.h. 155CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \ 156 $(ARCH_DIR)/include/user_constants.h \ 157 $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch 158 159MRPROPER_FILES += $(ARCH_SYMLINKS) 160 161archclean: 162 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 163 -o -name '*.gcov' \) -type f -print | xargs rm -f 164 165$(SYMLINK_HEADERS): 166 @echo ' SYMLINK $@' 167ifneq ($(KBUILD_SRC),) 168 $(Q)mkdir -p $(objtree)/include/asm-um 169 $(Q)ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@ 170else 171 $(Q)cd $(TOPDIR)/$(dir $@) ; \ 172 ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@) 173endif 174 175include/asm-um/arch: 176 @echo ' SYMLINK $@' 177ifneq ($(KBUILD_SRC),) 178 $(Q)mkdir -p $(objtree)/include/asm-um 179 $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch 180else 181 $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch 182endif 183 184$(objtree)/$(ARCH_DIR)/include: 185 @echo ' MKDIR $@' 186 $(Q)mkdir -p $@ 187 188$(ARCH_DIR)/include/sysdep: $(objtree)/$(ARCH_DIR)/include 189 @echo ' SYMLINK $@' 190ifneq ($(KBUILD_SRC),) 191 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep 192else 193 $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep 194endif 195 196$(ARCH_DIR)/os: 197 @echo ' SYMLINK $@' 198ifneq ($(KBUILD_SRC),) 199 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os 200else 201 $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os 202endif 203 204# Generated files 205define filechk_umlconfig 206 sed 's/ CONFIG/ UML_CONFIG/' 207endef 208 209$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h 210 $(call filechk,umlconfig) 211 212$(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE 213 $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@ 214 215define filechk_gen-asm-offsets 216 (set -e; \ 217 echo "/*"; \ 218 echo " * DO NOT MODIFY."; \ 219 echo " *"; \ 220 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 221 echo " *"; \ 222 echo " */"; \ 223 echo ""; \ 224 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 225 echo ""; ) 226endef 227 228$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s 229 $(call filechk,gen-asm-offsets) 230 231$(ARCH_DIR)/include/kern_constants.h: $(objtree)/$(ARCH_DIR)/include 232 @echo ' SYMLINK $@' 233 $(Q)ln -sf ../../../include/asm-um/asm-offsets.h $@ 234 235export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS 236