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