1# 2# Copyright (C) 2002 Jeff Dike (jdike@karaya.com) 3# Licensed under the GPL 4# 5 6ARCH_DIR := arch/um 7OS := $(shell uname -s) 8# We require bash because the vmlinux link and loader script cpp use bash 9# features. 10SHELL := /bin/bash 11 12filechk_gen_header = $< 13 14core-y += $(ARCH_DIR)/kernel/ \ 15 $(ARCH_DIR)/drivers/ \ 16 $(ARCH_DIR)/os-$(OS)/ 17 18# Have to precede the include because the included Makefiles reference them. 19SYMLINK_HEADERS := archparam.h system.h sigcontext.h processor.h ptrace.h \ 20 module.h vm-flags.h elf.h 21SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header)) 22 23# XXX: The "os" symlink is only used by arch/um/include/os.h, which includes 24# ../os/include/file.h 25# 26# These are cleaned up during mrproper. Please DO NOT fix it again, this is 27# the Correct Thing(tm) to do! 28ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os \ 29 $(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h 30 31GEN_HEADERS += $(ARCH_DIR)/include/task.h $(ARCH_DIR)/include/kern_constants.h 32 33um-modes-$(CONFIG_MODE_TT) += tt 34um-modes-$(CONFIG_MODE_SKAS) += skas 35 36MODE_INCLUDE += $(foreach mode,$(um-modes-y),\ 37 -I$(srctree)/$(ARCH_DIR)/kernel/$(mode)/include) 38 39MAKEFILES-INCL += $(foreach mode,$(um-modes-y),\ 40 $(srctree)/$(ARCH_DIR)/Makefile-$(mode)) 41 42ifneq ($(MAKEFILES-INCL),) 43 include $(MAKEFILES-INCL) 44endif 45 46ARCH_INCLUDE := -I$(ARCH_DIR)/include 47ifneq ($(KBUILD_SRC),) 48ARCH_INCLUDE += -I$(ARCH_DIR)/include2 49ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include 50MRPROPER_DIRS += $(ARCH_DIR)/include2 51endif 52SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH) 53 54include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH) 55 56core-y += $(SUBARCH_CORE) 57libs-y += $(SUBARCH_LIBS) 58 59# -Derrno=kernel_errno - This turns all kernel references to errno into 60# kernel_errno to separate them from the libc errno. This allows -fno-common 61# in CFLAGS. Otherwise, it would cause ld to complain about the two different 62# errnos. 63 64CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \ 65 $(ARCH_INCLUDE) $(MODE_INCLUDE) 66 67USER_CFLAGS := $(patsubst -I%,,$(CFLAGS)) 68USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \ 69 $(MODE_INCLUDE) $(ARCH_USER_CFLAGS) 70CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask 71CFLAGS += $(call cc-option,-fno-unit-at-a-time,) 72 73#This will adjust *FLAGS accordingly to the platform. 74include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) 75 76# These are needed for clean and mrproper, since in that case .config is not 77# included; the values here are meaningless 78 79CONFIG_NEST_LEVEL ?= 0 80CONFIG_KERNEL_HALF_GIGS ?= 0 81 82SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000) 83 84ifeq ($(CONFIG_MODE_SKAS), y) 85$(SYS_HEADERS) : $(ARCH_DIR)/include/skas_ptregs.h 86endif 87 88.PHONY: linux 89 90all: linux 91 92linux: vmlinux 93 ln -f $< $@ 94 95define archhelp 96 echo '* linux - Binary kernel image (./linux) - for backward' 97 echo ' compatibility only, this creates a hard link to the' 98 echo ' real kernel binary, the the "vmlinux" binary you' 99 echo ' find in the kernel root.' 100endef 101 102ifneq ($(KBUILD_SRC),) 103$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig_$(SUBARCH) $(ARCH_DIR)/Kconfig_arch) 104CLEAN_FILES += $(ARCH_DIR)/Kconfig_arch 105else 106$(shell cd $(ARCH_DIR) && ln -sf Kconfig_$(SUBARCH) Kconfig_arch) 107endif 108 109prepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS) 110 111LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 112LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 113 114CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT 115CONFIG_KERNEL_STACK_ORDER ?= 2 116STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] ) 117 118ifndef START 119 START = $$(($(TOP_ADDR) - $(SIZE))) 120endif 121 122CPPFLAGS_vmlinux.lds = $(shell echo -U$(SUBARCH) \ 123 -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ 124 -DELF_FORMAT=\"$(ELF_FORMAT)\" $(CPP_MODE-y) \ 125 -DKERNEL_STACK_SIZE=$(STACK_SIZE) -DSUBARCH=$(SUBARCH)) 126 127#The wrappers will select whether using "malloc" or the kernel allocator. 128LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc 129 130CFLAGS_vmlinux = $(LINK-y) $(LINK_WRAPS) 131define 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) $(vmlinux-main) \ 137 FORCE ,$^) ; rm -f linux 138endef 139 140#When cleaning we don't include .config, so we don't include 141#TT or skas makefiles and don't clean skas_ptregs.h. 142CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \ 143 $(GEN_HEADERS) $(ARCH_DIR)/include/skas_ptregs.h 144 145MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \ 146 $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os \ 147 $(ARCH_DIR)/Kconfig_arch 148 149archclean: 150 $(Q)$(MAKE) $(clean)=$(ARCH_DIR)/util 151 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 152 -o -name '*.gcov' \) -type f -print | xargs rm -f 153 154$(SYMLINK_HEADERS): 155 @echo ' SYMLINK $@' 156ifneq ($(KBUILD_SRC),) 157 ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@ 158else 159 $(Q)cd $(TOPDIR)/$(dir $@) ; \ 160 ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@) 161endif 162 163include/asm-um/arch: 164 @echo ' SYMLINK $@' 165ifneq ($(KBUILD_SRC),) 166 $(Q)mkdir -p include/asm-um 167 $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch 168else 169 $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch 170endif 171 172$(ARCH_DIR)/include/sysdep: 173 @echo ' SYMLINK $@' 174ifneq ($(KBUILD_SRC),) 175 $(Q)mkdir -p $(ARCH_DIR)/include 176 $(Q)mkdir -p $(ARCH_DIR)/include2 177 $(Q)ln -fsn sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep 178 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include2/sysdep 179else 180 $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep 181endif 182 183$(ARCH_DIR)/os: 184 @echo ' SYMLINK $@' 185ifneq ($(KBUILD_SRC),) 186 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os 187else 188 $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os 189endif 190 191# Generated files 192define filechk_umlconfig 193 sed 's/ CONFIG/ UML_CONFIG/' 194endef 195 196$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h 197 $(call filechk,umlconfig) 198 199$(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c 200 $(CC) $(USER_CFLAGS) -S -o $@ $< 201 202$(ARCH_DIR)/user-offsets.h: $(ARCH_DIR)/user-offsets.s 203 $(call filechk,gen-asm-offsets) 204 205CLEAN_FILES += $(ARCH_DIR)/user-offsets.s $(ARCH_DIR)/user-offsets.h 206 207$(ARCH_DIR)/kernel-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/kernel-offsets.c \ 208 $(ARCH_SYMLINKS) \ 209 $(SYS_DIR)/sc.h \ 210 include/asm include/linux/version.h \ 211 include/config/MARKER \ 212 $(ARCH_DIR)/include/user_constants.h 213 $(CC) $(CFLAGS) $(NOSTDINC_FLAGS) $(CPPFLAGS) -S -o $@ $< 214 215$(ARCH_DIR)/kernel-offsets.h: $(ARCH_DIR)/kernel-offsets.s 216 $(call filechk,gen-asm-offsets) 217 218CLEAN_FILES += $(ARCH_DIR)/kernel-offsets.s $(ARCH_DIR)/kernel-offsets.h 219 220$(ARCH_DIR)/include/task.h: $(ARCH_DIR)/util/mk_task 221 $(call filechk,gen_header) 222 223$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/os-$(OS)/util/mk_user_constants 224 $(call filechk,gen_header) 225 226$(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/util/mk_constants 227 $(call filechk,gen_header) 228 229$(ARCH_DIR)/include/skas_ptregs.h: $(ARCH_DIR)/kernel/skas/util/mk_ptregs 230 $(call filechk,gen_header) 231 232$(ARCH_DIR)/os-$(OS)/util/mk_user_constants: $(ARCH_DIR)/os-$(OS)/util FORCE ; 233 234$(ARCH_DIR)/util/mk_task $(ARCH_DIR)/util/mk_constants: $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/util \ 235 FORCE ; 236 237$(ARCH_DIR)/kernel/skas/util/mk_ptregs: $(ARCH_DIR)/kernel/skas/util FORCE ; 238 239$(ARCH_DIR)/util: scripts_basic $(SYS_DIR)/sc.h $(ARCH_DIR)/kernel-offsets.h FORCE 240 $(Q)$(MAKE) $(build)=$@ 241 242$(ARCH_DIR)/kernel/skas/util: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE 243 $(Q)$(MAKE) $(build)=$@ 244 245$(ARCH_DIR)/os-$(OS)/util: scripts_basic FORCE 246 $(Q)$(MAKE) $(build)=$@ 247 248export SUBARCH USER_CFLAGS OS 249