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 arch-signal.h module.h vm-flags.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 47SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH) 48 49include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH) 50 51core-y += $(SUBARCH_CORE) 52libs-y += $(SUBARCH_LIBS) 53 54# -Derrno=kernel_errno - This turns all kernel references to errno into 55# kernel_errno to separate them from the libc errno. This allows -fno-common 56# in CFLAGS. Otherwise, it would cause ld to complain about the two different 57# errnos. 58 59CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \ 60 $(ARCH_INCLUDE) $(MODE_INCLUDE) 61 62USER_CFLAGS := $(patsubst -I%,,$(CFLAGS)) 63USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \ 64 $(MODE_INCLUDE) $(ARCH_USER_CFLAGS) 65CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask 66CFLAGS += $(call cc-option,-fno-unit-at-a-time,) 67 68#This will adjust *FLAGS accordingly to the platform. 69include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) 70 71# These are needed for clean and mrproper, since in that case .config is not 72# included; the values here are meaningless 73 74CONFIG_NEST_LEVEL ?= 0 75CONFIG_KERNEL_HALF_GIGS ?= 0 76 77SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000) 78 79ifeq ($(CONFIG_MODE_SKAS), y) 80$(SYS_HEADERS) : $(ARCH_DIR)/include/skas_ptregs.h 81endif 82 83.PHONY: linux 84 85all: linux 86 87linux: vmlinux 88 ln -f $< $@ 89 90define archhelp 91 echo '* linux - Binary kernel image (./linux) - for backward' 92 echo ' compatibility only, this creates a hard link to the' 93 echo ' real kernel binary, the the "vmlinux" binary you' 94 echo ' find in the kernel root.' 95endef 96 97$(shell cd $(ARCH_DIR) && ln -sf Kconfig_$(SUBARCH) Kconfig_arch) 98 99prepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS) \ 100 $(ARCH_DIR)/kernel/vmlinux.lds.S 101 102LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 103LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 104 105LD_SCRIPT-$(CONFIG_LD_SCRIPT_STATIC) := uml.lds.S 106LD_SCRIPT-$(CONFIG_LD_SCRIPT_DYN) := dyn.lds.S 107 108CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT 109CONFIG_KERNEL_STACK_ORDER ?= 2 110STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] ) 111 112ifndef START 113 START = $$(($(TOP_ADDR) - $(SIZE))) 114endif 115 116CPPFLAGS_vmlinux.lds = $(shell echo -U$(SUBARCH) \ 117 -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ 118 -DELF_FORMAT=\"$(ELF_FORMAT)\" $(CPP_MODE-y) \ 119 -DKERNEL_STACK_SIZE=$(STACK_SIZE)) 120 121#The wrappers will select whether using "malloc" or the kernel allocator. 122LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc 123 124CFLAGS_vmlinux = $(LINK-y) $(LINK_WRAPS) 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 -L/usr/lib -lutil \ 130 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \ 131 FORCE ,$^) ; 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 $(GEN_HEADERS) $(ARCH_DIR)/include/skas_ptregs.h 138 139MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \ 140 $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os \ 141 $(ARCH_DIR)/Kconfig_arch 142 143archclean: 144 $(Q)$(MAKE) $(clean)=$(ARCH_DIR)/util 145 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 146 -o -name '*.gcov' \) -type f -print | xargs rm -f 147 148#We need to re-preprocess this when the symlink dest changes. 149#So we touch it when needed. 150$(ARCH_DIR)/kernel/vmlinux.lds.S: FORCE 151 $(Q)if [ "$(shell readlink $@)" != "$(LD_SCRIPT-y)" ]; then \ 152 echo ' SYMLINK $@'; \ 153 ln -sf $(LD_SCRIPT-y) $@; \ 154 touch $@; \ 155 fi; 156 157$(SYMLINK_HEADERS): 158 @echo ' SYMLINK $@' 159 $(Q)cd $(TOPDIR)/$(dir $@) ; \ 160 ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@) 161 162include/asm-um/arch: 163 @echo ' SYMLINK $@' 164 $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch 165 166$(ARCH_DIR)/include/sysdep: 167 @echo ' SYMLINK $@' 168 $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep 169 170$(ARCH_DIR)/os: 171 @echo ' SYMLINK $@' 172 $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os 173 174# Generated files 175define filechk_umlconfig 176 sed 's/ CONFIG/ UML_CONFIG/' 177endef 178 179$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h 180 $(call filechk,umlconfig) 181 182$(ARCH_DIR)/include/task.h: $(ARCH_DIR)/util/mk_task 183 $(call filechk,gen_header) 184 185$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/os/util/mk_user_constants 186 $(call filechk,gen_header) 187 188$(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/util/mk_constants 189 $(call filechk,gen_header) 190 191$(ARCH_DIR)/include/skas_ptregs.h: $(ARCH_DIR)/kernel/skas/util/mk_ptregs 192 $(call filechk,gen_header) 193 194$(ARCH_DIR)/os/util/mk_user_constants: $(ARCH_DIR)/os/util FORCE ; 195 196$(ARCH_DIR)/util/mk_task $(ARCH_DIR)/util/mk_constants: $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/util \ 197 FORCE ; 198 199$(ARCH_DIR)/kernel/skas/util/mk_ptregs: $(ARCH_DIR)/kernel/skas/util FORCE ; 200 201$(ARCH_DIR)/util: scripts_basic $(SYS_DIR)/sc.h FORCE 202 $(Q)$(MAKE) $(build)=$@ 203 204$(ARCH_DIR)/kernel/skas/util: scripts_basic FORCE 205 $(Q)$(MAKE) $(build)=$@ 206 207$(ARCH_DIR)/os/util: scripts_basic FORCE 208 $(Q)$(MAKE) $(build)=$@ 209 210export SUBARCH USER_CFLAGS OS 211