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) $(ARCH_DIR)/include/uml-config.h 30 31um-modes-$(CONFIG_MODE_TT) += tt 32um-modes-$(CONFIG_MODE_SKAS) += skas 33 34MODE_INCLUDE += $(foreach mode,$(um-modes-y),\ 35 -I$(srctree)/$(ARCH_DIR)/kernel/$(mode)/include) 36 37MAKEFILES-INCL += $(foreach mode,$(um-modes-y),\ 38 $(srctree)/$(ARCH_DIR)/Makefile-$(mode)) 39 40ifneq ($(MAKEFILES-INCL),) 41 include $(MAKEFILES-INCL) 42endif 43 44ARCH_INCLUDE := -I$(ARCH_DIR)/include 45ifneq ($(KBUILD_SRC),) 46ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include 47endif 48SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH) 49 50# -Dvmap=kernel_vmap affects everything, and prevents anything from 51# referencing the libpcap.o symbol so named. 52# 53# Same things for in6addr_loopback - found in libc. 54 55CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \ 56 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ 57 -Din6addr_loopback=kernel_in6addr_loopback 58 59AFLAGS += $(ARCH_INCLUDE) 60 61USER_CFLAGS := $(patsubst -I%,,$(CFLAGS)) 62USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \ 63 $(MODE_INCLUDE) 64 65# -Derrno=kernel_errno - This turns all kernel references to errno into 66# kernel_errno to separate them from the libc errno. This allows -fno-common 67# in CFLAGS. Otherwise, it would cause ld to complain about the two different 68# errnos. 69 70CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask 71CFLAGS += $(call cc-option,-fno-unit-at-a-time,) 72 73include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH) 74 75#This will adjust *FLAGS accordingly to the platform. 76include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) 77 78# These are needed for clean and mrproper, since in that case .config is not 79# included; the values here are meaningless 80 81CONFIG_NEST_LEVEL ?= 0 82CONFIG_KERNEL_HALF_GIGS ?= 0 83 84SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000) 85 86.PHONY: linux 87 88all: linux 89 90linux: vmlinux 91 ln -f $< $@ 92 93define archhelp 94 echo '* linux - Binary kernel image (./linux) - for backward' 95 echo ' compatibility only, this creates a hard link to the' 96 echo ' real kernel binary, the the "vmlinux" binary you' 97 echo ' find in the kernel root.' 98endef 99 100ifneq ($(KBUILD_SRC),) 101$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch) 102else 103$(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch) 104endif 105 106archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h 107prepare: $(ARCH_DIR)/include/kern_constants.h 108 109LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 110LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 111 112CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT 113CONFIG_KERNEL_STACK_ORDER ?= 2 114STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] ) 115 116ifndef START 117 START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] ) 118endif 119 120CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \ 121 -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ 122 -DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y) \ 123 -DKERNEL_STACK_SIZE=$(STACK_SIZE) \ 124 -DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap_fin.o 125 126#The wrappers will select whether using "malloc" or the kernel allocator. 127LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc 128 129CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) 130define cmd_vmlinux__ 131 $(CC) $(CFLAGS_vmlinux) -o $@ \ 132 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \ 133 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \ 134 -lutil \ 135 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \ 136 FORCE ,$^) ; rm -f linux 137endef 138 139#When cleaning we don't include .config, so we don't include 140#TT or skas makefiles and don't clean skas_ptregs.h. 141CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \ 142 $(ARCH_DIR)/include/user_constants.h \ 143 $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch 144 145MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \ 146 $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os 147 148archclean: 149 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 150 -o -name '*.gcov' \) -type f -print | xargs rm -f 151 152$(SYMLINK_HEADERS): 153 @echo ' SYMLINK $@' 154ifneq ($(KBUILD_SRC),) 155 $(Q)ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@ 156else 157 $(Q)cd $(TOPDIR)/$(dir $@) ; \ 158 ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@) 159endif 160 161include/asm-um/arch: 162 @echo ' SYMLINK $@' 163ifneq ($(KBUILD_SRC),) 164 $(Q)mkdir -p include/asm-um 165 $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch 166else 167 $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch 168endif 169 170$(ARCH_DIR)/include/sysdep: 171 @echo ' SYMLINK $@' 172ifneq ($(KBUILD_SRC),) 173 $(Q)mkdir -p $(ARCH_DIR)/include 174 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep 175else 176 $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep 177endif 178 179$(ARCH_DIR)/os: 180 @echo ' SYMLINK $@' 181ifneq ($(KBUILD_SRC),) 182 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os 183else 184 $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os 185endif 186 187# Generated files 188define filechk_umlconfig 189 sed 's/ CONFIG/ UML_CONFIG/' 190endef 191 192define filechk_gen-asm-offsets 193 (set -e; \ 194 echo "/*"; \ 195 echo " * DO NOT MODIFY."; \ 196 echo " *"; \ 197 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 198 echo " *"; \ 199 echo " */"; \ 200 echo ""; \ 201 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 202 echo ""; ) 203endef 204 205$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h 206 $(call filechk,umlconfig) 207 208$(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c 209 $(CC) $(USER_CFLAGS) -S -o $@ $< 210 211$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/user-offsets.s 212 $(call filechk,gen-asm-offsets) 213 214CLEAN_FILES += $(ARCH_DIR)/user-offsets.s 215 216$(ARCH_DIR)/kernel-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/kernel-offsets.c \ 217 archprepare 218 $(CC) $(CFLAGS) $(NOSTDINC_FLAGS) $(CPPFLAGS) -S -o $@ $< 219 220$(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/kernel-offsets.s 221 $(call filechk,gen-asm-offsets) 222 223CLEAN_FILES += $(ARCH_DIR)/kernel-offsets.s 224 225export SUBARCH USER_CFLAGS OS 226