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 ldt.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)/include/$(mode)) 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) -D_FILE_OFFSET_BITS=64 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 \ 71 -Dmktime=kernel_mktime 72CFLAGS += $(call cc-option,-fno-unit-at-a-time,) 73 74include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH) 75 76#This will adjust *FLAGS accordingly to the platform. 77include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) 78 79# These are needed for clean and mrproper, since in that case .config is not 80# included; the values here are meaningless 81 82CONFIG_NEST_LEVEL ?= 0 83CONFIG_KERNEL_HALF_GIGS ?= 0 84 85SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000) 86 87.PHONY: linux 88 89all: linux 90 91linux: vmlinux 92 ln -f $< $@ 93 94define archhelp 95 echo '* linux - Binary kernel image (./linux) - for backward' 96 echo ' compatibility only, this creates a hard link to the' 97 echo ' real kernel binary, the the "vmlinux" binary you' 98 echo ' find in the kernel root.' 99endef 100 101ifneq ($(KBUILD_SRC),) 102$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch) 103else 104$(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch) 105endif 106 107archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h 108prepare: $(ARCH_DIR)/include/kern_constants.h 109 110LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 111LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 112 113CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT 114CONFIG_KERNEL_STACK_ORDER ?= 2 115STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] ) 116 117ifndef START 118 START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] ) 119endif 120 121CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \ 122 -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ 123 -DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y) \ 124 -DKERNEL_STACK_SIZE=$(STACK_SIZE) \ 125 -DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap_fin.o 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 $(ARCH_DIR)/include/user_constants.h \ 144 $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch 145 146MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \ 147 $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os 148 149archclean: 150 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 151 -o -name '*.gcov' \) -type f -print | xargs rm -f 152 153$(SYMLINK_HEADERS): 154 @echo ' SYMLINK $@' 155ifneq ($(KBUILD_SRC),) 156 $(Q)ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@ 157else 158 $(Q)cd $(TOPDIR)/$(dir $@) ; \ 159 ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@) 160endif 161 162include/asm-um/arch: 163 @echo ' SYMLINK $@' 164ifneq ($(KBUILD_SRC),) 165 $(Q)mkdir -p include/asm-um 166 $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch 167else 168 $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch 169endif 170 171$(objtree)/$(ARCH_DIR)/include: 172 @echo ' MKDIR $@' 173 $(Q)mkdir -p $@ 174 175$(ARCH_DIR)/include/sysdep: $(objtree)/$(ARCH_DIR)/include 176 @echo ' SYMLINK $@' 177ifneq ($(KBUILD_SRC),) 178 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/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 $@ $< 201 202define filechk_gen-asm-offsets 203 (set -e; \ 204 echo "/*"; \ 205 echo " * DO NOT MODIFY."; \ 206 echo " *"; \ 207 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 208 echo " *"; \ 209 echo " */"; \ 210 echo ""; \ 211 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 212 echo ""; ) 213endef 214 215$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/user-offsets.s 216 $(call filechk,gen-asm-offsets) 217 218CLEAN_FILES += $(ARCH_DIR)/user-offsets.s 219 220$(ARCH_DIR)/include/kern_constants.h: $(objtree)/$(ARCH_DIR)/include 221 @echo ' SYMLINK $@' 222 $(Q) ln -sf ../../../include/asm-um/asm-offsets.h $@ 223 224export SUBARCH USER_CFLAGS OS 225