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 prevents anything from referencing the libpcap.o symbol so 51# named - it's a common symbol in libpcap, so we get a binary which crashes. 52# 53# Same things for in6addr_loopback and mktime - found in libc. For these two we 54# only get link-time error, luckily. 55# 56# These apply to USER_CFLAGS to. 57 58CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \ 59 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ 60 -Din6addr_loopback=kernel_in6addr_loopback 61 62AFLAGS += $(ARCH_INCLUDE) 63 64USER_CFLAGS := $(patsubst -I%,,$(CFLAGS)) 65USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \ 66 $(MODE_INCLUDE) -D_FILE_OFFSET_BITS=64 67 68# -Derrno=kernel_errno - This turns all kernel references to errno into 69# kernel_errno to separate them from the libc errno. This allows -fno-common 70# in CFLAGS. Otherwise, it would cause ld to complain about the two different 71# errnos. 72# These apply to kernelspace only. 73 74CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ 75 -Dmktime=kernel_mktime 76CFLAGS += $(call cc-option,-fno-unit-at-a-time,) 77 78include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH) 79 80#This will adjust *FLAGS accordingly to the platform. 81include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) 82 83# These are needed for clean and mrproper, since in that case .config is not 84# included; the values here are meaningless 85 86CONFIG_NEST_LEVEL ?= 0 87CONFIG_KERNEL_HALF_GIGS ?= 0 88 89SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000) 90 91.PHONY: linux 92 93all: linux 94 95linux: vmlinux 96 ln -f $< $@ 97 98define archhelp 99 echo '* linux - Binary kernel image (./linux) - for backward' 100 echo ' compatibility only, this creates a hard link to the' 101 echo ' real kernel binary, the the "vmlinux" binary you' 102 echo ' find in the kernel root.' 103endef 104 105ifneq ($(KBUILD_SRC),) 106$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch) 107else 108$(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch) 109endif 110 111archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h 112prepare: $(ARCH_DIR)/include/kern_constants.h 113 114LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 115LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 116 117CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT 118CONFIG_KERNEL_STACK_ORDER ?= 2 119STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] ) 120 121ifndef START 122 START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] ) 123endif 124 125CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \ 126 -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ 127 -DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y) \ 128 -DKERNEL_STACK_SIZE=$(STACK_SIZE) \ 129 -DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap_fin.o 130 131#The wrappers will select whether using "malloc" or the kernel allocator. 132LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc 133 134CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) 135define cmd_vmlinux__ 136 $(CC) $(CFLAGS_vmlinux) -o $@ \ 137 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \ 138 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \ 139 -lutil \ 140 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \ 141 FORCE ,$^) ; rm -f linux 142endef 143 144#When cleaning we don't include .config, so we don't include 145#TT or skas makefiles and don't clean skas_ptregs.h. 146CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \ 147 $(ARCH_DIR)/include/user_constants.h \ 148 $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch 149 150MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \ 151 $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os 152 153archclean: 154 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 155 -o -name '*.gcov' \) -type f -print | xargs rm -f 156 157$(SYMLINK_HEADERS): 158 @echo ' SYMLINK $@' 159ifneq ($(KBUILD_SRC),) 160 $(Q)ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@ 161else 162 $(Q)cd $(TOPDIR)/$(dir $@) ; \ 163 ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@) 164endif 165 166include/asm-um/arch: 167 @echo ' SYMLINK $@' 168ifneq ($(KBUILD_SRC),) 169 $(Q)mkdir -p include/asm-um 170 $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch 171else 172 $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch 173endif 174 175$(objtree)/$(ARCH_DIR)/include: 176 @echo ' MKDIR $@' 177 $(Q)mkdir -p $@ 178 179$(ARCH_DIR)/include/sysdep: $(objtree)/$(ARCH_DIR)/include 180 @echo ' SYMLINK $@' 181ifneq ($(KBUILD_SRC),) 182 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep 183else 184 $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep 185endif 186 187$(ARCH_DIR)/os: 188 @echo ' SYMLINK $@' 189ifneq ($(KBUILD_SRC),) 190 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os 191else 192 $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os 193endif 194 195# Generated files 196define filechk_umlconfig 197 sed 's/ CONFIG/ UML_CONFIG/' 198endef 199 200$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h 201 $(call filechk,umlconfig) 202 203$(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c 204 $(CC) $(USER_CFLAGS) -S -o $@ $< 205 206define filechk_gen-asm-offsets 207 (set -e; \ 208 echo "/*"; \ 209 echo " * DO NOT MODIFY."; \ 210 echo " *"; \ 211 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 212 echo " *"; \ 213 echo " */"; \ 214 echo ""; \ 215 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 216 echo ""; ) 217endef 218 219$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/user-offsets.s 220 $(call filechk,gen-asm-offsets) 221 222CLEAN_FILES += $(ARCH_DIR)/user-offsets.s 223 224$(ARCH_DIR)/include/kern_constants.h: $(objtree)/$(ARCH_DIR)/include 225 @echo ' SYMLINK $@' 226 $(Q) ln -sf ../../../include/asm-um/asm-offsets.h $@ 227 228export SUBARCH USER_CFLAGS OS 229