1# 2# This file is included by the global makefile so that you can add your own 3# architecture-specific flags and dependencies. 4# 5# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 6# Licensed under the GPL 7# 8 9# select defconfig based on actual architecture 10ifeq ($(SUBARCH),x86) 11 ifeq ($(shell uname -m),x86_64) 12 KBUILD_DEFCONFIG := x86_64_defconfig 13 else 14 KBUILD_DEFCONFIG := i386_defconfig 15 endif 16else 17 KBUILD_DEFCONFIG := $(SUBARCH)_defconfig 18endif 19 20ARCH_DIR := arch/um 21OS := $(shell uname -s) 22# We require bash because the vmlinux link and loader script cpp use bash 23# features. 24SHELL := /bin/bash 25 26filechk_gen_header = $< 27 28core-y += $(ARCH_DIR)/kernel/ \ 29 $(ARCH_DIR)/drivers/ \ 30 $(ARCH_DIR)/os-$(OS)/ 31 32MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas 33 34HEADER_ARCH := $(SUBARCH) 35 36# Additional ARCH settings for x86 37ifeq ($(SUBARCH),i386) 38 HEADER_ARCH := x86 39endif 40ifeq ($(SUBARCH),x86_64) 41 HEADER_ARCH := x86 42 KBUILD_CFLAGS += -mcmodel=large 43endif 44 45HOST_DIR := arch/$(HEADER_ARCH) 46 47include $(srctree)/$(ARCH_DIR)/Makefile-skas 48include $(srctree)/$(HOST_DIR)/Makefile.um 49 50core-y += $(HOST_DIR)/um/ 51 52SHARED_HEADERS := $(ARCH_DIR)/include/shared 53ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS) 54ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared 55KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um 56 57# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so 58# named - it's a common symbol in libpcap, so we get a binary which crashes. 59# 60# Same things for in6addr_loopback and mktime - found in libc. For these two we 61# only get link-time error, luckily. 62# 63# These apply to USER_CFLAGS to. 64 65KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \ 66 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ 67 -Din6addr_loopback=kernel_in6addr_loopback \ 68 -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr 69 70KBUILD_AFLAGS += $(ARCH_INCLUDE) 71 72USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\ 73 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \ 74 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include 75 76#This will adjust *FLAGS accordingly to the platform. 77include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) 78 79KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \ 80 -I$(srctree)/$(HOST_DIR)/include/uapi \ 81 -I$(HOST_DIR)/include/generated \ 82 -I$(HOST_DIR)/include/generated/uapi 83 84# -Derrno=kernel_errno - This turns all kernel references to errno into 85# kernel_errno to separate them from the libc errno. This allows -fno-common 86# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different 87# errnos. 88# These apply to kernelspace only. 89# 90# strip leading and trailing whitespace to make the USER_CFLAGS removal of these 91# defines more robust 92 93KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ 94 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)) 95KBUILD_CFLAGS += $(KERNEL_DEFINES) 96 97PHONY += linux 98 99all: linux 100 101linux: vmlinux 102 @echo ' LINK $@' 103 $(Q)ln -f $< $@ 104 105define archhelp 106 echo '* linux - Binary kernel image (./linux) - for backward' 107 echo ' compatibility only, this creates a hard link to the' 108 echo ' real kernel binary, the "vmlinux" binary you' 109 echo ' find in the kernel root.' 110endef 111 112KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig 113 114archheaders: 115 $(Q)$(MAKE) -C '$(srctree)' KBUILD_SRC= \ 116 ARCH=$(HEADER_ARCH) O='$(objtree)' archheaders 117 118archprepare: include/generated/user_constants.h 119 120LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 121LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 122 123CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \ 124 $(call cc-option, -fno-stack-protector,) \ 125 $(call cc-option, -fno-stack-protector-all,) 126 127# Options used by linker script 128export LDS_START := $(START) 129export LDS_ELF_ARCH := $(ELF_ARCH) 130export LDS_ELF_FORMAT := $(ELF_FORMAT) 131 132# The wrappers will select whether using "malloc" or the kernel allocator. 133LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc 134 135LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt)) 136 137# Used by link-vmlinux.sh which has special support for um link 138export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE) 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 143 144archclean: 145 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 146 -o -name '*.gcov' \) -type f -print | xargs rm -f 147 148# Generated files 149 150$(HOST_DIR)/um/user-offsets.s: __headers FORCE 151 $(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@ 152 153define filechk_gen-asm-offsets 154 (set -e; \ 155 echo "/*"; \ 156 echo " * DO NOT MODIFY."; \ 157 echo " *"; \ 158 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 159 echo " *"; \ 160 echo " */"; \ 161 echo ""; \ 162 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 163 echo ""; ) 164endef 165 166include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s 167 $(call filechk,gen-asm-offsets) 168 169export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH 170