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 9ARCH_DIR := arch/um 10OS := $(shell uname -s) 11# We require bash because the vmlinux link and loader script cpp use bash 12# features. 13SHELL := /bin/bash 14 15filechk_gen_header = $< 16 17core-y += $(ARCH_DIR)/kernel/ \ 18 $(ARCH_DIR)/drivers/ \ 19 $(ARCH_DIR)/os-$(OS)/ 20 21MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas 22 23HEADER_ARCH := $(SUBARCH) 24 25# Additional ARCH settings for x86 26ifeq ($(SUBARCH),i386) 27 HEADER_ARCH := x86 28endif 29ifeq ($(SUBARCH),x86_64) 30 HEADER_ARCH := x86 31 KBUILD_CFLAGS += -mcmodel=large 32endif 33 34HOST_DIR := arch/$(HEADER_ARCH) 35 36include $(srctree)/$(ARCH_DIR)/Makefile-skas 37include $(srctree)/$(HOST_DIR)/Makefile.um 38 39core-y += $(HOST_DIR)/um/ 40 41SHARED_HEADERS := $(ARCH_DIR)/include/shared 42ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS) 43ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared 44KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um 45 46# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so 47# named - it's a common symbol in libpcap, so we get a binary which crashes. 48# 49# Same things for in6addr_loopback and mktime - found in libc. For these two we 50# only get link-time error, luckily. 51# 52# These apply to USER_CFLAGS to. 53 54KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \ 55 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ 56 -Din6addr_loopback=kernel_in6addr_loopback \ 57 -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr 58 59KBUILD_AFLAGS += $(ARCH_INCLUDE) 60 61USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\ 62 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \ 63 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include 64 65#This will adjust *FLAGS accordingly to the platform. 66include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) 67 68KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \ 69 -I$(srctree)/$(HOST_DIR)/include/uapi \ 70 -I$(HOST_DIR)/include/generated \ 71 -I$(HOST_DIR)/include/generated/uapi 72 73# -Derrno=kernel_errno - This turns all kernel references to errno into 74# kernel_errno to separate them from the libc errno. This allows -fno-common 75# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different 76# errnos. 77# These apply to kernelspace only. 78# 79# strip leading and trailing whitespace to make the USER_CFLAGS removal of these 80# defines more robust 81 82KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ 83 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)) 84KBUILD_CFLAGS += $(KERNEL_DEFINES) 85 86PHONY += linux 87 88all: linux 89 90linux: vmlinux 91 @echo ' LINK $@' 92 $(Q)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 "vmlinux" binary you' 98 echo ' find in the kernel root.' 99endef 100 101KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig 102 103archheaders: 104 $(Q)$(MAKE) -C '$(srctree)' KBUILD_SRC= \ 105 ARCH=$(HEADER_ARCH) O='$(objtree)' archheaders 106 107archprepare: include/generated/user_constants.h 108 109LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 110LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 111 112CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \ 113 $(call cc-option, -fno-stack-protector,) \ 114 $(call cc-option, -fno-stack-protector-all,) 115 116# Options used by linker script 117export LDS_START := $(START) 118export LDS_ELF_ARCH := $(ELF_ARCH) 119export LDS_ELF_FORMAT := $(ELF_FORMAT) 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 124LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt)) 125 126# Used by link-vmlinux.sh which has special support for um link 127export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE) 128 129# When cleaning we don't include .config, so we don't include 130# TT or skas makefiles and don't clean skas_ptregs.h. 131CLEAN_FILES += linux x.i gmon.out 132 133archclean: 134 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 135 -o -name '*.gcov' \) -type f -print | xargs rm -f 136 137# Generated files 138 139$(HOST_DIR)/um/user-offsets.s: __headers FORCE 140 $(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@ 141 142define filechk_gen-asm-offsets 143 (set -e; \ 144 echo "/*"; \ 145 echo " * DO NOT MODIFY."; \ 146 echo " *"; \ 147 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 148 echo " *"; \ 149 echo " */"; \ 150 echo ""; \ 151 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 152 echo ""; ) 153endef 154 155include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s 156 $(call filechk,gen-asm-offsets) 157 158export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH 159