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 ($(SUBARCH),x86_64) 30 HEADER_ARCH := x86 31endif 32 33HOST_DIR := arch/$(HEADER_ARCH) 34 35include $(srctree)/$(ARCH_DIR)/Makefile-skas 36include $(srctree)/$(HOST_DIR)/Makefile.um 37 38core-y += $(HOST_DIR)/um/ 39 40SHARED_HEADERS := $(ARCH_DIR)/include/shared 41ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS) 42ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared 43KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um 44 45# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so 46# named - it's a common symbol in libpcap, so we get a binary which crashes. 47# 48# Same things for in6addr_loopback and mktime - found in libc. For these two we 49# only get link-time error, luckily. 50# 51# These apply to USER_CFLAGS to. 52 53KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \ 54 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ 55 -Din6addr_loopback=kernel_in6addr_loopback \ 56 -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr 57 58KBUILD_AFLAGS += $(ARCH_INCLUDE) 59 60USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\ 61 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \ 62 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include 63 64#This will adjust *FLAGS accordingly to the platform. 65include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) 66 67KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \ 68 -I$(HOST_DIR)/include/generated 69 70# -Derrno=kernel_errno - This turns all kernel references to errno into 71# kernel_errno to separate them from the libc errno. This allows -fno-common 72# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different 73# errnos. 74# These apply to kernelspace only. 75# 76# strip leading and trailing whitespace to make the USER_CFLAGS removal of these 77# defines more robust 78 79KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ 80 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)) 81KBUILD_CFLAGS += $(KERNEL_DEFINES) 82 83PHONY += linux 84 85all: linux 86 87linux: vmlinux 88 @echo ' LINK $@' 89 $(Q)ln -f $< $@ 90 91define archhelp 92 echo '* linux - Binary kernel image (./linux) - for backward' 93 echo ' compatibility only, this creates a hard link to the' 94 echo ' real kernel binary, the "vmlinux" binary you' 95 echo ' find in the kernel root.' 96endef 97 98KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig 99 100archheaders: 101 $(Q)$(MAKE) -C '$(srctree)' KBUILD_SRC= \ 102 ARCH=$(SUBARCH) O='$(objtree)' archheaders 103 104archprepare: include/generated/user_constants.h 105 106LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 107LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 108 109CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \ 110 $(call cc-option, -fno-stack-protector,) \ 111 $(call cc-option, -fno-stack-protector-all,) 112 113# Options used by linker script 114export LDS_START := $(START) 115export LDS_ELF_ARCH := $(ELF_ARCH) 116export LDS_ELF_FORMAT := $(ELF_FORMAT) 117 118# The wrappers will select whether using "malloc" or the kernel allocator. 119LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc 120 121LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt)) 122 123CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE) 124define cmd_vmlinux__ 125 $(CC) $(CFLAGS_vmlinux) -o $@ \ 126 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \ 127 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \ 128 -lutil \ 129 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \ 130 FORCE ,$^) ; rm -f linux 131endef 132 133# When cleaning we don't include .config, so we don't include 134# TT or skas makefiles and don't clean skas_ptregs.h. 135CLEAN_FILES += linux x.i gmon.out 136 137archclean: 138 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 139 -o -name '*.gcov' \) -type f -print | xargs rm -f 140 141# Generated files 142 143$(HOST_DIR)/um/user-offsets.s: __headers FORCE 144 $(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@ 145 146define filechk_gen-asm-offsets 147 (set -e; \ 148 echo "/*"; \ 149 echo " * DO NOT MODIFY."; \ 150 echo " *"; \ 151 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 152 echo " *"; \ 153 echo " */"; \ 154 echo ""; \ 155 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 156 echo ""; ) 157endef 158 159include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s 160 $(call filechk,gen-asm-offsets) 161 162export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH 163