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 69# -Derrno=kernel_errno - This turns all kernel references to errno into 70# kernel_errno to separate them from the libc errno. This allows -fno-common 71# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different 72# errnos. 73# These apply to kernelspace only. 74# 75# strip leading and trailing whitespace to make the USER_CFLAGS removal of these 76# defines more robust 77 78KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ 79 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)) 80KBUILD_CFLAGS += $(KERNEL_DEFINES) 81 82PHONY += linux 83 84all: linux 85 86linux: vmlinux 87 @echo ' LINK $@' 88 $(Q)ln -f $< $@ 89 90define archhelp 91 echo '* linux - Binary kernel image (./linux) - for backward' 92 echo ' compatibility only, this creates a hard link to the' 93 echo ' real kernel binary, the "vmlinux" binary you' 94 echo ' find in the kernel root.' 95endef 96 97KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig 98 99archprepare: include/generated/user_constants.h 100 101LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 102LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 103 104CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \ 105 $(call cc-option, -fno-stack-protector,) \ 106 $(call cc-option, -fno-stack-protector-all,) 107 108# Options used by linker script 109export LDS_START := $(START) 110export LDS_ELF_ARCH := $(ELF_ARCH) 111export LDS_ELF_FORMAT := $(ELF_FORMAT) 112 113# The wrappers will select whether using "malloc" or the kernel allocator. 114LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc 115 116LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt)) 117 118CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE) 119define cmd_vmlinux__ 120 $(CC) $(CFLAGS_vmlinux) -o $@ \ 121 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \ 122 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \ 123 -lutil \ 124 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \ 125 FORCE ,$^) ; rm -f linux 126endef 127 128# When cleaning we don't include .config, so we don't include 129# TT or skas makefiles and don't clean skas_ptregs.h. 130CLEAN_FILES += linux x.i gmon.out 131 132archclean: 133 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 134 -o -name '*.gcov' \) -type f -print | xargs rm -f 135 136# Generated files 137 138$(HOST_DIR)/um/user-offsets.s: FORCE 139 $(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@ 140 141define filechk_gen-asm-offsets 142 (set -e; \ 143 echo "/*"; \ 144 echo " * DO NOT MODIFY."; \ 145 echo " *"; \ 146 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 147 echo " *"; \ 148 echo " */"; \ 149 echo ""; \ 150 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 151 echo ""; ) 152endef 153 154include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s 155 $(call filechk,gen-asm-offsets) 156 157export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH 158