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 23include $(srctree)/$(ARCH_DIR)/Makefile-skas 24 25ARCH_INCLUDE := -I$(srctree)/$(ARCH_DIR)/include/shared 26ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)/shared 27ifneq ($(KBUILD_SRC),) 28ARCH_INCLUDE += -I$(ARCH_DIR)/include/shared # for two generated files 29endif 30KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH) 31 32# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so 33# named - it's a common symbol in libpcap, so we get a binary which crashes. 34# 35# Same things for in6addr_loopback and mktime - found in libc. For these two we 36# only get link-time error, luckily. 37# 38# These apply to USER_CFLAGS to. 39 40KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \ 41 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ 42 -Din6addr_loopback=kernel_in6addr_loopback \ 43 -Din6addr_any=kernel_in6addr_any 44 45KBUILD_AFLAGS += $(ARCH_INCLUDE) 46 47USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\ 48 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \ 49 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 50 51include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH) 52 53#This will adjust *FLAGS accordingly to the platform. 54include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) 55 56KBUILD_CPPFLAGS += -I$(srctree)/arch/$(HEADER_ARCH)/include 57 58# -Derrno=kernel_errno - This turns all kernel references to errno into 59# kernel_errno to separate them from the libc errno. This allows -fno-common 60# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different 61# errnos. 62# These apply to kernelspace only. 63# 64# strip leading and trailing whitespace to make the USER_CFLAGS removal of these 65# defines more robust 66 67KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ 68 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)) 69KBUILD_CFLAGS += $(KERNEL_DEFINES) 70 71PHONY += linux 72 73all: linux 74 75linux: vmlinux 76 @echo ' LINK $@' 77 $(Q)ln -f $< $@ 78 79define archhelp 80 echo '* linux - Binary kernel image (./linux) - for backward' 81 echo ' compatibility only, this creates a hard link to the' 82 echo ' real kernel binary, the "vmlinux" binary you' 83 echo ' find in the kernel root.' 84endef 85 86KBUILD_KCONFIG := arch/um/Kconfig.$(HEADER_ARCH) 87 88archprepare: $(ARCH_DIR)/include/shared/user_constants.h 89prepare: $(ARCH_DIR)/include/shared/kern_constants.h 90 91LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static 92LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib 93 94CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \ 95 $(call cc-option, -fno-stack-protector,) \ 96 $(call cc-option, -fno-stack-protector-all,) 97 98CONFIG_KERNEL_STACK_ORDER ?= 2 99STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] ) 100 101CPPFLAGS_vmlinux.lds = -U$(SUBARCH) -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ 102 -DELF_FORMAT="$(ELF_FORMAT)" -DKERNEL_STACK_SIZE=$(STACK_SIZE) 103 104# The wrappers will select whether using "malloc" or the kernel allocator. 105LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc 106 107LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt)) 108 109CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE) 110define cmd_vmlinux__ 111 $(CC) $(CFLAGS_vmlinux) -o $@ \ 112 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \ 113 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \ 114 -lutil \ 115 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \ 116 FORCE ,$^) ; rm -f linux 117endef 118 119# When cleaning we don't include .config, so we don't include 120# TT or skas makefiles and don't clean skas_ptregs.h. 121CLEAN_FILES += linux x.i gmon.out \ 122 $(ARCH_DIR)/include/shared/user_constants.h \ 123 $(ARCH_DIR)/include/shared/kern_constants.h 124 125archclean: 126 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ 127 -o -name '*.gcov' \) -type f -print | xargs rm -f 128 129$(objtree)/$(ARCH_DIR)/include/shared: 130 @echo ' MKDIR $@' 131 $(Q)mkdir -p $@ 132 133# Generated files 134 135$(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE 136 $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@ 137 138define filechk_gen-asm-offsets 139 (set -e; \ 140 echo "/*"; \ 141 echo " * DO NOT MODIFY."; \ 142 echo " *"; \ 143 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 144 echo " *"; \ 145 echo " */"; \ 146 echo ""; \ 147 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 148 echo ""; ) 149endef 150 151$(ARCH_DIR)/include/shared/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s 152 $(call filechk,gen-asm-offsets) 153 154$(ARCH_DIR)/include/shared/kern_constants.h: $(objtree)/$(ARCH_DIR)/include/shared 155 @echo ' SYMLINK $@' 156 $(Q)ln -sf ../../../../include/asm/asm-offsets.h $@ 157 158export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH DEV_NULL_PATH 159