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