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arch/um/Makefile
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# # This file is included by the global makefile so that you can add your own # architecture-specific flags and dependencies. # |
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# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
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# Licensed under the GPL # |
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# select defconfig based on actual architecture ifeq ($(SUBARCH),x86) ifeq ($(shell uname -m),x86_64) KBUILD_DEFCONFIG := x86_64_defconfig else KBUILD_DEFCONFIG := i386_defconfig endif else KBUILD_DEFCONFIG := $(SUBARCH)_defconfig endif |
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ARCH_DIR := arch/um OS := $(shell uname -s) # We require bash because the vmlinux link and loader script cpp use bash # features. SHELL := /bin/bash filechk_gen_header = $< core-y += $(ARCH_DIR)/kernel/ \ $(ARCH_DIR)/drivers/ \ $(ARCH_DIR)/os-$(OS)/ |
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MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas |
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HEADER_ARCH := $(SUBARCH) |
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ifneq ($(filter $(SUBARCH),x86 x86_64 i386),) HEADER_ARCH := x86 |
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endif |
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ifdef CONFIG_64BIT |
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KBUILD_CFLAGS += -mcmodel=large |
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endif |
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HOST_DIR := arch/$(HEADER_ARCH) |
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include $(ARCH_DIR)/Makefile-skas include $(HOST_DIR)/Makefile.um |
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core-y += $(HOST_DIR)/um/ |
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SHARED_HEADERS := $(ARCH_DIR)/include/shared ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS) |
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ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um |
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# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so # named - it's a common symbol in libpcap, so we get a binary which crashes. |
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# |
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# Same things for in6addr_loopback and mktime - found in libc. For these two we # only get link-time error, luckily. # |
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# -Dlongjmp=kernel_longjmp prevents anything from referencing the libpthread.a # embedded copy of longjmp, same thing for setjmp. # |
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# These apply to USER_CFLAGS to. |
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KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \ |
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$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ |
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-Dlongjmp=kernel_longjmp -Dsetjmp=kernel_setjmp \ |
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-Din6addr_loopback=kernel_in6addr_loopback \ |
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-Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr |
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KBUILD_AFLAGS += $(ARCH_INCLUDE) |
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USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \ $(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \ |
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-D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \ -idirafter $(obj)/include -D__KERNEL__ -D__UM_HOST__ |
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#This will adjust *FLAGS accordingly to the platform. |
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include $(ARCH_DIR)/Makefile-os-$(OS) |
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KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \ |
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-I$(srctree)/$(HOST_DIR)/include/uapi \ |
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-I$(objtree)/$(HOST_DIR)/include/generated \ -I$(objtree)/$(HOST_DIR)/include/generated/uapi |
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# -Derrno=kernel_errno - This turns all kernel references to errno into # kernel_errno to separate them from the libc errno. This allows -fno-common |
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# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different |
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# errnos. |
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# These apply to kernelspace only. |
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# # strip leading and trailing whitespace to make the USER_CFLAGS removal of these # defines more robust |
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KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)) |
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KBUILD_CFLAGS += $(KERNEL_DEFINES) |
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PHONY += linux |
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all: linux linux: vmlinux |
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@echo ' LINK $@' |
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$(Q)ln -f $< $@ |
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define archhelp echo '* linux - Binary kernel image (./linux) - for backward' echo ' compatibility only, this creates a hard link to the' |
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echo ' real kernel binary, the "vmlinux" binary you' |
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echo ' find in the kernel root.' endef |
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KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig |
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archheaders: |
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$(Q)$(MAKE) KBUILD_SRC= ARCH=$(HEADER_ARCH) archheaders |
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archprepare: include/generated/user_constants.h |
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LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static |
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LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib $(call cc-option, -no-pie) |
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CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \ $(call cc-option, -fno-stack-protector,) \ $(call cc-option, -fno-stack-protector-all,) |
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# Options used by linker script export LDS_START := $(START) export LDS_ELF_ARCH := $(ELF_ARCH) export LDS_ELF_FORMAT := $(ELF_FORMAT) |
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# The wrappers will select whether using "malloc" or the kernel allocator. |
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LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc |
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LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt)) |
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# Used by link-vmlinux.sh which has special support for um link export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE) |
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# When cleaning we don't include .config, so we don't include # TT or skas makefiles and don't clean skas_ptregs.h. |
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CLEAN_FILES += linux x.i gmon.out |
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archclean: |
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@find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ -o -name '*.gcov' \) -type f -print | xargs rm -f |
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# Generated files |
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$(HOST_DIR)/um/user-offsets.s: __headers FORCE |
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$(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@ |
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define filechk_gen-asm-offsets (set -e; \ |
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echo "/*"; \ echo " * DO NOT MODIFY."; \ echo " *"; \ echo " * This file was generated by arch/$(ARCH)/Makefile"; \ echo " *"; \ echo " */"; \ echo ""; \ sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ |
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echo ""; ) |
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endef |
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include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s |
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$(call filechk,gen-asm-offsets) |
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export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH |