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- #
- # This file is included by the global makefile so that you can add your own
- # architecture-specific flags and dependencies.
- #
- # Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- # Licensed under the GPL
- #
- 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)/
- # Have to precede the include because the included Makefiles reference them.
- SYMLINK_HEADERS := archparam.h system.h sigcontext.h processor.h ptrace.h \
- module.h vm-flags.h elf.h host_ldt.h
- SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header))
- # XXX: The "os" symlink is only used by arch/um/include/os.h, which includes
- # ../os/include/file.h
- #
- # These are cleaned up during mrproper. Please DO NOT fix it again, this is
- # the Correct Thing(tm) to do!
- ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os \
- $(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h
- um-modes-$(CONFIG_MODE_TT) += tt
- um-modes-$(CONFIG_MODE_SKAS) += skas
- MODE_INCLUDE += $(foreach mode,$(um-modes-y),\
- -I$(srctree)/$(ARCH_DIR)/include/$(mode))
- MAKEFILES-INCL += $(foreach mode,$(um-modes-y),\
- $(srctree)/$(ARCH_DIR)/Makefile-$(mode))
- ifneq ($(MAKEFILES-INCL),)
- include $(MAKEFILES-INCL)
- endif
- ARCH_INCLUDE := -I$(ARCH_DIR)/include
- ifneq ($(KBUILD_SRC),)
- ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include
- endif
- SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH)
- # -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.
- #
- # Same things for in6addr_loopback and mktime - found in libc. For these two we
- # only get link-time error, luckily.
- #
- # These apply to USER_CFLAGS to.
- CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
- $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
- -Din6addr_loopback=kernel_in6addr_loopback
- AFLAGS += $(ARCH_INCLUDE)
- USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
- $(patsubst -I%,,$(CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
- -D_FILE_OFFSET_BITS=64
- include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
- #This will adjust *FLAGS accordingly to the platform.
- include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
- # -Derrno=kernel_errno - This turns all kernel references to errno into
- # kernel_errno to separate them from the libc errno. This allows -fno-common
- # in CFLAGS. Otherwise, it would cause ld to complain about the two different
- # errnos.
- # These apply to kernelspace only.
- KERNEL_DEFINES = -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
- -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)
- CFLAGS += $(KERNEL_DEFINES)
- CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
- # These are needed for clean and mrproper, since in that case .config is not
- # included; the values here are meaningless
- CONFIG_NEST_LEVEL ?= 0
- CONFIG_KERNEL_HALF_GIGS ?= 0
- SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
- PHONY += linux
- all: linux
- linux: vmlinux
- @echo ' LINK $@'
- $(Q)ln -f $< $@
- define archhelp
- echo '* linux - Binary kernel image (./linux) - for backward'
- echo ' compatibility only, this creates a hard link to the'
- echo ' real kernel binary, the "vmlinux" binary you'
- echo ' find in the kernel root.'
- endef
- ifneq ($(KBUILD_SRC),)
- $(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch)
- else
- $(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch)
- endif
- archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h
- prepare: $(ARCH_DIR)/include/kern_constants.h
- LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
- LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
- CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
- $(call cc-option, -fno-stack-protector,) \
- $(call cc-option, -fno-stack-protector-all,)
- CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT
- CONFIG_KERNEL_STACK_ORDER ?= 2
- STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
- ifndef START
- START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] )
- endif
- CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \
- -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
- -DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y) \
- -DKERNEL_STACK_SIZE=$(STACK_SIZE) \
- -DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap.o
- #The wrappers will select whether using "malloc" or the kernel allocator.
- LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
- CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS)
- define cmd_vmlinux__
- $(CC) $(CFLAGS_vmlinux) -o $@ \
- -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
- -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
- -lutil \
- $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \
- FORCE ,$^) ; rm -f linux
- endef
- #When cleaning we don't include .config, so we don't include
- #TT or skas makefiles and don't clean skas_ptregs.h.
- CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
- $(ARCH_DIR)/include/user_constants.h \
- $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch
- MRPROPER_FILES += $(ARCH_SYMLINKS)
- archclean:
- @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
- -o -name '*.gcov' \) -type f -print | xargs rm -f
- $(SYMLINK_HEADERS):
- @echo ' SYMLINK $@'
- ifneq ($(KBUILD_SRC),)
- $(Q)mkdir -p $(objtree)/include/asm-um
- $(Q)ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@
- else
- $(Q)cd $(TOPDIR)/$(dir $@) ; \
- ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@)
- endif
- include/asm-um/arch:
- @echo ' SYMLINK $@'
- ifneq ($(KBUILD_SRC),)
- $(Q)mkdir -p $(objtree)/include/asm-um
- $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch
- else
- $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch
- endif
- $(objtree)/$(ARCH_DIR)/include:
- @echo ' MKDIR $@'
- $(Q)mkdir -p $@
- $(ARCH_DIR)/include/sysdep: $(objtree)/$(ARCH_DIR)/include
- @echo ' SYMLINK $@'
- ifneq ($(KBUILD_SRC),)
- $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep
- else
- $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
- endif
- $(ARCH_DIR)/os:
- @echo ' SYMLINK $@'
- ifneq ($(KBUILD_SRC),)
- $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os
- else
- $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os
- endif
- # Generated files
- define filechk_umlconfig
- sed 's/ CONFIG/ UML_CONFIG/'
- endef
- $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
- $(call filechk,umlconfig)
- $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE
- $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@
- define filechk_gen-asm-offsets
- (set -e; \
- echo "/*"; \
- echo " * DO NOT MODIFY."; \
- echo " *"; \
- echo " * This file was generated by arch/$(ARCH)/Makefile"; \
- echo " *"; \
- echo " */"; \
- echo ""; \
- sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
- echo ""; )
- endef
- $(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s
- $(call filechk,gen-asm-offsets)
- $(ARCH_DIR)/include/kern_constants.h: $(objtree)/$(ARCH_DIR)/include
- @echo ' SYMLINK $@'
- $(Q)ln -sf ../../../include/asm-um/asm-offsets.h $@
- export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS
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