211 lines
6.3 KiB
Makefile
211 lines
6.3 KiB
Makefile
#
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# Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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# Licensed under the GPL
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#
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ARCH_DIR := arch/um
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OS := $(shell uname -s)
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# We require bash because the vmlinux link and loader script cpp use bash
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# features.
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SHELL := /bin/bash
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filechk_gen_header = $<
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core-y += $(ARCH_DIR)/kernel/ \
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$(ARCH_DIR)/drivers/ \
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$(ARCH_DIR)/os-$(OS)/
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# Have to precede the include because the included Makefiles reference them.
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SYMLINK_HEADERS := archparam.h system.h sigcontext.h processor.h ptrace.h \
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arch-signal.h module.h vm-flags.h
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SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header))
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# XXX: The "os" symlink is only used by arch/um/include/os.h, which includes
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# ../os/include/file.h
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#
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# These are cleaned up during mrproper. Please DO NOT fix it again, this is
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# the Correct Thing(tm) to do!
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ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os \
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$(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h
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GEN_HEADERS += $(ARCH_DIR)/include/task.h $(ARCH_DIR)/include/kern_constants.h
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um-modes-$(CONFIG_MODE_TT) += tt
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um-modes-$(CONFIG_MODE_SKAS) += skas
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MODE_INCLUDE += $(foreach mode,$(um-modes-y),\
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-I$(srctree)/$(ARCH_DIR)/kernel/$(mode)/include)
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MAKEFILES-INCL += $(foreach mode,$(um-modes-y),\
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$(srctree)/$(ARCH_DIR)/Makefile-$(mode))
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ifneq ($(MAKEFILES-INCL),)
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include $(MAKEFILES-INCL)
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endif
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ARCH_INCLUDE := -I$(ARCH_DIR)/include
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SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH)
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include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
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core-y += $(SUBARCH_CORE)
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libs-y += $(SUBARCH_LIBS)
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# -Derrno=kernel_errno - This turns all kernel references to errno into
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# kernel_errno to separate them from the libc errno. This allows -fno-common
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# in CFLAGS. Otherwise, it would cause ld to complain about the two different
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# errnos.
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CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
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$(ARCH_INCLUDE) $(MODE_INCLUDE)
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USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))
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USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
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$(MODE_INCLUDE) $(ARCH_USER_CFLAGS)
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CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask
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CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
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#This will adjust *FLAGS accordingly to the platform.
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include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
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# These are needed for clean and mrproper, since in that case .config is not
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# included; the values here are meaningless
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CONFIG_NEST_LEVEL ?= 0
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CONFIG_KERNEL_HALF_GIGS ?= 0
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SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
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ifeq ($(CONFIG_MODE_SKAS), y)
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$(SYS_HEADERS) : $(ARCH_DIR)/include/skas_ptregs.h
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endif
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.PHONY: linux
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all: linux
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linux: vmlinux
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ln -f $< $@
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define archhelp
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echo '* linux - Binary kernel image (./linux) - for backward'
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echo ' compatibility only, this creates a hard link to the'
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echo ' real kernel binary, the the "vmlinux" binary you'
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echo ' find in the kernel root.'
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endef
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$(shell cd $(ARCH_DIR) && ln -sf Kconfig_$(SUBARCH) Kconfig_arch)
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prepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS) \
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$(ARCH_DIR)/kernel/vmlinux.lds.S
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LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
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LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
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LD_SCRIPT-$(CONFIG_LD_SCRIPT_STATIC) := uml.lds.S
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LD_SCRIPT-$(CONFIG_LD_SCRIPT_DYN) := dyn.lds.S
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CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT
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CONFIG_KERNEL_STACK_ORDER ?= 2
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STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
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ifndef START
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START = $$(($(TOP_ADDR) - $(SIZE)))
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endif
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CPPFLAGS_vmlinux.lds = $(shell echo -U$(SUBARCH) \
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-DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
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-DELF_FORMAT=\"$(ELF_FORMAT)\" $(CPP_MODE-y) \
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-DKERNEL_STACK_SIZE=$(STACK_SIZE))
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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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CFLAGS_vmlinux = $(LINK-y) $(LINK_WRAPS)
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define cmd_vmlinux__
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$(CC) $(CFLAGS_vmlinux) -o $@ \
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-Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
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-Wl,--start-group $(vmlinux-main) -Wl,--end-group \
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-L/usr/lib -lutil \
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$(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \
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FORCE ,$^) ; rm -f linux
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endef
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#When cleaning we don't include .config, so we don't include
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#TT or skas makefiles and don't clean skas_ptregs.h.
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CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
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$(GEN_HEADERS) $(ARCH_DIR)/include/skas_ptregs.h
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MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \
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$(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os \
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$(ARCH_DIR)/Kconfig_arch
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archclean:
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$(Q)$(MAKE) $(clean)=$(ARCH_DIR)/util
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@find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
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-o -name '*.gcov' \) -type f -print | xargs rm -f
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#We need to re-preprocess this when the symlink dest changes.
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#So we touch it when needed.
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$(ARCH_DIR)/kernel/vmlinux.lds.S: FORCE
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$(Q)if [ "$(shell readlink $@)" != "$(LD_SCRIPT-y)" ]; then \
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echo ' SYMLINK $@'; \
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ln -sf $(LD_SCRIPT-y) $@; \
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touch $@; \
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fi;
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$(SYMLINK_HEADERS):
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@echo ' SYMLINK $@'
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$(Q)cd $(TOPDIR)/$(dir $@) ; \
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ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@)
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include/asm-um/arch:
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@echo ' SYMLINK $@'
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$(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch
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$(ARCH_DIR)/include/sysdep:
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@echo ' SYMLINK $@'
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$(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
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$(ARCH_DIR)/os:
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@echo ' SYMLINK $@'
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$(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os
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# Generated files
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define filechk_umlconfig
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sed 's/ CONFIG/ UML_CONFIG/'
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endef
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$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
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$(call filechk,umlconfig)
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$(ARCH_DIR)/include/task.h: $(ARCH_DIR)/util/mk_task
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$(call filechk,gen_header)
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$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/os/util/mk_user_constants
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$(call filechk,gen_header)
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$(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/util/mk_constants
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$(call filechk,gen_header)
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$(ARCH_DIR)/include/skas_ptregs.h: $(ARCH_DIR)/kernel/skas/util/mk_ptregs
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$(call filechk,gen_header)
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$(ARCH_DIR)/os/util/mk_user_constants: $(ARCH_DIR)/os/util FORCE ;
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$(ARCH_DIR)/util/mk_task $(ARCH_DIR)/util/mk_constants: $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/util \
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FORCE ;
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$(ARCH_DIR)/kernel/skas/util/mk_ptregs: $(ARCH_DIR)/kernel/skas/util FORCE ;
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$(ARCH_DIR)/util: scripts_basic $(SYS_DIR)/sc.h FORCE
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$(Q)$(MAKE) $(build)=$@
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$(ARCH_DIR)/kernel/skas/util: scripts_basic FORCE
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$(Q)$(MAKE) $(build)=$@
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$(ARCH_DIR)/os/util: scripts_basic FORCE
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$(Q)$(MAKE) $(build)=$@
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export SUBARCH USER_CFLAGS OS
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