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#
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# Copyright (C) 2005 Martin Decky
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# - Redistributions of source code must retain the above copyright
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#   notice, this list of conditions and the following disclaimer.
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# - Redistributions in binary form must reproduce the above copyright
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#   notice, this list of conditions and the following disclaimer in the
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#   documentation and/or other materials provided with the distribution.
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# - The name of the author may not be used to endorse or promote products
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#   derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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## Kernel release
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#
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VERSION = 0
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PATCHLEVEL = 1
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SUBLEVEL = 0
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EXTRAVERSION = 
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NAME = Dawn
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RELEASE = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
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## Include configuration
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#
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-include Makefile.config
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## Common compiler flags
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#
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DEFS = -D$(ARCH) -DARCH=\"$(ARCH)\" -DRELEASE=\"$(RELEASE)\" "-DNAME=\"$(NAME)\""
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CFLAGS = -fno-builtin -fomit-frame-pointer -Wall -Werror-implicit-function-declaration -Wmissing-prototypes -Werror -O3 -nostdlib -nostdinc -Igeneric/include/ 
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LFLAGS = -M
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AFLAGS =
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ifdef REVISION
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	DEFS += "-DREVISION=\"$(REVISION)\""
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endif
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ifdef TIMESTAMP
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	DEFS += "-DTIMESTAMP=\"$(TIMESTAMP)\""
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endif
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## Setup kernel configuration
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#
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-include arch/$(ARCH)/Makefile.inc
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-include genarch/Makefile.inc
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ifeq ($(CONFIG_DEBUG),y)
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	DEFS += -DCONFIG_DEBUG
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endif
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ifeq ($(CONFIG_DEBUG_SPINLOCK),y)
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	DEFS += -DCONFIG_DEBUG_SPINLOCK
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endif
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ifeq ($(CONFIG_USERSPACE),y)
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	DEFS += -DCONFIG_USERSPACE
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endif
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ifeq ($(CONFIG_FPU_LAZY),y)
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	DEFS += -DCONFIG_FPU_LAZY
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endif
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## Toolchain configuration
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#
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ifeq ($(COMPILER),native)
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	CC = gcc
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	AS = as
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	LD = ld
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	OBJCOPY = objcopy
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	OBJDUMP = objdump
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else
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	CC = $(TOOLCHAIN_DIR)/$(TARGET)-gcc
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	AS = $(TOOLCHAIN_DIR)/$(TARGET)-as
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	LD = $(TOOLCHAIN_DIR)/$(TARGET)-ld
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	OBJCOPY = $(TOOLCHAIN_DIR)/$(TARGET)-objcopy
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	OBJDUMP = $(TOOLCHAIN_DIR)/$(TARGET)-objdump
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endif
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## Generic kernel sources
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#
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GENERIC_SOURCES = \
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	generic/src/console/chardev.c \
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	generic/src/console/console.c \
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	generic/src/console/kconsole.c \
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	generic/src/console/cmd.c \
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	generic/src/cpu/cpu.c \
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	generic/src/interrupt/interrupt.c \
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	generic/src/main/main.c \
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	generic/src/main/kinit.c \
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	generic/src/main/uinit.c \
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	generic/src/main/version.c \
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	generic/src/proc/scheduler.c \
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	generic/src/proc/thread.c \
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	generic/src/proc/task.c \
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	generic/src/proc/the.c \
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	generic/src/proc/syscall.c \
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	generic/src/mm/buddy.c \
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	generic/src/mm/heap.c \
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	generic/src/mm/frame.c \
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	generic/src/mm/page.c \
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	generic/src/mm/tlb.c \
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	generic/src/mm/vm.c \
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	generic/src/lib/func.c \
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	generic/src/lib/list.c \
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	generic/src/lib/memstr.c \
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	generic/src/lib/sort.c \
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	generic/src/debug/print.c \
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	generic/src/debug/symtab.c \
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	generic/src/time/clock.c \
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	generic/src/time/timeout.c \
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	generic/src/time/delay.c \
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	generic/src/preempt/preemption.c \
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	generic/src/synch/spinlock.c \
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	generic/src/synch/condvar.c \
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	generic/src/synch/rwlock.c \
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	generic/src/synch/mutex.c \
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	generic/src/synch/semaphore.c \
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	generic/src/synch/waitq.c \
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	generic/src/smp/ipi.c \
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	generic/src/fb/font-8x16.c
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## Test sources
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#
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ifneq ($(CONFIG_TEST),)
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	DEFS += -DCONFIG_TEST
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	GENERIC_SOURCES += test/$(CONFIG_TEST)/test.c
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endif
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GENERIC_OBJECTS := $(addsuffix .o,$(basename $(GENERIC_SOURCES)))
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ARCH_OBJECTS := $(addsuffix .o,$(basename $(ARCH_SOURCES)))
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GENARCH_OBJECTS := $(addsuffix .o,$(basename $(GENARCH_SOURCES)))
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.PHONY: all build clean config links depend boot
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all:
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	tools/config.py default
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	$(MAKE) -C . build
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build: kernel.bin boot disasm
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config:
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	-rm Makefile.depend
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	tools/config.py
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-include Makefile.depend
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distclean: clean
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	-rm Makefile.config
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clean:
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	-rm -f kernel.bin kernel.raw kernel.map kernel.map.pre kernel.objdump kernel.disasm generic/src/debug/real_map.bin Makefile.depend* generic/include/arch generic/include/genarch arch/$(ARCH)/_link.ld
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	find generic/src/ arch/*/src/ genarch/src/ test/ -name '*.o' -follow -exec rm \{\} \;
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	for arch in arch/*; do \
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	    [ -e $$arch/_link.ld ] && rm $$arch/_link.ld 2>/dev/null;\
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	    $(MAKE) -C $$arch/boot clean; \
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	done;exit 0
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archlinks:
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	ln -sfn ../../arch/$(ARCH)/include/ generic/include/arch
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	ln -sfn ../../genarch/include/ generic/include/genarch
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depend: archlinks
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	-makedepend $(DEFS) $(CFLAGS) -f - $(ARCH_SOURCES) $(GENARCH_SOURCES) $(GENERIC_SOURCES) > Makefile.depend 2> /dev/null
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arch/$(ARCH)/_link.ld: arch/$(ARCH)/_link.ld.in
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	$(CC) $(DEFS) $(CFLAGS) -E -x c $< | grep -v "^\#" > $@
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generic/src/debug/real_map.bin: depend arch/$(ARCH)/_link.ld $(ARCH_OBJECTS) $(GENARCH_OBJECTS) $(GENERIC_OBJECTS)
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	$(OBJCOPY) -I binary -O $(BFD_NAME) -B $(BFD_ARCH) --prefix-sections=symtab Makefile generic/src/debug/empty_map.o
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	$(LD) -T arch/$(ARCH)/_link.ld $(LFLAGS) $(ARCH_OBJECTS) $(GENARCH_OBJECTS) $(GENERIC_OBJECTS) generic/src/debug/empty_map.o -o $@ -Map kernel.map.pre
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	$(OBJDUMP) -t $(ARCH_OBJECTS) $(GENARCH_OBJECTS) $(GENERIC_OBJECTS) > kernel.objdump
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	tools/genmap.py kernel.map.pre kernel.objdump generic/src/debug/real_map.bin 
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	# Do it once again, this time to get correct even the symbols
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	# on architectures, that have bss after symtab
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	$(OBJCOPY) -I binary -O $(BFD_NAME) -B $(BFD_ARCH) --prefix-sections=symtab generic/src/debug/real_map.bin generic/src/debug/sizeok_map.o
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	$(LD) -T arch/$(ARCH)/_link.ld $(LFLAGS) $(ARCH_OBJECTS) $(GENARCH_OBJECTS) $(GENERIC_OBJECTS) generic/src/debug/sizeok_map.o -o $@ -Map kernel.map.pre
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	$(OBJDUMP) -t $(ARCH_OBJECTS) $(GENARCH_OBJECTS) $(GENERIC_OBJECTS) > kernel.objdump
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	tools/genmap.py kernel.map.pre kernel.objdump generic/src/debug/real_map.bin 
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generic/src/debug/real_map.o: generic/src/debug/real_map.bin
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	$(OBJCOPY) -I binary -O $(BFD_NAME) -B $(BFD_ARCH) --prefix-sections=symtab $< $@
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kernel.raw: depend arch/$(ARCH)/_link.ld $(ARCH_OBJECTS) $(GENARCH_OBJECTS) $(GENERIC_OBJECTS) generic/src/debug/real_map.o
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	$(LD) -T arch/$(ARCH)/_link.ld $(LFLAGS) $(ARCH_OBJECTS) $(GENARCH_OBJECTS) $(GENERIC_OBJECTS) generic/src/debug/real_map.o -o $@ -Map kernel.map
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kernel.bin: kernel.raw
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	$(OBJCOPY) -O $(BFD) kernel.raw kernel.bin
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boot: kernel.bin
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	if [ -d arch/$(ARCH)/boot ] ; then $(MAKE) -C arch/$(ARCH)/boot build KERNEL_SIZE="`cat kernel.bin | wc -c`" CC=$(CC) AS=$(AS) LD=$(LD) ; fi
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disasm: kernel.raw
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	$(OBJDUMP) -d kernel.raw > kernel.disasm
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%.o: %.S
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	$(CC) $(DEFS) $(AFLAGS) $(CFLAGS) -D__ASM__ -c $< -o $@
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%.o: %.s
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	$(AS) $(AFLAGS) $< -o $@
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%.o: %.c
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	$(CC) $(DEFS) $(CFLAGS) -c $< -o $@