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63 lines
2.0 KiB
Makefile
63 lines
2.0 KiB
Makefile
# Kernel Makefile
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# try `make help` for more information
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echo=$(shell which echo) -e
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# Default target
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.DEFAULT_GOAL = all
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# Path to the files for the initial ramdisk (for Assignment 7)
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INITRD_DIR ?= initrd/
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INITRD_TOOL ?= fs/tool/fstool
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INITRD_DEP =
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# 1MB free space
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INITRD_FREE ?= 1048576
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# Kernel source files
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LINKER_SCRIPT = compiler/sections.ld
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CC_SOURCES = $(shell find * -name "*.cc" -a ! -name '.*' -a ! -path 'test*' -a ! -path 'fs/tool/*' -a ! -path 'assets/*' -a ! -path 'tools/*')
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ASM_SOURCES = $(shell find * -name "*.asm" -a ! -name '.*')
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# Target files
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KERNEL = $(BUILDDIR)/system
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KERNEL64 = $(KERNEL)64
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ISOFILE = $(BUILDDIR)/stubs.iso
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KERNEL_LINK = $(ROOTBUILDDIR)/system.img
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# Include global variables and standard recipes
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include tools/common.mk
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# Initial Ramdisk
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ifneq ($(wildcard $(INITRD_DIR)*),)
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INITRD = $(BUILDDIR)/initrd.img
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INITRD_DEP += $(shell find $(INITRD_DIR) -type f )
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# Additional dependency for kernel
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$(KERNEL): $(INITRD)
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endif
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all: $(KERNEL)
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# Linking the system image
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# We use the C++ compiler (which calls the actual linker)
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$(KERNEL64): $(ASM_OBJECTS) $(CC_OBJECTS) $(LINKER_SCRIPT) $(MAKEFILE_LIST)
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@echo "LD $@"
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@mkdir -p $(@D)
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$(VERBOSE) $(CXX) $(CXXFLAGS) -Wl,-T $(LINKER_SCRIPT) -o $@ $(LDFLAGS) $(ASM_OBJECTS) $(CC_OBJECTS)
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@echo "LN $(KERNEL_LINK)"
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$(VERBOSE) ln -sf $(@:$(ROOTBUILDDIR)/%=%) "$(KERNEL_LINK)"
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# The kernel must be a 32bit elf for multiboot compliance
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$(KERNEL): $(KERNEL64)
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$(VERBOSE) $(OBJCOPY) -I elf64-x86-64 -O elf32-i386 $< $@
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# Tool for editing a Minix v3 file system image (Assignment 7)
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$(INITRD_TOOL): $(shell test -d $(dir $(INITRD_TOOL)) && find $(dir $(INITRD_TOOL)) -name "*.cc" -or -name '*.h')
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@echo "Make $@"
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@make -C $(dir $(INITRD_TOOL))
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# Initial Ramdisk with Minix v3 file system
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$(INITRD): $(INITRD_TOOL) $(INITRD_DEP)
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@echo "INITRD $@"
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@dd if=/dev/zero of=$@ bs=$(shell du -s $(INITRD_DIR) | cut -f1 | xargs expr $(INITRD_FREE) + ) count=1
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@mkfs.minix -3 $@ # optional --inodes <number>
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@./$(INITRD_TOOL) put "$(INITRD_DIR)" $@
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