JamesM-Kernel-Tutorial/makefile at master · JetStarBlues/JamesM-Kernel-Tutorial · GitHub

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# Makefile code mashup of
#  https://github.com/mit-pdos/xv6-public/blob/master/Makefile
#  https://github.com/berkus/jamesm-tutorials/blob/master/Makefile

# Compiles every file in SOURCES, then links them together into one ELF binary (aka kernel)

# Setup -----------------------------

# Source paths
SRCDIR   = src/

VPATH  = $(SRCDIR)

# C files
CSOURCES =                        \
	main.c                        \
	$(SRCDIR)common.c             \
	$(SRCDIR)monitor.c            \
	$(SRCDIR)descriptorTables.c   \
	$(SRCDIR)interrupts.c         \
	$(SRCDIR)timer.c              \
	$(SRCDIR)kernelHeap.c         \
	$(SRCDIR)paging.c             \
	$(SRCDIR)orderedArray.c       \
	$(SRCDIR)fileSystem.c         \
	$(SRCDIR)initialRamDisk.c
COBJECTS =                        \
	main.o                        \
	$(SRCDIR)common.o             \
	$(SRCDIR)monitor.o            \
	$(SRCDIR)descriptorTables.o   \
	$(SRCDIR)interrupts.o         \
	$(SRCDIR)timer.o              \
	$(SRCDIR)kernelHeap.o         \
	$(SRCDIR)paging.o             \
	$(SRCDIR)orderedArray.o       \
	$(SRCDIR)fileSystem.o         \
	$(SRCDIR)initialRamDisk.o

# Assembly files
SSOURCES =                        \
	boot.s                        \
	$(SRCDIR)descriptorTables_.s  \
	$(SRCDIR)interrupts_.s
SOBJECTS =                        \
	boot.o                        \
	$(SRCDIR)descriptorTables_.o  \
	$(SRCDIR)interrupts_.o

# Images
ELF    = kernel
INITRD = initialRamDisk.img

# Other makefiles
FSMAKEPATH = tools/make_fs

# 32 bit flags
CFLAGS  = -nostdlib -nostdinc -fno-builtin -fno-stack-protector -m32 -Wall -g
ASFLAGS = -f elf -F dwarf -g
LDFLAGS = -T link.ld -m elf_i386

# 64 bit flags
# CFLAGS  = -nostdlib -nostdinc -fno-builtin -fno-stack-protector -Wall -g
# ASFLAGS = -f elf64 -F dwarf -g
# LDFLAGS = -T link.ld


# Generate ELF ----------------------

all:

	make clean

	@echo "Making all the things!"

	make _all

	make subsystem

_all: $(SOBJECTS) $(COBJECTS) link

clean:

	@echo "Removing object files ..."

	-rm *.o $(SRCDIR)*.o $(ELF)

link:

	@echo "Linking ..."

	ld $(LDFLAGS) -o $(ELF) $(SOBJECTS) $(COBJECTS)

.s.o:

	@echo "Assembling" $< "..."

	nasm $(ASFLAGS) $<

.c.o:

	@echo "Compiling" $< "..."

	gcc -c $(CFLAGS) $< -o $@


# Generate initrd -------------------

subsystem:

	cd $(FSMAKEPATH) && $(MAKE)


# Run QEMU --------------------------

# Path to QEMU
QEMU = qemu-system-i386

# Flags
# QEMUOPTS = -kernel $(ELF)
# QEMUOPTS = -kernel $(ELF) -D logfile -d cpu_reset
QEMUOPTS = -kernel $(ELF) -initrd $(INITRD)
# QEMUOPTS = -kernel $(ELF) -initrd $(INITRD) -D logfile -d cpu_reset


# Try to generate a unique GDB port
GDBPORT = $(shell expr `id -u` % 5000 + 25000)

# QEMU's gdb stub command line changed in 0.11
QEMUGDB = \
	$(shell if $(QEMU) -help | grep -q '^-gdb';  \
	then echo "-gdb tcp::$(GDBPORT)";            \
	else echo "-s -p $(GDBPORT)"; fi)

# Prompt user to setup GDB appropriately
gdbinit:

	@echo "\nOpen gdb in another window and type the following:"
	@#echo "   set architecture i386"
	@echo "   file kernel"
	@echo "   target remote :"$(GDBPORT)
	@echo "Use 'break' to set breakpoints, and 'continue' to execute.\n"

qemu:

	make all

	@echo "Starting QEMU ..."
	@echo "If using curses, press Esc+2 then type 'quit' to exit"

	@# $(QEMU) $(QEMUOPTS)
	$(QEMU) -display curses $(QEMUOPTS)

qemu-nox:

	make all

	@echo "Starting QEMU ..."

	$(QEMU) -nographic -monitor stdio $(QEMUOPTS)

qemu-gdb:

	make all

	make gdbinit

	@echo "Starting QEMU ..."

	@#$(QEMU) $(QEMUOPTS) -S $(QEMUGDB)
	$(QEMU) -display curses $(QEMUOPTS) -S $(QEMUGDB)

qemu-nox-gdb:

	make all

	make gdbinit

	@echo "Starting QEMU ..."
	@echo "If using curses, press Esc+2 then type 'quit' to exit"

	$(QEMU) -nographic $(QEMUOPTS) -S $(QEMUGDB)