Makefile - xv6-riscv Source

1K=kernel2U=user34OBJS = \5  $K/entry.o \6  $K/start.o \7  $K/console.o \8  $K/printf.o \9  $K/uart.o \10  $K/kalloc.o \11  $K/spinlock.o \12  $K/string.o \13  $K/main.o \14  $K/vm.o \15  $K/proc.o \16  $K/swtch.o \17  $K/trampoline.o \18  $K/trap.o \19  $K/syscall.o \20  $K/sysproc.o \21  $K/bio.o \22  $K/fs.o \23  $K/log.o \24  $K/sleeplock.o \25  $K/file.o \26  $K/pipe.o \27  $K/exec.o \28  $K/sysfile.o \29  $K/kernelvec.o \30  $K/plic.o \31  $K/virtio_disk.o3233# riscv64-unknown-elf- or riscv64-linux-gnu-34# perhaps in /opt/riscv/bin35#TOOLPREFIX = 3637# Try to infer the correct TOOLPREFIX if not set38ifndef TOOLPREFIX39TOOLPREFIX := $(shell if riscv64-unknown-elf-objdump -i 2>&1 | grep 'elf64-big' >/dev/null 2>&1; \40	then echo 'riscv64-unknown-elf-'; \41	elif riscv64-elf-objdump -i 2>&1 | grep 'elf64-big' >/dev/null 2>&1; \42	then echo 'riscv64-elf-'; \43	elif riscv64-none-elf-objdump -i 2>&1 | grep 'elf64-big' >/dev/null 2>&1; \44	then echo 'riscv64-none-elf-'; \45	elif riscv64-linux-gnu-objdump -i 2>&1 | grep 'elf64-big' >/dev/null 2>&1; \46	then echo 'riscv64-linux-gnu-'; \47	elif riscv64-unknown-linux-gnu-objdump -i 2>&1 | grep 'elf64-big' >/dev/null 2>&1; \48	then echo 'riscv64-unknown-linux-gnu-'; \49	else echo "***" 1>&2; \50	echo "*** Error: Couldn't find a riscv64 version of GCC/binutils." 1>&2; \51	echo "*** To turn off this error, run 'gmake TOOLPREFIX= ...'." 1>&2; \52	echo "***" 1>&2; exit 1; fi)53endif5455QEMU = qemu-system-riscv6456MIN_QEMU_VERSION = 7.25758CC = $(TOOLPREFIX)gcc59AS = $(TOOLPREFIX)gas60LD = $(TOOLPREFIX)ld61OBJCOPY = $(TOOLPREFIX)objcopy62OBJDUMP = $(TOOLPREFIX)objdump6364CFLAGS = -Wall -Werror -Wno-unknown-attributes -O -fno-omit-frame-pointer -ggdb -gdwarf-265CFLAGS += -march=rv64gc66CFLAGS += -MD67CFLAGS += -mcmodel=medany68CFLAGS += -ffreestanding69CFLAGS += -fno-common -nostdlib70CFLAGS += -fno-builtin-strncpy -fno-builtin-strncmp -fno-builtin-strlen -fno-builtin-memset71CFLAGS += -fno-builtin-memmove -fno-builtin-memcmp -fno-builtin-log -fno-builtin-bzero72CFLAGS += -fno-builtin-strchr -fno-builtin-exit -fno-builtin-malloc -fno-builtin-putc73CFLAGS += -fno-builtin-free74CFLAGS += -fno-builtin-memcpy -Wno-main75CFLAGS += -fno-builtin-printf -fno-builtin-fprintf -fno-builtin-vprintf76CFLAGS += -I.77CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)7879# Disable PIE when possible (for Ubuntu 16.10 toolchain)80ifneq ($(shell $(CC) -dumpspecs 2>/dev/null | grep -e '[^f]no-pie'),)81CFLAGS += -fno-pie -no-pie82endif83ifneq ($(shell $(CC) -dumpspecs 2>/dev/null | grep -e '[^f]nopie'),)84CFLAGS += -fno-pie -nopie85endif8687LDFLAGS = -z max-page-size=40968889$K/kernel: $(OBJS) $K/kernel.ld90	$(LD) $(LDFLAGS) -T $K/kernel.ld -o $K/kernel $(OBJS) 91	$(OBJDUMP) -S $K/kernel > $K/kernel.asm92	$(OBJDUMP) -t $K/kernel | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > $K/kernel.sym9394$K/%.o: $K/%.S95	$(CC) -march=rv64gc -g -c -o $@ $<9697tags: $(OBJS)98	etags kernel/*.S kernel/*.c99100ULIB = $U/ulib.o $U/usys.o $U/printf.o $U/umalloc.o101102_%: %.o $(ULIB) $U/user.ld103	$(LD) $(LDFLAGS) -T $U/user.ld -o $@ $< $(ULIB)104	$(OBJDUMP) -S $@ > $*.asm105	$(OBJDUMP) -t $@ | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > $*.sym106107$U/usys.S : $U/usys.pl108	perl $U/usys.pl > $U/usys.S109110$U/usys.o : $U/usys.S111	$(CC) $(CFLAGS) -c -o $U/usys.o $U/usys.S112113$U/_forktest: $U/forktest.o $(ULIB)114	# forktest has less library code linked in - needs to be small115	# in order to be able to max out the proc table.116	$(LD) $(LDFLAGS) -N -e main -Ttext 0 -o $U/_forktest $U/forktest.o $U/ulib.o $U/usys.o117	$(OBJDUMP) -S $U/_forktest > $U/forktest.asm118119mkfs/mkfs: mkfs/mkfs.c $K/fs.h $K/param.h120	gcc -Wno-unknown-attributes -I. -o mkfs/mkfs mkfs/mkfs.c121122# Prevent deletion of intermediate files, e.g. cat.o, after first build, so123# that disk image changes after first build are persistent until clean.  More124# details:125# http://www.gnu.org/software/make/manual/html_node/Chained-Rules.html126.PRECIOUS: %.o127128UPROGS=\129	$U/_cat\130	$U/_echo\131	$U/_forktest\132	$U/_grep\133	$U/_init\134	$U/_kill\135	$U/_ln\136	$U/_ls\137	$U/_mkdir\138	$U/_rm\139	$U/_sh\140	$U/_stressfs\141	$U/_usertests\142	$U/_grind\143	$U/_wc\144	$U/_zombie\145	$U/_logstress\146	$U/_forphan\147	$U/_dorphan\148149fs.img: mkfs/mkfs README $(UPROGS)150	mkfs/mkfs fs.img README $(UPROGS)151152-include kernel/*.d user/*.d153154clean: 155	rm -f *.tex *.dvi *.idx *.aux *.log *.ind *.ilg \156	*/*.o */*.d */*.asm */*.sym \157	$K/kernel fs.img \158	mkfs/mkfs .gdbinit \159        $U/usys.S \160	$(UPROGS)161162# try to generate a unique GDB port163GDBPORT = $(shell expr `id -u` % 5000 + 25000)164# QEMU's gdb stub command line changed in 0.11165QEMUGDB = $(shell if $(QEMU) -help | grep -q '^-gdb'; \166	then echo "-gdb tcp::$(GDBPORT)"; \167	else echo "-s -p $(GDBPORT)"; fi)168ifndef CPUS169CPUS := 3170endif171172QEMUOPTS = -machine virt -bios none -kernel $K/kernel -m 128M -smp $(CPUS) -nographic173QEMUOPTS += -global virtio-mmio.force-legacy=false174QEMUOPTS += -drive file=fs.img,if=none,format=raw,id=x0175QEMUOPTS += -device virtio-blk-device,drive=x0,bus=virtio-mmio-bus.0176177qemu: check-qemu-version $K/kernel fs.img178	$(QEMU) $(QEMUOPTS)179180.gdbinit: .gdbinit.tmpl-riscv181	sed "s/:1234/:$(GDBPORT)/" < $^ > $@182183qemu-gdb: $K/kernel .gdbinit fs.img184	@echo "*** Now run 'gdb' in another window." 1>&2185	$(QEMU) $(QEMUOPTS) -S $(QEMUGDB)186187print-gdbport:188	@echo $(GDBPORT)189190QEMU_VERSION := $(shell $(QEMU) --version | head -n 1 | sed -E 's/^QEMU emulator version ([0-9]+\.[0-9]+)\..*/\1/')191check-qemu-version:192	@if [ "$(shell echo "$(QEMU_VERSION) >= $(MIN_QEMU_VERSION)" | bc)" -eq 0 ]; then \193		echo "ERROR: Need qemu version >= $(MIN_QEMU_VERSION)"; \194		exit 1; \195	fi196