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Makefile
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Makefile
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K=kernel
U=user
OBJS = \
$K/entry.o \
$K/start.o \
$K/console.o \
$K/printf.o \
$K/uart.o \
$K/kalloc.o \
$K/spinlock.o \
$K/string.o \
$K/main.o \
$K/vm.o \
$K/cpu.o \
$K/proc.o \
$K/swtch.o \
$K/trampoline.o \
$K/trap.o \
$K/syscall.o \
$K/sysproc.o \
$K/bio.o \
$K/fs.o \
$K/log.o \
$K/sleeplock.o \
$K/file.o \
$K/pipe.o \
$K/exec.o \
$K/sysfile.o \
$K/kernelvec.o \
$K/plic.o \
$K/virtio_disk.o
# Use one of the supported GCC prefixes
ifndef GCC
GCC := $(shell if command -v gcc-11.2.0 > /dev/null 2>&1; \
then echo 'gcc-11.2.0'; \
elif command -v gcc-11.1.0 > /dev/null 2>&1; \
then echo 'gcc-11.1.0'; \
elif command -v gcc-11 > /dev/null 2>&1; \
then echo 'gcc-11'; \
elif command -v gcc-10 > /dev/null 2>&1; \
then echo 'gcc-10'; \
elif command -v gcc > /dev/null 2>&1; \
then echo 'gcc'; \
else echo "Could not find GCC, please enter the correct version here manually"; \
fi)
endif
# riscv64-unknown-elf- or riscv64-linux-gnu-
# perhaps in /opt/riscv/bin
#TOOLPREFIX =
# Try to infer the correct TOOLPREFIX if not set
ifndef TOOLPREFIX
TOOLPREFIX := $(shell if riscv64-unknown-elf-objdump -i 2>&1 | grep 'elf64-big' >/dev/null 2>&1; \
then echo 'riscv64-unknown-elf-'; \
elif riscv64-linux-gnu-objdump -i 2>&1 | grep 'elf64-big' >/dev/null 2>&1; \
then echo 'riscv64-linux-gnu-'; \
elif riscv64-unknown-linux-gnu-objdump -i 2>&1 | grep 'elf64-big' >/dev/null 2>&1; \
then echo 'riscv64-unknown-linux-gnu-'; \
else echo "***" 1>&2; \
echo "*** Error: Couldn't find a riscv64 version of GCC/binutils." 1>&2; \
echo "*** To turn off this error, run 'gmake TOOLPREFIX= ...'." 1>&2; \
echo "***" 1>&2; exit 1; fi)
endif
# Use one of the supported GCC prefixes
ifndef RISCVGCCSUFFIX
RISCVGCCSUFFIX := $(shell if command -v $(TOOLPREFIX)gcc-11.2.0 > /dev/null 2>&1; \
then echo 'gcc-11.2.0'; \
elif command -v $(TOOLPREFIX)gcc-11.1.0 > /dev/null 2>&1; \
then echo 'gcc-11.1.0'; \
elif command -v $(TOOLPREFIX)gcc-11 > /dev/null 2>&1; \
then echo 'gcc-11'; \
elif command -v $(TOOLPREFIX)gcc-10 > /dev/null 2>&1; \
then echo 'gcc-10'; \
elif command -v $(TOOLPREFIX)gcc > /dev/null 2>&1; \
then echo 'gcc'; \
else echo "Could not find GCC, please enter the correct version here manually"; \
fi)
endif
QEMU = qemu-system-riscv64
GDB = $(TOOLPREFIX)gdb
CC = $(TOOLPREFIX)$(RISCVGCCSUFFIX)
AS = $(TOOLPREFIX)gas
LD = $(TOOLPREFIX)ld
OBJCOPY = $(TOOLPREFIX)objcopy
OBJDUMP = $(TOOLPREFIX)objdump
CFLAGS = -Wall -Werror -O -fno-omit-frame-pointer -ggdb -gdwarf-2
CFLAGS += -MD
CFLAGS += -mcmodel=medany
CFLAGS += -ffreestanding -fno-common -nostdlib -mno-relax
CFLAGS += -I.
CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
# Disable PIE when possible (for Ubuntu 16.10 toolchain)
ifneq ($(shell $(CC) -dumpspecs 2>/dev/null | grep -e '[^f]no-pie'),)
CFLAGS += -fno-pie -no-pie
endif
ifneq ($(shell $(CC) -dumpspecs 2>/dev/null | grep -e '[^f]nopie'),)
CFLAGS += -fno-pie -nopie
endif
LDFLAGS = -z max-page-size=4096
$K/kernel: $(OBJS) $K/kernel.ld $U/initcode
$(LD) $(LDFLAGS) -T $K/kernel.ld -o $K/kernel $(OBJS)
$(OBJDUMP) -S $K/kernel > $K/kernel.asm
$(OBJDUMP) -t $K/kernel | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > $K/kernel.sym
$U/initcode: $U/initcode.S
$(CC) $(CFLAGS) -march=rv64g -nostdinc -I. -Ikernel -c $U/initcode.S -o $U/initcode.o
$(LD) $(LDFLAGS) -N -e start -Ttext 0 -o $U/initcode.out $U/initcode.o
$(OBJCOPY) -S -O binary $U/initcode.out $U/initcode
$(OBJDUMP) -S $U/initcode.o > $U/initcode.asm
tags: $(OBJS) _init
etags *.S *.c
ULIB = $U/ulib.o $U/usys.o $U/printf.o $U/umalloc.o
_%: %.o $(ULIB)
$(LD) $(LDFLAGS) -N -e main -Ttext 0 -o $@ $^
$(OBJDUMP) -S $@ > $*.asm
$(OBJDUMP) -t $@ | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > $*.sym
$U/usys.S : $U/usys.sh
sh $U/usys.sh > $U/usys.S
$U/usys.o : $U/usys.S
$(CC) $(CFLAGS) -c -o $U/usys.o $U/usys.S
$U/_forktest: $U/forktest.o $(ULIB)
# forktest has less library code linked in - needs to be small
# in order to be able to max out the proc table.
$(LD) $(LDFLAGS) -N -e main -Ttext 0 -o $U/_forktest $U/forktest.o $U/ulib.o $U/usys.o
$(OBJDUMP) -S $U/_forktest > $U/forktest.asm
mkfs/mkfs: mkfs/mkfs.c $K/fs.h $K/param.h
$(GCC) -Werror -Wall -I. -o mkfs/mkfs mkfs/mkfs.c
# Prevent deletion of intermediate files, e.g. cat.o, after first build, so
# that disk image changes after first build are persistent until clean. More
# details:
# http://www.gnu.org/software/make/manual/html_node/Chained-Rules.html
.PRECIOUS: %.o
UPROGS= \
$U/_cat \
$U/_echo \
$U/_forktest \
$U/_grep \
$U/_init \
$U/_kill \
$U/_ln \
$U/_ls \
$U/_mkdir \
$U/_rm \
$U/_sh \
$U/_stressfs \
$U/_usertests \
$U/_grind \
$U/_wc \
$U/_zombie \
$U/_malloc_agent
fs.img: mkfs/mkfs README $(UPROGS)
mkfs/mkfs fs.img README $(UPROGS)
-include kernel/*.d user/*.d
clean:
rm -f *.tex *.dvi *.idx *.aux *.log *.ind *.ilg \
*/*.o */*.d */*.asm */*.sym \
$U/initcode $U/initcode.out $K/kernel fs.img \
mkfs/mkfs .gdbinit \
$U/usys.S \
$(UPROGS)
rm -rf logs/
# 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)
ifndef CPUS
CPUS := 3
endif
QEMUOPTS = -machine virt -bios none -kernel $K/kernel -m 128M -smp $(CPUS) -nographic
QEMUOPTS += -drive file=fs.img,if=none,format=raw,id=x0
QEMUOPTS += -device virtio-blk-device,drive=x0,bus=virtio-mmio-bus.0
GDBOPTS = --nx --x .gdbinit
build: $K/kernel fs.img
qemu: $K/kernel fs.img
$(QEMU) $(QEMUOPTS)
.gdbinit: .gdbinit.tmpl-riscv
sed "s/:1234/:$(GDBPORT)/" < $^ > $@
qemu-gdb: $K/kernel .gdbinit fs.img
@echo "*** Now run 'make gdb' in another window." 1>&2
$(QEMU) $(QEMUOPTS) -S $(QEMUGDB)
gdb:
$(GDB) $(GDBOPTS)
# Appended K means that only the kernel is compiled with the additional flag
# This is necessary since sometimes problems only occur in one of them
# Compile with kernel + userspace with GCC static analysis enabled
# -fanalyzer: GCC static analysis (for GCC >= 10.0 only)
# (https://developers.redhat.com/blog/2020/03/26/static-analysis-in-gcc-10/)
staticAnalysisK: CFLAGS += -fanalyzer -Wno-analyzer-malloc-leak
staticAnalysisK: $K/kernel
staticAnalysis: CFLAGS += -fanalyzer
staticAnalysis: $K/kernel fs.img
# Compile with undefined behavior sanitizer enabled
# -fsanitize=undefined: Fast undefined behavior check
# (https://gcc.gnu.org/onlinedocs/gcc-5.3.0/gcc/Debugging-Options.html#index-fsanitize_003dundefined-652)
ubsanK: CFLAGS += -fsanitize=undefined
ubsanK: $K/kernel
ubsan: CFLAGS += -fsanitize=undefined
ubsan: $K/kernel fs.img
# Compile with leak sanitizer enabled
# -fsanitize=leak Basic memory leak sanitizer
# (https://gcc.gnu.org/onlinedocs/gcc-5.3.0/gcc/Debugging-Options.html#index-fsanitize_003dundefined-652)
lsanK: CFLAGS += -fsanitize=leak
lsanK: $K/kernel
lsan: CFLAGS += -fsanitize=leak
lsan: $K/kernel fs.img
# Compile with address sanitizer enabled
# -fsanitize=address: Address sanitizer
# (https://gcc.gnu.org/onlinedocs/gcc-5.3.0/gcc/Debugging-Options.html#index-fsanitize_003dundefined-652)
asanK: CFLAGS += -fsanitize=address
asanK: $K/kernel
asan: CFLAGS += -fsanitize=address
asan: $K/kernel fs.img
# target test
QEMUOPTSTEST = -machine virt -bios none -kernel $K/kernel -m 128M -smp $(CPUS) #-nographic
QEMUOPTSTEST += -drive file=fs.img,if=none,format=raw,id=x0
QEMUOPTSTEST += -device virtio-blk-device,drive=x0,bus=virtio-mmio-bus.0
# disable display (we only interact with the guest via serial/uart)
QEMUOPTSTEST += -display none
# redirect the guest serial device to pipes on host
QEMUOPTSTEST += -chardev pipe,id=vmpipe,path=/tmp/gbs_test/vm -serial chardev:vmpipe
# redirect the qemu monitor to pipes on host
QEMUOPTSTEST += -chardev pipe,id=qemupipe,path=/tmp/gbs_test/qemu -mon chardev=qemupipe,mode=control
GDBOPTSTEST = --nx --interpreter=mi3
# Note: This target is for automated testing
test-qemu: $K/kernel fs.img
$(QEMU) $(QEMUOPTSTEST)
# Note: This target is for automated testing with gdb support
test-qemu-gdb: $K/kernel .gdbinit fs.img
$(QEMU) $(QEMUOPTSTEST) -S $(QEMUGDB)
# Note: This target is for automated testing in conjunction with test-qemu-gdb
# stdbuf is used to encapsulate gdb's input/output and disable buffering.
# This is required to trick gdb into using named pipes.
test-gdb:
stdbuf -i0 -o0 -e0 $(GDB) --nx --interpreter=mi3 < /tmp/gbs_test/gdb.in > /tmp/gbs_test/gdb.out