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Makefile
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K=kernel
U=user
OBJS = \
$K/entry.o \
$K/main.o \
$K/uart.o \
$K/printf.o \
$K/proc.o \
$K/spinlock.o \
$K/string.o \
$K/swtch.o \
$K/console.o \
$K/sleeplock.o \
$K/file.o \
$K/kalloc.o\
$K/vm.o\
$K/trap.o\
$K/kernelvec.o\
$K/tlbrefill.o\
$K/merror.o\
$K/apic.o\
$K/extioi.o\
$K/ramdisk.o\
$K/bio.o\
$K/log.o\
$K/fs.o\
$K/pipe.o\
$K/exec.o\
$K/syscall.o\
$K/sysproc.o\
$K/sysfile.o\
$K/uservec.o\
$K/exception.o
TOOLPREFIX = loongarch64-unknown-linux-gnu-
CC = $(TOOLPREFIX)gcc
AS = $(TOOLPREFIX)gas
LD = $(TOOLPREFIX)ld
OBJCOPY = $(TOOLPREFIX)objcopy
OBJDUMP = $(TOOLPREFIX)objdump
ASFLAGS = -march=loongarch64 -mabi=lp64s
CFLAGS = -Wall -Werror -O -fno-omit-frame-pointer -ggdb
CFLAGS += -MD
CFLAGS += -march=loongarch64 -mabi=lp64s
CFLAGS += -ffreestanding -fno-common -nostdlib
CFLAGS += -I. -fno-stack-protector
CFLAGS += -fno-pie -no-pie
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/ .* / /; /^$$/d' > $K/kernel.sym
$U/initcode: $U/initcode.S
$(CC) $(CFLAGS) -nostdinc -I. -Ikernel -c $U/initcode.S -o $U/initcode.o
$(LD) $(LDFLAGS) -N -e start -Ttext 0 -o $U/initcode.out $U/initcode.o
$(OBJCOPY) -S -O binary $U/initcode.out $U/initcode
$(OBJDUMP) -S $U/initcode.o > $U/initcode.asm
tags: $(OBJS) _init
etags *.S *.c
ULIB = $U/ulib.o $U/usys.o $U/printf.o $U/umalloc.o
_%: %.o $(ULIB)
$(LD) $(LDFLAGS) -N -e main -Ttext 0 -o $@ $^
$(OBJDUMP) -S $@ > $*.asm
$(OBJDUMP) -t $@ | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > $*.sym
$U/usys.S : $U/usys.pl
perl $U/usys.pl > $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
SH_FLAGS = -O -fno-omit-frame-pointer -ggdb -MD -march=loongarch64 -mabi=lp64s -ffreestanding -fno-common -nostdlib -I. -fno-stack-protector -fno-pie -no-pie -c -o
$U/_sh: $U/sh.c $(ULIB)
$(CC) $(SH_FLAGS) $U/sh.o $U/sh.c
$(LD) $(LDFLAGS) -N -e main -Ttext 0 -o $U/_sh $U/sh.o $(ULIB)
$(OBJDUMP) -S $U/_sh > $U/sh.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\
fs.img: mkfs/mkfs README.md $(UPROGS)
mkfs/mkfs fs.img README.md $(UPROGS)
xxd -i fs.img > kernel/ramdisk.h
-include kernel/*.d user/*.d
all: fs.img $K/kernel
clean:
rm -f *.tex *.dvi *.idx *.aux *.log *.ind *.ilg *.d \
*/*.o */*.d */*.asm */*.sym \
$U/initcode $U/initcode.out $K/kernel fs.img \
mkfs/mkfs .gdbinit \
$U/usys.S \
$(UPROGS)