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Makefile
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-include local.mk
X64 ?= yes
BITS = 64
XOBJS = kobj/vm64.o
XFLAGS = -Werror -m64 -DX64 -mcmodel=kernel -mtls-direct-seg-refs -mno-red-zone
LDFLAGS = -m elf_x86_64 -nodefaultlibs
QEMU ?= qemu-system-x86_64
OPT ?= -O0
OBJS := \
kobj/bio.o\
kobj/ahci.o\
kobj/console.o\
kobj/exec.o\
kobj/file.o\
kobj/vfs.o\
kobj/ide.o\
kobj/ioapic.o\
kobj/kalloc.o\
kobj/kbd.o\
kobj/lapic.o\
kobj/log.o\
kobj/main.o\
kobj/mp.o\
kobj/acpi.o\
kobj/picirq.o\
kobj/pipe.o\
kobj/proc.o\
kobj/spinlock.o\
kobj/swtch$(BITS).o\
kobj/syscall.o\
kobj/sysfile.o\
kobj/sysproc.o\
kobj/timer.o\
kobj/trapasm$(BITS).o\
kobj/trap.o\
kobj/uart.o\
kobj/vectors.o\
kobj/vm.o\
kobj/vga.o\
kobj/pci.o\
kobj/sysstring.o\
$(XOBJS)
K_FS_SRCS = $(wildcard kernel/fs/*.c)
K_FS_OBJS = $(patsubst %.c,%.o,$(K_FS_SRCS))
ifneq ("$(MEMFS)","")
# build filesystem image in to kernel and use memory-ide-device
# instead of mounting the filesystem on ide1
OBJS := $(filter-out kobj/ide.o,$(OBJS)) kobj/memide.o
FSIMAGE := fs.img
endif
# Cross-compiling (e.g., on Mac OS X)
# TOOLPREFIX = /opt/cross/bin/x86_64-elf-
# Using native tools (e.g., on X86 Linux)
#TOOLPREFIX =
# /usr/bin/x86_64-linux-gnu-gcc
#x /usr/bin/86_64-linux-gnu-gcc-8
CC = $(TOOLPREFIX)gcc
AS = $(TOOLPREFIX)gas
LD = $(TOOLPREFIX)ld
OBJCOPY = $(TOOLPREFIX)objcopy
OBJDUMP = $(TOOLPREFIX)objdump
CFLAGS = -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -g -ggdb -fno-omit-frame-pointer
CFLAGS += -ffreestanding -fno-common -nostdlib -Iinclude -gdwarf-2 $(XFLAGS) $(OPT)
CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
ASFLAGS = -fno-pic -gdwarf-2 -Wa,-divide -Iinclude $(XFLAGS)
boot.img: out/bootblock out/kernel.elf fs.img
# Build boot disk image
dd if=/dev/zero of=boot.img count=10000
dd if=out/bootblock of=boot.img conv=notrunc
dd if=out/kernel.elf of=boot.img seek=1 conv=notrunc
cp boot.img bin/boot.img
qemu-img convert boot.img -O vdi bin/boot.vdi
xv6memfs.img: out/bootblock out/kernelmemfs.elf
dd if=/dev/zero of=xv6memfs.img count=10000
dd if=out/bootblock of=xv6memfs.img conv=notrunc
dd if=out/kernelmemfs.elf of=xv6memfs.img seek=1 conv=notrunc
# kernel object files
kobj/%.o: kernel/%.c
@mkdir -p kobj
$(CC) $(CFLAGS) -c -o $@ $<
kobj/fs/%.o: kernel/fs/%.c
@mkdir -p kobj/fs
$(CC) $(CFLAGS) -c -o $@ $<
kobj/%.o: kernel/%.S
@mkdir -p kobj
$(CC) $(ASFLAGS) -c -o $@ $<
# userspace object files
uobj/%.o: user/%.c
@mkdir -p uobj
$(CC) $(CFLAGS) -c -o $@ $<
uobj/%.o: ulib/%.c
@mkdir -p uobj
$(CC) $(CFLAGS) -c -o $@ $<
uobj/unix/%.o: ulib/unix/%.c
@mkdir -p uobj/unix
$(CC) $(CFLAGS) -c -o $@ $<
POSIXLIB = uobj/unix/ctype.o\
uobj/unix/stdio.o\
uobj/unix/string.o\
uobj/unix/strings.o\
uobj/unix/poll.o\
uobj/unix/stdlib.o\
uobj/posix.o: $(POSIXLIB) ulib/usys.o
ar rcs uobj/posix.o uobj/unix/*.o uobj/usys.o
uobj/%.o: ulib/%.S
@mkdir -p uobj
$(CC) $(ASFLAGS) -c -o $@ $<
out/bootblock: kernel/bootasm.S kernel/bootmain.c
@mkdir -p out
$(CC) -fno-builtin -fno-pic -m32 -nostdinc -Iinclude -O -o out/bootmain.o -g -c kernel/bootmain.c
$(CC) -fno-builtin -fno-pic -m32 -nostdinc -Iinclude -o out/bootasm.o -c kernel/bootasm.S
$(LD) -m elf_i386 -nodefaultlibs -N -e start -Ttext 0x7C00 -o out/bootblock.o out/bootasm.o out/bootmain.o
$(OBJDUMP) -S out/bootblock.o > out/bootblock.asm
$(OBJCOPY) -S -O binary -j .text out/bootblock.o out/bootblock
tools/sign.pl out/bootblock
out/entryother: kernel/entryother.S
@mkdir -p out
$(CC) $(CFLAGS) -fno-pic -nostdinc -I. -o out/entryother.o -c kernel/entryother.S
$(LD) $(LDFLAGS) -N -e start -Ttext 0x7000 -o out/bootblockother.o out/entryother.o
$(OBJCOPY) -S -O binary -j .text out/bootblockother.o out/entryother
$(OBJDUMP) -S out/bootblockother.o > out/entryother.asm
INITCODESRC = kernel/initcode$(BITS).S
out/initcode: $(INITCODESRC)
@mkdir -p out
$(CC) $(CFLAGS) -nostdinc -I. -o out/initcode.o -c $(INITCODESRC)
$(LD) $(LDFLAGS) -N -e start -Ttext 0 -o out/initcode.out out/initcode.o
$(OBJCOPY) -S -O binary out/initcode.out out/initcode
$(OBJDUMP) -S out/initcode.o > out/initcode.asm
ENTRYCODE = kobj/entry$(BITS).o
LINKSCRIPT = kernel/kernel$(BITS).ld
out/kernel.elf: $(OBJS) $(ENTRYCODE) out/entryother out/initcode $(LINKSCRIPT) $(FSIMAGE) $(K_FS_OBJS)
$(LD) $(LDFLAGS) -T $(LINKSCRIPT) -o out/kernel.elf $(ENTRYCODE) $(OBJS) $(K_FS_OBJS) -b binary out/initcode out/entryother $(FSIMAGE)
$(OBJDUMP) -S out/kernel.elf > out/kernel.asm
$(OBJDUMP) -t out/kernel.elf | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > bin/kernel.sym
cp out/kernel.elf bin/kernel
MKVECTORS = tools/vectors$(BITS).pl
kernel/vectors.S: $(MKVECTORS)
perl $(MKVECTORS) > kernel/vectors.S
ULIB = uobj/ulib.o uobj/usys.o uobj/printf.o uobj/umalloc.o uobj/string.o
fs/bin/%: uobj/%.o $(ULIB)
@mkdir -p fs out fs/bin
$(LD) $(LDFLAGS) -N -e main -Ttext 0 -o $@ $^
$(OBJDUMP) -S $@ > out/$*.asm
$(OBJDUMP) -t $@ | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > bin/$*.sym
fs/%: uobj/%.o $(ULIB)
@mkdir -p fs out fs/bin
$(LD) $(LDFLAGS) -N -e main -Ttext 0 -o $@ $^
$(OBJDUMP) -S $@ > out/$*.asm
$(OBJDUMP) -t $@ | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > bin/$*.sym
fs/forktest: uobj/forktest.o $(ULIB)
@mkdir -p fs
# 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 fs/forktest uobj/forktest.o uobj/ulib.o uobj/usys.o
$(OBJDUMP) -S fs/forktest > out/forktest.asm
out/mkfs: tools/mkfs.c include/vfs.h
gcc -Werror -Wall -o out/mkfs tools/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: uobj/%.o
SUBPROGS := $(wildcard user/*/.)
FORCE:
$(SUBPROGS): uobj/posix.o $(ULIB)
@mkdir -p fs/kexts
$(MAKE) -C $@
UPROGS=\
fs/bin/ps\
fs/bin/system\
fs/bin/cat\
fs/bin/echo\
fs/bin/grep\
fs/init\
fs/bin/kill\
fs/bin/uptime\
fs/bin/halt\
fs/bin/ln\
fs/bin/ls\
fs/bin/mkdir\
fs/bin/rm\
fs/bin/sh\
fs/bin/stress\
fs/bin/wc\
fs/bin/reboot\
fs/LICENSE: LICENSE
@mkdir -p fs
cp LICENSE fs/LICENSE
# headers: FORCE
# @mkdir -p fs/src/include
# cp -r include fs/src
fs.img: out/mkfs fs/LICENSE $(UPROGS) $(SUBPROGS)
find fs -type f | xargs out/mkfs fs.img $0
touch fs.img
cp fs.img bin/fs.img
qemu-img convert fs.img -O vdi bin/fs.vdi
dd if=/dev/zero of=bin/fs-ext2.img bs=1k count=2000
mkfs -t ext2 -i 1024 -b 1024 -F bin/fs-ext2.img
mkdir /tmp/loop
mount -o loop bin/fs-ext2.img /tmp/loop
cp -r ./fs/ /tmp/loop/
umount /tmp/loop
-include */*.d
clean:
rm -rf out fs uobj kobj
rm -rf ./bin/*
rm -f kernel/vectors.S boot.img xv6memfs.img fs.img .gdbinit
#put these back...
touch ./bin/.gitkeep
mkdir out
binaries : fs.img boot.img
#build fs.img & boot.img, now build vm images...
cp Xv64.vmwarevm.tar.gz ./bin/
cp -r fs ./bin/
cd ./bin/ && tar -xvzf Xv64.vmwarevm.tar.gz && rm Xv64.vmwarevm.tar.gz && cd ..
qemu-img convert boot.img -O vmdk bin/Xv64.vmwarevm/boot.vmdk
mkdir bin/artifacts
cp -r uobj bin/artifacts/
cp -r kobj bin/artifacts/
cp -r out bin/artifacts/
install: binaries
sudo ./install.sh