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Makefile
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Makefile
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OBJS = \
sys/bio.o\
sys/console.o\
sys/exec.o\
sys/file.o\
sys/fs.o\
sys/ide.o\
sys/ioapic.o\
sys/kalloc.o\
sys/kbd.o\
sys/lapic.o\
sys/log.o\
sys/main.o\
sys/mp.o\
sys/picirq.o\
sys/pipe.o\
sys/proc.o\
sys/spinlock.o\
sys/string.o\
sys/swtch.o\
sys/syscall.o\
sys/sysfile.o\
sys/sysproc.o\
sys/timer.o\
sys/trapasm.o\
sys/trap.o\
sys/uart.o\
sys/vectors.o\
sys/vm.o\
OS := $(shell uname -s)
ifeq ($(OS),Darwin)
TOOLPREFIX = i386-elf-
else
TOOLPREFIX =
endif
# Try to infer the correct TOOLPREFIX if not set
ifndef TOOLPREFIX
TOOLPREFIX := $(shell if i386-jos-elf-objdump -i 2>&1 | grep '^elf32-i386$$' >/dev/null 2>&1; \
then echo 'i386-jos-elf-'; \
elif objdump -i 2>&1 | grep 'elf32-i386' >/dev/null 2>&1; \
then echo ''; \
else echo "***" 1>&2; \
echo "*** Error: Couldn't find an i386-*-elf version of GCC/binutils." 1>&2; \
echo "*** Is the directory with i386-jos-elf-gcc in your PATH?" 1>&2; \
echo "*** If your i386-*-elf toolchain is installed with a command" 1>&2; \
echo "*** prefix other than 'i386-jos-elf-', set your TOOLPREFIX" 1>&2; \
echo "*** environment variable to that prefix and run 'make' again." 1>&2; \
echo "*** To turn off this error, run 'gmake TOOLPREFIX= ...'." 1>&2; \
echo "***" 1>&2; exit 1; fi)
endif
# If the makefile can't find QEMU, specify its path here
QEMU=$(shell which qemu-system-i386)
# Try to infer the correct QEMU
ifndef QEMU
QEMU = $(shell if which qemu > /dev/null; \
then echo qemu; exit; \
else \
qemu=/Applications/Q.app/Contents/MacOS/i386-softmmu.app/Contents/MacOS/i386-softmmu; \
if test -x $$qemu; then echo $$qemu; exit; fi; fi; \
echo "***" 1>&2; \
echo "*** Error: Couldn't find a working QEMU executable." 1>&2; \
echo "*** Is the directory containing the qemu binary in your PATH" 1>&2; \
echo "*** or have you tried setting the QEMU variable in Makefile?" 1>&2; \
echo "***" 1>&2; exit 1)
endif
CC = $(TOOLPREFIX)gcc
AS = $(TOOLPREFIX)gas
LD = $(TOOLPREFIX)ld
OBJCOPY = $(TOOLPREFIX)objcopy
OBJDUMP = $(TOOLPREFIX)objdump
#CFLAGS = -fno-pic -static -fno-builtin -fno-strict-aliasing -O2 -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer
CFLAGS = -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -gdwarf-2 -Werror -fno-omit-frame-pointer
CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
CFLAGS += -I. -Iinclude
ASFLAGS = -m32 -gdwarf-2 -Wa,-divide -I. -Iinclude
# FreeBSD ld wants ``elf_i386_fbsd''
LDFLAGS += -m $(shell $(LD) -V | grep elf_i386 2>/dev/null)
xv6.img: bootblock kernel fs.img
dd if=/dev/zero of=xv6.img count=10000
dd if=bootblock of=xv6.img conv=notrunc
dd if=kernel of=xv6.img seek=1 conv=notrunc
xv6memfs.img: bootblock kernelmemfs
dd if=/dev/zero of=xv6memfs.img count=10000
dd if=bootblock of=xv6memfs.img conv=notrunc
dd if=kernelmemfs of=xv6memfs.img seek=1 conv=notrunc
bootblock: sys/bootasm.S sys/bootmain.c
$(CC) $(CFLAGS) -fno-pic -O -nostdinc -c sys/bootmain.c
$(CC) $(CFLAGS) -fno-pic -nostdinc -c sys/bootasm.S
$(LD) $(LDFLAGS) -N -e start -Ttext 0x7C00 -o bootblock.o bootasm.o bootmain.o
$(OBJDUMP) -S bootblock.o > bootblock.asm
$(OBJCOPY) -S -O binary -j .text bootblock.o bootblock
tools/sign.pl bootblock
entryother: sys/entryother.S
$(CC) $(CFLAGS) -fno-pic -nostdinc -I. -c sys/entryother.S
$(LD) $(LDFLAGS) -N -e start -Ttext 0x7000 -o bootblockother.o entryother.o
$(OBJCOPY) -S -O binary -j .text bootblockother.o entryother
$(OBJDUMP) -S bootblockother.o > entryother.asm
initcode: sys/initcode.S
$(CC) $(CFLAGS) -nostdinc -I. -c sys/initcode.S
$(LD) $(LDFLAGS) -N -e start -Ttext 0 -o initcode.out initcode.o
$(OBJCOPY) -S -O binary initcode.out initcode
$(OBJDUMP) -S initcode.o > initcode.asm
kernel: $(OBJS) sys/entry.o entryother initcode sys/kernel.ld
$(LD) $(LDFLAGS) -T sys/kernel.ld -o kernel sys/entry.o $(OBJS) -b binary initcode entryother
$(OBJDUMP) -S kernel > kernel.asm
$(OBJDUMP) -t kernel | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > kernel.sym
build/%.o: bin/%.c
@mkdir -p build
$(CC) $(CFLAGS) -c -o $@ $<
build/%.o: lib/%.c
@mkdir -p build
$(CC) $(CFLAGS) -c -o $@ $<
build/%.o: lib/%.S
@mkdir -p build
$(CC) $(ASFLAGS) -c -o $@ $<
# kernelmemfs is a copy of kernel that maintains the
# disk image in memory instead of writing to a disk.
# This is not so useful for testing persistent storage or
# exploring disk buffering implementations, but it is
# great for testing the kernel on real hardware without
# needing a scratch disk.
MEMFSOBJS = $(filter-out ide.o,$(OBJS)) memide.o
kernelmemfs: $(MEMFSOBJS) entry.o entryother initcode fs.img
$(LD) $(LDFLAGS) -Ttext 0x100000 -e main -o kernelmemfs entry.o $(MEMFSOBJS) -b binary initcode entryother fs.img
$(OBJDUMP) -S kernelmemfs > kernelmemfs.asm
$(OBJDUMP) -t kernelmemfs | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > kernelmemfs.sym
sys/vectors.S: tools/vectors.pl
perl tools/vectors.pl > sys/vectors.S
ULIB = build/ulib.o build/usys.o build/printf.o build/umalloc.o
_%: build/%.o $(ULIB)
$(LD) $(LDFLAGS) -N -e main -Ttext 0 -o $@ $^
$(OBJDUMP) -S $@ > build/$*.asm
$(OBJDUMP) -t $@ | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > build/$*.sym
_forktest: build/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 _forktest build/forktest.o build/ulib.o build/usys.o
$(OBJDUMP) -S _forktest > build/forktest.asm
mkfs: tools/mkfs.c include/fs.h
gcc -Werror -Wall -I. -o 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: build/%.o
UPROGS=\
_cat\
_echo\
_forktest\
_grep\
_init\
_kill\
_ln\
_ls\
_mkdir\
_rm\
_sh\
_stressfs\
_usertests\
_wc\
_zombie\
_dup2_test\
fs.img: mkfs README.md $(UPROGS)
./mkfs fs.img README.md $(UPROGS)
-include *.d
-include */*.d
clean:
rm -rf build
rm -f *.tex *.dvi *.idx *.aux *.log *.ind *.ilg *.o *.d *.asm *.sym \
sys/*.o sys/*.d sys/*.asm sys/*.sym sys/vectors.S \
bootblock entryother initcode initcode.out kernel xv6.img fs.img kernelmemfs mkfs \
.gdbinit $(UPROGS)
# run in emulators
bochs : fs.img xv6.img
if [ ! -e .bochsrc ]; then ln -s dot-bochsrc .bochsrc; fi
bochs -q
# 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 := 2
endif
QEMUOPTS = -hdb fs.img xv6.img -smp $(CPUS) -m 512 $(QEMUEXTRA)
qemu: fs.img xv6.img
$(QEMU) -serial mon:stdio $(QEMUOPTS)
qemu-memfs: xv6memfs.img
$(QEMU) xv6memfs.img -smp $(CPUS)
qemu-nox: fs.img xv6.img
$(QEMU) -nographic $(QEMUOPTS)
.gdbinit: .gdbinit.tmpl
sed "s/localhost:1234/localhost:$(GDBPORT)/" < $^ > $@
qemu-gdb: fs.img xv6.img .gdbinit
@echo "*** Now run 'gdb'." 1>&2
$(QEMU) -serial mon:stdio $(QEMUOPTS) -S $(QEMUGDB)
qemu-nox-gdb: fs.img xv6.img .gdbinit
@echo "*** Now run 'gdb'." 1>&2
$(QEMU) -nographic $(QEMUOPTS) -S $(QEMUGDB)