OBJS = \ bio.o\ console.o\ exec.o\ file.o\ fs.o\ ide.o\ ioapic.o\ kalloc.o\ kbd.o\ lapic.o\ log.o\ main.o\ mp.o\ picirq.o\ pipe.o\ proc.o\ sleeplock.o\ spinlock.o\ string.o\ swtch.o\ syscall.o\ sysfile.o\ sysproc.o\ trapasm.o\ trap.o\ uart.o\ vectors.o\ vm.o\ # Cross-compiling (e.g., on Mac OS X) # TOOLPREFIX = i386-jos-elf # Using native tools (e.g., on X86 Linux) #TOOLPREFIX = # Try to infer the correct TOOLPREFIX if not set ifndef TOOLPREFIX TOOLPREFIX := $(shell if i386-jos-elf-objdump -i 2>&1 | grep '^elf32-i386$$' >/dev/null 2>&1; \ then echo 'i386-jos-elf-'; \ elif objdump -i 2>&1 | grep 'elf32-i386' >/dev/null 2>&1; \ then echo ''; \ else echo "***" 1>&2; \ echo "*** Error: Couldn't find an i386-*-elf version of GCC/binutils." 1>&2; \ echo "*** Is the directory with i386-jos-elf-gcc in your PATH?" 1>&2; \ echo "*** If your i386-*-elf toolchain is installed with a command" 1>&2; \ echo "*** prefix other than 'i386-jos-elf-', set your TOOLPREFIX" 1>&2; \ echo "*** environment variable to that prefix and run 'make' again." 1>&2; \ echo "*** To turn off this error, run 'gmake TOOLPREFIX= ...'." 1>&2; \ echo "***" 1>&2; exit 1; fi) endif # If the makefile can't find QEMU, specify its path here # QEMU = qemu-system-i386 # Try to infer the correct QEMU ifndef QEMU QEMU = $(shell if which qemu > /dev/null; \ then echo qemu; exit; \ elif which qemu-system-i386 > /dev/null; \ then echo qemu-system-i386; exit; \ elif which qemu-system-x86_64 > /dev/null; \ then echo qemu-system-x86_64; exit; \ else \ qemu=/Applications/Q.app/Contents/MacOS/i386-softmmu.app/Contents/MacOS/i386-softmmu; \ if test -x $$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 += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector) ASFLAGS = -m32 -gdwarf-2 -Wa,-divide # FreeBSD ld wants ``elf_i386_fbsd'' LDFLAGS += -m $(shell $(LD) -V | grep elf_i386 2>/dev/null | head -n 1) # 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 xv6.img: bootblock kernel 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: bootasm.S bootmain.c $(CC) $(CFLAGS) -fno-pic -O -nostdinc -I. -c bootmain.c $(CC) $(CFLAGS) -fno-pic -nostdinc -I. -c 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 # The following line is here since it has been noticed that if you use Explorer to # copy folders on wsl, sometimees the execute permissions can be removed from perl scripts. # Uncomment if needed, but it will flag as a change for git. # chmod +x sign.pl ./sign.pl bootblock syscall.h: gensyscalls.pl ./gensyscalls.pl -h > syscall.h syscalltable.h: gensyscalls.pl ./gensyscalls.pl -c > syscalltable.h usys.S: gensyscalls.pl ./gensyscalls.pl -a > usys.S entryother: entryother.S $(CC) $(CFLAGS) -fno-pic -nostdinc -I. -c 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: initcode.S $(CC) $(CFLAGS) -nostdinc -I. -c 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: syscall.h syscalltable.h $(OBJS) entry.o entryother initcode kernel.ld $(LD) $(LDFLAGS) -T kernel.ld -o kernel entry.o $(OBJS) -b binary initcode entryother $(OBJDUMP) -S kernel > kernel.asm $(OBJDUMP) -t kernel | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > kernel.sym # 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 kernel.ld fs.img $(LD) $(LDFLAGS) -T kernel.ld -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/ .* / /; /^$$/d' > kernelmemfs.sym tags: $(OBJS) entryother.S _init etags *.S *.c vectors.S: vectors.pl # chmod +x vectors.pl ./vectors.pl > vectors.S ULIB = ulib.o usys.o printf.o umalloc.o _%: %.o $(ULIB) $(LD) $(LDFLAGS) -N -e _init -Ttext 0 -o $@ $^ $(OBJDUMP) -S $@ > $*.asm $(OBJDUMP) -t $@ | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > $*.sym _forktest: 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 _init -Ttext 0 -o _forktest forktest.o ulib.o usys.o $(OBJDUMP) -S _forktest > forktest.asm mkfs: mkfs.c fs.h gcc -Werror -Wall -o 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=\ _cat\ _echo\ _forktest\ _grep\ _init\ _kill\ _ln\ _ls\ _mkdir\ _rm\ _sh\ _stressfs\ _usertests\ _wc\ _zombie\ fs.img: mkfs $(UPROGS) ./mkfs fs.img $(UPROGS) -include *.d clean: rm -f *.tex *.dvi *.idx *.aux *.log *.ind *.ilg \ *.o *.d *.asm *.sym vectors.S bootblock entryother \ initcode initcode.out kernel xv6.img fs.img kernelmemfs \ xv6memfs.img mkfs .gdbinit \ syscall.h syscalltable.h usys.S \ $(UPROGS) # run in emulators # 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 = -drive file=fs.img,index=1,media=disk,format=raw -drive file=xv6.img,index=0,media=disk,format=raw -smp $(CPUS) -m 512 $(QEMUEXTRA) qemu: fs.img xv6.img $(QEMU) -vga std -serial mon:stdio $(QEMUOPTS) qemu-memfs: xv6memfs.img $(QEMU) -vga std -drive file=xv6memfs.img,index=0,media=disk,format=raw -smp $(CPUS) -m 256 qemu-nox: fs.img xv6.img $(QEMU) -nographic $(QEMUOPTS) qemu-curses: fs.img xv6.img $(QEMU) -curses $(QEMUOPTS) .gdbinit: .gdbinit.tmpl sed "s/localhost:1234/localhost:$(GDBPORT)/" < $^ > $@ qemu-gdb: fs.img xv6.img .gdbinit @echo "*** Now run 'gdb'." 1>&2 $(QEMU) -vga std -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)