--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Makefile.osx	Fri Aug 04 20:53:15 2017 +0900
@@ -0,0 +1,75 @@
+# specify path to QEMU, installed with MacPorts 
+QEMU = qemu-system-arm
+
+include makefile-osx.inc
+
+# link the libgcc.a for __aeabi_idiv. ARM has no native support for div
+LIBS = $(LIBGCC)
+
+OBJS = \
+	lib/string.o \
+	\
+	arm.o\
+	asm.o\
+	bio.o\
+	buddy.o\
+	console.o\
+	exec.o\
+	file.o\
+	fs.o\
+	log.o\
+	main.o\
+	memide.o\
+	pipe.o\
+	proc.o\
+	spinlock.o\
+	start.o\
+	swtch.o\
+	syscall.o\
+	sysfile.o\
+	sysproc.o\
+	trap_asm.o\
+	trap.o\
+	vm.o \
+	\
+	device/picirq.o \
+	device/timer.o \
+	device/uart.o
+
+KERN_OBJS = $(OBJS) entry-osx.o 
+kernel.elf: $(addprefix build/,$(KERN_OBJS)) kernel.ld build/initcode build/fs.img
+	cp -f build/initcode initcode
+	cp -f build/fs.img fs.img
+	$(call LINK_BIN, kernel.ld, kernel.elf, \
+		$(addprefix build/,$(KERN_OBJS)), \
+		initcode fs.img)
+	$(OBJDUMP) -S kernel.elf > kernel.asm
+	$(OBJDUMP) -t kernel.elf | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > kernel.sym
+	rm -f initcode fs.img
+
+qemu: kernel.elf
+	@clear
+	@echo "Press Ctrl-A and then X to terminate QEMU session\n"
+	$(QEMU) -M versatilepb -m 128 -cpu arm1176  -nographic -kernel kernel.elf
+
+INITCODE_OBJ = initcode.o
+$(addprefix build/,$(INITCODE_OBJ)): initcode.S
+	$(call build-directory)
+	$(call AS_WITH, -nostdinc -I.)
+
+#initcode is linked into the kernel, it will be used to craft the first process
+build/initcode: $(addprefix build/,$(INITCODE_OBJ))
+	$(call LINK_INIT, -e start )
+	$(call OBJCOPY_INIT)
+	$(OBJDUMP) -S $< > initcode.asm
+
+build/fs.img:
+	make -C tools
+	make -C usr
+
+clean: 
+	rm -rf build
+	rm -f *.o *.d *.asm *.sym vectors.S bootblock entryother \
+	initcode initcode.out kernel xv6.img fs.img kernel.elf memfs
+	make -C tools clean
+	make -C usr clean

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/entry-osx.S	Fri Aug 04 20:53:15 2017 +0900
@@ -0,0 +1,33 @@
+#include "arm.h"
+#include "memlayout.h"
+
+.text
+.code 32
+
+.global _start
+
+_start:
+    # clear the entry bss section, the svc stack, and kernel page table
+    LDR     r1, =edata_entry
+    LDR     r2, =end_entry
+    MOV     r3, #0x00
+
+1:
+    CMP     r1, r2
+    STMIALT r1!, {r3}
+    BLT     1b
+
+    # initialize stack pointers for svc modes
+    MSR     CPSR_cxsf, #(SVC_MODE|NO_INT)
+    LDR     sp, =svc_stktop
+
+    BL      start
+    B .
+
+# during startup, kernel stack uses user address, now switch it to kernel addr
+.global jump_stack
+jump_stack:
+    MOV     r0, sp
+    ADD     r0, r0, #KERNBASE
+    MOV     sp, r0
+    MOV     pc, lr

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/makefile-osx.inc	Fri Aug 04 20:53:15 2017 +0900
@@ -0,0 +1,48 @@
+# Cross-compiling (e.g., on Mac OS X, install arm-none-eabi-gcc with MacPorts)
+CROSSCOMPILE := 
+
+CC = $(CROSSCOMPILE)/Users/one/src/cbclang-arm/build/bin/clang
+AS = $(CROSSCOMPILE)as
+LD = $(CROSSCOMPILE)ld
+OBJCOPY = $(CROSSCOMPILE)objcopy
+OBJDUMP = $(CROSSCOMPILE)objdump
+
+CFLAGS = -arch arm -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -Werror -I. -g -O0 \
+         -Wno-macro-redefined -Wno-gnu-designator -Wno-sometimes-uninitialized -Wno-tautological-compare \
+         -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include
+LDFLAGS = -L. -arch armv7
+ASFLAGS = -arch arm
+
+LIBGCC = $(shell $(CC) -print-libgcc-file-name)
+
+# host compiler
+HOSTCC_preferred = clang
+define get_hostcc
+    $(if $(shell which $(HOSTCC_preferred)),$(HOSTCC_preferred),"cc")
+endef
+HOSTCC := $(call get_hostcc)
+
+# general rules
+quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
+
+LINK_BIN = $(call quiet-command,$(LD) $(LDFLAGS) \
+	-T $(1) -o $(2) $(3) $(LIBS) -b binary $(4), "  LINK     $(TARGET_DIR)$@")
+
+LINK_INIT = $(call quiet-command,$(LD) $(LDFLAGS) \
+	$(1) -o $@.out $<, "  LINK     $(TARGET_DIR)$@")
+OBJCOPY_INIT = $(call quiet-command,$(OBJCOPY) \
+	-S -O binary --prefix-symbols="_binary_$@" $@.out $@, "  OBJCOPY  $(TARGET_DIR)$@")
+
+build-directory = $(shell mkdir -p build build/device build/lib)
+
+build/%.o: %.c
+	$(call build-directory)
+	$(call quiet-command,$(CC) $(CFLAGS) \
+		-c -o $@ $<,"  CC       $(TARGET_DIR)$@")
+
+AS_WITH = $(call quiet-command,$(CC) $(ASFLAGS) \
+		$(1) -c -o $@ $<,"  AS       $(TARGET_DIR)$@")
+
+build/%.o: %.S
+	$(call build-directory)
+	$(call AS_WITH, )