support Mac OS X

Makefile

@@ -1,3 +1,5 @@
+OS = Mac
+
 # indicate the Hardware Image file
 HDA_IMG = hdc-0.11.img
 
@@ -44,11 +46,11 @@ all:	Image
 
 Image: boot/bootsect boot/setup tools/system
 	@cp -f tools/system system.tmp
-	@strip system.tmp
-	@objcopy -O binary -R .note -R .comment system.tmp tools/kernel
+	@$(STRIP) system.tmp
+	@$(OBJCOPY) -O binary -R .note -R .comment system.tmp tools/kernel
 	@tools/build.sh boot/bootsect boot/setup tools/kernel Image $(ROOT_DEV)
 	@rm system.tmp
-	@rm tools/kernel -f
+	@rm -f tools/kernel
 	@sync
 
 disk: Image
@@ -133,13 +135,11 @@ cscope:
 	@cscope -Rbkq
 
 start:
-	@qemu -m 16M -boot a -fda Image -hda $(HDA_IMG)
-
-bochs-start:
-	@$(BOCHS) -q -f tools/bochs/bochsrc/bochsrc-hd.bxrc	
+	@qemu-system-x86_64 -m 16M -boot a -fda Image -hda $(HDA_IMG)
 
 debug:
-	@qemu -m 16M -boot a -fda Image -hda $(HDA_IMG) -s -S -nographic -serial '/dev/ttyS0'
+	@echo $(OS)
+	@qemu-system-x86_64 -m 16M -boot a -fda Image -hda $(HDA_IMG) -s -S
 
 bochs-debug:
 	@$(BOCHS) -q -f tools/bochs/bochsrc/bochsrc-hd-dbg.bxrc	

Makefile.header

@@ -1,17 +1,35 @@
-# This file is the Makefile Header for every sub Makefile, which designed to
-# simplfy the porting and maintaining operation
-# author: falcon <[email protected]>
-# update: 2008-10-29
-
-AS	= as --32
-LD	= ld
-#LDFLAGS = -m elf_i386 -x 
-LDFLAGS = -m elf_i386
-CC	= gcc
-CFLAGS  = -g -m32 -fno-builtin -fno-stack-protector -fomit-frame-pointer -fstrength-reduce #-Wall
-
-CPP	= cpp -nostdinc
-AR	= ar
-
-# we should use -fno-stack-protector with gcc 4.3
-gcc_version=$(shell ls -l `which gcc` | tr '-' '\n' | tail -1)
+UNAME := $(shell uname)
+
+ifeq ($(UNAME), Linux)
+	AS	= as --32
+	LD	= ld
+	#LDFLAGS = -m elf_i386 -x 
+	LDFLAGS = -m elf_i386
+	CC	= gcc
+	CFLAGS  = -g -m32 -fno-builtin -fno-stack-protector -fomit-frame-pointer -fstrength-reduce #-Wall
+
+	CPP	= cpp -nostdinc
+	AR	= ar
+	STRIP = strip
+	OBJCOPY = objcopy
+	# we should use -fno-stack-protector with gcc 4.3
+	gcc_version=$(shell ls -l `which gcc` | tr '-' '\n' | tail -1)
+endif
+
+
+
+ifeq ($(UNAME), Darwin)
+	AS	= i386-elf-as --32
+	LD	= i386-elf-ld
+	#LDFLAGS = -m elf_i386 -x 
+	LDFLAGS = -m elf_i386
+	CC	= i386-elf-gcc-4.3.2
+	CFLAGS  = -gdwarf-2 -g3 -m32 -fno-builtin -fno-stack-protector -fomit-frame-pointer -fstrength-reduce #-Wall
+
+	CPP	= i386-elf-cpp-4.3.2 -nostdinc
+	AR	=i386-elf-ar
+	STRIP = i386-elf-strip
+	OBJCOPY = i386-elf-objcopy
+endif
+
+

README.md

@@ -1,4 +1,41 @@
 Linux-0.11
 ==========
 
-The old Linux kernel source ver 0.11 which has been tested under modern Linux,  Mac OSX and Windows.
+The old Linux kernel source ver 0.11 which has been tested under modern Linux,  Mac OSX and Windows.
+
+1. Build on Linux
+
+1.1. Linux Setup
+
+* a linux distribution: debian , ubuntu and mint are recommended
+* some tools: gcc gdb qemu
+* a linux-0.11 hardware image file: hdc-0.11.img, please download it from http://www.oldlinux.org, or http://mirror.lzu.edu.cn/os/oldlinux.org/, ant put it in the root directory.
+
+1.2. hack linux-0.11
+
+$ make help		// get help
+$ make  		// compile
+$ make start		// boot it on qemu
+$ make debug		// debug it via qemu & gdb, you'd start gdb to connect it.
+
+$ gdb tools/system
+(gdb) target remote :1234
+(gdb) b main
+(gdb) c
+
+
+2. Build on Mac OS X
+
+2.1. Mac OS X Setup
+
+* install qemu
+	$ sudo port install qemu
+* install cross compiler gcc and binutils
+	$ sudo port install i386-elf-binutils i386-elf-gcc qemu
+* install gdb. you need download the gdb source and compile it to use gdb because port doesn't provide i386-elf-gdb, or you can use the pre-compiled gdb in the tools directory.
+* a linux-0.11 hardware image file: hdc-0.11.img
+
+2.2. hack linux-0.11
+
+	same as section 1.2
+

boot/Makefile

@@ -7,13 +7,13 @@ all: bootsect setup
 bootsect: bootsect.s
 	@$(AS) -o bootsect.o bootsect.s
 	@$(LD) $(LDFLAGS) -o bootsect bootsect.o
-	@objcopy -R .pdr -R .comment -R.note -S -O binary bootsect
+	@$(OBJCOPY) -R .pdr -R .comment -R.note -S -O binary bootsect
 
 
 setup: setup.s
 	@$(AS) -o setup.o setup.s
 	@$(LD) $(LDFLAGS) -o setup setup.o
-	@objcopy -R .pdr -R .comment -R.note -S -O binary setup
+	@$(OBJCOPY) -R .pdr -R .comment -R.note -S -O binary setup
 
 head.o: head.s
 	@$(AS) -o head.o head.s

kernel/Makefile

@@ -20,12 +20,6 @@ LDFLAGS	+= -r
 
 CFLAGS	+= -I../include
 
-#ifneq ($(gcc_version), 4.3)
-
-#CFLAGS	+= -O1
-
-#endif
-
 CPP	+= -I../include
 
 .c.s: