initial copy from http://www.oldlinux.org/oldlinux/viewthread.php?tid…

…=13681

.gitignore

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+Thumbs.db
+*.log
+*.bak
+.DS_Store
+

Makefile

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+# indicate the Hardware Image file
+HDA_IMG = ../rootfs/hdc-0.11-new.img
+
+# indicate the path of the calltree
+CALLTREE=$(shell find tools/ -name "calltree" -perm 755 -type f)
+
+# indicate the path of the bochs
+#BOCHS=$(shell find tools/ -name "bochs" -perm 755 -type f)
+BOCHS=bochs
+
+#
+# if you want the ram-disk device, define this to be the
+# size in blocks.
+#
+RAMDISK =  #-DRAMDISK=512
+
+# This is a basic Makefile for setting the general configuration
+include Makefile.header
+
+LDFLAGS	+= -Ttext 0 -e startup_32
+CFLAGS	+= $(RAMDISK) -Iinclude
+CPP	+= -Iinclude
+
+#
+# ROOT_DEV specifies the default root-device when making the image.
+# This can be either FLOPPY, /dev/xxxx or empty, in which case the
+# default of /dev/hd6 is used by 'build'.
+#
+ROOT_DEV= #FLOPPY 
+
+ARCHIVES=kernel/kernel.o mm/mm.o fs/fs.o
+DRIVERS =kernel/blk_drv/blk_drv.a kernel/chr_drv/chr_drv.a
+MATH	=kernel/math/math.a
+LIBS	=lib/lib.a
+
+.c.s:
+	@$(CC) $(CFLAGS) -S -o $*.s $<
+.s.o:
+	@$(AS)  -o $*.o $<
+.c.o:
+	@$(CC) $(CFLAGS) -c -o $*.o $<
+
+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
+	@tools/build.sh boot/bootsect boot/setup tools/kernel Image $(ROOT_DEV)
+	@rm system.tmp
+	@rm tools/kernel -f
+	@sync
+
+disk: Image
+	@dd bs=8192 if=Image of=/dev/fd0
+
+boot/head.o: boot/head.s
+	@make head.o -C boot/
+
+tools/system:	boot/head.o init/main.o \
+		$(ARCHIVES) $(DRIVERS) $(MATH) $(LIBS)
+	@$(LD) $(LDFLAGS) boot/head.o init/main.o \
+	$(ARCHIVES) \
+	$(DRIVERS) \
+	$(MATH) \
+	$(LIBS) \
+	-o tools/system 
+	@nm tools/system | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aU] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)'| sort > System.map 
+
+kernel/math/math.a:
+	@make -C kernel/math
+
+kernel/blk_drv/blk_drv.a:
+	@make -C kernel/blk_drv
+
+kernel/chr_drv/chr_drv.a:
+	@make -C kernel/chr_drv
+
+kernel/kernel.o:
+	@make -C kernel
+
+mm/mm.o:
+	@make -C mm
+
+fs/fs.o:
+	@make -C fs
+
+lib/lib.a:
+	@make -C lib
+
+boot/setup: boot/setup.s
+	@make setup -C boot
+
+boot/bootsect: boot/bootsect.s
+	@make bootsect -C boot
+
+tmp.s:	boot/bootsect.s tools/system
+	@(echo -n "SYSSIZE = (";ls -l tools/system | grep system \
+		| cut -c25-31 | tr '\012' ' '; echo "+ 15 ) / 16") > tmp.s
+	@cat boot/bootsect.s >> tmp.s
+
+clean:
+	@rm -f Image System.map tmp_make core boot/bootsect boot/setup
+	@rm -f init/*.o tools/system boot/*.o typescript* info bochsout.txt
+	@for i in mm fs kernel lib boot; do make clean -C $$i; done 
+info:
+	@make clean
+	@script -q -c "make all"
+	@cat typescript | col -bp | grep -E "warning|Error" > info
+	@cat info
+
+distclean: clean
+	@rm -f tag cscope* linux-0.11.* $(CALLTREE)
+	@(find tools/calltree-2.3 -name "*.o" | xargs -i rm -f {})
+	@make clean -C tools/calltree-2.3
+	@make clean -C tools/bochs/bochs-2.3.7
+
+backup: clean
+	@(cd .. ; tar cf - linux | compress16 - > backup.Z)
+	@sync
+
+dep:
+	@sed '/\#\#\# Dependencies/q' < Makefile > tmp_make
+	@(for i in init/*.c;do echo -n "init/";$(CPP) -M $$i;done) >> tmp_make
+	@cp tmp_make Makefile
+	@for i in fs kernel mm; do make dep -C $$i; done
+
+tag: tags
+tags:
+	@ctags -R
+
+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	
+
+debug:
+	@qemu -m 16M -boot a -fda Image -hda $(HDA_IMG) -s -S -nographic -serial '/dev/ttyS0'
+
+bochs-debug:
+	@$(BOCHS) -q -f tools/bochs/bochsrc/bochsrc-hd-dbg.bxrc	
+
+bochs:
+ifeq ($(BOCHS),)
+	@(cd tools/bochs/bochs-2.3.7; \
+	./configure --enable-plugins --enable-disasm --enable-gdb-stub;\
+	make)
+endif
+
+bochs-clean:
+	@make clean -C tools/bochs/bochs-2.3.7
+
+calltree:
+ifeq ($(CALLTREE),)
+	@make -C tools/calltree-2.3
+endif
+
+calltree-clean:
+	@(find tools/calltree-2.3 -name "*.o" \
+	-o -name "calltree" -type f | xargs -i rm -f {})
+
+cg: callgraph
+callgraph:
+	@calltree -b -np -m init/main.c | tools/tree2dotx > linux-0.11.dot
+	@dot -Tjpg linux-0.11.dot -o linux-0.11.jpg
+
+help:
+	@echo "<<<<This is the basic help info of linux-0.11>>>"
+	@echo ""
+	@echo "Usage:"
+	@echo "     make --generate a kernel floppy Image with a fs on hda1"
+	@echo "     make start -- start the kernel in qemu"
+	@echo "     make debug -- debug the kernel in qemu & gdb at port 1234"
+	@echo "     make disk  -- generate a kernel Image & copy it to floppy"
+	@echo "     make cscope -- genereate the cscope index databases"
+	@echo "     make tags -- generate the tag file"
+	@echo "     make cg -- generate callgraph of the system architecture"
+	@echo "     make clean -- clean the object files"
+	@echo "     make distclean -- only keep the source code files"
+	@echo ""
+	@echo "Note!:"
+	@echo "     * You need to install the following basic tools:"
+	@echo "          ubuntu|debian, qemu|bochs, ctags, cscope, calltree, graphviz "
+	@echo "          vim-full, build-essential, hex, dd, gcc 4.3.2..."
+	@echo "     * Becarefull to change the compiling options, which will heavily"
+	@echo "     influence the compiling procedure and running result."
+	@echo ""
+	@echo "Author:"
+	@echo "     * 1991, linus write and release the original linux 0.95(linux 0.11)."
+	@echo "     * 2005, jiong.zhao<[email protected]> release a new version "
+	@echo "     which can be used in RedHat 9 along with the book 'Explaining "
+	@echo "     Linux-0.11 Completly', and he build a site http://www.oldlinux.org"
+	@echo "     * 2008, falcon<[email protected]> release a new version which can be"
+	@echo "     used in ubuntu|debian 32bit|64bit with gcc 4.3.2, and give some new "
+	@echo "     features for experimenting. such as this help info, boot/bootsect.s and"
+	@echo "     boot/setup.s with AT&T rewritting, porting to gcc 4.3.2 :-)"
+	@echo ""
+	@echo "<<<Be Happy To Play With It :-)>>>"
+
+### Dependencies:
+init/main.o: init/main.c include/unistd.h include/sys/stat.h \
+  include/sys/types.h include/sys/times.h include/sys/utsname.h \
+  include/utime.h include/time.h include/linux/tty.h include/termios.h \
+  include/linux/sched.h include/linux/head.h include/linux/fs.h \
+  include/linux/mm.h include/signal.h include/asm/system.h \
+  include/asm/io.h include/stddef.h include/stdarg.h include/fcntl.h

Makefile.header

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+# 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)

boot/Makefile

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+include ../Makefile.header
+
+LDFLAGS	+= -Ttext 0
+
+all: bootsect setup
+
+bootsect: bootsect.s
+	@$(AS) -o bootsect.o bootsect.s
+	@$(LD) $(LDFLAGS) -o bootsect bootsect.o
+	@objcopy -R .pdr -R .comment -R.note -S -O binary bootsect
+
+
+setup: setup.s
+	@$(AS) -o setup.o setup.s
+	@$(LD) $(LDFLAGS) -o setup setup.o
+	@objcopy -R .pdr -R .comment -R.note -S -O binary setup
+
+head.o: head.s
+	@$(AS) -o head.o head.s
+
+clean:
+	@rm -f bootsect bootsect.o setup setup.o head.o