2019-12-26 back-up

Mionger · Dec 25, 2019 · a3e7e7d · a3e7e7d
commit a3e7e7d
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diff --git a/UNIX-V6PP/Link.ld b/UNIX-V6PP/Link.ld
@@ -0,0 +1,42 @@
+/*Link.ld*/
+OUTPUT_FORMAT("pei-i386")
+
+ENTRY(greatstart)
+
+SECTIONS
+{
+	.text 0xc0100000:
+	{
+		code = .; _code = .; __code = .;
+		*(.text)
+		. = ALIGN(4096);
+	}
+
+	.data :
+	{
+		__CTOR_LIST__ = .;
+
+		*(.ctors) 
+		LONG(0)
+		__CTOR_END__ = .;
+
+		__DTOR_LIST__ = .;
+		/*LONG((__DTOR_END__ - __DTOR_LIST__) /4 - 2)*/
+		*(.dtors)
+		LONG(0)
+		__DTOR_END__ = .;
+
+		data = .; _data = .; __data = .;
+		*(.data)
+		. = ALIGN(4096);
+	}
+
+	.bss :
+	{
+		bss = .; _bss = .; __bss = .;
+		*(.bss)
+		. = ALIGN(4096);
+	}
+
+	end = .; _end =.; __end = .;
+}
diff --git a/UNIX-V6PP/Makefile b/UNIX-V6PP/Makefile
@@ -0,0 +1,53 @@
+include Makefile.inc
+
+.PHONY : all build deploy run $(DIRS)
+
+PROGRAMS =	cat	\
+			cp	\
+			ls	\
+			mkdir \
+			rm	\
+			date \
+			perf \
+			rm
+
+all: build deploy 
+
+$(DIRS) : 
+	$(MAKE) --directory=$@
+
+build	: $(DIRS)	
+	$(LD) $(LDFLAGS) $(OBJS) -o $(TARGET)\kernel.exe	
+	$(OBJCOPY) -O binary $(TARGET)\kernel.exe $(TARGET)\kernel.bin
+	$(NM) $(TARGET)\kernel.exe > $(TARGET)\kernel.sym
+	$(OBJDUMP) -d $(TARGET)\kernel.exe  > $(TARGET)\kernel.asm
+
+deploy	:
+
+	copy $(TARGET)\boot.bin $(IMGTARGET)\boot.bin
+	copy $(TARGET)\kernel.bin $(IMGTARGET)\kernel.bin
+	copy $(TARGET)\kernel.sym  $(IMGTARGET)\kernel.sym
+	copy $(TARGET)\kernel.asm  $(IMGTARGET)\kernel.asm
+
+	cd $(IMGTARGET) && partcopy boot.bin 0 200 c.img 0
+	cd $(IMGTARGET) && partcopy kernel.bin 0 13000 c.img 200
+
+	copy $(TARGET)\boot.bin $(MakeImageDebug)\boot.bin
+	copy $(TARGET)\kernel.bin $(MakeImageDebug)\kernel.bin
+	copy $(IMGTARGET)\c.img $(MakeImageDebug)\c.img
+
+	cd $(MakeImageDebug) && build.exe c.img boot.bin kernel.bin programs
+	copy $(MakeImageDebug)\$(IMG) $(UNIXV6PPTARGET)\$(IMG)
+
+clean	:	
+	del     $(TARGET)\*.o
+	del     $(TARGET)\*.exe
+	del     $(TARGET)\*.bin
+	del     $(TARGET)\*.sym
+	del     $(TARGET)\*.asm
+
+	del     $(IMGTARGET)\*.bin
+	del     $(IMGTARGET)\*.sym
+	del     $(IMGTARGET)\*.asm
+
+	del     $(UNIXV6PPTARGET)\c.img
diff --git a/UNIX-V6PP/Makefile.inc b/UNIX-V6PP/Makefile.inc
@@ -0,0 +1,44 @@
+#命令定义
+CC = g++
+LD = ld
+OBJCOPY = objcopy
+OBJDUMP = objdump
+ASM = nasm
+NM = nm
+MAKE = make
+
+#参数定义
+#g++参数
+CFLAGS = -Wall -O0 -g -nostartfiles -nostdlib -fno-builtin -fno-rtti -fno-exceptions -nostdinc
+#ld参数
+LDFLAGS = -T $(LINKSCRIPT)
+
+#目录定义
+OBJFILES = ..\objs
+TARGET = ..\targets\objs
+DIRS = boot kernel machine interrupt mm proc dev fs tty test pe lib program shell
+INCLUDE = ..\include
+IMGTARGET = ..\targets\img
+#"++"号是特殊符号，因此需要加引号
+UNIXV6PPTARGET = "..\targets\UNIXV6++"
+MakeImageDebug = ..\tools\MakeImage\bin\Debug
+
+#文件定义
+LINKSCRIPT = Link.ld
+SECTOR2_OBJ = sector2.bin
+CPP_OBJS = $(foreach OBJFILE, \
+	$(shell dir $(TARGET)\*.o /B), \
+	$(TARGET)\$(OBJFILE) \
+	)
+OBJS = $(TARGET)\$(SECTOR2_OBJ) $(CPP_OBJS)
+IMG = c.img
+
+#编译规则
+.c.s:
+	$(CC) $(CFLAGS) \
+	-S -o $*.s $<
+.s.o:
+	$(AS) -o $*.o $<
+.c.o:
+	$(CC) $(CFLAGS) \
+	-c -o $*.o $<
diff --git a/UNIX-V6PP/boot/Makefile b/UNIX-V6PP/boot/Makefile
@@ -0,0 +1,14 @@
+include ..\Makefile.inc
+
+TARGET = ..\..\targets\objs
+
+all		:	$(TARGET)\boot.bin $(TARGET)\sector2.bin $(TARGET)\support.o
+
+$(TARGET)\boot.bin	:	boot.s
+	$(ASM) -f bin boot.s -o $(TARGET)\boot.bin
+
+$(TARGET)\sector2.bin : sector2.s
+	$(ASM) -f elf sector2.s -o $(TARGET)\sector2.bin	
+
+$(TARGET)\support.o : support.c
+	$(CC) $(CFLAGS) -c $< -o $@
diff --git a/UNIX-V6PP/boot/boot.s b/UNIX-V6PP/boot/boot.s
@@ -0,0 +1,154 @@
+org 0x7c00
+
+;section .code16
+[BITS 16]
+start:
+		lgdt [gdtr]
+
+		cli
+
+		;打开a20 地址线
+		in al,92h
+		or al,00000010b
+		out 92h, al
+
+;		start to load sector 1 to memory 
+
+		mov eax, cr0;
+		or eax, 1;
+		mov cr0, eax
+
+		jmp dword 0x8:_startup ;
+
+
+;section .code32
+[BITS 32]
+_startup:
+
+		mov ax, 0x10
+		mov ds, ax
+		mov es, ax
+		mov ss, ax
+
+		mov	ecx, KERNEL_SIZE 	;cx = 扇区数KERNEL_SIZE，作为loop的次数
+		mov eax, 1				;LBA寻址模式下sector编号从0开始。  #0是引导扇区，#1扇区开始才是kernel的首扇区
+		mov ebx, 0x100000		;目标存放地址从1M处开始，每次loop递增512 bytes
+_load_kernel:
+		push eax
+		inc eax
+
+		push ebx
+		add	ebx, 512
+		call _load_sector
+		loop _load_kernel		
+
+		;修改所有寄存器到高位地址
+		mov ax, 0x20
+		mov ds, ax
+		mov es, ax
+		mov ss, ax
+		or esp, 0xc0000000
+		jmp 0x18:0xc0100000
+
+_load_sector:
+	push ebp
+	mov ebp,esp
+
+	push edx
+	push ecx
+	push edi
+	push eax		
+
+	mov al,1		;读1个扇区
+	mov dx,1f2h		;扇区数寄存器 0x1f2
+	out dx,al
+
+	mov eax,[ebp+12] ;[ebp+12]对应上面mov eax, 1   push eax指令入栈的值，eax为要读入的扇区号
+					;LBA28(Linear Block Addressing)模式输入扇区号的Bits 7~0， 共28 Bits扇区号
+	inc dx			;扇区号寄存器 0x1f3
+	out dx,al
+
+	shr eax,8		;LBA28(Linear Block Addressing)模式输入扇区号的Bits 15~8 放入AL中， 共28 Bits扇区号
+	inc dx			;Port：DX = 0x1f3+1 = 0x1f4  
+	out dx,al
+
+	shr eax,8		;LBA28(Linear Block Addressing)模式输入扇区号的Bits 23~16放入AL中， 共28 Bits扇区号
+	inc dx			;Port：DX = 0x1f4+1 = 0x1f5 
+	out dx,al
+
+	shr eax,8
+	and al,0x0f
+	or al,11100000b ;Bit(7和5)为1表示是IDE接口，Bit(6)为1表示开启LBA28模式，Bit(4)为1表示主盘。
+					;Bit(3~0)为LBA28中的Bit27~24位
+	inc dx			;Port：DX = 0x1f5+1 = 0x1f6 
+	out dx,al
+
+	mov al,0x20		;0x20表示读1个sector，0x30表示写1个sector
+	inc dx			;Port：DX = 0x1f6+1 = 0x1f7 
+	out dx,al
+
+.test:
+	in al,dx
+	test al,10000000b
+	jnz .test
+
+	test al,00001000b
+	jz .load_error
+
+
+	mov ecx,512/4
+	mov dx,0x1f0
+	mov edi,[ebp+8]	;取得call前入栈参数[ebp+8] = 0x100000  = 1MB
+	rep insd
+	xor ax,ax
+	jmp .load_exit
+
+.load_error:
+	mov dx,0x1f1
+	in al,dx
+	xor ah,ah
+
+.load_exit:
+
+	pop eax		
+	pop edi
+	pop ecx
+	pop edx
+	leave		;Destory stack frame
+	retn 8		
+
+;section .data
+KERNEL_SIZE		equ		180	    
+
+gdt:		
+		dw	0x0000
+		dw	0x0000
+		dw	0x0000
+		dw	0x0000
+
+		dw	0xFFFF		
+		dw	0x0000		
+		dw	0x9A00		
+		dw	0x00CF		
+
+		dw	0xFFFF		
+		dw	0x0000		
+		dw	0x9200		
+		dw	0x00CF		
+
+		dw	0xFFFF		
+		dw	0x0000		
+		dw	0x9A00		
+		dw	0x40CF		
+
+		dw	0xFFFF		
+		dw	0x0000		
+		dw	0x9200		
+		dw	0x40CF		
+
+gdtr:
+		dw $-gdt		;limit
+		dd gdt			;offset
+
+		times 510 - ($ - $$) db 0
+		dw 0xAA55
diff --git a/UNIX-V6PP/boot/sector2.s b/UNIX-V6PP/boot/sector2.s
@@ -0,0 +1,18 @@
+[BITS 32]
+[extern _main0]
+
+[extern __main]  	;"_main()"定义在support.c中
+[extern __atexit]	; "_atexit()"定义在support.c中
+
+global greatstart
+greatstart:
+	mov eax,1
+	mov eax,2
+	mov eax,3
+
+;Makefile中g++选项 -nostartfiles禁止了g++去链接startup code,
+;startup code即是在进入我们用C++编写的main0()函数之前，以及main0()
+;退出时执行的代码，其执行的工作是初始化(/销毁)global/static对象。
+	call __main		;call our own startup code
+	jmp _main0
+	call __atexit  	;call our own startup code
diff --git a/UNIX-V6PP/boot/support.c b/UNIX-V6PP/boot/support.c
@@ -0,0 +1,53 @@
+//Support.c
+
+/*
+函数名前需加上 extern “C”，虽然本文件名support.c是.c后缀的文件，
+文件内容也是pure C code，让是因为Makefile里面对support.c编译用的是
+g++，而不是gcc，所以函数名前面还是要加上extern “C”，否则会报
+“undefined reference to __main()”类似的错误。
+*/
+extern "C" void _main()
+{
+	extern void (*_CTOR_LIST__)();   
+	/*Note： 此处使用_CTOR_LIST__，变量名prefix 一个 ’_‘   
+			而link.ld中要prefix 两个 ’_‘*/
+
+	void (**constructor)() = &_CTOR_LIST__;
+
+	//the first element is the number of constructors
+	int total = *(int *)constructor;
+
+	//constructor++;   
+		/*  (可以先看一下链接脚本：Link.ld)
+		Link script中修改过后，这里的total已经不是constructor的个数了，
+		_CTOR_LIST__的第一个单元开始就是global/static对象的constructor，
+		所以不用 constructor++; 
+		*/
+
+	while(total) //total不是constructor的数量，而是用于检测是否到了_CTOR_LIST__的末尾
+	{
+		(*constructor)();
+		//total--;
+		constructor++;
+		total = *(int *)constructor;
+	}
+}
+
+extern "C" void _atexit()
+{
+	extern void (*_DTOR_LIST__)();
+
+	void (**deconstructor)() = &_DTOR_LIST__;
+
+	int total = *(int *)deconstructor;
+
+	deconstructor++;
+
+	while(total)
+	{
+		(*deconstructor)();
+		//total--;
+		deconstructor++;
+		total = *(int *)deconstructor;
+	}
+}