eg0411.lst

宏汇编器

Microsoft (R) Macro Assembler Version 6.15.8803		    08/18/07 18:07:46
eg0411.asm						     Page 1 - 1


				;eg0411.asm
					include io32.inc
			      C .nolist
			      C .list
			      C 
 00000000				.data
 00000000 EA			key	byte 234
 = 000000FF			bufnum	= 255
 00000001  00000100 [		buffer	byte bufnum+1 dup(0)	; 定义键盘输入需要的缓冲区
	    00
	   ]
 00000101 45 6E 74 65 72	msg1	byte 'Enter messge: ',0
	   20 6D 65 73 73
	   67 65 3A 20 00
 00000110 45 6E 63 72 79	msg2	byte 'Encrypted message: ',0
	   70 74 65 64 20
	   6D 65 73 73 61
	   67 65 3A 20 00
 00000124 0D 0A 4F 72 69	msg3	byte 13,10,'Original messge: ',0
	   67 69 6E 61 6C
	   20 6D 65 73 73
	   67 65 3A 20 00
 00000000				.code
 00000000			start:
 00000000  B8 00000101 R		mov eax,offset msg1	; 提示输入字符串
 00000005  E8 00000000 E		call dispmsg
 0000000A  B8 00000001 R		mov eax,offset buffer	; 设置入口参数EAX
 0000000F  E8 00000000 E		call readmsg	; 调用输入字符串子程序
 00000014  50				push eax	; 字符个数保存进入堆栈
 00000015  8B C8			mov ecx,eax	; ECX＝实际输入的字符个数，作为循环的次数
 00000017  33 DB			xor ebx,ebx	; EBX指向输入字符
 00000019  A0 00000000 R	encrypt:	mov al,key	; AL＝加密关键字
 0000001E  30 83 00000001 R		xor buffer[ebx],al	; 异或加密
 00000024  43				inc ebx
 00000025  49				dec ecx	; 等同于指令：loop encrypt
 00000026  75 F1			jnz encrypt	; 处理下一个字符
 00000028  B8 00000110 R		mov eax,offset msg2
 0000002D  E8 00000000 E		call dispmsg
 00000032  B8 00000001 R		mov eax,offset buffer	; 显示加密后的密文
 00000037  E8 00000000 E		call dispmsg
					;
 0000003C  59				pop ecx	; 从堆栈弹出字符个数，作为循环的次数
 0000003D  33 DB			xor ebx,ebx	; EBX指向输入字符
 0000003F  A0 00000000 R	decrypt:	mov al,key	; AL＝解密关键字
 00000044  30 83 00000001 R		xor buffer[ebx],al	; 异或解密
 0000004A  43				inc ebx
 0000004B  49				dec ecx
 0000004C  75 F1			jnz decrypt	; 处理下一个字符
 0000004E  B8 00000124 R		mov eax,offset msg3
 00000053  E8 00000000 E		call dispmsg
 00000058  B8 00000001 R		mov eax,offset buffer	; 显示解密后的明文
 0000005D  E8 00000000 E		call dispmsg

					exit 0
					end start
Microsoft (R) Macro Assembler Version 6.15.8803		    08/18/07 18:07:46
eg0411.asm						     Symbols 2 - 1




Macros:

                N a m e                 Type

exit . . . . . . . . . . . . . .	Proc


Segments and Groups:

                N a m e                 Size     Length   Align   Combine Class

FLAT . . . . . . . . . . . . . .	GROUP
_DATA  . . . . . . . . . . . . .	32 Bit	 00000138 Para	  Public  'DATA'	
_TEXT  . . . . . . . . . . . . .	32 Bit	 00000069 Para	  Public  'CODE'	


Procedures,  parameters and locals:

                N a m e                 Type     Value    Attr

ExitProcess  . . . . . . . . . .	P Near	 00000000 FLAT	Length= 00000000 External STDCALL


Symbols:

                N a m e                 Type     Value    Attr

@CodeSize  . . . . . . . . . . .	Number	 00000000h   
@DataSize  . . . . . . . . . . .	Number	 00000000h   
@Interface . . . . . . . . . . .	Number	 00000003h   
@Model . . . . . . . . . . . . .	Number	 00000007h   
@code  . . . . . . . . . . . . .	Text   	 _TEXT
@data  . . . . . . . . . . . . .	Text   	 FLAT
@fardata?  . . . . . . . . . . .	Text   	 FLAT
@fardata . . . . . . . . . . . .	Text   	 FLAT
@stack . . . . . . . . . . . . .	Text   	 FLAT
buffer . . . . . . . . . . . . .	Byte	 00000001 _DATA	
bufnum . . . . . . . . . . . . .	Number	 000000FFh   
decrypt  . . . . . . . . . . . .	L Near	 0000003F _TEXT	
dispbb . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
dispbd . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
dispbw . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
dispcrlf . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
dispc  . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
disphb . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
disphd . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
disphw . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
dispmsg  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
disprb . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
disprd . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
disprf . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
disprw . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
dispsib  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
dispsid  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
dispsiw  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
dispuib  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
dispuid  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
dispuiw  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
encrypt  . . . . . . . . . . . .	L Near	 00000019 _TEXT	
key  . . . . . . . . . . . . . .	Byte	 00000000 _DATA	
msg1 . . . . . . . . . . . . . .	Byte	 00000101 _DATA	
msg2 . . . . . . . . . . . . . .	Byte	 00000110 _DATA	
msg3 . . . . . . . . . . . . . .	Byte	 00000124 _DATA	
readbb . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readbd . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readbw . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readc  . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readhb . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readhd . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readhw . . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readmsg  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readsib  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readsid  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readsiw  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readuib  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readuid  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
readuiw  . . . . . . . . . . . .	L Near	 00000000 FLAT	External STDCALL
start  . . . . . . . . . . . . .	L Near	 00000000 _TEXT	Public STDCALL

	   0 Warnings
	   0 Errors