《Intel汇编第5版》 汇编调用子过程

一、Call和Ret指令

　　

二、在子过程中需要自己保存可能会修改掉的寄存器值，这里可以使用USES伪指令来生成

　　

三、一个数组求和的汇编例子

　　

 TITLE Call a Proc Demo
 INCLUDE Irvine32.inc
 includelib Irvine32.lib
 includelib kernel32.lib
 includelib user32.lib
 
 .data
 array    DWORD    1000h,2000h,3000h,4000h
 
 .code
 
 ;---------------------------------------------------
 ;
 ; Calcute the sum of an array of 32-bit int integers
 ; Receives:    ESI = the array offset
 ;        ECX = the size of array
 ; Returns:    EAX = sum of an array
 ;---------------------------------------------------
 
 ArraySum PROC
 
     push esi
     push ecx
     mov eax,
 L1:
     add eax,[esi]
     add esi,TYPE DWORD
     loop L1
 
     pop ecx
     pop esi
     ret
 
 ArraySum endp
 
 ;---------------------------------------------------
 ;
 ; Calcute the sum of an array of 32-bit int integers
 ; Receives:    ESI = the array offset
 ;        ECX = the size of array
 ; Returns:    EAX = sum of an array
 ;---------------------------------------------------
 
 ArraySumWithUses PROC USES    esi ecx
 
     mov eax,
 L2:
     add eax,[esi]
     add esi,TYPE DWORD
     loop L2
 
     ret
 
 ArraySumWithUses endp
 
 main PROC
 
     mov esi,offset array
     mov ecx,LENGTHOF array
     call ArraySum
     call DumpRegs
     mov esi,offset array
     mov ecx,LENGTHOF array
     call ArraySumWithUses
     call DumpRegs
     ret
 
 main endp
 
 END main

执行结果：