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

　　

1 TITLE Call a Proc Demo 2 INCLUDE Irvine32.inc 3 includelib Irvine32.lib 4 includelib kernel32.lib 5 includelib user32.lib 6  7  8 .data 9 array    DWORD    1000h,2000h,3000h,4000h10 11 .code12 13 ;---------------------------------------------------14 ;15 ; Calcute the sum of an array of 32-bit int integers16 ; Receives:    ESI = the array offset17 ;        ECX = the size of array18 ; Returns:    EAX = sum of an array19 ;---------------------------------------------------20 21 ArraySum PROC22     23     push esi24     push ecx25     mov eax,0    26 L1:27     add eax,[esi]28     add esi,TYPE DWORD29     loop L130     31     pop ecx32     pop esi33     ret34 35 ArraySum endp36 37 ;---------------------------------------------------38 ;39 ; Calcute the sum of an array of 32-bit int integers40 ; Receives:    ESI = the array offset41 ;        ECX = the size of array42 ; Returns:    EAX = sum of an array43 ;---------------------------------------------------44 45 ArraySumWithUses PROC USES    esi ecx46     47     mov eax,0    48 L2:49     add eax,[esi]50     add esi,TYPE DWORD51     loop L252     53     ret54 55 ArraySumWithUses endp56 57 58 59 main PROC60     61     mov esi,offset array62     mov ecx,LENGTHOF array63     call ArraySum64     call DumpRegs65     mov esi,offset array66     mov ecx,LENGTHOF array67     call ArraySumWithUses68     call DumpRegs69     ret70 71 main endp72 73 END main

执行结果：