《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

 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,4000h
10
11 .code
12
13 ;---------------------------------------------------
14 ;
15 ; Calcute the sum of an array of 32-bit int integers
16 ; Receives:    ESI = the array offset
17 ;        ECX = the size of array
18 ; Returns:    EAX = sum of an array
19 ;---------------------------------------------------
20
21 ArraySum PROC
22
23     push esi
24     push ecx
25     mov eax,0
26 L1:
27     add eax,[esi]
28     add esi,TYPE DWORD
29     loop L1
30
31     pop ecx
32     pop esi
33     ret
34
35 ArraySum endp
36
37 ;---------------------------------------------------
38 ;
39 ; Calcute the sum of an array of 32-bit int integers
40 ; Receives:    ESI = the array offset
41 ;        ECX = the size of array
42 ; Returns:    EAX = sum of an array
43 ;---------------------------------------------------
44
45 ArraySumWithUses PROC USES    esi ecx
46
47     mov eax,0
48 L2:
49     add eax,[esi]
50     add esi,TYPE DWORD
51     loop L2
52
53     ret
54
55 ArraySumWithUses endp
56
57
58
59 main PROC
60
61     mov esi,offset array
62     mov ecx,LENGTHOF array
63     call ArraySum
64     call DumpRegs
65     mov esi,offset array
66     mov ecx,LENGTHOF array
67     call ArraySumWithUses
68     call DumpRegs
69     ret
70
71 main endp
72
73 END main

执行结果：