"Intel Assembler 5th Edition" Assembly Call sub-procedure

I. Call and RET directives

　　

Second, in the sub-process, you need to save the value of the register may be modified, here you can use the uses pseudo-directive to generate

　　

Compilation example of a city array summation

　　

1TITLEPagera Proc Demo2INCLUDE Irvine32.Inc3 includelib Irvine32.lib4 includelib Kernel32.lib5 includelib User32.lib6 7 8 . Data9 Array DWORD 1000h,2000h,3000h,4000hTen  One . Code A  - ;--------------------------------------------------- - ; the ;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 A      at     PushESI -     Pushecx -     moveax0     - L1: -     AddEax,[esi] -     AddEsi,type DWORD in Loop L1 -      to     Popecx +     PopESI -     ret the  * arraysum ENDP $ Panax Notoginseng ;--------------------------------------------------- - ; the ;Calcute The sum of an array of 32-bit int integers + ;Receives:esi = the array offset A ;ECX = the size of array the ;returns:eax = Sum of an array + ;--------------------------------------------------- -  $ arraysumwithuses PROC USES esi ecx $      -     moveax0     - L2: the     AddEax,[esi] -     AddEsi,type DWORDWuyi Loop L2 the      -     ret Wu  - arraysumwithuses ENDP About  $  -  - Main PROC -      A     movEsi,offset Array +     movEcx,lengthof Array the     PagerArraysum -     PagerDumpregs $     movEsi,offset Array the     movEcx,lengthof Array the     Pagerarraysumwithuses the     PagerDumpregs the     ret -  in main ENDP the  theEND Main

Execution Result:

"Intel Assembler 5th Edition" Assembly Call sub-procedure