How to view the register?

[zhiling0229]

Hi,

i would like to know how display the registers and flags before exiting the program?

  .386                   ; set processor type, another option is .686
  .model flat, stdcall   ; memory model & calling convention
  option casemap :none   ; case sensitive

  ; ----------------------------------------------
  ; Include any needed INCLUDE and LIBRARY files
  ; and procedure prototypes.
  ; ----------------------------------------------
  include \masm32\include\windows.inc
  include \masm32\include\user32.inc
  include \masm32\include\kernel32.inc

  includelib \masm32\lib\user32.lib
  includelib \masm32\lib\kernel32.lib

Main PROTO

  ; ---------------------------------------------------
  ; Include any needed global constants and variables
  ; both initialized and uninitialized
  ; ---------------------------------------------------
.const
    con_init equ 255
.data
    var_init dd 0
   
.data?
    var_unin dd ?


.code
start:

  invoke Main
  invoke ExitProcess,0

Main PROC
  mov   eax,10000h      ; EAX = 10000h
  add   eax,40000h      ; EAX = 50000h
  sub   eax,20000h      ; EAX = 30000h
                                ; What should I put here?
  ret
Main ENDP

end start

[dsouza123]

An example using MessageBoxes, for windowed output,
there are two nearly identical message boxes
the first shows the values in decimal,
the second in hexadecimal.

It is a takeoff on Hutch's console version.
http://www.masm32.com/board/index.php?topic=3876.msg28893#msg28895


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[TNick]

If you want to avoid the obvious solution (using a debuger), you may
- use macros from \masm32\macros if you are building a console exe (print, chr$, ustr$, sstr$, hex$)

Code Select Expand

Main PROC
  mov   eax,10000h      ; EAX = 10000h
  add   eax,40000h      ; EAX = 50000h
  sub   eax,20000h      ; EAX = 30000h
                                ; What should I put here?
  push eax ; the print macro will mess up your eax register, so save it onto the stack
  print "EAX value at the end of the function is: " ; put a text on the console
  pop eax ; reload eax with it's saved value from stack
  print hex$(eax),13,10 ; convert numeric valkue of the eax to it's string reprezentation in hexadecimal
  ;print this string and insert a new line (13,10)
  inkey  ; will output "Push any key to continue ..." and wait for a key stroke
  ret
Main ENDP

- use dwtoa or dw2hex from masm32.lib and use OutputDebugString API function

Nick

[dsouza123]

The attachment is a screenshot of the hexadecimal version of the registers and flags MessageBox.



[attachment deleted by admin]

[PBrennick]

This is very nice and very useful. May I add this to the GeneSys project?

Paul

[dsouza123]

Sure.