The smallest program for Pocket PC

Yaroslav Goncharov · **Joined:** Sun Mar 30, 2003 4:54 pm **Posts:** 695

<img src="/images/news/clipart/smallprog.gif" align="left" width="120" height="160" hspace="4">Alexander Dovgaluk has created the smallest program for Pocket PC I have ever seen. How big is the program? Only 352 bytes. Despite of its small size it has rich functionality. Well, not really. Still the program is almost as good as a classic "Hello World". It salutes you with a message box saying "Msg".

The program features a few tricks such as moving code to the MZ header and using SysCall directly for calling system APIs. Interested in details? Download the program or see the complete ARM assembly language listing below:

Code:

CODE32 

   EXPORT   |Main| 

   AREA    |.text|, CODE, ARM 

|Main| PROC 

   stmfd sp!, {r0-r8,lr} 

   add r0, sp, #4 
   str r0, [sp] 
   mov r0, #0 
   add r1, pc, #0x18 
   mov r2, r1 
   mov r3, #0x40 
   mov lr, pc 
   ldr pc, |MessageBoxW| 
   add sp, sp, #0x20 

   ldmfd sp!, {pc} 

   ENDP 

|MessageBoxW| dcd (0xF0010000 - (0x11 << 8 + 0x32) * 4) 

|msg|   dcb "m", 0, "s", 0, "g", 0, 0, 0 

   END

Alexander Dovgaluk · **Posted:** Wed Oct 25, 2006 8:51 am

i created same program with smaller size :)
now it is only 288 bytes and have the same functionality.

sethfogie · **Joined:** Wed Nov 01, 2006 7:31 pm **Posts:** 4

Thanks

sethfogie · **Joined:** Wed Nov 01, 2006 7:31 pm **Posts:** 4

NM about the make file. I see what you are up to

Messing with the PE header...

sethfogie · **Joined:** Wed Nov 01, 2006 7:31 pm **Posts:** 4

also upload the even smaller version?

thanks

Aresera · **Joined:** Fri Nov 24, 2006 11:47 am **Posts:** 1

can anybody tell me, how can i program assembly for ARM chip right in pocketPC

sethfogie · **Joined:** Wed Nov 01, 2006 7:31 pm **Posts:** 4

seth & fogieonline with a dot and a com

nbcool · **Joined:** Tue Jun 12, 2007 7:42 am **Posts:** 1

how to link it to exe file?

use armasm [source file] will got a .obj file,but how to link it?

sohail · **Posted:** Sun Jul 22, 2007 2:14 pm

hey sethfogie,
couldnt fild the link

ethan_qeej · **Joined:** Mon Aug 20, 2007 2:46 pm **Posts:** 14

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manutdx · **Joined:** Mon Mar 31, 2008 12:25 am **Posts:** 1

nbcool wrote:

how to link it to exe file?

use armasm [source file] will got a .obj file,but how to link it?

I still cant figure out how to link it to exe file?

Snow123 · **Joined:** Wed Apr 23, 2008 5:49 am **Posts:** 3

Well, not really. Still the program is almost as good as a classic "Hello World". It salutes you with a message box saying "Msg".

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